2026-09-11T17:57:57.636071Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="compile_runtime"}: package build phase finished phase="compile_runtime" elapsed_ms=0 success=true
2026-09-11T17:58:02.669297Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: screened exchange table geometry expansion_ms=974 expansion_and_footprint_ms=1204 estimated_row_bytes=29592 heuristic_row_bytes=38560 geometry_fragments_per_tile=3075 fragment_limit=16384
2026-09-11T17:58:02.693326Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: eliminated unread FP8 cast input padding clears removed=0
2026-09-11T17:58:02.863882Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=4 transfers=2181 maximum_identical_destinations=1
2026-09-11T17:58:02.863939Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=4 initial_horizon=8173 selected_horizon=8173 endpoint_lower_bound=6912 lower_bound_gap=1261 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:02.867020Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=4 tile=23 row_words=42 horizon=8173
2026-09-11T17:58:02.877980Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T17:58:02.878029Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:02.880277Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T17:58:02.909709Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T17:58:02.909761Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:02.915992Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T17:58:03.537066Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=9 transfers=43760 maximum_identical_destinations=1
2026-09-11T17:58:03.537130Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=9 initial_horizon=2347 selected_horizon=2347 endpoint_lower_bound=1960 lower_bound_gap=387 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:03.560638Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=9 tile=96 row_words=112 horizon=2347
2026-09-11T17:58:04.253282Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=7 transfers=66320 maximum_identical_destinations=1
2026-09-11T17:58:04.253362Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=7 initial_horizon=7349 selected_horizon=7349 endpoint_lower_bound=3240 lower_bound_gap=4109 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:04.285789Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=7 tile=966 row_words=285 horizon=7349
2026-09-11T17:58:04.389850Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=8 transfers=71168 maximum_identical_destinations=1
2026-09-11T17:58:04.389924Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=8 initial_horizon=13126 selected_horizon=13126 endpoint_lower_bound=8704 lower_bound_gap=4422 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:04.436731Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=8 tile=79 row_words=260 horizon=13126
2026-09-11T17:58:05.324379Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: compared ordinary and paired exchange schedules phase=0 candidates=2105 ordinary_horizon=14130 paired_horizon=18454 use_paired=false
2026-09-11T17:58:05.362989Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T17:58:05.363028Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:05.373165Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T17:58:06.158155Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T17:58:06.158255Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:06.212049Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=6 transfers=32720 maximum_identical_destinations=1
2026-09-11T17:58:06.212118Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=6 initial_horizon=6489 selected_horizon=6489 endpoint_lower_bound=5796 lower_bound_gap=693 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:06.277788Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=6 tile=71 row_words=618 horizon=6489
2026-09-11T17:58:06.365474Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T17:58:07.342399Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=5 transfers=127912 maximum_identical_destinations=1
2026-09-11T17:58:07.342476Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=5 initial_horizon=11672 selected_horizon=11672 endpoint_lower_bound=6912 lower_bound_gap=4760 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:07.588468Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=5 tile=79 row_words=2717 horizon=11672
2026-09-11T17:58:07.630347Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="plan_kernels"}: package build phase finished phase="plan_kernels" elapsed_ms=15 success=true
2026-09-11T17:58:07.631512Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="compile_kernels"}: compiling kernel source=artifacts/attention-grids-20260911/source/gemm_f16_amp.S name="gemm_f16_interleaved_k80_c64_r81_r81" target=ipu21
2026-09-11T17:58:07.690820Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="compile_kernels"}: kernel artifact created object=/srv/home/.cache/ipu-stack/kernels/4e3f59e92d8d6c2f10e563de3b481a949fe45745f84d21c738e90f4a1ad34725/kernel.o metadata=/srv/home/.cache/ipu-stack/kernels/4e3f59e92d8d6c2f10e563de3b481a949fe45745f84d21c738e90f4a1ad34725/kernel.json
2026-09-11T17:58:07.691047Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="compile_kernels"}: compiling kernel source=artifacts/attention-grids-20260911/source/gemm_f16_amp.S name="gemm_f16_interleaved_k80_c80_r81_r81" target=ipu21
2026-09-11T17:58:07.747339Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="compile_kernels"}: kernel artifact created object=/srv/home/.cache/ipu-stack/kernels/e514692fe2c5b842ba7e7f6b6ca48b7a471bf19b201c2aadb57935074a21383f/kernel.o metadata=/srv/home/.cache/ipu-stack/kernels/e514692fe2c5b842ba7e7f6b6ca48b7a471bf19b201c2aadb57935074a21383f/kernel.json
2026-09-11T17:58:07.747616Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="compile_kernels"}: compiling kernel source=artifacts/attention-grids-20260911/source/gemm_f16_amp.S name="gemm_f16_interleaved_k128_c80_r48_r49" target=ipu21
2026-09-11T17:58:07.800064Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="compile_kernels"}: kernel artifact created object=/srv/home/.cache/ipu-stack/kernels/c87c8ec8488e5771c0258ace90b9e6e045780d26e51aed911ce30f0debff1baa/kernel.o metadata=/srv/home/.cache/ipu-stack/kernels/c87c8ec8488e5771c0258ace90b9e6e045780d26e51aed911ce30f0debff1baa/kernel.json
2026-09-11T17:58:07.802010Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="compile_kernels"}: package build phase finished phase="compile_kernels" elapsed_ms=171 success=true
2026-09-11T17:58:07.805107Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="link_runtime"}: package build phase finished phase="link_runtime" elapsed_ms=0 success=true
2026-09-11T17:58:07.835518Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: exchange table and repeat patch storage exchange_table_bytes=20352 maximum_uncompressed_repeat_patch_bytes=0 maximum_elided_arithmetic_patch_bytes=0
2026-09-11T17:58:07.981693Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="size_tile_code"}: package build phase finished phase="size_tile_code" elapsed_ms=25 success=true
2026-09-11T17:58:07.981788Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: placing generated tile programs linked_end=319400 host_code_base=376832 host_code_bytes=860 generated_code_bytes=2688 exchange_table_bytes=20352 executable_ranges=[(377760, 524288)]
2026-09-11T17:58:07.981818Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: allocated package support memory linked_end=319400 profile_bytes=192 exchange_table_bytes=20352 host_code_bytes=860 host_data_bytes=656 generated_code_bytes=2688 code_address=377760 available_ranges=[(327680, 360448), (362864, 376832), (425984, 524288), (524480, 949168)]
2026-09-11T17:58:08.061422Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="place_storage"}: package build phase finished phase="place_storage" elapsed_ms=79 success=true
2026-09-11T17:58:08.096137Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T17:58:08.097908Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T17:58:08.097991Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:08.099750Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=4 transfers=2181 maximum_identical_destinations=1
2026-09-11T17:58:08.099822Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=4 initial_horizon=8173 selected_horizon=8173 endpoint_lower_bound=6912 lower_bound_gap=1261 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:08.101028Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T17:58:08.103726Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=4 tile=23 row_words=42 horizon=8173
2026-09-11T17:58:08.127557Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T17:58:08.172192Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T17:58:08.177001Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T17:58:08.177046Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:08.182574Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T17:58:08.605919Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T17:58:08.631356Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T17:58:08.631389Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:08.640893Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T17:58:08.713908Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T17:58:08.740036Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=9 transfers=43760 maximum_identical_destinations=1
2026-09-11T17:58:08.740085Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=9 initial_horizon=2347 selected_horizon=2347 endpoint_lower_bound=1960 lower_bound_gap=387 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:08.765838Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=9 tile=96 row_words=112 horizon=2347
2026-09-11T17:58:09.449758Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=7
2026-09-11T17:58:09.483537Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=7 transfers=66320 maximum_identical_destinations=1
2026-09-11T17:58:09.483574Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=7 initial_horizon=7349 selected_horizon=7349 endpoint_lower_bound=3240 lower_bound_gap=4109 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:09.514845Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=7 tile=966 row_words=285 horizon=7349
2026-09-11T17:58:10.056729Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=8 transfers=71168 maximum_identical_destinations=1
2026-09-11T17:58:10.056800Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=8 initial_horizon=13126 selected_horizon=13126 endpoint_lower_bound=8704 lower_bound_gap=4422 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:10.087637Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=8 tile=78 row_words=256 horizon=13126
2026-09-11T17:58:11.029783Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T17:58:11.057291Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T17:58:11.108448Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T17:58:11.108488Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:11.139658Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=6 transfers=32720 maximum_identical_destinations=1
2026-09-11T17:58:11.139693Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=6 initial_horizon=6489 selected_horizon=6489 endpoint_lower_bound=5796 lower_bound_gap=693 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:11.201952Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=6 tile=71 row_words=618 horizon=6489
2026-09-11T17:58:11.303410Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T17:58:15.929330Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=5 transfers=127912 maximum_identical_destinations=1
2026-09-11T17:58:15.929411Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=5 initial_horizon=11773 selected_horizon=11773 endpoint_lower_bound=6912 lower_bound_gap=4861 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:16.173112Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=5 tile=68 row_words=2686 horizon=11773
2026-09-11T17:58:16.200755Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: package build phase finished phase="lower_exchanges" elapsed_ms=8139 success=true
2026-09-11T17:58:18.233870Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T17:58:18.234929Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=4
2026-09-11T17:58:18.235653Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T17:58:18.235676Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:18.235984Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=4 transfers=2181 maximum_identical_destinations=1
2026-09-11T17:58:18.236006Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=4 initial_horizon=8173 selected_horizon=8173 endpoint_lower_bound=6912 lower_bound_gap=1261 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:18.237870Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=4 tile=23 row_words=42 horizon=8173
2026-09-11T17:58:18.237960Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T17:58:18.275351Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T17:58:18.299113Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T17:58:18.304480Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T17:58:18.304520Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:18.310182Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T17:58:18.680838Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T17:58:18.706940Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T17:58:18.706977Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:18.716617Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T17:58:18.853658Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T17:58:18.885413Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=9 transfers=43760 maximum_identical_destinations=1
2026-09-11T17:58:18.885454Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=9 initial_horizon=2347 selected_horizon=2347 endpoint_lower_bound=1960 lower_bound_gap=387 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:18.922230Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=9 tile=96 row_words=112 horizon=2347
2026-09-11T17:58:19.647166Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=8
2026-09-11T17:58:19.710059Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=8 transfers=71168 maximum_identical_destinations=1
2026-09-11T17:58:19.710115Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=8 initial_horizon=13126 selected_horizon=13126 endpoint_lower_bound=8704 lower_bound_gap=4422 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:19.751407Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=8 tile=78 row_words=256 horizon=13126
2026-09-11T17:58:20.626182Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=7 transfers=66320 maximum_identical_destinations=1
2026-09-11T17:58:20.626279Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=7 initial_horizon=5587 selected_horizon=5587 endpoint_lower_bound=3240 lower_bound_gap=2347 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:20.663692Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=7 tile=322 row_words=275 horizon=5587
2026-09-11T17:58:21.133557Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T17:58:21.212261Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T17:58:21.212302Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:21.360737Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T17:58:21.413070Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T17:58:21.446415Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=6 transfers=32720 maximum_identical_destinations=1
2026-09-11T17:58:21.446457Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=6 initial_horizon=6489 selected_horizon=6489 endpoint_lower_bound=5796 lower_bound_gap=693 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:21.521910Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=6 tile=71 row_words=618 horizon=6489
2026-09-11T17:58:22.106472Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=5
2026-09-11T17:58:22.171121Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=5 transfers=127912 maximum_identical_destinations=1
2026-09-11T17:58:22.171158Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=5 initial_horizon=11773 selected_horizon=11773 endpoint_lower_bound=6912 lower_bound_gap=4861 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:22.402036Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=5 tile=68 row_words=2686 horizon=11773
2026-09-11T17:58:22.458246Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: evaluated exchange placement candidate offset=20480 baseline_score=234793672704 score=115959472128 baseline_cycles=84112 candidate_cycles=82350 row_bytes=20112 row_capacity=32704 accepted=true
2026-09-11T17:58:22.560390Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: package build phase finished phase="optimize_exchange_placement" elapsed_ms=6359 success=true
2026-09-11T17:58:22.577977Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: costed final placed program final_cycles=262516 final_exchange=88950
2026-09-11T17:58:22.686061Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="prepare_tile_code"}: package build phase finished phase="prepare_tile_code" elapsed_ms=35 success=true
2026-09-11T17:58:22.714307Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="emit_tile_code"}: package build phase finished phase="emit_tile_code" elapsed_ms=28 success=true
2026-09-11T17:58:22.889345Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="build_tile_images"}: package build phase finished phase="build_tile_images" elapsed_ms=162 success=true
2026-09-11T17:58:22.957320Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: validated canonical baseline cycles=262516
2026-09-11T17:58:24.378611Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: screened tile mappings by exchange resource load candidates=139 baseline_cycles=70260 candidate_cycles=68802 baseline_pressure=46407 candidate_pressure=47959
2026-09-11T17:58:25.474486Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: screened exchange table geometry expansion_ms=791 expansion_and_footprint_ms=1044 estimated_row_bytes=29592 heuristic_row_bytes=38560 geometry_fragments_per_tile=3075 fragment_limit=16384
2026-09-11T17:58:25.498406Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: eliminated unread FP8 cast input padding clears removed=0
2026-09-11T17:58:25.605535Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T17:58:25.605593Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=2 initial_horizon=8004 selected_horizon=8004 endpoint_lower_bound=7872 lower_bound_gap=132 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:25.607691Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=2 tile=452 row_words=13 horizon=8004
2026-09-11T17:58:25.638534Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=4 transfers=2181 maximum_identical_destinations=1
2026-09-11T17:58:25.638587Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=4 initial_horizon=9408 selected_horizon=9408 endpoint_lower_bound=6912 lower_bound_gap=2496 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:25.640384Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=4 tile=20 row_words=42 horizon=9408
2026-09-11T17:58:25.799174Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T17:58:25.799253Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=10 initial_horizon=2459 selected_horizon=2459 endpoint_lower_bound=2304 lower_bound_gap=155 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:25.804767Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=10 tile=113 row_words=139 horizon=2459
2026-09-11T17:58:26.356339Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=9 transfers=43760 maximum_identical_destinations=1
2026-09-11T17:58:26.356401Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=9 initial_horizon=2357 selected_horizon=2357 endpoint_lower_bound=1960 lower_bound_gap=397 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:26.384838Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=9 tile=246 row_words=115 horizon=2357
2026-09-11T17:58:26.775484Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T17:58:26.775546Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=0 initial_horizon=14200 selected_horizon=14200 endpoint_lower_bound=14016 lower_bound_gap=184 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:26.787835Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=0 tile=63 row_words=166 horizon=14200
2026-09-11T17:58:27.073596Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=7 transfers=66320 maximum_identical_destinations=1
2026-09-11T17:58:27.073658Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=7 initial_horizon=7444 selected_horizon=7444 endpoint_lower_bound=3240 lower_bound_gap=4204 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:27.109163Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=7 tile=966 row_words=277 horizon=7444
2026-09-11T17:58:27.215121Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=8 transfers=71168 maximum_identical_destinations=1
2026-09-11T17:58:27.215234Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=8 initial_horizon=13224 selected_horizon=13224 endpoint_lower_bound=8704 lower_bound_gap=4520 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:27.268132Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=8 tile=1183 row_words=247 horizon=13224
2026-09-11T17:58:29.167909Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T17:58:29.167984Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=3 initial_horizon=4013 selected_horizon=4013 endpoint_lower_bound=3456 lower_bound_gap=557 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:29.368448Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=3 tile=321 row_words=1008 horizon=4013
2026-09-11T17:58:30.207688Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=5 transfers=127912 maximum_identical_destinations=1
2026-09-11T17:58:30.207759Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=5 initial_horizon=11478 selected_horizon=11478 endpoint_lower_bound=6912 lower_bound_gap=4566 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:30.452871Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=5 tile=82 row_words=2691 horizon=11478
2026-09-11T17:58:33.050544Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: compared ordinary and paired exchange schedules phase=6 candidates=6336 ordinary_horizon=6561 paired_horizon=7318 use_paired=false
2026-09-11T17:58:33.214924Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=6 transfers=32720 maximum_identical_destinations=1
2026-09-11T17:58:33.214981Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=6 initial_horizon=6561 selected_horizon=6561 endpoint_lower_bound=5796 lower_bound_gap=765 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:33.280020Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=6 tile=906 row_words=606 horizon=6561
2026-09-11T17:58:33.312221Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="plan_kernels"}: package build phase finished phase="plan_kernels" elapsed_ms=6 success=true
2026-09-11T17:58:33.313974Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="compile_kernels"}: package build phase finished phase="compile_kernels" elapsed_ms=1 success=true
2026-09-11T17:58:33.317597Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="link_runtime"}: package build phase finished phase="link_runtime" elapsed_ms=0 success=true
2026-09-11T17:58:33.349688Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: exchange table and repeat patch storage exchange_table_bytes=19728 maximum_uncompressed_repeat_patch_bytes=0 maximum_elided_arithmetic_patch_bytes=0
2026-09-11T17:58:33.493116Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="size_tile_code"}: package build phase finished phase="size_tile_code" elapsed_ms=26 success=true
2026-09-11T17:58:33.493262Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: placing generated tile programs linked_end=319400 host_code_base=376832 host_code_bytes=876 generated_code_bytes=2688 exchange_table_bytes=19728 executable_ranges=[(377776, 524288)]
2026-09-11T17:58:33.493295Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: allocated package support memory linked_end=319400 profile_bytes=192 exchange_table_bytes=19728 host_code_bytes=876 host_data_bytes=664 generated_code_bytes=2688 code_address=377776 available_ranges=[(327680, 360448), (362872, 376832), (425984, 524288), (524480, 949168)]
2026-09-11T17:58:33.561728Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="place_storage"}: package build phase finished phase="place_storage" elapsed_ms=68 success=true
2026-09-11T17:58:33.579281Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T17:58:33.580021Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T17:58:33.580040Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=2 initial_horizon=8004 selected_horizon=8004 endpoint_lower_bound=7872 lower_bound_gap=132 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:33.582310Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=2 tile=452 row_words=13 horizon=8004
2026-09-11T17:58:33.594659Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=4 transfers=2181 maximum_identical_destinations=1
2026-09-11T17:58:33.594710Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=4 initial_horizon=9408 selected_horizon=9408 endpoint_lower_bound=6912 lower_bound_gap=2496 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:33.596626Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=4 tile=20 row_words=42 horizon=9408
2026-09-11T17:58:33.708930Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T17:58:33.713933Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T17:58:33.713961Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=10 initial_horizon=2459 selected_horizon=2459 endpoint_lower_bound=2304 lower_bound_gap=155 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:33.719453Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=10 tile=113 row_words=139 horizon=2459
2026-09-11T17:58:34.192967Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T17:58:34.220474Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=9 transfers=43760 maximum_identical_destinations=1
2026-09-11T17:58:34.220512Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=9 initial_horizon=2357 selected_horizon=2357 endpoint_lower_bound=1960 lower_bound_gap=397 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:34.247302Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=9 tile=246 row_words=115 horizon=2357
2026-09-11T17:58:34.270055Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T17:58:34.826043Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=7
2026-09-11T17:58:34.865956Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=7 transfers=66320 maximum_identical_destinations=1
2026-09-11T17:58:34.865993Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=7 initial_horizon=7444 selected_horizon=7444 endpoint_lower_bound=3240 lower_bound_gap=4204 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:34.901014Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=7 tile=966 row_words=277 horizon=7444
2026-09-11T17:58:35.248550Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T17:58:35.278102Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T17:58:35.278143Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=0 initial_horizon=14200 selected_horizon=14200 endpoint_lower_bound=14016 lower_bound_gap=184 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:35.289836Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=0 tile=63 row_words=166 horizon=14200
2026-09-11T17:58:36.363261Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=8 transfers=71168 maximum_identical_destinations=1
2026-09-11T17:58:36.363322Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=8 initial_horizon=13224 selected_horizon=13224 endpoint_lower_bound=8704 lower_bound_gap=4520 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:36.407433Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=8 tile=1183 row_words=247 horizon=13224
2026-09-11T17:58:36.731016Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T17:58:36.816082Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=6 transfers=32720 maximum_identical_destinations=1
2026-09-11T17:58:36.816118Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=6 initial_horizon=6561 selected_horizon=6561 endpoint_lower_bound=5796 lower_bound_gap=765 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:36.873307Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=6 tile=906 row_words=606 horizon=6561
2026-09-11T17:58:37.778309Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T17:58:37.865912Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T17:58:37.865961Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=3 initial_horizon=4013 selected_horizon=4013 endpoint_lower_bound=3456 lower_bound_gap=557 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:38.056484Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=3 tile=321 row_words=1008 horizon=4013
2026-09-11T17:58:41.864386Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=5 transfers=127912 maximum_identical_destinations=1
2026-09-11T17:58:41.864480Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=5 initial_horizon=11456 selected_horizon=11456 endpoint_lower_bound=6912 lower_bound_gap=4544 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:42.113263Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=5 tile=82 row_words=2658 horizon=11456
2026-09-11T17:58:42.154258Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: package build phase finished phase="lower_exchanges" elapsed_ms=8592 success=true
2026-09-11T17:58:44.257897Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T17:58:44.306660Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=4
2026-09-11T17:58:44.308002Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=4 transfers=2181 maximum_identical_destinations=1
2026-09-11T17:58:44.308028Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=4 initial_horizon=9408 selected_horizon=9408 endpoint_lower_bound=6912 lower_bound_gap=2496 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:44.310426Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=4 tile=20 row_words=42 horizon=9408
2026-09-11T17:58:44.408872Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T17:58:44.415945Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T17:58:44.415981Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=10 initial_horizon=2459 selected_horizon=2459 endpoint_lower_bound=2304 lower_bound_gap=155 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:44.422228Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=10 tile=113 row_words=139 horizon=2459
2026-09-11T17:58:44.887803Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T17:58:44.915687Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=9 transfers=43760 maximum_identical_destinations=1
2026-09-11T17:58:44.915730Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=9 initial_horizon=2357 selected_horizon=2357 endpoint_lower_bound=1960 lower_bound_gap=397 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:44.943002Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=9 tile=246 row_words=115 horizon=2357
2026-09-11T17:58:44.967868Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T17:58:44.968759Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T17:58:44.968784Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=2 initial_horizon=8004 selected_horizon=8004 endpoint_lower_bound=7872 lower_bound_gap=132 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:44.971040Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=2 tile=452 row_words=13 horizon=8004
2026-09-11T17:58:45.676530Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=8
2026-09-11T17:58:45.721106Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=8 transfers=71168 maximum_identical_destinations=1
2026-09-11T17:58:45.721156Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=8 initial_horizon=13224 selected_horizon=13224 endpoint_lower_bound=8704 lower_bound_gap=4520 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:45.769849Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=8 tile=1183 row_words=247 horizon=13224
2026-09-11T17:58:46.712296Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=7 transfers=66320 maximum_identical_destinations=1
2026-09-11T17:58:46.712365Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=7 initial_horizon=5606 selected_horizon=5606 endpoint_lower_bound=3240 lower_bound_gap=2366 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:46.754533Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=7 tile=178 row_words=278 horizon=5606
2026-09-11T17:58:47.114960Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T17:58:47.200720Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T17:58:47.200776Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=3 initial_horizon=4013 selected_horizon=4013 endpoint_lower_bound=3456 lower_bound_gap=557 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:47.401294Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=3 tile=321 row_words=1008 horizon=4013
2026-09-11T17:58:47.431083Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T17:58:47.512928Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=6 transfers=32720 maximum_identical_destinations=1
2026-09-11T17:58:47.512973Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=6 initial_horizon=6561 selected_horizon=6561 endpoint_lower_bound=5796 lower_bound_gap=765 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:47.577315Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=6 tile=906 row_words=606 horizon=6561
2026-09-11T17:58:47.927778Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=5
2026-09-11T17:58:47.933851Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T17:58:47.970610Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T17:58:47.970659Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=0 initial_horizon=14200 selected_horizon=14200 endpoint_lower_bound=14016 lower_bound_gap=184 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:47.982875Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=0 tile=63 row_words=166 horizon=14200
2026-09-11T17:58:48.009464Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=5 transfers=127912 maximum_identical_destinations=1
2026-09-11T17:58:48.009510Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=5 initial_horizon=11456 selected_horizon=11456 endpoint_lower_bound=6912 lower_bound_gap=4544 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:48.249775Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=5 tile=82 row_words=2658 horizon=11456
2026-09-11T17:58:48.309983Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: evaluated exchange placement candidate offset=20480 baseline_score=234793672704 score=115959472128 baseline_cycles=85395 candidate_cycles=83557 row_bytes=19600 row_capacity=32704 accepted=true
2026-09-11T17:58:48.424450Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: package build phase finished phase="optimize_exchange_placement" elapsed_ms=6270 success=true
2026-09-11T17:58:48.430425Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: costed final placed program final_cycles=263723 final_exchange=90157
2026-09-11T17:58:48.546008Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="prepare_tile_code"}: package build phase finished phase="prepare_tile_code" elapsed_ms=38 success=true
2026-09-11T17:58:48.584584Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="emit_tile_code"}: package build phase finished phase="emit_tile_code" elapsed_ms=38 success=true
2026-09-11T17:58:48.761419Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="build_tile_images"}: package build phase finished phase="build_tile_images" elapsed_ms=156 success=true
2026-09-11T17:58:48.849233Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: retained incumbent tile mapping
2026-09-11T17:58:49.303877Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: evaluating ordered local candidates concurrently candidates=3 threads=16
2026-09-11T17:58:50.414246Z  INFO local_candidate{attempt=2}: screened exchange table geometry expansion_ms=905 expansion_and_footprint_ms=1110 estimated_row_bytes=22528 heuristic_row_bytes=39860 geometry_fragments_per_tile=2489 fragment_limit=16384
2026-09-11T17:58:50.428503Z  INFO local_candidate{attempt=2}: eliminated unread FP8 cast input padding clears removed=0
2026-09-11T17:58:50.469774Z  INFO local_candidate{attempt=1}: screened exchange table geometry expansion_ms=969 expansion_and_footprint_ms=1165 estimated_row_bytes=21808 heuristic_row_bytes=39860 geometry_fragments_per_tile=2431 fragment_limit=16384
2026-09-11T17:58:50.484293Z  INFO local_candidate{attempt=3}: screened exchange table geometry expansion_ms=900 expansion_and_footprint_ms=1180 estimated_row_bytes=29184 heuristic_row_bytes=36940 geometry_fragments_per_tile=3024 fragment_limit=16384
2026-09-11T17:58:50.486092Z  INFO local_candidate{attempt=1}: eliminated unread FP8 cast input padding clears removed=0
2026-09-11T17:58:50.503199Z  INFO local_candidate{attempt=3}: eliminated unread FP8 cast input padding clears removed=0
2026-09-11T17:58:50.532611Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=4 transfers=2181 maximum_identical_destinations=1
2026-09-11T17:58:50.532663Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=4 initial_horizon=8725 selected_horizon=8725 endpoint_lower_bound=6912 lower_bound_gap=1813 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:50.534296Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=4 tile=55 row_words=43 horizon=8725
2026-09-11T17:58:50.607925Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T17:58:50.607983Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:50.610068Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T17:58:50.645577Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T17:58:50.645636Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:50.654692Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T17:58:50.683016Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T17:58:50.683064Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:50.685057Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T17:58:50.702267Z  INFO local_candidate{attempt=1}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T17:58:50.702316Z  INFO local_candidate{attempt=1}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:50.704295Z  INFO local_candidate{attempt=1}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T17:58:50.797077Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T17:58:50.797121Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:50.802510Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T17:58:50.824606Z  INFO local_candidate{attempt=1}: prepared large physical exchange phase phase=4 transfers=2181 maximum_identical_destinations=1
2026-09-11T17:58:50.824638Z  INFO local_candidate{attempt=1}: optimized physical exchange schedule phase=4 initial_horizon=8725 selected_horizon=8725 endpoint_lower_bound=6912 lower_bound_gap=1813 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:50.826317Z  INFO local_candidate{attempt=1}: finished large physical exchange phase phase=4 tile=55 row_words=43 horizon=8725
2026-09-11T17:58:51.231157Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=9 transfers=43760 maximum_identical_destinations=1
2026-09-11T17:58:51.231236Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=9 initial_horizon=2347 selected_horizon=2347 endpoint_lower_bound=1960 lower_bound_gap=387 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:51.256328Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=9 tile=96 row_words=112 horizon=2347
2026-09-11T17:58:51.311500Z  INFO local_candidate{attempt=2}: compared ordinary and paired exchange schedules phase=0 candidates=2105 ordinary_horizon=14130 paired_horizon=18454 use_paired=false
2026-09-11T17:58:51.345392Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T17:58:51.345429Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:51.355239Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T17:58:51.368335Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=9 transfers=43760 maximum_identical_destinations=1
2026-09-11T17:58:51.368390Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=9 initial_horizon=2347 selected_horizon=2347 endpoint_lower_bound=1960 lower_bound_gap=387 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:51.384229Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=4 transfers=2182 maximum_identical_destinations=1
2026-09-11T17:58:51.384262Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=4 initial_horizon=7563 selected_horizon=7563 endpoint_lower_bound=5184 lower_bound_gap=2379 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:51.386266Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=4 tile=30 row_words=40 horizon=7563
2026-09-11T17:58:51.391812Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=9 tile=96 row_words=112 horizon=2347
2026-09-11T17:58:51.819422Z  INFO local_candidate{attempt=1}: compared ordinary and paired exchange schedules phase=0 candidates=2105 ordinary_horizon=14130 paired_horizon=18454 use_paired=false
2026-09-11T17:58:51.862272Z  INFO local_candidate{attempt=1}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T17:58:51.862316Z  INFO local_candidate{attempt=1}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:51.879460Z  INFO local_candidate{attempt=1}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T17:58:51.961266Z  INFO local_candidate{attempt=1}: prepared large physical exchange phase phase=9 transfers=43760 maximum_identical_destinations=1
2026-09-11T17:58:51.961324Z  INFO local_candidate{attempt=1}: optimized physical exchange schedule phase=9 initial_horizon=2347 selected_horizon=2347 endpoint_lower_bound=1960 lower_bound_gap=387 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:51.980447Z  INFO local_candidate{attempt=1}: finished large physical exchange phase phase=9 tile=96 row_words=112 horizon=2347
2026-09-11T17:58:51.991319Z  INFO local_candidate{attempt=1}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T17:58:51.991363Z  INFO local_candidate{attempt=1}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:51.997040Z  INFO local_candidate{attempt=1}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T17:58:52.059449Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=7 transfers=66320 maximum_identical_destinations=1
2026-09-11T17:58:52.059523Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=7 initial_horizon=7349 selected_horizon=7349 endpoint_lower_bound=3240 lower_bound_gap=4109 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:52.095821Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=7 tile=966 row_words=285 horizon=7349
2026-09-11T17:58:52.115550Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=8 transfers=71168 maximum_identical_destinations=1
2026-09-11T17:58:52.115612Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=8 initial_horizon=13126 selected_horizon=13126 endpoint_lower_bound=8704 lower_bound_gap=4422 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:52.119580Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=7 transfers=66320 maximum_identical_destinations=1
2026-09-11T17:58:52.119638Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=7 initial_horizon=7349 selected_horizon=7349 endpoint_lower_bound=3240 lower_bound_gap=4109 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:52.163729Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=8 tile=78 row_words=256 horizon=13126
2026-09-11T17:58:52.165845Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=7 tile=966 row_words=285 horizon=7349
2026-09-11T17:58:52.411896Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=8 transfers=71168 maximum_identical_destinations=1
2026-09-11T17:58:52.411968Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=8 initial_horizon=13126 selected_horizon=13126 endpoint_lower_bound=8704 lower_bound_gap=4422 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:52.462029Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=8 tile=79 row_words=262 horizon=13126
2026-09-11T17:58:52.490260Z  INFO local_candidate{attempt=1}: prepared large physical exchange phase phase=8 transfers=71168 maximum_identical_destinations=1
2026-09-11T17:58:52.490318Z  INFO local_candidate{attempt=1}: optimized physical exchange schedule phase=8 initial_horizon=13126 selected_horizon=13126 endpoint_lower_bound=8704 lower_bound_gap=4422 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:52.541859Z  INFO local_candidate{attempt=1}: finished large physical exchange phase phase=8 tile=78 row_words=256 horizon=13126
2026-09-11T17:58:53.118882Z  INFO local_candidate{attempt=1}: prepared large physical exchange phase phase=7 transfers=66320 maximum_identical_destinations=1
2026-09-11T17:58:53.118958Z  INFO local_candidate{attempt=1}: optimized physical exchange schedule phase=7 initial_horizon=7349 selected_horizon=7349 endpoint_lower_bound=3240 lower_bound_gap=4109 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:53.149232Z  INFO local_candidate{attempt=1}: finished large physical exchange phase phase=7 tile=966 row_words=285 horizon=7349
2026-09-11T17:58:53.670046Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=6 transfers=33198 maximum_identical_destinations=1
2026-09-11T17:58:53.670117Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=6 initial_horizon=12787 selected_horizon=12787 endpoint_lower_bound=11940 lower_bound_gap=847 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:53.734719Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=6 tile=74 row_words=599 horizon=12787
2026-09-11T17:58:53.887843Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=6 transfers=32720 maximum_identical_destinations=1
2026-09-11T17:58:53.887909Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=6 initial_horizon=6489 selected_horizon=6489 endpoint_lower_bound=5796 lower_bound_gap=693 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:53.958374Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T17:58:53.958435Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:53.961191Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=6 tile=71 row_words=618 horizon=6489
2026-09-11T17:58:53.995981Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T17:58:53.996040Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:54.159588Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T17:58:54.205228Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T17:58:54.314467Z  INFO local_candidate{attempt=1}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T17:58:54.314550Z  INFO local_candidate{attempt=1}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:54.522769Z  INFO local_candidate{attempt=1}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T17:58:54.701444Z  INFO local_candidate{attempt=1}: prepared large physical exchange phase phase=6 transfers=33676 maximum_identical_destinations=1
2026-09-11T17:58:54.701518Z  INFO local_candidate{attempt=1}: optimized physical exchange schedule phase=6 initial_horizon=12637 selected_horizon=12637 endpoint_lower_bound=11940 lower_bound_gap=697 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:54.777584Z  INFO local_candidate{attempt=1}: prepared large physical exchange phase phase=5 transfers=128156 maximum_identical_destinations=1
2026-09-11T17:58:54.777647Z  INFO local_candidate{attempt=1}: optimized physical exchange schedule phase=5 initial_horizon=8460 selected_horizon=8460 endpoint_lower_bound=6912 lower_bound_gap=1548 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:54.790193Z  INFO local_candidate{attempt=1}: finished large physical exchange phase phase=6 tile=79 row_words=630 horizon=12637
2026-09-11T17:58:54.970457Z  INFO local_candidate{attempt=1}: finished large physical exchange phase phase=5 tile=154 row_words=1096 horizon=8460
2026-09-11T17:58:55.003064Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="plan_kernels"}: package build phase finished phase="plan_kernels" elapsed_ms=5 success=true
2026-09-11T17:58:55.004946Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="compile_kernels"}: package build phase finished phase="compile_kernels" elapsed_ms=1 success=true
2026-09-11T17:58:55.007095Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="link_runtime"}: package build phase finished phase="link_runtime" elapsed_ms=0 success=true
2026-09-11T17:58:55.035870Z  INFO local_candidate{attempt=1}: exchange table and repeat patch storage exchange_table_bytes=13816 maximum_uncompressed_repeat_patch_bytes=0 maximum_elided_arithmetic_patch_bytes=0
2026-09-11T17:58:55.067269Z  INFO local_candidate{attempt=3}: compared ordinary and paired exchange schedules phase=0 candidates=2105 ordinary_horizon=14130 paired_horizon=18454 use_paired=false
2026-09-11T17:58:55.116603Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T17:58:55.116643Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:55.128972Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T17:58:55.192481Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="size_tile_code"}: package build phase finished phase="size_tile_code" elapsed_ms=29 success=true
2026-09-11T17:58:55.192528Z  INFO local_candidate{attempt=1}: placing generated tile programs linked_end=319976 host_code_base=376832 host_code_bytes=876 generated_code_bytes=2724 exchange_table_bytes=13816 executable_ranges=[(377776, 524288)]
2026-09-11T17:58:55.192545Z  INFO local_candidate{attempt=1}: allocated package support memory linked_end=319976 profile_bytes=200 exchange_table_bytes=13816 host_code_bytes=876 host_data_bytes=664 generated_code_bytes=2724 code_address=377776 available_ranges=[(327680, 360448), (362872, 376832), (409600, 524288), (524488, 949168)]
2026-09-11T17:58:55.265265Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="place_storage"}: package build phase finished phase="place_storage" elapsed_ms=72 success=true
2026-09-11T17:58:55.277870Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=5 transfers=128104 maximum_identical_destinations=1
2026-09-11T17:58:55.277926Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=5 initial_horizon=9031 selected_horizon=9031 endpoint_lower_bound=6912 lower_bound_gap=2119 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:55.280977Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T17:58:55.285716Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T17:58:55.286552Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T17:58:55.286576Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:55.289412Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T17:58:55.304508Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=4 transfers=2181 maximum_identical_destinations=1
2026-09-11T17:58:55.304559Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=4 initial_horizon=8725 selected_horizon=8725 endpoint_lower_bound=6912 lower_bound_gap=1813 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:55.306373Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=4 tile=55 row_words=43 horizon=8725
2026-09-11T17:58:55.341032Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T17:58:55.346289Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T17:58:55.346315Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:55.352025Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T17:58:55.486332Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=5 tile=159 row_words=1279 horizon=9031
2026-09-11T17:58:55.981611Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T17:58:56.011997Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=9 transfers=43760 maximum_identical_destinations=1
2026-09-11T17:58:56.012053Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=9 initial_horizon=2347 selected_horizon=2347 endpoint_lower_bound=1960 lower_bound_gap=387 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:56.037661Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=9 tile=96 row_words=112 horizon=2347
2026-09-11T17:58:56.465516Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=5 transfers=127912 maximum_identical_destinations=1
2026-09-11T17:58:56.465581Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=5 initial_horizon=9702 selected_horizon=9702 endpoint_lower_bound=6600 lower_bound_gap=3102 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:56.636827Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=7
2026-09-11T17:58:56.675849Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=7 transfers=66320 maximum_identical_destinations=1
2026-09-11T17:58:56.675900Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=7 initial_horizon=7349 selected_horizon=7349 endpoint_lower_bound=3240 lower_bound_gap=4109 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:56.677149Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=5 tile=65 row_words=2640 horizon=9702
2026-09-11T17:58:56.711879Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=7 tile=966 row_words=285 horizon=7349
2026-09-11T17:58:56.768403Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=8
2026-09-11T17:58:56.827440Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=8 transfers=71168 maximum_identical_destinations=1
2026-09-11T17:58:56.827489Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=8 initial_horizon=13126 selected_horizon=13126 endpoint_lower_bound=8704 lower_bound_gap=4422 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:56.872803Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=8 tile=78 row_words=256 horizon=13126
2026-09-11T17:58:57.149992Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T17:58:57.179788Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T17:58:57.179848Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:57.191418Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T17:58:58.247067Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T17:58:58.347802Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T17:58:58.347852Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:58.567837Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T17:58:58.604675Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=5
2026-09-11T17:58:58.605746Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="plan_kernels"}: package build phase finished phase="plan_kernels" elapsed_ms=5 success=true
2026-09-11T17:58:58.606689Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="plan_kernels"}: package build phase finished phase="plan_kernels" elapsed_ms=5 success=true
2026-09-11T17:58:58.607808Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="compile_kernels"}: package build phase finished phase="compile_kernels" elapsed_ms=1 success=true
2026-09-11T17:58:58.608476Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="compile_kernels"}: package build phase finished phase="compile_kernels" elapsed_ms=1 success=true
2026-09-11T17:58:58.609950Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="link_runtime"}: package build phase finished phase="link_runtime" elapsed_ms=0 success=true
2026-09-11T17:58:58.610742Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="link_runtime"}: package build phase finished phase="link_runtime" elapsed_ms=0 success=true
2026-09-11T17:58:58.648681Z  INFO local_candidate{attempt=2}: exchange table and repeat patch storage exchange_table_bytes=14304 maximum_uncompressed_repeat_patch_bytes=0 maximum_elided_arithmetic_patch_bytes=0
2026-09-11T17:58:58.650722Z  INFO local_candidate{attempt=3}: exchange table and repeat patch storage exchange_table_bytes=19896 maximum_uncompressed_repeat_patch_bytes=0 maximum_elided_arithmetic_patch_bytes=0
2026-09-11T17:58:58.697818Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=5 transfers=128156 maximum_identical_destinations=1
2026-09-11T17:58:58.697858Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=5 initial_horizon=8460 selected_horizon=8460 endpoint_lower_bound=6912 lower_bound_gap=1548 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:58.703424Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T17:58:58.808953Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=6 transfers=33676 maximum_identical_destinations=1
2026-09-11T17:58:58.809025Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=6 initial_horizon=12637 selected_horizon=12637 endpoint_lower_bound=11940 lower_bound_gap=697 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:58.831225Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="size_tile_code"}: package build phase finished phase="size_tile_code" elapsed_ms=55 success=true
2026-09-11T17:58:58.831280Z  INFO local_candidate{attempt=2}: placing generated tile programs linked_end=319976 host_code_base=376832 host_code_bytes=876 generated_code_bytes=2724 exchange_table_bytes=14304 executable_ranges=[(377776, 524288)]
2026-09-11T17:58:58.831282Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="size_tile_code"}: package build phase finished phase="size_tile_code" elapsed_ms=61 success=true
2026-09-11T17:58:58.831297Z  INFO local_candidate{attempt=2}: allocated package support memory linked_end=319976 profile_bytes=200 exchange_table_bytes=14304 host_code_bytes=876 host_data_bytes=664 generated_code_bytes=2724 code_address=377776 available_ranges=[(327680, 360448), (362872, 376832), (409600, 524288), (524488, 949168)]
2026-09-11T17:58:58.831329Z  INFO local_candidate{attempt=3}: placing generated tile programs linked_end=319400 host_code_base=376832 host_code_bytes=860 generated_code_bytes=2608 exchange_table_bytes=19896 executable_ranges=[(377760, 524288)]
2026-09-11T17:58:58.831346Z  INFO local_candidate{attempt=3}: allocated package support memory linked_end=319400 profile_bytes=192 exchange_table_bytes=19896 host_code_bytes=860 host_data_bytes=656 generated_code_bytes=2608 code_address=377760 available_ranges=[(327680, 360448), (362864, 376832), (425984, 524288), (524480, 949168)]
2026-09-11T17:58:58.885073Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=6 tile=79 row_words=630 horizon=12637
2026-09-11T17:58:58.891904Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=5 tile=154 row_words=1096 horizon=8460
2026-09-11T17:58:58.916311Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="place_storage"}: package build phase finished phase="place_storage" elapsed_ms=84 success=true
2026-09-11T17:58:58.917743Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="place_storage"}: package build phase finished phase="place_storage" elapsed_ms=86 success=true
2026-09-11T17:58:58.932154Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T17:58:58.932171Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T17:58:58.932805Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T17:58:58.932828Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:58.934922Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T17:58:58.960520Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T17:58:58.961044Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T17:58:58.961059Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:58.963571Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T17:58:58.963783Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T17:58:59.004731Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=4 transfers=2181 maximum_identical_destinations=1
2026-09-11T17:58:59.004787Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=4 initial_horizon=8725 selected_horizon=8725 endpoint_lower_bound=6912 lower_bound_gap=1813 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:59.006436Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=4 tile=55 row_words=43 horizon=8725
2026-09-11T17:58:59.045958Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T17:58:59.052180Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T17:58:59.052232Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:59.059068Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T17:58:59.373060Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T17:58:59.400578Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T17:58:59.400620Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:59.411842Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T17:58:59.569523Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T17:58:59.590984Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=9 transfers=43760 maximum_identical_destinations=1
2026-09-11T17:58:59.591025Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=9 initial_horizon=2347 selected_horizon=2347 endpoint_lower_bound=1960 lower_bound_gap=387 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:59.616171Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=9 tile=96 row_words=112 horizon=2347
2026-09-11T17:58:59.697188Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T17:58:59.710814Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T17:58:59.710846Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:59.717188Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T17:59:00.286679Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=7
2026-09-11T17:59:00.331333Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=7 transfers=66320 maximum_identical_destinations=1
2026-09-11T17:59:00.331376Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=7 initial_horizon=7349 selected_horizon=7349 endpoint_lower_bound=3240 lower_bound_gap=4109 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:00.364088Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=7 tile=966 row_words=285 horizon=7349
2026-09-11T17:59:00.379113Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: package build phase finished phase="lower_exchanges" elapsed_ms=5113 success=true
2026-09-11T17:59:00.402281Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=4
2026-09-11T17:59:00.403659Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=4 transfers=2182 maximum_identical_destinations=1
2026-09-11T17:59:00.403680Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=4 initial_horizon=7563 selected_horizon=7563 endpoint_lower_bound=5184 lower_bound_gap=2379 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:00.406637Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=4 tile=30 row_words=40 horizon=7563
2026-09-11T17:59:01.033253Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T17:59:01.091748Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=9 transfers=43760 maximum_identical_destinations=1
2026-09-11T17:59:01.091812Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=9 initial_horizon=2347 selected_horizon=2347 endpoint_lower_bound=1960 lower_bound_gap=387 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:01.120513Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=9 tile=96 row_words=112 horizon=2347
2026-09-11T17:59:01.769795Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=8
2026-09-11T17:59:01.816804Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=8 transfers=71168 maximum_identical_destinations=1
2026-09-11T17:59:01.816848Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=8 initial_horizon=13126 selected_horizon=13126 endpoint_lower_bound=8704 lower_bound_gap=4422 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:01.858873Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=8 tile=78 row_words=256 horizon=13126
2026-09-11T17:59:02.067248Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T17:59:02.161717Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=6 transfers=33198 maximum_identical_destinations=1
2026-09-11T17:59:02.161768Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=6 initial_horizon=12787 selected_horizon=12787 endpoint_lower_bound=11940 lower_bound_gap=847 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:02.194049Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T17:59:02.231941Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=6 tile=74 row_words=599 horizon=12787
2026-09-11T17:59:02.282157Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=6 transfers=32720 maximum_identical_destinations=1
2026-09-11T17:59:02.282233Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=6 initial_horizon=6489 selected_horizon=6489 endpoint_lower_bound=5796 lower_bound_gap=693 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:02.356495Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=6 tile=71 row_words=618 horizon=6489
2026-09-11T17:59:02.624983Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T17:59:02.629437Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=4
2026-09-11T17:59:02.630526Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=4 transfers=2181 maximum_identical_destinations=1
2026-09-11T17:59:02.630559Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=4 initial_horizon=8725 selected_horizon=8725 endpoint_lower_bound=6912 lower_bound_gap=1813 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:02.632474Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=4 tile=55 row_words=43 horizon=8725
2026-09-11T17:59:02.677350Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T17:59:02.678952Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T17:59:02.679007Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:02.682775Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T17:59:02.738173Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T17:59:02.744025Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T17:59:02.744061Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:02.750394Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T17:59:03.278253Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T17:59:03.278413Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T17:59:03.306481Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=9 transfers=43760 maximum_identical_destinations=1
2026-09-11T17:59:03.306523Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=9 initial_horizon=2347 selected_horizon=2347 endpoint_lower_bound=1960 lower_bound_gap=387 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:03.332725Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T17:59:03.345251Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=9 tile=96 row_words=112 horizon=2347
2026-09-11T17:59:03.416644Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T17:59:03.416697Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:03.445779Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T17:59:03.445827Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:03.611281Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T17:59:03.642264Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T17:59:03.903963Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=8
2026-09-11T17:59:03.956533Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=8 transfers=71168 maximum_identical_destinations=1
2026-09-11T17:59:03.956596Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=8 initial_horizon=13126 selected_horizon=13126 endpoint_lower_bound=8704 lower_bound_gap=4422 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:03.993647Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=8 tile=78 row_words=256 horizon=13126
2026-09-11T17:59:04.405582Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=5
2026-09-11T17:59:04.523238Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=5 transfers=128104 maximum_identical_destinations=1
2026-09-11T17:59:04.523306Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=5 initial_horizon=9031 selected_horizon=9031 endpoint_lower_bound=6912 lower_bound_gap=2119 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:04.734788Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=5 tile=159 row_words=1279 horizon=9031
2026-09-11T17:59:04.957379Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=8 transfers=71168 maximum_identical_destinations=1
2026-09-11T17:59:04.957470Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=8 initial_horizon=13126 selected_horizon=13126 endpoint_lower_bound=8704 lower_bound_gap=4422 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:59:05.010410Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=8 tile=78 row_words=256 horizon=13126
2026-09-11T17:59:05.132098Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=7
2026-09-11T17:59:05.176095Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=7 transfers=66320 maximum_identical_destinations=1
2026-09-11T17:59:05.176136Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=7 initial_horizon=7349 selected_horizon=7349 endpoint_lower_bound=3240 lower_bound_gap=4109 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:05.221972Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=7 tile=966 row_words=285 horizon=7349
