feat/nnx-trainstate-and-training-loop| Metric | Linen 29bbe47ed | NNX 29bbe47ed | Diff (NNX − Linen) |
|---|---|---|---|
| Parameters | 1.104 billion | 1.104 billion | — |
| Final loss | 8.7740 | 8.7550 | -0.019 |
| TFLOP/s | 113.568 | 112.017 | -1.551 |
| Tok/s | 17118.2 | 16884.5 | -233.709 |
| Avg s/step | 2.187 | 2.409 | +0.222 |
| Memory % | 5.12 | 5.12 | 0 |
| JAX | 0.8.1 | 0.8.1 | — |
Diff = NNX value − Linen value. Green = NNX improved. Red = NNX regressed.
2026-04-21 16:27:41.043432: 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 00:00:1776788861.054774 1600984 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered E0000 00:00:1776788861.057939 1600984 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered W0000 00:00:1776788861.067949 1600984 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776788861.067961 1600984 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776788861.067963 1600984 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776788861.067964 1600984 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 16:27:44.754250: 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 16:27:44.889400 123712546376832 max_utils.py:238] Skipping jax distributed system due to skip_jax_distributed_system=True flag. I0421 16:28:12.466075 123712546376832 max_utils.py:800] System Information: Jax Version: 0.8.1 I0421 16:28:12.466250 123712546376832 max_utils.py:801] System Information: Jaxlib Version: 0.8.1 I0421 16:28:12.466285 123712546376832 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 16:28:12.466316 123712546376832 train_utils.py:378] WARNING: 'dataset_path' might be pointing your local file system I0421 16:28:12.466440 123712546376832 train.py:806] [DECOUPLED NO-OP] skipping cloud diagnostics wrapper. I0421 16:28:13.090027 123712546376832 maxtext_utils.py:1732] Num_devices: 8, shape (1, 1, 1, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0421 16:28:13.090226 123712546376832 maxtext_utils.py:1732] Num_devices: 8, shape (1, 1, 1, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0421 16:28:13.090480 123712546376832 checkpointing.py:688] Setting up checkpoint logger... I0421 16:28:13.090523 123712546376832 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0421 16:28:13.090559 123712546376832 pytree_checkpoint_handler.py:577] save_device_host_concurrent_bytes=None I0421 16:28:13.090990 123712546376832 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 0x7083c61a2180>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0421 16:28:15.470865 123712546376832 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0421 16:28:15.471290 123712546376832 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 0x708271ba2ab0>}, handler_registry=None I0421 16:28:15.471794 123712546376832 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x708271ba2ab0>` 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 16:28:15.471843 123712546376832 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x70821e18d910>` 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 16:28:15.471878 123712546376832 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 0x708271ba2ab0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x708271ba2ab0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x70821e18d910>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x70821e18d910>}). I0421 16:28:15.472384 123712546376832 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.28 I0421 16:28:15.472459 123712546376832 async_checkpointer.py:177] [process=0][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>.<lambda> at 0x70821e1b4ae0> timeout: 600 secs and primary_host=0 for async checkpoint writes I0421 16:28:15.608985 123712546376832 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_04_int8/checkpoints I0421 16:28:15.609282 123712546376832 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_04_int8/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x70821e18db50> I0421 16:28:15.609383 123712546376832 checkpointing.py:302] Checkpoint manager created! I0421 16:28:15.690687 123712546376832 dataset_info.py:707] Load dataset info from tests/assets/local_datasets/c4_en_dataset_minimal/c4/en/3.1.0 I0421 16:28:15.693776 123712546376832 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 16:28:15.747847 123712546376832 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 16:28:15.771560 123712546376832 tokenizer.py:245] Tokenizer path: src/maxtext/assets/tokenizers/tokenizer.llama2 I0421 16:28:15.771626 123712546376832 tokenizer.py:187] Loading sentencepiece tokenizer: src/maxtext/assets/tokenizers/tokenizer.llama2 I0421 16:28:16.621737 123712546376832 nnx_wrappers.py:437] Unknown Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0421 16:28:16.621839 123712546376832 nnx_wrappers.py:437] Unknown Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0421 16:28:16.937729 123712546376832 attentions.py:1088] attentions/inputs_q Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0421 16:28:16.937818 123712546376832 attentions.py:1088] attentions/inputs_q Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0421 16:28:16.950384 123712546376832 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0421 16:28:16.950434 123712546376832 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0421 16:28:17.015053 123712546376832 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 16:28:17.015138 123712546376832 attentions.py:1154] attentions/query Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0421 16:28:17.027887 123712546376832 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 16:28:17.027941 123712546376832 attentions.py:1155] attentions/key Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0421 16:28:17.040457 123712546376832 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 16:28:17.040509 123712546376832 attentions.py:1156] attentions/value Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0421 16:28:17.060127 123712546376832 attentions.py:1198] attentions/out Logical: bfloat16[8,2048,16,128]..................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0421 16:28:17.060187 123712546376832 attentions.py:1198] attentions/out Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0421 16:28:17.126178 123712546376832 linears.py:525] linears/x Logical: bfloat16[8,2048,7168]....................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0421 16:28:17.126256 123712546376832 linears.py:525] linears/x Physical: bfloat16[8,2048,7168]....................................... ('fsdp', None, None). I0421 16:28:17.891815 123712546376832 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0421 16:28:17.891920 123712546376832 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 16:28:19.159794 123712546376832 maxtext_utils.py:1835] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: PartitionSpec('norm',) Physical: (None,) I0421 16:28:19.159912 123712546376832 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 16:28:19.159956 123712546376832 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 16:28:19.160011 123712546376832 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 16:28:19.160067 123712546376832 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 16:28:19.160100 123712546376832 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 16:28:19.160143 123712546376832 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 16:28:19.160184 123712546376832 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 16:28:19.160215 123712546376832 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 16:28:19.160242 123712546376832 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 16:28:19.160278 123712546376832 maxtext_utils.py:1835] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: PartitionSpec('embed_vocab', 'vocab') Physical: ('fsdp', None) I0421 16:28:19.160314 123712546376832 maxtext_utils.py:1835] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: PartitionSpec('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0421 16:28:20.898105 123712546376832 train.py:157] train/xent Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length'). I0421 16:28:20.898203 123712546376832 train.py:157] train/xent Physical: float32[8,2048]............................................. ('fsdp', None). I0421 16:28:20.910567 123712546376832 train.py:164] train/z_loss Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length'). I0421 16:28:20.910618 123712546376832 train.py:164] train/z_loss Physical: float32[8,2048]............................................. ('fsdp', None). I0421 16:28:22.796745 123712546376832 max_utils.py:791] Total memory size: 3.7 GB, Output size: 1.5 GB, Temp size: 2.2 GB, Argument size: 1.5 GB, Host temp size: 0.0 GB. I0421 16:28:22.797416 123712546376832 max_utils.py:194] tensorboardX not available; using no-op SummaryWriter. I0421 16:28:22.797574 123712546376832 metric_logger.py:301] number parameters: 1.104 billion I0421 16:28:29.203097 123712546376832 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0421 16:28:29.327785 123712546376832 checkpointing.py:798] Waited 0.12466716766357422 seconds for step 0 to finish before starting checkpointing. I0421 16:28:29.328277 123712546376832 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0421 16:28:29.328435 123712546376832 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 0 I0421 16:28:29.328834 123712546376832 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_04_int8/checkpoints/0. I0421 16:28:29.432841 123712546376832 signaling_client.py:373] Using ThreadSafeKeyValueSignalingClient I0421 16:28:29.518398 123712546376832 jax_array_handlers.py:347] Scheduling D2H of 39 prioritized jax.Array. I0421 16:28:29.518494 123712546376832 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 16:28:29.525696 123621418731072 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_04_int8/checkpoints/0 I0421 16:28:30.262223 123621408245312 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_04_int8/checkpoints/0/items I0421 16:28:30.314634 123712546376832 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.796650s I0421 16:28:30.315144 123712546376832 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 14.010 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 880 milliseconds) (per-host) I0421 16:28:30.315197 123712546376832 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 0.880919s (batch_requests_ready=0.080095s, total_serialization_initiated=0.800432s, others=0.000392s) I0421 16:28:30.315257 123712546376832 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.881850s (all_items=0.000020s, per_item={'items': '0.00001955'}, temp_paths=0.881830) I0421 16:28:30.316155 123621355816512 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0421 16:28:30.316252 123712546376832 async_checkpointer.py:561] Finished blocking save. Time taken: 0.987776s. 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_04_int8/checkpoints/0. I0421 16:28:30.316433 123712546376832 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0421 16:28:30.316665 123712546376832 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_04_int8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776788909.3282635, 'wait_for_prev_duration_secs': 4.410743713378906e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776788909.3284578, 'checkpointer_blocking_duration_secs': 0.9879040718078613, 'get_old_steps_start_time': 1776788910.316378, 'get_old_steps_duration_secs': 2.0265579223632812e-05, 'checkpoint_manager_blocking_start_time': 1776788909.3281803, 'checkpoint_manager_blocking_duration_secs': 0.9884614944458008} I0421 16:28:30.316742 123712546376832 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0421 16:28:30.316779 123712546376832 max_utils.py:750] Memstats: After params initialized: I0421 16:28:30.316854 123712546376832 max_utils.py:756] Using (GB) 1.6 / 31.25 (5.120000%) on TPU_0(process=0,(0,0,0,0)) I0421 16:28:30.316880 123712546376832 max_utils.py:756] Using (GB) 1.6 / 31.25 (5.120000%) on TPU_1(process=0,(1,0,0,0)) I0421 16:28:30.316899 123712546376832 max_utils.py:756] Using (GB) 1.6 / 31.25 (5.120000%) on TPU_2(process=0,(0,1,0,0)) I0421 16:28:30.316917 123712546376832 max_utils.py:756] Using (GB) 1.6 / 31.25 (5.120000%) on TPU_3(process=0,(1,1,0,0)) I0421 16:28:30.316936 123712546376832 max_utils.py:756] Using (GB) 1.6 / 31.25 (5.120000%) on TPU_4(process=0,(0,2,0,0)) I0421 16:28:30.316954 123712546376832 max_utils.py:756] Using (GB) 1.6 / 31.25 (5.120000%) on TPU_5(process=0,(1,2,0,0)) I0421 16:28:30.316971 123712546376832 max_utils.py:756] Using (GB) 1.6 / 31.25 (5.120000%) on TPU_6(process=0,(0,3,0,0)) I0421 16:28:30.316987 123712546376832 max_utils.py:756] Using (GB) 1.6 / 31.25 (5.120000%) on TPU_7(process=0,(1,3,0,0)) I0421 16:28:30.412206 123621376788032 checkpoint.py:188] Wrote Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776788910165212360, 'commit_timestamp_nsecs': None, 'custom_metadata': {}}, json={"item_handlers": null, "metrics": {}, "performance_metrics": {}, "init_timestamp_nsecs": 1776788910165212360, "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_04_int8/checkpoints/0/_CHECKPOINT_METADATA I0421 16:28:30.412451 123621429216832 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0421 16:28:30.718971 123712546376832 metric_logger.py:196] completed step: 0, seconds: 6.405, TFLOP/s/device: 2.121, Tokens/s/device: 319.754, total_weights: 13328, loss: 10.840, lm_loss: 10.840, perplexity: 51025.957 I0421 16:28:30.719966 123712546376832 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_04_int8/tensorboard/' I0421 16:28:30.741635 1603380 google_auth_provider.cc:149] Using credentials at ~/.config/gcloud/application_default_credentials.json I0421 16:28:30.741704 1603380 google_auth_provider.cc:156] Using OAuth2 AuthProvider I0421 16:28:30.837996 123712546376832 metric_logger.py:196] completed step: 1, seconds: 1.514, TFLOP/s/device: 8.975, Tokens/s/device: 1352.862, total_weights: 12332, loss: 10.869, lm_loss: 10.869, perplexity: 52515.969 I0421 16:28:30.959506 123712546376832 metric_logger.py:196] completed step: 2, seconds: 0.010, TFLOP/s/device: 1331.158, Tokens/s/device: 200646.615, total_weights: 15161, loss: 9.874, lm_loss: 9.874, perplexity: 19421.770 I0421 16:28:31.080895 123712546376832 metric_logger.py:196] completed step: 3, seconds: 0.120, TFLOP/s/device: 113.278, Tokens/s/device: 17074.492, total_weights: 13327, loss: 9.406, lm_loss: 9.406, perplexity: 12166.079 I0421 16:28:48.602174 123621397759552 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_04_int8/checkpoints/0/items/array_metadatas/process_0 I0421 16:28:48.602832 123712546376832 metric_logger.py:196] completed step: 4, seconds: 0.122, TFLOP/s/device: 111.735, Tokens/s/device: 16841.967, total_weights: 11939, loss: 9.149, lm_loss: 9.149, perplexity: 9403.998 I0421 16:28:48.636064 123712546376832 metric_logger.py:196] completed step: 5, seconds: 0.122, TFLOP/s/device: 111.496, Tokens/s/device: 16805.895, total_weights: 15502, loss: 9.058, lm_loss: 9.058, perplexity: 8587.564 I0421 16:28:48.755843 123712546376832 metric_logger.py:196] completed step: 6, seconds: 17.544, TFLOP/s/device: 0.774, Tokens/s/device: 116.735, total_weights: 13864, loss: 8.892, lm_loss: 8.892, perplexity: 7274.692 I0421 16:28:48.877773 123712546376832 metric_logger.py:196] completed step: 7, seconds: 0.009, TFLOP/s/device: 1528.189, Tokens/s/device: 230345.293, total_weights: 12988, loss: 8.751, lm_loss: 8.751, perplexity: 6314.503 I0421 16:28:48.999675 123712546376832 metric_logger.py:196] completed step: 8, seconds: 0.124, TFLOP/s/device: 109.180, Tokens/s/device: 16456.805, total_weights: 13820, loss: 8.791, lm_loss: 8.791, perplexity: 6573.798 I0421 16:28:49.120603 123712546376832 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0421 16:28:49.121781 123712546376832 checkpointing.py:798] Waited 0.0012476444244384766 seconds for step 9 to finish before starting checkpointing. I0421 16:28:49.122420 123712546376832 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0421 16:29:19.180872 123621418731072 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 48.443912s (commit=47.993087s, array_metadata_write=0.450825s) I0421 16:29:19.182261 123621355816512 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 254.016 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 49 seconds) (per-host) I0421 16:29:19.182394 123621355816512 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 48.866088s. I0421 16:29:19.415173 123621355816512 checkpoint.py:228] Read Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776788910165212360, '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_04_int8/checkpoints/0/_CHECKPOINT_METADATA I0421 16:29:19.602088 123621355816512 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 16:29:19.801367 123621376788032 checkpoint.py:247] Updated Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776788910165212360, '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_04_int8/checkpoints/0/_CHECKPOINT_METADATA I0421 16:29:20.005316 123621355816512 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389). I0421 16:29:20.005931 123621355816512 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.541293s. 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_04_int8/checkpoints/0/items I0421 16:29:20.006700 123621355816512 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_04_int8/checkpoints/0/items I0421 16:29:20.262058 123621355816512 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_04_int8/checkpoints/0 I0421 16:29:20.939651 123621355816512 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_04_int8/checkpoints/0`. I0421 16:29:20.940434 123621355816512 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 51.611962s. directory=gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/linen_feat_nnx_trainstate_and_training_loop_20260421_161934_04_int8/checkpoints/0 I0421 16:29:20.940529 123621355816512 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 50.624228s. I0421 16:29:20.940789 123621429216832 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0421 16:29:20.940925 123621429216832 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0421 16:29:20.941004 123621429216832 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0421 16:29:20.941079 123621429216832 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0421 16:29:20.941661 123712546376832 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 16:29:20.941803 123712546376832 checkpoint_manager.py:1441] Waiting for previous save to complete took 31.819582 seconds. If this number is high, consider checkpointing less frequently. I0421 16:29:20.943107 123712546376832 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 9 I0421 16:29:20.943444 123712546376832 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_04_int8/checkpoints/9. I0421 