MaxView

XPK Start: Mon Apr 20 09:51:31 UTC 2026
PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used.
2026-04-20 09:51:55.629656: 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)
I0420 09:51:55.806369 138700832827200 max_utils.py:273] Attempting to initialize the jax distributed system...
I0420 09:52:04.845571 138700832827200 distributed.py:149] Starting JAX distributed service on [::]:8482
I0420 09:52:04.847974 138700832827200 distributed.py:172] Connecting to JAX distributed service on mt-02-synthetic-6uco0-slice-job-0-0.mt-02-synthetic-6uco0:8482
I0420 09:52:06.127053 138700832827200 max_utils.py:284] Jax distributed system initialized!
I0420 09:52:11.197300 138700832827200 max_utils.py:800] System Information: Jax Version: 0.9.2
I0420 09:52:11.197405 138700832827200 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0420 09:52:11.197445 138700832827200 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
I0420 09:52:11.197478 138700832827200 train_utils.py:378] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0420 09:52:12.265210 138700832827200 maxtext_utils.py:1718] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0420 09:52:12.378455 138700832827200 checkpointing.py:688] Setting up checkpoint logger...
I0420 09:52:12.378568 138700832827200 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True
I0420 09:52:12.378613 138700832827200 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0420 09:52:12.378805 138700832827200 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 0x7e25351ae6c0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0420 09:52:14.932442 138700832827200 checkpointing.py:266] Enabling policy for fixed interval checkpointing.
I0420 09:52:14.932630 138700832827200 checkpoint_manager.py:708] [process=2][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e240a19a810>}, handler_registry=None
I0420 09:52:14.932866 138700832827200 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e240a19a810>` 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`.
I0420 09:52:14.932914 138700832827200 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e2409ef2750>` 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`.
I0420 09:52:14.932949 138700832827200 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 0x7e240a19a810>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e240a19a810>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e2409ef2750>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e2409ef2750>}).
I0420 09:52:14.933286 138700832827200 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0420 09:52:14.933355 138700832827200 async_checkpointer.py:192] [process=2][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7e10884acfe0> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0420 09:52:16.145671 138700832827200 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533_02_synthetic/checkpoints
I0420 09:52:16.625288 138700832827200 checkpoint_manager.py:929] [process=2][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_20260420_081533/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533_02_synthetic/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7e2409ef51c0>
I0420 09:52:16.625456 138700832827200 checkpointing.py:302] Checkpoint manager created!
I0420 09:52:17.577959 138700832827200 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint
I0420 09:52:17.578097 138700832827200 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint.
fsdp: 32

I0420 09:52:19.342800 138700832827200 nnx_decoders.py:465] nnx_decoders/carry Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0420 09:52:19.342896 138700832827200 nnx_decoders.py:465] nnx_decoders/carry Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0420 09:52:19.349223 138700832827200 nnx_decoders.py:465] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0420 09:52:19.349278 138700832827200 nnx_decoders.py:465] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0420 09:52:19.365882 138700832827200 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0420 09:52:19.365942 138700832827200 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0420 09:52:19.381668 138700832827200 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0420 09:52:19.381725 138700832827200 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0420 09:52:19.405617 138700832827200 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0420 09:52:19.405684 138700832827200 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0420 09:52:19.421633 138700832827200 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0420 09:52:19.421694 138700832827200 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0420 09:52:19.437563 138700832827200 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0420 09:52:19.437627 138700832827200 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0420 09:52:19.467498 138700832827200 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0420 09:52:19.467569 138700832827200 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0420 09:52:19.487425 138700832827200 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0420 09:52:19.487495 138700832827200 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0420 09:52:30.980298 138700832827200 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.
I0420 09:52:30.982755 138700832827200 metric_logger.py:301] number parameters: 1.104 billion
I0420 09:52:42.067166 138700832827200 checkpointing.py:794] Waiting for step 0 to finish before checkpoint...
I0420 09:52:42.219547 138700832827200 checkpointing.py:798] Waited 0.15237045288085938 seconds for step 0 to finish before starting checkpointing.
I0420 09:52:42.223213 138700832827200 checkpoint_manager.py:2009] [process=2][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0420 09:52:42.224921 138700832827200 checkpoint_manager.py:1512] [process=2] Saving checkpoint at step 0
I0420 09:52:42.226323 138700832827200 event_tracking.py:70] [process=2] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533_02_synthetic/checkpoints/0.
I0420 09:52:42.943782 138700832827200 signaling_client.py:364] Using JaxDistributedSignalingClient
I0420 09:52:42.944804 138700832827200 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array.
I0420 09:52:42.944861 138700832827200 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
I0420 09:52:43.225555 138700832827200 base_pytree_checkpoint_handler.py:154] [process=2][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.282534s
I0420 09:52:43.225735 138700832827200 base_pytree_checkpoint_handler.py:130] [process=2] /jax/orbax/write/blocking_gbytes_per_sec: 5.288 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.29171228408813477 s) (per-host)
I0420 09:52:43.225787 138700832827200 base_pytree_checkpoint_handler.py:768] [process=2][thread=MainThread] Initiated Pytree async_save. Time taken: 0.291775s (batch_requests_ready=0.003226s, total_serialization_initiated=0.288478s, others=0.000071s)
I0420 09:52:43.225888 138700832827200 composite_checkpoint_handler.py:715] [process=2][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.296364s (all_items=0.000018s, per_item={'items': '0.00001836'}, temp_paths=0.296346)
I0420 09:52:43.226711 138700832827200 event_tracking.py:125] [process=2] [async] Finished blocking save in 1.00 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533_02_synthetic/checkpoints/0.
I0420 09:52:43.227023 138574298175232 async_checkpointer.py:76] [process=2][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-20 10:12:43.226980
I0420 09:52:43.232725 138700832827200 checkpoint_manager.py:1560] [process=2][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0420 09:52:43.233073 138573181654784 async_checkpointer.py:280] [process=2][thread=save_finalize] Waiting for background save thread=async_save.
I0420 09:52:43.233214 138700832827200 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533_02_synthetic/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776678762.2231948, 'wait_for_prev_duration_secs': 6.365776062011719e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776678762.224959, 'checkpointer_blocking_duration_secs': 1.0022437572479248, 'get_old_steps_start_time': 1776678763.2272294, 'get_old_steps_duration_secs': 2.9802322387695312e-05, 'checkpoint_manager_blocking_start_time': 1776678762.2199202, 'checkpoint_manager_blocking_duration_secs': 1.0132558345794678}
I0420 09:52:43.233382 138700832827200 checkpointing.py:409] Started an asynchronous checkpoint save for step 0
I0420 09:52:43.233454 138700832827200 max_utils.py:750] 
Memstats: After params initialized:
I0420 09:52:43.233505 138700832827200 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_8(process=2,(0,2,0,0))
I0420 09:52:43.233536 138700832827200 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_9(process=2,(1,2,0,0))
I0420 09:52:43.233562 138700832827200 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_12(process=2,(0,3,0,0))
I0420 09:52:43.233586 138700832827200 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_13(process=2,(1,3,0,0))
I0420 09:52:43.551476 138700832827200 metric_logger.py:196] completed step: 0, seconds: 11.083, TFLOP/s/device: 1.226, Tokens/s/device: 184.783, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52786.469
I0420 09:52:43.716186 138700832827200 metric_logger.py:196] completed step: 1, seconds: 1.482, TFLOP/s/device: 9.165, Tokens/s/device: 1381.471, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52786.469
I0420 09:52:44.127765 138700832827200 metric_logger.py:196] completed step: 2, seconds: 0.018, TFLOP/s/device: 735.712, Tokens/s/device: 110894.520, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28632.133
I0420 09:52:44.275537 138700832827200 metric_logger.py:196] completed step: 3, seconds: 0.401, TFLOP/s/device: 33.844, Tokens/s/device: 5101.316, total_weights: 65536, loss: 9.732, lm_loss: 9.732, perplexity: 16855.789
I0420 09:52:44.571420 138700832827200 metric_logger.py:196] completed step: 4, seconds: 0.164, TFLOP/s/device: 82.737, Tokens/s/device: 12470.999, total_weights: 65536, loss: 9.274, lm_loss: 9.274, perplexity: 10661.594
I0420 09:52:44.578735 138700832827200 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.233, Tokens/s/device: 13902.371, total_weights: 65536, loss: 8.888, lm_loss: 8.888, perplexity: 7245.978
I0420 09:52:51.227359    2726 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0420 09:52:54.226375 138573227489024 array_metadata_store.py:203] [process=2][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533_02_synthetic/checkpoints/0/items/array_metadatas/process_2
I0420 09:53:07.475630 138700832827200 metric_logger.py:196] completed step: 6, seconds: 0.297, TFLOP/s/device: 45.811, Tokens/s/device: 6905.179, total_weights: 65536, loss: 8.589, lm_loss: 8.589, perplexity: 5371.156
I0420 09:53:07.623242 138700832827200 metric_logger.py:196] completed step: 7, seconds: 22.751, TFLOP/s/device: 0.597, Tokens/s/device: 90.019, total_weights: 65536, loss: 8.380, lm_loss: 8.380, perplexity: 4360.465
I0420 09:53:07.770769 138700832827200 metric_logger.py:196] completed step: 8, seconds: 0.153, TFLOP/s/device: 88.815, Tokens/s/device: 13387.196, total_weights: 65536, loss: 8.251, lm_loss: 8.251, perplexity: 3831.256
I0420 09:53:07.919084 138700832827200 checkpointing.py:794] Waiting for step 9 to finish before checkpoint...
I0420 09:53:07.919759 138700832827200 checkpointing.py:798] Waited 0.0006892681121826172 seconds for step 9 to finish before starting checkpointing.
I0420 09:53:07.921751 138700832827200 checkpoint_manager.py:2020] [process=2][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0420 09:53:25.301252 138574298175232 base_pytree_checkpoint_handler.py:130] [process=2] /jax/orbax/write/gbytes_per_sec: 37.283 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.36719083786011 s) (per-host)
I0420 09:53:25.301374 138574298175232 async_checkpointer.py:90] [process=2][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.074209s.
I0420 09:53:32.807810 138574298175232 async_checkpointer.py:160] [process=2][thread=async_save] Background save thread done. Time taken: 49.580628s.
I0420 09:53:32.808120 138573181654784 async_checkpointer.py:288] [process=2][thread=save_finalize] Done with waiting for background save thread=async_save.
I0420 09:53:32.808275 138573181654784 async_checkpointer.py:298] [process=2][thread=save_finalize] No errors found in background save thread=async_save.
I0420 09:53:32.808327 138573181654784 checkpoint_manager.py:2137] [process=2][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0420 09:53:32.810737 138573181654784 checkpoint_manager.py:2146] [process=2][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0420 09:53:32.810911 138700832827200 checkpoint_manager.py:2032] [process=2][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0420 09:53:32.811056 138700832827200 checkpoint_manager.py:1452] Waiting for previous save to complete took 24.889289 seconds. If this number is high, consider checkpointing less frequently.
I0420 09:53:32.813883 138700832827200 checkpoint_manager.py:1512] [process=2] Saving checkpoint at step 9
I0420 09:53:32.816085 138700832827200 event_tracking.py:70] [process=2] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533_02_synthetic/checkpoints/9.
I0420 09:53:33.158181 138700832827200 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array.
I0420 09:53:33.158281 138700832827200 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
I0420 09:53:33.192060 138700832827200 base_pytree_checkpoint_handler.py:154] [process=2][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.035563s
I0420 09:53:33.192221 138700832827200 base_pytree_checkpoint_handler.py:130] [process=2] /jax/orbax/write/blocking_gbytes_per_sec: 36.123 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04270339012145996 s) (per-host)
I0420 09:53:33.192281 138700832827200 base_pytree_checkpoint_handler.py:768] [process=2][thread=MainThread] Initiated Pytree async_save. Time taken: 0.042773s (batch_requests_ready=0.002835s, total_serialization_initiated=0.039860s, others=0.000078s)
I0420 09:53:33.192387 138700832827200 composite_checkpoint_handler.py:715] [process=2][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.046979s (all_items=0.000017s, per_item={'items': '0.00001669'}, temp_paths=0.046963)
I0420 09:53:33.193124 138700832827200 event_tracking.py:125] [process=2] [async] Finished blocking save in 0.38 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533_02_synthetic/checkpoints/9.
I0420 09:53:33.193407 138573181654784 async_checkpointer.py:76] [process=2][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-20 10:13:33.193375
I0420 09:53:33.195268 138700832827200 checkpoint_manager.py:1560] [process=2][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0420 09:53:33.195474 138568214304512 async_checkpointer.py:280] [process=2][thread=save_finalize] Waiting for background save thread=async_save.
I0420 09:53:33.195575 138700832827200 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533_02_synthetic/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776678787.9217203, 'wait_for_prev_duration_secs': 24.889288663864136, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776678812.8139238, 'checkpointer_blocking_duration_secs': 0.37962794303894043, 'get_old_steps_start_time': 1776678813.1935751, 'get_old_steps_duration_secs': 2.956390380859375e-05, 'checkpoint_manager_blocking_start_time': 1776678787.919985, 'checkpoint_manager_blocking_duration_secs': 25.27555537223816}
I0420 09:53:33.195729 138700832827200 checkpointing.py:409] Started an asynchronous checkpoint save for step 9
I0420 09:53:33.195774 138700832827200 checkpoint_manager.py:2020] [process=2][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0420 09:53:38.356670 138573227489024 array_metadata_store.py:203] [process=2][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533_02_synthetic/checkpoints/9/items/array_metadatas/process_2
I0420 09:54:15.672683 138573181654784 base_pytree_checkpoint_handler.py:130] [process=2] /jax/orbax/write/gbytes_per_sec: 37.147 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.52313280105591 s) (per-host)
I0420 09:54:15.672796 138573181654784 async_checkpointer.py:90] [process=2][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.479272s.
I0420 09:54:22.499201 138573181654784 async_checkpointer.py:160] [process=2][thread=async_save] Background save thread done. Time taken: 49.305651s.
I0420 09:54:22.499430 138568214304512 async_checkpointer.py:288] [process=2][thread=save_finalize] Done with waiting for background save thread=async_save.
I0420 09:54:22.499487 138568214304512 async_checkpointer.py:298] [process=2][thread=save_finalize] No errors found in background save thread=async_save.
I0420 09:54:22.499533 138568214304512 checkpoint_manager.py:2137] [process=2][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0420 09:54:22.502373 138568214304512 checkpoint_manager.py:2146] [process=2][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0420 09:54:22.502552 138700832827200 checkpoint_manager.py:2032] [process=2][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9.
I0420 09:54:22.502719 138700832827200 checkpoint_manager.py:2009] [process=2][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0420 09:54:22.503611 138700832827200 metric_logger.py:196] completed step: 9, seconds: 0.148, TFLOP/s/device: 92.017, Tokens/s/device: 13869.795, 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: Mon Apr 20 09:54:31 UTC 2026
EXIT_CODE=0