2026-09-11T17:59:05.695492Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T17:59:05.728793Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T17:59:05.728838Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:05.740789Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T17:59:05.956298Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=7 transfers=66320 maximum_identical_destinations=1
2026-09-11T17:59:05.956365Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=7 initial_horizon=5587 selected_horizon=5587 endpoint_lower_bound=3240 lower_bound_gap=2347 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:59:05.998702Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=7 tile=322 row_words=275 horizon=5587
2026-09-11T17:59:06.009597Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=5
2026-09-11T17:59:06.138721Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T17:59:06.148499Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=5 transfers=128156 maximum_identical_destinations=1
2026-09-11T17:59:06.148553Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=5 initial_horizon=8460 selected_horizon=8460 endpoint_lower_bound=6912 lower_bound_gap=1548 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:06.243961Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=6 transfers=33676 maximum_identical_destinations=1
2026-09-11T17:59:06.244017Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=6 initial_horizon=12637 selected_horizon=12637 endpoint_lower_bound=11940 lower_bound_gap=697 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:06.325231Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=6 tile=79 row_words=630 horizon=12637
2026-09-11T17:59:06.354022Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=5 tile=154 row_words=1096 horizon=8460
2026-09-11T17:59:06.383609Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: package build phase finished phase="lower_exchanges" elapsed_ms=7465 success=true
2026-09-11T17:59:06.497840Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T17:59:06.532552Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T17:59:06.532600Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:06.542380Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T17:59:06.546443Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T17:59:06.635317Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T17:59:06.635357Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:06.832082Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T17:59:06.904627Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: evaluated exchange placement candidate offset=20480 baseline_score=233017539584 score=114183339008 baseline_cycles=87499 candidate_cycles=85737 row_bytes=13784 row_capacity=16320 accepted=true
2026-09-11T17:59:07.027169Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: package build phase finished phase="optimize_exchange_placement" elapsed_ms=6647 success=true
2026-09-11T17:59:07.034669Z  INFO local_candidate{attempt=1}: costed final placed program final_cycles=245567 final_exchange=92337
2026-09-11T17:59:07.170197Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="prepare_tile_code"}: package build phase finished phase="prepare_tile_code" elapsed_ms=57 success=true
2026-09-11T17:59:07.205410Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="emit_tile_code"}: package build phase finished phase="emit_tile_code" elapsed_ms=35 success=true
2026-09-11T17:59:07.396886Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="build_tile_images"}: package build phase finished phase="build_tile_images" elapsed_ms=166 success=true
2026-09-11T17:59:08.764193Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T17:59:08.765469Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T17:59:08.765508Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:08.768967Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T17:59:08.781037Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=4
2026-09-11T17:59:08.781974Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=4 transfers=2181 maximum_identical_destinations=1
2026-09-11T17:59:08.781995Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=4 initial_horizon=8725 selected_horizon=8725 endpoint_lower_bound=6912 lower_bound_gap=1813 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:08.783804Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=4 tile=55 row_words=43 horizon=8725
2026-09-11T17:59:08.821669Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T17:59:08.827897Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T17:59:08.827929Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:08.834886Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T17:59:09.191866Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T17:59:09.222082Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T17:59:09.222121Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:09.233458Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T17:59:09.405280Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T17:59:09.433153Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=9 transfers=43760 maximum_identical_destinations=1
2026-09-11T17:59:09.433183Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=9 initial_horizon=2347 selected_horizon=2347 endpoint_lower_bound=1960 lower_bound_gap=387 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:09.460257Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=9 tile=96 row_words=112 horizon=2347
2026-09-11T17:59:11.146450Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=7 transfers=66320 maximum_identical_destinations=1
2026-09-11T17:59:11.146516Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=7 initial_horizon=5587 selected_horizon=5587 endpoint_lower_bound=3240 lower_bound_gap=2347 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:59:11.186407Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=7 tile=322 row_words=275 horizon=5587
2026-09-11T17:59:11.233268Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T17:59:11.664297Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T17:59:11.767106Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T17:59:11.803718Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T17:59:11.803768Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:11.853298Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=6 transfers=33198 maximum_identical_destinations=1
2026-09-11T17:59:11.853337Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=6 initial_horizon=12787 selected_horizon=12787 endpoint_lower_bound=11940 lower_bound_gap=847 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:11.922634Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=6 tile=74 row_words=599 horizon=12787
2026-09-11T17:59:12.001462Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T17:59:12.587854Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=8
2026-09-11T17:59:12.633578Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=8 transfers=71168 maximum_identical_destinations=1
2026-09-11T17:59:12.633625Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=8 initial_horizon=13126 selected_horizon=13126 endpoint_lower_bound=8704 lower_bound_gap=4422 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:12.685118Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=8 tile=78 row_words=256 horizon=13126
2026-09-11T17:59:14.983977Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=5 transfers=127912 maximum_identical_destinations=1
2026-09-11T17:59:14.984043Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=5 initial_horizon=9681 selected_horizon=9681 endpoint_lower_bound=6600 lower_bound_gap=3081 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:59:15.055565Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=5
2026-09-11T17:59:15.142815Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=5 transfers=128104 maximum_identical_destinations=1
2026-09-11T17:59:15.142869Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=5 initial_horizon=9031 selected_horizon=9031 endpoint_lower_bound=6912 lower_bound_gap=2119 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:15.189972Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=5 tile=68 row_words=2655 horizon=9681
2026-09-11T17:59:15.230839Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: package build phase finished phase="lower_exchanges" elapsed_ms=16314 success=true
2026-09-11T17:59:15.354102Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=5 tile=159 row_words=1279 horizon=9031
2026-09-11T17:59:15.410343Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: evaluated exchange placement candidate offset=20480 baseline_score=235884891136 score=117050690560 baseline_cycles=88220 candidate_cycles=86458 row_bytes=14272 row_capacity=16320 accepted=true
2026-09-11T17:59:15.654955Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: package build phase finished phase="optimize_exchange_placement" elapsed_ms=9271 success=true
2026-09-11T17:59:15.662956Z  INFO local_candidate{attempt=2}: costed final placed program final_cycles=248344 final_exchange=93058
2026-09-11T17:59:15.785949Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="prepare_tile_code"}: package build phase finished phase="prepare_tile_code" elapsed_ms=43 success=true
2026-09-11T17:59:15.818309Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="emit_tile_code"}: package build phase finished phase="emit_tile_code" elapsed_ms=32 success=true
2026-09-11T17:59:16.013588Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="build_tile_images"}: package build phase finished phase="build_tile_images" elapsed_ms=177 success=true
2026-09-11T17:59:17.689074Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T17:59:17.696772Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T17:59:17.699857Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T17:59:17.699886Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:17.700564Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=4
2026-09-11T17:59:17.701765Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=4 transfers=2182 maximum_identical_destinations=1
2026-09-11T17:59:17.701794Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=4 initial_horizon=7563 selected_horizon=7563 endpoint_lower_bound=5184 lower_bound_gap=2379 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:17.702756Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T17:59:17.704132Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=4 tile=30 row_words=40 horizon=7563
2026-09-11T17:59:17.788279Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T17:59:17.795176Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T17:59:17.795231Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:17.802192Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T17:59:18.079752Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T17:59:18.100513Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T17:59:18.100544Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:18.108322Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T17:59:18.335799Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T17:59:18.361534Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=9 transfers=43760 maximum_identical_destinations=1
2026-09-11T17:59:18.361571Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=9 initial_horizon=2347 selected_horizon=2347 endpoint_lower_bound=1960 lower_bound_gap=387 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:18.387538Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=9 tile=96 row_words=112 horizon=2347
2026-09-11T17:59:19.110608Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=8
2026-09-11T17:59:19.151611Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=8 transfers=71168 maximum_identical_destinations=1
2026-09-11T17:59:19.151651Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=8 initial_horizon=13126 selected_horizon=13126 endpoint_lower_bound=8704 lower_bound_gap=4422 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:19.194269Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=8 tile=78 row_words=256 horizon=13126
2026-09-11T17:59:20.043070Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T17:59:20.130984Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=6 transfers=32720 maximum_identical_destinations=1
2026-09-11T17:59:20.131054Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=6 initial_horizon=6489 selected_horizon=6489 endpoint_lower_bound=5796 lower_bound_gap=693 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:20.204039Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=6 tile=71 row_words=618 horizon=6489
2026-09-11T17:59:20.213916Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=7 transfers=66320 maximum_identical_destinations=1
2026-09-11T17:59:20.213963Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=7 initial_horizon=5587 selected_horizon=5587 endpoint_lower_bound=3240 lower_bound_gap=2347 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:59:20.255933Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=7 tile=322 row_words=275 horizon=5587
2026-09-11T17:59:20.786871Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T17:59:20.898359Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T17:59:20.898415Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:21.103675Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T17:59:24.431095Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=5
2026-09-11T17:59:24.519079Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=5 transfers=127912 maximum_identical_destinations=1
2026-09-11T17:59:24.519129Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=5 initial_horizon=9681 selected_horizon=9681 endpoint_lower_bound=6600 lower_bound_gap=3081 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:24.720924Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=5 tile=68 row_words=2655 horizon=9681
2026-09-11T17:59:24.792745Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: evaluated exchange placement candidate offset=20480 baseline_score=239055910912 score=120221710336 baseline_cycles=81410 candidate_cycles=79648 row_bytes=19768 row_capacity=32704 accepted=true
2026-09-11T17:59:24.967532Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: package build phase finished phase="optimize_exchange_placement" elapsed_ms=9736 success=true
2026-09-11T17:59:24.975376Z  INFO local_candidate{attempt=3}: costed final placed program final_cycles=258320 final_exchange=86248
2026-09-11T17:59:25.097469Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="prepare_tile_code"}: package build phase finished phase="prepare_tile_code" elapsed_ms=41 success=true
2026-09-11T17:59:25.131515Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="emit_tile_code"}: package build phase finished phase="emit_tile_code" elapsed_ms=33 success=true
2026-09-11T17:59:25.320563Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="build_tile_images"}: package build phase finished phase="build_tile_images" elapsed_ms=168 success=true
2026-09-11T17:59:25.726354Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: accepted local layout improvement attempt=1 before=262516 after=245567 changed_operations=[] opened_boundaries=[]
2026-09-11T17:59:26.286616Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: evaluating ordered local candidates concurrently candidates=2 threads=16
2026-09-11T17:59:27.516334Z  INFO local_candidate{attempt=2}: screened exchange table geometry expansion_ms=934 expansion_and_footprint_ms=1229 estimated_row_bytes=21400 heuristic_row_bytes=38240 geometry_fragments_per_tile=2380 fragment_limit=16384
2026-09-11T17:59:27.537343Z  INFO local_candidate{attempt=2}: eliminated unread FP8 cast input padding clears removed=0
2026-09-11T17:59:27.640733Z  INFO local_candidate{attempt=2}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T17:59:27.641568Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T17:59:27.641592Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:27.642973Z  INFO local_candidate{attempt=2}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T17:59:27.644184Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T17:59:27.670514Z  INFO local_candidate{attempt=3}: screened exchange table geometry expansion_ms=1071 expansion_and_footprint_ms=1383 estimated_row_bytes=19864 heuristic_row_bytes=38240 geometry_fragments_per_tile=2188 fragment_limit=16384
2026-09-11T17:59:27.670568Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=4 transfers=2182 maximum_identical_destinations=1
2026-09-11T17:59:27.670607Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=4 initial_horizon=7563 selected_horizon=7563 endpoint_lower_bound=5184 lower_bound_gap=2379 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:59:27.672831Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=4 tile=134 row_words=39 horizon=7563
2026-09-11T17:59:27.693423Z  INFO local_candidate{attempt=3}: eliminated unread FP8 cast input padding clears removed=0
2026-09-11T17:59:27.806570Z  INFO local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T17:59:27.808934Z  INFO local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T17:59:27.810925Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T17:59:27.810948Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:27.813283Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T17:59:27.822050Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=4 transfers=2182 maximum_identical_destinations=1
2026-09-11T17:59:27.822117Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=4 initial_horizon=7214 selected_horizon=7214 endpoint_lower_bound=5184 lower_bound_gap=2030 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:59:27.826052Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=4 tile=165 row_words=39 horizon=7214
2026-09-11T17:59:27.947836Z  INFO local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T17:59:27.953147Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T17:59:27.953176Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:27.959129Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T17:59:28.263585Z  INFO local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T17:59:28.289576Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T17:59:28.289616Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:28.294815Z  INFO local_candidate{attempt=2}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T17:59:28.300792Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T17:59:28.336409Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=9 transfers=43760 maximum_identical_destinations=1
2026-09-11T17:59:28.336446Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=9 initial_horizon=2347 selected_horizon=2347 endpoint_lower_bound=1960 lower_bound_gap=387 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:28.364870Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=9 tile=96 row_words=112 horizon=2347
2026-09-11T17:59:28.444150Z  INFO local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T17:59:28.465142Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=9 transfers=43760 maximum_identical_destinations=1
2026-09-11T17:59:28.465175Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=9 initial_horizon=2347 selected_horizon=2347 endpoint_lower_bound=1960 lower_bound_gap=387 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:28.493891Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=9 tile=96 row_words=112 horizon=2347
2026-09-11T17:59:28.920336Z  INFO local_candidate{attempt=2}: reused exchange optimization after validating relocated rows phase=7
2026-09-11T17:59:28.977756Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=7 transfers=66320 maximum_identical_destinations=1
2026-09-11T17:59:28.977802Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=7 initial_horizon=7349 selected_horizon=7349 endpoint_lower_bound=3240 lower_bound_gap=4109 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:29.011918Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=7 tile=966 row_words=285 horizon=7349
2026-09-11T17:59:29.097407Z  INFO local_candidate{attempt=2}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T17:59:29.104374Z  INFO local_candidate{attempt=2}: reused exchange optimization after validating relocated rows phase=8
2026-09-11T17:59:29.108757Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T17:59:29.108790Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:29.114895Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T17:59:29.196444Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=8 transfers=71168 maximum_identical_destinations=1
2026-09-11T17:59:29.196487Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=8 initial_horizon=13126 selected_horizon=13126 endpoint_lower_bound=8704 lower_bound_gap=4422 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:29.232882Z  INFO local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=7
2026-09-11T17:59:29.244272Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=8 tile=78 row_words=256 horizon=13126
2026-09-11T17:59:29.276814Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=7 transfers=66320 maximum_identical_destinations=1
2026-09-11T17:59:29.276848Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=7 initial_horizon=7349 selected_horizon=7349 endpoint_lower_bound=3240 lower_bound_gap=4109 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:29.312535Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=7 tile=966 row_words=285 horizon=7349
2026-09-11T17:59:29.383895Z  INFO local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=8
2026-09-11T17:59:29.432290Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=8 transfers=71168 maximum_identical_destinations=1
2026-09-11T17:59:29.432339Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=8 initial_horizon=13126 selected_horizon=13126 endpoint_lower_bound=8704 lower_bound_gap=4422 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:29.479656Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=8 tile=78 row_words=256 horizon=13126
2026-09-11T17:59:30.655095Z  INFO local_candidate{attempt=2}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T17:59:30.725054Z  INFO local_candidate{attempt=2}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T17:59:30.808773Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T17:59:30.808824Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:30.817729Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=6 transfers=33676 maximum_identical_destinations=1
2026-09-11T17:59:30.817780Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=6 initial_horizon=12637 selected_horizon=12637 endpoint_lower_bound=11940 lower_bound_gap=697 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:30.847474Z  INFO local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T17:59:30.889437Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=6 tile=79 row_words=630 horizon=12637
2026-09-11T17:59:31.000837Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T17:59:31.000898Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:31.012555Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T17:59:31.205259Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T17:59:31.383288Z  INFO local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T17:59:31.487953Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=6 transfers=33676 maximum_identical_destinations=1
2026-09-11T17:59:31.488014Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=6 initial_horizon=12637 selected_horizon=12637 endpoint_lower_bound=11940 lower_bound_gap=697 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:31.491148Z  INFO local_candidate{attempt=2}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T17:59:31.519807Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T17:59:31.519843Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:31.530967Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T17:59:31.565009Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=6 tile=79 row_words=630 horizon=12637
2026-09-11T17:59:32.414077Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=5 transfers=128156 maximum_identical_destinations=1
2026-09-11T17:59:32.414141Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=5 initial_horizon=7378 selected_horizon=7378 endpoint_lower_bound=5184 lower_bound_gap=2194 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:59:32.589250Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=5 tile=154 row_words=1079 horizon=7378
2026-09-11T17:59:32.647141Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="plan_kernels"}: package build phase finished phase="plan_kernels" elapsed_ms=11 success=true
2026-09-11T17:59:32.649728Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="compile_kernels"}: package build phase finished phase="compile_kernels" elapsed_ms=2 success=true
2026-09-11T17:59:32.658922Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="link_runtime"}: package build phase finished phase="link_runtime" elapsed_ms=0 success=true
2026-09-11T17:59:32.691950Z  INFO local_candidate{attempt=2}: exchange table and repeat patch storage exchange_table_bytes=13712 maximum_uncompressed_repeat_patch_bytes=0 maximum_elided_arithmetic_patch_bytes=0
2026-09-11T17:59:32.841727Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="size_tile_code"}: package build phase finished phase="size_tile_code" elapsed_ms=30 success=true
2026-09-11T17:59:32.841774Z  INFO local_candidate{attempt=2}: placing generated tile programs linked_end=319976 host_code_base=376832 host_code_bytes=876 generated_code_bytes=2644 exchange_table_bytes=13712 executable_ranges=[(377776, 524288)]
2026-09-11T17:59:32.841791Z  INFO local_candidate{attempt=2}: allocated package support memory linked_end=319976 profile_bytes=200 exchange_table_bytes=13712 host_code_bytes=876 host_data_bytes=664 generated_code_bytes=2644 code_address=377776 available_ranges=[(327680, 360448), (362872, 376832), (409600, 524288), (524488, 949168)]
2026-09-11T17:59:32.925123Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="place_storage"}: package build phase finished phase="place_storage" elapsed_ms=83 success=true
2026-09-11T17:59:32.941627Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T17:59:32.947704Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=4
2026-09-11T17:59:32.948654Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=4 transfers=2182 maximum_identical_destinations=1
2026-09-11T17:59:32.948673Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=4 initial_horizon=7563 selected_horizon=7563 endpoint_lower_bound=5184 lower_bound_gap=2379 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:32.950814Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=4 tile=134 row_words=39 horizon=7563
2026-09-11T17:59:32.951787Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T17:59:32.953255Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T17:59:32.953275Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:32.955127Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T17:59:33.496975Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=5 transfers=128060 maximum_identical_destinations=1
2026-09-11T17:59:33.497043Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=5 initial_horizon=7428 selected_horizon=7428 endpoint_lower_bound=5184 lower_bound_gap=2244 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:59:33.639712Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T17:59:33.646948Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=5 tile=142 row_words=932 horizon=7428
2026-09-11T17:59:33.671339Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=9 transfers=43760 maximum_identical_destinations=1
2026-09-11T17:59:33.671424Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=9 initial_horizon=2347 selected_horizon=2347 endpoint_lower_bound=1960 lower_bound_gap=387 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:33.708116Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=9 tile=96 row_words=112 horizon=2347
2026-09-11T17:59:34.315138Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=7
2026-09-11T17:59:34.377505Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=7 transfers=66320 maximum_identical_destinations=1
2026-09-11T17:59:34.377562Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=7 initial_horizon=7349 selected_horizon=7349 endpoint_lower_bound=3240 lower_bound_gap=4109 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:34.414237Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=7 tile=966 row_words=285 horizon=7349
2026-09-11T17:59:34.511706Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T17:59:34.520539Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T17:59:34.520575Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:34.528534Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T17:59:36.234683Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T17:59:36.328155Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=6 transfers=33676 maximum_identical_destinations=1
2026-09-11T17:59:36.328238Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=6 initial_horizon=12637 selected_horizon=12637 endpoint_lower_bound=11940 lower_bound_gap=697 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:36.392787Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=6 tile=79 row_words=630 horizon=12637
2026-09-11T17:59:36.833331Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=5
2026-09-11T17:59:36.851671Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T17:59:36.879804Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T17:59:36.879846Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:36.892594Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T17:59:36.942783Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=5 transfers=128156 maximum_identical_destinations=1
2026-09-11T17:59:36.942832Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=5 initial_horizon=7378 selected_horizon=7378 endpoint_lower_bound=5184 lower_bound_gap=2194 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:37.121370Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=5 tile=154 row_words=1079 horizon=7378
2026-09-11T17:59:37.432740Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T17:59:37.522784Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T17:59:37.522834Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:37.753648Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T17:59:37.795582Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="plan_kernels"}: package build phase finished phase="plan_kernels" elapsed_ms=6 success=true
2026-09-11T17:59:37.797510Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="compile_kernels"}: package build phase finished phase="compile_kernels" elapsed_ms=1 success=true
2026-09-11T17:59:37.800192Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="link_runtime"}: package build phase finished phase="link_runtime" elapsed_ms=0 success=true
2026-09-11T17:59:37.830495Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=8
2026-09-11T17:59:37.844074Z  INFO local_candidate{attempt=3}: exchange table and repeat patch storage exchange_table_bytes=13128 maximum_uncompressed_repeat_patch_bytes=0 maximum_elided_arithmetic_patch_bytes=0
2026-09-11T17:59:37.884768Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=8 transfers=71168 maximum_identical_destinations=1
2026-09-11T17:59:37.884809Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=8 initial_horizon=13126 selected_horizon=13126 endpoint_lower_bound=8704 lower_bound_gap=4422 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:37.929654Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=8 tile=78 row_words=256 horizon=13126
2026-09-11T17:59:37.946954Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: package build phase finished phase="lower_exchanges" elapsed_ms=5021 success=true
2026-09-11T17:59:37.998594Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="size_tile_code"}: package build phase finished phase="size_tile_code" elapsed_ms=28 success=true
2026-09-11T17:59:37.998646Z  INFO local_candidate{attempt=3}: placing generated tile programs linked_end=320008 host_code_base=376832 host_code_bytes=876 generated_code_bytes=2692 exchange_table_bytes=13128 executable_ranges=[(377776, 524288)]
2026-09-11T17:59:37.998663Z  INFO local_candidate{attempt=3}: allocated package support memory linked_end=320008 profile_bytes=200 exchange_table_bytes=13128 host_code_bytes=876 host_data_bytes=664 generated_code_bytes=2692 code_address=377776 available_ranges=[(327680, 360448), (362872, 376832), (409600, 524288), (524488, 949168)]
2026-09-11T17:59:38.077193Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="place_storage"}: package build phase finished phase="place_storage" elapsed_ms=78 success=true
2026-09-11T17:59:38.097142Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T17:59:38.097842Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T17:59:38.097864Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:38.100149Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T17:59:38.101373Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=4
2026-09-11T17:59:38.102522Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=4 transfers=2182 maximum_identical_destinations=1
2026-09-11T17:59:38.102544Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=4 initial_horizon=7214 selected_horizon=7214 endpoint_lower_bound=5184 lower_bound_gap=2030 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:38.105395Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=4 tile=165 row_words=39 horizon=7214
2026-09-11T17:59:38.140312Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T17:59:38.200835Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T17:59:38.208494Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T17:59:38.208531Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:38.216138Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T17:59:38.746569Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T17:59:38.781369Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=9 transfers=43760 maximum_identical_destinations=1
2026-09-11T17:59:38.781407Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=9 initial_horizon=2347 selected_horizon=2347 endpoint_lower_bound=1960 lower_bound_gap=387 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:38.808104Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=9 tile=96 row_words=112 horizon=2347
2026-09-11T17:59:39.413832Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=7
2026-09-11T17:59:39.452132Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=7 transfers=66320 maximum_identical_destinations=1
2026-09-11T17:59:39.452172Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=7 initial_horizon=7349 selected_horizon=7349 endpoint_lower_bound=3240 lower_bound_gap=4109 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:39.485591Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=7 tile=966 row_words=285 horizon=7349
2026-09-11T17:59:39.547336Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=8
2026-09-11T17:59:39.610049Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=8 transfers=71168 maximum_identical_destinations=1
2026-09-11T17:59:39.610086Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=8 initial_horizon=13126 selected_horizon=13126 endpoint_lower_bound=8704 lower_bound_gap=4422 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:39.661145Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=8 tile=78 row_words=256 horizon=13126
2026-09-11T17:59:39.945030Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T17:59:39.973649Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T17:59:39.973687Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:39.985009Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T17:59:40.373283Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T17:59:40.374175Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T17:59:40.374196Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:40.376712Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T17:59:40.398159Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=4
2026-09-11T17:59:40.399179Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=4 transfers=2182 maximum_identical_destinations=1
2026-09-11T17:59:40.399221Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=4 initial_horizon=7563 selected_horizon=7563 endpoint_lower_bound=5184 lower_bound_gap=2379 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:40.401577Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=4 tile=134 row_words=39 horizon=7563
2026-09-11T17:59:40.475665Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T17:59:40.481542Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T17:59:40.481578Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:40.488135Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T17:59:40.506514Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T17:59:40.973508Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T17:59:40.995617Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=9 transfers=43760 maximum_identical_destinations=1
2026-09-11T17:59:40.995659Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=9 initial_horizon=2347 selected_horizon=2347 endpoint_lower_bound=1960 lower_bound_gap=387 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:41.028008Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=9 tile=96 row_words=112 horizon=2347
2026-09-11T17:59:41.194047Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T17:59:41.323088Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T17:59:41.323136Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:41.509920Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T17:59:41.525932Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T17:59:41.631602Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=6 transfers=33676 maximum_identical_destinations=1
2026-09-11T17:59:41.631647Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=6 initial_horizon=12637 selected_horizon=12637 endpoint_lower_bound=11940 lower_bound_gap=697 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:41.708668Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=6 tile=79 row_words=630 horizon=12637
2026-09-11T17:59:42.009535Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=8
2026-09-11T17:59:42.061411Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=8 transfers=71168 maximum_identical_destinations=1
2026-09-11T17:59:42.061454Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=8 initial_horizon=13126 selected_horizon=13126 endpoint_lower_bound=8704 lower_bound_gap=4422 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:42.107815Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=8 tile=78 row_words=256 horizon=13126
2026-09-11T17:59:42.355405Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=5
2026-09-11T17:59:42.470368Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=5 transfers=128060 maximum_identical_destinations=1
2026-09-11T17:59:42.470421Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=5 initial_horizon=7428 selected_horizon=7428 endpoint_lower_bound=5184 lower_bound_gap=2244 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:42.613704Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=5 tile=142 row_words=932 horizon=7428
2026-09-11T17:59:42.641067Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: package build phase finished phase="lower_exchanges" elapsed_ms=4563 success=true
2026-09-11T17:59:43.289226Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=7 transfers=66320 maximum_identical_destinations=1
2026-09-11T17:59:43.289297Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=7 initial_horizon=5587 selected_horizon=5587 endpoint_lower_bound=3240 lower_bound_gap=2347 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:59:43.337002Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=7 tile=322 row_words=275 horizon=5587
2026-09-11T17:59:43.640636Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T17:59:43.764002Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T17:59:43.764072Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:43.819912Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T17:59:43.848744Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T17:59:43.848787Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:43.859090Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T17:59:43.892281Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T17:59:44.003072Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=6 transfers=33676 maximum_identical_destinations=1
2026-09-11T17:59:44.003122Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=6 initial_horizon=12637 selected_horizon=12637 endpoint_lower_bound=11940 lower_bound_gap=697 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:44.015882Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T17:59:44.075961Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=6 tile=79 row_words=630 horizon=12637
2026-09-11T17:59:45.323606Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T17:59:45.382089Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=4
2026-09-11T17:59:45.383531Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=4 transfers=2182 maximum_identical_destinations=1
2026-09-11T17:59:45.383558Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=4 initial_horizon=7214 selected_horizon=7214 endpoint_lower_bound=5184 lower_bound_gap=2030 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:45.387272Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=4 tile=165 row_words=39 horizon=7214
2026-09-11T17:59:45.454480Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T17:59:45.461888Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T17:59:45.461923Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:45.468970Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T17:59:45.491470Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T17:59:45.492421Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T17:59:45.492444Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:45.494942Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T17:59:47.756897Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=7 transfers=66320 maximum_identical_destinations=1
2026-09-11T17:59:47.756966Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=7 initial_horizon=5587 selected_horizon=5587 endpoint_lower_bound=3240 lower_bound_gap=2347 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:59:47.796680Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=7 tile=322 row_words=275 horizon=5587
2026-09-11T17:59:47.996685Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=5
2026-09-11T17:59:48.091653Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=5 transfers=128156 maximum_identical_destinations=1
2026-09-11T17:59:48.091703Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=5 initial_horizon=7378 selected_horizon=7378 endpoint_lower_bound=5184 lower_bound_gap=2194 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:48.262365Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=5 tile=154 row_words=1079 horizon=7378
2026-09-11T17:59:48.465809Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T17:59:48.496855Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=9 transfers=43760 maximum_identical_destinations=1
2026-09-11T17:59:48.496891Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=9 initial_horizon=2347 selected_horizon=2347 endpoint_lower_bound=1960 lower_bound_gap=387 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:48.523454Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=9 tile=96 row_words=112 horizon=2347
2026-09-11T17:59:48.702528Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T17:59:48.793046Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=6 transfers=33676 maximum_identical_destinations=1
2026-09-11T17:59:48.793088Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=6 initial_horizon=12637 selected_horizon=12637 endpoint_lower_bound=11940 lower_bound_gap=697 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:48.863911Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=6 tile=79 row_words=630 horizon=12637
2026-09-11T17:59:49.326940Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T17:59:49.355192Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T17:59:49.355260Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:49.367740Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T17:59:49.500855Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=5
2026-09-11T17:59:49.600771Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=5 transfers=128060 maximum_identical_destinations=1
2026-09-11T17:59:49.600823Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=5 initial_horizon=7428 selected_horizon=7428 endpoint_lower_bound=5184 lower_bound_gap=2244 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:49.736400Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=5 tile=142 row_words=932 horizon=7428
2026-09-11T17:59:50.371988Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=8
2026-09-11T17:59:50.431248Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=8 transfers=71168 maximum_identical_destinations=1
2026-09-11T17:59:50.431289Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=8 initial_horizon=13126 selected_horizon=13126 endpoint_lower_bound=8704 lower_bound_gap=4422 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:50.477411Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=8 tile=78 row_words=256 horizon=13126
2026-09-11T17:59:50.533687Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: evaluated exchange placement candidate offset=20480 baseline_score=244276588544 score=125442387968 baseline_cycles=85255 candidate_cycles=83493 row_bytes=13680 row_capacity=16320 accepted=true
2026-09-11T17:59:50.668281Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: package build phase finished phase="optimize_exchange_placement" elapsed_ms=12721 success=true
2026-09-11T17:59:50.679337Z  INFO local_candidate{attempt=2}: costed final placed program final_cycles=241829 final_exchange=90093
2026-09-11T17:59:50.819656Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="prepare_tile_code"}: package build phase finished phase="prepare_tile_code" elapsed_ms=61 success=true
2026-09-11T17:59:50.854277Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="emit_tile_code"}: package build phase finished phase="emit_tile_code" elapsed_ms=34 success=true
2026-09-11T17:59:50.919262Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T17:59:51.022630Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T17:59:51.022675Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:51.078662Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="build_tile_images"}: package build phase finished phase="build_tile_images" elapsed_ms=198 success=true
2026-09-11T17:59:51.228910Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T17:59:51.300576Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: evaluated exchange placement candidate offset=20480 baseline_score=244705469952 score=125871269376 baseline_cycles=84956 candidate_cycles=83194 row_bytes=13096 row_capacity=16320 accepted=true
2026-09-11T17:59:51.448790Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: package build phase finished phase="optimize_exchange_placement" elapsed_ms=8807 success=true
2026-09-11T17:59:51.461337Z  INFO local_candidate{attempt=3}: costed final placed program final_cycles=242278 final_exchange=89794
2026-09-11T17:59:51.609652Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="prepare_tile_code"}: package build phase finished phase="prepare_tile_code" elapsed_ms=61 success=true
2026-09-11T17:59:51.643459Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="emit_tile_code"}: package build phase finished phase="emit_tile_code" elapsed_ms=33 success=true
2026-09-11T17:59:51.831047Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="build_tile_images"}: package build phase finished phase="build_tile_images" elapsed_ms=168 success=true
2026-09-11T17:59:52.262963Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: accepted local layout improvement attempt=2 before=245567 after=241829 changed_operations=[4] opened_boundaries=[3]
2026-09-11T17:59:52.875636Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: evaluating ordered local candidates concurrently candidates=1 threads=16
2026-09-11T17:59:54.354547Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: screened exchange table geometry expansion_ms=1153 expansion_and_footprint_ms=1478 estimated_row_bytes=19448 heuristic_row_bytes=36620 geometry_fragments_per_tile=2137 fragment_limit=16384
2026-09-11T17:59:54.377564Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: eliminated unread FP8 cast input padding clears removed=0
2026-09-11T17:59:54.507355Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T17:59:54.509496Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T17:59:54.509522Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:54.511492Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T17:59:54.515714Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: prepared large physical exchange phase phase=4 transfers=1607 maximum_identical_destinations=1
2026-09-11T17:59:54.515767Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: optimized physical exchange schedule phase=4 initial_horizon=5319 selected_horizon=5319 endpoint_lower_bound=3456 lower_bound_gap=1863 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:59:54.518265Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: finished large physical exchange phase phase=4 tile=56 row_words=35 horizon=5319
2026-09-11T17:59:54.596756Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T17:59:54.604882Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T17:59:54.604916Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:54.612343Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T17:59:55.108927Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T17:59:55.137884Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: prepared large physical exchange phase phase=9 transfers=43760 maximum_identical_destinations=1
2026-09-11T17:59:55.137929Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: optimized physical exchange schedule phase=9 initial_horizon=2347 selected_horizon=2347 endpoint_lower_bound=1960 lower_bound_gap=387 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:55.162662Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: finished large physical exchange phase phase=9 tile=96 row_words=112 horizon=2347
2026-09-11T17:59:55.194634Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T17:59:55.227460Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T17:59:55.227498Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:55.241864Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T17:59:55.937965Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=8
2026-09-11T17:59:55.956895Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=7
2026-09-11T17:59:55.980005Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: prepared large physical exchange phase phase=8 transfers=71168 maximum_identical_destinations=1
2026-09-11T17:59:55.980070Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: optimized physical exchange schedule phase=8 initial_horizon=13126 selected_horizon=13126 endpoint_lower_bound=8704 lower_bound_gap=4422 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:56.001272Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: prepared large physical exchange phase phase=7 transfers=66320 maximum_identical_destinations=1
2026-09-11T17:59:56.001310Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: optimized physical exchange schedule phase=7 initial_horizon=7349 selected_horizon=7349 endpoint_lower_bound=3240 lower_bound_gap=4109 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:56.026945Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: finished large physical exchange phase phase=8 tile=78 row_words=256 horizon=13126
2026-09-11T17:59:56.038571Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: finished large physical exchange phase phase=7 tile=966 row_words=285 horizon=7349
2026-09-11T17:59:57.476910Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T17:59:57.578162Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T17:59:57.578231Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:57.777487Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T17:59:57.833390Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T17:59:57.936011Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: prepared large physical exchange phase phase=6 transfers=33676 maximum_identical_destinations=1
2026-09-11T17:59:57.936061Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: optimized physical exchange schedule phase=6 initial_horizon=12637 selected_horizon=12637 endpoint_lower_bound=11940 lower_bound_gap=697 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:58.007876Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: finished large physical exchange phase phase=6 tile=79 row_words=630 horizon=12637
2026-09-11T17:59:58.045609Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T18:00:00.241129Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: prepared large physical exchange phase phase=5 transfers=128060 maximum_identical_destinations=1
2026-09-11T18:00:00.241239Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: optimized physical exchange schedule phase=5 initial_horizon=5761 selected_horizon=5761 endpoint_lower_bound=3456 lower_bound_gap=2305 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T18:00:00.372794Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: finished large physical exchange phase phase=5 tile=79 row_words=879 horizon=5761
2026-09-11T18:00:00.440443Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="plan_kernels"}: package build phase finished phase="plan_kernels" elapsed_ms=11 success=true
2026-09-11T18:00:00.442337Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="compile_kernels"}: package build phase finished phase="compile_kernels" elapsed_ms=1 success=true
2026-09-11T18:00:00.444622Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="link_runtime"}: package build phase finished phase="link_runtime" elapsed_ms=0 success=true
2026-09-11T18:00:00.479648Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: exchange table and repeat patch storage exchange_table_bytes=13000 maximum_uncompressed_repeat_patch_bytes=0 maximum_elided_arithmetic_patch_bytes=0
2026-09-11T18:00:00.638659Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="size_tile_code"}: package build phase finished phase="size_tile_code" elapsed_ms=34 success=true
2026-09-11T18:00:00.638761Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: placing generated tile programs linked_end=320008 host_code_base=376832 host_code_bytes=876 generated_code_bytes=2612 exchange_table_bytes=13000 executable_ranges=[(377776, 524288)]
2026-09-11T18:00:00.638793Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: allocated package support memory linked_end=320008 profile_bytes=200 exchange_table_bytes=13000 host_code_bytes=876 host_data_bytes=664 generated_code_bytes=2612 code_address=377776 available_ranges=[(327680, 360448), (362872, 376832), (409600, 524288), (524488, 949168)]
2026-09-11T18:00:00.726189Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="place_storage"}: package build phase finished phase="place_storage" elapsed_ms=87 success=true
2026-09-11T18:00:00.763978Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=4
2026-09-11T18:00:00.767637Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=4 transfers=1607 maximum_identical_destinations=1
2026-09-11T18:00:00.767676Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=4 initial_horizon=5319 selected_horizon=5319 endpoint_lower_bound=3456 lower_bound_gap=1863 selected_kind="reused" neighborhood_improvements=0
2026-09-11T18:00:00.771232Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=4 tile=56 row_words=35 horizon=5319
2026-09-11T18:00:00.824054Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T18:00:00.825987Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T18:00:00.826015Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="reused" neighborhood_improvements=0
2026-09-11T18:00:00.828675Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T18:00:00.834798Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T18:00:00.843496Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T18:00:00.843552Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="reused" neighborhood_improvements=0
2026-09-11T18:00:00.852196Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T18:00:00.873462Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T18:00:01.393149Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T18:00:01.394705Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T18:00:01.421663Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=9 transfers=43760 maximum_identical_destinations=1
2026-09-11T18:00:01.421709Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=9 initial_horizon=2347 selected_horizon=2347 endpoint_lower_bound=1960 lower_bound_gap=387 selected_kind="reused" neighborhood_improvements=0
2026-09-11T18:00:01.426978Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T18:00:01.427014Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="reused" neighborhood_improvements=0
2026-09-11T18:00:01.441470Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T18:00:01.451624Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=9 tile=96 row_words=112 horizon=2347
2026-09-11T18:00:02.070119Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=7
2026-09-11T18:00:02.110008Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=7 transfers=66320 maximum_identical_destinations=1
2026-09-11T18:00:02.110053Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=7 initial_horizon=7349 selected_horizon=7349 endpoint_lower_bound=3240 lower_bound_gap=4109 selected_kind="reused" neighborhood_improvements=0
2026-09-11T18:00:02.145296Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=7 tile=966 row_words=285 horizon=7349
2026-09-11T18:00:02.263979Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=8
2026-09-11T18:00:02.309651Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=8 transfers=71168 maximum_identical_destinations=1
2026-09-11T18:00:02.309694Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=8 initial_horizon=13126 selected_horizon=13126 endpoint_lower_bound=8704 lower_bound_gap=4422 selected_kind="reused" neighborhood_improvements=0
2026-09-11T18:00:02.354945Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=8 tile=78 row_words=256 horizon=13126
2026-09-11T18:00:03.821343Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T18:00:03.966704Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T18:00:03.966753Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="reused" neighborhood_improvements=0
2026-09-11T18:00:04.070767Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T18:00:04.163508Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=6 transfers=33676 maximum_identical_destinations=1
2026-09-11T18:00:04.163557Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=6 initial_horizon=12637 selected_horizon=12637 endpoint_lower_bound=11940 lower_bound_gap=697 selected_kind="reused" neighborhood_improvements=0
2026-09-11T18:00:04.166602Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T18:00:04.232331Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=6 tile=79 row_words=630 horizon=12637
2026-09-11T18:00:04.911144Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=5
2026-09-11T18:00:04.994544Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=5 transfers=128060 maximum_identical_destinations=1
2026-09-11T18:00:04.994593Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=5 initial_horizon=5761 selected_horizon=5761 endpoint_lower_bound=3456 lower_bound_gap=2305 selected_kind="reused" neighborhood_improvements=0
2026-09-11T18:00:05.129967Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=5 tile=79 row_words=879 horizon=5761
2026-09-11T18:00:05.155804Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: package build phase finished phase="lower_exchanges" elapsed_ms=4429 success=true
2026-09-11T18:00:07.594178Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T18:00:07.595196Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T18:00:07.595242Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="reused" neighborhood_improvements=0
2026-09-11T18:00:07.598185Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T18:00:07.659724Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T18:00:07.666501Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T18:00:07.673235Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T18:00:07.673270Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="reused" neighborhood_improvements=0
2026-09-11T18:00:07.680335Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T18:00:07.701371Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=4
2026-09-11T18:00:07.702494Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=4 transfers=1607 maximum_identical_destinations=1
2026-09-11T18:00:07.702528Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=4 initial_horizon=5319 selected_horizon=5319 endpoint_lower_bound=3456 lower_bound_gap=1863 selected_kind="reused" neighborhood_improvements=0
2026-09-11T18:00:07.705105Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=4 tile=56 row_words=35 horizon=5319
2026-09-11T18:00:08.251959Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T18:00:08.284470Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T18:00:08.292646Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T18:00:08.292716Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="reused" neighborhood_improvements=0
2026-09-11T18:00:08.309059Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T18:00:08.320604Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=9 transfers=43760 maximum_identical_destinations=1
2026-09-11T18:00:08.320647Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=9 initial_horizon=2347 selected_horizon=2347 endpoint_lower_bound=1960 lower_bound_gap=387 selected_kind="reused" neighborhood_improvements=0
2026-09-11T18:00:08.349707Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=9 tile=96 row_words=112 horizon=2347
2026-09-11T18:00:09.141952Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=8
2026-09-11T18:00:09.187119Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=8 transfers=71168 maximum_identical_destinations=1
2026-09-11T18:00:09.187166Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=8 initial_horizon=13126 selected_horizon=13126 endpoint_lower_bound=8704 lower_bound_gap=4422 selected_kind="reused" neighborhood_improvements=0
2026-09-11T18:00:09.234899Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=8 tile=78 row_words=256 horizon=13126
2026-09-11T18:00:09.969496Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=7 transfers=66320 maximum_identical_destinations=1
2026-09-11T18:00:09.969568Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=7 initial_horizon=5587 selected_horizon=5587 endpoint_lower_bound=3240 lower_bound_gap=2347 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T18:00:10.007890Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=7 tile=322 row_words=275 horizon=5587
2026-09-11T18:00:10.798248Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T18:00:10.896560Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T18:00:10.923979Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T18:00:10.924059Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="reused" neighborhood_improvements=0
2026-09-11T18:00:10.989485Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=6 transfers=33676 maximum_identical_destinations=1
2026-09-11T18:00:10.989525Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=6 initial_horizon=12637 selected_horizon=12637 endpoint_lower_bound=11940 lower_bound_gap=697 selected_kind="reused" neighborhood_improvements=0
2026-09-11T18:00:11.054133Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=6 tile=79 row_words=630 horizon=12637
2026-09-11T18:00:11.118361Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T18:00:11.731541Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=5
2026-09-11T18:00:11.824074Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=5 transfers=128060 maximum_identical_destinations=1
2026-09-11T18:00:11.824136Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=5 initial_horizon=5761 selected_horizon=5761 endpoint_lower_bound=3456 lower_bound_gap=2305 selected_kind="reused" neighborhood_improvements=0
2026-09-11T18:00:11.958088Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=5 tile=79 row_words=879 horizon=5761
2026-09-11T18:00:12.026337Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: evaluated exchange placement candidate offset=20480 baseline_score=249985970432 score=131151769856 baseline_cycles=81394 candidate_cycles=79632 row_bytes=12968 row_capacity=16320 accepted=true
2026-09-11T18:00:12.170647Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: package build phase finished phase="optimize_exchange_placement" elapsed_ms=7014 success=true
2026-09-11T18:00:12.197315Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: costed final placed program final_cycles=237222 final_exchange=86232
2026-09-11T18:00:12.318055Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="prepare_tile_code"}: package build phase finished phase="prepare_tile_code" elapsed_ms=47 success=true
2026-09-11T18:00:12.352142Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="emit_tile_code"}: package build phase finished phase="emit_tile_code" elapsed_ms=33 success=true
2026-09-11T18:00:12.541932Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="build_tile_images"}: package build phase finished phase="build_tile_images" elapsed_ms=170 success=true
2026-09-11T18:00:12.643821Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: accepted local layout improvement attempt=3 before=241829 after=237222 changed_operations=[5] opened_boundaries=[4]
2026-09-11T18:00:13.243249Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: package build phase finished phase="plan_package" elapsed_ms=135607 success=true
2026-09-11T18:00:13.354080Z  INFO writing application package tiles=1472
2026-09-11T18:00:13.475002Z  INFO application package written
2026-09-11T18:00:13.475246Z  INFO reading application package
2026-09-11T18:00:13.717527Z  INFO application package read tiles=1472 compiler=0.1.0
2026-09-11T18:00:13.717949Z  INFO waiting for hardware ownership path=artifacts/layout-sweep/device.lock
2026-09-11T18:00:14.524358Z  INFO acquired hardware ownership path=artifacts/layout-sweep/device.lock
2026-09-11T18:00:14.524451Z  INFO opening IPU device path="/dev/ipu0"
2026-09-11T18:00:14.524555Z  INFO IPU device attached path=/dev/ipu0
2026-09-11T18:00:14.524568Z  INFO initializing IPU device
2026-09-11T18:00:14.532566Z  INFO IPU device initialized
2026-09-11T18:00:14.532626Z  INFO replaying device configuration register_writes=2003
2026-09-11T18:00:14.541072Z  INFO loading application tile_count=1472 final_mark=23
2026-09-11T18:00:14.751037Z  INFO application loaded and initial synchronization completed tile_count=1472
2026-09-11T18:00:15.410282Z  INFO prepared reference inputs elapsed_ms=657
2026-09-11T18:00:15.717767Z  INFO configured host reference BLAS threads=4
referencePrecision=device
2026-09-11T18:00:16.021537Z  INFO evaluated host reference elapsed_ms=611
2026-09-11T18:00:16.024057Z  INFO starting host exchange session startup_mark=23
2026-09-11T18:00:16.024112Z  INFO attaching host exchange pages pages=2
2026-09-11T18:00:16.024871Z  INFO host exchange session started
2026-09-11T18:00:16.024918Z  INFO invoking streaming host exchange call call="initialize" command=0 phases=2
2026-09-11T18:00:16.027029Z  INFO invoking streaming host exchange call call="run" command=0 phases=17
profile=artifacts/attention-grids-20260911/dense/model.ipuprof tiles=1472 samples=55009
referenceInference=1 numericalTest=PASS
referenceMaximumAbsoluteError=0.000061 numericalTest=PASS
package=artifacts/attention-grids-20260911/dense/model.ipuexe tiles=1472 hardwareTest=PASS