MaxView

2026-04-20 15:43:17.825378: 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 15:43:17.943173 127416381246592 max_utils.py:238] Skipping jax distributed system due to skip_jax_distributed_system=True flag.
I0420 15:44:13.203482 127416381246592 max_utils.py:800] System Information: Jax Version: 0.9.2
I0420 15:44:13.203607 127416381246592 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0420 15:44:13.203644 127416381246592 max_utils.py:802] System Information: Jax Backend: PJRT C API
TFRT TPU v6 lite
Built on Apr 6 2026 20:48:10 (1775533690) cl/895581894
I0420 15:44:13.203670 127416381246592 train_utils.py:365] WARNING: 'dataset_path' might be pointing your local file system
I0420 15:44:13.203693 127416381246592 train_utils.py:378] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0420 15:44:13.203788 127416381246592 train.py:806] [DECOUPLED NO-OP] skipping cloud diagnostics wrapper.
I0420 15:44:13.716036 127416381246592 maxtext_utils.py:1718] Num_devices: 8, shape (1, 1, 1, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0420 15:44:14.185053 127416381246592 checkpointing.py:688] Setting up checkpoint logger...
I0420 15:44:14.185155 127416381246592 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True
I0420 15:44:14.185194 127416381246592 pytree_checkpoint_handler.py:577] save_device_host_concurrent_bytes=None
I0420 15:44:14.185368 127416381246592 base_pytree_checkpoint_handler.py:411] 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 0x73e1d93f8f20>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0420 15:44:16.668138 127416381246592 checkpointing.py:266] Enabling policy for fixed interval checkpointing.
I0420 15:44:16.668338 127416381246592 checkpoint_manager.py:702] [process=0][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x73dcd473ec00>}, handler_registry=None
I0420 15:44:16.668565 127416381246592 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x73dcd473ec00>` 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 15:44:16.668615 127416381246592 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x73dcdaf92000>` 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 15:44:16.668645 127416381246592 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 0x73dcd473ec00>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x73dcd473ec00>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x73dcdaf92000>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x73dcdaf92000>}).
I0420 15:44:16.668950 127416381246592 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.28
I0420 15:44:16.668999 127416381246592 async_checkpointer.py:177] [process=0][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>.<lambda> at 0x73db5d9aede0> timeout: 600 secs and primary_host=0 for async checkpoint writes
I0420 15:44:16.801074 127416381246592 checkpoint_manager.py:1788] Found 0 checkpoint steps in gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_02_synthetic/checkpoints
I0420 15:44:16.801297 127416381246592 checkpoint_manager.py:921] [process=0][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_hns=False, 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), root_directory=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_02_synthetic/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x73dcdaf92060>
I0420 15:44:16.801375 127416381246592 checkpointing.py:302] Checkpoint manager created!
I0420 15:44:17.219019 127416381246592 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint
I0420 15:44:17.219267 127416381246592 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint.
W0420 15:44:17.332143 1124877 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions.
[DECOUPLED NO-OP] gcs_storage: using stubs.
[DECOUPLED NO-OP] mldiagnostics: using stub.
[DECOUPLED NO-OP] mldiagnostics: using stub.
[DECOUPLED NO-OP] mldiagnostics: using stub.
[DECOUPLED NO-OP] workload_monitor: using stub.
[DECOUPLED NO-OP] vertex_tensorboard: using stub.
fsdp: 8

I0420 15:44:17.538471 127416381246592 nnx_decoders.py:465] nnx_decoders/carry Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0420 15:44:17.538568 127416381246592 nnx_decoders.py:465] nnx_decoders/carry Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None).
I0420 15:44:17.544350 127416381246592 nnx_decoders.py:465] Unknown Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0420 15:44:17.544397 127416381246592 nnx_decoders.py:465] Unknown Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None).
I0420 15:44:17.558650 127416381246592 attentions.py:1088] attentions/inputs_q Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0420 15:44:17.558699 127416381246592 attentions.py:1088] attentions/inputs_q Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None).
I0420 15:44:17.572321 127416381246592 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0420 15:44:17.572368 127416381246592 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None).
I0420 15:44:17.594532 127416381246592 attentions.py:1154] attentions/query Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0420 15:44:17.594591 127416381246592 attentions.py:1154] attentions/query Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None).
I0420 15:44:17.608348 127416381246592 attentions.py:1155] attentions/key Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0420 15:44:17.608400 127416381246592 attentions.py:1155] attentions/key Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None).
I0420 15:44:17.622084 127416381246592 attentions.py:1156] attentions/value Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0420 15:44:17.622133 127416381246592 attentions.py:1156] attentions/value Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None).
I0420 15:44:17.648374 127416381246592 attentions.py:1197] attentions/out Logical: bfloat16[8,2048,16,128]..................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0420 15:44:17.648431 127416381246592 attentions.py:1197] attentions/out Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None).
I0420 15:44:17.665734 127416381246592 linears.py:525] linears/x Logical: bfloat16[8,2048,7168]....................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0420 15:44:17.665784 127416381246592 linears.py:525] linears/x Physical: bfloat16[8,2048,7168]....................................... ('fsdp', None, None).
W0420 15:44:18.041970 1124877 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions.
I0420 15:44:18.150665 127416381246592 max_utils.py:791] Total memory size: 3.6 GB, Output size: 1.5 GB, Temp size: 2.0 GB, Argument size: 1.5 GB, Host temp size: 0.0 GB.
I0420 15:44:18.151259 127416381246592 max_utils.py:194] tensorboardX not available; using no-op SummaryWriter.
I0420 15:44:18.152603 127416381246592 metric_logger.py:301] number parameters: 1.104 billion
W0420 15:44:18.765654 1124877 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions.
I0420 15:44:18.887582 127416381246592 checkpointing.py:794] Waiting for step 0 to finish before checkpoint...
I0420 15:44:19.003879 127416381246592 checkpointing.py:798] Waited 0.11628460884094238 seconds for step 0 to finish before starting checkpointing.
I0420 15:44:19.004477 127416381246592 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0420 15:44:19.004658 127416381246592 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 0
I0420 15:44:19.005234 127416381246592 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_02_synthetic/checkpoints/0.
I0420 15:44:19.098862 127416381246592 signaling_client.py:373] Using ThreadSafeKeyValueSignalingClient
I0420 15:44:19.189579 127308845286976 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_02_synthetic/checkpoints/0
I0420 15:44:19.207286 127416381246592 jax_array_handlers.py:347] Scheduling D2H of 69 prioritized jax.Array.
I0420 15:44:19.207379 127416381246592 replica_slices.py:410] 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 15:44:19.867951 127308834801216 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_02_synthetic/checkpoints/0/items
I0420 15:44:20.017163 127308803343936 checkpoint.py:188] Wrote Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776699859773555825, 'commit_timestamp_nsecs': None, 'custom_metadata': {}}, json={"item_handlers": null, "metrics": {}, "performance_metrics": {}, "init_timestamp_nsecs": 1776699859773555825, "commit_timestamp_nsecs": null, "custom_metadata": {}} to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_02_synthetic/checkpoints/0/_CHECKPOINT_METADATA
I0420 15:44:20.357905 127416381246592 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 1.151664s
I0420 15:44:20.358396 127416381246592 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 9.813 GiB/s (total gbytes: 12.3 GiB) (time elapsed: a second) (per-host)
I0420 15:44:20.358450 127416381246592 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 1.257740s (batch_requests_ready=0.097981s, total_serialization_initiated=1.159384s, others=0.000375s)
I0420 15:44:20.358517 127416381246592 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.259145s (all_items=0.000029s, per_item={'items': '0.00002885'}, temp_paths=1.259116)
I0420 15:44:20.359317 127308782372416 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started.
I0420 15:44:20.359421 127416381246592 async_checkpointer.py:561] Finished blocking save. Time taken: 1.354720s. Continuing background save to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_02_synthetic/checkpoints/0.
I0420 15:44:20.359627 127416381246592 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0420 15:44:20.359865 127308855772736 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save.
I0420 15:44:20.359978 127416381246592 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_02_synthetic/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776699859.0044634, 'wait_for_prev_duration_secs': 4.1961669921875e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776699859.0046797, 'checkpointer_blocking_duration_secs': 1.354860544204712, 'get_old_steps_start_time': 1776699860.3595605, 'get_old_steps_duration_secs': 2.765655517578125e-05, 'checkpoint_manager_blocking_start_time': 1776699859.0043235, 'checkpoint_manager_blocking_duration_secs': 1.3556275367736816}
I0420 15:44:20.360115 127416381246592 checkpointing.py:409] Started an asynchronous checkpoint save for step 0
I0420 15:44:20.360168 127416381246592 max_utils.py:750] 
Memstats: After params initialized:
I0420 15:44:20.360274 127416381246592 max_utils.py:756] 	Using (GB) 1.6 / 31.25 (5.120000%) on TPU_0(process=0,(0,0,0,0))
I0420 15:44:20.360301 127416381246592 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_1(process=0,(1,0,0,0))
I0420 15:44:20.360322 127416381246592 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_2(process=0,(0,1,0,0))
I0420 15:44:20.360340 127416381246592 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_3(process=0,(1,1,0,0))
I0420 15:44:20.360357 127416381246592 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_4(process=0,(0,2,0,0))
I0420 15:44:20.360373 127416381246592 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_5(process=0,(1,2,0,0))
I0420 15:44:20.360390 127416381246592 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_6(process=0,(0,3,0,0))
I0420 15:44:20.360406 127416381246592 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_7(process=0,(1,3,0,0))
I0420 15:44:20.460702 1127448 google_auth_provider.cc:149] Using credentials at ~/.config/gcloud/application_default_credentials.json
I0420 15:44:20.460768 1127448 google_auth_provider.cc:156] Using OAuth2 AuthProvider
I0420 15:44:20.732410 127416381246592 metric_logger.py:196] completed step: 0, seconds: 0.734, TFLOP/s/device: 18.520, Tokens/s/device: 2791.461, total_weights: 16384, loss: 10.881, lm_loss: 10.881, perplexity: 53156.906
I0420 15:44:20.733542 127416381246592 metric_logger.py:281] To see full metrics 'tensorboard --logdir=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_02_synthetic/tensorboard/'
I0420 15:44:20.845515 127416381246592 metric_logger.py:196] completed step: 1, seconds: 1.841, TFLOP/s/device: 7.381, Tokens/s/device: 1112.507, total_weights: 16384, loss: 10.881, lm_loss: 10.881, perplexity: 53156.906
I0420 15:44:20.964774 127416381246592 metric_logger.py:196] completed step: 2, seconds: 0.018, TFLOP/s/device: 752.291, Tokens/s/device: 113393.500, total_weights: 16384, loss: 9.779, lm_loss: 9.779, perplexity: 17650.354
I0420 15:44:21.082899 127416381246592 metric_logger.py:196] completed step: 3, seconds: 0.106, TFLOP/s/device: 128.344, Tokens/s/device: 19345.393, total_weights: 16384, loss: 8.837, lm_loss: 8.837, perplexity: 6882.615
I0420 15:44:21.239614 127308824315456 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_02_synthetic/checkpoints/0/items/array_metadatas/process_0
I0420 15:44:40.271386 127416381246592 metric_logger.py:196] completed step: 4, seconds: 0.120, TFLOP/s/device: 113.218, Tokens/s/device: 17065.387, total_weights: 16384, loss: 7.961, lm_loss: 7.961, perplexity: 2866.817
I0420 15:44:40.281675 127416381246592 metric_logger.py:196] completed step: 5, seconds: 0.117, TFLOP/s/device: 115.745, Tokens/s/device: 17446.417, total_weights: 16384, loss: 7.226, lm_loss: 7.226, perplexity: 1375.026
I0420 15:44:40.396074 127416381246592 metric_logger.py:196] completed step: 6, seconds: 19.190, TFLOP/s/device: 0.708, Tokens/s/device: 106.724, total_weights: 16384, loss: 6.669, lm_loss: 6.669, perplexity: 787.910
I0420 15:44:40.514584 127416381246592 metric_logger.py:196] completed step: 7, seconds: 0.007, TFLOP/s/device: 1838.583, Tokens/s/device: 277131.258, total_weights: 16384, loss: 6.286, lm_loss: 6.286, perplexity: 536.857
I0420 15:44:40.633338 127416381246592 metric_logger.py:196] completed step: 8, seconds: 0.115, TFLOP/s/device: 118.444, Tokens/s/device: 17853.096, total_weights: 16384, loss: 6.048, lm_loss: 6.048, perplexity: 423.078
I0420 15:44:40.751733 127416381246592 checkpointing.py:794] Waiting for step 9 to finish before checkpoint...
I0420 15:44:40.752835 127416381246592 checkpointing.py:798] Waited 0.0011200904846191406 seconds for step 9 to finish before starting checkpointing.
I0420 15:44:40.753165 127416381246592 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0420 15:44:45.451345 127308792858176 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 24.995995s (commit=24.587260s, array_metadata_write=0.408735s)
I0420 15:44:45.452551 127308782372416 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 479.543 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 26 seconds) (per-host)
I0420 15:44:45.452672 127308782372416 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 25.093199s.
I0420 15:44:45.685726 127308782372416 checkpoint.py:228] Read Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776699859773555825, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} from gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_02_synthetic/checkpoints/0/_CHECKPOINT_METADATA
I0420 15:44:45.853861 127308782372416 array_metadata_store.py:367] [process=0][thread=async_save] Skipped cross-host ArrayMetadata validation because only one process is found: process_index=0.
I0420 15:44:46.084395 127308803343936 checkpoint.py:247] Updated Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776699859773555825, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_02_synthetic/checkpoints/0/_CHECKPOINT_METADATA
I0420 15:44:46.318668 127308782372416 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389).
I0420 15:44:46.318856 127308782372416 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.595056s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_02_synthetic/checkpoints/0/items
I0420 15:44:46.319565 127308782372416 atomicity.py:608] Finalizing gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_02_synthetic/checkpoints/0/items
I0420 15:44:46.575576 127308782372416 atomicity.py:608] Finalizing gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_02_synthetic/checkpoints/0
I0420 15:44:47.262759 127308782372416 atomicity.py:794] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_02_synthetic/checkpoints/0`.
I0420 15:44:47.263423 127308782372416 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 28.258725s. directory=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_02_synthetic/checkpoints/0
I0420 15:44:47.263512 127308782372416 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 26.904042s.
I0420 15:44:47.263686 127308855772736 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save.
I0420 15:44:47.263800 127308855772736 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save.
I0420 15:44:47.263871 127308855772736 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0420 15:44:47.263925 127308855772736 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0420 15:44:47.264028 127416381246592 checkpoint_manager.py:2006] [process=0][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0420 15:44:47.264119 127416381246592 checkpoint_manager.py:1441] Waiting for previous save to complete took 6.510985 seconds. If this number is high, consider checkpointing less frequently.
I0420 15:44:47.265220 127416381246592 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 9
I0420 15:44:47.265471 127416381246592 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_02_synthetic/checkpoints/9.
I0420 15:44:47.445200 127308855772736 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_02_synthetic/checkpoints/9
I0420 15:44:47.458899 127416381246592 jax_array_handlers.py:347] Scheduling D2H of 69 prioritized jax.Array.
I0420 15:44:47.459000 127416381246592 replica_slices.py:410] 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 15:44:48.138986 127308834801216 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_02_synthetic/checkpoints/9/items
I0420 15:44:53.564529 127416381246592 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 6.106654s
I0420 15:44:53.570579 127416381246592 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 1.988 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 6 seconds) (per-host)
I0420 15:44:53.570642 127416381246592 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 6.207570s (batch_requests_ready=0.087484s, total_serialization_initiated=6.114156s, others=0.005930s)
I0420 15:44:53.570722 127416381246592 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 6.208162s (all_items=0.000025s, per_item={'items': '0.00002456'}, temp_paths=6.208137)
I0420 15:44:53.572169 127308855772736 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started.
I0420 15:44:53.572274 127416381246592 async_checkpointer.py:561] Finished blocking save. Time taken: 6.307006s. Continuing background save to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_02_synthetic/checkpoints/9.
I0420 15:44:53.572484 127416381246592 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0420 15:44:53.572658 127308782372416 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save.
I0420 15:44:53.572762 127416381246592 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_02_synthetic/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776699880.753109, 'wait_for_prev_duration_secs': 6.510984659194946, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776699887.2652445, 'checkpointer_blocking_duration_secs': 6.307138204574585, 'get_old_steps_start_time': 1776699893.5724018, 'get_old_steps_duration_secs': 4.315376281738281e-05, 'checkpoint_manager_blocking_start_time': 1776699880.7530327, 'checkpoint_manager_blocking_duration_secs': 12.819701194763184}
I0420 15:44:53.572884 127416381246592 checkpointing.py:409] Started an asynchronous checkpoint save for step 9
I0420 15:44:53.572917 127416381246592 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0420 15:44:54.312247 127308824315456 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_02_synthetic/checkpoints/9/items/array_metadatas/process_0
I0420 15:45:23.181331 127308834801216 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 29.609876s (commit=29.157368s, array_metadata_write=0.452508s)
I0420 15:45:23.182586 127308855772736 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 352.791 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 35 seconds) (per-host)
I0420 15:45:23.182649 127308855772736 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 29.610326s.
I0420 15:45:23.587378 127308855772736 array_metadata_store.py:367] [process=0][thread=async_save] Skipped cross-host ArrayMetadata validation because only one process is found: process_index=0.
I0420 15:45:24.059213 127308855772736 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389).
I0420 15:45:24.059858 127308855772736 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.609636s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_02_synthetic/checkpoints/9/items
I0420 15:45:24.060589 127308855772736 atomicity.py:608] Finalizing gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_02_synthetic/checkpoints/9/items
I0420 15:45:24.289777 127308855772736 atomicity.py:608] Finalizing gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_02_synthetic/checkpoints/9
I0420 15:45:24.949006 127308855772736 atomicity.py:794] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_02_synthetic/checkpoints/9`.
I0420 15:45:24.949673 127308855772736 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 37.684413s. directory=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_02_synthetic/checkpoints/9
I0420 15:45:24.949753 127308855772736 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 31.377437s.
I0420 15:45:24.949949 127308782372416 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save.
I0420 15:45:24.950069 127308782372416 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save.
I0420 15:45:24.950142 127308782372416 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0420 15:45:24.950189 127308782372416 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0420 15:45:24.950324 127416381246592 checkpoint_manager.py:2006] [process=0][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9.
I0420 15:45:24.950520 127416381246592 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0420 15:45:24.951623 127416381246592 metric_logger.py:196] completed step: 9, seconds: 0.119, TFLOP/s/device: 113.926, Tokens/s/device: 17172.132, total_weights: 16384, loss: 5.908, lm_loss: 5.908, perplexity: 367.912
Per train step:
 Total TFLOPs: 13.59 
 split as 93.93% learnable weight flops and 6.07% attention flops