MaxView

XPK Start: Wed Apr 22 11:09:39 UTC 2026
PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used.
2026-04-22 11:10:03.044399: 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)
I0422 11:10:03.581005 138774005802816 max_utils.py:273] Attempting to initialize the jax distributed system...
I0422 11:10:12.623067 138774005802816 distributed.py:149] Starting JAX distributed service on [::]:8482
I0422 11:10:12.625452 138774005802816 distributed.py:172] Connecting to JAX distributed service on mt-01-base-2rax0-slice-job-0-0.mt-01-base-2rax0:8482
I0422 11:10:14.146397 138774005802816 max_utils.py:284] Jax distributed system initialized!
I0422 11:10:20.293666 138774005802816 max_utils.py:800] System Information: Jax Version: 0.9.2
I0422 11:10:20.293764 138774005802816 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0422 11:10:20.293805 138774005802816 max_utils.py:802] System Information: Jax Backend: PJRT C API
TFRT TPU v6 lite
Built on Mar 4 2026 11:32:08 (1772652728) cl/878335365
I0422 11:10:20.293839 138774005802816 train_utils.py:378] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0422 11:10:20.991184 138774005802816 maxtext_utils.py:1718] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0422 11:10:21.103431 138774005802816 checkpointing.py:688] Setting up checkpoint logger...
I0422 11:10:21.103543 138774005802816 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True
I0422 11:10:21.103586 138774005802816 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0422 11:10:21.103778 138774005802816 base_pytree_checkpoint_handler.py:441] 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 0x7e36491ee6c0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0422 11:10:24.648560 138774005802816 checkpointing.py:266] Enabling policy for fixed interval checkpointing.
I0422 11:10:24.648793 138774005802816 checkpoint_manager.py:708] [process=6][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e21bc54fb90>}, handler_registry=None
I0422 11:10:24.649024 138774005802816 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e21bc54fb90>` 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`.
I0422 11:10:24.649072 138774005802816 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e21bc1aa000>` 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`.
I0422 11:10:24.649127 138774005802816 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 0x7e21bc54fb90>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e21bc54fb90>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e21bc1aa000>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e21bc1aa000>}).
I0422 11:10:24.649431 138774005802816 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0422 11:10:24.649510 138774005802816 async_checkpointer.py:192] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7e21a44cd760> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0422 11:10:25.914834 138774005802816 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106_01_base/checkpoints
I0422 11:10:26.355304 138774005802816 checkpoint_manager.py:929] [process=6][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=10), 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/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106_01_base/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7e21bc17a8a0>
I0422 11:10:26.355468 138774005802816 checkpointing.py:302] Checkpoint manager created!
I0422 11:10:27.318001 138774005802816 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint
I0422 11:10:27.318127 138774005802816 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint.
fsdp: 32

I0422 11:10:29.091382 138774005802816 nnx_decoders.py:465] nnx_decoders/carry Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0422 11:10:29.091473 138774005802816 nnx_decoders.py:465] nnx_decoders/carry Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0422 11:10:29.097017 138774005802816 nnx_decoders.py:465] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0422 11:10:29.097073 138774005802816 nnx_decoders.py:465] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0422 11:10:29.113534 138774005802816 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0422 11:10:29.113594 138774005802816 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0422 11:10:29.129158 138774005802816 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0422 11:10:29.129214 138774005802816 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0422 11:10:29.152960 138774005802816 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0422 11:10:29.153026 138774005802816 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0422 11:10:29.168654 138774005802816 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0422 11:10:29.168714 138774005802816 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0422 11:10:29.184378 138774005802816 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0422 11:10:29.184437 138774005802816 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0422 11:10:29.214235 138774005802816 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0422 11:10:29.214307 138774005802816 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0422 11:10:29.233926 138774005802816 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0422 11:10:29.233989 138774005802816 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0422 11:10:40.469922 138774005802816 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.
I0422 11:10:40.472379 138774005802816 metric_logger.py:301] number parameters: 1.104 billion
I0422 11:10:51.682729 138774005802816 checkpointing.py:794] Waiting for step 0 to finish before checkpoint...
I0422 11:10:51.833871 138774005802816 checkpointing.py:798] Waited 0.15112996101379395 seconds for step 0 to finish before starting checkpointing.
I0422 11:10:51.836423 138774005802816 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0422 11:10:51.837996 138774005802816 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 0
I0422 11:10:51.839436 138774005802816 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106_01_base/checkpoints/0.
I0422 11:10:52.182631 138774005802816 signaling_client.py:364] Using JaxDistributedSignalingClient
I0422 11:10:52.183535 138774005802816 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array.
I0422 11:10:52.183592 138774005802816 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
I0422 11:10:52.464540 138774005802816 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.282676s
I0422 11:10:52.464705 138774005802816 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 5.288 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2917332649230957 s) (per-host)
I0422 11:10:52.464756 138774005802816 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.291794s (batch_requests_ready=0.002981s, total_serialization_initiated=0.288744s, others=0.000068s)
I0422 11:10:52.464855 138774005802816 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.295869s (all_items=0.000019s, per_item={'items': '0.00001860'}, temp_paths=0.295850)
I0422 11:10:52.465679 138774005802816 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.63 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106_01_base/checkpoints/0.
I0422 11:10:52.465960 138644740359936 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-22 11:30:52.465927
I0422 11:10:52.473084 138774005802816 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0422 11:10:52.473387 138643654039296 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0422 11:10:52.473537 138774005802816 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106_01_base/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776856251.8364031, 'wait_for_prev_duration_secs': 6.747245788574219e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776856251.8380353, 'checkpointer_blocking_duration_secs': 0.628084659576416, 'get_old_steps_start_time': 1776856252.4661446, 'get_old_steps_duration_secs': 3.123283386230469e-05, 'checkpoint_manager_blocking_start_time': 1776856251.8342648, 'checkpoint_manager_blocking_duration_secs': 0.6392354965209961}
I0422 11:10:52.473649 138774005802816 checkpointing.py:409] Started an asynchronous checkpoint save for step 0
I0422 11:10:52.473716 138774005802816 max_utils.py:750] 
Memstats: After params initialized:
I0422 11:10:52.473765 138774005802816 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0))
I0422 11:10:52.473796 138774005802816 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0))
I0422 11:10:52.473823 138774005802816 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0))
I0422 11:10:52.473847 138774005802816 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0))
I0422 11:10:52.784017 138774005802816 metric_logger.py:196] completed step: 0, seconds: 11.209, TFLOP/s/device: 1.212, Tokens/s/device: 182.706, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52786.469
I0422 11:10:52.956708 138774005802816 metric_logger.py:196] completed step: 1, seconds: 1.099, TFLOP/s/device: 12.364, Tokens/s/device: 1863.645, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52786.469
I0422 11:10:53.387810 138774005802816 metric_logger.py:196] completed step: 2, seconds: 0.027, TFLOP/s/device: 504.123, Tokens/s/device: 75986.940, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28632.133
I0422 11:10:53.535508 138774005802816 metric_logger.py:196] completed step: 3, seconds: 0.421, TFLOP/s/device: 32.286, Tokens/s/device: 4866.515, total_weights: 65536, loss: 9.732, lm_loss: 9.732, perplexity: 16855.789
I0422 11:10:53.831288 138774005802816 metric_logger.py:196] completed step: 4, seconds: 0.164, TFLOP/s/device: 82.634, Tokens/s/device: 12455.451, total_weights: 65536, loss: 9.274, lm_loss: 9.274, perplexity: 10661.594
I0422 11:10:53.838374 138774005802816 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.267, Tokens/s/device: 13907.469, total_weights: 65536, loss: 8.888, lm_loss: 8.888, perplexity: 7245.978
I0422 11:10:55.713841    2811 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0422 11:10:58.192197 138643662432000 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106_01_base/checkpoints/0/items/array_metadatas/process_6
I0422 11:11:16.211457 138774005802816 metric_logger.py:196] completed step: 6, seconds: 0.296, TFLOP/s/device: 45.879, Tokens/s/device: 6915.438, total_weights: 65536, loss: 8.589, lm_loss: 8.589, perplexity: 5371.156
I0422 11:11:16.359244 138774005802816 metric_logger.py:196] completed step: 7, seconds: 22.227, TFLOP/s/device: 0.611, Tokens/s/device: 92.141, total_weights: 65536, loss: 8.380, lm_loss: 8.380, perplexity: 4360.465
I0422 11:11:16.506857 138774005802816 metric_logger.py:196] completed step: 8, seconds: 0.153, TFLOP/s/device: 88.644, Tokens/s/device: 13361.343, total_weights: 65536, loss: 8.251, lm_loss: 8.251, perplexity: 3831.256
I0422 11:11:16.654970 138774005802816 checkpointing.py:794] Waiting for step 9 to finish before checkpoint...
I0422 11:11:16.655661 138774005802816 checkpointing.py:798] Waited 0.0007033348083496094 seconds for step 9 to finish before starting checkpointing.
I0422 11:11:16.657643 138774005802816 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0422 11:11:29.083895 138644740359936 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 42.795 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 36.910900831222534 s) (per-host)
I0422 11:11:29.084003 138644740359936 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 36.617935s.
I0422 11:11:36.956389 138644740359936 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 44.490304s.
I0422 11:11:36.956706 138643654039296 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0422 11:11:36.956766 138643654039296 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0422 11:11:36.956813 138643654039296 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0422 11:11:36.959440 138643654039296 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0422 11:11:36.959652 138774005802816 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0422 11:11:36.959789 138774005802816 checkpoint_manager.py:1452] Waiting for previous save to complete took 20.302148 seconds. If this number is high, consider checkpointing less frequently.
I0422 11:11:36.961562 138774005802816 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 9
I0422 11:11:36.964052 138774005802816 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106_01_base/checkpoints/9.
I0422 11:11:37.251876 138774005802816 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array.
I0422 11:11:37.251967 138774005802816 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
I0422 11:11:37.294553 138774005802816 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.044261s
I0422 11:11:37.294751 138774005802816 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 30.046 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.051340341567993164 s) (per-host)
I0422 11:11:37.294800 138774005802816 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.051399s (batch_requests_ready=0.002630s, total_serialization_initiated=0.048703s, others=0.000066s)
I0422 11:11:37.294889 138774005802816 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.055506s (all_items=0.000016s, per_item={'items': '0.00001621'}, temp_paths=0.055490)
I0422 11:11:37.295530 138774005802816 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.33 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106_01_base/checkpoints/9.
I0422 11:11:37.295873 138643654039296 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-22 11:31:37.295837
I0422 11:11:37.298009 138774005802816 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0422 11:11:37.298331 138637739087616 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0422 11:11:37.298494 138774005802816 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106_01_base/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776856276.6576133, 'wait_for_prev_duration_secs': 20.30214762687683, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776856296.9616017, 'checkpointer_blocking_duration_secs': 0.33441781997680664, 'get_old_steps_start_time': 1776856297.2960439, 'get_old_steps_duration_secs': 3.170967102050781e-05, 'checkpoint_manager_blocking_start_time': 1776856276.6558912, 'checkpoint_manager_blocking_duration_secs': 20.642565965652466}
I0422 11:11:37.298617 138774005802816 checkpointing.py:409] Started an asynchronous checkpoint save for step 9
I0422 11:11:37.298661 138774005802816 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0422 11:11:43.223080 138643662432000 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106_01_base/checkpoints/9/items/array_metadatas/process_6
I0422 11:12:20.054771 138643654039296 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 36.897 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.81131911277771 s) (per-host)
I0422 11:12:20.054898 138643654039296 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.758913s.
I0422 11:12:27.868805 138643654039296 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 50.572805s.
I0422 11:12:27.869131 138637739087616 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0422 11:12:27.869249 138637739087616 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0422 11:12:27.869301 138637739087616 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0422 11:12:27.870904 138637739087616 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0422 11:12:27.871079 138774005802816 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9.
I0422 11:12:27.871257 138774005802816 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0422 11:12:27.872326 138774005802816 metric_logger.py:196] completed step: 9, seconds: 0.148, TFLOP/s/device: 91.718, Tokens/s/device: 13824.667, total_weights: 65536, loss: 8.175, lm_loss: 8.175, perplexity: 3551.438
Per train step:
 Total TFLOPs: 13.59 
 split as 93.93% learnable weight flops and 6.07% attention flops
XPK End: Wed Apr 22 11:12:39 UTC 2026
EXIT_CODE=0