feat/nnx-trainstate-and-training-loop| Metric | Linen 29bbe47ed | NNX 29bbe47ed | Diff (NNX − Linen) |
|---|---|---|---|
| Parameters | 1.104 billion | 1.104 billion | — |
| Final loss | 8.7100 | 8.6680 | -0.042 |
| TFLOP/s | 115.322 | 113.309 | -2.013 |
| Tok/s | 17382.6 | 17079.2 | -303.404 |
| Avg s/step | 2.449 | 2.669 | +0.22 |
| Memory % | 5.09 | 5.09 | 0 |
| JAX | 0.8.1 | 0.8.1 | — |
Diff = NNX value − Linen value. Green = NNX improved. Red = NNX regressed.
2026-04-21 16:36:18.288179: E external/local_xla/xla/stream_executor/cuda/cuda_fft.cc:467] Unable to register cuFFT factory: Attempting to register factory for plugin cuFFT when one has already been registered WARNING: All log messages before absl::InitializeLog() is called are written to STDERR E0000 00:00:1776789378.298534 1608939 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered E0000 00:00:1776789378.301570 1608939 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered W0000 00:00:1776789378.311371 1608939 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776789378.311381 1608939 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776789378.311383 1608939 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776789378.311384 1608939 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. Unrecognized keys in `rope_scaling` for 'rope_type'='yarn': {'rope_theta'} `rope_scaling`'s factor field must be a float >= 1, got 40 `rope_scaling`'s beta_fast field must be a float, got 32 `rope_scaling`'s beta_slow field must be a float, got 1 Unrecognized keys in `rope_scaling` for 'rope_type'='yarn': {'rope_theta'} Unrecognized keys in `rope_scaling` for 'rope_type'='yarn': {'rope_theta'} Unrecognized keys in `rope_scaling` for 'rope_type'='yarn': {'rope_theta'} 2026-04-21 16:36:22.244235: 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) I0421 16:36:22.379707 135347584011392 max_utils.py:238] Skipping jax distributed system due to skip_jax_distributed_system=True flag. I0421 16:37:18.745735 135347584011392 max_utils.py:800] System Information: Jax Version: 0.8.1 I0421 16:37:18.745997 135347584011392 max_utils.py:801] System Information: Jaxlib Version: 0.8.1 I0421 16:37:18.746057 135347584011392 max_utils.py:802] System Information: Jax Backend: PJRT C API TFRT TPU v6 lite Built on Nov 12 2025 14:16:36 (1762985796) cl/831091709 I0421 16:37:18.746086 135347584011392 train_utils.py:378] WARNING: 'dataset_path' might be pointing your local file system I0421 16:37:18.746287 135347584011392 train.py:806] [DECOUPLED NO-OP] skipping cloud diagnostics wrapper. I0421 16:37:19.388098 135347584011392 maxtext_utils.py:1732] Num_devices: 8, shape (1, 1, 1, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0421 16:37:19.388268 135347584011392 maxtext_utils.py:1732] Num_devices: 8, shape (1, 1, 1, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0421 16:37:19.388424 135347584011392 checkpointing.py:688] Setting up checkpoint logger... I0421 16:37:19.388471 135347584011392 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0421 16:37:19.388510 135347584011392 pytree_checkpoint_handler.py:577] save_device_host_concurrent_bytes=None I0421 16:37:19.388948 135347584011392 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 0x7b18c49a7200>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0421 16:37:21.770352 135347584011392 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0421 16:37:21.770548 135347584011392 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 0x7b176efdd070>}, handler_registry=None I0421 16:37:21.770793 135347584011392 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7b176efdd070>` 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`. I0421 16:37:21.770837 135347584011392 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7b171b98d880>` 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`. I0421 16:37:21.770866 135347584011392 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 0x7b176efdd070>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7b176efdd070>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7b171b98d880>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7b171b98d880>}). I0421 16:37:21.771170 135347584011392 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.28 I0421 16:37:21.771224 135347584011392 async_checkpointer.py:177] [process=0][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>.<lambda> at 0x7b171b9b4ae0> timeout: 600 secs and primary_host=0 for async checkpoint writes I0421 16:37:21.895629 135347584011392 checkpoint_manager.py:1788] Found 0 checkpoint steps in gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/linen_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints I0421 16:37:21.895862 135347584011392 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_20260421_161934/linen_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7b171b98dc70> I0421 16:37:21.895941 135347584011392 checkpointing.py:302] Checkpoint manager created! I0421 16:37:21.972535 135347584011392 dataset_info.py:707] Load dataset info from tests/assets/local_datasets/c4_en_dataset_minimal/c4/en/3.1.0 I0421 16:37:21.975385 135347584011392 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. I0421 16:37:22.033484 135347584011392 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 I0421 16:37:22.056293 135347584011392 tokenizer.py:245] Tokenizer path: src/maxtext/assets/tokenizers/tokenizer.llama2 I0421 16:37:22.056356 135347584011392 tokenizer.py:187] Loading sentencepiece tokenizer: src/maxtext/assets/tokenizers/tokenizer.llama2 I0421 16:37:22.599852 135347584011392 dataset_info.py:707] Load dataset info from tests/assets/local_datasets/c4_en_dataset_minimal/c4/en/3.1.0 I0421 16:37:22.601411 135347584011392 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. I0421 16:37:22.617791 135347584011392 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 I0421 16:37:22.620410 135347584011392 tokenizer.py:245] Tokenizer path: src/maxtext/assets/tokenizers/tokenizer.llama2 I0421 16:37:22.620462 135347584011392 tokenizer.py:187] Loading sentencepiece tokenizer: src/maxtext/assets/tokenizers/tokenizer.llama2 I0421 16:37:22.941170 135347584011392 nnx_wrappers.py:437] Unknown Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0421 16:37:22.941267 135347584011392 nnx_wrappers.py:437] Unknown Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0421 16:37:23.239837 135347584011392 attentions.py:1088] attentions/inputs_q Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0421 16:37:23.239927 135347584011392 attentions.py:1088] attentions/inputs_q Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0421 16:37:23.252493 135347584011392 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0421 16:37:23.252541 135347584011392 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0421 16:37:23.271451 135347584011392 attentions.py:1154] attentions/query Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0421 16:37:23.271506 135347584011392 attentions.py:1154] attentions/query Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0421 16:37:23.284118 135347584011392 attentions.py:1155] attentions/key Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0421 16:37:23.284172 135347584011392 attentions.py:1155] attentions/key Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0421 16:37:23.296765 135347584011392 attentions.py:1156] attentions/value Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0421 16:37:23.296818 135347584011392 attentions.py:1156] attentions/value Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0421 16:37:23.316714 135347584011392 attentions.py:1198] attentions/out Logical: bfloat16[8,2048,16,128]..................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0421 16:37:23.316774 135347584011392 attentions.py:1198] attentions/out Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0421 16:37:23.332590 135347584011392 linears.py:525] linears/x Logical: bfloat16[8,2048,7168]....................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0421 16:37:23.332644 135347584011392 linears.py:525] linears/x Physical: bfloat16[8,2048,7168]....................................... ('fsdp', None, None). I0421 16:37:23.485569 135347584011392 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0421 16:37:23.485669 135347584011392 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. [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 I0421 16:37:24.037858 135347584011392 maxtext_utils.py:1835] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: PartitionSpec('norm',) Physical: (None,) I0421 16:37:24.037978 135347584011392 maxtext_utils.py:1835] params/params/decoder/layers/mlp/wi_0/kernel Shape: float32[2048,16,7168] Logical: PartitionSpec('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0421 16:37:24.038022 135347584011392 maxtext_utils.py:1835] params/params/decoder/layers/mlp/wi_1/kernel Shape: float32[2048,16,7168] Logical: PartitionSpec('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0421 16:37:24.038085 135347584011392 maxtext_utils.py:1835] params/params/decoder/layers/mlp/wo/kernel Shape: float32[7168,16,2048] Logical: PartitionSpec('mlp', 'layers', 'embed') Physical: (None, None, 'fsdp') I0421 16:37:24.038130 135347584011392 maxtext_utils.py:1835] params/params/decoder/layers/post_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: PartitionSpec('norm', 'layers') Physical: (None, None) I0421 16:37:24.038160 135347584011392 maxtext_utils.py:1835] params/params/decoder/layers/pre_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: PartitionSpec('norm', 'layers') Physical: (None, None) I0421 16:37:24.038201 135347584011392 maxtext_utils.py:1835] params/params/decoder/layers/self_attention/key/kernel Shape: float32[2048,16,16,128] Logical: PartitionSpec('embed', 'layers', 'kv_heads', 'kv_head_dim') Physical: ('fsdp', None, None, None) I0421 16:37:24.038243 135347584011392 maxtext_utils.py:1835] params/params/decoder/layers/self_attention/out/kernel Shape: float32[16,16,128,2048] Logical: PartitionSpec('heads', 'layers', 'kv', 'embed') Physical: (None, None, None, 'fsdp') I0421 16:37:24.038275 135347584011392 maxtext_utils.py:1835] params/params/decoder/layers/self_attention/query/kernel Shape: float32[2048,16,16,128] Logical: PartitionSpec('embed', 'layers', 'q_heads', 'kv') Physical: ('fsdp', None, None, None) I0421 16:37:24.038304 135347584011392 maxtext_utils.py:1835] params/params/decoder/layers/self_attention/value/kernel Shape: float32[2048,16,16,128] Logical: PartitionSpec('embed', 'layers', 'kv_heads', 'kv_head_dim') Physical: ('fsdp', None, None, None) I0421 16:37:24.038344 135347584011392 maxtext_utils.py:1835] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: PartitionSpec('embed_vocab', 'vocab') Physical: ('fsdp', None) I0421 16:37:24.038382 135347584011392 maxtext_utils.py:1835] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: PartitionSpec('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0421 16:37:24.710378 135347584011392 train.py:157] train/xent Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length'). I0421 16:37:24.710459 135347584011392 train.py:157] train/xent Physical: float32[8,2048]............................................. ('fsdp', None). I0421 16:37:24.722981 135347584011392 train.py:164] train/z_loss Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length'). I0421 16:37:24.723033 135347584011392 train.py:164] train/z_loss Physical: float32[8,2048]............................................. ('fsdp', None). I0421 16:37:25.458782 135347584011392 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. I0421 16:37:25.459320 135347584011392 max_utils.py:194] tensorboardX not available; using no-op SummaryWriter. I0421 16:37:25.459471 135347584011392 metric_logger.py:301] number parameters: 1.104 billion I0421 16:37:29.403737 135347584011392 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0421 16:37:29.525249 135347584011392 checkpointing.py:798] Waited 0.12150192260742188 seconds for step 0 to finish before starting checkpointing. I0421 16:37:29.525722 135347584011392 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0421 16:37:29.525880 135347584011392 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 0 I0421 16:37:29.526294 135347584011392 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/linen_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/0. I0421 16:37:29.607434 135347584011392 signaling_client.py:373] Using ThreadSafeKeyValueSignalingClient I0421 16:37:29.695709 135347584011392 jax_array_handlers.py:347] Scheduling D2H of 39 prioritized jax.Array. I0421 16:37:29.695795 135347584011392 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 I0421 16:37:29.702327 135255082141248 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/linen_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/0 I0421 16:37:30.460232 135347584011392 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.764913s I0421 16:37:30.460667 135347584011392 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 14.486 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 851 milliseconds) (per-host) I0421 16:37:30.460726 135347584011392 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 0.852018s (batch_requests_ready=0.082978s, total_serialization_initiated=0.768754s, others=0.000286s) I0421 16:37:30.460798 135347584011392 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.852884s (all_items=0.000023s, per_item={'items': '0.00002289'}, temp_paths=0.852861) I0421 16:37:30.461638 135255019226688 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0421 16:37:30.461761 135347584011392 async_checkpointer.py:561] Finished blocking save. Time taken: 0.935836s. Continuing background save to gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/linen_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/0. I0421 16:37:30.462009 135347584011392 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0421 16:37:30.462286 135347584011392 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/linen_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776789449.525708, 'wait_for_prev_duration_secs': 4.6253204345703125e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776789449.5259006, 'checkpointer_blocking_duration_secs': 0.9360036849975586, 'get_old_steps_start_time': 1776789450.4619296, 'get_old_steps_duration_secs': 3.457069396972656e-05, 'checkpoint_manager_blocking_start_time': 1776789449.5256166, 'checkpoint_manager_blocking_duration_secs': 0.9366393089294434} I0421 16:37:30.462374 135347584011392 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0421 16:37:30.462422 135347584011392 max_utils.py:750] Memstats: After params initialized: I0421 16:37:30.462512 135347584011392 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_0(process=0,(0,0,0,0)) I0421 16:37:30.462538 135347584011392 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_1(process=0,(1,0,0,0)) I0421 16:37:30.462558 135347584011392 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_2(process=0,(0,1,0,0)) I0421 16:37:30.462577 135347584011392 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_3(process=0,(1,1,0,0)) I0421 16:37:30.462594 135347584011392 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_4(process=0,(0,2,0,0)) I0421 16:37:30.462612 135347584011392 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_5(process=0,(1,2,0,0)) I0421 16:37:30.462629 135347584011392 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_6(process=0,(0,3,0,0)) I0421 16:37:30.462647 135347584011392 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_7(process=0,(1,3,0,0)) I0421 16:37:30.484913 135255071655488 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/linen_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/0/items I0421 16:37:30.621014 135255040198208 checkpoint.py:188] Wrote Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776789450389915197, 'commit_timestamp_nsecs': None, 'custom_metadata': {}}, json={"item_handlers": null, "metrics": {}, "performance_metrics": {}, "init_timestamp_nsecs": 1776789450389915197, "commit_timestamp_nsecs": null, "custom_metadata": {}} to gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/linen_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/0/_CHECKPOINT_METADATA I0421 16:37:30.621294 135255092627008 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0421 16:37:30.892756 135347584011392 metric_logger.py:196] completed step: 0, seconds: 3.944, TFLOP/s/device: 3.445, Tokens/s/device: 519.305, total_weights: 13328, loss: 10.828, lm_loss: 10.828, perplexity: 50404.086 I0421 16:37:30.893772 135347584011392 metric_logger.py:281] To see full metrics 'tensorboard --logdir=gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/linen_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/tensorboard/' I0421 16:37:31.008757 135347584011392 metric_logger.py:196] completed step: 1, seconds: 1.487, TFLOP/s/device: 9.138, Tokens/s/device: 1377.403, total_weights: 12332, loss: 10.828, lm_loss: 10.828, perplexity: 50391.758 I0421 16:37:31.021780 1611508 google_auth_provider.cc:149] Using credentials at ~/.config/gcloud/application_default_credentials.json I0421 16:37:31.021862 1611508 google_auth_provider.cc:156] Using OAuth2 AuthProvider I0421 16:37:31.126513 135347584011392 metric_logger.py:196] completed step: 2, seconds: 0.010, TFLOP/s/device: 1390.557, Tokens/s/device: 209599.836, total_weights: 15161, loss: 9.823, lm_loss: 9.823, perplexity: 18444.867 I0421 16:37:32.038318 135255061169728 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_20260421_161934/linen_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/0/items/array_metadatas/process_0 I0421 16:37:34.488804 135347584011392 train.py:723] Completed eval step 0 I0421 16:37:34.530539 135347584011392 train.py:723] Completed eval step 1 I0421 16:37:34.535788 135347584011392 metric_logger.py:216] eval metrics after step: 4, loss=8.979, perplexity=7936.996, total_weights=26703.0 I0421 16:37:34.536318 135347584011392 metric_logger.py:196] completed step: 3, seconds: 0.127, TFLOP/s/device: 106.799, Tokens/s/device: 16097.845, total_weights: 13327, loss: 9.405, lm_loss: 9.405, perplexity: 12149.331 I0421 16:37:51.191070 135347584011392 metric_logger.py:196] completed step: 4, seconds: 0.108, TFLOP/s/device: 126.270, Tokens/s/device: 19032.750, total_weights: 11939, loss: 9.045, lm_loss: 9.045, perplexity: 8471.842 I0421 16:37:51.202180 135347584011392 metric_logger.py:196] completed step: 5, seconds: 3.409, TFLOP/s/device: 3.986, Tokens/s/device: 600.749, total_weights: 15502, loss: 8.953, lm_loss: 8.953, perplexity: 7728.546 I0421 16:37:51.319123 135347584011392 metric_logger.py:196] completed step: 6, seconds: 16.656, TFLOP/s/device: 0.816, Tokens/s/device: 122.956, total_weights: 13864, loss: 8.775, lm_loss: 8.775, perplexity: 6468.536 I0421 16:37:51.436712 135347584011392 metric_logger.py:196] completed step: 7, seconds: 0.007, TFLOP/s/device: 2058.344, Tokens/s/device: 310256.022, total_weights: 12988, loss: 8.688, lm_loss: 8.688, perplexity: 5928.887 I0421 16:37:52.108635 135347584011392 train.py:723] Completed eval step 0 I0421 16:37:52.149190 135347584011392 train.py:723] Completed eval step 1 I0421 16:37:52.151926 135347584011392 metric_logger.py:216] eval metrics after step: 9, loss=8.653, perplexity=5725.923, total_weights=26703.0 I0421 16:37:52.152322 135347584011392 metric_logger.py:196] completed step: 8, seconds: 0.118, TFLOP/s/device: 115.138, Tokens/s/device: 17354.903, total_weights: 13820, loss: 8.740, lm_loss: 8.740, perplexity: 6250.123 I0421 16:37:52.154173 135347584011392 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0421 16:37:52.154684 135347584011392 checkpointing.py:798] Waited 0.0005147457122802734 seconds for step 9 to finish before starting checkpointing. I0421 16:37:52.154992 135347584011392 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0421 16:38:07.697259 135255082141248 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 36.673669s (commit=36.183261s, array_metadata_write=0.490408s) I0421 16:38:07.698337 135255019226688 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 331.765 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 38 seconds) (per-host) I0421 16:38:07.698408 135255019226688 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 37.236584s. I0421 16:38:07.941687 135255019226688 checkpoint.py:228] Read Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776789450389915197, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} from gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/linen_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/0/_CHECKPOINT_METADATA I0421 16:38:08.133136 135255019226688 array_metadata_store.py:367] [process=0][thread=async_save] Skipped cross-host ArrayMetadata validation because only one process is found: process_index=0. I0421 16:38:08.332057 135255040198208 checkpoint.py:247] Updated Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776789450389915197, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} to gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/linen_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/0/_CHECKPOINT_METADATA I0421 16:38:08.540414 135255019226688 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389). I0421 16:38:08.541100 135255019226688 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.558321s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/linen_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/0/items I0421 16:38:08.541798 135255019226688 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/linen_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/0/items I0421 16:38:08.785357 135255019226688 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/linen_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/0 I0421 16:38:09.466142 135255019226688 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_20260421_161934/linen_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/0`. I0421 16:38:09.466817 135255019226688 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 39.940899s. directory=gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/linen_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/0 I0421 16:38:09.466910 135255019226688 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 39.005091s. I0421 16:38:09.467122 135255092627008 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0421 16:38:09.467240 135255092627008 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0421 16:38:09.467307 135255092627008 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0421 16:38:09.467370 135255092627008 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0421 16:38:09.467535 135347584011392 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. W0421 16:38:09.467669 135347584011392 checkpoint_manager.py:1441] Waiting for previous save to complete took 17.312702 seconds. If this number is high, consider checkpointing less frequently. I0421 16:38:09.468930 135347584011392 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 9 I0421 16:38:09.469285 135347584011392 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/linen_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/9. I0421 16:38:09.637300 135347584011392 jax_array_handlers.py:347] Scheduling D2H of 39 prioritized jax.Array. I0421 16:38:09.637401 135347584011392 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 I0421 16:38:09.647562 135255092627008 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/linen_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/9 I0421 16:38:10.363227 135255082141248 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/linen_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/9/items I0421 16:38:24.645347 135347584011392 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 15.008488s I0421 16:38:24.650009 135347584011392 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 836.837 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 15 seconds) (per-host) I0421 16:38:24.650089 135347584011392 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 15.100760s (batch_requests_ready=0.084701s, total_serialization_initiated=15.011495s, others=0.004564s) I0421 16:38:24.650169 135347584011392 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 15.101309s (all_items=0.000026s, per_item={'items': '0.00002551'}, temp_paths=15.101284) I0421 16:38:24.651621 135255092627008 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0421 16:38:24.651713 135347584011392 async_checkpointer.py:561] Finished blocking save. Time taken: 15.182732s. Continuing background save to gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/linen_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/9. I0421 16:38:24.651933 135347584011392 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0421 16:38:24.652126 135255019226688 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0421 16:38:24.652229 135347584011392 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/linen_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776789472.1549335, 'wait_for_prev_duration_secs': 17.312702178955078, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776789489.468957, 'checkpointer_blocking_duration_secs': 15.182868003845215, 'get_old_steps_start_time': 1776789504.6518419, 'get_old_steps_duration_secs': 4.839897155761719e-05, 'checkpoint_manager_blocking_start_time': 1776789472.1548533, 'checkpoint_manager_blocking_duration_secs': 32.497349977493286} I0421 16:38:24.652352 135347584011392 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0421 16:38:24.652386 135347584011392 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0421 16:38:25.416421 135255061169728 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_20260421_161934/linen_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/9/items/array_metadatas/process_0 I0421 16:39:06.925241 135255082141248 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 42.274524s (commit=41.786199s, array_metadata_write=0.488325s) I0421 16:39:06.926412 135255092627008 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 220.241 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 57 seconds) (per-host) I0421 16:39:06.926483 135255092627008 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.274722s. I0421 16:39:07.387413 135255092627008 array_metadata_store.py:367] [process=0][thread=async_save] Skipped cross-host ArrayMetadata validation because only one process is found: process_index=0. I0421 16:39:07.825585 135255092627008 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389). I0421 16:39:07.826309 135255092627008 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.588284s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/linen_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/9/items I0421 16:39:07.827000 135255092627008 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/linen_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/9/items I0421 16:39:08.090519 135255092627008 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/linen_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/9 I0421 16:39:08.776619 135255092627008 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_20260421_161934/linen_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/9`. I0421 16:39:08.777299 135255092627008 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 59.308324s. directory=gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/linen_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/9 I0421 16:39:08.777389 135255092627008 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 44.125630s. I0421 16:39:08.777616 135255019226688 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0421 16:39:08.777728 135255019226688 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0421 16:39:08.777807 135255019226688 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0421 16:39:08.777856 135255019226688 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0421 16:39:08.778773 135347584011392 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. I0421 16:39:08.779650 135347584011392 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0421 16:39:08.780727 135347584011392 metric_logger.py:196] completed step: 9, seconds: 0.118, TFLOP/s/device: 115.322, Tokens/s/device: 17382.595, 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
2026-04-21 17:58:43.941463: E external/local_xla/xla/stream_executor/cuda/cuda_fft.cc:467] Unable to register cuFFT factory: Attempting to register factory for plugin cuFFT when one has already been registered WARNING: All log messages before absl::InitializeLog() is called are written to STDERR E0000 00:00:1776794323.951641 1684627 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered E0000 00:00:1776794323.954730 1684627 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered W0000 00:00:1776794323.964778 1684627 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776794323.964794 1684627 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776794323.964796 1684627 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776794323.964797 1684627 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. Unrecognized keys in `rope_scaling` for 'rope_type'='yarn': {'rope_theta'} `rope_scaling`'s factor field must be a float >= 1, got 40 `rope_scaling`'s beta_fast field must be a float, got 32 `rope_scaling`'s beta_slow field must be a float, got 1 Unrecognized keys in `rope_scaling` for 'rope_type'='yarn': {'rope_theta'} Unrecognized keys in `rope_scaling` for 'rope_type'='yarn': {'rope_theta'} Unrecognized keys in `rope_scaling` for 'rope_type'='yarn': {'rope_theta'} 2026-04-21 17:58:47.645168: 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) I0421 17:58:47.782958 129142307708032 max_utils.py:238] Skipping jax distributed system due to skip_jax_distributed_system=True flag. I0421 17:59:17.516319 129142307708032 max_utils.py:800] System Information: Jax Version: 0.8.1 I0421 17:59:17.516583 129142307708032 max_utils.py:801] System Information: Jaxlib Version: 0.8.1 I0421 17:59:17.516629 129142307708032 max_utils.py:802] System Information: Jax Backend: PJRT C API TFRT TPU v6 lite Built on Nov 12 2025 14:16:36 (1762985796) cl/831091709 I0421 17:59:17.516659 129142307708032 train_utils.py:378] WARNING: 'dataset_path' might be pointing your local file system I0421 17:59:17.516842 129142307708032 train.py:806] [DECOUPLED NO-OP] skipping cloud diagnostics wrapper. I0421 17:59:18.147281 129142307708032 maxtext_utils.py:1732] Num_devices: 8, shape (1, 1, 1, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0421 17:59:18.247494 129142307708032 checkpointing.py:688] Setting up checkpoint logger... I0421 17:59:18.247608 129142307708032 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0421 17:59:18.247648 129142307708032 pytree_checkpoint_handler.py:577] save_device_host_concurrent_bytes=None I0421 17:59:18.247821 129142307708032 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 0x7573ffbae270>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0421 17:59:20.687746 129142307708032 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0421 17:59:20.687943 129142307708032 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 0x7572539a9c10>}, handler_registry=None I0421 17:59:20.688183 129142307708032 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7572539a9c10>` 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`. I0421 17:59:20.688225 129142307708032 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x75725395d9a0>` 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`. I0421 17:59:20.688254 129142307708032 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 0x7572539a9c10>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7572539a9c10>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x75725395d9a0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x75725395d9a0>}). I0421 17:59:20.688534 129142307708032 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.28 I0421 17:59:20.688588 129142307708032 async_checkpointer.py:177] [process=0][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>.<lambda> at 0x757254dacc20> timeout: 600 secs and primary_host=0 for async checkpoint writes I0421 17:59:20.811501 129142307708032 checkpoint_manager.py:1788] Found 0 checkpoint steps in gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints I0421 17:59:20.811740 129142307708032 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_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7572539abc20> I0421 17:59:20.811823 129142307708032 checkpointing.py:302] Checkpoint manager created! I0421 17:59:20.903606 129142307708032 dataset_info.py:707] Load dataset info from tests/assets/local_datasets/c4_en_dataset_minimal/c4/en/3.1.0 I0421 17:59:20.906571 129142307708032 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. I0421 17:59:20.958677 129142307708032 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 I0421 17:59:20.981415 129142307708032 tokenizer.py:245] Tokenizer path: src/maxtext/assets/tokenizers/tokenizer.llama2 I0421 17:59:20.981480 129142307708032 tokenizer.py:187] Loading sentencepiece tokenizer: src/maxtext/assets/tokenizers/tokenizer.llama2 I0421 17:59:21.537913 129142307708032 dataset_info.py:707] Load dataset info from tests/assets/local_datasets/c4_en_dataset_minimal/c4/en/3.1.0 I0421 17:59:21.539590 129142307708032 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. I0421 17:59:21.555801 129142307708032 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 I0421 17:59:21.558436 129142307708032 tokenizer.py:245] Tokenizer path: src/maxtext/assets/tokenizers/tokenizer.llama2 I0421 17:59:21.558486 129142307708032 tokenizer.py:187] Loading sentencepiece tokenizer: src/maxtext/assets/tokenizers/tokenizer.llama2 I0421 17:59:21.914984 129142307708032 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0421 17:59:21.915111 129142307708032 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. [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 I0421 17:59:22.796750 129142307708032 nnx_decoders.py:465] nnx_decoders/carry Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0421 17:59:22.796988 129142307708032 nnx_decoders.py:465] nnx_decoders/carry Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0421 17:59:22.802404 129142307708032 nnx_decoders.py:465] Unknown Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0421 17:59:22.802558 129142307708032 nnx_decoders.py:465] Unknown Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0421 17:59:22.815900 129142307708032 attentions.py:1088] attentions/inputs_q Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0421 17:59:22.815982 129142307708032 attentions.py:1088] attentions/inputs_q Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0421 17:59:22.828549 129142307708032 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0421 17:59:22.828630 129142307708032 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0421 17:59:22.849466 129142307708032 attentions.py:1154] attentions/query Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0421 17:59:22.849558 129142307708032 attentions.py:1154] attentions/query Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0421 17:59:22.862271 129142307708032 attentions.py:1155] attentions/key Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0421 17:59:22.862354 129142307708032 attentions.py:1155] attentions/key Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0421 17:59:22.875078 129142307708032 attentions.py:1156] attentions/value Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0421 17:59:22.875161 129142307708032 attentions.py:1156] attentions/value Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0421 17:59:22.897064 129142307708032 attentions.py:1198] attentions/out Logical: bfloat16[8,2048,16,128]..................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0421 17:59:22.897161 129142307708032 attentions.py:1198] attentions/out Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0421 17:59:22.915120 129142307708032 linears.py:525] linears/x Logical: bfloat16[8,2048,7168]....................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0421 17:59:22.915209 129142307708032 linears.py:525] linears/x Physical: bfloat16[8,2048,7168]....................................... ('fsdp', None, None). I0421 17:59:24.017564 129142307708032 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. I0421 17:59:24.021185 129142307708032 max_utils.py:194] tensorboardX not available; using no-op SummaryWriter. I0421 17:59:24.022628 129142307708032 metric_logger.py:301] number parameters: 1.104 billion I0421 17:59:29.001352 129142307708032 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0421 17:59:29.121756 129142307708032 checkpointing.py:798] Waited 0.12037944793701172 seconds for step 0 to finish before starting checkpointing. I0421 17:59:29.122276 129142307708032 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0421 17:59:29.122425 129142307708032 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 0 I0421 17:59:29.122837 129142307708032 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/0. I0421 17:59:29.212773 129142307708032 signaling_client.py:373] Using ThreadSafeKeyValueSignalingClient I0421 17:59:29.301623 129142307708032 jax_array_handlers.py:347] Scheduling D2H of 69 prioritized jax.Array. I0421 17:59:29.301777 129049758271040 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/0 I0421 17:59:29.302173 129142307708032 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 I0421 17:59:29.998943 129049747785280 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/0/items I0421 17:59:30.158835 129049716328000 checkpoint.py:188] Wrote Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776794369915073599, 'commit_timestamp_nsecs': None, 'custom_metadata': {}}, json={"item_handlers": null, "metrics": {}, "performance_metrics": {}, "init_timestamp_nsecs": 1776794369915073599, "commit_timestamp_nsecs": null, "custom_metadata": {}} to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/0/_CHECKPOINT_METADATA I0421 17:59:30.477561 129142307708032 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 1.177590s I0421 17:59:30.478133 129142307708032 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 9.768 GiB/s (total gbytes: 12.3 GiB) (time elapsed: a second) (per-host) I0421 17:59:30.478192 129142307708032 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 1.263516s (batch_requests_ready=0.077805s, total_serialization_initiated=1.185293s, others=0.000418s) I0421 17:59:30.478268 129142307708032 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.264935s (all_items=0.000019s, per_item={'items': '0.00001931'}, temp_paths=1.264915) I0421 17:59:30.479486 129049695356480 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0421 17:59:30.479619 129142307708032 async_checkpointer.py:561] Finished blocking save. Time taken: 1.357148s. Continuing background save to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/0. I0421 17:59:30.479869 129142307708032 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0421 17:59:30.480082 129049768756800 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0421 17:59:30.480185 129142307708032 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776794369.1222456, 'wait_for_prev_duration_secs': 5.984306335449219e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776794369.1224465, 'checkpointer_blocking_duration_secs': 1.3573188781738281, 'get_old_steps_start_time': 1776794370.4797897, 'get_old_steps_duration_secs': 2.7179718017578125e-05, 'checkpoint_manager_blocking_start_time': 1776794369.1221611, 'checkpoint_manager_blocking_duration_secs': 1.3579862117767334} I0421 17:59:30.480340 129142307708032 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0421 17:59:30.480412 129142307708032 max_utils.py:750] Memstats: After params initialized: I0421 17:59:30.480532 129142307708032 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_0(process=0,(0,0,0,0)) I0421 17:59:30.480559 129142307708032 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_1(process=0,(1,0,0,0)) I0421 17:59:30.480580 129142307708032 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_2(process=0,(0,1,0,0)) I0421 17:59:30.480599 129142307708032 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_3(process=0,(1,1,0,0)) I0421 17:59:30.480618 129142307708032 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_4(process=0,(0,2,0,0)) I0421 17:59:30.480635 129142307708032 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_5(process=0,(1,2,0,0)) I0421 17:59:30.480652 129142307708032 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_6(process=0,(0,3,0,0)) I0421 17:59:30.480668 129142307708032 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_7(process=0,(1,3,0,0)) I0421 17:59:30.547647 1687274 google_auth_provider.cc:149] Using credentials at ~/.config/gcloud/application_default_credentials.json I0421 17:59:30.547730 1687274 google_auth_provider.cc:156] Using OAuth2 AuthProvider I0421 17:59:30.868298 129142307708032 metric_logger.py:196] completed step: 0, seconds: 4.977, TFLOP/s/device: 2.730, Tokens/s/device: 411.464, total_weights: 13328, loss: 10.880, lm_loss: 10.880, perplexity: 53108.402 I0421 17:59:30.869209 129142307708032 metric_logger.py:281] To see full metrics 'tensorboard --logdir=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/tensorboard/' I0421 17:59:30.981814 129142307708032 metric_logger.py:196] completed step: 1, seconds: 1.863, TFLOP/s/device: 7.293, Tokens/s/device: 1099.327, total_weights: 12332, loss: 10.862, lm_loss: 10.862, perplexity: 52152.828 I0421 17:59:31.099147 129142307708032 metric_logger.py:196] completed step: 2, seconds: 0.021, TFLOP/s/device: 648.829, Tokens/s/device: 97798.577, total_weights: 15161, loss: 9.926, lm_loss: 9.926, perplexity: 20464.070 I0421 17:59:31.749403 129049737299520 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_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/0/items/array_metadatas/process_0 I0421 17:59:37.297073 129142307708032 train.py:723] Completed eval step 0 I0421 17:59:37.340779 129142307708032 train.py:723] Completed eval step 1 I0421 17:59:37.346113 129142307708032 metric_logger.py:216] eval metrics after step: 4, loss=8.926, perplexity=7524.814, total_weights=26703.0 I0421 17:59:37.346647 129142307708032 metric_logger.py:196] completed step: 3, seconds: 0.107, TFLOP/s/device: 127.341, Tokens/s/device: 19194.182, total_weights: 13327, loss: 9.396, lm_loss: 9.396, perplexity: 12037.986 I0421 17:59:52.758758 129142307708032 metric_logger.py:196] completed step: 4, seconds: 0.117, TFLOP/s/device: 115.750, Tokens/s/device: 17447.160, total_weights: 11939, loss: 9.005, lm_loss: 9.005, perplexity: 8141.998 I0421 17:59:52.778392 129142307708032 metric_logger.py:196] completed step: 5, seconds: 6.247, TFLOP/s/device: 2.175, Tokens/s/device: 327.844, total_weights: 15502, loss: 8.861, lm_loss: 8.861, perplexity: 7054.059 I0421 17:59:52.894363 129142307708032 metric_logger.py:196] completed step: 6, seconds: 15.421, TFLOP/s/device: 0.881, Tokens/s/device: 132.808, total_weights: 13864, loss: 8.738, lm_loss: 8.738, perplexity: 6233.198 I0421 17:59:53.012491 129142307708032 metric_logger.py:196] completed step: 7, seconds: 0.013, TFLOP/s/device: 1029.328, Tokens/s/device: 155151.515, total_weights: 12988, loss: 8.651, lm_loss: 8.651, perplexity: 5718.487 I0421 17:59:53.707201 129142307708032 train.py:723] Completed eval step 0 I0421 17:59:53.747874 129142307708032 train.py:723] Completed eval step 1 I0421 17:59:53.751453 129142307708032 metric_logger.py:216] eval metrics after step: 9, loss=8.623, perplexity=5557.299, total_weights=26703.0 I0421 17:59:53.751935 129142307708032 metric_logger.py:196] completed step: 8, seconds: 0.112, TFLOP/s/device: 121.515, Tokens/s/device: 18316.132, total_weights: 13820, loss: 8.671, lm_loss: 8.671, perplexity: 5832.209 I0421 17:59:53.754936 129142307708032 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0421 17:59:53.755885 129142307708032 checkpointing.py:798] Waited 0.000949859619140625 seconds for step 9 to finish before starting checkpointing. I0421 17:59:53.756156 129142307708032 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0421 18:00:05.733314 129049705842240 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 35.182291s (commit=34.748939s, array_metadata_write=0.433352s) I0421 18:00:05.734553 129049695356480 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 346.025 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 36 seconds) (per-host) I0421 18:00:05.734611 129049695356480 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 35.254934s. I0421 18:00:05.978978 129049695356480 checkpoint.py:228] Read Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776794369915073599, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} from gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/0/_CHECKPOINT_METADATA I0421 18:00:06.170627 129049695356480 array_metadata_store.py:367] [process=0][thread=async_save] Skipped cross-host ArrayMetadata validation because only one process is found: process_index=0. I0421 18:00:06.384856 129049716328000 checkpoint.py:247] Updated Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776794369915073599, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/0/_CHECKPOINT_METADATA I0421 18:00:06.586705 129049695356480 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389). I0421 18:00:06.586910 129049695356480 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.563758s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/0/items I0421 18:00:06.587675 129049695356480 atomicity.py:608] Finalizing gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/0/items I0421 18:00:06.835011 129049695356480 atomicity.py:608] Finalizing gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/0 I0421 18:00:07.518141 129049695356480 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_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/0`. I0421 18:00:07.518887 129049695356480 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 38.396429s. directory=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/0 I0421 18:00:07.518971 129049695356480 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 37.039294s. I0421 18:00:07.519121 129049768756800 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0421 18:00:07.519173 129049768756800 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0421 18:00:07.519225 129049768756800 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0421 18:00:07.519271 129049768756800 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0421 18:00:07.519415 129142307708032 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. W0421 18:00:07.519569 129142307708032 checkpoint_manager.py:1441] Waiting for previous save to complete took 13.763419 seconds. If this number is high, consider checkpointing less frequently. I0421 18:00:07.520586 129142307708032 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 9 I0421 18:00:07.520922 129142307708032 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/9. I0421 18:00:07.701500 129049768756800 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/9 I0421 18:00:07.721270 129142307708032 jax_array_handlers.py:347] Scheduling D2H of 69 prioritized jax.Array. I0421 18:00:07.721376 129142307708032 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 I0421 18:00:08.426614 129049632441920 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/9/items I0421 18:00:20.319363 129142307708032 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 12.599438s I0421 18:00:20.325938 129142307708032 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 993.917 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 12 seconds) (per-host) I0421 18:00:20.326000 129142307708032 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 12.714217s (batch_requests_ready=0.100974s, total_serialization_initiated=12.606791s, others=0.006451s) I0421 18:00:20.326106 129142307708032 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 12.714857s (all_items=0.000015s, per_item={'items': '0.00001502'}, temp_paths=12.714842) I0421 18:00:20.327528 129049768756800 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0421 18:00:20.327614 129142307708032 async_checkpointer.py:561] Finished blocking save. Time taken: 12.806981s. Continuing background save to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/9. I0421 18:00:20.327810 129142307708032 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0421 18:00:20.327973 129049695356480 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0421 18:00:20.328092 129142307708032 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776794393.7561126, 'wait_for_prev_duration_secs': 13.763418912887573, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776794407.5206127, 'checkpointer_blocking_duration_secs': 12.807109117507935, 'get_old_steps_start_time': 1776794420.3277392, 'get_old_steps_duration_secs': 3.0279159545898438e-05, 'checkpoint_manager_blocking_start_time': 1776794393.7560732, 'checkpoint_manager_blocking_duration_secs': 26.571993350982666} I0421 18:00:20.328221 129142307708032 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0421 18:00:20.328254 129142307708032 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0421 18:00:21.118530 129047491249728 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_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/9/items/array_metadatas/process_0 I0421 18:01:14.071533 129049737299520 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 53.744748s (commit=53.220269s, array_metadata_write=0.524478s) I0421 18:01:14.072951 129049768756800 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 190.138 MiB/s (total gbytes: 12.3 GiB) (time elapsed: a minute) (per-host) I0421 18:01:14.073093 129049768756800 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 53.745433s. I0421 18:01:14.499278 129049768756800 array_metadata_store.py:367] [process=0][thread=async_save] Skipped cross-host ArrayMetadata validation because only one process is found: process_index=0. I0421 18:01:14.970229 129049768756800 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389). I0421 18:01:14.971068 129049768756800 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.618137s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/9/items I0421 18:01:14.971830 129049768756800 atomicity.py:608] Finalizing gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/9/items I0421 18:01:15.220630 129049768756800 atomicity.py:608] Finalizing gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/9 I0421 18:01:15.963443 129049768756800 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_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/9`. I0421 18:01:15.964243 129049768756800 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 68.443616s. directory=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_07_eval/checkpoints/9 I0421 18:01:15.964323 129049768756800 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 55.636666s. I0421 18:01:15.964585 129049695356480 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0421 18:01:15.964698 129049695356480 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0421 18:01:15.964757 129049695356480 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0421 18:01:15.964802 129049695356480 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0421 18:01:15.964996 129142307708032 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. I0421 18:01:15.965196 129142307708032 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0421 18:01:15.966007 129142307708032 metric_logger.py:196] completed step: 9, seconds: 0.120, TFLOP/s/device: 113.309, Tokens/s/device: 17079.191, total_weights: 12300, loss: 8.668, lm_loss: 8.668, perplexity: 5810.989 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops