2026-09-06T19:11:17.821147Z  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 }
2026-09-06T19:11:17.903698Z  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))]
2026-09-06T19:11:17.913127Z  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))]
2026-09-06T19:11:17.930770Z  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=[]
2026-09-06T19:11:17.953936Z  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))]
2026-09-06T19:11:19.363444Z  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 }
2026-09-06T19:11:19.441475Z  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))]
2026-09-06T19:11:19.451231Z  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))]
2026-09-06T19:11:19.466614Z  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=[]
2026-09-06T19:11:19.487906Z  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))]
2026-09-06T19:11:19.561861Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="lower_mid"}: package build phase finished phase="lower_mid" elapsed_ms=3545 success=true
2026-09-06T19:11:34.466324Z  INFO screened tile mappings by exchange resource load candidates=65 baseline_cycles=93692 candidate_cycles=86780 baseline_pressure=78346 candidate_pressure=75877
2026-09-06T19:11:34.600661Z  INFO modelled expanded operator plan finalist=3 modelled_cycles=379224 estimated_cycles=415188 estimated_exchange_cycles=135344
2026-09-06T19:11:37.147645Z  INFO screened tile mappings by exchange resource load candidates=65 baseline_cycles=81248 candidate_cycles=74336 baseline_pressure=78346 candidate_pressure=71434
2026-09-06T19:11:37.303127Z  INFO modelled expanded operator plan finalist=2 modelled_cycles=375636 estimated_cycles=424044 estimated_exchange_cycles=135344
2026-09-06T19:11:55.173425Z  INFO screened tile mappings by exchange resource load candidates=139 baseline_cycles=119232 candidate_cycles=119232 baseline_pressure=80002 candidate_pressure=80002
2026-09-06T19:11:55.402159Z  INFO modelled expanded operator plan finalist=1 modelled_cycles=533101 estimated_cycles=778853 estimated_exchange_cycles=377584
2026-09-06T19:11:57.722563Z  INFO screened tile mappings by exchange resource load candidates=139 baseline_cycles=100544 candidate_cycles=100544 baseline_pressure=78600 candidate_pressure=78600
2026-09-06T19:11:57.987753Z  INFO modelled expanded operator plan finalist=0 modelled_cycles=594988 estimated_cycles=925196 estimated_exchange_cycles=443352
2026-09-06T19:11:58.766011Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="select_finalist"}: prepared large physical exchange phase phase=1 transfers=1426 maximum_identical_destinations=1
2026-09-06T19:11:58.766102Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}: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
2026-09-06T19:11:58.767315Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="select_finalist"}: finished large physical exchange phase phase=1 tile=661 row_words=10 horizon=1278
2026-09-06T19:11:58.802761Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="select_finalist"}: prepared large physical exchange phase phase=3 transfers=1426 maximum_identical_destinations=1
2026-09-06T19:11:58.802790Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}: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
2026-09-06T19:11:58.803956Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="select_finalist"}: finished large physical exchange phase phase=3 tile=661 row_words=10 horizon=1278
2026-09-06T19:11:58.839417Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="select_finalist"}: prepared large physical exchange phase phase=5 transfers=1426 maximum_identical_destinations=1
2026-09-06T19:11:58.839444Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}: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
2026-09-06T19:11:58.840586Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="select_finalist"}: finished large physical exchange phase phase=5 tile=661 row_words=10 horizon=1278
2026-09-06T19:11:59.341446Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="select_finalist"}: prepared large physical exchange phase phase=6 transfers=11648 maximum_identical_destinations=1
2026-09-06T19:11:59.341505Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}: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
2026-09-06T19:11:59.350452Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="select_finalist"}: finished large physical exchange phase phase=6 tile=480 row_words=54 horizon=1183
2026-09-06T19:12:08.448037Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="select_finalist"}: prepared large physical exchange phase phase=7 transfers=58256 maximum_identical_destinations=1
2026-09-06T19:12:08.448118Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}: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
2026-09-06T19:12:08.499910Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="select_finalist"}: finished large physical exchange phase phase=7 tile=550 row_words=300 horizon=3269
2026-09-06T19:12:08.886404Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="select_finalist"}: prepared large physical exchange phase phase=8 transfers=3996 maximum_identical_destinations=1
2026-09-06T19:12:08.886454Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}: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
2026-09-06T19:12:08.895464Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="select_finalist"}: finished large physical exchange phase phase=8 tile=73 row_words=69 horizon=3625
2026-09-06T19:12:11.251288Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}: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
2026-09-06T19:12:11.291460Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}: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
2026-09-06T19:12:11.325199Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="select_finalist"}: prepared large physical exchange phase phase=1 transfers=1426 maximum_identical_destinations=1
2026-09-06T19:12:11.325271Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}: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
2026-09-06T19:12:11.326569Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="select_finalist"}: finished large physical exchange phase phase=1 tile=728 row_words=10 horizon=1319
2026-09-06T19:12:11.361002Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}: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
2026-09-06T19:12:11.392602Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="select_finalist"}: prepared large physical exchange phase phase=3 transfers=1426 maximum_identical_destinations=1
2026-09-06T19:12:11.392646Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}: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
2026-09-06T19:12:11.393929Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="select_finalist"}: finished large physical exchange phase phase=3 tile=728 row_words=10 horizon=1319
2026-09-06T19:12:11.420193Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}: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
2026-09-06T19:12:11.458942Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="select_finalist"}: prepared large physical exchange phase phase=5 transfers=1426 maximum_identical_destinations=1
2026-09-06T19:12:11.458983Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}: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
2026-09-06T19:12:11.460634Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="select_finalist"}: finished large physical exchange phase phase=5 tile=728 row_words=10 horizon=1319
2026-09-06T19:12:11.995344Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="select_finalist"}: prepared large physical exchange phase phase=6 transfers=11648 maximum_identical_destinations=1
2026-09-06T19:12:11.995398Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}: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
2026-09-06T19:12:12.004493Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="select_finalist"}: finished large physical exchange phase phase=6 tile=68 row_words=54 horizon=1184
2026-09-06T19:12:21.484584Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="select_finalist"}: prepared large physical exchange phase phase=7 transfers=58256 maximum_identical_destinations=1
2026-09-06T19:12:21.484659Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}: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
2026-09-06T19:12:21.543578Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="select_finalist"}: finished large physical exchange phase phase=7 tile=283 row_words=312 horizon=3035
2026-09-06T19:12:22.010609Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="select_finalist"}: prepared large physical exchange phase phase=8 transfers=3996 maximum_identical_destinations=1
2026-09-06T19:12:22.010662Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}: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
2026-09-06T19:12:22.022039Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="select_finalist"}: finished large physical exchange phase phase=8 tile=512 row_words=79 horizon=3819
2026-09-06T19:12:24.783952Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}: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
2026-09-06T19:12:25.239421Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="select_finalist"}: selected physically scheduled operator-plan finalist selected=2 mapped=true
2026-09-06T19:12:25.239471Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="select_finalist"}: package build phase finished phase="select_finalist" elapsed_ms=65677 success=true
2026-09-06T19:12:25.239497Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}: lowered graph for package construction logical_shards=141248 exchange_phases=21
2026-09-06T19:12:25.241990Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="compile_runtime"}: package build phase finished phase="compile_runtime" elapsed_ms=2 success=true
2026-09-06T19:12:25.258635Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="plan_kernels"}: package build phase finished phase="plan_kernels" elapsed_ms=16 success=true
2026-09-06T19:12:25.259960Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="compile_kernels"}: package build phase finished phase="compile_kernels" elapsed_ms=1 success=true
2026-09-06T19:12:25.261622Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="link_runtime"}: package build phase finished phase="link_runtime" elapsed_ms=0 success=true
2026-09-06T19:12:26.885592Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="size_tile_code"}: package build phase finished phase="size_tile_code" elapsed_ms=18 success=true
2026-09-06T19:12:26.885650Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}: allocated package support memory linked_end=322748 profile_bytes=360 exchange_table_bytes=4504 host_code_bytes=4648 generated_code_bytes=4180 code_address=409600 standard_ranges=[(425984, 524288)]
2026-09-06T19:12:27.492172Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="place_storage"}: package build phase finished phase="place_storage" elapsed_ms=606 success=true
