2026-04-20 14:51:28.776394: 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 14:51:28.898190 139788957146240 max_utils.py:238] Skipping jax distributed system due to skip_jax_distributed_system=True flag. I0420 14:52:12.566610 139788957146240 max_utils.py:800] System Information: Jax Version: 0.9.2 I0420 14:52:12.566826 139788957146240 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0420 14:52:12.566874 139788957146240 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 14:52:12.566902 139788957146240 train_utils.py:365] WARNING: 'dataset_path' might be pointing your local file system I0420 14:52:12.567092 139788957146240 train.py:806] [DECOUPLED NO-OP] skipping cloud diagnostics wrapper. I0420 14:52:13.075365 139788957146240 maxtext_utils.py:1718] Num_devices: 8, shape (1, 1, 1, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0420 14:52:13.075553 139788957146240 maxtext_utils.py:1718] Num_devices: 8, shape (1, 1, 1, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0420 14:52:13.075814 139788957146240 checkpointing.py:688] Setting up checkpoint logger... I0420 14:52:13.075857 139788957146240 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0420 14:52:13.075938 139788957146240 pytree_checkpoint_handler.py:577] save_device_host_concurrent_bytes=None I0420 14:52:13.076658 139788957146240 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 0x7f22903f8c50>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0420 14:52:15.437184 139788957146240 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0420 14:52:15.437448 139788957146240 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 0x7f1c159306b0>}, handler_registry=None I0420 14:52:15.437850 139788957146240 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7f1c159306b0>` 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 14:52:15.437898 139788957146240 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7f1c141600e0>` 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 14:52:15.437928 139788957146240 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 0x7f1c159306b0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7f1c159306b0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7f1c141600e0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7f1c141600e0>}). I0420 14:52:15.438255 139788957146240 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.28 I0420 14:52:15.438317 139788957146240 async_checkpointer.py:177] [process=0][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>.<lambda> at 0x7f1c1414efc0> timeout: 600 secs and primary_host=0 for async checkpoint writes I0420 14:52:15.558500 139788957146240 checkpoint_manager.py:1788] Found 0 checkpoint steps in gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/linen_feat_nnx_trainstate_and_training_loop_20260420_142345_10_shardy_true/checkpoints I0420 14:52:15.558774 139788957146240 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/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/linen_feat_nnx_trainstate_and_training_loop_20260420_142345_10_shardy_true/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7f1c1413b4d0> I0420 14:52:15.558882 139788957146240 checkpointing.py:302] Checkpoint manager created! I0420 14:52:15.994406 139788957146240 dataset_info.py:707] Load dataset info from tests/assets/local_datasets/c4_en_dataset_minimal/c4/en/3.1.0 I0420 14:52:15.998340 139788957146240 reader.py:262] Creating a tf.data.Dataset reading 8 files located in folders: tests/assets/local_datasets/c4_en_dataset_minimal/c4/en/3.1.0. I0420 14:52:16.052362 139788957146240 logging_logger.py:49] Constructing tf.data.Dataset __local_c4_builder for split train, from tests/assets/local_datasets/c4_en_dataset_minimal/c4/en/3.1.0 I0420 14:52:16.082637 139788957146240 tokenizer.py:245] Tokenizer path: src/maxtext/assets/tokenizers/tokenizer.llama2 I0420 14:52:16.082706 139788957146240 tokenizer.py:187] Loading sentencepiece tokenizer: src/maxtext/assets/tokenizers/tokenizer.llama2 I0420 14:52:16.704999 139788957146240 nnx_wrappers.py:437] Unknown Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0420 14:52:16.705126 139788957146240 nnx_wrappers.py:437] Unknown Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0420 14:52:16.810967 139788957146240 attentions.py:1088] attentions/inputs_q Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0420 14:52:16.811071 139788957146240 attentions.py:1088] attentions/inputs_q Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0420 14:52:16.826036 139788957146240 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0420 14:52:16.826100 139788957146240 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0420 14:52:16.847818 139788957146240 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 14:52:16.847878 139788957146240 attentions.py:1154] attentions/query Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0420 14:52:16.862864 139788957146240 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 14:52:16.862918 139788957146240 attentions.py:1155] attentions/key Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0420 14:52:16.877771 139788957146240 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 14:52:16.877827 139788957146240 attentions.py:1156] attentions/value Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0420 14:52:16.900373 139788957146240 attentions.py:1197] attentions/out Logical: bfloat16[8,2048,16,128]..................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0420 14:52:16.900436 139788957146240 attentions.py:1197] attentions/out Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0420 14:52:16.919410 139788957146240 linears.py:525] linears/x Logical: bfloat16[8,2048,7168]....................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0420 14:52:16.919465 139788957146240 linears.py:525] linears/x Physical: bfloat16[8,2048,7168]....................................... ('fsdp', None, None). I0420 14:52:17.116107 139788957146240 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0420 14:52:17.116224 139788957146240 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. W0420 14:52:17.168427 1069004 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 14:52:17.566271 139788957146240 maxtext_utils.py:1821] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0420 14:52:17.566382 139788957146240 maxtext_utils.py:1821] params/params/decoder/layers/mlp/wi_0/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0420 14:52:17.566423 139788957146240 maxtext_utils.py:1821] params/params/decoder/layers/mlp/wi_1/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0420 14:52:17.566468 139788957146240 maxtext_utils.py:1821] params/params/decoder/layers/mlp/wo/kernel Shape: float32[7168,16,2048] Logical: P('mlp', 'layers', 'embed') Physical: (None, None, 'fsdp') I0420 14:52:17.566508 139788957146240 maxtext_utils.py:1821] params/params/decoder/layers/post_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0420 14:52:17.566536 139788957146240 maxtext_utils.py:1821] params/params/decoder/layers/pre_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0420 14:52:17.566576 139788957146240 maxtext_utils.py:1821] params/params/decoder/layers/self_attention/key/kernel Shape: float32[2048,16,16,128] Logical: P('embed', 'layers', 'kv_heads', 'kv_head_dim') Physical: ('fsdp', None, None, None) I0420 14:52:17.566616 139788957146240 maxtext_utils.py:1821] params/params/decoder/layers/self_attention/out/kernel Shape: float32[16,16,128,2048] Logical: P('heads', 'layers', 'kv', 'embed') Physical: (None, None, None, 'fsdp') I0420 14:52:17.566644 139788957146240 maxtext_utils.py:1821] params/params/decoder/layers/self_attention/query/kernel Shape: float32[2048,16,16,128] Logical: P('embed', 'layers', 'q_heads', 'kv') Physical: ('fsdp', None, None, None) I0420 14:52:17.566673 139788957146240 maxtext_utils.py:1821] params/params/decoder/layers/self_attention/value/kernel Shape: float32[2048,16,16,128] Logical: P('embed', 'layers', 'kv_heads', 'kv_head_dim') Physical: ('fsdp', None, None, None) I0420 14:52:17.566708 139788957146240 maxtext_utils.py:1821] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', None) I0420 14:52:17.566748 139788957146240 maxtext_utils.py:1821] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0420 14:52:18.005737 139788957146240 train.py:157] train/xent Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length'). I0420 14:52:18.005835 139788957146240 train.py:157] train/xent Physical: float32[8,2048]............................................. ('fsdp', None). I0420 14:52:18.020017 139788957146240 train.py:164] train/z_loss Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length'). I0420 14:52:18.020086 139788957146240 train.py:164] train/z_loss Physical: float32[8,2048]............................................. ('fsdp', None). W0420 14:52:18.317079 1069004 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0420 14:52:18.430107 139788957146240 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 14:52:18.430703 139788957146240 max_utils.py:194] tensorboardX not available; using no-op SummaryWriter. I0420 14:52:18.430866 139788957146240 metric_logger.py:301] number parameters: 1.104 billion W0420 14:52:22.005876 1069004 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0420 14:52:22.138744 139788957146240 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0420 14:52:22.259180 139788957146240 checkpointing.py:798] Waited 0.12041401863098145 seconds for step 0 to finish before starting checkpointing. I0420 14:52:22.259645 139788957146240 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0420 14:52:22.259827 139788957146240 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 0 I0420 14:52:22.260251 139788957146240 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/linen_feat_nnx_trainstate_and_training_loop_20260420_142345_10_shardy_true/checkpoints/0. I0420 14:52:22.334797 139788957146240 signaling_client.py:373] Using ThreadSafeKeyValueSignalingClient I0420 14:52:22.412978 139675742242368 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/linen_feat_nnx_trainstate_and_training_loop_20260420_142345_10_shardy_true/checkpoints/0 I0420 14:52:22.426353 139788957146240 jax_array_handlers.py:347] Scheduling D2H of 39 prioritized jax.Array. I0420 14:52:22.426450 139788957146240 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 14:52:23.216645 139675731756608 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/linen_feat_nnx_trainstate_and_training_loop_20260420_142345_10_shardy_true/checkpoints/0/items I0420 14:52:23.355582 139675683522112 checkpoint.py:188] Wrote Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776696743111564911, 'commit_timestamp_nsecs': None, 'custom_metadata': {}}, json={"item_handlers": null, "metrics": {}, "performance_metrics": {}, "init_timestamp_nsecs": 1776696743111564911, "commit_timestamp_nsecs": null, "custom_metadata": {}} to gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/linen_feat_nnx_trainstate_and_training_loop_20260420_142345_10_shardy_true/checkpoints/0/_CHECKPOINT_METADATA I0420 14:52:23.492408 139788957146240 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 1.066559s I0420 14:52:23.492956 139788957146240 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 10.669 GiB/s (total gbytes: 12.3 GiB) (time elapsed: a second) (per-host) I0420 14:52:23.493013 139788957146240 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 1.156817s (batch_requests_ready=0.086262s, total_serialization_initiated=1.070153s, others=0.000402s) I0420 14:52:23.493107 139788957146240 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.157752s (all_items=0.000020s, per_item={'items': '0.00001979'}, temp_paths=1.157732) I0420 14:52:23.493999 139675662550592 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0420 14:52:23.494147 139788957146240 async_checkpointer.py:561] Finished blocking save. Time taken: 1.234276s. Continuing background save to gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/linen_feat_nnx_trainstate_and_training_loop_20260420_142345_10_shardy_true/checkpoints/0. I0420 14:52:23.494388 139788957146240 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0420 14:52:23.494684 139675752728128 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0420 14:52:23.494828 139788957146240 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/linen_feat_nnx_trainstate_and_training_loop_20260420_142345_10_shardy_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776696742.259632, 'wait_for_prev_duration_secs': 4.1961669921875e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776696742.259849, 'checkpointer_blocking_duration_secs': 1.2344424724578857, 'get_old_steps_start_time': 1776696743.494315, 'get_old_steps_duration_secs': 2.956390380859375e-05, 'checkpoint_manager_blocking_start_time': 1776696742.2595484, 'checkpoint_manager_blocking_duration_secs': 1.2352421283721924} I0420 14:52:23.494978 139788957146240 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0420 14:52:23.495029 139788957146240 max_utils.py:750] Memstats: After params initialized: I0420 14:52:23.495137 139788957146240 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_0(process=0,(0,0,0,0)) I0420 14:52:23.495167 139788957146240 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_1(process=0,(1,0,0,0)) I0420 14:52:23.495188 139788957146240 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_2(process=0,(0,1,0,0)) I0420 14:52:23.495208 139788957146240 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_3(process=0,(1,1,0,0)) I0420 14:52:23.495228 139788957146240 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_4(process=0,(0,2,0,0)) I0420 14:52:23.495246 139788957146240 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_5(process=0,(1,2,0,0)) I0420 14:52:23.495265 139788957146240 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_6(process=0,(0,3,0,0)) I0420 14:52:23.495283 139788957146240 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_7(process=0,(1,3,0,0)) I0420 14:52:23.682063 1071755 google_auth_provider.cc:149] Using credentials at ~/.config/gcloud/application_default_credentials.json I0420 14:52:23.682145 1071755 google_auth_provider.cc:156] Using OAuth2 AuthProvider I0420 14:52:23.904754 139788957146240 metric_logger.py:196] completed step: 0, seconds: 3.707, TFLOP/s/device: 3.665, Tokens/s/device: 552.418, total_weights: 13328, loss: 10.828, lm_loss: 10.828, perplexity: 50404.086 I0420 14:52:23.905722 139788957146240 metric_logger.py:281] To see full metrics 'tensorboard --logdir=gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/linen_feat_nnx_trainstate_and_training_loop_20260420_142345_10_shardy_true/tensorboard/' I0420 14:52:24.020547 139788957146240 metric_logger.py:196] completed step: 1, seconds: 1.764, TFLOP/s/device: 7.703, Tokens/s/device: 1161.111, total_weights: 12332, loss: 10.828, lm_loss: 10.828, perplexity: 50391.758 I0420 14:52:24.138002 139788957146240 metric_logger.py:196] completed step: 2, seconds: 0.010, TFLOP/s/device: 1406.244, Tokens/s/device: 211964.397, total_weights: 15161, loss: 9.823, lm_loss: 9.823, perplexity: 18444.867 I0420 14:52:24.255540 139788957146240 metric_logger.py:196] completed step: 3, seconds: 0.117, TFLOP/s/device: 116.103, Tokens/s/device: 17500.235, total_weights: 13327, loss: 9.405, lm_loss: 9.405, perplexity: 12149.331 I0420 14:52:24.652526 139675742242368 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/linen_feat_nnx_trainstate_and_training_loop_20260420_142345_10_shardy_true/checkpoints/0/items/array_metadatas/process_0 I0420 14:52:43.399538 139788957146240 metric_logger.py:196] completed step: 4, seconds: 0.118, TFLOP/s/device: 115.425, Tokens/s/device: 17398.100, total_weights: 11939, loss: 9.045, lm_loss: 9.045, perplexity: 8471.842 I0420 14:52:43.409315 139788957146240 metric_logger.py:196] completed step: 5, seconds: 0.121, TFLOP/s/device: 112.596, Tokens/s/device: 16971.766, total_weights: 15502, loss: 8.953, lm_loss: 8.953, perplexity: 7728.546 I0420 14:52:43.526148 139788957146240 metric_logger.py:196] completed step: 6, seconds: 19.140, TFLOP/s/device: 0.710, Tokens/s/device: 106.999, total_weights: 13864, loss: 8.775, lm_loss: 8.775, perplexity: 6468.536 I0420 14:52:43.643576 139788957146240 metric_logger.py:196] completed step: 7, seconds: 0.007, TFLOP/s/device: 2044.099, Tokens/s/device: 308108.921, total_weights: 12988, loss: 8.688, lm_loss: 8.688, perplexity: 5928.887 I0420 14:52:43.760838 139788957146240 metric_logger.py:196] completed step: 8, seconds: 0.118, TFLOP/s/device: 115.169, Tokens/s/device: 17359.463, total_weights: 13820, loss: 8.740, lm_loss: 8.740, perplexity: 6250.123 I0420 14:52:43.877628 139788957146240 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0420 14:52:43.878433 139788957146240 checkpointing.py:798] Waited 0.000850677490234375 seconds for step 9 to finish before starting checkpointing. I0420 14:52:43.878715 139788957146240 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0420 14:52:59.593000 139675721270848 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 35.913954s (commit=35.472447s, array_metadata_write=0.441507s) I0420 14:52:59.594333 139675662550592 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 339.169 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 37 seconds) (per-host) I0420 14:52:59.594454 139675662550592 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 36.100245s. I0420 14:52:59.825986 139675662550592 checkpoint.py:228] Read Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776696743111564911, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} from gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/linen_feat_nnx_trainstate_and_training_loop_20260420_142345_10_shardy_true/checkpoints/0/_CHECKPOINT_METADATA I0420 14:53:00.007180 139675662550592 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 14:53:00.220638 139675683522112 checkpoint.py:247] Updated Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776696743111564911, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} to gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/linen_feat_nnx_trainstate_and_training_loop_20260420_142345_10_shardy_true/checkpoints/0/_CHECKPOINT_METADATA I0420 14:53:00.452289 139675662550592 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389). I0420 14:53:00.452898 139675662550592 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.585164s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/linen_feat_nnx_trainstate_and_training_loop_20260420_142345_10_shardy_true/checkpoints/0/items I0420 14:53:00.453656 139675662550592 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/linen_feat_nnx_trainstate_and_training_loop_20260420_142345_10_shardy_true/checkpoints/0/items I0420 14:53:00.691591 139675662550592 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/linen_feat_nnx_trainstate_and_training_loop_20260420_142345_10_shardy_true/checkpoints/0 I0420 14:53:01.385441 139675662550592 atomicity.py:794] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/linen_feat_nnx_trainstate_and_training_loop_20260420_142345_10_shardy_true/checkpoints/0`. I0420 14:53:01.386193 139675662550592 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 39.126332s. directory=gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/linen_feat_nnx_trainstate_and_training_loop_20260420_142345_10_shardy_true/checkpoints/0 I0420 14:53:01.386270 139675662550592 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 37.892064s. I0420 14:53:01.386474 139675752728128 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0420 14:53:01.386595 139675752728128 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0420 14:53:01.386653 139675752728128 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0420 14:53:01.386700 139675752728128 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0420 14:53:01.386871 139788957146240 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 14:53:01.386937 139788957146240 checkpoint_manager.py:1441] Waiting for previous save to complete took 17.508237 seconds. If this number is high, consider checkpointing less frequently. I0420 14:53:01.387669 139788957146240 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 9 I0420 14:53:01.387967 139788957146240 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/linen_feat_nnx_trainstate_and_training_loop_20260420_142345_10_shardy_true/checkpoints/9. I0420 14:53:01.565937 139788957146240 jax_array_handlers.py:347] Scheduling D2H of 39 prioritized jax.Array. I0420 14:53:01.566110 139675752728128 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/linen_feat_nnx_trainstate_and_training_loop_20260420_142345_10_shardy_true/checkpoints/9 I0420 14:53:01.566200 139788957146240 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 14:53:02.299648 139675731756608 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/linen_feat_nnx_trainstate_and_training_loop_20260420_142345_10_shardy_true/checkpoints/9/items I0420 14:53:06.785944 139788957146240 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 5.220850s I0420 14:53:06.790282 139788957146240 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.321 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 5 seconds) (per-host) I0420 14:53:06.790347 139788957146240 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 5.316538s (batch_requests_ready=0.088052s, total_serialization_initiated=5.224290s, others=0.004196s) I0420 14:53:06.790418 139788957146240 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 5.317114s (all_items=0.000017s, per_item={'items': '0.00001693'}, temp_paths=5.317097) I0420 14:53:06.792275 139675612218944 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0420 14:53:06.792383 139788957146240 async_checkpointer.py:561] Finished blocking save. Time taken: 5.404669s. Continuing background save to gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/linen_feat_nnx_trainstate_and_training_loop_20260420_142345_10_shardy_true/checkpoints/9. I0420 14:53:06.792577 139788957146240 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0420 14:53:06.792719 139675662550592 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0420 14:53:06.792792 139788957146240 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/linen_feat_nnx_trainstate_and_training_loop_20260420_142345_10_shardy_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776696763.8786767, 'wait_for_prev_duration_secs': 17.5082368850708, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776696781.3876936, 'checkpointer_blocking_duration_secs': 5.404793739318848, 'get_old_steps_start_time': 1776696786.792507, 'get_old_steps_duration_secs': 3.218650817871094e-05, 'checkpoint_manager_blocking_start_time': 1776696763.8786366, 'checkpoint_manager_blocking_duration_secs': 22.914130210876465} I0420 14:53:06.792900 139788957146240 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0420 14:53:06.792933 139788957146240 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0420 14:53:07.541104 139675742242368 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/linen_feat_nnx_trainstate_and_training_loop_20260420_142345_10_shardy_true/checkpoints/9/items/array_metadatas/process_0 I0420 14:53:48.172497 139675731756608 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 41.381287s (commit=40.929570s, array_metadata_write=0.451717s) I0420 14:53:48.173902 139675612218944 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 270.595 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 46 seconds) (per-host) I0420 14:53:48.174025 139675612218944 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.381595s. I0420 14:53:48.589419 139675612218944 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 14:53:49.037299 139675612218944 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389). I0420 14:53:49.038030 139675612218944 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.581425s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/linen_feat_nnx_trainstate_and_training_loop_20260420_142345_10_shardy_true/checkpoints/9/items I0420 14:53:49.038821 139675612218944 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/linen_feat_nnx_trainstate_and_training_loop_20260420_142345_10_shardy_true/checkpoints/9/items I0420 14:53:49.287095 139675612218944 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/linen_feat_nnx_trainstate_and_training_loop_20260420_142345_10_shardy_true/checkpoints/9 I0420 14:53:49.962591 139675612218944 atomicity.py:794] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/linen_feat_nnx_trainstate_and_training_loop_20260420_142345_10_shardy_true/checkpoints/9`. I0420 14:53:49.963372 139675612218944 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 48.575665s. directory=gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/linen_feat_nnx_trainstate_and_training_loop_20260420_142345_10_shardy_true/checkpoints/9 I0420 14:53:49.963450 139675612218944 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 43.171022s. I0420 14:53:49.963699 139675662550592 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0420 14:53:49.963829 139675662550592 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0420 14:53:49.963902 139675662550592 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0420 14:53:49.963947 139675662550592 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0420 14:53:49.964424 139788957146240 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 14:53:49.965010 139788957146240 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0420 14:53:49.966396 139788957146240 metric_logger.py:196] completed step: 9, seconds: 0.117, TFLOP/s/device: 115.750, Tokens/s/device: 17447.160, total_weights: 12300, loss: 8.710, lm_loss: 8.710, perplexity: 6065.008 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops