2026-04-20 15:51:04.669321: E external/local_xla/xla/stream_executor/cuda/cuda_platform.cc:51] failed call to cuInit: INTERNAL: CUDA error: Failed call to cuInit: UNKNOWN ERROR (303) I0420 15:51:04.785855 126200972434560 max_utils.py:238] Skipping jax distributed system due to skip_jax_distributed_system=True flag. I0420 15:51:31.718905 126200972434560 max_utils.py:800] System Information: Jax Version: 0.9.2 I0420 15:51:31.719020 126200972434560 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0420 15:51:31.719073 126200972434560 max_utils.py:802] System Information: Jax Backend: PJRT C API TFRT TPU v6 lite Built on Apr 6 2026 20:48:10 (1775533690) cl/895581894 I0420 15:51:31.719099 126200972434560 train_utils.py:365] WARNING: 'dataset_path' might be pointing your local file system I0420 15:51:31.719183 126200972434560 train.py:806] [DECOUPLED NO-OP] skipping cloud diagnostics wrapper. I0420 15:51:32.239646 126200972434560 maxtext_utils.py:1718] Num_devices: 8, shape (1, 1, 1, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0420 15:51:32.982920 126200972434560 checkpointing.py:688] Setting up checkpoint logger... I0420 15:51:32.983130 126200972434560 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0420 15:51:32.983172 126200972434560 pytree_checkpoint_handler.py:577] save_device_host_concurrent_bytes=None I0420 15:51:32.983375 126200972434560 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 0x72c6dd300dd0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0420 15:51:35.367431 126200972434560 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0420 15:51:35.367633 126200972434560 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 0x72c1def7fd40>}, handler_registry=None I0420 15:51:35.367910 126200972434560 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x72c1def7fd40>` for item "items" and save args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>` to `_handler_registry`. I0420 15:51:35.367949 126200972434560 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x72c1def7c830>` for item "metrics" and save args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>` to `_handler_registry`. I0420 15:51:35.367987 126200972434560 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 0x72c1def7fd40>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x72c1def7fd40>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x72c1def7c830>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x72c1def7c830>}). I0420 15:51:35.368309 126200972434560 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.28 I0420 15:51:35.368364 126200972434560 async_checkpointer.py:177] [process=0][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>.<lambda> at 0x72c1defc99e0> timeout: 600 secs and primary_host=0 for async checkpoint writes I0420 15:51:35.498694 126200972434560 checkpoint_manager.py:1788] Found 0 checkpoint steps in gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints I0420 15:51:35.498934 126200972434560 checkpoint_manager.py:921] [process=0][thread=MainThread] CheckpointManager created, primary_host=0, CheckpointManagerOptions=CheckpointManagerOptions(save_interval_steps=1, max_to_keep=None, keep_time_interval=None, keep_period=None, should_keep_fn=None, best_fn=None, best_mode='max', keep_checkpoints_without_metrics=True, step_prefix=None, step_format_fixed_length=None, step_name_format=None, create=True, cleanup_tmp_directories=False, save_on_steps=frozenset(), single_host_load_and_broadcast=False, todelete_subdir=None, todelete_full_path=None, enable_hns=False, enable_background_delete=False, read_only=False, enable_async_checkpointing=True, async_options=None, multiprocessing_options=MultiprocessingOptions(primary_host=0, active_processes=None, barrier_sync_key_prefix=None), should_save_fn=None, file_options=FileOptions(path_permission_mode=None), save_root_metadata=True, temporary_path_class=None, save_decision_policy=FixedIntervalPolicy(interval=10), preservation_policy=LatestN(n=None), prevent_write_metrics=False, enable_should_save_is_saving_in_progress_check=True, enable_per_process_directory_creation=False), root_directory=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x72c1def54b60> I0420 15:51:35.499023 126200972434560 checkpointing.py:302] Checkpoint manager created! I0420 15:51:35.579320 126200972434560 dataset_info.py:707] Load dataset info from tests/assets/local_datasets/c4_en_dataset_minimal/c4/en/3.1.0 I0420 15:51:35.582425 126200972434560 reader.py:262] Creating a tf.data.Dataset reading 8 files located in folders: tests/assets/local_datasets/c4_en_dataset_minimal/c4/en/3.1.0. I0420 15:51:35.640517 126200972434560 logging_logger.py:49] Constructing tf.data.Dataset __local_c4_builder for split train, from tests/assets/local_datasets/c4_en_dataset_minimal/c4/en/3.1.0 I0420 15:51:35.668889 126200972434560 tokenizer.py:245] Tokenizer path: src/maxtext/assets/tokenizers/tokenizer.llama2 I0420 15:51:35.668956 126200972434560 tokenizer.py:187] Loading sentencepiece tokenizer: src/maxtext/assets/tokenizers/tokenizer.llama2 I0420 15:51:36.573813 126200972434560 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0420 15:51:36.573928 126200972434560 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 I0420 15:51:39.808630 126200972434560 nnx_decoders.py:465] nnx_decoders/carry Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0420 15:51:39.808723 126200972434560 nnx_decoders.py:465] nnx_decoders/carry Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0420 15:51:39.813806 126200972434560 nnx_decoders.py:465] Unknown Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0420 15:51:39.813851 126200972434560 nnx_decoders.py:465] Unknown Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0420 15:51:39.829326 126200972434560 attentions.py:1088] attentions/inputs_q Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0420 15:51:39.829375 126200972434560 attentions.py:1088] attentions/inputs_q Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0420 15:51:39.847526 126200972434560 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0420 15:51:39.847632 126200972434560 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0420 15:51:39.906336 126200972434560 attentions.py:1154] attentions/query Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0420 15:51:39.906416 126200972434560 attentions.py:1154] attentions/query Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0420 15:51:39.921254 126200972434560 attentions.py:1155] attentions/key Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0420 15:51:39.921308 126200972434560 attentions.py:1155] attentions/key Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0420 15:51:39.936069 126200972434560 attentions.py:1156] attentions/value Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0420 15:51:39.936121 126200972434560 attentions.py:1156] attentions/value Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0420 15:51:39.964196 126200972434560 attentions.py:1197] attentions/out Logical: bfloat16[8,2048,16,128]..................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0420 15:51:39.964267 126200972434560 attentions.py:1197] attentions/out Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0420 15:51:40.017525 126200972434560 linears.py:525] linears/x Logical: bfloat16[8,2048,7168]....................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0420 15:51:40.017612 126200972434560 linears.py:525] linears/x Physical: bfloat16[8,2048,7168]....................................... ('fsdp', None, None). I0420 15:51:52.596984 126200972434560 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. I0420 15:51:52.597839 126200972434560 max_utils.py:194] tensorboardX not available; using no-op SummaryWriter. I0420 15:51:52.600923 126200972434560 metric_logger.py:301] number parameters: 1.104 billion I0420 15:52:08.528484 126200972434560 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0420 15:52:08.666295 126200972434560 checkpointing.py:798] Waited 0.13779354095458984 seconds for step 0 to finish before starting checkpointing. I0420 15:52:08.666848 126200972434560 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0420 15:52:08.667020 126200972434560 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 0 I0420 15:52:08.667433 126200972434560 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints/0. I0420 15:52:08.784537 126200972434560 signaling_client.py:373] Using ThreadSafeKeyValueSignalingClient I0420 15:52:08.882755 126085897389632 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints/0 I0420 15:52:08.938624 126200972434560 jax_array_handlers.py:347] Scheduling D2H of 153 prioritized jax.Array. I0420 15:52:08.938724 126200972434560 replica_slices.py:410] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False I0420 15:52:09.710866 126085886903872 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints/0/items I0420 15:52:09.859909 126085847057984 checkpoint.py:188] Wrote Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776700329614335467, 'commit_timestamp_nsecs': None, 'custom_metadata': {}}, json={"item_handlers": null, "metrics": {}, "performance_metrics": {}, "init_timestamp_nsecs": 1776700329614335467, "commit_timestamp_nsecs": null, "custom_metadata": {}} to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints/0/_CHECKPOINT_METADATA I0420 15:52:10.258901 1139228 google_auth_provider.cc:149] Using credentials at ~/.config/gcloud/application_default_credentials.json I0420 15:52:10.258956 1139228 google_auth_provider.cc:156] Using OAuth2 AuthProvider I0420 15:52:11.230677 126200972434560 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 2.293790s I0420 15:52:11.244882 126200972434560 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 5.020 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 2 seconds) (per-host) I0420 15:52:11.244972 126200972434560 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 2.458654s (batch_requests_ready=0.133466s, total_serialization_initiated=2.311131s, others=0.014057s) I0420 15:52:11.245098 126200972434560 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 2.459980s (all_items=0.000020s, per_item={'items': '0.00002003'}, temp_paths=2.459960) I0420 15:52:11.246910 126085773657664 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0420 15:52:11.247055 126200972434560 async_checkpointer.py:561] Finished blocking save. Time taken: 2.579962s. Continuing background save to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints/0. I0420 15:52:11.247418 126200972434560 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0420 15:52:11.247640 126085907875392 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0420 15:52:11.247778 126200972434560 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776700328.6668348, 'wait_for_prev_duration_secs': 4.00543212890625e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776700328.6670556, 'checkpointer_blocking_duration_secs': 2.5802555084228516, 'get_old_steps_start_time': 1776700331.24734, 'get_old_steps_duration_secs': 2.8371810913085938e-05, 'checkpoint_manager_blocking_start_time': 1776700328.66673, 'checkpoint_manager_blocking_duration_secs': 2.5810117721557617} I0420 15:52:11.248102 126200972434560 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0420 15:52:11.248181 126200972434560 max_utils.py:750] Memstats: After params initialized: I0420 15:52:11.248234 126200972434560 max_utils.py:756] Using (GB) 1.61 / 31.25 (5.152000%) on TPU_0(process=0,(0,0,0,0)) I0420 15:52:11.248261 126200972434560 max_utils.py:756] Using (GB) 1.61 / 31.25 (5.152000%) on TPU_1(process=0,(1,0,0,0)) I0420 15:52:11.248281 126200972434560 max_utils.py:756] Using (GB) 1.61 / 31.25 (5.152000%) on TPU_2(process=0,(0,1,0,0)) I0420 15:52:11.248301 126200972434560 max_utils.py:756] Using (GB) 1.61 / 31.25 (5.152000%) on TPU_3(process=0,(1,1,0,0)) I0420 15:52:11.248320 126200972434560 max_utils.py:756] Using (GB) 1.61 / 31.25 (5.152000%) on TPU_4(process=0,(0,2,0,0)) I0420 15:52:11.248338 126200972434560 max_utils.py:756] Using (GB) 1.61 / 31.25 (5.152000%) on TPU_5(process=0,(1,2,0,0)) I0420 15:52:11.248356 126200972434560 max_utils.py:756] Using (GB) 1.61 / 31.25 (5.152000%) on TPU_6(process=0,(0,3,0,0)) I0420 15:52:11.248375 126200972434560 max_utils.py:756] Using (GB) 1.61 / 31.25 (5.152000%) on TPU_7(process=0,(1,3,0,0)) I0420 15:52:11.680571 126200972434560 metric_logger.py:196] completed step: 0, seconds: 15.925, TFLOP/s/device: 0.853, Tokens/s/device: 128.601, total_weights: 13328, loss: 10.885, lm_loss: 10.885, perplexity: 53359.055 I0420 15:52:11.681565 126200972434560 metric_logger.py:281] To see full metrics 'tensorboard --logdir=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/tensorboard/' I0420 15:52:11.778965 126200972434560 metric_logger.py:196] completed step: 1, seconds: 3.144, TFLOP/s/device: 4.322, Tokens/s/device: 651.492, total_weights: 12332, loss: 10.851, lm_loss: 10.851, perplexity: 51588.516 I0420 15:52:11.887915 126200972434560 metric_logger.py:196] completed step: 2, seconds: 0.039, TFLOP/s/device: 346.019, Tokens/s/device: 52155.754, total_weights: 15161, loss: 10.862, lm_loss: 10.862, perplexity: 52164.965 I0420 15:52:11.996982 126200972434560 metric_logger.py:196] completed step: 3, seconds: 0.081, TFLOP/s/device: 167.327, Tokens/s/device: 25221.364, total_weights: 13327, loss: 10.895, lm_loss: 10.895, perplexity: 53932.965 I0420 15:52:12.025494 126085865932352 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_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints/0/items/array_metadatas/process_0 I0420 15:52:33.733118 126200972434560 metric_logger.py:196] completed step: 4, seconds: 0.109, TFLOP/s/device: 124.519, Tokens/s/device: 18768.844, total_weights: 11939, loss: 10.906, lm_loss: 10.906, perplexity: 54497.988 I0420 15:52:33.750848 126200972434560 metric_logger.py:196] completed step: 5, seconds: 0.109, TFLOP/s/device: 124.776, Tokens/s/device: 18807.626, total_weights: 15502, loss: 10.872, lm_loss: 10.872, perplexity: 52683.910 I0420 15:52:33.854134 126200972434560 metric_logger.py:196] completed step: 6, seconds: 21.738, TFLOP/s/device: 0.625, Tokens/s/device: 94.214, total_weights: 13864, loss: 10.889, lm_loss: 10.889, perplexity: 53564.559 I0420 15:52:33.963140 126200972434560 metric_logger.py:196] completed step: 7, seconds: 0.011, TFLOP/s/device: 1289.713, Tokens/s/device: 194399.620, total_weights: 12988, loss: 10.889, lm_loss: 10.889, perplexity: 53557.121 I0420 15:52:34.072408 126200972434560 metric_logger.py:196] completed step: 8, seconds: 0.105, TFLOP/s/device: 128.880, Tokens/s/device: 19426.132, total_weights: 13820, loss: 10.874, lm_loss: 10.874, perplexity: 52773.910 I0420 15:52:34.082802 126200972434560 checkpointing.py:794] Waiting for step 10 to finish before checkpoint... I0420 15:52:34.292678 126200972434560 checkpointing.py:798] Waited 0.20984458923339844 seconds for step 10 to finish before starting checkpointing. I0420 15:52:34.293235 126200972434560 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0420 15:52:40.002654 126085794629184 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 28.756527s (commit=28.306905s, array_metadata_write=0.449622s) I0420 15:52:40.004154 126085773657664 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 404.837 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 31 seconds) (per-host) I0420 15:52:40.004287 126085773657664 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 28.757171s. I0420 15:52:40.221302 126085773657664 checkpoint.py:228] Read Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776700329614335467, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} from gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints/0/_CHECKPOINT_METADATA I0420 15:52:40.404238 126085773657664 array_metadata_store.py:367] [process=0][thread=async_save] Skipped cross-host ArrayMetadata validation because only one process is found: process_index=0. I0420 15:52:40.588445 126085847057984 checkpoint.py:247] Updated Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776700329614335467, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints/0/_CHECKPOINT_METADATA I0420 15:52:40.814601 126085773657664 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389). I0420 15:52:40.815609 126085773657664 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.561731s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints/0/items I0420 15:52:40.816379 126085773657664 atomicity.py:608] Finalizing gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints/0/items I0420 15:52:41.060844 126085773657664 atomicity.py:608] Finalizing gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints/0 I0420 15:52:41.724163 126085773657664 atomicity.py:794] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints/0`. I0420 15:52:41.724882 126085773657664 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 33.057814s. directory=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints/0 I0420 15:52:41.724956 126085773657664 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 30.477843s. I0420 15:52:41.725181 126085907875392 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0420 15:52:41.725306 126085907875392 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0420 15:52:41.725363 126085907875392 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0420 15:52:41.725418 126085907875392 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0420 15:52:41.725577 126200972434560 checkpoint_manager.py:2006] [process=0][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0. W0420 15:52:41.725729 126200972434560 checkpoint_manager.py:1441] Waiting for previous save to complete took 7.432500 seconds. If this number is high, consider checkpointing less frequently. I0420 15:52:41.726732 126200972434560 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 10 I0420 15:52:41.727077 126200972434560 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints/10. I0420 15:52:41.904199 126085907875392 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints/10 I0420 15:52:41.925058 126200972434560 jax_array_handlers.py:347] Scheduling D2H of 153 prioritized jax.Array. I0420 15:52:41.925165 126200972434560 replica_slices.py:410] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False I0420 15:52:42.613627 126085763171904 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints/10/items I0420 15:52:42.687607 126200972434560 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.764326s I0420 15:52:42.688053 126200972434560 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 14.190 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 869 milliseconds) (per-host) I0420 15:52:42.688104 126200972434560 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 0.869861s (batch_requests_ready=0.089007s, total_serialization_initiated=0.780530s, others=0.000324s) I0420 15:52:42.688173 126200972434560 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.870439s (all_items=0.000019s, per_item={'items': '0.00001907'}, temp_paths=0.870420) I0420 15:52:42.689066 126085815600704 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0420 15:52:42.689175 126200972434560 async_checkpointer.py:561] Finished blocking save. Time taken: 0.962399s. Continuing background save to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints/10. I0420 15:52:42.689366 126200972434560 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=10] Starting CheckpointManager Save Finalize thread=save_finalize I0420 15:52:42.689589 126200972434560 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776700354.2931893, 'wait_for_prev_duration_secs': 7.43250036239624, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776700361.726756, 'checkpointer_blocking_duration_secs': 0.9625222682952881, 'get_old_steps_start_time': 1776700362.6892989, 'get_old_steps_duration_secs': 2.8848648071289062e-05, 'checkpoint_manager_blocking_start_time': 1776700354.2931125, 'checkpoint_manager_blocking_duration_secs': 8.396453142166138} I0420 15:52:42.689678 126200972434560 checkpointing.py:409] Started an asynchronous checkpoint save for step 10 I0420 15:52:42.690412 126200972434560 metric_logger.py:196] completed step: 9, seconds: 0.109, TFLOP/s/device: 124.850, Tokens/s/device: 18818.686, total_weights: 12300, loss: 10.883, lm_loss: 10.883, perplexity: 53262.496 I0420 15:52:42.705514 126200972434560 metric_logger.py:196] completed step: 10, seconds: 0.109, TFLOP/s/device: 124.649, Tokens/s/device: 18788.474, total_weights: 13436, loss: 10.869, lm_loss: 10.869, perplexity: 52517.254 I0420 15:52:42.766126 126085805114944 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0420 15:52:42.807495 126200972434560 metric_logger.py:196] completed step: 11, seconds: 8.618, TFLOP/s/device: 1.577, Tokens/s/device: 237.635, total_weights: 13817, loss: 10.862, lm_loss: 10.862, perplexity: 52142.488 I0420 15:52:42.916933 126200972434560 metric_logger.py:196] completed step: 12, seconds: 0.013, TFLOP/s/device: 1011.022, Tokens/s/device: 152392.291, total_weights: 12076, loss: 10.893, lm_loss: 10.893, perplexity: 53781.801 I0420 15:52:43.026121 126200972434560 metric_logger.py:196] completed step: 13, seconds: 0.104, TFLOP/s/device: 130.169, Tokens/s/device: 19620.429, total_weights: 11048, loss: 10.908, lm_loss: 10.908, perplexity: 54587.297 I0420 15:52:43.136868 126200972434560 metric_logger.py:196] completed step: 14, seconds: 0.109, TFLOP/s/device: 124.555, Tokens/s/device: 18774.350, total_weights: 14267, loss: 10.890, lm_loss: 10.890, perplexity: 53654.500 I0420 15:52:43.244540 126200972434560 metric_logger.py:196] completed step: 15, seconds: 0.109, TFLOP/s/device: 124.752, Tokens/s/device: 18804.000, total_weights: 13004, loss: 10.887, lm_loss: 10.887, perplexity: 53493.012 I0420 15:52:43.353844 126200972434560 metric_logger.py:196] completed step: 16, seconds: 0.122, TFLOP/s/device: 111.320, Tokens/s/device: 16779.321, total_weights: 13811, loss: 10.888, lm_loss: 10.888, perplexity: 53513.699 I0420 15:52:43.463224 126200972434560 metric_logger.py:196] completed step: 17, seconds: 0.097, TFLOP/s/device: 139.507, Tokens/s/device: 21027.989, total_weights: 13709, loss: 10.887, lm_loss: 10.887, perplexity: 53488.094 I0420 15:52:43.572473 126200972434560 metric_logger.py:196] completed step: 18, seconds: 0.108, TFLOP/s/device: 125.367, Tokens/s/device: 18896.650, total_weights: 12831, loss: 10.879, lm_loss: 10.879, perplexity: 53070.078 I0420 15:52:43.683313 126200972434560 checkpointing.py:794] Waiting for step 19 to finish before checkpoint... I0420 15:52:43.686183 126200972434560 checkpointing.py:798] Waited 0.0028798580169677734 seconds for step 19 to finish before starting checkpointing. I0420 15:52:43.686503 126200972434560 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=10][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0420 15:52:43.872311 126085907875392 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_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints/10/items/array_metadatas/process_0 I0420 15:53:07.067304 126085794629184 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 23.931770s (commit=23.474473s, array_metadata_write=0.457296s) I0420 15:53:07.068891 126085815600704 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 500.508 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 25 seconds) (per-host) I0420 15:53:07.069014 126085815600704 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 24.379794s. I0420 15:53:07.523846 126085815600704 array_metadata_store.py:367] [process=0][thread=async_save] Skipped cross-host ArrayMetadata validation because only one process is found: process_index=0. I0420 15:53:07.921003 126085815600704 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389). I0420 15:53:07.921848 126085815600704 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.562632s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints/10/items I0420 15:53:07.922598 126085815600704 atomicity.py:608] Finalizing gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints/10/items I0420 15:53:08.165983 126085815600704 atomicity.py:608] Finalizing gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints/10 I0420 15:53:08.837076 126085815600704 atomicity.py:794] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints/10`. I0420 15:53:08.837861 126085815600704 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 27.111090s. directory=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints/10 I0420 15:53:08.837952 126085815600704 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 26.148733s. I0420 15:53:08.838153 126085805114944 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0420 15:53:08.838269 126085805114944 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0420 15:53:08.838320 126085805114944 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=10] CheckpointManager Save Finalize is syncing with other hosts... I0420 15:53:08.838360 126085805114944 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=10] CheckpointManager Save Finalize is done on all hosts. I0420 15:53:08.838516 126200972434560 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. W0420 15:53:08.838658 126200972434560 checkpoint_manager.py:1441] Waiting for previous save to complete took 25.152158 seconds. If this number is high, consider checkpointing less frequently. I0420 15:53:08.838885 126200972434560 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 19 I0420 15:53:08.839223 126200972434560 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints/19. I0420 15:53:09.021128 126085805114944 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints/19 I0420 15:53:09.042299 126200972434560 jax_array_handlers.py:347] Scheduling D2H of 153 prioritized jax.Array. I0420 15:53:09.042399 126200972434560 replica_slices.py:410] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False I0420 15:53:09.743895 126085826086464 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints/19/items I0420 15:53:13.845474 126200972434560 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 4.804920s I0420 15:53:13.857301 126200972434560 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.505 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 4 seconds) (per-host) I0420 15:53:13.857365 126200972434560 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 4.926430s (batch_requests_ready=0.092930s, total_serialization_initiated=4.821807s, others=0.011693s) I0420 15:53:13.857455 126200972434560 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 4.926995s (all_items=0.000014s, per_item={'items': '0.00001359'}, temp_paths=4.926981) I0420 15:53:13.859095 126087061308992 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0420 15:53:13.859201 126200972434560 async_checkpointer.py:561] Finished blocking save. Time taken: 5.020276s. Continuing background save to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints/19. I0420 15:53:13.859379 126200972434560 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=19] Starting CheckpointManager Save Finalize thread=save_finalize I0420 15:53:13.859560 126085815600704 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0420 15:53:13.859686 126200972434560 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776700363.6864712, 'wait_for_prev_duration_secs': 25.15215754508972, 'time_between_consecutive_saves_sec': 1.961038589477539, 'checkpointer_blocking_start_time': 1776700388.838908, 'checkpointer_blocking_duration_secs': 5.020399808883667, 'get_old_steps_start_time': 1776700393.859325, 'get_old_steps_duration_secs': 2.0503997802734375e-05, 'checkpoint_manager_blocking_start_time': 1776700363.6864405, 'checkpoint_manager_blocking_duration_secs': 30.173216819763184} I0420 15:53:13.859826 126200972434560 checkpointing.py:409] Started an asynchronous checkpoint save for step 19 I0420 15:53:13.859858 126200972434560 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=19][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0420 15:53:14.611024 126085907875392 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_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints/19/items/array_metadatas/process_0 I0420 15:53:50.325689 126087090669120 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 36.467481s (commit=36.036736s, array_metadata_write=0.430745s) I0420 15:53:50.326903 126087061308992 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 305.298 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 41 seconds) (per-host) I0420 15:53:50.326971 126087061308992 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 36.467722s. I0420 15:53:50.745908 126087061308992 array_metadata_store.py:367] [process=0][thread=async_save] Skipped cross-host ArrayMetadata validation because only one process is found: process_index=0. I0420 15:53:51.155377 126087061308992 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389). I0420 15:53:51.156477 126087061308992 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.560606s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints/19/items I0420 15:53:51.157240 126087061308992 atomicity.py:608] Finalizing gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints/19/items I0420 15:53:51.393170 126087061308992 atomicity.py:608] Finalizing gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints/19 I0420 15:53:52.071936 126087061308992 atomicity.py:794] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints/19`. I0420 15:53:52.072671 126087061308992 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 43.233753s. directory=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260420_142345/nnx_feat_nnx_trainstate_and_training_loop_20260420_142345_05_fp8/checkpoints/19 I0420 15:53:52.072735 126087061308992 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 38.213490s. I0420 15:53:52.072937 126085815600704 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0420 15:53:52.073076 126085815600704 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0420 15:53:52.073131 126085815600704 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=19] CheckpointManager Save Finalize is syncing with other hosts... I0420 15:53:52.073168 126085815600704 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=19] CheckpointManager Save Finalize is done on all hosts. I0420 15:53:52.073361 126200972434560 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. I0420 15:53:52.073543 126200972434560 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0420 15:53:52.074413 126200972434560 metric_logger.py:196] completed step: 19, seconds: 0.113, TFLOP/s/device: 119.971, Tokens/s/device: 18083.406, total_weights: 13717, loss: 10.882, lm_loss: 10.882, perplexity: 53188.996 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops