feat/nnx-trainstate-and-training-loop| Metric | Linen a2a803184 | NNX a2a803184 | Diff (NNX − Linen) |
|---|---|---|---|
| Parameters | 1.104 billion | 1.104 billion | — |
| Final loss | 8.7100 | 8.6680 | -0.042 |
| TFLOP/s | 115.776 | 115.209 | -0.567 |
| Tok/s | 17451.0 | 17365.5 | -85.528 |
| Avg s/step | 2.991 | 2.952 | -0.039 |
| Memory % | 5.09 | 5.09 | 0 |
| JAX | 0.9.2 | 0.9.2 | — |
Diff = NNX value − Linen value. Green = NNX improved. Red = NNX regressed.
2026-04-16 01:04:02.041638: 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) I0416 01:04:02.156480 131550224448640 max_utils.py:238] Skipping jax distributed system due to skip_jax_distributed_system=True flag. I0416 01:04:37.269373 131550224448640 max_utils.py:800] System Information: Jax Version: 0.9.2 I0416 01:04:37.269490 131550224448640 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0416 01:04:37.269529 131550224448640 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 I0416 01:04:37.269555 131550224448640 train_utils.py:364] WARNING: 'dataset_path' might be pointing your local file system I0416 01:04:37.269641 131550224448640 train.py:812] [DECOUPLED NO-OP] skipping cloud diagnostics wrapper. W0416 01:04:37.366948 3462220 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0416 01:04:37.782607 131550224448640 maxtext_utils.py:1687] Num_devices: 8, shape (1, 1, 1, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0416 01:04:37.782784 131550224448640 maxtext_utils.py:1687] Num_devices: 8, shape (1, 1, 1, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0416 01:04:37.783000 131550224448640 checkpointing.py:688] Setting up checkpoint logger... I0416 01:04:37.783040 131550224448640 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0416 01:04:37.783092 131550224448640 pytree_checkpoint_handler.py:577] save_device_host_concurrent_bytes=None I0416 01:04:37.783751 131550224448640 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 0x77a4557f5070>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0416 01:04:40.126029 131550224448640 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0416 01:04:40.126253 131550224448640 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 0x779dd9536e70>}, handler_registry=None I0416 01:04:40.126495 131550224448640 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x779dd9536e70>` 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`. I0416 01:04:40.126534 131550224448640 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x779dd9537230>` 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`. I0416 01:04:40.126562 131550224448640 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 0x779dd9536e70>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x779dd9536e70>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x779dd9537230>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x779dd9537230>}). I0416 01:04:40.126859 131550224448640 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.28 I0416 01:04:40.126914 131550224448640 async_checkpointer.py:177] [process=0][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>.<lambda> at 0x779dd95420c0> timeout: 600 secs and primary_host=0 for async checkpoint writes I0416 01:04:40.258479 131550224448640 checkpoint_manager.py:1788] Found 0 checkpoint steps in gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/linen_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints I0416 01:04:40.258705 131550224448640 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_20260416_004836/linen_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x779dd9942690> I0416 01:04:40.258791 131550224448640 checkpointing.py:302] Checkpoint manager created! I0416 01:04:40.337731 131550224448640 dataset_info.py:707] Load dataset info from tests/assets/local_datasets/c4_en_dataset_minimal/c4/en/3.1.0 I0416 01:04:40.340828 131550224448640 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. I0416 01:04:40.395030 131550224448640 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 I0416 01:04:40.422192 131550224448640 tokenizer.py:245] Tokenizer path: src/maxtext/assets/tokenizers/tokenizer.llama2 I0416 01:04:40.422258 131550224448640 tokenizer.py:187] Loading sentencepiece tokenizer: src/maxtext/assets/tokenizers/tokenizer.llama2 I0416 01:04:40.979407 131550224448640 dataset_info.py:707] Load dataset info from tests/assets/local_datasets/c4_en_dataset_minimal/c4/en/3.1.0 I0416 01:04:40.981213 131550224448640 reader.py:262] Creating a tf.data.Dataset reading 2 files located in folders: tests/assets/local_datasets/c4_en_dataset_minimal/c4/en/3.1.0. I0416 01:04:40.997552 131550224448640 logging_logger.py:49] Constructing tf.data.Dataset __local_c4_builder for split validation, from tests/assets/local_datasets/c4_en_dataset_minimal/c4/en/3.1.0 I0416 01:04:41.000213 131550224448640 tokenizer.py:245] Tokenizer path: src/maxtext/assets/tokenizers/tokenizer.llama2 I0416 01:04:41.000269 131550224448640 tokenizer.py:187] Loading sentencepiece tokenizer: src/maxtext/assets/tokenizers/tokenizer.llama2 I0416 01:04:41.675074 131550224448640 nnx_wrappers.py:437] Unknown Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0416 01:04:41.675179 131550224448640 nnx_wrappers.py:437] Unknown Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0416 01:04:41.777834 131550224448640 attentions.py:1088] attentions/inputs_q Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0416 01:04:41.777924 131550224448640 attentions.py:1088] attentions/inputs_q Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0416 01:04:41.792790 131550224448640 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0416 01:04:41.792842 131550224448640 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0416 01:04:41.814372 131550224448640 attentions.py:1154] attentions/query Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0416 01:04:41.814428 131550224448640 attentions.py:1154] attentions/query Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0416 01:04:41.829312 131550224448640 attentions.py:1155] attentions/key Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0416 01:04:41.829367 131550224448640 attentions.py:1155] attentions/key Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0416 01:04:41.844264 131550224448640 attentions.py:1156] attentions/value Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0416 01:04:41.844318 131550224448640 attentions.py:1156] attentions/value Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0416 01:04:41.867589 131550224448640 attentions.py:1197] attentions/out Logical: bfloat16[8,2048,16,128]..................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0416 01:04:41.867649 131550224448640 attentions.py:1197] attentions/out Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0416 01:04:41.886677 131550224448640 linears.py:525] linears/x Logical: bfloat16[8,2048,7168]....................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0416 01:04:41.886734 131550224448640 linears.py:525] linears/x Physical: bfloat16[8,2048,7168]....................................... ('fsdp', None, None). I0416 01:04:42.082248 131550224448640 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0416 01:04:42.082353 131550224448640 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. W0416 01:04:42.134279 3462220 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 I0416 01:04:42.529160 131550224448640 maxtext_utils.py:1790] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0416 01:04:42.529274 131550224448640 maxtext_utils.py:1790] params/params/decoder/layers/mlp/wi_0/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0416 01:04:42.529316 131550224448640 maxtext_utils.py:1790] params/params/decoder/layers/mlp/wi_1/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0416 01:04:42.529359 131550224448640 maxtext_utils.py:1790] params/params/decoder/layers/mlp/wo/kernel Shape: float32[7168,16,2048] Logical: P('mlp', 'layers', 'embed') Physical: (None, None, 'fsdp') I0416 01:04:42.529401 131550224448640 maxtext_utils.py:1790] params/params/decoder/layers/post_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0416 01:04:42.529429 131550224448640 maxtext_utils.py:1790] params/params/decoder/layers/pre_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0416 01:04:42.529474 131550224448640 maxtext_utils.py:1790] 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) I0416 01:04:42.529515 131550224448640 maxtext_utils.py:1790] 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') I0416 01:04:42.529546 131550224448640 maxtext_utils.py:1790] 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) I0416 01:04:42.529572 131550224448640 maxtext_utils.py:1790] 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) I0416 01:04:42.529606 131550224448640 maxtext_utils.py:1790] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', None) I0416 01:04:42.529640 131550224448640 maxtext_utils.py:1790] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0416 01:04:42.966781 131550224448640 train.py:157] train/xent Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length'). I0416 01:04:42.966872 131550224448640 train.py:157] train/xent Physical: float32[8,2048]............................................. ('fsdp', None). I0416 01:04:42.981540 131550224448640 train.py:164] train/z_loss Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length'). I0416 01:04:42.981592 131550224448640 train.py:164] train/z_loss Physical: float32[8,2048]............................................. ('fsdp', None). W0416 01:04:43.279453 3462220 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0416 01:04:43.401160 131550224448640 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. I0416 01:04:43.401694 131550224448640 max_utils.py:194] tensorboardX not available; using no-op SummaryWriter. I0416 01:04:43.401840 131550224448640 metric_logger.py:289] number parameters: 1.104 billion W0416 01:04:46.527872 3462220 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0416 01:04:46.661287 131550224448640 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0416 01:04:46.781957 131550224448640 checkpointing.py:798] Waited 0.12066650390625 seconds for step 0 to finish before starting checkpointing. I0416 01:04:46.782475 131550224448640 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0416 01:04:46.782655 131550224448640 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 0 I0416 01:04:46.783141 131550224448640 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/linen_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/0. I0416 01:04:46.876796 131550224448640 signaling_client.py:373] Using ThreadSafeKeyValueSignalingClient I0416 01:04:46.966860 131435115578944 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/linen_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/0 I0416 01:04:46.976090 131550224448640 jax_array_handlers.py:347] Scheduling D2H of 39 prioritized jax.Array. I0416 01:04:46.976192 131550224448640 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 W0416 01:04:47.208683 3462220 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 01:04:47.227262 3462220 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 01:04:47.239492 3462220 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 01:04:47.251469 3462220 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 01:04:47.258013 3462220 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 01:04:47.263141 3462220 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 01:04:47.267848 3462220 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 01:04:47.272152 3462220 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0416 01:04:47.745085 131435105093184 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/linen_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/0/items I0416 01:04:47.903275 131435065247296 checkpoint.py:188] Wrote Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776301487655499480, 'commit_timestamp_nsecs': None, 'custom_metadata': {}}, json={"item_handlers": null, "metrics": {}, "performance_metrics": {}, "init_timestamp_nsecs": 1776301487655499480, "commit_timestamp_nsecs": null, "custom_metadata": {}} to gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/linen_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/0/_CHECKPOINT_METADATA I0416 01:04:48.213024 3465182 google_auth_provider.cc:149] Using credentials at ~/.config/gcloud/application_default_credentials.json I0416 01:04:48.213097 3465182 google_auth_provider.cc:156] Using OAuth2 AuthProvider I0416 01:04:48.669149 131550224448640 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 1.693571s I0416 01:04:48.673876 131550224448640 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 6.873 GiB/s (total gbytes: 12.3 GiB) (time elapsed: a second) (per-host) I0416 01:04:48.673940 131550224448640 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 1.795639s (batch_requests_ready=0.093873s, total_serialization_initiated=1.697161s, others=0.004605s) I0416 01:04:48.674017 131550224448640 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.796628s (all_items=0.000028s, per_item={'items': '0.00002789'}, temp_paths=1.796600) I0416 01:04:48.675422 131435126064704 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0416 01:04:48.675506 131550224448640 async_checkpointer.py:561] Finished blocking save. Time taken: 1.892809s. Continuing background save to gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/linen_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/0. I0416 01:04:48.675695 131550224448640 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0416 01:04:48.675866 131434991846976 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0416 01:04:48.675963 131550224448640 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/linen_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776301486.7824595, 'wait_for_prev_duration_secs': 4.458427429199219e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776301486.782676, 'checkpointer_blocking_duration_secs': 1.892939805984497, 'get_old_steps_start_time': 1776301488.675634, 'get_old_steps_duration_secs': 2.6464462280273438e-05, 'checkpoint_manager_blocking_start_time': 1776301486.782357, 'checkpoint_manager_blocking_duration_secs': 1.8935792446136475} I0416 01:04:48.676100 131550224448640 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0416 01:04:48.676146 131550224448640 max_utils.py:750] Memstats: After params initialized: I0416 01:04:48.676201 131550224448640 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_0(process=0,(0,0,0,0)) I0416 01:04:48.676227 131550224448640 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_1(process=0,(1,0,0,0)) I0416 01:04:48.676249 131550224448640 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_2(process=0,(0,1,0,0)) I0416 01:04:48.676267 131550224448640 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_3(process=0,(1,1,0,0)) I0416 01:04:48.676285 131550224448640 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_4(process=0,(0,2,0,0)) I0416 01:04:48.676303 131550224448640 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_5(process=0,(1,2,0,0)) I0416 01:04:48.676319 131550224448640 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_6(process=0,(0,3,0,0)) I0416 01:04:48.676336 131550224448640 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_7(process=0,(1,3,0,0)) W0416 01:04:48.682704 3462220 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 01:04:48.689255 3462220 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 01:04:48.693840 3462220 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0416 01:04:49.014013 131550224448640 metric_logger.py:185] completed step: 0, seconds: 3.259, TFLOP/s/device: 4.169, Tokens/s/device: 628.424, total_weights: 13328, loss: 10.828 I0416 01:04:49.014918 131550224448640 metric_logger.py:269] To see full metrics 'tensorboard --logdir=gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/linen_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/tensorboard/' I0416 01:04:49.130203 131550224448640 metric_logger.py:185] completed step: 1, seconds: 2.351, TFLOP/s/device: 5.780, Tokens/s/device: 871.215, total_weights: 12332, loss: 10.828 I0416 01:04:49.247269 131550224448640 metric_logger.py:185] completed step: 2, seconds: 0.009, TFLOP/s/device: 1491.780, Tokens/s/device: 224857.268, total_weights: 15161, loss: 9.823 I0416 01:04:49.483564 131435084121664 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_20260416_004836/linen_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/0/items/array_metadatas/process_0 W0416 01:04:53.536412 3462220 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0416 01:04:53.621850 131550224448640 train.py:729] Completed eval step 0 I0416 01:04:53.663680 131550224448640 train.py:729] Completed eval step 1 I0416 01:04:53.668142 131550224448640 metric_logger.py:204] eval metrics after step: 4, loss=8.979, total_weights=26703.0 I0416 01:04:53.668477 131550224448640 metric_logger.py:185] completed step: 3, seconds: 0.117, TFLOP/s/device: 115.837, Tokens/s/device: 17460.250, total_weights: 13327, loss: 9.405 I0416 01:05:13.331530 131550224448640 metric_logger.py:185] completed step: 4, seconds: 0.117, TFLOP/s/device: 116.125, Tokens/s/device: 17503.675, total_weights: 11939, loss: 9.045 I0416 01:05:13.341376 131550224448640 metric_logger.py:185] completed step: 5, seconds: 4.421, TFLOP/s/device: 3.073, Tokens/s/device: 463.208, total_weights: 15502, loss: 8.953 I0416 01:05:13.457870 131550224448640 metric_logger.py:185] completed step: 6, seconds: 19.664, TFLOP/s/device: 0.691, Tokens/s/device: 104.152, total_weights: 13864, loss: 8.775 I0416 01:05:13.575075 131550224448640 metric_logger.py:185] completed step: 7, seconds: 0.006, TFLOP/s/device: 2162.523, Tokens/s/device: 325958.937, total_weights: 12988, loss: 8.688 I0416 01:05:13.652690 131435012818496 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 24.978034s (commit=24.467878s, array_metadata_write=0.510156s) I0416 01:05:13.653815 131435126064704 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 471.954 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 26 seconds) (per-host) I0416 01:05:13.653873 131435126064704 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 24.978322s. I0416 01:05:14.104363 131435126064704 checkpoint.py:228] Read Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776301487655499480, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} from gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/linen_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/0/_CHECKPOINT_METADATA I0416 01:05:14.268719 131550224448640 train.py:729] Completed eval step 0 I0416 01:05:14.307636 131550224448640 train.py:729] Completed eval step 1 I0416 01:05:14.311868 131550224448640 metric_logger.py:204] eval metrics after step: 9, loss=8.653, total_weights=26703.0 I0416 01:05:14.312210 131550224448640 metric_logger.py:185] completed step: 8, seconds: 0.117, TFLOP/s/device: 115.949, Tokens/s/device: 17477.087, total_weights: 13820, loss: 8.740 I0416 01:05:14.314559 131550224448640 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0416 01:05:14.315638 131550224448640 checkpointing.py:798] Waited 0.0010743141174316406 seconds for step 9 to finish before starting checkpointing. I0416 01:05:14.315911 131550224448640 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0416 01:05:14.363128 131435126064704 array_metadata_store.py:367] [process=0][thread=async_save] Skipped cross-host ArrayMetadata validation because only one process is found: process_index=0. I0416 01:05:14.610735 131435065247296 checkpoint.py:247] Updated Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776301487655499480, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} to gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/linen_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/0/_CHECKPOINT_METADATA I0416 01:05:14.774560 131435126064704 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389). I0416 01:05:14.774760 131435126064704 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.564696s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/linen_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/0/items I0416 01:05:14.776159 131435126064704 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/linen_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/0/items I0416 01:05:15.021089 131435126064704 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/linen_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/0 I0416 01:05:15.701090 131435126064704 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_20260416_004836/linen_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/0`. I0416 01:05:15.701837 131435126064704 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 28.919147s. directory=gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/linen_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/0 I0416 01:05:15.701920 131435126064704 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 27.026370s. I0416 01:05:15.702148 131434991846976 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0416 01:05:15.702275 131434991846976 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0416 01:05:15.702332 131434991846976 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0416 01:05:15.702384 131434991846976 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0416 01:05:15.702520 131550224448640 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. W0416 01:05:15.702644 131550224448640 checkpoint_manager.py:1441] Waiting for previous save to complete took 1.386732 seconds. If this number is high, consider checkpointing less frequently. I0416 01:05:15.703474 131550224448640 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 9 I0416 01:05:15.703764 131550224448640 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/linen_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/9. I0416 01:05:15.890710 131434991846976 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/linen_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/9 I0416 01:05:15.895869 131550224448640 jax_array_handlers.py:347] Scheduling D2H of 39 prioritized jax.Array. I0416 01:05:15.895975 131550224448640 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 I0416 01:05:16.640182 131434404644416 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/linen_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/9/items I0416 01:05:21.120484 131550224448640 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 5.225098s I0416 01:05:21.120888 131550224448640 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.318 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 5 seconds) (per-host) I0416 01:05:21.120941 131550224448640 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 5.322855s (batch_requests_ready=0.093874s, total_serialization_initiated=5.228706s, others=0.000275s) I0416 01:05:21.121005 131550224448640 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 5.323447s (all_items=0.000018s, per_item={'items': '0.00001788'}, temp_paths=5.323429) I0416 01:05:21.126394 131434991846976 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0416 01:05:21.126476 131550224448640 async_checkpointer.py:561] Finished blocking save. Time taken: 5.422959s. Continuing background save to gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/linen_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/9. I0416 01:05:21.126670 131550224448640 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0416 01:05:21.126838 131435126064704 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0416 01:05:21.126921 131550224448640 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/linen_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776301514.315882, 'wait_for_prev_duration_secs': 1.3867318630218506, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776301515.7034974, 'checkpointer_blocking_duration_secs': 5.423088550567627, 'get_old_steps_start_time': 1776301521.1266017, 'get_old_steps_duration_secs': 2.9802322387695312e-05, 'checkpoint_manager_blocking_start_time': 1776301514.3158436, 'checkpoint_manager_blocking_duration_secs': 6.811050653457642} I0416 01:05:21.127060 131550224448640 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0416 01:05:21.127095 131550224448640 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0416 01:05:21.877192 131434394158656 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_20260416_004836/linen_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/9/items/array_metadatas/process_0 I0416 01:06:02.855088 131434404644416 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 41.733698s (commit=41.253537s, array_metadata_write=0.480161s) I0416 01:06:02.856475 131434991846976 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 268.534 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 47 seconds) (per-host) I0416 01:06:02.856552 131434991846976 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.730028s. I0416 01:06:03.274891 131434991846976 array_metadata_store.py:367] [process=0][thread=async_save] Skipped cross-host ArrayMetadata validation because only one process is found: process_index=0. I0416 01:06:03.666443 131434991846976 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389). I0416 01:06:03.667189 131434991846976 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.536965s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/linen_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/9/items I0416 01:06:03.667930 131434991846976 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/linen_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/9/items I0416 01:06:03.906138 131434991846976 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/linen_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/9 I0416 01:06:04.610545 131434991846976 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_20260416_004836/linen_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/9`. I0416 01:06:04.611301 131434991846976 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 48.907791s. directory=gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/linen_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/9 I0416 01:06:04.611385 131434991846976 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 43.484865s. I0416 01:06:04.611526 131435126064704 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0416 01:06:04.611580 131435126064704 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0416 01:06:04.611643 131435126064704 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0416 01:06:04.611683 131435126064704 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0416 01:06:04.611944 131550224448640 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. I0416 01:06:04.612107 131550224448640 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0416 01:06:04.613841 131550224448640 metric_logger.py:185] completed step: 9, seconds: 0.117, TFLOP/s/device: 115.776, Tokens/s/device: 17451.026, total_weights: 12300, loss: 8.710 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops
2026-04-16 02:19:54.655412: 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) I0416 02:19:54.771147 137276422560896 max_utils.py:238] Skipping jax distributed system due to skip_jax_distributed_system=True flag. I0416 02:20:35.059728 137276422560896 max_utils.py:800] System Information: Jax Version: 0.9.2 I0416 02:20:35.059851 137276422560896 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0416 02:20:35.059890 137276422560896 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 I0416 02:20:35.059916 137276422560896 train_utils.py:364] WARNING: 'dataset_path' might be pointing your local file system I0416 02:20:35.060002 137276422560896 train.py:812] [DECOUPLED NO-OP] skipping cloud diagnostics wrapper. W0416 02:20:35.156772 3542924 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0416 02:20:35.557439 137276422560896 maxtext_utils.py:1687] Num_devices: 8, shape (1, 1, 1, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0416 02:20:35.656798 137276422560896 checkpointing.py:688] Setting up checkpoint logger... I0416 02:20:35.656910 137276422560896 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0416 02:20:35.656951 137276422560896 pytree_checkpoint_handler.py:577] save_device_host_concurrent_bytes=None I0416 02:20:35.657161 137276422560896 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 0x7cd9921f8bc0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0416 02:20:37.963657 137276422560896 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0416 02:20:37.963860 137276422560896 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 0x7cd31499b4d0>}, handler_registry=None I0416 02:20:37.964144 137276422560896 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7cd31499b4d0>` 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`. I0416 02:20:37.964186 137276422560896 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7cd314998560>` 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`. I0416 02:20:37.964215 137276422560896 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 0x7cd31499b4d0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7cd31499b4d0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7cd314998560>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7cd314998560>}). I0416 02:20:37.964522 137276422560896 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.28 I0416 02:20:37.964575 137276422560896 async_checkpointer.py:177] [process=0][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>.<lambda> at 0x7cd315989940> timeout: 600 secs and primary_host=0 for async checkpoint writes I0416 02:20:38.092253 137276422560896 checkpoint_manager.py:1788] Found 0 checkpoint steps in gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/nnx_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints I0416 02:20:38.092494 137276422560896 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_20260416_004836/nnx_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7cd314998c50> I0416 02:20:38.092579 137276422560896 checkpointing.py:302] Checkpoint manager created! I0416 02:20:38.171639 137276422560896 dataset_info.py:707] Load dataset info from tests/assets/local_datasets/c4_en_dataset_minimal/c4/en/3.1.0 I0416 02:20:38.174755 137276422560896 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. I0416 02:20:38.229168 137276422560896 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 I0416 02:20:38.259776 137276422560896 tokenizer.py:245] Tokenizer path: src/maxtext/assets/tokenizers/tokenizer.llama2 I0416 02:20:38.259851 137276422560896 tokenizer.py:187] Loading sentencepiece tokenizer: src/maxtext/assets/tokenizers/tokenizer.llama2 I0416 02:20:39.183369 137276422560896 dataset_info.py:707] Load dataset info from tests/assets/local_datasets/c4_en_dataset_minimal/c4/en/3.1.0 I0416 02:20:39.184986 137276422560896 reader.py:262] Creating a tf.data.Dataset reading 2 files located in folders: tests/assets/local_datasets/c4_en_dataset_minimal/c4/en/3.1.0. I0416 02:20:39.201071 137276422560896 logging_logger.py:49] Constructing tf.data.Dataset __local_c4_builder for split validation, from tests/assets/local_datasets/c4_en_dataset_minimal/c4/en/3.1.0 I0416 02:20:39.203634 137276422560896 tokenizer.py:245] Tokenizer path: src/maxtext/assets/tokenizers/tokenizer.llama2 I0416 02:20:39.203683 137276422560896 tokenizer.py:187] Loading sentencepiece tokenizer: src/maxtext/assets/tokenizers/tokenizer.llama2 I0416 02:20:39.545263 137276422560896 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0416 02:20:39.545374 137276422560896 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. W0416 02:20:39.657196 3542924 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 I0416 02:20:39.869870 137276422560896 nnx_decoders.py:465] nnx_decoders/carry Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0416 02:20:39.869959 137276422560896 nnx_decoders.py:465] nnx_decoders/carry Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0416 02:20:39.875064 137276422560896 nnx_decoders.py:465] Unknown Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0416 02:20:39.875112 137276422560896 nnx_decoders.py:465] Unknown Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0416 02:20:39.890193 137276422560896 attentions.py:1088] attentions/inputs_q Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0416 02:20:39.890246 137276422560896 attentions.py:1088] attentions/inputs_q Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0416 02:20:39.904537 137276422560896 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0416 02:20:39.904587 137276422560896 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0416 02:20:39.927574 137276422560896 attentions.py:1154] attentions/query Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0416 02:20:39.927635 137276422560896 attentions.py:1154] attentions/query Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0416 02:20:39.942053 137276422560896 attentions.py:1155] attentions/key Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0416 02:20:39.942108 137276422560896 attentions.py:1155] attentions/key Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0416 02:20:39.956451 137276422560896 attentions.py:1156] attentions/value Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0416 02:20:39.956501 137276422560896 attentions.py:1156] attentions/value Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0416 02:20:39.984714 137276422560896 attentions.py:1197] attentions/out Logical: bfloat16[8,2048,16,128]..................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0416 02:20:39.984777 137276422560896 attentions.py:1197] attentions/out Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0416 02:20:40.002770 137276422560896 linears.py:525] linears/x Logical: bfloat16[8,2048,7168]....................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0416 02:20:40.002827 137276422560896 linears.py:525] linears/x Physical: bfloat16[8,2048,7168]....................................... ('fsdp', None, None). W0416 02:20:40.364495 3542924 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0416 02:20:40.484566 137276422560896 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. I0416 02:20:40.485108 137276422560896 max_utils.py:194] tensorboardX not available; using no-op SummaryWriter. I0416 02:20:40.486428 137276422560896 metric_logger.py:289] number parameters: 1.104 billion W0416 02:20:43.348252 3542924 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0416 02:20:43.485869 137276422560896 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0416 02:20:43.605736 137276422560896 checkpointing.py:798] Waited 0.11985135078430176 seconds for step 0 to finish before starting checkpointing. I0416 02:20:43.606209 137276422560896 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0416 02:20:43.606357 137276422560896 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 0 I0416 02:20:43.606747 137276422560896 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/nnx_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/0. I0416 02:20:43.690209 137276422560896 signaling_client.py:373] Using ThreadSafeKeyValueSignalingClient I0416 02:20:43.788940 137276422560896 jax_array_handlers.py:347] Scheduling D2H of 69 prioritized jax.Array. I0416 02:20:43.789060 137276422560896 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 I0416 02:20:43.795545 137161403795008 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/nnx_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/0 I0416 02:20:44.446598 137161393309248 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/nnx_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/0/items W0416 02:20:44.475406 3542924 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 02:20:44.488441 3542924 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 02:20:44.496771 3542924 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 02:20:44.509588 3542924 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 02:20:44.520591 3542924 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 02:20:44.527185 3542924 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 02:20:44.532223 3542924 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 02:20:44.539533 3542924 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0416 02:20:44.629503 137161345074752 checkpoint.py:188] Wrote Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776306044367978775, 'commit_timestamp_nsecs': None, 'custom_metadata': {}}, json={"item_handlers": null, "metrics": {}, "performance_metrics": {}, "init_timestamp_nsecs": 1776306044367978775, "commit_timestamp_nsecs": null, "custom_metadata": {}} to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/nnx_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/0/_CHECKPOINT_METADATA I0416 02:20:44.957966 3546049 google_auth_provider.cc:149] Using credentials at ~/.config/gcloud/application_default_credentials.json I0416 02:20:44.958037 3546049 google_auth_provider.cc:156] Using OAuth2 AuthProvider I0416 02:20:45.145218 137276422560896 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 1.357722s I0416 02:20:45.151332 137276422560896 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 8.454 GiB/s (total gbytes: 12.3 GiB) (time elapsed: a second) (per-host) I0416 02:20:45.151405 137276422560896 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 1.459837s (batch_requests_ready=0.087765s, total_serialization_initiated=1.366064s, others=0.006008s) I0416 02:20:45.151492 137276422560896 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.460463s (all_items=0.000019s, per_item={'items': '0.00001931'}, temp_paths=1.460443) I0416 02:20:45.152839 137161414280768 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0416 02:20:45.152932 137276422560896 async_checkpointer.py:561] Finished blocking save. Time taken: 1.546535s. Continuing background save to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/nnx_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/0. I0416 02:20:45.153126 137276422560896 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0416 02:20:45.153338 137161261188672 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0416 02:20:45.153454 137276422560896 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/nnx_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776306043.6061974, 'wait_for_prev_duration_secs': 4.0531158447265625e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776306043.6063783, 'checkpointer_blocking_duration_secs': 1.5466625690460205, 'get_old_steps_start_time': 1776306045.1530716, 'get_old_steps_duration_secs': 2.0265579223632812e-05, 'checkpoint_manager_blocking_start_time': 1776306043.606114, 'checkpoint_manager_blocking_duration_secs': 1.5473113059997559} I0416 02:20:45.153568 137276422560896 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0416 02:20:45.153621 137276422560896 max_utils.py:750] Memstats: After params initialized: I0416 02:20:45.153667 137276422560896 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_0(process=0,(0,0,0,0)) I0416 02:20:45.153692 137276422560896 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_1(process=0,(1,0,0,0)) I0416 02:20:45.153711 137276422560896 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_2(process=0,(0,1,0,0)) I0416 02:20:45.153729 137276422560896 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_3(process=0,(1,1,0,0)) I0416 02:20:45.153747 137276422560896 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_4(process=0,(0,2,0,0)) I0416 02:20:45.153764 137276422560896 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_5(process=0,(1,2,0,0)) I0416 02:20:45.153781 137276422560896 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_6(process=0,(0,3,0,0)) I0416 02:20:45.153797 137276422560896 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_7(process=0,(1,3,0,0)) W0416 02:20:45.160146 3542924 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 02:20:45.165977 3542924 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 02:20:45.170831 3542924 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0416 02:20:45.504962 137276422560896 metric_logger.py:185] completed step: 0, seconds: 2.998, TFLOP/s/device: 4.532, Tokens/s/device: 683.092, total_weights: 13328, loss: 10.880 I0416 02:20:45.505993 137276422560896 metric_logger.py:269] To see full metrics 'tensorboard --logdir=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/nnx_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/tensorboard/' I0416 02:20:45.613905 137276422560896 metric_logger.py:185] completed step: 1, seconds: 2.014, TFLOP/s/device: 6.748, Tokens/s/device: 1017.114, total_weights: 12332, loss: 10.862 I0416 02:20:45.730782 137276422560896 metric_logger.py:185] completed step: 2, seconds: 0.026, TFLOP/s/device: 530.436, Tokens/s/device: 79953.152, total_weights: 15161, loss: 9.926 I0416 02:20:46.404514 137161292645952 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_20260416_004836/nnx_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/0/items/array_metadatas/process_0 I0416 02:20:52.350948 137276422560896 train.py:729] Completed eval step 0 I0416 02:20:52.393002 137276422560896 train.py:729] Completed eval step 1 I0416 02:20:52.398070 137276422560896 metric_logger.py:204] eval metrics after step: 4, loss=8.926, total_weights=26703.0 I0416 02:20:52.398440 137276422560896 metric_logger.py:185] completed step: 3, seconds: 0.099, TFLOP/s/device: 137.270, Tokens/s/device: 20690.840, total_weights: 13327, loss: 9.396 I0416 02:21:09.798833 137276422560896 metric_logger.py:185] completed step: 4, seconds: 0.117, TFLOP/s/device: 116.073, Tokens/s/device: 17495.750, total_weights: 11939, loss: 9.005 I0416 02:21:09.808779 137276422560896 metric_logger.py:185] completed step: 5, seconds: 6.667, TFLOP/s/device: 2.038, Tokens/s/device: 307.175, total_weights: 15502, loss: 8.861 I0416 02:21:09.924885 137276422560896 metric_logger.py:185] completed step: 6, seconds: 17.400, TFLOP/s/device: 0.781, Tokens/s/device: 117.702, total_weights: 13864, loss: 8.738 I0416 02:21:10.041964 137276422560896 metric_logger.py:185] completed step: 7, seconds: 0.008, TFLOP/s/device: 1636.806, Tokens/s/device: 246717.263, total_weights: 12988, loss: 8.651 I0416 02:21:10.736971 137276422560896 train.py:729] Completed eval step 0 I0416 02:21:10.776144 137276422560896 train.py:729] Completed eval step 1 I0416 02:21:10.779282 137276422560896 metric_logger.py:204] eval metrics after step: 9, loss=8.623, total_weights=26703.0 I0416 02:21:10.779608 137276422560896 metric_logger.py:185] completed step: 8, seconds: 0.116, TFLOP/s/device: 117.035, Tokens/s/device: 17640.725, total_weights: 13820, loss: 8.671 I0416 02:21:10.782751 137276422560896 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0416 02:21:10.783925 137276422560896 checkpointing.py:798] Waited 0.0011758804321289062 seconds for step 9 to finish before starting checkpointing. I0416 02:21:10.784178 137276422560896 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0416 02:21:11.951100 137161282160192 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 26.798869s (commit=26.378904s, array_metadata_write=0.419965s) I0416 02:21:11.952259 137161414280768 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 447.151 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 28 seconds) (per-host) I0416 02:21:11.952322 137161414280768 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 26.799346s. I0416 02:21:12.174217 137161414280768 checkpoint.py:228] Read Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776306044367978775, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} from gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/nnx_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/0/_CHECKPOINT_METADATA I0416 02:21:12.363214 137161414280768 array_metadata_store.py:367] [process=0][thread=async_save] Skipped cross-host ArrayMetadata validation because only one process is found: process_index=0. I0416 02:21:12.550201 137161345074752 checkpoint.py:247] Updated Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776306044367978775, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/nnx_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/0/_CHECKPOINT_METADATA I0416 02:21:12.778914 137161414280768 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389). I0416 02:21:12.779149 137161414280768 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.562983s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/nnx_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/0/items I0416 02:21:12.779877 137161414280768 atomicity.py:608] Finalizing gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/nnx_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/0/items I0416 02:21:13.036151 137161414280768 atomicity.py:608] Finalizing gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/nnx_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/0 I0416 02:21:13.708936 137161414280768 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_20260416_004836/nnx_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/0`. I0416 02:21:13.709669 137161414280768 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 30.103278s. directory=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/nnx_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/0 I0416 02:21:13.709745 137161414280768 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 28.556770s. I0416 02:21:13.709915 137161261188672 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0416 02:21:13.710031 137161261188672 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0416 02:21:13.710105 137161261188672 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0416 02:21:13.710149 137161261188672 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0416 02:21:13.710306 137276422560896 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. W0416 02:21:13.710448 137276422560896 checkpoint_manager.py:1441] Waiting for previous save to complete took 2.926263 seconds. If this number is high, consider checkpointing less frequently. I0416 02:21:13.711218 137276422560896 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 9 I0416 02:21:13.711532 137276422560896 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/nnx_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/9. I0416 02:21:13.882831 137161261188672 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/nnx_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/9 I0416 02:21:13.894963 137276422560896 jax_array_handlers.py:347] Scheduling D2H of 69 prioritized jax.Array. I0416 02:21:13.895079 137276422560896 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 I0416 02:21:15.248996 137161250702912 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/nnx_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/9/items I0416 02:21:22.922090 137276422560896 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 9.028187s I0416 02:21:22.929982 137276422560896 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 1.351 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 9 seconds) (per-host) I0416 02:21:22.930062 137276422560896 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 9.137722s (batch_requests_ready=0.094028s, total_serialization_initiated=9.035922s, others=0.007773s) I0416 02:21:22.930144 137276422560896 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 9.138314s (all_items=0.000019s, per_item={'items': '0.00001907'}, temp_paths=9.138295) I0416 02:21:22.931617 137161261188672 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0416 02:21:22.931704 137276422560896 async_checkpointer.py:561] Finished blocking save. Time taken: 9.220442s. Continuing background save to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/nnx_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/9. I0416 02:21:22.931898 137276422560896 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0416 02:21:22.932100 137160514602560 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0416 02:21:22.932173 137276422560896 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/nnx_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776306070.784151, 'wait_for_prev_duration_secs': 2.9262633323669434, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776306073.7112439, 'checkpointer_blocking_duration_secs': 9.220570087432861, 'get_old_steps_start_time': 1776306082.9318306, 'get_old_steps_duration_secs': 3.0040740966796875e-05, 'checkpoint_manager_blocking_start_time': 1776306070.784108, 'checkpoint_manager_blocking_duration_secs': 12.148037672042847} I0416 02:21:22.932306 137276422560896 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0416 02:21:22.932341 137276422560896 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0416 02:21:23.661017 137161292645952 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_20260416_004836/nnx_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/9/items/array_metadatas/process_0 I0416 02:21:49.927312 137161250702912 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 26.996466s (commit=26.563085s, array_metadata_write=0.433381s) I0416 02:21:49.928701 137161261188672 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 349.697 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 36 seconds) (per-host) I0416 02:21:49.928759 137161261188672 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 26.997012s. I0416 02:21:50.324966 137161261188672 array_metadata_store.py:367] [process=0][thread=async_save] Skipped cross-host ArrayMetadata validation because only one process is found: process_index=0. I0416 02:21:50.704577 137161261188672 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389). I0416 02:21:50.704774 137161261188672 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.520714s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/nnx_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/9/items I0416 02:21:50.705503 137161261188672 atomicity.py:608] Finalizing gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/nnx_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/9/items I0416 02:21:50.936109 137161261188672 atomicity.py:608] Finalizing gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/nnx_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/9 I0416 02:21:51.600721 137161261188672 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_20260416_004836/nnx_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/9`. I0416 02:21:51.601488 137161261188672 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 37.890232s. directory=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_004836/nnx_feat_nnx_trainstate_and_training_loop_20260416_004836_07_eval/checkpoints/9 I0416 02:21:51.601568 137161261188672 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 28.669822s. I0416 02:21:51.601718 137160514602560 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0416 02:21:51.601768 137160514602560 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0416 02:21:51.601832 137160514602560 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0416 02:21:51.601872 137160514602560 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0416 02:21:51.602673 137276422560896 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. I0416 02:21:51.603414 137276422560896 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0416 02:21:51.604559 137276422560896 metric_logger.py:185] completed step: 9, seconds: 0.118, TFLOP/s/device: 115.209, Tokens/s/device: 17365.498, total_weights: 12300, loss: 8.668 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops