2026-04-20 15:54:14.308607: 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 15:54:14.430254 126459778198656 max_utils.py:238] Skipping jax distributed system due to skip_jax_distributed_system=True flag. I0420 15:54:39.316176 126459778198656 max_utils.py:800] System Information: Jax Version: 0.9.2 I0420 15:54:39.316297 126459778198656 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0420 15:54:39.316332 126459778198656 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 15:54:39.316358 126459778198656 train_utils.py:365] WARNING: 'dataset_path' might be pointing your local file system I0420 15:54:39.316381 126459778198656 train_utils.py:378] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0420 15:54:39.316469 126459778198656 train.py:806] [DECOUPLED NO-OP] skipping cloud diagnostics wrapper. I0420 15:54:39.842596 126459778198656 maxtext_utils.py:1718] Num_devices: 8, shape (1, 1, 1, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0420 15:54:40.289562 126459778198656 checkpointing.py:688] Setting up checkpoint logger... I0420 15:54:40.289675 126459778198656 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0420 15:54:40.289712 126459778198656 pytree_checkpoint_handler.py:577] save_device_host_concurrent_bytes=None I0420 15:54:40.289878 126459778198656 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 0x73031fdfd910>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0420 15:54:42.671912 126459778198656 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0420 15:54:42.672122 126459778198656 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 0x72fe20f67d40>}, handler_registry=None I0420 15:54:42.672342 126459778198656 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x72fe20f67d40>` 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 15:54:42.672382 126459778198656 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x72fca357a780>` 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 15:54:42.672410 126459778198656 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 0x72fe20f67d40>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x72fe20f67d40>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x72fca357a780>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x72fca357a780>}). I0420 15:54:42.672689 126459778198656 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.28 I0420 15:54:42.672741 126459778198656 async_checkpointer.py:177] [process=0][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>.<lambda> at 0x72fca43aede0> timeout: 600 secs and primary_host=0 for async checkpoint writes I0420 15:54:42.797940 126459778198656 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_06_grad_accum/checkpoints I0420 15:54:42.798205 126459778198656 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_06_grad_accum/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x72fca357bfb0> I0420 15:54:42.798287 126459778198656 checkpointing.py:302] Checkpoint manager created! I0420 15:54:43.697369 126459778198656 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0420 15:54:43.697479 126459778198656 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. W0420 15:54:43.810397 1139912 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 15:54:43.985401 126459778198656 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[2048]............................................... Unknown. I0420 15:54:43.985489 126459778198656 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[2048]............................................... (None,). I0420 15:54:43.998743 126459778198656 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[2048,16,7168]....................................... Unknown. I0420 15:54:43.998794 126459778198656 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[2048,16,7168]....................................... ('fsdp', None, None). I0420 15:54:44.025060 126459778198656 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[7168,16,2048]....................................... Unknown. I0420 15:54:44.025118 126459778198656 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[7168,16,2048]....................................... (None, None, 'fsdp'). I0420 15:54:44.038261 126459778198656 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[2048,16]............................................ Unknown. I0420 15:54:44.038307 126459778198656 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[2048,16]............................................ (None, None). I0420 15:54:44.064463 126459778198656 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[2048,16,16,128]..................................... Unknown. I0420 15:54:44.064523 126459778198656 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[2048,16,16,128]..................................... ('fsdp', None, None, None). I0420 15:54:44.077621 126459778198656 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[16,16,128,2048]..................................... Unknown. I0420 15:54:44.077669 126459778198656 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[16,16,128,2048]..................................... (None, None, None, 'fsdp'). I0420 15:54:44.116792 126459778198656 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[2048,32000]......................................... Unknown. I0420 15:54:44.116855 126459778198656 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[2048,32000]......................................... ('fsdp', None). I0420 15:54:44.129952 126459778198656 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[32000,2048]......................................... Unknown. I0420 15:54:44.130000 126459778198656 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[32000,2048]......................................... (None, 'fsdp'). I0420 15:54:44.325259 126459778198656 nnx_decoders.py:465] nnx_decoders/carry Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0420 15:54:44.325406 126459778198656 nnx_decoders.py:465] nnx_decoders/carry Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0420 15:54:44.331718 126459778198656 nnx_decoders.py:465] Unknown Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0420 15:54:44.331826 126459778198656 nnx_decoders.py:465] Unknown Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0420 15:54:44.346554 126459778198656 attentions.py:1088] attentions/inputs_q Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0420 15:54:44.346688 126459778198656 attentions.py:1088] attentions/inputs_q Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0420 15:54:44.360657 126459778198656 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0420 15:54:44.360785 126459778198656 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0420 15:54:44.388426 126459778198656 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 15:54:44.388579 126459778198656 attentions.py:1154] attentions/query Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0420 15:54:44.402726 126459778198656 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 15:54:44.402859 126459778198656 attentions.py:1155] attentions/key Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0420 15:54:44.416849 126459778198656 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 15:54:44.416986 126459778198656 attentions.py:1156] attentions/value Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0420 15:54:44.442336 126459778198656 attentions.py:1197] attentions/out Logical: bfloat16[8,2048,16,128]..................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0420 15:54:44.442481 126459778198656 attentions.py:1197] attentions/out Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0420 15:54:44.461644 126459778198656 linears.py:525] linears/x Logical: bfloat16[8,2048,7168]....................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0420 15:54:44.461723 126459778198656 linears.py:525] linears/x Physical: bfloat16[8,2048,7168]....................................... ('fsdp', None, None). I0420 15:54:53.014432 126459778198656 max_utils.py:791] Total memory size: 4.5 GB, Output size: 1.5 GB, Temp size: 2.9 GB, Argument size: 1.5 GB, Host temp size: 0.0 GB. I0420 15:54:53.015451 126459778198656 max_utils.py:194] tensorboardX not available; using no-op SummaryWriter. I0420 15:54:53.017152 126459778198656 metric_logger.py:301] number parameters: 1.104 billion W0420 15:54:54.274647 1139912 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0420 15:54:54.400040 126459778198656 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0420 15:54:54.818536 126459778198656 checkpointing.py:798] Waited 0.4184746742248535 seconds for step 0 to finish before starting checkpointing. I0420 15:54:54.819082 126459778198656 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0420 15:54:54.819259 126459778198656 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 0 I0420 15:54:54.819718 126459778198656 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_06_grad_accum/checkpoints/0. I0420 15:54:54.908417 126459778198656 signaling_client.py:373] Using ThreadSafeKeyValueSignalingClient I0420 15:54:55.002222 126459778198656 jax_array_handlers.py:347] Scheduling D2H of 69 prioritized jax.Array. I0420 15:54:55.002323 126459778198656 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 15:54:55.009256 126352130836032 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_06_grad_accum/checkpoints/0 I0420 15:54:55.708330 126352120350272 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_06_grad_accum/checkpoints/0/items I0420 15:54:55.854861 126352080504384 checkpoint.py:188] Wrote Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776700495617168079, 'commit_timestamp_nsecs': None, 'custom_metadata': {}}, json={"item_handlers": null, "metrics": {}, "performance_metrics": {}, "init_timestamp_nsecs": 1776700495617168079, "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_06_grad_accum/checkpoints/0/_CHECKPOINT_METADATA I0420 15:54:56.301261 1142276 google_auth_provider.cc:149] Using credentials at ~/.config/gcloud/application_default_credentials.json I0420 15:54:56.301326 1142276 google_auth_provider.cc:156] Using OAuth2 AuthProvider I0420 15:54:56.953457 126459778198656 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 1.952681s I0420 15:54:56.961810 126459778198656 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 6.015 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 2 seconds) (per-host) I0420 15:54:56.962124 126459778198656 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 2.052001s (batch_requests_ready=0.082684s, total_serialization_initiated=1.960879s, others=0.008438s) I0420 15:54:56.962253 126459778198656 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 2.053287s (all_items=0.000025s, per_item={'items': '0.00002456'}, temp_paths=2.053262) I0420 15:54:56.964056 126352141321792 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0420 15:54:56.964166 126459778198656 async_checkpointer.py:561] Finished blocking save. Time taken: 2.144866s. 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_06_grad_accum/checkpoints/0. I0420 15:54:56.964370 126459778198656 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0420 15:54:56.964556 126352007104064 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0420 15:54:56.964657 126459778198656 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_06_grad_accum/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776700494.8190668, 'wait_for_prev_duration_secs': 4.315376281738281e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776700494.81928, 'checkpointer_blocking_duration_secs': 2.145000696182251, 'get_old_steps_start_time': 1776700496.9643013, 'get_old_steps_duration_secs': 2.9802322387695312e-05, 'checkpoint_manager_blocking_start_time': 1776700494.8189373, 'checkpoint_manager_blocking_duration_secs': 2.1456916332244873} I0420 15:54:56.964781 126459778198656 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0420 15:54:56.964836 126459778198656 max_utils.py:750] Memstats: After params initialized: I0420 15:54:56.964896 126459778198656 max_utils.py:756] Using (GB) 1.6 / 31.25 (5.120000%) on TPU_0(process=0,(0,0,0,0)) I0420 15:54:56.964924 126459778198656 max_utils.py:756] Using (GB) 1.6 / 31.25 (5.120000%) on TPU_1(process=0,(1,0,0,0)) I0420 15:54:56.964947 126459778198656 max_utils.py:756] Using (GB) 1.6 / 31.25 (5.120000%) on TPU_2(process=0,(0,1,0,0)) I0420 15:54:56.964972 126459778198656 max_utils.py:756] Using (GB) 1.6 / 31.25 (5.120000%) on TPU_3(process=0,(1,1,0,0)) I0420 15:54:56.964992 126459778198656 max_utils.py:756] Using (GB) 1.6 / 31.25 (5.120000%) on TPU_4(process=0,(0,2,0,0)) I0420 15:54:56.965011 126459778198656 max_utils.py:756] Using (GB) 1.6 / 31.25 (5.120000%) on TPU_5(process=0,(1,2,0,0)) I0420 15:54:56.965029 126459778198656 max_utils.py:756] Using (GB) 1.6 / 31.25 (5.120000%) on TPU_6(process=0,(0,3,0,0)) I0420 15:54:56.965065 126459778198656 max_utils.py:756] Using (GB) 1.6 / 31.25 (5.120000%) on TPU_7(process=0,(1,3,0,0)) I0420 15:54:57.448429 126459778198656 metric_logger.py:196] completed step: 0, seconds: 1.381, TFLOP/s/device: 39.349, Tokens/s/device: 5931.126, total_weights: 65536, loss: 10.880, lm_loss: 10.880, perplexity: 53086.324 I0420 15:54:57.449487 126459778198656 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_06_grad_accum/tensorboard/' I0420 15:54:57.762879 126352099378752 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_06_grad_accum/checkpoints/0/items/array_metadatas/process_0 I0420 15:54:57.863321 126459778198656 metric_logger.py:196] completed step: 1, seconds: 3.044, TFLOP/s/device: 17.855, Tokens/s/device: 2691.267, total_weights: 65536, loss: 10.880, lm_loss: 10.880, perplexity: 53086.324 I0420 15:54:58.296148 126459778198656 metric_logger.py:196] completed step: 2, seconds: 0.019, TFLOP/s/device: 2807.403, Tokens/s/device: 423162.353, total_weights: 65536, loss: 10.270, lm_loss: 10.270, perplexity: 28842.992 I0420 15:54:58.731667 126459778198656 metric_logger.py:196] completed step: 3, seconds: 0.427, TFLOP/s/device: 127.282, Tokens/s/device: 19185.371, total_weights: 65536, loss: 9.741, lm_loss: 9.741, perplexity: 16998.510 I0420 15:55:36.492144 126352028075584 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 39.529496s (commit=39.073059s, array_metadata_write=0.456437s) I0420 15:55:36.493636 126352141321792 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 303.890 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 41 seconds) (per-host) I0420 15:55:36.493768 126352141321792 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 39.529554s. I0420 15:55:36.660907 126459778198656 metric_logger.py:196] completed step: 4, seconds: 0.433, TFLOP/s/device: 125.447, Tokens/s/device: 18908.688, total_weights: 65536, loss: 9.284, lm_loss: 9.284, perplexity: 10759.190 I0420 15:55:36.671859 126459778198656 metric_logger.py:196] completed step: 5, seconds: 0.432, TFLOP/s/device: 125.665, Tokens/s/device: 18941.522, total_weights: 65536, loss: 8.897, lm_loss: 8.897, perplexity: 7313.255 I0420 15:55:36.786192 126352141321792 checkpoint.py:228] Read Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776700495617168079, '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_06_grad_accum/checkpoints/0/_CHECKPOINT_METADATA I0420 15:55:36.971942 126352141321792 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 15:55:37.092138 126459778198656 metric_logger.py:196] completed step: 6, seconds: 37.914, TFLOP/s/device: 1.433, Tokens/s/device: 216.070, total_weights: 65536, loss: 8.598, lm_loss: 8.598, perplexity: 5421.259 I0420 15:55:37.169009 126352080504384 checkpoint.py:247] Updated Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776700495617168079, '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_06_grad_accum/checkpoints/0/_CHECKPOINT_METADATA I0420 15:55:37.406276 126352141321792 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389). I0420 15:55:37.406480 126352141321792 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.574366s. 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_06_grad_accum/checkpoints/0/items I0420 15:55:37.407266 126352141321792 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_06_grad_accum/checkpoints/0/items I0420 15:55:37.520064 126459778198656 metric_logger.py:196] completed step: 7, seconds: 0.007, TFLOP/s/device: 7269.732, Tokens/s/device: 1095773.141, total_weights: 65536, loss: 8.390, lm_loss: 8.390, perplexity: 4402.202 I0420 15:55:37.637000 126352141321792 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_06_grad_accum/checkpoints/0 I0420 15:55:37.941328 126459778198656 metric_logger.py:196] completed step: 8, seconds: 0.422, TFLOP/s/device: 128.813, Tokens/s/device: 19416.141, total_weights: 65536, loss: 8.261, lm_loss: 8.261, perplexity: 3868.122 I0420 15:55:38.309224 126352141321792 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_06_grad_accum/checkpoints/0`. I0420 15:55:38.309957 126352141321792 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 43.490665s. directory=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_06_grad_accum/checkpoints/0 I0420 15:55:38.310034 126352141321792 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 41.345823s. I0420 15:55:38.310268 126352007104064 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0420 15:55:38.310398 126352007104064 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0420 15:55:38.310457 126352007104064 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0420 15:55:38.310501 126352007104064 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0420 15:55:38.365353 126459778198656 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0420 15:55:38.366684 126459778198656 checkpointing.py:798] Waited 0.0013396739959716797 seconds for step 9 to finish before starting checkpointing. I0420 15:55:38.366936 126459778198656 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0420 15:55:38.367113 126459778198656 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 9 I0420 15:55:38.367403 126459778198656 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_06_grad_accum/checkpoints/9. I0420 15:55:38.528362 126352007104064 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_06_grad_accum/checkpoints/9 I0420 15:55:38.539390 126459778198656 jax_array_handlers.py:347] Scheduling D2H of 69 prioritized jax.Array. I0420 15:55:38.539555 126459778198656 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 15:55:39.168541 126459778198656 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.630231s I0420 15:55:39.169083 126459778198656 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 17.187 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 718 milliseconds) (per-host) I0420 15:55:39.169135 126459778198656 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 0.718147s (batch_requests_ready=0.079784s, total_serialization_initiated=0.637934s, others=0.000429s) I0420 15:55:39.169202 126459778198656 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.718708s (all_items=0.000017s, per_item={'items': '0.00001717'}, temp_paths=0.718691) I0420 15:55:39.170416 126352038561344 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0420 15:55:39.170516 126459778198656 async_checkpointer.py:561] Finished blocking save. Time taken: 0.803363s. 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_06_grad_accum/checkpoints/9. I0420 15:55:39.170698 126459778198656 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0420 15:55:39.170989 126352017589824 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0420 15:55:39.171134 126459778198656 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_06_grad_accum/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776700538.3669033, 'wait_for_prev_duration_secs': 5.8650970458984375e-05, 'time_between_consecutive_saves_sec': 0.056386470794677734, 'checkpointer_blocking_start_time': 1776700538.3671346, 'checkpointer_blocking_duration_secs': 0.803480863571167, 'get_old_steps_start_time': 1776700539.1706326, 'get_old_steps_duration_secs': 2.9325485229492188e-05, 'checkpoint_manager_blocking_start_time': 1776700538.3668733, 'checkpoint_manager_blocking_duration_secs': 0.8042330741882324} I0420 15:55:39.171316 126459778198656 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0420 15:55:39.171352 126459778198656 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0420 15:55:39.263435 126352028075584 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_06_grad_accum/checkpoints/9/items I0420 15:55:40.492066 126352059532864 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_06_grad_accum/checkpoints/9/items/array_metadatas/process_0 I0420 15:56:21.584932 126352049047104 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 41.878087s (commit=41.456078s, array_metadata_write=0.422009s) I0420 15:56:21.586168 126352038561344 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 292.958 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 43 seconds) (per-host) I0420 15:56:21.586286 126352038561344 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.415714s. I0420 15:56:22.059553 126352038561344 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 15:56:22.449993 126352038561344 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389). I0420 15:56:22.450668 126352038561344 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.553899s. 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_06_grad_accum/checkpoints/9/items I0420 15:56:22.451492 126352038561344 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_06_grad_accum/checkpoints/9/items I0420 15:56:22.678473 126352038561344 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_06_grad_accum/checkpoints/9 I0420 15:56:23.334294 126352038561344 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_06_grad_accum/checkpoints/9`. I0420 15:56:23.335024 126352038561344 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 44.967873s. directory=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_06_grad_accum/checkpoints/9 I0420 15:56:23.335119 126352038561344 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 44.164554s. I0420 15:56:23.335345 126352017589824 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0420 15:56:23.335470 126352017589824 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0420 15:56:23.335557 126352017589824 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0420 15:56:23.335606 126352017589824 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0420 15:56:23.335816 126459778198656 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 15:56:23.335989 126459778198656 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0420 15:56:23.336831 126459778198656 metric_logger.py:196] completed step: 9, seconds: 0.428, TFLOP/s/device: 127.130, Tokens/s/device: 19162.483, total_weights: 65536, loss: 8.185, lm_loss: 8.185, perplexity: 3585.401 Per train step: Total TFLOPs: 54.35 split as 93.93% learnable weight flops and 6.07% attention flops