XPK Start: Tue Apr 21 01:58:49 UTC 2026
2026-04-21 01:58:53.887627: E external/local_xla/xla/stream_executor/cuda/cuda_fft.cc:467] Unable to register cuFFT factory: Attempting to register factory for plugin cuFFT when one has already been registered
WARNING: All log messages before absl::InitializeLog() is called are written to STDERR
E0000 00:00:1776736733.900413 10 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered
E0000 00:00:1776736733.904079 10 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered
W0000 00:00:1776736733.915354 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776736733.915375 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776736733.915378 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776736733.915379 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
2026-04-21 01:59:13.017518: E external/local_xla/xla/stream_executor/cuda/cuda_platform.cc:51] failed call to cuInit: INTERNAL: CUDA error: Failed call to cuInit: UNKNOWN ERROR (303)
I0421 01:59:13.535750 136415047964480 max_utils.py:273] Attempting to initialize the jax distributed system...
INFO:2026-04-21 01:59:22,575:jax._src.distributed:140: Starting JAX distributed service on [::]:8482
I0421 01:59:22.575042 136415047964480 distributed.py:140] Starting JAX distributed service on [::]:8482
INFO:2026-04-21 01:59:22,577:jax._src.distributed:157: Connecting to JAX distributed service on mt-15-ocdbt-true-rs-olo4d-slice-job-0-0.mt-15-ocdbt-true-rs-olo4d:8482
I0421 01:59:22.577385 136415047964480 distributed.py:157] Connecting to JAX distributed service on mt-15-ocdbt-true-rs-olo4d-slice-job-0-0.mt-15-ocdbt-true-rs-olo4d:8482
I0421 01:59:23.676991 136415047964480 max_utils.py:284] Jax distributed system initialized!
I0421 01:59:30.500114 136415047964480 max_utils.py:800] System Information: Jax Version: 0.8.1
I0421 01:59:30.500218 136415047964480 max_utils.py:801] System Information: Jaxlib Version: 0.8.1
I0421 01:59:30.500258 136415047964480 max_utils.py:802] System Information: Jax Backend: PJRT C API
TFRT TPU v6 lite
Built on Nov 12 2025 14:16:36 (1762985796) cl/831091709
I0421 01:59:30.500293 136415047964480 train_utils.py:347] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0421 01:59:31.117085 136415047964480 maxtext_utils.py:1398] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0421 01:59:31.117364 136415047964480 checkpointing.py:677] Setting up checkpoint logger...
I0421 01:59:31.117433 136415047964480 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True
I0421 01:59:31.117479 136415047964480 pytree_checkpoint_handler.py:589] save_device_host_concurrent_bytes=None
I0421 01:59:31.117815 136415047964480 base_pytree_checkpoint_handler.py:415] Created BasePyTreeCheckpointHandler: use_ocdbt=True, use_zarr3=True, pytree_metadata_options=PyTreeMetadataOptions(support_rich_types=False), array_metadata_store=<orbax.checkpoint._src.metadata.array_metadata_store.Store object at 0x7c1127979100>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0421 01:59:32.785326 136415047964480 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0421 01:59:32.785706 136415047964480 checkpoint_manager.py:709] [process=1][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7bfe64d341d0>}, handler_registry=None
I0421 01:59:32.785951 136415047964480 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7bfe64d341d0>` for item "items" and save args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>` to `_handler_registry`.
I0421 01:59:32.786005 136415047964480 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7bfe64d37c80>` for item "metrics" and save args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>` to `_handler_registry`.
I0421 01:59:32.786042 136415047964480 composite_checkpoint_handler.py:505] Initialized registry DefaultCheckpointHandlerRegistry({('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeSaveArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7bfe64d341d0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7bfe64d341d0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7bfe64d37c80>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7bfe64d37c80>}).
I0421 01:59:32.788667 136415047964480 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.33
I0421 01:59:32.788752 136415047964480 async_checkpointer.py:177] [process=1][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7c11135fb2e0> timeout: 600 secs and primary_host=0 for async checkpoint writes
I0421 01:59:35.169545 136294915094272 checkpoint.py:228] Read Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776736554305353126, 'commit_timestamp_nsecs': 1776736603314739446, 'custom_metadata': {}} from gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_true/checkpoints/5/_CHECKPOINT_METADATA
I0421 01:59:35.407330 136294915094272 checkpoint_manager.py:1877] Missing metrics for step 5
I0421 01:59:36.230365 136415047964480 checkpoint_manager.py:1818] Found 3 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_true/checkpoints
I0421 01:59:37.943028 136415047964480 checkpoint_manager.py:929] [process=1][thread=MainThread] CheckpointManager created, primary_host=0, CheckpointManagerOptions=CheckpointManagerOptions(save_interval_steps=1, max_to_keep=None, keep_time_interval=None, keep_period=None, should_keep_fn=None, best_fn=None, best_mode='max', keep_checkpoints_without_metrics=True, step_prefix=None, step_format_fixed_length=None, step_name_format=None, create=True, cleanup_tmp_directories=False, save_on_steps=frozenset(), single_host_load_and_broadcast=False, todelete_subdir=None, todelete_full_path=None, enable_background_delete=False, read_only=False, enable_async_checkpointing=True, async_options=None, multiprocessing_options=MultiprocessingOptions(primary_host=0, active_processes=None, barrier_sync_key_prefix=None), should_save_fn=None, file_options=FileOptions(path_permission_mode=None), save_root_metadata=True, temporary_path_class=None, save_decision_policy=FixedIntervalPolicy(interval=5), preservation_policy=LatestN(n=None), prevent_write_metrics=False, enable_should_save_is_saving_in_progress_check=True, enable_per_process_directory_creation=False, lightweight_initialize=False), root_directory=gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_true/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7bfe64d30680>
I0421 01:59:37.943216 136415047964480 checkpointing.py:301] Checkpoint manager created!
I0421 01:59:38.821515 136415047964480 nnx_wrappers.py:453] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0421 01:59:38.821617 136415047964480 nnx_wrappers.py:453] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0421 01:59:39.194870 136415047964480 attentions.py:1084] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0421 01:59:39.194964 136415047964480 attentions.py:1084] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0421 01:59:39.211518 136415047964480 attentions.py:1085] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0421 01:59:39.211578 136415047964480 attentions.py:1085] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0421 01:59:39.235459 136415047964480 attentions.py:1150] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0421 01:59:39.235526 136415047964480 attentions.py:1150] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 01:59:39.251863 136415047964480 attentions.py:1151] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0421 01:59:39.251928 136415047964480 attentions.py:1151] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 01:59:39.268262 136415047964480 attentions.py:1152] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0421 01:59:39.268323 136415047964480 attentions.py:1152] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 01:59:39.293034 136415047964480 attentions.py:1193] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0421 01:59:39.293106 136415047964480 attentions.py:1193] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 01:59:39.312988 136415047964480 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0421 01:59:39.313055 136415047964480 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0421 01:59:39.505183 136415047964480 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0421 01:59:39.505289 136415047964480 checkpointing.py:581] restoring from this run's directory step 9
I0421 01:59:41.081570 136415047964480 checkpointer.py:304] Restoring checkpoint from gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_true/checkpoints/9.
I0421 01:59:42.999445 1416 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0421 01:59:49.307948 136415047964480 jax_array_handlers.py:837] [process=1] /jax/orbax/read/worker/io/requested throughput: 250.291 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 6.313756942749023 s) (per-host)
I0421 01:59:49.312874 136415047964480 base_pytree_checkpoint_handler.py:129] [process=1] /jax/checkpoint/read/gbytes_per_sec: 235.896 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 6.70885443687439 s) (per-host)
I0421 01:59:50.634961 136415047964480 checkpointer.py:318] Finished restoring checkpoint in 10.89 seconds from gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_true/checkpoints/9.
I0421 01:59:50.635120 136415047964480 standard_logger.py:34] {'step': 9, 'event_type': 'restore', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_true/checkpoints', 'checkpointer_start_time': 1776736779.7418056, 'checkpointer_duration_secs': 10.893283128738403, 'checkpoint_manager_start_time': 1776736779.5055494, 'checkpoint_manager_duration_secs': 11.129541158676147}
fsdp: 32
I0421 01:59:51.039909 136415047964480 maxtext_utils.py:1501] params/params/decoder/decoder_norm/scale
Shape: float32[2048]
Logical: PartitionSpec('norm',)
Physical: (None,)
I0421 01:59:51.040040 136415047964480 maxtext_utils.py:1501] params/params/decoder/layers/mlp/wi_0/kernel
Shape: float32[2048,16,7168]
Logical: PartitionSpec('embed', 'layers', 'mlp')
Physical: ('fsdp', None, None)
I0421 01:59:51.040094 136415047964480 maxtext_utils.py:1501] params/params/decoder/layers/mlp/wi_1/kernel
Shape: float32[2048,16,7168]
Logical: PartitionSpec('embed', 'layers', 'mlp')
Physical: ('fsdp', None, None)
I0421 01:59:51.040154 136415047964480 maxtext_utils.py:1501] params/params/decoder/layers/mlp/wo/kernel
Shape: float32[7168,16,2048]
Logical: PartitionSpec('mlp', 'layers', 'embed')
Physical: (None, None, 'fsdp')
I0421 01:59:51.040215 136415047964480 maxtext_utils.py:1501] params/params/decoder/layers/post_self_attention_layer_norm/scale
Shape: float32[2048,16]
Logical: PartitionSpec('norm', 'layers')
Physical: (None, None)
I0421 01:59:51.040256 136415047964480 maxtext_utils.py:1501] params/params/decoder/layers/pre_self_attention_layer_norm/scale
Shape: float32[2048,16]
Logical: PartitionSpec('norm', 'layers')
Physical: (None, None)
I0421 01:59:51.040310 136415047964480 maxtext_utils.py:1501] params/params/decoder/layers/self_attention/key/kernel
Shape: float32[2048,16,16,128]
Logical: PartitionSpec('embed', 'layers', 'kv_heads', 'kv_head_dim')
Physical: ('fsdp', None, None, None)
I0421 01:59:51.040363 136415047964480 maxtext_utils.py:1501] params/params/decoder/layers/self_attention/out/kernel
Shape: float32[16,16,128,2048]
Logical: PartitionSpec('heads', 'layers', 'kv', 'embed')
Physical: (None, None, None, 'fsdp')
I0421 01:59:51.040418 136415047964480 maxtext_utils.py:1501] params/params/decoder/layers/self_attention/query/kernel
Shape: float32[2048,16,16,128]
Logical: PartitionSpec('embed', 'layers', 'q_heads', 'kv')
Physical: ('fsdp', None, None, None)
I0421 01:59:51.040460 136415047964480 maxtext_utils.py:1501] params/params/decoder/layers/self_attention/value/kernel
Shape: float32[2048,16,16,128]
Logical: PartitionSpec('embed', 'layers', 'kv_heads', 'kv_head_dim')
Physical: ('fsdp', None, None, None)
I0421 01:59:51.040510 136415047964480 maxtext_utils.py:1501] params/params/decoder/logits_dense/kernel
Shape: float32[2048,32000]
Logical: PartitionSpec('embed', 'vocab')
Physical: ('fsdp', None)
I0421 01:59:51.040559 136415047964480 maxtext_utils.py:1501] params/params/token_embedder/embedding
Shape: float32[32000,2048]
Logical: PartitionSpec('vocab', 'embed')
Physical: (None, 'fsdp')
I0421 01:59:51.539448 136415047964480 train.py:156] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0421 01:59:51.539543 136415047964480 train.py:156] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0421 01:59:51.554541 136415047964480 train.py:163] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0421 01:59:51.554601 136415047964480 train.py:163] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0421 02:00:02.291095 136415047964480 max_utils.py:791] Total memory size: 1.5 GB, Output size: 0.4 GB, Temp size: 1.1 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB.
I0421 02:00:02.291983 136415047964480 metric_logger.py:289] number parameters: 1.104 billion
I0421 02:00:13.185941 136415047964480 checkpointing.py:772] Waiting for step 10 to finish before checkpoint...
I0421 02:00:13.632779 136415047964480 checkpointing.py:776] Waited 0.44681715965270996 seconds for step 10 to finish before starting checkpointing.
I0421 02:00:13.635287 136415047964480 checkpoint_manager.py:2013] [process=1][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0421 02:00:13.637154 136415047964480 checkpoint_manager.py:1518] [process=1] Saving checkpoint at step 10
I0421 02:00:13.639799 136415047964480 async_checkpointer.py:452] [process=1] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_true/checkpoints/10.
I0421 02:00:14.661252 136415047964480 signaling_client.py:364] Using JaxDistributedSignalingClient
I0421 02:00:14.662227 136415047964480 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array.
I0421 02:00:14.662284 136415047964480 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False
I0421 02:00:14.915899 136415047964480 base_pytree_checkpoint_handler.py:153] [process=1][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.254738s
I0421 02:00:14.916068 136415047964480 base_pytree_checkpoint_handler.py:129] [process=1] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.974 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.5186583995819092 s) (per-host)
I0421 02:00:14.916120 136415047964480 base_pytree_checkpoint_handler.py:737] [process=1][thread=MainThread] Initiated Pytree async_save. Time taken: 0.518720s (batch_requests_ready=0.261935s, total_serialization_initiated=0.256715s, others=0.000069s)
I0421 02:00:14.916212 136415047964480 composite_checkpoint_handler.py:715] [process=1][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.522896s (all_items=0.000020s, per_item={'items': '0.00001955'}, temp_paths=0.522877)
I0421 02:00:14.917129 136294327899904 async_checkpointer.py:79] [process=1][thread=async_save] Background save thread started.
I0421 02:00:14.917298 136415047964480 async_checkpointer.py:561] Finished blocking save. Time taken: 1.280071s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_true/checkpoints/10.
I0421 02:00:15.348317 136415047964480 checkpoint_manager.py:1566] [process=1][thread=MainThread][step=10] Starting CheckpointManager Save Finalize thread=save_finalize
I0421 02:00:15.348702 136289998546688 async_checkpointer.py:265] [process=1][thread=save_finalize] Waiting for background save thread=async_save.
I0421 02:00:15.348864 136415047964480 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776736813.6352692, 'wait_for_prev_duration_secs': 6.270408630371094e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776736813.6371925, 'checkpointer_blocking_duration_secs': 1.2802221775054932, 'get_old_steps_start_time': 1776736814.917435, 'get_old_steps_duration_secs': 2.6464462280273438e-05, 'checkpoint_manager_blocking_start_time': 1776736813.63333, 'checkpoint_manager_blocking_duration_secs': 1.7154946327209473}
I0421 02:00:15.348975 136415047964480 checkpointing.py:408] Started an asynchronous checkpoint save for step 10
I0421 02:00:15.349027 136415047964480 max_utils.py:750]
Memstats: After params initialized:
I0421 02:00:15.349083 136415047964480 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_2(process=1,(2,0,0,0))
I0421 02:00:15.349117 136415047964480 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_3(process=1,(3,0,0,0))
I0421 02:00:15.349148 136415047964480 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_6(process=1,(2,1,0,0))
I0421 02:00:15.349174 136415047964480 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_7(process=1,(3,1,0,0))
I0421 02:00:15.610551 136415047964480 metric_logger.py:185] completed step: 10, seconds: 10.894, TFLOP/s/device: 1.247, Tokens/s/device: 187.996, total_weights: 65536, loss: 6.833
I0421 02:00:15.773159 136415047964480 metric_logger.py:185] completed step: 11, seconds: 2.423, TFLOP/s/device: 5.607, Tokens/s/device: 845.133, total_weights: 65536, loss: 6.528
I0421 02:00:15.920936 136415047964480 metric_logger.py:185] completed step: 12, seconds: 0.016, TFLOP/s/device: 874.783, Tokens/s/device: 131856.812, total_weights: 65536, loss: 6.265
I0421 02:00:16.068460 136415047964480 metric_logger.py:185] completed step: 13, seconds: 0.153, TFLOP/s/device: 89.026, Tokens/s/device: 13419.037, total_weights: 65536, loss: 6.045
I0421 02:00:16.073483 136415047964480 checkpointing.py:772] Waiting for step 15 to finish before checkpoint...
I0421 02:00:16.363074 136415047964480 checkpointing.py:776] Waited 0.28957200050354004 seconds for step 15 to finish before starting checkpointing.
I0421 02:00:16.365876 136415047964480 checkpoint_manager.py:2024] [process=1][thread=MainThread][step=10][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0421 02:00:21.059700 136290536232704 array_metadata_store.py:203] [process=1][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_true/checkpoints/10/items/array_metadatas/process_1
I0421 02:00:56.520648 136294327899904 base_pytree_checkpoint_handler.py:129] [process=1] /jax/checkpoint/write/gbytes_per_sec: 37.499 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.123204708099365 s) (per-host)
I0421 02:00:56.520750 136294327899904 async_checkpointer.py:90] [process=1][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.603512s.
I0421 02:01:05.725008 136294327899904 async_checkpointer.py:144] [process=1][thread=async_save] Background save thread done. Time taken: 50.807752s.
I0421 02:01:05.725288 136289998546688 async_checkpointer.py:273] [process=1][thread=save_finalize] Done with waiting for background save thread=async_save.
I0421 02:01:05.725436 136289998546688 async_checkpointer.py:283] [process=1][thread=save_finalize] No errors found in background save thread=async_save.
I0421 02:01:05.725488 136289998546688 checkpoint_manager.py:2133] [process=1][thread=save_finalize][step=10] CheckpointManager Save Finalize is syncing with other hosts...
I0421 02:01:05.726908 136289998546688 checkpoint_manager.py:2142] [process=1][thread=save_finalize][step=10] CheckpointManager Save Finalize is done on all hosts.
I0421 02:01:05.727102 136415047964480 checkpoint_manager.py:2036] [process=1][thread=MainThread][step=10][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=10.
W0421 02:01:05.727232 136415047964480 checkpoint_manager.py:1458] Waiting for previous save to complete took 49.361360 seconds. If this number is high, consider checkpointing less frequently.
I0421 02:01:05.729221 136415047964480 checkpoint_manager.py:1518] [process=1] Saving checkpoint at step 15
I0421 02:01:05.733538 136415047964480 async_checkpointer.py:452] [process=1] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_true/checkpoints/15.
I0421 02:01:06.688373 136415047964480 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array.
I0421 02:01:06.688485 136415047964480 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False
I0421 02:01:06.731339 136415047964480 base_pytree_checkpoint_handler.py:153] [process=1][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.044182s
I0421 02:01:06.731522 136415047964480 base_pytree_checkpoint_handler.py:129] [process=1] /jax/checkpoint/write/blocking_gbytes_per_sec: 5.307 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2906501293182373 s) (per-host)
I0421 02:01:06.731576 136415047964480 base_pytree_checkpoint_handler.py:737] [process=1][thread=MainThread] Initiated Pytree async_save. Time taken: 0.290713s (batch_requests_ready=0.244569s, total_serialization_initiated=0.046072s, others=0.000072s)
I0421 02:01:06.731671 136415047964480 composite_checkpoint_handler.py:715] [process=1][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.295869s (all_items=0.000013s, per_item={'items': '0.00001335'}, temp_paths=0.295856)
I0421 02:01:06.732546 136290553018112 async_checkpointer.py:79] [process=1][thread=async_save] Background save thread started.
I0421 02:01:06.732709 136415047964480 async_checkpointer.py:561] Finished blocking save. Time taken: 1.003415s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_true/checkpoints/15.
I0421 02:01:07.182352 136415047964480 checkpoint_manager.py:1566] [process=1][thread=MainThread][step=15] Starting CheckpointManager Save Finalize thread=save_finalize
I0421 02:01:07.182733 136289998546688 async_checkpointer.py:265] [process=1][thread=save_finalize] Waiting for background save thread=async_save.
I0421 02:01:07.182904 136415047964480 standard_logger.py:34] {'step': 15, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776736816.3658478, 'wait_for_prev_duration_secs': 49.3613600730896, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776736865.729259, 'checkpointer_blocking_duration_secs': 1.0035557746887207, 'get_old_steps_start_time': 1776736866.7328348, 'get_old_steps_duration_secs': 2.7179718017578125e-05, 'checkpoint_manager_blocking_start_time': 1776736816.3637512, 'checkpoint_manager_blocking_duration_secs': 50.81911754608154}
I0421 02:01:07.183014 136415047964480 checkpointing.py:408] Started an asynchronous checkpoint save for step 15
I0421 02:01:07.183637 136415047964480 metric_logger.py:185] completed step: 14, seconds: 0.148, TFLOP/s/device: 91.963, Tokens/s/device: 13861.627, total_weights: 65536, loss: 5.864
I0421 02:01:07.189082 136415047964480 metric_logger.py:185] completed step: 15, seconds: 0.148, TFLOP/s/device: 91.672, Tokens/s/device: 13817.765, total_weights: 65536, loss: 5.719
I0421 02:01:25.115704 136415047964480 metric_logger.py:185] completed step: 16, seconds: 51.115, TFLOP/s/device: 0.266, Tokens/s/device: 40.067, total_weights: 65536, loss: 5.605
I0421 02:01:25.263075 136415047964480 metric_logger.py:185] completed step: 17, seconds: 17.780, TFLOP/s/device: 0.764, Tokens/s/device: 115.184, total_weights: 65536, loss: 5.517
I0421 02:01:25.410682 136415047964480 metric_logger.py:185] completed step: 18, seconds: 0.152, TFLOP/s/device: 89.444, Tokens/s/device: 13482.022, total_weights: 65536, loss: 5.448
I0421 02:01:25.557975 136415047964480 checkpointing.py:772] Waiting for step 19 to finish before checkpoint...
I0421 02:01:25.558639 136415047964480 checkpointing.py:776] Waited 0.0006844997406005859 seconds for step 19 to finish before starting checkpointing.
I0421 02:01:25.560729 136415047964480 checkpoint_manager.py:2024] [process=1][thread=MainThread][step=15][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0421 02:01:33.511958 136290536232704 array_metadata_store.py:203] [process=1][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_true/checkpoints/15/items/array_metadatas/process_1
I0421 02:02:07.916672 136290553018112 base_pytree_checkpoint_handler.py:129] [process=1] /jax/checkpoint/write/gbytes_per_sec: 25.695 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 61.475759983062744 s) (per-host)
I0421 02:02:07.916790 136290553018112 async_checkpointer.py:90] [process=1][thread=async_save] 3 Handler Commit operations completed. Time taken: 61.184132s.
I0421 02:02:18.751256 136290553018112 async_checkpointer.py:144] [process=1][thread=async_save] Background save thread done. Time taken: 72.018580s.
I0421 02:02:18.751570 136289998546688 async_checkpointer.py:273] [process=1][thread=save_finalize] Done with waiting for background save thread=async_save.
I0421 02:02:18.751710 136289998546688 async_checkpointer.py:283] [process=1][thread=save_finalize] No errors found in background save thread=async_save.
I0421 02:02:18.751760 136289998546688 checkpoint_manager.py:2133] [process=1][thread=save_finalize][step=15] CheckpointManager Save Finalize is syncing with other hosts...
I0421 02:02:18.753339 136289998546688 checkpoint_manager.py:2142] [process=1][thread=save_finalize][step=15] CheckpointManager Save Finalize is done on all hosts.
I0421 02:02:18.753520 136415047964480 checkpoint_manager.py:2036] [process=1][thread=MainThread][step=15][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=15.
W0421 02:02:18.753656 136415047964480 checkpoint_manager.py:1458] Waiting for previous save to complete took 53.192938 seconds. If this number is high, consider checkpointing less frequently.
I0421 02:02:18.755276 136415047964480 checkpoint_manager.py:1518] [process=1] Saving checkpoint at step 19
I0421 02:02:18.759050 136415047964480 async_checkpointer.py:452] [process=1] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_true/checkpoints/19.
I0421 02:02:19.735848 136415047964480 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array.
I0421 02:02:19.735943 136415047964480 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False
I0421 02:02:19.777934 136415047964480 base_pytree_checkpoint_handler.py:153] [process=1][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.043253s
I0421 02:02:19.778102 136415047964480 base_pytree_checkpoint_handler.py:129] [process=1] /jax/checkpoint/write/blocking_gbytes_per_sec: 5.313 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.29036521911621094 s) (per-host)
I0421 02:02:19.778152 136415047964480 base_pytree_checkpoint_handler.py:737] [process=1][thread=MainThread] Initiated Pytree async_save. Time taken: 0.290425s (batch_requests_ready=0.245073s, total_serialization_initiated=0.045287s, others=0.000065s)
I0421 02:02:19.778242 136415047964480 composite_checkpoint_handler.py:715] [process=1][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.294468s (all_items=0.000013s, per_item={'items': '0.00001287'}, temp_paths=0.294455)
I0421 02:02:19.779147 136294319507200 async_checkpointer.py:79] [process=1][thread=async_save] Background save thread started.
I0421 02:02:19.779305 136415047964480 async_checkpointer.py:561] Finished blocking save. Time taken: 1.023958s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_true/checkpoints/19.
I0421 02:02:20.230687 136415047964480 checkpoint_manager.py:1566] [process=1][thread=MainThread][step=19] Starting CheckpointManager Save Finalize thread=save_finalize
I0421 02:02:20.231037 136289998546688 async_checkpointer.py:265] [process=1][thread=save_finalize] Waiting for background save thread=async_save.
I0421 02:02:20.231207 136415047964480 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776736885.5607028, 'wait_for_prev_duration_secs': 53.19293761253357, 'time_between_consecutive_saves_sec': 19.833755016326904, 'checkpointer_blocking_start_time': 1776736938.7553158, 'checkpointer_blocking_duration_secs': 1.0241153240203857, 'get_old_steps_start_time': 1776736939.779445, 'get_old_steps_duration_secs': 2.0742416381835938e-05, 'checkpoint_manager_blocking_start_time': 1776736885.5588627, 'checkpoint_manager_blocking_duration_secs': 54.67231011390686}
I0421 02:02:20.231314 136415047964480 checkpointing.py:408] Started an asynchronous checkpoint save for step 19
I0421 02:02:20.231357 136415047964480 checkpoint_manager.py:2024] [process=1][thread=MainThread][step=19][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0421 02:02:27.956300 136294327899904 array_metadata_store.py:203] [process=1][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_true/checkpoints/19/items/array_metadatas/process_1
I0421 02:03:02.887104 136294319507200 base_pytree_checkpoint_handler.py:129] [process=1] /jax/checkpoint/write/gbytes_per_sec: 36.397 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 43.399333477020264 s) (per-host)
I0421 02:03:02.887210 136294319507200 async_checkpointer.py:90] [process=1][thread=async_save] 3 Handler Commit operations completed. Time taken: 43.107953s.
I0421 02:03:12.688557 136294319507200 async_checkpointer.py:144] [process=1][thread=async_save] Background save thread done. Time taken: 52.909284s.
I0421 02:03:12.688833 136289998546688 async_checkpointer.py:273] [process=1][thread=save_finalize] Done with waiting for background save thread=async_save.
I0421 02:03:12.688957 136289998546688 async_checkpointer.py:283] [process=1][thread=save_finalize] No errors found in background save thread=async_save.
I0421 02:03:12.689000 136289998546688 checkpoint_manager.py:2133] [process=1][thread=save_finalize][step=19] CheckpointManager Save Finalize is syncing with other hosts...
I0421 02:03:12.690648 136289998546688 checkpoint_manager.py:2142] [process=1][thread=save_finalize][step=19] CheckpointManager Save Finalize is done on all hosts.
I0421 02:03:12.690822 136415047964480 checkpoint_manager.py:2036] [process=1][thread=MainThread][step=19][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=19.
I0421 02:03:12.690961 136415047964480 checkpoint_manager.py:2013] [process=1][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0421 02:03:12.691662 136415047964480 metric_logger.py:185] completed step: 19, seconds: 0.148, TFLOP/s/device: 91.836, Tokens/s/device: 13842.514, total_weights: 65536, loss: 5.391
Per train step:
Total TFLOPs: 13.59
split as 93.93% learnable weight flops and 6.07% attention flops
XPK End: Tue Apr 21 02:03:25 UTC 2026
EXIT_CODE=0