MaxView

Timing Test Reference Updates
‹ 09_pdb_lt_1Case: 10_shardy_false10_shardy_true ›

Metrics: main (b341212ce) vs feat/nnx-trainstate-and-training-loop (29bbe47ed)

Metricmain  b341212cefeat/nnx-trainstate-and-training-loop  29bbe47edDiff (feat/nnx-trainstate-and-training-loop − main)
Parameters1.104 billion1.104 billion—
Final loss8.71008.71000
TFLOP/s114.304114.141-0.163
Tok/s17229.217204.6-24.605
Avg s/step2.0691.931-0.138
Memory %5.095.090
JAX0.8.10.8.1—

Diff = branch value − main value. Green = branch improved. Red = branch regressed.

main  ·  b341212ce  ·  main_20260421_144657  ·  full log 
2026-04-21 15:21:04.766619: 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 00:00:1776784864.776749 1511288 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered
E0000 00:00:1776784864.779987 1511288 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered
W0000 00:00:1776784864.789555 1511288 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776784864.789568 1511288 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776784864.789570 1511288 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776784864.789572 1511288 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
2026-04-21 15:21:08.387273: 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 15:21:08.506802 128391294569600 max_utils.py:238] Skipping jax distributed system due to skip_jax_distributed_system=True flag.
I0421 15:21:35.602263 128391294569600 max_utils.py:800] System Information: Jax Version: 0.8.1
I0421 15:21:35.602425 128391294569600 max_utils.py:801] System Information: Jaxlib Version: 0.8.1
I0421 15:21:35.602461 128391294569600 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 15:21:35.602497 128391294569600 train_utils.py:335] WARNING: 'dataset_path' might be pointing your local file system
I0421 15:21:35.602631 128391294569600 train.py:703] [DECOUPLED NO-OP] skipping cloud diagnostics wrapper.
I0421 15:21:35.963430 128391294569600 maxtext_utils.py:1551] Num_devices: 8, shape (1, 1, 1, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0421 15:21:35.964017 128391294569600 checkpointing.py:677] Setting up checkpoint logger...
I0421 15:21:35.964082 128391294569600 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True
I0421 15:21:35.964197 128391294569600 pytree_checkpoint_handler.py:577] save_device_host_concurrent_bytes=None
I0421 15:21:35.965299 128391294569600 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 0x74c523dad850>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0421 15:21:38.343144 128391294569600 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0421 15:21:38.343424 128391294569600 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 0x74c378b72960>}, handler_registry=None
I0421 15:21:38.343879 128391294569600 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x74c378b72960>` 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 15:21:38.343925 128391294569600 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x74c378b72ed0>` 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 15:21:38.343959 128391294569600 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 0x74c378b72960>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x74c378b72960>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x74c378b72ed0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x74c378b72ed0>}).
I0421 15:21:38.344321 128391294569600 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.28
I0421 15:21:38.344389 128391294569600 async_checkpointer.py:177] [process=0][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>.<lambda> at 0x74c378b95260> timeout: 600 secs and primary_host=0 for async checkpoint writes
I0421 15:21:38.462284 128391294569600 checkpoint_manager.py:1788] Found 0 checkpoint steps in gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_10_shardy_false/checkpoints
I0421 15:21:38.462588 128391294569600 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_main_20260421_144657/linen_main_20260421_144657_10_shardy_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x74c3793fe360>
I0421 15:21:38.462690 128391294569600 checkpointing.py:301] Checkpoint manager created!
I0421 15:21:38.867524 128391294569600 dataset_info.py:707] Load dataset info from tests/assets/local_datasets/c4_en_dataset_minimal/c4/en/3.1.0
I0421 15:21:38.870575 128391294569600 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 15:21:38.922461 128391294569600 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 15:21:38.945017 128391294569600 tokenizer.py:245] Tokenizer path: src/maxtext/assets/tokenizers/tokenizer.llama2
I0421 15:21:38.945092 128391294569600 tokenizer.py:187] Loading sentencepiece tokenizer: src/maxtext/assets/tokenizers/tokenizer.llama2
I0421 15:21:39.564147 128391294569600 nnx_wrappers.py:437] Unknown Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0421 15:21:39.564245 128391294569600 nnx_wrappers.py:437] Unknown Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None).
I0421 15:21:39.864632 128391294569600 attentions.py:1088] attentions/inputs_q Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0421 15:21:39.864717 128391294569600 attentions.py:1088] attentions/inputs_q Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None).
I0421 15:21:39.877330 128391294569600 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0421 15:21:39.877379 128391294569600 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None).
I0421 15:21:39.896258 128391294569600 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 15:21:39.896315 128391294569600 attentions.py:1154] attentions/query Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None).
I0421 15:21:39.909111 128391294569600 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 15:21:39.909162 128391294569600 attentions.py:1155] attentions/key Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None).
I0421 15:21:39.921672 128391294569600 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 15:21:39.921722 128391294569600 attentions.py:1156] attentions/value Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None).
I0421 15:21:39.941402 128391294569600 attentions.py:1197] attentions/out Logical: bfloat16[8,2048,16,128]..................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0421 15:21:39.941462 128391294569600 attentions.py:1197] attentions/out Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None).
I0421 15:21:39.957244 128391294569600 linears.py:525] linears/x Logical: bfloat16[8,2048,7168]....................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0421 15:21:39.957298 128391294569600 linears.py:525] linears/x Physical: bfloat16[8,2048,7168]....................................... ('fsdp', None, None).
I0421 15:21:40.110287 128391294569600 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0421 15:21:40.110388 128391294569600 checkpointing.py:665] 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 15:21:41.763497 128391294569600 maxtext_utils.py:1654]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   PartitionSpec('norm',)
    Physical:  (None,)
I0421 15:21:41.763611 128391294569600 maxtext_utils.py:1654]  params/params/decoder/layers/mlp/wi_0/kernel
    Shape:     float32[2048,16,7168]
    Logical:   PartitionSpec('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0421 15:21:41.763654 128391294569600 maxtext_utils.py:1654]  params/params/decoder/layers/mlp/wi_1/kernel
    Shape:     float32[2048,16,7168]
    Logical:   PartitionSpec('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0421 15:21:41.763700 128391294569600 maxtext_utils.py:1654]  params/params/decoder/layers/mlp/wo/kernel
    Shape:     float32[7168,16,2048]
    Logical:   PartitionSpec('mlp', 'layers', 'embed')
    Physical:  (None, None, 'fsdp')
I0421 15:21:41.763747 128391294569600 maxtext_utils.py:1654]  params/params/decoder/layers/post_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   PartitionSpec('norm', 'layers')
    Physical:  (None, None)
I0421 15:21:41.763777 128391294569600 maxtext_utils.py:1654]  params/params/decoder/layers/pre_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   PartitionSpec('norm', 'layers')
    Physical:  (None, None)
I0421 15:21:41.763817 128391294569600 maxtext_utils.py:1654]  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 15:21:41.763857 128391294569600 maxtext_utils.py:1654]  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 15:21:41.763885 128391294569600 maxtext_utils.py:1654]  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 15:21:41.763911 128391294569600 maxtext_utils.py:1654]  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 15:21:41.763948 128391294569600 maxtext_utils.py:1654]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   PartitionSpec('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)
I0421 15:21:41.763983 128391294569600 maxtext_utils.py:1654]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   PartitionSpec('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')

I0421 15:21:42.179405 128391294569600 train.py:155] train/xent Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length').
I0421 15:21:42.179499 128391294569600 train.py:155] train/xent Physical: float32[8,2048]............................................. ('fsdp', None).
I0421 15:21:42.191905 128391294569600 train.py:162] train/z_loss Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length').
I0421 15:21:42.191957 128391294569600 train.py:162] train/z_loss Physical: float32[8,2048]............................................. ('fsdp', None).
I0421 15:21:50.037398 128391294569600 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 15:21:50.038040 128391294569600 max_utils.py:194] tensorboardX not available; using no-op SummaryWriter.
I0421 15:21:50.038243 128391294569600 metric_logger.py:301] number parameters: 1.104 billion
I0421 15:22:00.727475 128391294569600 checkpointing.py:772] Waiting for step 0 to finish before checkpoint...
I0421 15:22:00.858294 128391294569600 checkpointing.py:776] Waited 0.13081789016723633 seconds for step 0 to finish before starting checkpointing.
I0421 15:22:00.858895 128391294569600 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0421 15:22:00.859099 128391294569600 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 0
I0421 15:22:00.859602 128391294569600 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_10_shardy_false/checkpoints/0.
I0421 15:22:00.969339 128391294569600 signaling_client.py:373] Using ThreadSafeKeyValueSignalingClient
I0421 15:22:01.077294 128391294569600 jax_array_handlers.py:347] Scheduling D2H of 39 prioritized jax.Array.
I0421 15:22:01.077399 128391294569600 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 15:22:01.084900 128299705566784 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_10_shardy_false/checkpoints/0
I0421 15:22:01.873416 128299695081024 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_10_shardy_false/checkpoints/0/items
I0421 15:22:01.983566 128391294569600 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.907171s
I0421 15:22:01.984082 128391294569600 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 12.176 GiB/s (total gbytes: 12.3 GiB) (time elapsed: a second) (per-host)
I0421 15:22:01.984134 128391294569600 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 1.013647s (batch_requests_ready=0.102219s, total_serialization_initiated=0.911020s, others=0.000408s)
I0421 15:22:01.984193 128391294569600 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.014300s (all_items=0.000033s, per_item={'items': '0.00003290'}, temp_paths=1.014267)
I0421 15:22:01.985058 128299642652224 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started.
I0421 15:22:01.985161 128391294569600 async_checkpointer.py:561] Finished blocking save. Time taken: 1.126018s. Continuing background save to gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_10_shardy_false/checkpoints/0.
I0421 15:22:01.985348 128391294569600 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0421 15:22:01.985631 128391294569600 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_10_shardy_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776784920.858882, 'wait_for_prev_duration_secs': 4.291534423828125e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776784920.8591225, 'checkpointer_blocking_duration_secs': 1.1261467933654785, 'get_old_steps_start_time': 1776784921.9852834, 'get_old_steps_duration_secs': 2.7179718017578125e-05, 'checkpoint_manager_blocking_start_time': 1776784920.8587751, 'checkpoint_manager_blocking_duration_secs': 1.1268348693847656}
I0421 15:22:01.985703 128391294569600 checkpointing.py:408] Started an asynchronous checkpoint save for step 0
I0421 15:22:01.985768 128391294569600 max_utils.py:750] 
Memstats: After params initialized:
I0421 15:22:01.985892 128391294569600 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_0(process=0,(0,0,0,0))
I0421 15:22:01.985918 128391294569600 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_1(process=0,(1,0,0,0))
I0421 15:22:01.985937 128391294569600 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_2(process=0,(0,1,0,0))
I0421 15:22:01.985954 128391294569600 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_3(process=0,(1,1,0,0))
I0421 15:22:01.985971 128391294569600 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_4(process=0,(0,2,0,0))
I0421 15:22:01.985988 128391294569600 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_5(process=0,(1,2,0,0))
I0421 15:22:01.986005 128391294569600 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_6(process=0,(0,3,0,0))
I0421 15:22:01.986021 128391294569600 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_7(process=0,(1,3,0,0))
I0421 15:22:02.049436 128299663623744 checkpoint.py:188] Wrote Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776784921792024846, 'commit_timestamp_nsecs': None, 'custom_metadata': {}}, json={"item_handlers": null, "metrics": {}, "performance_metrics": {}, "init_timestamp_nsecs": 1776784921792024846, "commit_timestamp_nsecs": null, "custom_metadata": {}} to gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_10_shardy_false/checkpoints/0/_CHECKPOINT_METADATA
I0421 15:22:02.049735 128299716052544 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save.
I0421 15:22:02.428544 1514632 google_auth_provider.cc:149] Using credentials at ~/.config/gcloud/application_default_credentials.json
I0421 15:22:02.428623 1514632 google_auth_provider.cc:156] Using OAuth2 AuthProvider
I0421 15:22:02.458585 128391294569600 metric_logger.py:196] completed step: 0, seconds: 10.688, TFLOP/s/device: 1.271, Tokens/s/device: 191.613, total_weights: 13328, loss: 10.828, lm_loss: 10.828, perplexity: 50404.086
I0421 15:22:02.459617 128391294569600 metric_logger.py:281] To see full metrics 'tensorboard --logdir=gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_10_shardy_false/tensorboard/'
I0421 15:22:02.560263 128391294569600 metric_logger.py:196] completed step: 1, seconds: 1.715, TFLOP/s/device: 7.922, Tokens/s/device: 1194.155, total_weights: 12332, loss: 10.828, lm_loss: 10.828, perplexity: 50391.758
I0421 15:22:02.677762 128391294569600 metric_logger.py:196] completed step: 2, seconds: 0.025, TFLOP/s/device: 546.238, Tokens/s/device: 82334.968, total_weights: 15161, loss: 9.823, lm_loss: 9.823, perplexity: 18444.867
I0421 15:22:02.795441 128391294569600 metric_logger.py:196] completed step: 3, seconds: 0.102, TFLOP/s/device: 132.757, Tokens/s/device: 20010.552, total_weights: 13327, loss: 9.405, lm_loss: 9.405, perplexity: 12149.331
I0421 15:22:19.078517 128391294569600 metric_logger.py:196] completed step: 4, seconds: 0.118, TFLOP/s/device: 115.589, Tokens/s/device: 17422.818, total_weights: 11939, loss: 9.045, lm_loss: 9.045, perplexity: 8471.842
I0421 15:22:19.079148 128299705566784 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_10_shardy_false/checkpoints/0/items/array_metadatas/process_0
I0421 15:22:19.103250 128391294569600 metric_logger.py:196] completed step: 5, seconds: 0.118, TFLOP/s/device: 115.563, Tokens/s/device: 17418.965, total_weights: 15502, loss: 8.953, lm_loss: 8.953, perplexity: 7728.546
I0421 15:22:19.220118 128391294569600 metric_logger.py:196] completed step: 6, seconds: 16.297, TFLOP/s/device: 0.834, Tokens/s/device: 125.667, total_weights: 13864, loss: 8.775, lm_loss: 8.775, perplexity: 6468.536
I0421 15:22:19.338004 128391294569600 metric_logger.py:196] completed step: 7, seconds: 0.008, TFLOP/s/device: 1707.140, Tokens/s/device: 257318.759, total_weights: 12988, loss: 8.688, lm_loss: 8.688, perplexity: 5928.887
I0421 15:22:19.455536 128391294569600 metric_logger.py:196] completed step: 8, seconds: 0.119, TFLOP/s/device: 114.576, Tokens/s/device: 17270.167, total_weights: 13820, loss: 8.740, lm_loss: 8.740, perplexity: 6250.123
I0421 15:22:19.572327 128391294569600 checkpointing.py:772] Waiting for step 9 to finish before checkpoint...
I0421 15:22:19.573720 128391294569600 checkpointing.py:776] Waited 0.0013623237609863281 seconds for step 9 to finish before starting checkpointing.
I0421 15:22:19.574291 128391294569600 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0421 15:22:44.970662 128299684595264 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 42.543107s (commit=42.094912s, array_metadata_write=0.448196s)
I0421 15:22:44.971832 128299642652224 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 287.191 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 44 seconds) (per-host)
I0421 15:22:44.971947 128299642652224 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.986740s.
I0421 15:22:45.221346 128299642652224 checkpoint.py:228] Read Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776784921792024846, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} from gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_10_shardy_false/checkpoints/0/_CHECKPOINT_METADATA
I0421 15:22:45.399846 128299642652224 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 15:22:45.610572 128299663623744 checkpoint.py:247] Updated Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776784921792024846, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} to gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_10_shardy_false/checkpoints/0/_CHECKPOINT_METADATA
I0421 15:22:45.840644 128299642652224 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389).
I0421 15:22:45.841256 128299642652224 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.578456s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_10_shardy_false/checkpoints/0/items
I0421 15:22:45.842005 128299642652224 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_10_shardy_false/checkpoints/0/items
I0421 15:22:46.088591 128299642652224 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_10_shardy_false/checkpoints/0
I0421 15:22:46.813628 128299642652224 atomicity.py:794] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_10_shardy_false/checkpoints/0`.
I0421 15:22:46.814392 128299642652224 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 45.955254s. directory=gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_10_shardy_false/checkpoints/0
I0421 15:22:46.814469 128299642652224 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 44.829264s.
I0421 15:22:46.814662 128299716052544 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save.
I0421 15:22:46.814774 128299716052544 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save.
I0421 15:22:46.814836 128299716052544 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0421 15:22:46.814879 128299716052544 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0421 15:22:46.815166 128391294569600 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 15:22:46.815310 128391294569600 checkpoint_manager.py:1441] Waiting for previous save to complete took 27.241044 seconds. If this number is high, consider checkpointing less frequently.
I0421 15:22:46.816184 128391294569600 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 9
I0421 15:22:46.816489 128391294569600 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_10_shardy_false/checkpoints/9.
I0421 15:22:46.988360 128299716052544 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_10_shardy_false/checkpoints/9
I0421 15:22:47.004764 128391294569600 jax_array_handlers.py:347] Scheduling D2H of 39 prioritized jax.Array.
I0421 15:22:47.004869 128391294569600 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 15:22:47.723594 128299653137984 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_10_shardy_false/checkpoints/9/items
I0421 15:22:53.127561 128391294569600 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 6.123280s
I0421 15:22:53.128156 128391294569600 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 1.981 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 6 seconds) (per-host)
I0421 15:22:53.128215 128391294569600 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 6.228968s (batch_requests_ready=0.102081s, total_serialization_initiated=6.126407s, others=0.000480s)
I0421 15:22:53.128282 128391294569600 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 6.229549s (all_items=0.000019s, per_item={'items': '0.00001931'}, temp_paths=6.229530)
I0421 15:22:53.133774 128299627972160 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started.
I0421 15:22:53.133878 128391294569600 async_checkpointer.py:561] Finished blocking save. Time taken: 6.317644s. Continuing background save to gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_10_shardy_false/checkpoints/9.
I0421 15:22:53.134092 128391294569600 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0421 15:22:53.134294 128299642652224 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save.
I0421 15:22:53.134423 128391294569600 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_10_shardy_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776784939.574236, 'wait_for_prev_duration_secs': 27.24104404449463, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776784966.816212, 'checkpointer_blocking_duration_secs': 6.317783832550049, 'get_old_steps_start_time': 1776784973.1340132, 'get_old_steps_duration_secs': 2.765655517578125e-05, 'checkpoint_manager_blocking_start_time': 1776784939.5741808, 'checkpoint_manager_blocking_duration_secs': 33.56021499633789}
I0421 15:22:53.134647 128391294569600 checkpointing.py:408] Started an asynchronous checkpoint save for step 9
I0421 15:22:53.134682 128391294569600 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0421 15:22:53.925249 128299705566784 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_10_shardy_false/checkpoints/9/items/array_metadatas/process_0
I0421 15:23:29.030208 128299653137984 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 35.897282s (commit=35.348211s, array_metadata_write=0.549071s)
I0421 15:23:29.031322 128299627972160 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 299.933 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 42 seconds) (per-host)
I0421 15:23:29.031378 128299627972160 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 35.897455s.
I0421 15:23:29.480080 128299627972160 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 15:23:29.915620 128299627972160 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389).
I0421 15:23:29.915812 128299627972160 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.586821s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_10_shardy_false/checkpoints/9/items
I0421 15:23:29.916544 128299627972160 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_10_shardy_false/checkpoints/9/items
I0421 15:23:30.173744 128299627972160 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_10_shardy_false/checkpoints/9
I0421 15:23:30.874174 128299627972160 atomicity.py:794] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_10_shardy_false/checkpoints/9`.
I0421 15:23:30.874914 128299627972160 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 44.058688s. directory=gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_10_shardy_false/checkpoints/9
I0421 15:23:30.874991 128299627972160 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 37.741068s.
I0421 15:23:30.875209 128299642652224 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save.
I0421 15:23:30.875334 128299642652224 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save.
I0421 15:23:30.875403 128299642652224 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0421 15:23:30.875441 128299642652224 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0421 15:23:30.875623 128391294569600 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 15:23:30.875766 128391294569600 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0421 15:23:30.876653 128391294569600 metric_logger.py:196] completed step: 9, seconds: 0.119, TFLOP/s/device: 114.304, Tokens/s/device: 17229.195, 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
feat/nnx-trainstate-and-training-loop  ·  29bbe47ed  ·  feat_nnx_trainstate_and_training_loop_20260421_161934  ·  full log 
2026-04-21 16:53:00.241705: 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 00:00:1776790380.251737 1623601 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered
E0000 00:00:1776790380.254854 1623601 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered
W0000 00:00:1776790380.264619 1623601 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776790380.264629 1623601 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776790380.264631 1623601 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776790380.264632 1623601 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 16:53:03.942334: 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 16:53:04.080674 138553583582336 max_utils.py:238] Skipping jax distributed system due to skip_jax_distributed_system=True flag.
I0421 16:53:31.711067 138553583582336 max_utils.py:800] System Information: Jax Version: 0.8.1
I0421 16:53:31.711334 138553583582336 max_utils.py:801] System Information: Jaxlib Version: 0.8.1
I0421 16:53:31.711381 138553583582336 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 16:53:31.711410 138553583582336 train_utils.py:378] WARNING: 'dataset_path' might be pointing your local file system
I0421 16:53:31.711583 138553583582336 train.py:806] [DECOUPLED NO-OP] skipping cloud diagnostics wrapper.
I0421 16:53:32.344282 138553583582336 maxtext_utils.py:1732] Num_devices: 8, shape (1, 1, 1, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0421 16:53:32.344468 138553583582336 maxtext_utils.py:1732] Num_devices: 8, shape (1, 1, 1, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0421 16:53:32.344631 138553583582336 checkpointing.py:688] Setting up checkpoint logger...
I0421 16:53:32.344674 138553583582336 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True
I0421 16:53:32.344712 138553583582336 pytree_checkpoint_handler.py:577] save_device_host_concurrent_bytes=None
I0421 16:53:32.345154 138553583582336 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 0x7e033b7af170>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0421 16:53:34.887912 138553583582336 checkpointing.py:266] Enabling policy for fixed interval checkpointing.
I0421 16:53:34.888119 138553583582336 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 0x7e01e47469f0>}, handler_registry=None
I0421 16:53:34.888348 138553583582336 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e01e47469f0>` 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 16:53:34.888388 138553583582336 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e019317eba0>` 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 16:53:34.888417 138553583582336 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 0x7e01e47469f0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e01e47469f0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e019317eba0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e019317eba0>}).
I0421 16:53:34.888685 138553583582336 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.28
I0421 16:53:34.888746 138553583582336 async_checkpointer.py:177] [process=0][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>.<lambda> at 0x7e01931a4ae0> timeout: 600 secs and primary_host=0 for async checkpoint writes
I0421 16:53:35.011926 138553583582336 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_10_shardy_false/checkpoints
I0421 16:53:35.012187 138553583582336 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_10_shardy_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7e019317e6f0>
I0421 16:53:35.012269 138553583582336 checkpointing.py:302] Checkpoint manager created!
I0421 16:53:35.090064 138553583582336 dataset_info.py:707] Load dataset info from tests/assets/local_datasets/c4_en_dataset_minimal/c4/en/3.1.0
I0421 16:53:35.092943 138553583582336 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 16:53:35.147693 138553583582336 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 16:53:35.170267 138553583582336 tokenizer.py:245] Tokenizer path: src/maxtext/assets/tokenizers/tokenizer.llama2
I0421 16:53:35.170332 138553583582336 tokenizer.py:187] Loading sentencepiece tokenizer: src/maxtext/assets/tokenizers/tokenizer.llama2
I0421 16:53:35.769646 138553583582336 nnx_wrappers.py:437] Unknown Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0421 16:53:35.769752 138553583582336 nnx_wrappers.py:437] Unknown Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None).
I0421 16:53:36.073713 138553583582336 attentions.py:1088] attentions/inputs_q Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0421 16:53:36.073809 138553583582336 attentions.py:1088] attentions/inputs_q Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None).
I0421 16:53:36.086398 138553583582336 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0421 16:53:36.086447 138553583582336 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None).
I0421 16:53:36.105336 138553583582336 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 16:53:36.105397 138553583582336 attentions.py:1154] attentions/query Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None).
I0421 16:53:36.118072 138553583582336 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 16:53:36.118126 138553583582336 attentions.py:1155] attentions/key Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None).
I0421 16:53:36.130718 138553583582336 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 16:53:36.130771 138553583582336 attentions.py:1156] attentions/value Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None).
I0421 16:53:36.150618 138553583582336 attentions.py:1198] attentions/out Logical: bfloat16[8,2048,16,128]..................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0421 16:53:36.150681 138553583582336 attentions.py:1198] attentions/out Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None).
I0421 16:53:36.166486 138553583582336 linears.py:525] linears/x Logical: bfloat16[8,2048,7168]....................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0421 16:53:36.166542 138553583582336 linears.py:525] linears/x Physical: bfloat16[8,2048,7168]....................................... ('fsdp', None, None).
I0421 16:53:36.319937 138553583582336 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint
I0421 16:53:36.320056 138553583582336 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 16:53:36.934750 138553583582336 maxtext_utils.py:1835]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   PartitionSpec('norm',)
    Physical:  (None,)
I0421 16:53:36.934868 138553583582336 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 16:53:36.934910 138553583582336 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 16:53:36.934955 138553583582336 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 16:53:36.935001 138553583582336 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 16:53:36.935030 138553583582336 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 16:53:36.935090 138553583582336 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 16:53:36.935133 138553583582336 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 16:53:36.935163 138553583582336 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 16:53:36.935190 138553583582336 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 16:53:36.935226 138553583582336 maxtext_utils.py:1835]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   PartitionSpec('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)
I0421 16:53:36.935261 138553583582336 maxtext_utils.py:1835]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   PartitionSpec('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')

I0421 16:53:37.608507 138553583582336 train.py:157] train/xent Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length').
I0421 16:53:37.608597 138553583582336 train.py:157] train/xent Physical: float32[8,2048]............................................. ('fsdp', None).
I0421 16:53:37.620520 138553583582336 train.py:164] train/z_loss Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length').
I0421 16:53:37.620574 138553583582336 train.py:164] train/z_loss Physical: float32[8,2048]............................................. ('fsdp', None).
I0421 16:53:38.363970 138553583582336 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 16:53:38.364682 138553583582336 max_utils.py:194] tensorboardX not available; using no-op SummaryWriter.
I0421 16:53:38.364920 138553583582336 metric_logger.py:301] number parameters: 1.104 billion
I0421 16:53:42.671830 138553583582336 checkpointing.py:794] Waiting for step 0 to finish before checkpoint...
I0421 16:53:42.793759 138553583582336 checkpointing.py:798] Waited 0.12194204330444336 seconds for step 0 to finish before starting checkpointing.
I0421 16:53:42.794447 138553583582336 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0421 16:53:42.794648 138553583582336 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 0
I0421 16:53:42.795307 138553583582336 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_10_shardy_false/checkpoints/0.
I0421 16:53:42.886702 138553583582336 signaling_client.py:373] Using ThreadSafeKeyValueSignalingClient
I0421 16:53:42.980993 138462982309440 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_10_shardy_false/checkpoints/0
I0421 16:53:42.992264 138553583582336 jax_array_handlers.py:347] Scheduling D2H of 39 prioritized jax.Array.
I0421 16:53:42.992361 138553583582336 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 16:53:43.630827 138553583582336 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.639027s
I0421 16:53:43.631221 138553583582336 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 16.611 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 742 milliseconds) (per-host)
I0421 16:53:43.631277 138553583582336 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 0.743064s (batch_requests_ready=0.100155s, total_serialization_initiated=0.642622s, others=0.000287s)
I0421 16:53:43.631340 138553583582336 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.744024s (all_items=0.000033s, per_item={'items': '0.00003338'}, temp_paths=0.743990)
I0421 16:53:43.632118 138462911006272 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started.
I0421 16:53:43.632219 138553583582336 async_checkpointer.py:561] Finished blocking save. Time taken: 0.837526s. 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_10_shardy_false/checkpoints/0.
I0421 16:53:43.632418 138553583582336 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0421 16:53:43.632566 138462992795200 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save.
I0421 16:53:43.632642 138553583582336 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_10_shardy_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776790422.7944288, 'wait_for_prev_duration_secs': 4.9591064453125e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776790422.7946706, 'checkpointer_blocking_duration_secs': 0.8376493453979492, 'get_old_steps_start_time': 1776790423.6323392, 'get_old_steps_duration_secs': 3.743171691894531e-05, 'checkpoint_manager_blocking_start_time': 1776790422.7942703, 'checkpoint_manager_blocking_duration_secs': 0.8383340835571289}
I0421 16:53:43.632753 138553583582336 checkpointing.py:409] Started an asynchronous checkpoint save for step 0
I0421 16:53:43.632795 138553583582336 max_utils.py:750] 
Memstats: After params initialized:
I0421 16:53:43.632872 138553583582336 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_0(process=0,(0,0,0,0))
I0421 16:53:43.632899 138553583582336 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_1(process=0,(1,0,0,0))
I0421 16:53:43.632919 138553583582336 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_2(process=0,(0,1,0,0))
I0421 16:53:43.632936 138553583582336 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_3(process=0,(1,1,0,0))
I0421 16:53:43.632953 138553583582336 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_4(process=0,(0,2,0,0))
I0421 16:53:43.632969 138553583582336 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_5(process=0,(1,2,0,0))
I0421 16:53:43.632985 138553583582336 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_6(process=0,(0,3,0,0))
I0421 16:53:43.633000 138553583582336 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_7(process=0,(1,3,0,0))
I0421 16:53:43.787125 138462971823680 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_10_shardy_false/checkpoints/0/items
I0421 16:53:44.025839 138553583582336 metric_logger.py:196] completed step: 0, seconds: 4.306, TFLOP/s/device: 3.155, Tokens/s/device: 475.590, total_weights: 13328, loss: 10.828, lm_loss: 10.828, perplexity: 50404.086
I0421 16:53:44.026849 138553583582336 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_10_shardy_false/tensorboard/'
I0421 16:53:44.141948 138553583582336 metric_logger.py:196] completed step: 1, seconds: 1.352, TFLOP/s/device: 10.051, Tokens/s/device: 1514.988, total_weights: 12332, loss: 10.828, lm_loss: 10.828, perplexity: 50391.758
I0421 16:53:44.153377 138462896326208 checkpoint.py:188] Wrote Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776790423700655550, 'commit_timestamp_nsecs': None, 'custom_metadata': {}}, json={"item_handlers": null, "metrics": {}, "performance_metrics": {}, "init_timestamp_nsecs": 1776790423700655550, "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_10_shardy_false/checkpoints/0/_CHECKPOINT_METADATA
I0421 16:53:44.259561 138553583582336 metric_logger.py:196] completed step: 2, seconds: 0.010, TFLOP/s/device: 1391.981, Tokens/s/device: 209814.568, total_weights: 15161, loss: 9.823, lm_loss: 9.823, perplexity: 18444.867
I0421 16:53:44.318509 1625973 google_auth_provider.cc:149] Using credentials at ~/.config/gcloud/application_default_credentials.json
I0421 16:53:44.318588 1625973 google_auth_provider.cc:156] Using OAuth2 AuthProvider
I0421 16:53:44.377277 138553583582336 metric_logger.py:196] completed step: 3, seconds: 0.117, TFLOP/s/device: 115.796, Tokens/s/device: 17454.000, total_weights: 13327, loss: 9.405, lm_loss: 9.405, perplexity: 12149.331
I0421 16:53:59.784267 138553583582336 metric_logger.py:196] completed step: 4, seconds: 0.117, TFLOP/s/device: 115.656, Tokens/s/device: 17432.903, total_weights: 11939, loss: 9.045, lm_loss: 9.045, perplexity: 8471.842
I0421 16:53:59.809912 138553583582336 metric_logger.py:196] completed step: 5, seconds: 0.118, TFLOP/s/device: 115.295, Tokens/s/device: 17378.465, total_weights: 15502, loss: 8.953, lm_loss: 8.953, perplexity: 7728.546
I0421 16:53:59.926981 138553583582336 metric_logger.py:196] completed step: 6, seconds: 15.423, TFLOP/s/device: 0.881, Tokens/s/device: 132.792, total_weights: 13864, loss: 8.775, lm_loss: 8.775, perplexity: 6468.536
I0421 16:54:00.044716 138553583582336 metric_logger.py:196] completed step: 7, seconds: 0.007, TFLOP/s/device: 2064.913, Tokens/s/device: 311246.201, total_weights: 12988, loss: 8.688, lm_loss: 8.688, perplexity: 5928.887
I0421 16:54:00.111789 138462931977792 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_10_shardy_false/checkpoints/0/items/array_metadatas/process_0
I0421 16:54:00.162537 138553583582336 metric_logger.py:196] completed step: 8, seconds: 0.119, TFLOP/s/device: 114.522, Tokens/s/device: 17262.015, total_weights: 13820, loss: 8.740, lm_loss: 8.740, perplexity: 6250.123
I0421 16:54:00.279443 138553583582336 checkpointing.py:794] Waiting for step 9 to finish before checkpoint...
I0421 16:54:00.280441 138553583582336 checkpointing.py:798] Waited 0.001125335693359375 seconds for step 9 to finish before starting checkpointing.
I0421 16:54:00.280856 138553583582336 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0421 16:54:28.652073 138462921492032 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 44.330946s (commit=43.884240s, array_metadata_write=0.446706s)
I0421 16:54:28.653174 138462911006272 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 276.124 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 45 seconds) (per-host)
I0421 16:54:28.653243 138462911006272 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 45.020974s.
I0421 16:54:28.934946 138462911006272 checkpoint.py:228] Read Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776790423700655550, '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_10_shardy_false/checkpoints/0/_CHECKPOINT_METADATA
I0421 16:54:29.133163 138462911006272 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 16:54:29.332904 138462896326208 checkpoint.py:247] Updated Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776790423700655550, '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_10_shardy_false/checkpoints/0/_CHECKPOINT_METADATA
I0421 16:54:29.549150 138462911006272 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389).
I0421 16:54:29.549805 138462911006272 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.575669s. 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_10_shardy_false/checkpoints/0/items
I0421 16:54:29.550592 138462911006272 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_10_shardy_false/checkpoints/0/items
I0421 16:54:29.799144 138462911006272 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_10_shardy_false/checkpoints/0
I0421 16:54:30.492649 138462911006272 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_10_shardy_false/checkpoints/0`.
I0421 16:54:30.493419 138462911006272 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 47.698727s. directory=gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/linen_feat_nnx_trainstate_and_training_loop_20260421_161934_10_shardy_false/checkpoints/0
I0421 16:54:30.493507 138462911006272 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 46.861241s.
I0421 16:54:30.493634 138462992795200 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save.
I0421 16:54:30.493693 138462992795200 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save.
I0421 16:54:30.493763 138462992795200 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0421 16:54:30.493814 138462992795200 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0421 16:54:30.494175 138553583582336 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 16:54:30.494325 138553583582336 checkpoint_manager.py:1441] Waiting for previous save to complete took 30.213506 seconds. If this number is high, consider checkpointing less frequently.
I0421 16:54:30.495534 138553583582336 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 9
I0421 16:54:30.495882 138553583582336 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_10_shardy_false/checkpoints/9.
I0421 16:54:30.683584 138462992795200 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_10_shardy_false/checkpoints/9
I0421 16:54:30.704358 138553583582336 jax_array_handlers.py:347] Scheduling D2H of 39 prioritized jax.Array.
I0421 16:54:30.704462 138553583582336 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 16:54:31.467938 138462797760064 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_10_shardy_false/checkpoints/9/items
I0421 16:54:35.602881 138553583582336 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 4.898973s
I0421 16:54:35.607312 138553583582336 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.462 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 5 seconds) (per-host)
I0421 16:54:35.607389 138553583582336 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 5.013547s (batch_requests_ready=0.107119s, total_serialization_initiated=4.902132s, others=0.004297s)
I0421 16:54:35.607468 138553583582336 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 5.014140s (all_items=0.000026s, per_item={'items': '0.00002575'}, temp_paths=5.014114)
I0421 16:54:35.609094 138462992795200 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started.
I0421 16:54:35.609180 138553583582336 async_checkpointer.py:561] Finished blocking save. Time taken: 5.113598s. 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_10_shardy_false/checkpoints/9.
I0421 16:54:35.609391 138553583582336 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0421 16:54:35.609575 138462911006272 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save.
I0421 16:54:35.609681 138553583582336 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_10_shardy_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776790440.2807865, 'wait_for_prev_duration_secs': 30.213505744934082, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776790470.4955578, 'checkpointer_blocking_duration_secs': 5.113730430603027, 'get_old_steps_start_time': 1776790475.6093025, 'get_old_steps_duration_secs': 4.482269287109375e-05, 'checkpoint_manager_blocking_start_time': 1776790440.2807057, 'checkpoint_manager_blocking_duration_secs': 35.32894730567932}
I0421 16:54:35.609797 138553583582336 checkpointing.py:409] Started an asynchronous checkpoint save for step 9
I0421 16:54:35.609835 138553583582336 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0421 16:54:36.404440 138462982309440 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_10_shardy_false/checkpoints/9/items/array_metadatas/process_0
I0421 16:55:13.431316 138462797760064 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 37.823177s (commit=37.340302s, array_metadata_write=0.482876s)
I0421 16:55:13.432648 138462992795200 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 294.985 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 42 seconds) (per-host)
I0421 16:55:13.432714 138462992795200 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 37.823484s.
I0421 16:55:13.885696 138462992795200 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 16:55:14.347754 138462992795200 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389).
I0421 16:55:14.348459 138462992795200 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.629546s. 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_10_shardy_false/checkpoints/9/items
I0421 16:55:14.349263 138462992795200 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_10_shardy_false/checkpoints/9/items
I0421 16:55:14.608383 138462992795200 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_10_shardy_false/checkpoints/9
I0421 16:55:15.312906 138462992795200 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_10_shardy_false/checkpoints/9`.
I0421 16:55:15.313671 138462992795200 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 44.818093s. directory=gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/linen_feat_nnx_trainstate_and_training_loop_20260421_161934_10_shardy_false/checkpoints/9
I0421 16:55:15.313755 138462992795200 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 39.704531s.
I0421 16:55:15.314031 138462911006272 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save.
I0421 16:55:15.314174 138462911006272 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save.
I0421 16:55:15.314282 138462911006272 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0421 16:55:15.314336 138462911006272 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0421 16:55:15.314495 138553583582336 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 16:55:15.314657 138553583582336 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0421 16:55:15.319881 138553583582336 metric_logger.py:196] completed step: 9, seconds: 0.119, TFLOP/s/device: 114.141, Tokens/s/device: 17204.590, 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