2026-09-06T19:12:27.504768Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=0
2026-09-06T19:12:27.518173Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=1
2026-09-06T19:12:27.519043Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=1 transfers=1426 maximum_identical_destinations=1
2026-09-06T19:12:27.519058Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}: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
2026-09-06T19:12:27.521270Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=1 tile=728 row_words=10 horizon=1319
2026-09-06T19:12:27.542353Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=2
2026-09-06T19:12:27.556513Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=3
2026-09-06T19:12:27.557296Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=3 transfers=1426 maximum_identical_destinations=1
2026-09-06T19:12:27.557311Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}: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
2026-09-06T19:12:27.558581Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=3 tile=728 row_words=10 horizon=1319
2026-09-06T19:12:27.570825Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=4
2026-09-06T19:12:27.584506Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=5
2026-09-06T19:12:27.585298Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=5 transfers=1426 maximum_identical_destinations=1
2026-09-06T19:12:27.585314Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}: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
2026-09-06T19:12:27.586607Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=5 tile=728 row_words=10 horizon=1319
2026-09-06T19:12:27.837037Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=6
2026-09-06T19:12:27.843612Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=6 transfers=11648 maximum_identical_destinations=1
2026-09-06T19:12:27.843630Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}: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
2026-09-06T19:12:27.852673Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=6 tile=68 row_words=54 horizon=1184
2026-09-06T19:12:32.108033Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=7
2026-09-06T19:12:32.137930Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=7 transfers=58256 maximum_identical_destinations=1
2026-09-06T19:12:32.137960Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}: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
2026-09-06T19:12:32.187429Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=7 tile=283 row_words=312 horizon=3035
2026-09-06T19:12:32.325469Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=8
2026-09-06T19:12:32.334670Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=8 transfers=3996 maximum_identical_destinations=1
2026-09-06T19:12:32.334689Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}: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
2026-09-06T19:12:32.345166Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=8 tile=512 row_words=79 horizon=3819
2026-09-06T19:12:32.372555Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=9
2026-09-06T19:12:32.489919Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=10
2026-09-06T19:12:32.625274Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=11
2026-09-06T19:12:32.759588Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=12
2026-09-06T19:12:32.900295Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=13
2026-09-06T19:12:33.034013Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=14
2026-09-06T19:12:33.166518Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=15
2026-09-06T19:12:33.263855Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=16
2026-09-06T19:12:33.389266Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=17
2026-09-06T19:12:33.524938Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=18
2026-09-06T19:12:33.658294Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=19
2026-09-06T19:12:33.796663Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=20
2026-09-06T19:12:33.818723Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="lower_exchanges"}: package build phase finished phase="lower_exchanges" elapsed_ms=6326 success=true
2026-09-06T19:12:39.102499Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=0
2026-09-06T19:12:39.116574Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=1
2026-09-06T19:12:39.117476Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=1 transfers=1426 maximum_identical_destinations=1
2026-09-06T19:12:39.117492Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}: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
2026-09-06T19:12:39.118866Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=1 tile=728 row_words=10 horizon=1319
2026-09-06T19:12:39.138351Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=2
2026-09-06T19:12:39.151788Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=3
2026-09-06T19:12:39.152642Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=3 transfers=1426 maximum_identical_destinations=1
2026-09-06T19:12:39.152660Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}: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
2026-09-06T19:12:39.153938Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=3 tile=728 row_words=10 horizon=1319
2026-09-06T19:12:39.166065Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=4
2026-09-06T19:12:39.179080Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=5
2026-09-06T19:12:39.179847Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=5 transfers=1426 maximum_identical_destinations=1
2026-09-06T19:12:39.179863Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}: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
2026-09-06T19:12:39.181122Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=5 tile=728 row_words=10 horizon=1319
2026-09-06T19:12:39.427410Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=6
2026-09-06T19:12:39.433779Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=6 transfers=11648 maximum_identical_destinations=1
2026-09-06T19:12:39.433798Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}: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
2026-09-06T19:12:39.442156Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=6 tile=68 row_words=54 horizon=1184
2026-09-06T19:12:43.748543Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=7
2026-09-06T19:12:43.781838Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=7 transfers=58256 maximum_identical_destinations=1
2026-09-06T19:12:43.781867Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}: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
2026-09-06T19:12:43.831804Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=7 tile=283 row_words=312 horizon=3035
2026-09-06T19:12:43.977796Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=8
2026-09-06T19:12:43.986870Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=8 transfers=3996 maximum_identical_destinations=1
2026-09-06T19:12:43.986891Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}: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
2026-09-06T19:12:43.997351Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=8 tile=512 row_words=79 horizon=3819
2026-09-06T19:12:44.025616Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=9
2026-09-06T19:12:44.140069Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=10
2026-09-06T19:12:44.273492Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=11
2026-09-06T19:12:44.408990Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=12
2026-09-06T19:12:44.541951Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=13
2026-09-06T19:12:44.672918Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=14
2026-09-06T19:12:44.804430Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=15
2026-09-06T19:12:44.930255Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=16
2026-09-06T19:12:45.056399Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=17
2026-09-06T19:12:45.185752Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=18
2026-09-06T19:12:45.316517Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=19
2026-09-06T19:12:45.456278Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=20
2026-09-06T19:12:45.511630Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}: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
2026-09-06T19:12:45.550596Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: package build phase finished phase="optimize_exchange_placement" elapsed_ms=11731 success=true
2026-09-06T19:12:45.573939Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}: costed final placed program final_cycles=385941 final_exchange=97241
2026-09-06T19:12:46.532051Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="prepare_tile_code"}: package build phase finished phase="prepare_tile_code" elapsed_ms=113 success=true
2026-09-06T19:12:46.571683Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="emit_tile_code"}: package build phase finished phase="emit_tile_code" elapsed_ms=39 success=true
2026-09-06T19:12:46.795761Z  INFO ipu_codegen.package.build{tile_count=1472 operations=7}:ipu_codegen.package.phase{phase="build_tile_images"}: package build phase finished phase="build_tile_images" elapsed_ms=201 success=true
2026-09-06T19:12:47.045171Z  INFO writing application package tiles=1472
2026-09-06T19:12:47.185239Z  INFO application package written
2026-09-06T19:12:47.185456Z  INFO reading application package
2026-09-06T19:12:47.521064Z  INFO application package read tiles=1472 compiler=0.1.0
2026-09-06T19:12:47.521908Z  INFO waiting for hardware ownership path=artifacts/layout-sweep/device.lock
2026-09-06T19:12:47.521931Z  INFO acquired hardware ownership path=artifacts/layout-sweep/device.lock
2026-09-06T19:12:47.521937Z  INFO opening IPU device path="/dev/ipu0"
2026-09-06T19:12:47.521996Z  INFO IPU device attached path=/dev/ipu0
2026-09-06T19:12:47.521999Z  INFO initializing IPU device
2026-09-06T19:12:47.530460Z  INFO IPU device initialized
2026-09-06T19:12:47.530498Z  INFO replaying device configuration register_writes=2003
2026-09-06T19:12:47.548284Z  INFO loading application tile_count=1472 final_mark=23
2026-09-06T19:12:47.826356Z  INFO application loaded and initial synchronization completed tile_count=1472
2026-09-06T19:12:56.745570Z  INFO starting host exchange session startup_mark=23
2026-09-06T19:12:56.745677Z  INFO attaching host exchange pages pages=2
2026-09-06T19:12:56.746331Z  INFO host exchange session started
2026-09-06T19:12:56.748525Z  INFO invoking streaming host exchange call call="initialize" command=0 phases=126
2026-09-06T19:12:56.862799Z  INFO invoking streaming host exchange call call="run" command=0 phases=17
profile=artifacts/layout-sweep/attention-loopback/execution.ipuprofile tiles=1472 samples=116372
attentionNumericalChecks=839808 expected=0.999756 maxError=0.001230 numericalTest=PASS
package=artifacts/layout-sweep/attention-loopback/model.ipuexe tiles=1472 hardwareTest=PASS