2026-09-06T19:13:00.440282Z  INFO applied GEMM plan constraint source_operation=2 matching_plans=4 constraint=GemmPlanConstraint { source_operation: 2, orientation: Swapped, row_partitions: 16, column_partitions: 46, inner_partitions: 2, result_row_partitions: 1, result_column_partitions: 1, output_column_block: 16, weight_memory_class: Ipu21Standard, reduction_staging: Complete, local_weight_staging: Direct }
2026-09-06T19:13:00.532284Z  INFO retained operator-plan finalist finalist=0 values=12 operations=8 estimated_cycles=507798 estimated_exchange_cycles=218520 exchange_row_bytes=44844 peak_standard_bytes=269356 peak_interleaved_bytes=59008 peak_total_bytes=306028 maximum_standard_allocation_bytes=98304 active_tile_counts={192, 480, 736, 1472} padding_group_counts={16} conversion_sources=[Some(OperationId(2))]
2026-09-06T19:13:00.541774Z  INFO retained operator-plan finalist finalist=1 values=13 operations=9 estimated_cycles=509927 estimated_exchange_cycles=218040 exchange_row_bytes=44736 peak_standard_bytes=355264 peak_interleaved_bytes=57408 peak_total_bytes=394752 maximum_standard_allocation_bytes=98304 active_tile_counts={192, 480, 736, 1472} padding_group_counts={16} conversion_sources=[Some(OperationId(1)), Some(OperationId(2))]
2026-09-06T19:13:00.557147Z  INFO retained operator-plan finalist finalist=2 values=11 operations=7 estimated_cycles=510584 estimated_exchange_cycles=216600 exchange_row_bytes=44412 peak_standard_bytes=357756 peak_interleaved_bytes=55808 peak_total_bytes=408956 maximum_standard_allocation_bytes=98304 active_tile_counts={192, 736, 1472} padding_group_counts={} conversion_sources=[]
2026-09-06T19:13:00.578471Z  INFO retained operator-plan finalist finalist=3 values=12 operations=8 estimated_cycles=510584 estimated_exchange_cycles=216600 exchange_row_bytes=44412 peak_standard_bytes=339324 peak_interleaved_bytes=71936 peak_total_bytes=408956 maximum_standard_allocation_bytes=98304 active_tile_counts={192, 736, 1472} padding_group_counts={} conversion_sources=[Some(OperationId(2))]
2026-09-06T19:13:02.119750Z  INFO applied GEMM plan constraint source_operation=2 matching_plans=4 constraint=GemmPlanConstraint { source_operation: 2, orientation: Swapped, row_partitions: 16, column_partitions: 46, inner_partitions: 2, result_row_partitions: 1, result_column_partitions: 1, output_column_block: 16, weight_memory_class: Ipu21Standard, reduction_staging: Complete, local_weight_staging: Direct }
2026-09-06T19:13:02.205566Z  INFO retained operator-plan finalist finalist=0 values=12 operations=8 estimated_cycles=507798 estimated_exchange_cycles=218520 exchange_row_bytes=44844 peak_standard_bytes=269356 peak_interleaved_bytes=59008 peak_total_bytes=306028 maximum_standard_allocation_bytes=98304 active_tile_counts={192, 480, 736, 1472} padding_group_counts={16} conversion_sources=[Some(OperationId(2))]
2026-09-06T19:13:02.215056Z  INFO retained operator-plan finalist finalist=1 values=13 operations=9 estimated_cycles=509927 estimated_exchange_cycles=218040 exchange_row_bytes=44736 peak_standard_bytes=355264 peak_interleaved_bytes=57408 peak_total_bytes=394752 maximum_standard_allocation_bytes=98304 active_tile_counts={192, 480, 736, 1472} padding_group_counts={16} conversion_sources=[Some(OperationId(1)), Some(OperationId(2))]
2026-09-06T19:13:02.230436Z  INFO retained operator-plan finalist finalist=2 values=11 operations=7 estimated_cycles=510584 estimated_exchange_cycles=216600 exchange_row_bytes=44412 peak_standard_bytes=357756 peak_interleaved_bytes=55808 peak_total_bytes=408956 maximum_standard_allocation_bytes=98304 active_tile_counts={192, 736, 1472} padding_group_counts={} conversion_sources=[]
2026-09-06T19:13:02.251711Z  INFO retained operator-plan finalist finalist=3 values=12 operations=8 estimated_cycles=510584 estimated_exchange_cycles=216600 exchange_row_bytes=44412 peak_standard_bytes=339324 peak_interleaved_bytes=71936 peak_total_bytes=408956 maximum_standard_allocation_bytes=98304 active_tile_counts={192, 736, 1472} padding_group_counts={} conversion_sources=[Some(OperationId(2))]
2026-09-06T19:13:02.343431Z  INFO ipu_codegen.package.phase{phase="lower_mid"}: package build phase finished phase="lower_mid" elapsed_ms=3851 success=true
2026-09-06T19:13:20.354433Z  INFO screened tile mappings by exchange resource load candidates=65 baseline_cycles=81248 candidate_cycles=74336 baseline_pressure=78346 candidate_pressure=71434
2026-09-06T19:13:20.524738Z  INFO modelled expanded operator plan finalist=2 modelled_cycles=375636 estimated_cycles=424044 estimated_exchange_cycles=135344
2026-09-06T19:13:21.091108Z  INFO screened tile mappings by exchange resource load candidates=65 baseline_cycles=93692 candidate_cycles=86780 baseline_pressure=78346 candidate_pressure=75877
2026-09-06T19:13:21.223355Z  INFO modelled expanded operator plan finalist=3 modelled_cycles=379224 estimated_cycles=415188 estimated_exchange_cycles=135344
2026-09-06T19:13:38.533895Z  INFO screened tile mappings by exchange resource load candidates=139 baseline_cycles=119232 candidate_cycles=119232 baseline_pressure=80002 candidate_pressure=80002
2026-09-06T19:13:38.768871Z  INFO modelled expanded operator plan finalist=1 modelled_cycles=533101 estimated_cycles=778853 estimated_exchange_cycles=377584
2026-09-06T19:13:40.749566Z  INFO screened tile mappings by exchange resource load candidates=139 baseline_cycles=100544 candidate_cycles=100544 baseline_pressure=78600 candidate_pressure=78600
2026-09-06T19:13:41.002038Z  INFO modelled expanded operator plan finalist=0 modelled_cycles=594988 estimated_cycles=925196 estimated_exchange_cycles=443352
2026-09-06T19:13:41.805663Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: prepared large physical exchange phase phase=1 transfers=1426 maximum_identical_destinations=1
2026-09-06T19:13:41.805699Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: optimized physical exchange schedule phase=1 initial_horizon=1278 selected_horizon=1278 endpoint_lower_bound=1152 lower_bound_gap=126 selected_kind="full-duplex" neighborhood_improvements=0
2026-09-06T19:13:41.806830Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: finished large physical exchange phase phase=1 tile=661 row_words=10 horizon=1278
2026-09-06T19:13:41.839815Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: prepared large physical exchange phase phase=3 transfers=1426 maximum_identical_destinations=1
2026-09-06T19:13:41.839833Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: optimized physical exchange schedule phase=3 initial_horizon=1278 selected_horizon=1278 endpoint_lower_bound=1152 lower_bound_gap=126 selected_kind="full-duplex" neighborhood_improvements=0
2026-09-06T19:13:41.840951Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: finished large physical exchange phase phase=3 tile=661 row_words=10 horizon=1278
2026-09-06T19:13:41.873004Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: prepared large physical exchange phase phase=5 transfers=1426 maximum_identical_destinations=1
2026-09-06T19:13:41.873018Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: optimized physical exchange schedule phase=5 initial_horizon=1278 selected_horizon=1278 endpoint_lower_bound=1152 lower_bound_gap=126 selected_kind="full-duplex" neighborhood_improvements=0
2026-09-06T19:13:41.874118Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: finished large physical exchange phase phase=5 tile=661 row_words=10 horizon=1278
2026-09-06T19:13:42.381856Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: prepared large physical exchange phase phase=6 transfers=11648 maximum_identical_destinations=1
2026-09-06T19:13:42.381885Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: optimized physical exchange schedule phase=6 initial_horizon=1211 selected_horizon=1183 endpoint_lower_bound=576 lower_bound_gap=607 selected_kind="matching-waves" neighborhood_improvements=0
2026-09-06T19:13:42.390274Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: finished large physical exchange phase phase=6 tile=480 row_words=54 horizon=1183
2026-09-06T19:13:50.466817Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: prepared large physical exchange phase phase=7 transfers=58256 maximum_identical_destinations=1
2026-09-06T19:13:50.466870Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: optimized physical exchange schedule phase=7 initial_horizon=3269 selected_horizon=3269 endpoint_lower_bound=576 lower_bound_gap=2693 selected_kind="full-duplex" neighborhood_improvements=0
2026-09-06T19:13:50.518660Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: finished large physical exchange phase phase=7 tile=550 row_words=300 horizon=3269
2026-09-06T19:13:50.859033Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: prepared large physical exchange phase phase=8 transfers=3996 maximum_identical_destinations=1
2026-09-06T19:13:50.859066Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: optimized physical exchange schedule phase=8 initial_horizon=3660 selected_horizon=3625 endpoint_lower_bound=3072 lower_bound_gap=553 selected_kind="critical-neighborhood" neighborhood_improvements=1
2026-09-06T19:13:50.867337Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: finished large physical exchange phase phase=8 tile=73 row_words=69 horizon=3625
