2026-09-06T16:50:15.524721Z  INFO retained operator-plan finalist finalist=0 values=11 operations=7 estimated_cycles=609851 estimated_exchange_cycles=188600 exchange_row_bytes=41780 peak_standard_bytes=131892 peak_interleaved_bytes=155648 peak_total_bytes=238388 maximum_standard_allocation_bytes=32768 active_tile_counts={12, 64} padding_group_counts={} conversion_sources=[]
2026-09-06T16:50:15.535441Z  INFO ipu_codegen.package.phase{phase="lower_mid"}: package build phase finished phase="lower_mid" elapsed_ms=477 success=true
2026-09-06T16:50:15.977879Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: screened tile mappings by exchange resource load candidates=5 baseline_cycles=73536 candidate_cycles=73536 baseline_pressure=66310 candidate_pressure=66310
2026-09-06T16:50:15.980661Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: modelled expanded operator plan finalist=0 modelled_cycles=445899 estimated_cycles=677323 estimated_exchange_cycles=307960
2026-09-06T16:50:16.392358Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: prepared large physical exchange phase phase=1 transfers=1148 maximum_identical_destinations=1
2026-09-06T16:50:16.392399Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: optimized physical exchange schedule phase=1 initial_horizon=6419 selected_horizon=6419 endpoint_lower_bound=5832 lower_bound_gap=587 selected_kind="full-duplex" neighborhood_improvements=0
2026-09-06T16:50:16.393196Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: finished large physical exchange phase phase=1 tile=4 row_words=1503 horizon=6419
2026-09-06T16:50:16.736232Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: scheduled operator-plan finalist finalist=0 mapped=false analytical_cycles=677323 analytical_exchange_cycles=307960 scheduled_exchange_cycles=77613 refined_cycles=446976
2026-09-06T16:50:16.736701Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: selected physically scheduled operator-plan finalist selected=0 mapped=false
2026-09-06T16:50:16.736712Z  INFO ipu_codegen.package.phase{phase="select_finalist"}: package build phase finished phase="select_finalist" elapsed_ms=1201 success=true
2026-09-06T16:50:16.736725Z  INFO lowered graph for package construction logical_shards=911 exchange_phases=5
2026-09-06T16:50:16.736956Z  INFO ipu_codegen.package.phase{phase="compile_runtime"}: package build phase finished phase="compile_runtime" elapsed_ms=0 success=true
2026-09-06T16:50:16.737105Z  INFO ipu_codegen.package.phase{phase="plan_kernels"}: package build phase finished phase="plan_kernels" elapsed_ms=0 success=true
2026-09-06T16:50:16.737656Z  INFO ipu_codegen.package.phase{phase="compile_kernels"}: compiling kernel source=/srv/home/gc-sdk/ipu-stack/crates/ipu-tests/../../device/attention_softmax_f16.S name="attention_softmax_d72_p768_tail" target=ipu21
2026-09-06T16:50:16.798118Z  INFO ipu_codegen.package.phase{phase="compile_kernels"}: kernel artifact created object=/srv/home/.cache/ipu-stack/kernels/a283f3f4b3b1966a24d15f0ef9ebc2c38b40ca8f12379c6a72f9c0530e54fd3b/kernel.o metadata=/srv/home/.cache/ipu-stack/kernels/a283f3f4b3b1966a24d15f0ef9ebc2c38b40ca8f12379c6a72f9c0530e54fd3b/kernel.json
2026-09-06T16:50:16.798439Z  INFO ipu_codegen.package.phase{phase="compile_kernels"}: package build phase finished phase="compile_kernels" elapsed_ms=61 success=true
2026-09-06T16:50:16.798837Z  INFO ipu_codegen.package.phase{phase="link_runtime"}: package build phase finished phase="link_runtime" elapsed_ms=0 success=true
2026-09-06T16:50:16.823536Z  INFO ipu_codegen.package.phase{phase="size_tile_code"}: package build phase finished phase="size_tile_code" elapsed_ms=3 success=true
2026-09-06T16:50:16.823584Z  INFO allocated package support memory linked_end=320796 profile_bytes=0 exchange_table_bytes=14124 host_code_bytes=1076 generated_code_bytes=1764 code_address=321880 standard_ranges=[(393216, 524288)]
2026-09-06T16:50:16.826653Z  INFO ipu_codegen.package.phase{phase="place_storage"}: package build phase finished phase="place_storage" elapsed_ms=3 success=true
2026-09-06T16:50:16.833819Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=0
2026-09-06T16:50:16.916243Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=1
2026-09-06T16:50:16.916707Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=1 transfers=1148 maximum_identical_destinations=1
2026-09-06T16:50:16.916716Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=1 initial_horizon=6419 selected_horizon=6419 endpoint_lower_bound=5832 lower_bound_gap=587 selected_kind="reused" neighborhood_improvements=0
2026-09-06T16:50:16.917256Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=1 tile=4 row_words=1503 horizon=6419
2026-09-06T16:50:16.924704Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=2
2026-09-06T16:50:17.000549Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=3
2026-09-06T16:50:17.016041Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=4
2026-09-06T16:50:17.016422Z  INFO ipu_codegen.package.phase{phase="lower_exchanges"}: package build phase finished phase="lower_exchanges" elapsed_ms=189 success=true
2026-09-06T16:50:17.046407Z  INFO ipu_codegen.package.phase{phase="optimize_exchange_placement"}: package build phase finished phase="optimize_exchange_placement" elapsed_ms=29 success=true
2026-09-06T16:50:17.046562Z  INFO costed final placed program final_cycles=446976 final_exchange=77613
2026-09-06T16:50:17.059592Z  INFO ipu_codegen.package.phase{phase="prepare_tile_code"}: package build phase finished phase="prepare_tile_code" elapsed_ms=6 success=true
2026-09-06T16:50:17.067052Z  INFO ipu_codegen.package.phase{phase="emit_tile_code"}: package build phase finished phase="emit_tile_code" elapsed_ms=7 success=true
2026-09-06T16:50:17.195559Z  INFO ipu_codegen.package.phase{phase="build_tile_images"}: package build phase finished phase="build_tile_images" elapsed_ms=127 success=true
2026-09-06T16:50:17.201636Z  INFO writing application package tiles=1472
2026-09-06T16:50:17.215121Z  INFO application package written
2026-09-06T16:50:17.215982Z  INFO reading application package
2026-09-06T16:50:17.233658Z  INFO application package read tiles=1472 compiler=0.1.0
2026-09-06T16:50:17.233917Z  INFO waiting for hardware ownership path=artifacts/layout-sweep/device.lock
2026-09-06T16:50:17.233927Z  INFO acquired hardware ownership path=artifacts/layout-sweep/device.lock
2026-09-06T16:50:17.233932Z  INFO opening IPU device path="/dev/ipu0"
2026-09-06T16:50:17.233969Z  INFO IPU device attached path=/dev/ipu0
2026-09-06T16:50:17.233972Z  INFO initializing IPU device
2026-09-06T16:50:17.242077Z  INFO IPU device initialized
2026-09-06T16:50:17.242133Z  INFO replaying device configuration register_writes=2003
2026-09-06T16:50:17.246868Z  INFO loading application tile_count=1472 final_mark=23
2026-09-06T16:50:17.455564Z  INFO application loaded and initial synchronization completed tile_count=1472
2026-09-06T16:50:17.673453Z  INFO starting host exchange session startup_mark=23
2026-09-06T16:50:17.673498Z  INFO attaching host exchange pages pages=2
2026-09-06T16:50:17.674262Z  INFO host exchange session started
2026-09-06T16:50:17.674284Z  INFO invoking streaming host exchange call call="initialize" command=0 phases=24
2026-09-06T16:50:17.681354Z  INFO invoking streaming host exchange call call="run" command=0 phases=5
checkpoint=0 operation=0 tensors=1 samples=256 maximumAbsoluteError=0.000244
checkpoint=1 operation=1 tensors=1 samples=256 maximumAbsoluteError=0.000244
checkpoint=2 operation=2 tensors=1 samples=256 maximumAbsoluteError=0.000244
checkpoint=3 operation=6 tensors=1 samples=256 maximumAbsoluteError=0.000019
diagnosticCheckpoints=4 sampleLimit=256 numericalTest=PASS
package=artifacts/layout-sweep/attention-tail-fixed-materialized/model.ipuexe tiles=1472 hardwareTest=PASS