2026-04-16 05:07:35.684765: 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 05:07:35.801635 131859403328640 max_utils.py:238] Skipping jax distributed system due to skip_jax_distributed_system=True flag. I0416 05:08:30.583575 131859403328640 max_utils.py:800] System Information: Jax Version: 0.9.2 I0416 05:08:30.583687 131859403328640 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0416 05:08:30.583722 131859403328640 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 05:08:30.583747 131859403328640 train_utils.py:364] WARNING: 'dataset_path' might be pointing your local file system I0416 05:08:30.583823 131859403328640 train.py:818] [DECOUPLED NO-OP] skipping cloud diagnostics wrapper. W0416 05:08:30.677323 3721996 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0416 05:08:31.080383 131859403328640 maxtext_utils.py:1687] Num_devices: 8, shape (1, 1, 1, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0416 05:08:31.460157 131859403328640 checkpointing.py:688] Setting up checkpoint logger... I0416 05:08:31.460256 131859403328640 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0416 05:08:31.460298 131859403328640 pytree_checkpoint_handler.py:577] save_device_host_concurrent_bytes=None I0416 05:08:31.460496 131859403328640 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 0x77ec51ff5940>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0416 05:08:33.807142 131859403328640 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0416 05:08:33.807320 131859403328640 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 0x77e5d4d2e1e0>}, handler_registry=None I0416 05:08:33.807579 131859403328640 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x77e5d4d2e1e0>` 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 05:08:33.807618 131859403328640 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x77e78691df70>` 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 05:08:33.807646 131859403328640 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 0x77e5d4d2e1e0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x77e5d4d2e1e0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x77e78691df70>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x77e78691df70>}). I0416 05:08:33.808125 131859403328640 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.28 I0416 05:08:33.808175 131859403328640 async_checkpointer.py:177] [process=0][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>.<lambda> at 0x77e5d518bd80> timeout: 600 secs and primary_host=0 for async checkpoint writes I0416 05:08:33.927166 131859403328640 checkpoint_manager.py:1788] Found 0 checkpoint steps in gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints I0416 05:08:33.927391 131859403328640 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_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x77e5d4d2e630> I0416 05:08:33.927471 131859403328640 checkpointing.py:302] Checkpoint manager created! I0416 05:08:34.010318 131859403328640 dataset_info.py:707] Load dataset info from tests/assets/local_datasets/c4_en_dataset_minimal/c4/en/3.1.0 I0416 05:08:34.013262 131859403328640 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 05:08:34.066931 131859403328640 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 05:08:34.098668 131859403328640 tokenizer.py:245] Tokenizer path: src/maxtext/assets/tokenizers/tokenizer.llama2 I0416 05:08:34.098733 131859403328640 tokenizer.py:187] Loading sentencepiece tokenizer: src/maxtext/assets/tokenizers/tokenizer.llama2 I0416 05:08:35.386383 131859403328640 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0416 05:08:35.386487 131859403328640 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. W0416 05:08:35.735472 3721996 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 05:08:36.226458 131859403328640 nnx_decoders.py:465] nnx_decoders/carry Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0416 05:08:36.226540 131859403328640 nnx_decoders.py:465] nnx_decoders/carry Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0416 05:08:36.231418 131859403328640 nnx_decoders.py:465] Unknown Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0416 05:08:36.231466 131859403328640 nnx_decoders.py:465] Unknown Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0416 05:08:36.246748 131859403328640 attentions.py:1088] attentions/inputs_q Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0416 05:08:36.246796 131859403328640 attentions.py:1088] attentions/inputs_q Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0416 05:08:36.261435 131859403328640 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0416 05:08:36.261485 131859403328640 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0416 05:08:36.315957 131859403328640 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 05:08:36.316036 131859403328640 attentions.py:1154] attentions/query Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0416 05:08:36.330697 131859403328640 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 05:08:36.330746 131859403328640 attentions.py:1155] attentions/key Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0416 05:08:36.345486 131859403328640 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 05:08:36.345537 131859403328640 attentions.py:1156] attentions/value Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0416 05:08:36.373790 131859403328640 attentions.py:1197] attentions/out Logical: bfloat16[8,2048,16,128]..................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0416 05:08:36.373852 131859403328640 attentions.py:1197] attentions/out Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0416 05:08:36.427941 131859403328640 linears.py:525] linears/x Logical: bfloat16[8,2048,7168]....................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0416 05:08:36.428008 131859403328640 linears.py:525] linears/x Physical: bfloat16[8,2048,7168]....................................... ('fsdp', None, None). I0416 05:08:48.972539 131859403328640 max_utils.py:791] Total memory size: 3.5 GB, Output size: 1.5 GB, Temp size: 1.9 GB, Argument size: 1.5 GB, Host temp size: 0.0 GB. I0416 05:08:48.973425 131859403328640 max_utils.py:194] tensorboardX not available; using no-op SummaryWriter. I0416 05:08:48.977106 131859403328640 metric_logger.py:289] number parameters: 1.104 billion I0416 05:09:03.942496 131859403328640 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0416 05:09:04.066454 131859403328640 checkpointing.py:798] Waited 0.12395930290222168 seconds for step 0 to finish before starting checkpointing. I0416 05:09:04.067075 131859403328640 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0416 05:09:04.067268 131859403328640 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 0 I0416 05:09:04.067799 131859403328640 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints/0. I0416 05:09:04.158871 131859403328640 signaling_client.py:373] Using ThreadSafeKeyValueSignalingClient I0416 05:09:04.254585 131745091421760 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints/0 I0416 05:09:04.276583 131859403328640 jax_array_handlers.py:347] Scheduling D2H of 153 prioritized jax.Array. I0416 05:09:04.276686 131859403328640 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 05:09:04.980679 131745080936000 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints/0/items I0416 05:09:05.136701 131745041090112 checkpoint.py:188] Wrote Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776316144888126034, 'commit_timestamp_nsecs': None, 'custom_metadata': {}}, json={"item_handlers": null, "metrics": {}, "performance_metrics": {}, "init_timestamp_nsecs": 1776316144888126034, "commit_timestamp_nsecs": null, "custom_metadata": {}} to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints/0/_CHECKPOINT_METADATA I0416 05:09:05.514412 3725120 google_auth_provider.cc:149] Using credentials at ~/.config/gcloud/application_default_credentials.json I0416 05:09:05.514465 3725120 google_auth_provider.cc:156] Using OAuth2 AuthProvider W0416 05:09:06.046174 3721996 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 05:09:06.054261 3721996 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 05:09:06.062168 3721996 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 05:09:06.067488 3721996 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 05:09:06.072579 3721996 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 05:09:06.077568 3721996 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 05:09:06.082622 3721996 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 05:09:06.087597 3721996 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0416 05:09:06.512003 131859403328640 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 2.237173s I0416 05:09:06.523953 131859403328640 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 5.223 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 2 seconds) (per-host) I0416 05:09:06.524018 131859403328640 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 2.363057s (batch_requests_ready=0.096177s, total_serialization_initiated=2.255048s, others=0.011832s) I0416 05:09:06.524128 131859403328640 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 2.364753s (all_items=0.000031s, per_item={'items': '0.00003052'}, temp_paths=2.364722) I0416 05:09:06.525557 131744967689792 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0416 05:09:06.525664 131859403328640 async_checkpointer.py:561] Finished blocking save. Time taken: 2.458346s. Continuing background save to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints/0. I0416 05:09:06.525861 131859403328640 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0416 05:09:06.526082 131745101907520 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0416 05:09:06.526187 131859403328640 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776316144.0670612, 'wait_for_prev_duration_secs': 4.315376281738281e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776316144.0672903, 'checkpointer_blocking_duration_secs': 2.4584875106811523, 'get_old_steps_start_time': 1776316146.525798, 'get_old_steps_duration_secs': 2.8133392333984375e-05, 'checkpoint_manager_blocking_start_time': 1776316144.0669453, 'checkpoint_manager_blocking_duration_secs': 2.459214925765991} I0416 05:09:06.526397 131859403328640 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0416 05:09:06.526462 131859403328640 max_utils.py:750] Memstats: After params initialized: I0416 05:09:06.526507 131859403328640 max_utils.py:756] Using (GB) 1.61 / 31.25 (5.152000%) on TPU_0(process=0,(0,0,0,0)) I0416 05:09:06.526533 131859403328640 max_utils.py:756] Using (GB) 1.61 / 31.25 (5.152000%) on TPU_1(process=0,(1,0,0,0)) I0416 05:09:06.526553 131859403328640 max_utils.py:756] Using (GB) 1.61 / 31.25 (5.152000%) on TPU_2(process=0,(0,1,0,0)) I0416 05:09:06.526573 131859403328640 max_utils.py:756] Using (GB) 1.61 / 31.25 (5.152000%) on TPU_3(process=0,(1,1,0,0)) I0416 05:09:06.526591 131859403328640 max_utils.py:756] Using (GB) 1.61 / 31.25 (5.152000%) on TPU_4(process=0,(0,2,0,0)) I0416 05:09:06.526608 131859403328640 max_utils.py:756] Using (GB) 1.61 / 31.25 (5.152000%) on TPU_5(process=0,(1,2,0,0)) I0416 05:09:06.526626 131859403328640 max_utils.py:756] Using (GB) 1.61 / 31.25 (5.152000%) on TPU_6(process=0,(0,3,0,0)) I0416 05:09:06.526642 131859403328640 max_utils.py:756] Using (GB) 1.61 / 31.25 (5.152000%) on TPU_7(process=0,(1,3,0,0)) W0416 05:09:06.532913 3721996 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 05:09:06.538841 3721996 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 05:09:06.544027 3721996 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0416 05:09:06.899421 131859403328640 metric_logger.py:185] completed step: 0, seconds: 14.963, TFLOP/s/device: 0.908, Tokens/s/device: 136.871, total_weights: 13328, loss: 10.885 I0416 05:09:06.900324 131859403328640 metric_logger.py:269] To see full metrics 'tensorboard --logdir=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/tensorboard/' I0416 05:09:06.998039 131859403328640 metric_logger.py:185] completed step: 1, seconds: 2.949, TFLOP/s/device: 4.608, Tokens/s/device: 694.513, total_weights: 12332, loss: 10.851 I0416 05:09:07.106705 131859403328640 metric_logger.py:185] completed step: 2, seconds: 0.038, TFLOP/s/device: 361.158, Tokens/s/device: 54437.681, total_weights: 15161, loss: 10.862 I0416 05:09:07.216095 131859403328640 metric_logger.py:185] completed step: 3, seconds: 0.082, TFLOP/s/device: 164.700, Tokens/s/device: 24825.446, total_weights: 13327, loss: 10.895 I0416 05:09:07.516591 131745059964480 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 153 array_metadata.ArrayMetadata to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints/0/items/array_metadatas/process_0 I0416 05:09:29.024491 131859403328640 metric_logger.py:185] completed step: 4, seconds: 0.109, TFLOP/s/device: 125.014, Tokens/s/device: 18843.447, total_weights: 11939, loss: 10.906 I0416 05:09:29.041901 131859403328640 metric_logger.py:185] completed step: 5, seconds: 0.109, TFLOP/s/device: 124.122, Tokens/s/device: 18709.006, total_weights: 15502, loss: 10.872 I0416 05:09:29.144874 131859403328640 metric_logger.py:185] completed step: 6, seconds: 21.809, TFLOP/s/device: 0.623, Tokens/s/device: 93.905, total_weights: 13864, loss: 10.889 I0416 05:09:29.254179 131859403328640 metric_logger.py:185] completed step: 7, seconds: 0.012, TFLOP/s/device: 1100.440, Tokens/s/device: 165870.252, total_weights: 12988, loss: 10.889 I0416 05:09:29.363489 131859403328640 metric_logger.py:185] completed step: 8, seconds: 0.104, TFLOP/s/device: 131.182, Tokens/s/device: 19773.111, total_weights: 13820, loss: 10.874 I0416 05:09:29.373857 131859403328640 checkpointing.py:794] Waiting for step 10 to finish before checkpoint... I0416 05:09:29.583784 131859403328640 checkpointing.py:798] Waited 0.20990443229675293 seconds for step 10 to finish before starting checkpointing. I0416 05:09:29.584337 131859403328640 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0416 05:09:43.755539 131744988661312 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 37.230780s (commit=36.782392s, array_metadata_write=0.448387s) I0416 05:09:43.757075 131744967689792 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 319.176 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 39 seconds) (per-host) I0416 05:09:43.757176 131744967689792 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 37.231464s. I0416 05:09:43.985429 131744967689792 checkpoint.py:228] Read Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776316144888126034, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} from gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints/0/_CHECKPOINT_METADATA I0416 05:09:44.167229 131744967689792 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 05:09:44.369033 131745041090112 checkpoint.py:247] Updated Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776316144888126034, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints/0/_CHECKPOINT_METADATA I0416 05:09:44.574812 131744967689792 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389). I0416 05:09:44.575751 131744967689792 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.544786s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints/0/items I0416 05:09:44.576402 131744967689792 atomicity.py:608] Finalizing gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints/0/items I0416 05:09:44.822138 131744967689792 atomicity.py:608] Finalizing gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints/0 I0416 05:09:45.516096 131744967689792 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_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints/0`. I0416 05:09:45.516708 131744967689792 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 41.449401s. directory=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints/0 I0416 05:09:45.516788 131744967689792 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 38.991078s. I0416 05:09:45.516987 131745101907520 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0416 05:09:45.517104 131745101907520 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0416 05:09:45.517162 131745101907520 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0416 05:09:45.517212 131745101907520 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0416 05:09:45.517337 131859403328640 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 05:09:45.517459 131859403328640 checkpoint_manager.py:1441] Waiting for previous save to complete took 15.933142 seconds. If this number is high, consider checkpointing less frequently. I0416 05:09:45.518575 131859403328640 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 10 I0416 05:09:45.518865 131859403328640 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints/10. I0416 05:09:45.698727 131745101907520 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints/10 I0416 05:09:45.719243 131859403328640 jax_array_handlers.py:347] Scheduling D2H of 153 prioritized jax.Array. I0416 05:09:45.719342 131859403328640 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 05:09:46.404019 131744957204032 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints/10/items I0416 05:09:50.567673 131859403328640 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 4.850142s I0416 05:09:50.579104 131859403328640 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.483 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 4 seconds) (per-host) I0416 05:09:50.579221 131859403328640 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 4.970665s (batch_requests_ready=0.092124s, total_serialization_initiated=4.867158s, others=0.011383s) I0416 05:09:50.579310 131859403328640 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 4.971437s (all_items=0.000017s, per_item={'items': '0.00001717'}, temp_paths=4.971420) I0416 05:09:50.580580 131744988661312 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0416 05:09:50.580661 131859403328640 async_checkpointer.py:561] Finished blocking save. Time taken: 5.062037s. Continuing background save to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints/10. I0416 05:09:50.580852 131859403328640 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=10] Starting CheckpointManager Save Finalize thread=save_finalize I0416 05:09:50.581075 131744999147072 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0416 05:09:50.581189 131859403328640 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776316169.5842886, 'wait_for_prev_duration_secs': 15.933141946792603, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776316185.5186045, 'checkpointer_blocking_duration_secs': 5.062162160873413, 'get_old_steps_start_time': 1776316190.5807831, 'get_old_steps_duration_secs': 3.0517578125e-05, 'checkpoint_manager_blocking_start_time': 1776316169.5842173, 'checkpoint_manager_blocking_duration_secs': 20.996943950653076} I0416 05:09:50.581455 131859403328640 checkpointing.py:409] Started an asynchronous checkpoint save for step 10 I0416 05:09:50.581973 131859403328640 metric_logger.py:185] completed step: 9, seconds: 0.109, TFLOP/s/device: 124.512, Tokens/s/device: 18767.812, total_weights: 12300, loss: 10.883 I0416 05:09:50.597020 131859403328640 metric_logger.py:185] completed step: 10, seconds: 0.109, TFLOP/s/device: 124.349, Tokens/s/device: 18743.250, total_weights: 13436, loss: 10.869 I0416 05:09:50.698373 131859403328640 metric_logger.py:185] completed step: 11, seconds: 21.219, TFLOP/s/device: 0.640, Tokens/s/device: 96.518, total_weights: 13817, loss: 10.862 I0416 05:09:50.807617 131859403328640 metric_logger.py:185] completed step: 12, seconds: 0.013, TFLOP/s/device: 1035.525, Tokens/s/device: 156085.664, total_weights: 12076, loss: 10.893 I0416 05:09:50.916916 131859403328640 metric_logger.py:185] completed step: 13, seconds: 0.103, TFLOP/s/device: 131.829, Tokens/s/device: 19870.762, total_weights: 11048, loss: 10.908 I0416 05:09:51.026329 131859403328640 metric_logger.py:185] completed step: 14, seconds: 0.109, TFLOP/s/device: 124.853, Tokens/s/device: 18819.205, total_weights: 14267, loss: 10.890 I0416 05:09:51.135758 131859403328640 metric_logger.py:185] completed step: 15, seconds: 0.109, TFLOP/s/device: 124.177, Tokens/s/device: 18717.384, total_weights: 13004, loss: 10.887 I0416 05:09:51.245033 131859403328640 metric_logger.py:185] completed step: 16, seconds: 0.109, TFLOP/s/device: 124.187, Tokens/s/device: 18718.753, total_weights: 13811, loss: 10.888 I0416 05:09:51.329075 131745059964480 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 153 array_metadata.ArrayMetadata to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints/10/items/array_metadatas/process_0 I0416 05:09:51.354357 131859403328640 metric_logger.py:185] completed step: 17, seconds: 0.110, TFLOP/s/device: 123.651, Tokens/s/device: 18638.006, total_weights: 13709, loss: 10.887 I0416 05:09:51.464509 131859403328640 metric_logger.py:185] completed step: 18, seconds: 0.109, TFLOP/s/device: 125.048, Tokens/s/device: 18848.649, total_weights: 12831, loss: 10.879 I0416 05:09:52.012486 131859403328640 checkpointing.py:794] Waiting for step 19 to finish before checkpoint... I0416 05:09:52.039765 131859403328640 checkpointing.py:798] Waited 0.027270793914794922 seconds for step 19 to finish before starting checkpointing. I0416 05:09:52.041631 131859403328640 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=10][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0416 05:10:15.602711 131745020118592 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 25.023017s (commit=24.621472s, array_metadata_write=0.401545s) I0416 05:10:15.603765 131744988661312 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 421.338 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 29 seconds) (per-host) I0416 05:10:15.603827 131744988661312 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 25.023121s. I0416 05:10:16.046396 131744988661312 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 05:10:16.442878 131744988661312 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389). I0416 05:10:16.443946 131744988661312 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.543520s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints/10/items I0416 05:10:16.444631 131744988661312 atomicity.py:608] Finalizing gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints/10/items I0416 05:10:16.667430 131744988661312 atomicity.py:608] Finalizing gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints/10 I0416 05:10:17.325422 131744988661312 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_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints/10`. I0416 05:10:17.326060 131744988661312 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 31.807429s. directory=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints/10 I0416 05:10:17.326129 131744988661312 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 26.745425s. I0416 05:10:17.326298 131744999147072 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0416 05:10:17.326403 131744999147072 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0416 05:10:17.326455 131744999147072 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=10] CheckpointManager Save Finalize is syncing with other hosts... I0416 05:10:17.326494 131744999147072 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=10] CheckpointManager Save Finalize is done on all hosts. I0416 05:10:17.326588 131859403328640 checkpoint_manager.py:2006] [process=0][thread=MainThread][step=10][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=10. W0416 05:10:17.326647 131859403328640 checkpoint_manager.py:1441] Waiting for previous save to complete took 25.285032 seconds. If this number is high, consider checkpointing less frequently. I0416 05:10:17.326829 131859403328640 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 19 I0416 05:10:17.327105 131859403328640 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints/19. I0416 05:10:17.522269 131744988661312 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints/19 I0416 05:10:17.522431 131859403328640 jax_array_handlers.py:347] Scheduling D2H of 153 prioritized jax.Array. I0416 05:10:17.522653 131859403328640 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 05:10:18.207456 131745020118592 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints/19/items I0416 05:10:22.885199 131859403328640 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 5.364650s I0416 05:10:22.891007 131859403328640 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.255 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 5 seconds) (per-host) I0416 05:10:22.896982 131859403328640 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 5.479903s (batch_requests_ready=0.086818s, total_serialization_initiated=5.381490s, others=0.011594s) I0416 05:10:22.897124 131859403328640 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 5.480472s (all_items=0.000013s, per_item={'items': '0.00001311'}, temp_paths=5.480459) I0416 05:10:22.898670 131745009632832 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0416 05:10:22.898756 131859403328640 async_checkpointer.py:561] Finished blocking save. Time taken: 5.571884s. Continuing background save to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints/19. I0416 05:10:22.898962 131859403328640 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=19] Starting CheckpointManager Save Finalize thread=save_finalize I0416 05:10:22.899128 131744999147072 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0416 05:10:22.899230 131859403328640 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776316192.0416043, 'wait_for_prev_duration_secs': 25.28503179550171, 'time_between_consecutive_saves_sec': 6.524377107620239, 'checkpointer_blocking_start_time': 1776316217.3268514, 'checkpointer_blocking_duration_secs': 5.572017192840576, 'get_old_steps_start_time': 1776316222.898889, 'get_old_steps_duration_secs': 3.457069396972656e-05, 'checkpoint_manager_blocking_start_time': 1776316192.0415683, 'checkpoint_manager_blocking_duration_secs': 30.857637405395508} I0416 05:10:22.899488 131859403328640 checkpointing.py:409] Started an asynchronous checkpoint save for step 19 I0416 05:10:22.899522 131859403328640 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=19][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0416 05:10:23.656451 131745101907520 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 153 array_metadata.ArrayMetadata to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints/19/items/array_metadatas/process_0 I0416 05:10:51.724933 131753362589248 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 28.826989s (commit=28.389250s, array_metadata_write=0.437739s) I0416 05:10:51.726070 131745009632832 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 368.362 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 34 seconds) (per-host) I0416 05:10:51.726130 131745009632832 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 28.827325s. I0416 05:10:52.152449 131745009632832 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 05:10:52.573287 131745009632832 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389). I0416 05:10:52.574250 131745009632832 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.578402s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints/19/items I0416 05:10:52.574912 131745009632832 atomicity.py:608] Finalizing gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints/19/items I0416 05:10:52.820716 131745009632832 atomicity.py:608] Finalizing gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints/19 I0416 05:10:53.502625 131745009632832 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_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints/19`. I0416 05:10:53.503277 131745009632832 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 36.176413s. directory=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260416_033532/nnx_feat_nnx_trainstate_and_training_loop_20260416_033532_05_fp8/checkpoints/19 I0416 05:10:53.503340 131745009632832 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 30.604541s. I0416 05:10:53.503479 131744999147072 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0416 05:10:53.503587 131744999147072 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0416 05:10:53.503642 131744999147072 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=19] CheckpointManager Save Finalize is syncing with other hosts... I0416 05:10:53.503681 131744999147072 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=19] CheckpointManager Save Finalize is done on all hosts. I0416 05:10:53.503800 131859403328640 checkpoint_manager.py:2006] [process=0][thread=MainThread][step=19][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=19. I0416 05:10:53.503968 131859403328640 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0416 05:10:53.504505 131859403328640 metric_logger.py:185] completed step: 19, seconds: 0.114, TFLOP/s/device: 119.614, Tokens/s/device: 18029.597, total_weights: 13717, loss: 10.882 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops