MaxView

XPK Start: Tue Apr 21 10:11:39 UTC 2026
PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used.
2026-04-21 10:12:02.893850: 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 10:12:03.425938 135767673501504 max_utils.py:273] Attempting to initialize the jax distributed system...
I0421 10:12:12.466530 135767673501504 distributed.py:149] Starting JAX distributed service on [::]:8482
I0421 10:12:12.468885 135767673501504 distributed.py:172] Connecting to JAX distributed service on mt-02-synthetic-62127-slice-job-0-0.mt-02-synthetic-62127:8482
I0421 10:12:13.693826 135767673501504 max_utils.py:284] Jax distributed system initialized!
I0421 10:12:19.991929 135767673501504 max_utils.py:800] System Information: Jax Version: 0.9.2
I0421 10:12:19.992030 135767673501504 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0421 10:12:19.992073 135767673501504 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
I0421 10:12:19.992106 135767673501504 train_utils.py:378] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0421 10:12:20.693997 135767673501504 maxtext_utils.py:1718] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0421 10:12:20.807522 135767673501504 checkpointing.py:688] Setting up checkpoint logger...
I0421 10:12:20.807633 135767673501504 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True
I0421 10:12:20.807693 135767673501504 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0421 10:12:20.807887 135767673501504 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 0x7b7a3d1ee600>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0421 10:12:24.122457 135767673501504 checkpointing.py:266] Enabling policy for fixed interval checkpointing.
I0421 10:12:24.122656 135767673501504 checkpoint_manager.py:708] [process=4][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7b66104c6450>}, handler_registry=None
I0421 10:12:24.122890 135767673501504 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7b66104c6450>` 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 10:12:24.122937 135767673501504 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7b661025d9d0>` 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 10:12:24.122972 135767673501504 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 0x7b66104c6450>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7b66104c6450>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7b661025d9d0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7b661025d9d0>}).
I0421 10:12:24.123291 135767673501504 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0421 10:12:24.123363 135767673501504 async_checkpointer.py:192] [process=4][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7b6610275760> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0421 10:12:24.805891 135767673501504 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238_02_synthetic/checkpoints
I0421 10:12:25.250190 135767673501504 checkpoint_manager.py:929] [process=4][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_20260421_083238/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238_02_synthetic/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7b65f82f5fa0>
I0421 10:12:25.250361 135767673501504 checkpointing.py:302] Checkpoint manager created!
I0421 10:12:26.216331 135767673501504 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint
I0421 10:12:26.216442 135767673501504 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint.
fsdp: 32

I0421 10:12:27.973372 135767673501504 nnx_decoders.py:465] nnx_decoders/carry Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0421 10:12:27.973463 135767673501504 nnx_decoders.py:465] nnx_decoders/carry Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0421 10:12:27.979074 135767673501504 nnx_decoders.py:465] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0421 10:12:27.979129 135767673501504 nnx_decoders.py:465] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0421 10:12:27.995287 135767673501504 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0421 10:12:27.995351 135767673501504 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0421 10:12:28.010831 135767673501504 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0421 10:12:28.010886 135767673501504 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0421 10:12:28.034878 135767673501504 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0421 10:12:28.034947 135767673501504 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 10:12:28.050765 135767673501504 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0421 10:12:28.050823 135767673501504 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 10:12:28.066292 135767673501504 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0421 10:12:28.066349 135767673501504 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 10:12:28.096133 135767673501504 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0421 10:12:28.096203 135767673501504 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 10:12:28.115925 135767673501504 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0421 10:12:28.115991 135767673501504 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0421 10:12:39.406495 135767673501504 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 10:12:39.408745 135767673501504 metric_logger.py:301] number parameters: 1.104 billion
I0421 10:12:50.754562 135767673501504 checkpointing.py:794] Waiting for step 0 to finish before checkpoint...
I0421 10:12:50.905675 135767673501504 checkpointing.py:798] Waited 0.15107369422912598 seconds for step 0 to finish before starting checkpointing.
I0421 10:12:50.908339 135767673501504 checkpoint_manager.py:2009] [process=4][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0421 10:12:50.910190 135767673501504 checkpoint_manager.py:1512] [process=4] Saving checkpoint at step 0
I0421 10:12:50.911619 135767673501504 event_tracking.py:70] [process=4] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238_02_synthetic/checkpoints/0.
I0421 10:12:51.287842 135767673501504 signaling_client.py:364] Using JaxDistributedSignalingClient
I0421 10:12:51.288837 135767673501504 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array.
I0421 10:12:51.288894 135767673501504 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 10:12:51.566469 135767673501504 base_pytree_checkpoint_handler.py:154] [process=4][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.279413s
I0421 10:12:51.566667 135767673501504 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/blocking_gbytes_per_sec: 5.343 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2887275218963623 s) (per-host)
I0421 10:12:51.566728 135767673501504 base_pytree_checkpoint_handler.py:768] [process=4][thread=MainThread] Initiated Pytree async_save. Time taken: 0.288818s (batch_requests_ready=0.003156s, total_serialization_initiated=0.285561s, others=0.000101s)
I0421 10:12:51.566854 135767673501504 composite_checkpoint_handler.py:715] [process=4][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.292922s (all_items=0.000018s, per_item={'items': '0.00001764'}, temp_paths=0.292904)
I0421 10:12:51.567685 135767673501504 event_tracking.py:125] [process=4] [async] Finished blocking save in 0.66 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238_02_synthetic/checkpoints/0.
I0421 10:12:51.568025 135639775180544 async_checkpointer.py:76] [process=4][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-21 10:32:51.567987
I0421 10:12:51.578388 135767673501504 checkpoint_manager.py:1560] [process=4][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0421 10:12:51.578660 135632747747072 async_checkpointer.py:280] [process=4][thread=save_finalize] Waiting for background save thread=async_save.
I0421 10:12:51.578809 135767673501504 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238_02_synthetic/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776766370.9083228, 'wait_for_prev_duration_secs': 5.984306335449219e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776766370.910228, 'checkpointer_blocking_duration_secs': 0.6579568386077881, 'get_old_steps_start_time': 1776766371.5682106, 'get_old_steps_duration_secs': 2.8133392333984375e-05, 'checkpoint_manager_blocking_start_time': 1776766370.9060621, 'checkpoint_manager_blocking_duration_secs': 0.6727099418640137}
I0421 10:12:51.578916 135767673501504 checkpointing.py:409] Started an asynchronous checkpoint save for step 0
I0421 10:12:51.578985 135767673501504 max_utils.py:750] 
Memstats: After params initialized:
I0421 10:12:51.579032 135767673501504 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_16(process=4,(0,4,0,0))
I0421 10:12:51.579066 135767673501504 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_17(process=4,(1,4,0,0))
I0421 10:12:51.579092 135767673501504 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_20(process=4,(0,5,0,0))
I0421 10:12:51.579116 135767673501504 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_21(process=4,(1,5,0,0))
I0421 10:12:51.890252 135767673501504 metric_logger.py:196] completed step: 0, seconds: 11.345, TFLOP/s/device: 1.198, Tokens/s/device: 180.524, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52786.469
I0421 10:12:52.065884 135767673501504 metric_logger.py:196] completed step: 1, seconds: 1.134, TFLOP/s/device: 11.985, Tokens/s/device: 1806.452, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52786.469
I0421 10:12:52.510547 135767673501504 metric_logger.py:196] completed step: 2, seconds: 0.030, TFLOP/s/device: 458.839, Tokens/s/device: 69161.151, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28632.133
I0421 10:12:52.658188 135767673501504 metric_logger.py:196] completed step: 3, seconds: 0.434, TFLOP/s/device: 31.272, Tokens/s/device: 4713.616, total_weights: 65536, loss: 9.732, lm_loss: 9.732, perplexity: 16855.789
I0421 10:12:52.953971 135767673501504 metric_logger.py:196] completed step: 4, seconds: 0.164, TFLOP/s/device: 82.748, Tokens/s/device: 12472.746, total_weights: 65536, loss: 9.274, lm_loss: 9.274, perplexity: 10661.594
I0421 10:12:52.961062 135767673501504 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.207, Tokens/s/device: 13898.503, total_weights: 65536, loss: 8.888, lm_loss: 8.888, perplexity: 7245.978
I0421 10:12:55.308839    2805 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0421 10:12:57.787249 135633293010688 array_metadata_store.py:203] [process=4][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238_02_synthetic/checkpoints/0/items/array_metadatas/process_4
I0421 10:13:15.496563 135767673501504 metric_logger.py:196] completed step: 6, seconds: 0.296, TFLOP/s/device: 45.906, Tokens/s/device: 6919.480, total_weights: 65536, loss: 8.589, lm_loss: 8.589, perplexity: 5371.156
I0421 10:13:15.644286 135767673501504 metric_logger.py:196] completed step: 7, seconds: 22.389, TFLOP/s/device: 0.607, Tokens/s/device: 91.474, total_weights: 65536, loss: 8.380, lm_loss: 8.380, perplexity: 4360.465
I0421 10:13:15.791769 135767673501504 metric_logger.py:196] completed step: 8, seconds: 0.154, TFLOP/s/device: 88.396, Tokens/s/device: 13324.052, total_weights: 65536, loss: 8.251, lm_loss: 8.251, perplexity: 3831.256
I0421 10:13:15.940070 135767673501504 checkpointing.py:794] Waiting for step 9 to finish before checkpoint...
I0421 10:13:15.940744 135767673501504 checkpointing.py:798] Waited 0.0006849765777587891 seconds for step 9 to finish before starting checkpointing.
I0421 10:13:15.942710 135767673501504 checkpoint_manager.py:2020] [process=4][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0421 10:13:29.508128 135639775180544 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/gbytes_per_sec: 41.318 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 38.2301709651947 s) (per-host)
I0421 10:13:29.508257 135639775180544 async_checkpointer.py:90] [process=4][thread=async_save] 3 Handler Commit operations completed. Time taken: 37.940111s.
I0421 10:13:37.846351 135639775180544 async_checkpointer.py:160] [process=4][thread=async_save] Background save thread done. Time taken: 46.278193s.
I0421 10:13:37.846694 135632747747072 async_checkpointer.py:288] [process=4][thread=save_finalize] Done with waiting for background save thread=async_save.
I0421 10:13:37.846814 135632747747072 async_checkpointer.py:298] [process=4][thread=save_finalize] No errors found in background save thread=async_save.
I0421 10:13:37.846866 135632747747072 checkpoint_manager.py:2137] [process=4][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0421 10:13:37.849511 135632747747072 checkpoint_manager.py:2146] [process=4][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0421 10:13:37.849730 135767673501504 checkpoint_manager.py:2032] [process=4][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0421 10:13:37.849873 135767673501504 checkpoint_manager.py:1452] Waiting for previous save to complete took 21.907159 seconds. If this number is high, consider checkpointing less frequently.
I0421 10:13:37.851861 135767673501504 checkpoint_manager.py:1512] [process=4] Saving checkpoint at step 9
I0421 10:13:37.854113 135767673501504 event_tracking.py:70] [process=4] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238_02_synthetic/checkpoints/9.
I0421 10:13:38.143532 135767673501504 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array.
I0421 10:13:38.143626 135767673501504 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 10:13:38.184261 135767673501504 base_pytree_checkpoint_handler.py:154] [process=4][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.042278s
I0421 10:13:38.184406 135767673501504 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/blocking_gbytes_per_sec: 31.180 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.049472808837890625 s) (per-host)
I0421 10:13:38.184456 135767673501504 base_pytree_checkpoint_handler.py:768] [process=4][thread=MainThread] Initiated Pytree async_save. Time taken: 0.049531s (batch_requests_ready=0.002885s, total_serialization_initiated=0.046582s, others=0.000064s)
I0421 10:13:38.184545 135767673501504 composite_checkpoint_handler.py:715] [process=4][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.053689s (all_items=0.000015s, per_item={'items': '0.00001478'}, temp_paths=0.053674)
I0421 10:13:38.185195 135767673501504 event_tracking.py:125] [process=4] [async] Finished blocking save in 0.33 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238_02_synthetic/checkpoints/9.
I0421 10:13:38.185480 135632747747072 async_checkpointer.py:76] [process=4][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-21 10:33:38.185457
I0421 10:13:38.187822 135767673501504 checkpoint_manager.py:1560] [process=4][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0421 10:13:38.188104 135633293010688 async_checkpointer.py:280] [process=4][thread=save_finalize] Waiting for background save thread=async_save.
I0421 10:13:38.188272 135767673501504 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238_02_synthetic/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776766395.9426823, 'wait_for_prev_duration_secs': 21.907159090042114, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776766417.8518999, 'checkpointer_blocking_duration_secs': 0.3336813449859619, 'get_old_steps_start_time': 1776766418.1856048, 'get_old_steps_duration_secs': 3.0994415283203125e-05, 'checkpoint_manager_blocking_start_time': 1776766395.9409735, 'checkpoint_manager_blocking_duration_secs': 22.24725890159607}
I0421 10:13:38.188391 135767673501504 checkpointing.py:409] Started an asynchronous checkpoint save for step 9
I0421 10:13:38.188437 135767673501504 checkpoint_manager.py:2020] [process=4][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0421 10:13:45.207627 135616922633984 array_metadata_store.py:203] [process=4][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238_02_synthetic/checkpoints/9/items/array_metadatas/process_4
I0421 10:14:21.094572 135632747747072 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/gbytes_per_sec: 36.769 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.95959234237671 s) (per-host)
I0421 10:14:21.094710 135632747747072 async_checkpointer.py:90] [process=4][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.909153s.
I0421 10:14:27.557679 135632747747072 async_checkpointer.py:160] [process=4][thread=async_save] Background save thread done. Time taken: 49.372085s.
I0421 10:14:27.558004 135633293010688 async_checkpointer.py:288] [process=4][thread=save_finalize] Done with waiting for background save thread=async_save.
I0421 10:14:27.558132 135633293010688 async_checkpointer.py:298] [process=4][thread=save_finalize] No errors found in background save thread=async_save.
I0421 10:14:27.558181 135633293010688 checkpoint_manager.py:2137] [process=4][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0421 10:14:27.560565 135633293010688 checkpoint_manager.py:2146] [process=4][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0421 10:14:27.560763 135767673501504 checkpoint_manager.py:2032] [process=4][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9.
I0421 10:14:27.560929 135767673501504 checkpoint_manager.py:2009] [process=4][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0421 10:14:27.561926 135767673501504 metric_logger.py:196] completed step: 9, seconds: 0.148, TFLOP/s/device: 91.740, Tokens/s/device: 13828.121, 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: Tue Apr 21 10:14:39 UTC 2026
EXIT_CODE=0