2026-09-11T17:57:56.464092Z  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=1 success=true
2026-09-11T17:57:57.646924Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: screened exchange table geometry expansion_ms=593 expansion_and_footprint_ms=758 estimated_row_bytes=29928 heuristic_row_bytes=39892 geometry_fragments_per_tile=3110 fragment_limit=16384
2026-09-11T17:57:57.661031Z  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
2026-09-11T17:57:57.770556Z  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
2026-09-11T17:57:57.770622Z  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
2026-09-11T17:57:57.774866Z  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
2026-09-11T17:57:57.833603Z  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
2026-09-11T17:57:57.833663Z  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
2026-09-11T17:57:57.835781Z  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
2026-09-11T17:57:57.850630Z  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
2026-09-11T17:57:57.850687Z  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
2026-09-11T17:57:57.856974Z  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
2026-09-11T17:57:58.756809Z  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
2026-09-11T17:57:58.793421Z  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
2026-09-11T17:57:58.793462Z  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
2026-09-11T17:57:58.796715Z  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=61520 maximum_identical_destinations=1
2026-09-11T17:57:58.796788Z  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=4507 selected_horizon=4507 endpoint_lower_bound=3640 lower_bound_gap=867 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:57:58.803439Z  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
2026-09-11T17:57:58.830607Z  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=734 row_words=175 horizon=4507
2026-09-11T17:57:59.226335Z  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=66880 maximum_identical_destinations=1
2026-09-11T17:57:59.226399Z  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=8430 selected_horizon=8430 endpoint_lower_bound=3640 lower_bound_gap=4790 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:57:59.234106Z  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=75104 maximum_identical_destinations=1
2026-09-11T17:57:59.234163Z  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=13470 selected_horizon=13470 endpoint_lower_bound=8832 lower_bound_gap=4638 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:57:59.259494Z  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=363 row_words=286 horizon=8430
2026-09-11T17:57:59.281669Z  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=315 horizon=13470
2026-09-11T17:58:00.995026Z  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
2026-09-11T17:58:00.995103Z  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
2026-09-11T17:58:01.083910Z  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=32656 maximum_identical_destinations=1
2026-09-11T17:58:01.083979Z  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=7035 selected_horizon=7035 endpoint_lower_bound=6192 lower_bound_gap=843 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:01.148408Z  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=385 row_words=620 horizon=7035
2026-09-11T17:58:01.186503Z  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
2026-09-11T17:58:02.120693Z  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
2026-09-11T17:58:02.120757Z  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
2026-09-11T17:58:02.352681Z  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
2026-09-11T17:58:02.399668Z  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=14 success=true
2026-09-11T17:58:02.400489Z  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_f8_interleaved_k384_c64_r80_r82" target=ipu21
2026-09-11T17:58:02.458342Z  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/69b977c9931ba5e5fbd5fe0b5a76f681ad82c4fbc080763550488f161c9b2b7c/kernel.o metadata=/srv/home/.cache/ipu-stack/kernels/69b977c9931ba5e5fbd5fe0b5a76f681ad82c4fbc080763550488f161c9b2b7c/kernel.json
2026-09-11T17:58:02.462047Z  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=62 success=true
2026-09-11T17:58:02.463695Z  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
2026-09-11T17:58:02.487510Z  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=20616 maximum_uncompressed_repeat_patch_bytes=0 maximum_elided_arithmetic_patch_bytes=0
2026-09-11T17:58:02.612467Z  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
2026-09-11T17:58:02.612560Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: placing generated tile programs linked_end=319576 host_code_base=376832 host_code_bytes=860 generated_code_bytes=2688 exchange_table_bytes=20616 executable_ranges=[(377760, 524288)]
2026-09-11T17:58:02.612593Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: allocated package support memory linked_end=319576 profile_bytes=192 exchange_table_bytes=20616 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)]
2026-09-11T17:58:02.693067Z  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=80 success=true
2026-09-11T17:58:02.713384Z  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
2026-09-11T17:58:02.713925Z  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
2026-09-11T17:58:02.713941Z  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
2026-09-11T17:58:02.715745Z  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
2026-09-11T17:58:02.766753Z  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
2026-09-11T17:58:02.766810Z  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
2026-09-11T17:58:02.768695Z  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
2026-09-11T17:58:02.803049Z  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
2026-09-11T17:58:02.807688Z  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
2026-09-11T17:58:02.807718Z  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
2026-09-11T17:58:02.813093Z  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
2026-09-11T17:58:02.833648Z  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
2026-09-11T17:58:03.170568Z  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
2026-09-11T17:58:03.198257Z  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
2026-09-11T17:58:03.198294Z  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
2026-09-11T17:58:03.208374Z  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
2026-09-11T17:58:03.609541Z  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
2026-09-11T17:58:03.645583Z  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=61520 maximum_identical_destinations=1
2026-09-11T17:58:03.645630Z  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=4507 selected_horizon=4507 endpoint_lower_bound=3640 lower_bound_gap=867 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:03.686953Z  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=734 row_words=175 horizon=4507
2026-09-11T17:58:05.664089Z  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=66880 maximum_identical_destinations=1
2026-09-11T17:58:05.664173Z  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=8403 selected_horizon=8403 endpoint_lower_bound=3640 lower_bound_gap=4763 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:05.690818Z  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=75104 maximum_identical_destinations=1
2026-09-11T17:58:05.690887Z  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=13470 selected_horizon=13470 endpoint_lower_bound=8832 lower_bound_gap=4638 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:05.698930Z  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=363 row_words=286 horizon=8403
2026-09-11T17:58:05.725047Z  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
2026-09-11T17:58:05.737102Z  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=318 horizon=13470
2026-09-11T17:58:05.831695Z  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
2026-09-11T17:58:05.831750Z  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
2026-09-11T17:58:06.035942Z  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
2026-09-11T17:58:06.817952Z  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
2026-09-11T17:58:06.902985Z  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=32656 maximum_identical_destinations=1
2026-09-11T17:58:06.903034Z  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=7035 selected_horizon=7035 endpoint_lower_bound=6192 lower_bound_gap=843 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:06.972945Z  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=385 row_words=620 horizon=7035
2026-09-11T17:58:11.892512Z  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
2026-09-11T17:58:11.892586Z  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
2026-09-11T17:58:12.122100Z  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
2026-09-11T17:58:12.152167Z  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=9459 success=true
2026-09-11T17:58:14.289362Z  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
2026-09-11T17:58:14.290238Z  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
2026-09-11T17:58:14.290259Z  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
2026-09-11T17:58:14.291734Z  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
2026-09-11T17:58:14.297476Z  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
2026-09-11T17:58:14.327863Z  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
2026-09-11T17:58:14.328973Z  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
2026-09-11T17:58:14.328996Z  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
2026-09-11T17:58:14.330989Z  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
2026-09-11T17:58:14.400107Z  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
2026-09-11T17:58:14.407107Z  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
2026-09-11T17:58:14.407140Z  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
2026-09-11T17:58:14.413198Z  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
2026-09-11T17:58:15.204122Z  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
2026-09-11T17:58:15.234662Z  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=61520 maximum_identical_destinations=1
2026-09-11T17:58:15.234702Z  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=4507 selected_horizon=4507 endpoint_lower_bound=3640 lower_bound_gap=867 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:15.269663Z  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=734 row_words=175 horizon=4507
2026-09-11T17:58:15.659290Z  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
2026-09-11T17:58:15.705346Z  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=75104 maximum_identical_destinations=1
2026-09-11T17:58:15.705391Z  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=13470 selected_horizon=13470 endpoint_lower_bound=8832 lower_bound_gap=4638 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:15.750451Z  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=318 horizon=13470
2026-09-11T17:58:16.201990Z  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
2026-09-11T17:58:16.227939Z  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
2026-09-11T17:58:16.227978Z  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
2026-09-11T17:58:16.237551Z  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
2026-09-11T17:58:16.660917Z  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=66880 maximum_identical_destinations=1
2026-09-11T17:58:16.660981Z  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=5840 selected_horizon=5840 endpoint_lower_bound=3640 lower_bound_gap=2200 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:16.699839Z  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=363 row_words=277 horizon=5840
2026-09-11T17:58:17.180915Z  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
2026-09-11T17:58:17.265312Z  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=32656 maximum_identical_destinations=1
2026-09-11T17:58:17.265383Z  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=7035 selected_horizon=7035 endpoint_lower_bound=6192 lower_bound_gap=843 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:17.344125Z  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=385 row_words=620 horizon=7035
2026-09-11T17:58:19.651479Z  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
2026-09-11T17:58:19.730816Z  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
2026-09-11T17:58:19.730858Z  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
2026-09-11T17:58:19.944325Z  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
2026-09-11T17:58:20.284258Z  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
2026-09-11T17:58:20.347280Z  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
2026-09-11T17:58:20.347318Z  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
2026-09-11T17:58:20.567768Z  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
2026-09-11T17:58:20.628423Z  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=12288 baseline_score=229261844480 score=107063418880 baseline_cycles=88216 candidate_cycles=85653 row_bytes=20408 row_capacity=32704 accepted=true
2026-09-11T17:58:20.750040Z  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=8597 success=true
2026-09-11T17:58:20.755030Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: costed final placed program final_cycles=267659 final_exchange=92253
2026-09-11T17:58:20.864907Z  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=37 success=true
2026-09-11T17:58:20.893815Z  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
2026-09-11T17:58:21.086920Z  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=177 success=true
2026-09-11T17:58:21.168274Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: validated canonical baseline cycles=267659
2026-09-11T17:58:22.596698Z  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=122 baseline_cycles=72864 candidate_cycles=70176 baseline_pressure=48045 candidate_pressure=49241
2026-09-11T17:58:23.533559Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: screened exchange table geometry expansion_ms=662 expansion_and_footprint_ms=884 estimated_row_bytes=29928 heuristic_row_bytes=39892 geometry_fragments_per_tile=3110 fragment_limit=16384
2026-09-11T17:58:23.548716Z  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
2026-09-11T17:58:23.648722Z  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
2026-09-11T17:58:23.648776Z  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=8227 selected_horizon=8227 endpoint_lower_bound=6912 lower_bound_gap=1315 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:23.650660Z  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=672 row_words=42 horizon=8227
2026-09-11T17:58:23.655733Z  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
2026-09-11T17:58:23.655797Z  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=7974 selected_horizon=7974 endpoint_lower_bound=7872 lower_bound_gap=102 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:23.659238Z  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=787 row_words=13 horizon=7974
2026-09-11T17:58:23.765744Z  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
2026-09-11T17:58:23.765804Z  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=2461 selected_horizon=2461 endpoint_lower_bound=2304 lower_bound_gap=157 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:23.773277Z  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=664 row_words=110 horizon=2461
2026-09-11T17:58:24.442162Z  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=637 ordinary_horizon=14196 paired_horizon=15338 use_paired=false
2026-09-11T17:58:24.479073Z  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
2026-09-11T17:58:24.479102Z  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=14196 selected_horizon=14196 endpoint_lower_bound=14016 lower_bound_gap=180 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:24.489035Z  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=504 row_words=177 horizon=14196
2026-09-11T17:58:24.605764Z  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=61520 maximum_identical_destinations=1
2026-09-11T17:58:24.605817Z  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=4751 selected_horizon=4751 endpoint_lower_bound=3640 lower_bound_gap=1111 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:24.642542Z  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=765 row_words=179 horizon=4751
2026-09-11T17:58:24.997182Z  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=66880 maximum_identical_destinations=1
2026-09-11T17:58:24.997277Z  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=8223 selected_horizon=8223 endpoint_lower_bound=3640 lower_bound_gap=4583 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:25.034515Z  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=473 row_words=284 horizon=8223
2026-09-11T17:58:26.572063Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: compared ordinary and paired exchange schedules phase=8 candidates=1280 ordinary_horizon=13536 paired_horizon=10779 use_paired=false
2026-09-11T17:58:26.660412Z  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=75104 maximum_identical_destinations=1
2026-09-11T17:58:26.660459Z  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=13536 selected_horizon=13536 endpoint_lower_bound=8832 lower_bound_gap=4704 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:26.726646Z  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=749 row_words=312 horizon=13536
2026-09-11T17:58:26.774372Z  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=32656 maximum_identical_destinations=1
2026-09-11T17:58:26.774445Z  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=7160 selected_horizon=7160 endpoint_lower_bound=6192 lower_bound_gap=968 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:26.851535Z  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=300 row_words=634 horizon=7160
2026-09-11T17:58:26.998574Z  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
2026-09-11T17:58:26.998637Z  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=4038 selected_horizon=4038 endpoint_lower_bound=3456 lower_bound_gap=582 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:27.148791Z  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=832 row_words=1002 horizon=4038
2026-09-11T17:58:28.321654Z  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
2026-09-11T17:58:28.321721Z  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=11094 selected_horizon=11094 endpoint_lower_bound=6912 lower_bound_gap=4182 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:28.566788Z  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=600 row_words=2644 horizon=11094
2026-09-11T17:58:28.605490Z  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
2026-09-11T17:58:28.607955Z  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=2 success=true
2026-09-11T17:58:28.612367Z  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
2026-09-11T17:58:28.659247Z  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=19852 maximum_uncompressed_repeat_patch_bytes=0 maximum_elided_arithmetic_patch_bytes=0
2026-09-11T17:58:28.862169Z  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=23 success=true
2026-09-11T17:58:28.862251Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: placing generated tile programs linked_end=319576 host_code_base=376832 host_code_bytes=876 generated_code_bytes=2688 exchange_table_bytes=19852 executable_ranges=[(377776, 524288)]
2026-09-11T17:58:28.862268Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: allocated package support memory linked_end=319576 profile_bytes=192 exchange_table_bytes=19852 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)]
2026-09-11T17:58:28.935845Z  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=73 success=true
2026-09-11T17:58:28.949094Z  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
2026-09-11T17:58:28.969320Z  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
2026-09-11T17:58:28.970194Z  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
2026-09-11T17:58:28.970250Z  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=7974 selected_horizon=7974 endpoint_lower_bound=7872 lower_bound_gap=102 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:28.973468Z  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=787 row_words=13 horizon=7974
2026-09-11T17:58:29.053133Z  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
2026-09-11T17:58:29.061237Z  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
2026-09-11T17:58:29.061278Z  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=2461 selected_horizon=2461 endpoint_lower_bound=2304 lower_bound_gap=157 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:29.068058Z  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=664 row_words=110 horizon=2461
2026-09-11T17:58:29.892390Z  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
2026-09-11T17:58:29.932600Z  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=61520 maximum_identical_destinations=1
2026-09-11T17:58:29.932646Z  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=4751 selected_horizon=4751 endpoint_lower_bound=3640 lower_bound_gap=1111 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:29.971713Z  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=765 row_words=179 horizon=4751
2026-09-11T17:58:31.662266Z  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=66880 maximum_identical_destinations=1
2026-09-11T17:58:31.662336Z  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=8254 selected_horizon=8254 endpoint_lower_bound=3640 lower_bound_gap=4614 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:31.707151Z  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=380 row_words=283 horizon=8254
2026-09-11T17:58:31.761880Z  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
2026-09-11T17:58:31.761942Z  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=8227 selected_horizon=8227 endpoint_lower_bound=6912 lower_bound_gap=1315 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:31.763814Z  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=672 row_words=42 horizon=8227
2026-09-11T17:58:31.993824Z  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
2026-09-11T17:58:31.995432Z  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
2026-09-11T17:58:32.080969Z  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=32656 maximum_identical_destinations=1
2026-09-11T17:58:32.081034Z  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=7160 selected_horizon=7160 endpoint_lower_bound=6192 lower_bound_gap=968 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:32.084286Z  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
2026-09-11T17:58:32.084333Z  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=4038 selected_horizon=4038 endpoint_lower_bound=3456 lower_bound_gap=582 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:32.150268Z  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=300 row_words=634 horizon=7160
2026-09-11T17:58:32.289551Z  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=832 row_words=1002 horizon=4038
2026-09-11T17:58:32.553181Z  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
2026-09-11T17:58:32.587696Z  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
2026-09-11T17:58:32.587735Z  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=14196 selected_horizon=14196 endpoint_lower_bound=14016 lower_bound_gap=180 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:32.599940Z  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=504 row_words=177 horizon=14196
2026-09-11T17:58:33.179343Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: compared ordinary and paired exchange schedules phase=8 candidates=1280 ordinary_horizon=13528 paired_horizon=10779 use_paired=false
2026-09-11T17:58:33.269618Z  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=75104 maximum_identical_destinations=1
2026-09-11T17:58:33.269662Z  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=13528 selected_horizon=13528 endpoint_lower_bound=8832 lower_bound_gap=4696 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:33.318444Z  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=749 row_words=314 horizon=13528
2026-09-11T17:58:37.269651Z  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
2026-09-11T17:58:37.269721Z  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=11138 selected_horizon=11138 endpoint_lower_bound=6912 lower_bound_gap=4226 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:37.496325Z  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=528 row_words=2653 horizon=11138
2026-09-11T17:58:37.535079Z  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=8599 success=true
2026-09-11T17:58:39.527402Z  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
2026-09-11T17:58:39.564563Z  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
2026-09-11T17:58:39.566056Z  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
2026-09-11T17:58:39.566089Z  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=8227 selected_horizon=8227 endpoint_lower_bound=6912 lower_bound_gap=1315 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:39.569188Z  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=672 row_words=42 horizon=8227
2026-09-11T17:58:39.574635Z  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
2026-09-11T17:58:39.575540Z  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
2026-09-11T17:58:39.575564Z  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=7974 selected_horizon=7974 endpoint_lower_bound=7872 lower_bound_gap=102 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:39.577829Z  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=787 row_words=13 horizon=7974
2026-09-11T17:58:39.587608Z  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
2026-09-11T17:58:39.593425Z  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
2026-09-11T17:58:39.593453Z  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=2461 selected_horizon=2461 endpoint_lower_bound=2304 lower_bound_gap=157 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:39.599241Z  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=664 row_words=110 horizon=2461
2026-09-11T17:58:40.425593Z  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
2026-09-11T17:58:40.471272Z  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=61520 maximum_identical_destinations=1
2026-09-11T17:58:40.471329Z  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=4751 selected_horizon=4751 endpoint_lower_bound=3640 lower_bound_gap=1111 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:40.509241Z  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=765 row_words=179 horizon=4751
2026-09-11T17:58:41.026467Z  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
2026-09-11T17:58:41.098580Z  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=75104 maximum_identical_destinations=1
2026-09-11T17:58:41.098630Z  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=13528 selected_horizon=13528 endpoint_lower_bound=8832 lower_bound_gap=4696 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:41.145178Z  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=749 row_words=314 horizon=13528
2026-09-11T17:58:41.970663Z  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=66880 maximum_identical_destinations=1
2026-09-11T17:58:41.970760Z  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=6188 selected_horizon=6188 endpoint_lower_bound=3640 lower_bound_gap=2548 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:42.014102Z  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=473 row_words=280 horizon=6188
2026-09-11T17:58:42.421808Z  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
2026-09-11T17:58:42.450028Z  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
2026-09-11T17:58:42.450068Z  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=14196 selected_horizon=14196 endpoint_lower_bound=14016 lower_bound_gap=180 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:42.460433Z  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=504 row_words=177 horizon=14196
2026-09-11T17:58:42.512643Z  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
2026-09-11T17:58:42.607272Z  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
2026-09-11T17:58:42.644967Z  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
2026-09-11T17:58:42.645009Z  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=4038 selected_horizon=4038 endpoint_lower_bound=3456 lower_bound_gap=582 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:42.702249Z  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=32656 maximum_identical_destinations=1
2026-09-11T17:58:42.702285Z  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=7160 selected_horizon=7160 endpoint_lower_bound=6192 lower_bound_gap=968 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:42.767173Z  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=300 row_words=634 horizon=7160
2026-09-11T17:58:42.840709Z  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=832 row_words=1002 horizon=4038
2026-09-11T17:58:43.209698Z  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
2026-09-11T17:58:43.295230Z  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
2026-09-11T17:58:43.295282Z  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=11138 selected_horizon=11138 endpoint_lower_bound=6912 lower_bound_gap=4226 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:43.516369Z  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=528 row_words=2653 horizon=11138
2026-09-11T17:58:43.580739Z  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=12288 baseline_score=229261844480 score=107063418880 baseline_cycles=88052 candidate_cycles=85986 row_bytes=19836 row_capacity=32704 accepted=true
2026-09-11T17:58:43.732455Z  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=6197 success=true
2026-09-11T17:58:43.744976Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: costed final placed program final_cycles=267992 final_exchange=92586
2026-09-11T17:58:43.865833Z  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=42 success=true
2026-09-11T17:58:43.902579Z  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=36 success=true
2026-09-11T17:58:44.080978Z  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
2026-09-11T17:58:44.159127Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: retained incumbent tile mapping
2026-09-11T17:58:44.495761Z  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
2026-09-11T17:58:45.483469Z  INFO local_candidate{attempt=1}: screened exchange table geometry expansion_ms=810 expansion_and_footprint_ms=987 estimated_row_bytes=22144 heuristic_row_bytes=41192 geometry_fragments_per_tile=2466 fragment_limit=16384
2026-09-11T17:58:45.495355Z  INFO local_candidate{attempt=1}: eliminated unread FP8 cast input padding clears removed=0
2026-09-11T17:58:45.576639Z  INFO local_candidate{attempt=2}: screened exchange table geometry expansion_ms=833 expansion_and_footprint_ms=1080 estimated_row_bytes=22864 heuristic_row_bytes=41192 geometry_fragments_per_tile=2524 fragment_limit=16384
2026-09-11T17:58:45.586889Z  INFO local_candidate{attempt=3}: screened exchange table geometry expansion_ms=826 expansion_and_footprint_ms=1090 estimated_row_bytes=29520 heuristic_row_bytes=38272 geometry_fragments_per_tile=3059 fragment_limit=16384
2026-09-11T17:58:45.593506Z  INFO local_candidate{attempt=2}: eliminated unread FP8 cast input padding clears removed=0
2026-09-11T17:58:45.595923Z  INFO local_candidate{attempt=1}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T17:58:45.595986Z  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
2026-09-11T17:58:45.599356Z  INFO local_candidate{attempt=1}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T17:58:45.608450Z  INFO local_candidate{attempt=3}: eliminated unread FP8 cast input padding clears removed=0
2026-09-11T17:58:45.628272Z  INFO local_candidate{attempt=1}: prepared large physical exchange phase phase=4 transfers=2181 maximum_identical_destinations=1
2026-09-11T17:58:45.628344Z  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
2026-09-11T17:58:45.631769Z  INFO local_candidate{attempt=1}: finished large physical exchange phase phase=4 tile=55 row_words=43 horizon=8725
2026-09-11T17:58:45.688501Z  INFO local_candidate{attempt=1}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T17:58:45.688565Z  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
2026-09-11T17:58:45.696619Z  INFO local_candidate{attempt=1}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T17:58:45.765426Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T17:58:45.765481Z  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
2026-09-11T17:58:45.767442Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T17:58:45.813604Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T17:58:45.813658Z  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
2026-09-11T17:58:45.819160Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T17:58:46.382385Z  INFO local_candidate{attempt=1}: compared ordinary and paired exchange schedules phase=0 candidates=2105 ordinary_horizon=14130 paired_horizon=18454 use_paired=false
2026-09-11T17:58:46.421990Z  INFO local_candidate{attempt=1}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T17:58:46.422032Z  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
2026-09-11T17:58:46.432731Z  INFO local_candidate{attempt=1}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T17:58:46.611569Z  INFO local_candidate{attempt=1}: prepared large physical exchange phase phase=9 transfers=61520 maximum_identical_destinations=1
2026-09-11T17:58:46.611645Z  INFO local_candidate{attempt=1}: optimized physical exchange schedule phase=9 initial_horizon=4507 selected_horizon=4507 endpoint_lower_bound=3640 lower_bound_gap=867 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:46.650726Z  INFO local_candidate{attempt=1}: finished large physical exchange phase phase=9 tile=734 row_words=175 horizon=4507
2026-09-11T17:58:46.770172Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=9 transfers=61520 maximum_identical_destinations=1
2026-09-11T17:58:46.770255Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=9 initial_horizon=4507 selected_horizon=4507 endpoint_lower_bound=3640 lower_bound_gap=867 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:46.806537Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=9 tile=734 row_words=175 horizon=4507
2026-09-11T17:58:47.030765Z  INFO local_candidate{attempt=1}: prepared large physical exchange phase phase=7 transfers=66880 maximum_identical_destinations=1
2026-09-11T17:58:47.030831Z  INFO local_candidate{attempt=1}: optimized physical exchange schedule phase=7 initial_horizon=8430 selected_horizon=8430 endpoint_lower_bound=3640 lower_bound_gap=4790 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:47.065189Z  INFO local_candidate{attempt=1}: finished large physical exchange phase phase=7 tile=363 row_words=286 horizon=8430
2026-09-11T17:58:47.069970Z  INFO local_candidate{attempt=1}: prepared large physical exchange phase phase=8 transfers=75104 maximum_identical_destinations=1
2026-09-11T17:58:47.070025Z  INFO local_candidate{attempt=1}: optimized physical exchange schedule phase=8 initial_horizon=13470 selected_horizon=13470 endpoint_lower_bound=8832 lower_bound_gap=4638 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:47.117676Z  INFO local_candidate{attempt=1}: finished large physical exchange phase phase=8 tile=78 row_words=318 horizon=13470
2026-09-11T17:58:47.217634Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=8 transfers=75104 maximum_identical_destinations=1
2026-09-11T17:58:47.217691Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=8 initial_horizon=13470 selected_horizon=13470 endpoint_lower_bound=8832 lower_bound_gap=4638 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:47.268967Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=8 tile=78 row_words=318 horizon=13470
2026-09-11T17:58:48.202395Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=7 transfers=66880 maximum_identical_destinations=1
2026-09-11T17:58:48.202460Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=7 initial_horizon=8430 selected_horizon=8430 endpoint_lower_bound=3640 lower_bound_gap=4790 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:48.237348Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=7 tile=363 row_words=286 horizon=8430
2026-09-11T17:58:48.878060Z  INFO local_candidate{attempt=1}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T17:58:48.878120Z  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
2026-09-11T17:58:48.911443Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=6 transfers=33134 maximum_identical_destinations=1
2026-09-11T17:58:48.911499Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=6 initial_horizon=13272 selected_horizon=13272 endpoint_lower_bound=12336 lower_bound_gap=936 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:48.921890Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T17:58:48.921947Z  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
2026-09-11T17:58:48.977922Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=6 tile=715 row_words=629 horizon=13272
2026-09-11T17:58:49.022051Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=4 transfers=2181 maximum_identical_destinations=1
2026-09-11T17:58:49.022103Z  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
2026-09-11T17:58:49.024731Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=4 tile=55 row_words=43 horizon=8725
2026-09-11T17:58:49.079682Z  INFO local_candidate{attempt=1}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T17:58:49.126921Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T17:58:50.012141Z  INFO local_candidate{attempt=2}: compared ordinary and paired exchange schedules phase=0 candidates=2105 ordinary_horizon=14130 paired_horizon=18454 use_paired=false
2026-09-11T17:58:50.050586Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T17:58:50.050621Z  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
2026-09-11T17:58:50.060768Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T17:58:50.327821Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=5 transfers=128104 maximum_identical_destinations=1
2026-09-11T17:58:50.327884Z  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
2026-09-11T17:58:50.551993Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=5 tile=159 row_words=1279 horizon=9031
2026-09-11T17:58:50.642564Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="plan_kernels"}: package build phase finished phase="plan_kernels" elapsed_ms=6 success=true
2026-09-11T17:58:50.645362Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="compile_kernels"}: package build phase finished phase="compile_kernels" elapsed_ms=2 success=true
2026-09-11T17:58:50.647063Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="link_runtime"}: package build phase finished phase="link_runtime" elapsed_ms=0 success=true
2026-09-11T17:58:50.684691Z  INFO local_candidate{attempt=2}: exchange table and repeat patch storage exchange_table_bytes=14712 maximum_uncompressed_repeat_patch_bytes=0 maximum_elided_arithmetic_patch_bytes=0
2026-09-11T17:58:50.739346Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=4 transfers=2182 maximum_identical_destinations=1
2026-09-11T17:58:50.739403Z  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
2026-09-11T17:58:50.741801Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=4 tile=30 row_words=40 horizon=7563
2026-09-11T17:58:50.814447Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T17:58:50.814501Z  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
2026-09-11T17:58:50.820118Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T17:58:50.892245Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="size_tile_code"}: package build phase finished phase="size_tile_code" elapsed_ms=37 success=true
2026-09-11T17:58:50.892303Z  INFO local_candidate{attempt=2}: placing generated tile programs linked_end=320152 host_code_base=376832 host_code_bytes=876 generated_code_bytes=2724 exchange_table_bytes=14712 executable_ranges=[(377776, 524288)]
2026-09-11T17:58:50.892326Z  INFO local_candidate{attempt=2}: allocated package support memory linked_end=320152 profile_bytes=200 exchange_table_bytes=14712 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)]
2026-09-11T17:58:50.959796Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="place_storage"}: package build phase finished phase="place_storage" elapsed_ms=67 success=true
2026-09-11T17:58:50.975138Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T17:58:50.993742Z  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
2026-09-11T17:58:50.993816Z  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
2026-09-11T17:58:50.995077Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T17:58:50.996364Z  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
2026-09-11T17:58:51.000844Z  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
2026-09-11T17:58:51.000928Z  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
2026-09-11T17:58:51.007540Z  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
2026-09-11T17:58:51.078303Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T17:58:51.084593Z  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
2026-09-11T17:58:51.084622Z  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
2026-09-11T17:58:51.090282Z  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
2026-09-11T17:58:51.782879Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=9 transfers=61520 maximum_identical_destinations=1
2026-09-11T17:58:51.782959Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=9 initial_horizon=4507 selected_horizon=4507 endpoint_lower_bound=3640 lower_bound_gap=867 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:51.820986Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=9 tile=734 row_words=175 horizon=4507
2026-09-11T17:58:51.910520Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T17:58:51.940759Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=9 transfers=61520 maximum_identical_destinations=1
2026-09-11T17:58:51.940821Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=9 initial_horizon=4507 selected_horizon=4507 endpoint_lower_bound=3640 lower_bound_gap=867 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:51.978184Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=9 tile=734 row_words=175 horizon=4507
2026-09-11T17:58:52.267969Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=7 transfers=66880 maximum_identical_destinations=1
2026-09-11T17:58:52.268049Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=7 initial_horizon=8430 selected_horizon=8430 endpoint_lower_bound=3640 lower_bound_gap=4790 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:52.281858Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=8 transfers=75104 maximum_identical_destinations=1
2026-09-11T17:58:52.281916Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=8 initial_horizon=13597 selected_horizon=13597 endpoint_lower_bound=8832 lower_bound_gap=4765 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:52.319862Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=7 tile=363 row_words=286 horizon=8430
2026-09-11T17:58:52.331479Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=8 tile=79 row_words=316 horizon=13597
2026-09-11T17:58:52.475264Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=8
2026-09-11T17:58:52.489370Z  INFO local_candidate{attempt=1}: prepared large physical exchange phase phase=6 transfers=33612 maximum_identical_destinations=1
2026-09-11T17:58:52.489429Z  INFO local_candidate{attempt=1}: optimized physical exchange schedule phase=6 initial_horizon=13194 selected_horizon=13194 endpoint_lower_bound=12336 lower_bound_gap=858 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:52.524648Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=8 transfers=75104 maximum_identical_destinations=1
2026-09-11T17:58:52.524706Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=8 initial_horizon=13470 selected_horizon=13470 endpoint_lower_bound=8832 lower_bound_gap=4638 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:52.569122Z  INFO local_candidate{attempt=1}: finished large physical exchange phase phase=6 tile=719 row_words=631 horizon=13194
2026-09-11T17:58:52.595110Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=8 tile=78 row_words=318 horizon=13470
2026-09-11T17:58:52.632488Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T17:58:52.632543Z  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
2026-09-11T17:58:52.634612Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T17:58:53.835714Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=7 transfers=66880 maximum_identical_destinations=1
2026-09-11T17:58:53.835779Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=7 initial_horizon=8403 selected_horizon=8403 endpoint_lower_bound=3640 lower_bound_gap=4763 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:53.872997Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=7 tile=363 row_words=286 horizon=8403
2026-09-11T17:58:53.923224Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=6 transfers=32656 maximum_identical_destinations=1
2026-09-11T17:58:53.923309Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=6 initial_horizon=7035 selected_horizon=7035 endpoint_lower_bound=6192 lower_bound_gap=843 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:53.991536Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=6 tile=385 row_words=620 horizon=7035
2026-09-11T17:58:54.098780Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T17:58:54.182448Z  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
2026-09-11T17:58:54.182490Z  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
2026-09-11T17:58:54.199794Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T17:58:54.280591Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=6 transfers=33134 maximum_identical_destinations=1
2026-09-11T17:58:54.280627Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=6 initial_horizon=13272 selected_horizon=13272 endpoint_lower_bound=12336 lower_bound_gap=936 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:54.354966Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=6 tile=715 row_words=629 horizon=13272
2026-09-11T17:58:54.374022Z  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
2026-09-11T17:58:54.827424Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T17:58:54.853598Z  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
2026-09-11T17:58:54.853633Z  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
2026-09-11T17:58:54.863538Z  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
2026-09-11T17:58:54.998955Z  INFO local_candidate{attempt=1}: prepared large physical exchange phase phase=5 transfers=128156 maximum_identical_destinations=1
2026-09-11T17:58:54.999015Z  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
2026-09-11T17:58:55.007517Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=5
2026-09-11T17:58:55.060712Z  INFO local_candidate{attempt=3}: compared ordinary and paired exchange schedules phase=0 candidates=2105 ordinary_horizon=14130 paired_horizon=18454 use_paired=false
2026-09-11T17:58:55.077973Z  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
2026-09-11T17:58:55.078042Z  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
2026-09-11T17:58:55.111409Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T17:58:55.111452Z  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
2026-09-11T17:58:55.123862Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T17:58:55.203585Z  INFO local_candidate{attempt=1}: finished large physical exchange phase phase=5 tile=154 row_words=1096 horizon=8460
2026-09-11T17:58:55.255606Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="plan_kernels"}: package build phase finished phase="plan_kernels" elapsed_ms=10 success=true
2026-09-11T17:58:55.257641Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="compile_kernels"}: package build phase finished phase="compile_kernels" elapsed_ms=1 success=true
2026-09-11T17:58:55.259785Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="link_runtime"}: package build phase finished phase="link_runtime" elapsed_ms=0 success=true
2026-09-11T17:58:55.287846Z  INFO local_candidate{attempt=1}: exchange table and repeat patch storage exchange_table_bytes=14104 maximum_uncompressed_repeat_patch_bytes=0 maximum_elided_arithmetic_patch_bytes=0
2026-09-11T17:58:55.298136Z  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
2026-09-11T17:58:55.324993Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: package build phase finished phase="lower_exchanges" elapsed_ms=4365 success=true
2026-09-11T17:58:55.445788Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="size_tile_code"}: package build phase finished phase="size_tile_code" elapsed_ms=39 success=true
2026-09-11T17:58:55.445861Z  INFO local_candidate{attempt=1}: placing generated tile programs linked_end=320152 host_code_base=376832 host_code_bytes=876 generated_code_bytes=2724 exchange_table_bytes=14104 executable_ranges=[(377776, 524288)]
2026-09-11T17:58:55.445885Z  INFO local_candidate{attempt=1}: allocated package support memory linked_end=320152 profile_bytes=200 exchange_table_bytes=14104 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)]
2026-09-11T17:58:55.545060Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="place_storage"}: package build phase finished phase="place_storage" elapsed_ms=99 success=true
2026-09-11T17:58:55.561383Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T17:58:55.633289Z  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
2026-09-11T17:58:55.633361Z  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
2026-09-11T17:58:55.635398Z  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
2026-09-11T17:58:55.666434Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T17:58:55.671980Z  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
2026-09-11T17:58:55.672011Z  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
2026-09-11T17:58:55.677658Z  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
2026-09-11T17:58:55.704931Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T17:58:55.706533Z  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
2026-09-11T17:58:55.706580Z  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
2026-09-11T17:58:55.709829Z  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
2026-09-11T17:58:55.715022Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=5 transfers=127912 maximum_identical_destinations=1
2026-09-11T17:58:55.715080Z  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
2026-09-11T17:58:55.921128Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=5 tile=65 row_words=2640 horizon=9702
2026-09-11T17:58:56.491972Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T17:58:56.539232Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=9 transfers=61520 maximum_identical_destinations=1
2026-09-11T17:58:56.539276Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=9 initial_horizon=4507 selected_horizon=4507 endpoint_lower_bound=3640 lower_bound_gap=867 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:56.575886Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=9 tile=734 row_words=175 horizon=4507
2026-09-11T17:58:56.962767Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=8
2026-09-11T17:58:57.030095Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=8 transfers=75104 maximum_identical_destinations=1
2026-09-11T17:58:57.030148Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=8 initial_horizon=13470 selected_horizon=13470 endpoint_lower_bound=8832 lower_bound_gap=4638 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:57.074299Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=8 tile=78 row_words=318 horizon=13470
2026-09-11T17:58:57.487732Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T17:58:57.489697Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T17:58:57.490482Z  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
2026-09-11T17:58:57.490504Z  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
2026-09-11T17:58:57.492644Z  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
2026-09-11T17:58:57.509291Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=4
2026-09-11T17:58:57.510266Z  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
2026-09-11T17:58:57.510288Z  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
2026-09-11T17:58:57.512127Z  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
2026-09-11T17:58:57.602659Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T17:58:57.608495Z  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
2026-09-11T17:58:57.608529Z  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
2026-09-11T17:58:57.614576Z  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
2026-09-11T17:58:57.844342Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T17:58:57.844407Z  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
2026-09-11T17:58:57.915734Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T17:58:57.943477Z  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
2026-09-11T17:58:57.943517Z  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
2026-09-11T17:58:57.954026Z  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
2026-09-11T17:58:58.054571Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T17:58:58.437269Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=7 transfers=66880 maximum_identical_destinations=1
2026-09-11T17:58:58.437330Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=7 initial_horizon=8403 selected_horizon=8403 endpoint_lower_bound=3640 lower_bound_gap=4763 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:58:58.456564Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T17:58:58.481991Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=7 tile=363 row_words=286 horizon=8403
2026-09-11T17:58:58.502765Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=9 transfers=61520 maximum_identical_destinations=1
2026-09-11T17:58:58.502814Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=9 initial_horizon=4507 selected_horizon=4507 endpoint_lower_bound=3640 lower_bound_gap=867 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:58.541929Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=9 tile=734 row_words=175 horizon=4507
2026-09-11T17:58:58.719312Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T17:58:58.882323Z  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
2026-09-11T17:58:58.882389Z  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
2026-09-11T17:58:58.938439Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=8
2026-09-11T17:58:58.941760Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T17:58:59.004538Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=8 transfers=75104 maximum_identical_destinations=1
2026-09-11T17:58:59.004580Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=8 initial_horizon=13470 selected_horizon=13470 endpoint_lower_bound=8832 lower_bound_gap=4638 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:59.038605Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=6 transfers=33612 maximum_identical_destinations=1
2026-09-11T17:58:59.038653Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=6 initial_horizon=13194 selected_horizon=13194 endpoint_lower_bound=12336 lower_bound_gap=858 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:58:59.055522Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=8 tile=78 row_words=318 horizon=13470
2026-09-11T17:58:59.080757Z  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
2026-09-11T17:58:59.109690Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=6 tile=719 row_words=631 horizon=13194
2026-09-11T17:58:59.110817Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="plan_kernels"}: package build phase finished phase="plan_kernels" elapsed_ms=4 success=true
2026-09-11T17:58:59.112592Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="compile_kernels"}: package build phase finished phase="compile_kernels" elapsed_ms=1 success=true
2026-09-11T17:58:59.114282Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="link_runtime"}: package build phase finished phase="link_runtime" elapsed_ms=0 success=true
2026-09-11T17:58:59.144333Z  INFO local_candidate{attempt=3}: exchange table and repeat patch storage exchange_table_bytes=20180 maximum_uncompressed_repeat_patch_bytes=0 maximum_elided_arithmetic_patch_bytes=0
2026-09-11T17:58:59.303725Z  INFO 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
2026-09-11T17:58:59.303784Z  INFO local_candidate{attempt=3}: placing generated tile programs linked_end=319576 host_code_base=376832 host_code_bytes=860 generated_code_bytes=2608 exchange_table_bytes=20180 executable_ranges=[(377760, 524288)]
2026-09-11T17:58:59.303802Z  INFO local_candidate{attempt=3}: allocated package support memory linked_end=319576 profile_bytes=192 exchange_table_bytes=20180 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)]
2026-09-11T17:58:59.375930Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="place_storage"}: package build phase finished phase="place_storage" elapsed_ms=72 success=true
2026-09-11T17:58:59.425481Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T17:58:59.426042Z  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
2026-09-11T17:58:59.426058Z  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
2026-09-11T17:58:59.427952Z  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
2026-09-11T17:58:59.440383Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T17:58:59.470791Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=4
2026-09-11T17:58:59.472669Z  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
2026-09-11T17:58:59.472696Z  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
2026-09-11T17:58:59.477082Z  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
2026-09-11T17:58:59.517676Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T17:58:59.528639Z  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
2026-09-11T17:58:59.528736Z  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
2026-09-11T17:58:59.537356Z  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
2026-09-11T17:58:59.618188Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T17:58:59.652838Z  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
2026-09-11T17:58:59.652887Z  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
2026-09-11T17:58:59.665421Z  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
2026-09-11T17:58:59.837641Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T17:58:59.863141Z  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
2026-09-11T17:58:59.863175Z  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
2026-09-11T17:58:59.870438Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=5
2026-09-11T17:58:59.873456Z  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
2026-09-11T17:59:00.033036Z  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
2026-09-11T17:59:00.033090Z  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
2026-09-11T17:59:00.036852Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=7 transfers=66880 maximum_identical_destinations=1
2026-09-11T17:59:00.036915Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=7 initial_horizon=5840 selected_horizon=5840 endpoint_lower_bound=3640 lower_bound_gap=2200 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:59:00.082874Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=7 tile=363 row_words=277 horizon=5840
2026-09-11T17:59:00.212624Z  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
2026-09-11T17:59:00.357900Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T17:59:00.398647Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=9 transfers=61520 maximum_identical_destinations=1
2026-09-11T17:59:00.398690Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=9 initial_horizon=4507 selected_horizon=4507 endpoint_lower_bound=3640 lower_bound_gap=867 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:00.438370Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=9 tile=734 row_words=175 horizon=4507
2026-09-11T17:59:00.546756Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T17:59:00.661842Z  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
2026-09-11T17:59:00.661906Z  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
2026-09-11T17:59:00.878644Z  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
2026-09-11T17:59:00.907694Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: package build phase finished phase="lower_exchanges" elapsed_ms=5362 success=true
2026-09-11T17:59:01.014261Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T17:59:01.119989Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=6 transfers=33134 maximum_identical_destinations=1
2026-09-11T17:59:01.120035Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=6 initial_horizon=13272 selected_horizon=13272 endpoint_lower_bound=12336 lower_bound_gap=936 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:01.192582Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=6 tile=715 row_words=629 horizon=13272
2026-09-11T17:59:01.677169Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=5
2026-09-11T17:59:01.825673Z  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
2026-09-11T17:59:01.825739Z  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
2026-09-11T17:59:02.033058Z  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
2026-09-11T17:59:02.405015Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T17:59:02.512649Z  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
2026-09-11T17:59:02.512705Z  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
2026-09-11T17:59:02.616322Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=8 transfers=75104 maximum_identical_destinations=1
2026-09-11T17:59:02.616391Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=8 initial_horizon=13470 selected_horizon=13470 endpoint_lower_bound=8832 lower_bound_gap=4638 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:59:02.621522Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T17:59:02.664065Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=8 tile=78 row_words=318 horizon=13470
2026-09-11T17:59:02.676470Z  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
2026-09-11T17:59:02.735712Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=6 transfers=32656 maximum_identical_destinations=1
2026-09-11T17:59:02.735766Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=6 initial_horizon=7035 selected_horizon=7035 endpoint_lower_bound=6192 lower_bound_gap=843 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:02.815981Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=6 tile=385 row_words=620 horizon=7035
2026-09-11T17:59:03.284563Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T17:59:03.287551Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=4
2026-09-11T17:59:03.289889Z  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
2026-09-11T17:59:03.289915Z  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
2026-09-11T17:59:03.291891Z  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
2026-09-11T17:59:03.395605Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T17:59:03.401761Z  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
2026-09-11T17:59:03.401796Z  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
2026-09-11T17:59:03.407499Z  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
2026-09-11T17:59:04.242570Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T17:59:04.279542Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=9 transfers=61520 maximum_identical_destinations=1
2026-09-11T17:59:04.279586Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=9 initial_horizon=4507 selected_horizon=4507 endpoint_lower_bound=3640 lower_bound_gap=867 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:04.318389Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=9 tile=734 row_words=175 horizon=4507
2026-09-11T17:59:04.698178Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=8
2026-09-11T17:59:04.772438Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=8 transfers=75104 maximum_identical_destinations=1
2026-09-11T17:59:04.772481Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=8 initial_horizon=13470 selected_horizon=13470 endpoint_lower_bound=8832 lower_bound_gap=4638 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:04.819861Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=8 tile=78 row_words=318 horizon=13470
2026-09-11T17:59:05.626642Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=7 transfers=66880 maximum_identical_destinations=1
2026-09-11T17:59:05.626708Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=7 initial_horizon=8403 selected_horizon=8403 endpoint_lower_bound=3640 lower_bound_gap=4763 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:59:05.664982Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=7 tile=363 row_words=286 horizon=8403
2026-09-11T17:59:05.875269Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=7 transfers=66880 maximum_identical_destinations=1
2026-09-11T17:59:05.875338Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=7 initial_horizon=5840 selected_horizon=5840 endpoint_lower_bound=3640 lower_bound_gap=2200 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:59:05.919511Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=7 tile=363 row_words=277 horizon=5840
2026-09-11T17:59:05.994416Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T17:59:06.066142Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=6 transfers=33612 maximum_identical_destinations=1
2026-09-11T17:59:06.066190Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=6 initial_horizon=13194 selected_horizon=13194 endpoint_lower_bound=12336 lower_bound_gap=858 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:06.115771Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=6 tile=719 row_words=631 horizon=13194
2026-09-11T17:59:06.151104Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T17:59:06.151945Z  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
2026-09-11T17:59:06.151967Z  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
2026-09-11T17:59:06.154287Z  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
2026-09-11T17:59:06.420375Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T17:59:06.521701Z  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
2026-09-11T17:59:06.521764Z  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
2026-09-11T17:59:06.632398Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=5
2026-09-11T17:59:06.682081Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T17:59:06.710811Z  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
2026-09-11T17:59:06.711561Z  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
2026-09-11T17:59:06.711600Z  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
2026-09-11T17:59:06.723614Z  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
2026-09-11T17:59:06.723654Z  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
2026-09-11T17:59:06.724572Z  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
2026-09-11T17:59:06.909118Z  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
2026-09-11T17:59:06.965197Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: evaluated exchange placement candidate offset=12288 baseline_score=228000824320 score=105802398720 baseline_cycles=91614 candidate_cycles=89051 row_bytes=14072 row_capacity=16320 accepted=true
2026-09-11T17:59:07.084930Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: package build phase finished phase="optimize_exchange_placement" elapsed_ms=6177 success=true
2026-09-11T17:59:07.091542Z  INFO local_candidate{attempt=1}: costed final placed program final_cycles=250721 final_exchange=95651
2026-09-11T17:59:07.218421Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="prepare_tile_code"}: package build phase finished phase="prepare_tile_code" elapsed_ms=42 success=true
2026-09-11T17:59:07.250824Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="emit_tile_code"}: package build phase finished phase="emit_tile_code" elapsed_ms=32 success=true
2026-09-11T17:59:07.444848Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="build_tile_images"}: package build phase finished phase="build_tile_images" elapsed_ms=176 success=true
2026-09-11T17:59:08.127803Z  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
2026-09-11T17:59:08.127865Z  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
2026-09-11T17:59:08.279045Z  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
2026-09-11T17:59:08.313498Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: package build phase finished phase="lower_exchanges" elapsed_ms=8937 success=true
2026-09-11T17:59:08.344593Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: evaluated exchange placement candidate offset=12288 baseline_score=230353062912 score=108154637312 baseline_cycles=92263 candidate_cycles=89700 row_bytes=14680 row_capacity=16320 accepted=true
2026-09-11T17:59:08.455743Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: package build phase finished phase="optimize_exchange_placement" elapsed_ms=13130 success=true
2026-09-11T17:59:08.463392Z  INFO local_candidate{attempt=2}: costed final placed program final_cycles=253426 final_exchange=96300
2026-09-11T17:59:08.605594Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="prepare_tile_code"}: package build phase finished phase="prepare_tile_code" elapsed_ms=59 success=true
2026-09-11T17:59:08.635322Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="emit_tile_code"}: package build phase finished phase="emit_tile_code" elapsed_ms=29 success=true
2026-09-11T17:59:08.836530Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="build_tile_images"}: package build phase finished phase="build_tile_images" elapsed_ms=185 success=true
2026-09-11T17:59:10.625987Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T17:59:10.626848Z  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
2026-09-11T17:59:10.626871Z  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
2026-09-11T17:59:10.629322Z  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
2026-09-11T17:59:10.640124Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T17:59:10.670342Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=4
2026-09-11T17:59:10.671606Z  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
2026-09-11T17:59:10.671631Z  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
2026-09-11T17:59:10.673960Z  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
2026-09-11T17:59:10.706056Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T17:59:10.712650Z  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
2026-09-11T17:59:10.712706Z  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
2026-09-11T17:59:10.718948Z  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
2026-09-11T17:59:11.097391Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T17:59:11.126344Z  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
2026-09-11T17:59:11.126404Z  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
2026-09-11T17:59:11.137011Z  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
2026-09-11T17:59:11.562438Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T17:59:11.602622Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=9 transfers=61520 maximum_identical_destinations=1
2026-09-11T17:59:11.602666Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=9 initial_horizon=4507 selected_horizon=4507 endpoint_lower_bound=3640 lower_bound_gap=867 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:11.638826Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=9 tile=734 row_words=175 horizon=4507
2026-09-11T17:59:12.062420Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=8
2026-09-11T17:59:12.126854Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=8 transfers=75104 maximum_identical_destinations=1
2026-09-11T17:59:12.126894Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=8 initial_horizon=13470 selected_horizon=13470 endpoint_lower_bound=8832 lower_bound_gap=4638 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:12.172110Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=8 tile=78 row_words=318 horizon=13470
2026-09-11T17:59:13.078674Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=7 transfers=66880 maximum_identical_destinations=1
2026-09-11T17:59:13.078744Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=7 initial_horizon=5840 selected_horizon=5840 endpoint_lower_bound=3640 lower_bound_gap=2200 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:59:13.122302Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=7 tile=363 row_words=277 horizon=5840
2026-09-11T17:59:13.544736Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T17:59:13.633005Z  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
2026-09-11T17:59:13.633052Z  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
2026-09-11T17:59:13.652236Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T17:59:13.740769Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=6 transfers=32656 maximum_identical_destinations=1
2026-09-11T17:59:13.740812Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=6 initial_horizon=7035 selected_horizon=7035 endpoint_lower_bound=6192 lower_bound_gap=843 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:13.807275Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=6 tile=385 row_words=620 horizon=7035
2026-09-11T17:59:13.824272Z  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
2026-09-11T17:59:17.861750Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=5
2026-09-11T17:59:17.949556Z  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
2026-09-11T17:59:17.949612Z  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
2026-09-11T17:59:18.152900Z  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
2026-09-11T17:59:18.215415Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: evaluated exchange placement candidate offset=12288 baseline_score=233546102784 score=111347677184 baseline_cycles=85514 candidate_cycles=82951 row_bytes=20064 row_capacity=32704 accepted=true
2026-09-11T17:59:18.348508Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: package build phase finished phase="optimize_exchange_placement" elapsed_ms=10034 success=true
2026-09-11T17:59:18.361179Z  INFO local_candidate{attempt=3}: costed final placed program final_cycles=263463 final_exchange=89551
2026-09-11T17:59:18.463423Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="prepare_tile_code"}: package build phase finished phase="prepare_tile_code" elapsed_ms=42 success=true
2026-09-11T17:59:18.492970Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="emit_tile_code"}: package build phase finished phase="emit_tile_code" elapsed_ms=29 success=true
2026-09-11T17:59:18.639361Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="build_tile_images"}: package build phase finished phase="build_tile_images" elapsed_ms=130 success=true
2026-09-11T17:59:18.949869Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: accepted local layout improvement attempt=1 before=267659 after=250721 changed_operations=[] opened_boundaries=[]
2026-09-11T17:59:19.359887Z  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
2026-09-11T17:59:20.413398Z  INFO local_candidate{attempt=2}: screened exchange table geometry expansion_ms=779 expansion_and_footprint_ms=1053 estimated_row_bytes=21736 heuristic_row_bytes=39572 geometry_fragments_per_tile=2415 fragment_limit=16384
2026-09-11T17:59:20.431257Z  INFO local_candidate{attempt=2}: eliminated unread FP8 cast input padding clears removed=0
2026-09-11T17:59:20.530305Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=4 transfers=2182 maximum_identical_destinations=1
2026-09-11T17:59:20.530359Z  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
2026-09-11T17:59:20.531409Z  INFO local_candidate{attempt=2}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T17:59:20.532713Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=4 tile=134 row_words=39 horizon=7563
2026-09-11T17:59:20.532911Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T17:59:20.532938Z  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
2026-09-11T17:59:20.536018Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T17:59:20.594292Z  INFO local_candidate{attempt=2}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T17:59:20.603754Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T17:59:20.603805Z  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
2026-09-11T17:59:20.610316Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T17:59:20.623773Z  INFO local_candidate{attempt=3}: screened exchange table geometry expansion_ms=937 expansion_and_footprint_ms=1263 estimated_row_bytes=20200 heuristic_row_bytes=39572 geometry_fragments_per_tile=2223 fragment_limit=16384
2026-09-11T17:59:20.644178Z  INFO local_candidate{attempt=3}: eliminated unread FP8 cast input padding clears removed=0
2026-09-11T17:59:20.747405Z  INFO local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T17:59:20.754430Z  INFO local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T17:59:20.755296Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T17:59:20.755328Z  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
2026-09-11T17:59:20.756074Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=4 transfers=2182 maximum_identical_destinations=1
2026-09-11T17:59:20.756115Z  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
2026-09-11T17:59:20.758293Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=4 tile=165 row_words=39 horizon=7214
2026-09-11T17:59:20.758377Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T17:59:20.819720Z  INFO local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T17:59:20.825778Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T17:59:20.825810Z  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
2026-09-11T17:59:20.832331Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T17:59:21.222414Z  INFO local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T17:59:21.246827Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T17:59:21.246872Z  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
2026-09-11T17:59:21.256572Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T17:59:21.450486Z  INFO local_candidate{attempt=2}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T17:59:21.534633Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=9 transfers=61520 maximum_identical_destinations=1
2026-09-11T17:59:21.534675Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=9 initial_horizon=4507 selected_horizon=4507 endpoint_lower_bound=3640 lower_bound_gap=867 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:21.564954Z  INFO local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T17:59:21.572721Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=9 tile=734 row_words=175 horizon=4507
2026-09-11T17:59:21.624883Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=9 transfers=61520 maximum_identical_destinations=1
2026-09-11T17:59:21.624928Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=9 initial_horizon=4507 selected_horizon=4507 endpoint_lower_bound=3640 lower_bound_gap=867 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:21.657442Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=9 tile=734 row_words=175 horizon=4507
2026-09-11T17:59:21.949788Z  INFO local_candidate{attempt=2}: reused exchange optimization after validating relocated rows phase=8
2026-09-11T17:59:21.996927Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=8 transfers=75104 maximum_identical_destinations=1
2026-09-11T17:59:21.996967Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=8 initial_horizon=13470 selected_horizon=13470 endpoint_lower_bound=8832 lower_bound_gap=4638 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:22.045466Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=8 tile=78 row_words=318 horizon=13470
2026-09-11T17:59:22.198357Z  INFO local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=8
2026-09-11T17:59:22.256734Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=8 transfers=75104 maximum_identical_destinations=1
2026-09-11T17:59:22.256776Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=8 initial_horizon=13470 selected_horizon=13470 endpoint_lower_bound=8832 lower_bound_gap=4638 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:22.306896Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=8 tile=78 row_words=318 horizon=13470
2026-09-11T17:59:23.393269Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=7 transfers=66880 maximum_identical_destinations=1
2026-09-11T17:59:23.393337Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=7 initial_horizon=8430 selected_horizon=8430 endpoint_lower_bound=3640 lower_bound_gap=4790 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:59:23.430363Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=7 tile=363 row_words=286 horizon=8430
2026-09-11T17:59:23.600590Z  INFO local_candidate{attempt=2}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T17:59:23.712073Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T17:59:23.712155Z  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
2026-09-11T17:59:23.762995Z  INFO local_candidate{attempt=2}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T17:59:23.791063Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=7 transfers=66880 maximum_identical_destinations=1
2026-09-11T17:59:23.791118Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=7 initial_horizon=8430 selected_horizon=8430 endpoint_lower_bound=3640 lower_bound_gap=4790 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:59:23.829043Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=7 tile=363 row_words=286 horizon=8430
2026-09-11T17:59:23.847642Z  INFO local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T17:59:23.857264Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=6 transfers=33612 maximum_identical_destinations=1
2026-09-11T17:59:23.857303Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=6 initial_horizon=13194 selected_horizon=13194 endpoint_lower_bound=12336 lower_bound_gap=858 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:23.882173Z  INFO local_candidate{attempt=2}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T17:59:23.912922Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T17:59:23.925965Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=6 tile=719 row_words=631 horizon=13194
2026-09-11T17:59:23.926846Z  INFO local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T17:59:23.978490Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T17:59:23.978530Z  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
2026-09-11T17:59:24.019994Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=6 transfers=33612 maximum_identical_destinations=1
2026-09-11T17:59:24.020038Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=6 initial_horizon=13194 selected_horizon=13194 endpoint_lower_bound=12336 lower_bound_gap=858 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:24.085701Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=6 tile=719 row_words=631 horizon=13194
2026-09-11T17:59:24.186643Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T17:59:25.501198Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=5 transfers=128156 maximum_identical_destinations=1
2026-09-11T17:59:25.501285Z  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
2026-09-11T17:59:25.683836Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=5 tile=154 row_words=1079 horizon=7378
2026-09-11T17:59:26.375194Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=5 transfers=128060 maximum_identical_destinations=1
2026-09-11T17:59:26.375279Z  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
2026-09-11T17:59:26.515487Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=5 tile=142 row_words=932 horizon=7428
2026-09-11T17:59:26.550686Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="plan_kernels"}: package build phase finished phase="plan_kernels" elapsed_ms=4 success=true
2026-09-11T17:59:26.552638Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="compile_kernels"}: package build phase finished phase="compile_kernels" elapsed_ms=1 success=true
2026-09-11T17:59:26.554418Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="link_runtime"}: package build phase finished phase="link_runtime" elapsed_ms=0 success=true
2026-09-11T17:59:26.586788Z  INFO local_candidate{attempt=3}: exchange table and repeat patch storage exchange_table_bytes=13416 maximum_uncompressed_repeat_patch_bytes=0 maximum_elided_arithmetic_patch_bytes=0
2026-09-11T17:59:26.730118Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="size_tile_code"}: package build phase finished phase="size_tile_code" elapsed_ms=26 success=true
2026-09-11T17:59:26.730192Z  INFO local_candidate{attempt=3}: placing generated tile programs linked_end=320184 host_code_base=376832 host_code_bytes=876 generated_code_bytes=2692 exchange_table_bytes=13416 executable_ranges=[(377776, 524288)]
2026-09-11T17:59:26.730225Z  INFO local_candidate{attempt=3}: allocated package support memory linked_end=320184 profile_bytes=200 exchange_table_bytes=13416 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)]
2026-09-11T17:59:26.799890Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="place_storage"}: package build phase finished phase="place_storage" elapsed_ms=69 success=true
2026-09-11T17:59:26.814358Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T17:59:26.818295Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T17:59:26.818988Z  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
2026-09-11T17:59:26.819006Z  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
2026-09-11T17:59:26.821527Z  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
2026-09-11T17:59:26.861768Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=4
2026-09-11T17:59:26.863011Z  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
2026-09-11T17:59:26.863033Z  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
2026-09-11T17:59:26.865685Z  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
2026-09-11T17:59:26.921810Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T17:59:26.928264Z  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
2026-09-11T17:59:26.928306Z  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
2026-09-11T17:59:26.934305Z  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
2026-09-11T17:59:26.997307Z  INFO local_candidate{attempt=2}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T17:59:27.027027Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T17:59:27.027059Z  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
2026-09-11T17:59:27.039139Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T17:59:27.051463Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="plan_kernels"}: package build phase finished phase="plan_kernels" elapsed_ms=4 success=true
2026-09-11T17:59:27.053443Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="compile_kernels"}: package build phase finished phase="compile_kernels" elapsed_ms=1 success=true
2026-09-11T17:59:27.055102Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="link_runtime"}: package build phase finished phase="link_runtime" elapsed_ms=0 success=true
2026-09-11T17:59:27.085396Z  INFO local_candidate{attempt=2}: exchange table and repeat patch storage exchange_table_bytes=14000 maximum_uncompressed_repeat_patch_bytes=0 maximum_elided_arithmetic_patch_bytes=0
2026-09-11T17:59:27.236078Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="size_tile_code"}: package build phase finished phase="size_tile_code" elapsed_ms=32 success=true
2026-09-11T17:59:27.236123Z  INFO local_candidate{attempt=2}: placing generated tile programs linked_end=320152 host_code_base=376832 host_code_bytes=876 generated_code_bytes=2644 exchange_table_bytes=14000 executable_ranges=[(377776, 524288)]
2026-09-11T17:59:27.236139Z  INFO local_candidate{attempt=2}: allocated package support memory linked_end=320152 profile_bytes=200 exchange_table_bytes=14000 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)]
2026-09-11T17:59:27.312155Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="place_storage"}: package build phase finished phase="place_storage" elapsed_ms=76 success=true
2026-09-11T17:59:27.330405Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T17:59:27.331021Z  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
2026-09-11T17:59:27.331039Z  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
2026-09-11T17:59:27.333077Z  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
2026-09-11T17:59:27.335435Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=4
2026-09-11T17:59:27.336464Z  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
2026-09-11T17:59:27.336488Z  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
2026-09-11T17:59:27.339353Z  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
2026-09-11T17:59:27.715394Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T17:59:27.755426Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=9 transfers=61520 maximum_identical_destinations=1
2026-09-11T17:59:27.755473Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=9 initial_horizon=4507 selected_horizon=4507 endpoint_lower_bound=3640 lower_bound_gap=867 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:27.793102Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=9 tile=734 row_words=175 horizon=4507
2026-09-11T17:59:28.282328Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=8
2026-09-11T17:59:28.359502Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=8 transfers=75104 maximum_identical_destinations=1
2026-09-11T17:59:28.359570Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=8 initial_horizon=13470 selected_horizon=13470 endpoint_lower_bound=8832 lower_bound_gap=4638 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:28.411528Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=8 tile=78 row_words=318 horizon=13470
2026-09-11T17:59:29.476804Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=7 transfers=66880 maximum_identical_destinations=1
2026-09-11T17:59:29.476873Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=7 initial_horizon=8403 selected_horizon=8403 endpoint_lower_bound=3640 lower_bound_gap=4763 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:59:29.513298Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=7 tile=363 row_words=286 horizon=8403
2026-09-11T17:59:29.829780Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T17:59:29.954693Z  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
2026-09-11T17:59:29.954745Z  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
2026-09-11T17:59:30.074874Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T17:59:30.103232Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=7 transfers=66880 maximum_identical_destinations=1
2026-09-11T17:59:30.103304Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=7 initial_horizon=8403 selected_horizon=8403 endpoint_lower_bound=3640 lower_bound_gap=4763 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:59:30.140590Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=7 tile=363 row_words=286 horizon=8403
2026-09-11T17:59:30.146166Z  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
2026-09-11T17:59:30.166439Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=6 transfers=33612 maximum_identical_destinations=1
2026-09-11T17:59:30.166483Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=6 initial_horizon=13194 selected_horizon=13194 endpoint_lower_bound=12336 lower_bound_gap=858 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:30.235317Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T17:59:30.235621Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=6 tile=719 row_words=631 horizon=13194
2026-09-11T17:59:30.243895Z  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
2026-09-11T17:59:30.243928Z  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
2026-09-11T17:59:30.250033Z  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
2026-09-11T17:59:30.273066Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T17:59:30.361408Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T17:59:30.461226Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=6 transfers=33612 maximum_identical_destinations=1
2026-09-11T17:59:30.461284Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=6 initial_horizon=13194 selected_horizon=13194 endpoint_lower_bound=12336 lower_bound_gap=858 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:30.532714Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=6 tile=719 row_words=631 horizon=13194
2026-09-11T17:59:30.616310Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T17:59:30.643301Z  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
2026-09-11T17:59:30.643336Z  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
2026-09-11T17:59:30.653310Z  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
2026-09-11T17:59:31.069344Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T17:59:31.110187Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=9 transfers=61520 maximum_identical_destinations=1
2026-09-11T17:59:31.110249Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=9 initial_horizon=4507 selected_horizon=4507 endpoint_lower_bound=3640 lower_bound_gap=867 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:31.148036Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=9 tile=734 row_words=175 horizon=4507
2026-09-11T17:59:31.649538Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=8
2026-09-11T17:59:31.692262Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=8 transfers=75104 maximum_identical_destinations=1
2026-09-11T17:59:31.692304Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=8 initial_horizon=13470 selected_horizon=13470 endpoint_lower_bound=8832 lower_bound_gap=4638 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:31.736923Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=8 tile=78 row_words=318 horizon=13470
2026-09-11T17:59:32.203871Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T17:59:32.230856Z  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
2026-09-11T17:59:32.230892Z  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
2026-09-11T17:59:32.241602Z  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
2026-09-11T17:59:33.471254Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T17:59:33.553539Z  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
2026-09-11T17:59:33.553584Z  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
2026-09-11T17:59:33.748257Z  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
2026-09-11T17:59:34.153159Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=5
2026-09-11T17:59:34.223294Z  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
2026-09-11T17:59:34.223336Z  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
2026-09-11T17:59:34.394361Z  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
2026-09-11T17:59:34.422716Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: package build phase finished phase="lower_exchanges" elapsed_ms=7110 success=true
2026-09-11T17:59:36.697667Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T17:59:36.710137Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T17:59:36.711392Z  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
2026-09-11T17:59:36.711426Z  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
2026-09-11T17:59:36.714725Z  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
2026-09-11T17:59:36.762028Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=4
2026-09-11T17:59:36.763603Z  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
2026-09-11T17:59:36.763633Z  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
2026-09-11T17:59:36.768274Z  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
2026-09-11T17:59:36.800608Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T17:59:36.808375Z  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
2026-09-11T17:59:36.808411Z  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
2026-09-11T17:59:36.815949Z  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
2026-09-11T17:59:38.094933Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=8
2026-09-11T17:59:38.140231Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=8 transfers=75104 maximum_identical_destinations=1
2026-09-11T17:59:38.140285Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=8 initial_horizon=13470 selected_horizon=13470 endpoint_lower_bound=8832 lower_bound_gap=4638 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:38.184900Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=8 tile=78 row_words=318 horizon=13470
2026-09-11T17:59:38.721281Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=5
2026-09-11T17:59:38.847248Z  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
2026-09-11T17:59:38.847290Z  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
2026-09-11T17:59:38.992437Z  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
2026-09-11T17:59:39.069602Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=7 transfers=66880 maximum_identical_destinations=1
2026-09-11T17:59:39.069668Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=7 initial_horizon=5840 selected_horizon=5840 endpoint_lower_bound=3640 lower_bound_gap=2200 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:59:39.123361Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=7 tile=363 row_words=277 horizon=5840
2026-09-11T17:59:39.615687Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T17:59:39.714144Z  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
2026-09-11T17:59:39.714194Z  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
2026-09-11T17:59:39.885299Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T17:59:39.918312Z  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
2026-09-11T17:59:39.944410Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: package build phase finished phase="lower_exchanges" elapsed_ms=13144 success=true
2026-09-11T17:59:39.970546Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=6 transfers=33612 maximum_identical_destinations=1
2026-09-11T17:59:39.970580Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=6 initial_horizon=13194 selected_horizon=13194 endpoint_lower_bound=12336 lower_bound_gap=858 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:40.037082Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=6 tile=719 row_words=631 horizon=13194
2026-09-11T17:59:40.646102Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=5
2026-09-11T17:59:40.734910Z  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
2026-09-11T17:59:40.734964Z  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
2026-09-11T17:59:40.910494Z  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
2026-09-11T17:59:41.029273Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T17:59:41.084983Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=9 transfers=61520 maximum_identical_destinations=1
2026-09-11T17:59:41.085046Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=9 initial_horizon=4507 selected_horizon=4507 endpoint_lower_bound=3640 lower_bound_gap=867 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:41.122438Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=9 tile=734 row_words=175 horizon=4507
2026-09-11T17:59:41.607132Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T17:59:41.635415Z  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
2026-09-11T17:59:41.635467Z  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
2026-09-11T17:59:41.649883Z  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
2026-09-11T17:59:41.690333Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: evaluated exchange placement candidate offset=12288 baseline_score=239281369088 score=117082943488 baseline_cycles=89370 candidate_cycles=86807 row_bytes=13968 row_capacity=16320 accepted=true
2026-09-11T17:59:41.824438Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: package build phase finished phase="optimize_exchange_placement" elapsed_ms=7401 success=true
2026-09-11T17:59:41.834964Z  INFO local_candidate{attempt=2}: costed final placed program final_cycles=246983 final_exchange=93407
2026-09-11T17:59:41.968798Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="prepare_tile_code"}: package build phase finished phase="prepare_tile_code" elapsed_ms=50 success=true
2026-09-11T17:59:42.002026Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="emit_tile_code"}: package build phase finished phase="emit_tile_code" elapsed_ms=33 success=true
2026-09-11T17:59:42.193219Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="build_tile_images"}: package build phase finished phase="build_tile_images" elapsed_ms=173 success=true
2026-09-11T17:59:42.404142Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=4
2026-09-11T17:59:42.405221Z  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
2026-09-11T17:59:42.405251Z  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
2026-09-11T17:59:42.407808Z  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
2026-09-11T17:59:42.444262Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T17:59:42.488643Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T17:59:42.495474Z  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
2026-09-11T17:59:42.495503Z  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
2026-09-11T17:59:42.500644Z  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
2026-09-11T17:59:42.514877Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T17:59:42.516156Z  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
2026-09-11T17:59:42.516174Z  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
2026-09-11T17:59:42.517899Z  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
2026-09-11T17:59:42.864255Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T17:59:42.891063Z  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
2026-09-11T17:59:42.891104Z  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
2026-09-11T17:59:42.900905Z  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
2026-09-11T17:59:43.324080Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T17:59:43.360532Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=9 transfers=61520 maximum_identical_destinations=1
2026-09-11T17:59:43.360574Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=9 initial_horizon=4507 selected_horizon=4507 endpoint_lower_bound=3640 lower_bound_gap=867 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:43.401756Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=9 tile=734 row_words=175 horizon=4507
2026-09-11T17:59:43.870614Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=8
2026-09-11T17:59:43.917894Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=8 transfers=75104 maximum_identical_destinations=1
2026-09-11T17:59:43.917935Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=8 initial_horizon=13470 selected_horizon=13470 endpoint_lower_bound=8832 lower_bound_gap=4638 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:43.969981Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=8 tile=78 row_words=318 horizon=13470
2026-09-11T17:59:44.945012Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=7 transfers=66880 maximum_identical_destinations=1
2026-09-11T17:59:44.945082Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=7 initial_horizon=5840 selected_horizon=5840 endpoint_lower_bound=3640 lower_bound_gap=2200 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:59:44.987564Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=7 tile=363 row_words=277 horizon=5840
2026-09-11T17:59:45.350770Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T17:59:45.447587Z  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
2026-09-11T17:59:45.447667Z  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
2026-09-11T17:59:45.657276Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T17:59:45.659784Z  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
2026-09-11T17:59:45.744902Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=6 transfers=33612 maximum_identical_destinations=1
2026-09-11T17:59:45.744950Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=6 initial_horizon=13194 selected_horizon=13194 endpoint_lower_bound=12336 lower_bound_gap=858 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:45.815592Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=6 tile=719 row_words=631 horizon=13194
2026-09-11T17:59:46.708652Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=5
2026-09-11T17:59:46.793331Z  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
2026-09-11T17:59:46.793370Z  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
2026-09-11T17:59:46.924931Z  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
2026-09-11T17:59:46.984282Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: evaluated exchange placement candidate offset=12288 baseline_score=239710250496 score=117511824896 baseline_cycles=89071 candidate_cycles=86508 row_bytes=13384 row_capacity=16320 accepted=true
2026-09-11T17:59:47.122320Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: package build phase finished phase="optimize_exchange_placement" elapsed_ms=7177 success=true
2026-09-11T17:59:47.129368Z  INFO local_candidate{attempt=3}: costed final placed program final_cycles=247432 final_exchange=93108
2026-09-11T17:59:47.255378Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="prepare_tile_code"}: package build phase finished phase="prepare_tile_code" elapsed_ms=46 success=true
2026-09-11T17:59:47.289515Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="emit_tile_code"}: package build phase finished phase="emit_tile_code" elapsed_ms=34 success=true
2026-09-11T17:59:47.484020Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="build_tile_images"}: package build phase finished phase="build_tile_images" elapsed_ms=177 success=true
2026-09-11T17:59:47.854923Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: accepted local layout improvement attempt=2 before=250721 after=246983 changed_operations=[4] opened_boundaries=[3]
2026-09-11T17:59:48.320371Z  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
2026-09-11T17:59:49.647863Z  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=1007 expansion_and_footprint_ms=1327 estimated_row_bytes=19784 heuristic_row_bytes=37952 geometry_fragments_per_tile=2172 fragment_limit=16384
2026-09-11T17:59:49.669247Z  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
2026-09-11T17:59:49.778169Z  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
2026-09-11T17:59:49.779381Z  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
2026-09-11T17:59:49.779426Z  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
2026-09-11T17:59:49.783146Z  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
2026-09-11T17:59:49.787450Z  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
2026-09-11T17:59:49.787503Z  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
2026-09-11T17:59:49.789381Z  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
2026-09-11T17:59:49.820110Z  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
2026-09-11T17:59:49.838786Z  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
2026-09-11T17:59:49.848362Z  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
2026-09-11T17:59:49.848418Z  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
2026-09-11T17:59:49.856719Z  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
2026-09-11T17:59:50.673528Z  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
2026-09-11T17:59:50.707253Z  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=61520 maximum_identical_destinations=1
2026-09-11T17:59:50.707316Z  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=4507 selected_horizon=4507 endpoint_lower_bound=3640 lower_bound_gap=867 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:50.753060Z  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=734 row_words=175 horizon=4507
2026-09-11T17:59:51.220919Z  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
2026-09-11T17:59:51.276356Z  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=75104 maximum_identical_destinations=1
2026-09-11T17:59:51.276404Z  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=13470 selected_horizon=13470 endpoint_lower_bound=8832 lower_bound_gap=4638 selected_kind="reused" neighborhood_improvements=0
2026-09-11T17:59:51.325076Z  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=318 horizon=13470
2026-09-11T17:59:52.556404Z  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=66880 maximum_identical_destinations=1
2026-09-11T17:59:52.556469Z  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=8430 selected_horizon=8430 endpoint_lower_bound=3640 lower_bound_gap=4790 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:59:52.596317Z  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=363 row_words=286 horizon=8430
2026-09-11T17:59:52.778044Z  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
2026-09-11T17:59:52.910417Z  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
2026-09-11T17:59:52.910470Z  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
2026-09-11T17:59:53.123096Z  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
2026-09-11T17:59:55.853172Z  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
2026-09-11T17:59:55.853277Z  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
2026-09-11T17:59:56.013269Z  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
2026-09-11T17:59:59.585498Z  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=33612 maximum_identical_destinations=1
2026-09-11T17:59:59.585578Z  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=13194 selected_horizon=13194 endpoint_lower_bound=12336 lower_bound_gap=858 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T17:59:59.650481Z  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=719 row_words=632 horizon=13194
2026-09-11T18:00:00.194943Z  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
2026-09-11T18:00:00.224070Z  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
2026-09-11T18:00:00.224107Z  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
2026-09-11T18:00:00.236432Z  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
2026-09-11T18:00:00.262466Z  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=18 success=true
2026-09-11T18:00:00.264513Z  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
2026-09-11T18:00:00.266409Z  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
2026-09-11T18:00:00.300252Z  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=13288 maximum_uncompressed_repeat_patch_bytes=0 maximum_elided_arithmetic_patch_bytes=0
2026-09-11T18:00:00.452740Z  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=28 success=true
2026-09-11T18:00:00.452835Z  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=320184 host_code_base=376832 host_code_bytes=876 generated_code_bytes=2612 exchange_table_bytes=13288 executable_ranges=[(377776, 524288)]
2026-09-11T18:00:00.452865Z  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=320184 profile_bytes=200 exchange_table_bytes=13288 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)]
2026-09-11T18:00:00.532195Z  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=79 success=true
2026-09-11T18:00:00.567280Z  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
2026-09-11T18:00:00.568378Z  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
2026-09-11T18:00:00.568403Z  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
2026-09-11T18:00:00.570310Z  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
2026-09-11T18:00:00.585485Z  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
2026-09-11T18:00:00.586578Z  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
2026-09-11T18:00:00.586613Z  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
2026-09-11T18:00:00.588515Z  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
2026-09-11T18:00:00.606029Z  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
2026-09-11T18:00:00.622371Z  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
2026-09-11T18:00:00.629708Z  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
2026-09-11T18:00:00.629752Z  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
2026-09-11T18:00:00.636745Z  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
2026-09-11T18:00:01.520030Z  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
2026-09-11T18:00:01.574975Z  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=61520 maximum_identical_destinations=1
2026-09-11T18:00:01.575032Z  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=4507 selected_horizon=4507 endpoint_lower_bound=3640 lower_bound_gap=867 selected_kind="reused" neighborhood_improvements=0
2026-09-11T18:00:01.614386Z  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=734 row_words=175 horizon=4507
2026-09-11T18:00:02.013115Z  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
2026-09-11T18:00:02.057230Z  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=75104 maximum_identical_destinations=1
2026-09-11T18:00:02.057274Z  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=13470 selected_horizon=13470 endpoint_lower_bound=8832 lower_bound_gap=4638 selected_kind="reused" neighborhood_improvements=0
2026-09-11T18:00:02.105496Z  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=318 horizon=13470
2026-09-11T18:00:02.619503Z  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
2026-09-11T18:00:02.651222Z  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
2026-09-11T18:00:02.651281Z  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
2026-09-11T18:00:02.669656Z  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
2026-09-11T18:00:03.401306Z  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=66880 maximum_identical_destinations=1
2026-09-11T18:00:03.401380Z  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=8403 selected_horizon=8403 endpoint_lower_bound=3640 lower_bound_gap=4763 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T18:00:03.439773Z  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=363 row_words=286 horizon=8403
2026-09-11T18:00:03.629086Z  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
2026-09-11T18:00:03.722434Z  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
2026-09-11T18:00:03.722482Z  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
2026-09-11T18:00:03.755124Z  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
2026-09-11T18:00:03.842661Z  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=33612 maximum_identical_destinations=1
2026-09-11T18:00:03.842708Z  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=13194 selected_horizon=13194 endpoint_lower_bound=12336 lower_bound_gap=858 selected_kind="reused" neighborhood_improvements=0
2026-09-11T18:00:03.908261Z  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=719 row_words=632 horizon=13194
2026-09-11T18:00:03.946589Z  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
2026-09-11T18:00:04.612626Z  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
2026-09-11T18:00:04.692790Z  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
2026-09-11T18:00:04.692829Z  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
2026-09-11T18:00:04.833674Z  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
2026-09-11T18:00:04.859339Z  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=4327 success=true
2026-09-11T18:00:07.166133Z  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
2026-09-11T18:00:07.167169Z  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
2026-09-11T18:00:07.167234Z  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
2026-09-11T18:00:07.170662Z  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
2026-09-11T18:00:07.217113Z  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
2026-09-11T18:00:07.218260Z  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
2026-09-11T18:00:07.218286Z  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
2026-09-11T18:00:07.221707Z  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
2026-09-11T18:00:07.245686Z  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
2026-09-11T18:00:07.255327Z  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
2026-09-11T18:00:07.255370Z  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
2026-09-11T18:00:07.263361Z  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
2026-09-11T18:00:08.132697Z  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
2026-09-11T18:00:08.171034Z  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=61520 maximum_identical_destinations=1
2026-09-11T18:00:08.171082Z  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=4507 selected_horizon=4507 endpoint_lower_bound=3640 lower_bound_gap=867 selected_kind="reused" neighborhood_improvements=0
2026-09-11T18:00:08.208479Z  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=734 row_words=175 horizon=4507
2026-09-11T18:00:08.611140Z  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
2026-09-11T18:00:08.682476Z  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=75104 maximum_identical_destinations=1
2026-09-11T18:00:08.682527Z  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=13470 selected_horizon=13470 endpoint_lower_bound=8832 lower_bound_gap=4638 selected_kind="reused" neighborhood_improvements=0
2026-09-11T18:00:08.734098Z  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=318 horizon=13470
2026-09-11T18:00:08.770614Z  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
2026-09-11T18:00:09.658531Z  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=66880 maximum_identical_destinations=1
2026-09-11T18:00:09.658606Z  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=5840 selected_horizon=5840 endpoint_lower_bound=3640 lower_bound_gap=2200 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T18:00:09.704002Z  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=363 row_words=277 horizon=5840
2026-09-11T18:00:10.370245Z  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
2026-09-11T18:00:10.414142Z  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
2026-09-11T18:00:10.471569Z  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
2026-09-11T18:00:10.471618Z  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
2026-09-11T18:00:10.507740Z  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=33612 maximum_identical_destinations=1
2026-09-11T18:00:10.507785Z  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=13194 selected_horizon=13194 endpoint_lower_bound=12336 lower_bound_gap=858 selected_kind="reused" neighborhood_improvements=0
2026-09-11T18:00:10.575508Z  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=719 row_words=632 horizon=13194
2026-09-11T18:00:10.717535Z  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
2026-09-11T18:00:11.150539Z  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
2026-09-11T18:00:11.165527Z  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
2026-09-11T18:00:11.179675Z  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
2026-09-11T18:00:11.179710Z  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
2026-09-11T18:00:11.193166Z  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
2026-09-11T18:00:11.248192Z  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
2026-09-11T18:00:11.248262Z  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
2026-09-11T18:00:11.377423Z  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
2026-09-11T18:00:11.435216Z  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=12288 baseline_score=245345083648 score=123146658048 baseline_cycles=85509 candidate_cycles=82946 row_bytes=13256 row_capacity=16320 accepted=true
2026-09-11T18:00:11.575115Z  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=6715 success=true
2026-09-11T18:00:11.581849Z  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=242376 final_exchange=89546
2026-09-11T18:00:11.703610Z  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=44 success=true
2026-09-11T18:00:11.733475Z  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=29 success=true
2026-09-11T18:00:11.917248Z  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=167 success=true
2026-09-11T18:00:11.999879Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: accepted local layout improvement attempt=3 before=246983 after=242376 changed_operations=[5] opened_boundaries=[4]
2026-09-11T18:00:12.404940Z  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=135940 success=true
2026-09-11T18:00:12.506340Z  INFO writing application package tiles=1472
2026-09-11T18:00:12.624603Z  INFO application package written
2026-09-11T18:00:12.625116Z  INFO reading application package
2026-09-11T18:00:12.836133Z  INFO application package read tiles=1472 compiler=0.1.0
2026-09-11T18:00:12.839898Z  INFO waiting for hardware ownership path=artifacts/layout-sweep/device.lock
2026-09-11T18:00:12.839921Z  INFO acquired hardware ownership path=artifacts/layout-sweep/device.lock
2026-09-11T18:00:12.840221Z  INFO opening IPU device path="/dev/ipu0"
2026-09-11T18:00:12.840268Z  INFO IPU device attached path=/dev/ipu0
2026-09-11T18:00:12.840272Z  INFO initializing IPU device
2026-09-11T18:00:12.848499Z  INFO IPU device initialized
2026-09-11T18:00:12.848541Z  INFO replaying device configuration register_writes=2003
2026-09-11T18:00:12.855422Z  INFO loading application tile_count=1472 final_mark=23
2026-09-11T18:00:13.046942Z  INFO application loaded and initial synchronization completed tile_count=1472
2026-09-11T18:00:13.713168Z  INFO prepared reference inputs elapsed_ms=664
2026-09-11T18:00:14.011565Z  INFO configured host reference BLAS threads=4
referencePrecision=device
2026-09-11T18:00:14.314025Z  INFO evaluated host reference elapsed_ms=600
2026-09-11T18:00:14.316505Z  INFO starting host exchange session startup_mark=23
2026-09-11T18:00:14.316579Z  INFO attaching host exchange pages pages=2
2026-09-11T18:00:14.317230Z  INFO host exchange session started
2026-09-11T18:00:14.317273Z  INFO invoking streaming host exchange call call="initialize" command=0 phases=2
2026-09-11T18:00:14.320845Z  INFO invoking streaming host exchange call call="run" command=0 phases=17
profile=artifacts/attention-grids-20260911/baseline/model.ipuprof tiles=1472 samples=50945
referenceInference=1 numericalTest=PASS
referenceMaximumAbsoluteError=0.000061 numericalTest=PASS
package=artifacts/attention-grids-20260911/baseline/model.ipuexe tiles=1472 hardwareTest=PASS