2026-09-06T19:13:53.053636Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: scheduled operator-plan finalist finalist=2 mapped=false analytical_cycles=424044 analytical_exchange_cycles=135344 scheduled_exchange_cycles=100241 refined_cycles=388941
2026-09-06T19:13:53.087838Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: compared ordinary and paired exchange schedules phase=0 candidates=184 ordinary_horizon=4730 paired_horizon=2436 use_paired=true
2026-09-06T19:13:53.116058Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: prepared large physical exchange phase phase=1 transfers=1426 maximum_identical_destinations=1
2026-09-06T19:13:53.116083Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: optimized physical exchange schedule phase=1 initial_horizon=1319 selected_horizon=1319 endpoint_lower_bound=1152 lower_bound_gap=167 selected_kind="full-duplex" neighborhood_improvements=0
2026-09-06T19:13:53.117259Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: finished large physical exchange phase phase=1 tile=728 row_words=10 horizon=1319
2026-09-06T19:13:53.141234Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: compared ordinary and paired exchange schedules phase=2 candidates=184 ordinary_horizon=4730 paired_horizon=2436 use_paired=true
2026-09-06T19:13:53.160759Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: prepared large physical exchange phase phase=3 transfers=1426 maximum_identical_destinations=1
2026-09-06T19:13:53.160769Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: optimized physical exchange schedule phase=3 initial_horizon=1319 selected_horizon=1319 endpoint_lower_bound=1152 lower_bound_gap=167 selected_kind="full-duplex" neighborhood_improvements=0
2026-09-06T19:13:53.161444Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: finished large physical exchange phase phase=3 tile=728 row_words=10 horizon=1319
2026-09-06T19:13:53.176879Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: compared ordinary and paired exchange schedules phase=4 candidates=184 ordinary_horizon=4730 paired_horizon=2436 use_paired=true
2026-09-06T19:13:53.194771Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: prepared large physical exchange phase phase=5 transfers=1426 maximum_identical_destinations=1
2026-09-06T19:13:53.194783Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: optimized physical exchange schedule phase=5 initial_horizon=1319 selected_horizon=1319 endpoint_lower_bound=1152 lower_bound_gap=167 selected_kind="full-duplex" neighborhood_improvements=0
2026-09-06T19:13:53.195504Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: finished large physical exchange phase phase=5 tile=728 row_words=10 horizon=1319
2026-09-06T19:13:53.470215Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: prepared large physical exchange phase phase=6 transfers=11648 maximum_identical_destinations=1
2026-09-06T19:13:53.470240Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: optimized physical exchange schedule phase=6 initial_horizon=1184 selected_horizon=1184 endpoint_lower_bound=576 lower_bound_gap=608 selected_kind="full-duplex" neighborhood_improvements=0
2026-09-06T19:13:53.475515Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: finished large physical exchange phase phase=6 tile=68 row_words=54 horizon=1184
2026-09-06T19:14:00.465085Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: prepared large physical exchange phase phase=7 transfers=58256 maximum_identical_destinations=1
2026-09-06T19:14:00.465127Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: optimized physical exchange schedule phase=7 initial_horizon=3035 selected_horizon=3035 endpoint_lower_bound=576 lower_bound_gap=2459 selected_kind="full-duplex" neighborhood_improvements=0
2026-09-06T19:14:00.516265Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: finished large physical exchange phase phase=7 tile=283 row_words=312 horizon=3035
2026-09-06T19:14:00.856618Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: prepared large physical exchange phase phase=8 transfers=3996 maximum_identical_destinations=1
2026-09-06T19:14:00.856642Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: optimized physical exchange schedule phase=8 initial_horizon=3821 selected_horizon=3819 endpoint_lower_bound=3072 lower_bound_gap=747 selected_kind="critical-neighborhood" neighborhood_improvements=1
2026-09-06T19:14:00.866878Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: finished large physical exchange phase phase=8 tile=512 row_words=79 horizon=3819
2026-09-06T19:14:03.247984Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: scheduled operator-plan finalist finalist=2 mapped=true analytical_cycles=424044 analytical_exchange_cycles=135344 scheduled_exchange_cycles=97241 refined_cycles=385941
2026-09-06T19:14:03.652679Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: selected physically scheduled operator-plan finalist selected=2 mapped=true
2026-09-06T19:14:03.652718Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: package build phase finished phase="select_finalist" elapsed_ms=61309 success=true
2026-09-06T19:14:03.652741Z  INFO lowered graph for package construction logical_shards=141248 exchange_phases=21
2026-09-06T19:14:03.654428Z  INFO ipu_codegen.package.phase{phase="compile_runtime"}: package build phase finished phase="compile_runtime" elapsed_ms=1 success=true
2026-09-06T19:14:03.666628Z  INFO ipu_codegen.package.phase{phase="plan_kernels"}: package build phase finished phase="plan_kernels" elapsed_ms=12 success=true
2026-09-06T19:14:03.667798Z  INFO ipu_codegen.package.phase{phase="compile_kernels"}: package build phase finished phase="compile_kernels" elapsed_ms=1 success=true
2026-09-06T19:14:03.669087Z  INFO ipu_codegen.package.phase{phase="link_runtime"}: package build phase finished phase="link_runtime" elapsed_ms=0 success=true
2026-09-06T19:14:05.106232Z  INFO ipu_codegen.package.phase{phase="size_tile_code"}: package build phase finished phase="size_tile_code" elapsed_ms=7 success=true
2026-09-06T19:14:05.106270Z  INFO allocated package support memory linked_end=322692 profile_bytes=0 exchange_table_bytes=4504 host_code_bytes=4444 generated_code_bytes=3412 code_address=393216 standard_ranges=[(409600, 524288)]
2026-09-06T19:14:05.701592Z  INFO ipu_codegen.package.phase{phase="place_storage"}: package build phase finished phase="place_storage" elapsed_ms=595 success=true
2026-09-06T19:14:05.713444Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=0
2026-09-06T19:14:05.727886Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=1
2026-09-06T19:14:05.728499Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=1 transfers=1426 maximum_identical_destinations=1
2026-09-06T19:14:05.728516Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=1 initial_horizon=1319 selected_horizon=1319 endpoint_lower_bound=1152 lower_bound_gap=167 selected_kind="reused" neighborhood_improvements=0
2026-09-06T19:14:05.729695Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=1 tile=728 row_words=10 horizon=1319
2026-09-06T19:14:05.748284Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=2
2026-09-06T19:14:05.761020Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=3
2026-09-06T19:14:05.761826Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=3 transfers=1426 maximum_identical_destinations=1
2026-09-06T19:14:05.761838Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=3 initial_horizon=1319 selected_horizon=1319 endpoint_lower_bound=1152 lower_bound_gap=167 selected_kind="reused" neighborhood_improvements=0
2026-09-06T19:14:05.763600Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=3 tile=728 row_words=10 horizon=1319
2026-09-06T19:14:05.774477Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=4
2026-09-06T19:14:05.785689Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=5
2026-09-06T19:14:05.786271Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=5 transfers=1426 maximum_identical_destinations=1
2026-09-06T19:14:05.786280Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=5 initial_horizon=1319 selected_horizon=1319 endpoint_lower_bound=1152 lower_bound_gap=167 selected_kind="reused" neighborhood_improvements=0
2026-09-06T19:14:05.787464Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=5 tile=728 row_words=10 horizon=1319
2026-09-06T19:14:06.022004Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=6
2026-09-06T19:14:06.026869Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=6 transfers=11648 maximum_identical_destinations=1
2026-09-06T19:14:06.026879Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=6 initial_horizon=1184 selected_horizon=1184 endpoint_lower_bound=576 lower_bound_gap=608 selected_kind="reused" neighborhood_improvements=0
2026-09-06T19:14:06.035471Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=6 tile=68 row_words=54 horizon=1184
2026-09-06T19:14:10.620493Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=7
2026-09-06T19:14:10.659067Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=7 transfers=58256 maximum_identical_destinations=1
2026-09-06T19:14:10.659087Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=7 initial_horizon=3035 selected_horizon=3035 endpoint_lower_bound=576 lower_bound_gap=2459 selected_kind="reused" neighborhood_improvements=0
2026-09-06T19:14:10.736076Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=7 tile=283 row_words=312 horizon=3035
2026-09-06T19:14:10.983720Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=8
2026-09-06T19:14:10.991862Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=8 transfers=3996 maximum_identical_destinations=1
2026-09-06T19:14:10.991893Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=8 initial_horizon=3819 selected_horizon=3819 endpoint_lower_bound=3072 lower_bound_gap=747 selected_kind="reused" neighborhood_improvements=0
2026-09-06T19:14:11.002069Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=8 tile=512 row_words=79 horizon=3819
2026-09-06T19:14:11.028490Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=9
2026-09-06T19:14:11.107891Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=10
2026-09-06T19:14:11.303120Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=11
2026-09-06T19:14:11.511506Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=12
2026-09-06T19:14:11.635244Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=13
2026-09-06T19:14:11.756103Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=14
2026-09-06T19:14:11.881240Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=15
2026-09-06T19:14:11.997214Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=16
2026-09-06T19:14:12.113221Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=17
2026-09-06T19:14:12.214594Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=18
2026-09-06T19:14:12.332330Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=19
2026-09-06T19:14:12.453020Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=20
2026-09-06T19:14:12.472782Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: package build phase finished phase="lower_exchanges" elapsed_ms=6771 success=true
2026-09-06T19:14:17.444002Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=0
2026-09-06T19:14:17.455023Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=1
2026-09-06T19:14:17.455653Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=1 transfers=1426 maximum_identical_destinations=1
2026-09-06T19:14:17.455664Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=1 initial_horizon=1319 selected_horizon=1319 endpoint_lower_bound=1152 lower_bound_gap=167 selected_kind="reused" neighborhood_improvements=0
2026-09-06T19:14:17.456790Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=1 tile=728 row_words=10 horizon=1319
2026-09-06T19:14:17.467676Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=2
2026-09-06T19:14:17.478886Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=3
2026-09-06T19:14:17.479490Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=3 transfers=1426 maximum_identical_destinations=1
2026-09-06T19:14:17.479510Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=3 initial_horizon=1319 selected_horizon=1319 endpoint_lower_bound=1152 lower_bound_gap=167 selected_kind="reused" neighborhood_improvements=0
2026-09-06T19:14:17.480668Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=3 tile=728 row_words=10 horizon=1319
2026-09-06T19:14:17.491948Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=4
2026-09-06T19:14:17.504904Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=5
2026-09-06T19:14:17.506049Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=5 transfers=1426 maximum_identical_destinations=1
2026-09-06T19:14:17.506074Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=5 initial_horizon=1319 selected_horizon=1319 endpoint_lower_bound=1152 lower_bound_gap=167 selected_kind="reused" neighborhood_improvements=0
2026-09-06T19:14:17.509816Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=5 tile=728 row_words=10 horizon=1319
2026-09-06T19:14:17.739295Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=6
2026-09-06T19:14:17.749519Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=6 transfers=11648 maximum_identical_destinations=1
2026-09-06T19:14:17.749533Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=6 initial_horizon=1184 selected_horizon=1184 endpoint_lower_bound=576 lower_bound_gap=608 selected_kind="reused" neighborhood_improvements=0
2026-09-06T19:14:17.757607Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=6 tile=68 row_words=54 horizon=1184
2026-09-06T19:14:21.871581Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=7
2026-09-06T19:14:21.899858Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=7 transfers=58256 maximum_identical_destinations=1
2026-09-06T19:14:21.899877Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=7 initial_horizon=3035 selected_horizon=3035 endpoint_lower_bound=576 lower_bound_gap=2459 selected_kind="reused" neighborhood_improvements=0
2026-09-06T19:14:21.949066Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=7 tile=283 row_words=312 horizon=3035
2026-09-06T19:14:22.083974Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=8
2026-09-06T19:14:22.092129Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=8 transfers=3996 maximum_identical_destinations=1
2026-09-06T19:14:22.092143Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=8 initial_horizon=3819 selected_horizon=3819 endpoint_lower_bound=3072 lower_bound_gap=747 selected_kind="reused" neighborhood_improvements=0
2026-09-06T19:14:22.102194Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=8 tile=512 row_words=79 horizon=3819
2026-09-06T19:14:22.127688Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=9
2026-09-06T19:14:22.236561Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=10
2026-09-06T19:14:22.368168Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=11
2026-09-06T19:14:22.488631Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=12
2026-09-06T19:14:22.608930Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=13
2026-09-06T19:14:22.735058Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=14
2026-09-06T19:14:22.852777Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=15
2026-09-06T19:14:22.976082Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=16
2026-09-06T19:14:23.091659Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=17
2026-09-06T19:14:23.221356Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=18
2026-09-06T19:14:23.344151Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=19
2026-09-06T19:14:23.472798Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=20
2026-09-06T19:14:23.527017Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: evaluated exchange placement finalist offset=24576 baseline_score=22667264000 score=7925334016 baseline_cycles=84641 candidate_cycles=84641 row_bytes=4504 row_capacity=16320 accepted=false
2026-09-06T19:14:23.558101Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: package build phase finished phase="optimize_exchange_placement" elapsed_ms=11085 success=true
2026-09-06T19:14:23.579919Z  INFO costed final placed program final_cycles=385941 final_exchange=97241
2026-09-06T19:14:24.288622Z  INFO ipu_codegen.package.phase{phase="prepare_tile_code"}: package build phase finished phase="prepare_tile_code" elapsed_ms=14 success=true
2026-09-06T19:14:24.308647Z  INFO ipu_codegen.package.phase{phase="emit_tile_code"}: package build phase finished phase="emit_tile_code" elapsed_ms=19 success=true
2026-09-06T19:14:24.431662Z  INFO ipu_codegen.package.phase{phase="build_tile_images"}: package build phase finished phase="build_tile_images" elapsed_ms=111 success=true
2026-09-06T19:14:24.556286Z  INFO writing application package tiles=1472
2026-09-06T19:14:24.576759Z  INFO application package written
2026-09-06T19:14:24.576781Z  INFO reading application package
2026-09-06T19:14:24.618292Z  INFO application package read tiles=1472 compiler=0.1.0
2026-09-06T19:14:24.618339Z  INFO waiting for hardware ownership path=artifacts/layout-sweep/device.lock
2026-09-06T19:14:27.123018Z  INFO acquired hardware ownership path=artifacts/layout-sweep/device.lock
2026-09-06T19:14:27.123072Z  INFO opening IPU device path="/dev/ipu0"
2026-09-06T19:14:27.123146Z  INFO IPU device attached path=/dev/ipu0
2026-09-06T19:14:27.123153Z  INFO initializing IPU device
2026-09-06T19:14:27.131617Z  INFO IPU device initialized
2026-09-06T19:14:27.131633Z  INFO replaying device configuration register_writes=2003
2026-09-06T19:14:27.147184Z  INFO loading application tile_count=1472 final_mark=23
2026-09-06T19:14:27.495673Z  INFO application loaded and initial synchronization completed tile_count=1472
2026-09-06T19:14:38.642748Z  INFO starting host exchange session startup_mark=23
2026-09-06T19:14:38.642789Z  INFO attaching host exchange pages pages=2
2026-09-06T19:14:38.643121Z  INFO host exchange session started
2026-09-06T19:14:38.643695Z  INFO invoking streaming host exchange call call="initialize" command=0 phases=126
2026-09-06T19:14:38.727477Z  INFO invoking streaming host exchange call call="run" command=0 phases=11
checkpoint=0 operation=0 tensors=1 samples=256 maximumAbsoluteError=0.001495
checkpoint=1 operation=1 tensors=1 samples=256 maximumAbsoluteError=0.001709
checkpoint=2 operation=2 tensors=1 samples=256 maximumAbsoluteError=0.001465
checkpoint=3 operation=6 tensors=1 samples=256 maximumAbsoluteError=0.000089
diagnosticCheckpoints=4 sampleLimit=256 numericalTest=PASS
package=artifacts/layout-sweep/attention-loopback-gaussian/model.ipuexe tiles=1472 hardwareTest=PASS