16:29:21.133157 123712546376832 jax_array_handlers.py:347] Scheduling D2H of 39 prioritized jax.Array. I0421 16:29:21.133260 123712546376832 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 16:29:21.140641 123621429216832 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_04_int8/checkpoints/9 I0421 16:29:21.866411 123621418731072 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_04_int8/checkpoints/9/items I0421 16:29:33.022023 123712546376832 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 11.889357s I0421 16:29:33.027979 123712546376832 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 1.029 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 11 seconds) (per-host) I0421 16:29:33.028078 123712546376832 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 11.987642s (batch_requests_ready=0.089097s, total_serialization_initiated=11.892840s, others=0.005705s) I0421 16:29:33.028183 123712546376832 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 11.988287s (all_items=0.000026s, per_item={'items': '0.00002623'}, temp_paths=11.988261) I0421 16:29:33.029986 123621429216832 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0421 16:29:33.030108 123712546376832 async_checkpointer.py:561] Finished blocking save. Time taken: 12.086948s. 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_04_int8/checkpoints/9. I0421 16:29:33.030405 123712546376832 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0421 16:29:33.030644 123621320164928 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0421 16:29:33.030762 123712546376832 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_04_int8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776788929.1221898, 'wait_for_prev_duration_secs': 31.819581985473633, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776788960.943134, 'checkpointer_blocking_duration_secs': 12.0870943069458, 'get_old_steps_start_time': 1776788973.0302637, 'get_old_steps_duration_secs': 5.9604644775390625e-05, 'checkpoint_manager_blocking_start_time': 1776788929.1220582, 'checkpoint_manager_blocking_duration_secs': 43.90866470336914} I0421 16:29:33.030900 123712546376832 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0421 16:29:33.030942 123712546376832 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0421 16:29:33.771510 123620741350976 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_04_int8/checkpoints/9/items/array_metadatas/process_0 I0421 16:30:11.138519 123621397759552 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 38.109770s (commit=37.633187s, array_metadata_write=0.476582s) I0421 16:30:11.139786 123621429216832 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 252.235 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 50 seconds) (per-host) I0421 16:30:11.139909 123621429216832 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 38.109753s. I0421 16:30:11.621233 123621429216832 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 16:30:12.004213 123621429216832 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389). I0421 16:30:12.004947 123621429216832 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.545172s. 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_04_int8/checkpoints/9/items I0421 16:30:12.005744 123621429216832 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_04_int8/checkpoints/9/items I0421 16:30:12.258268 123621429216832 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_04_int8/checkpoints/9 I0421 16:30:12.955707 123621429216832 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_04_int8/checkpoints/9`. I0421 16:30:12.956484 123621429216832 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 52.013331s. directory=gs://wanglance-maxtext/linen_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/linen_feat_nnx_trainstate_and_training_loop_20260421_161934_04_int8/checkpoints/9 I0421 16:30:12.956566 123621429216832 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 39.926412s. I0421 16:30:12.956769 123621320164928 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0421 16:30:12.956825 123621320164928 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0421 16:30:12.956912 123621320164928 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0421 16:30:12.956960 123621320164928 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0421 16:30:12.957575 123712546376832 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 16:30:12.957729 123712546376832 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0421 16:30:12.958653 123712546376832 metric_logger.py:196] completed step: 9, seconds: 0.120, TFLOP/s/device: 113.568, Tokens/s/device: 17118.164, total_weights: 12300, loss: 8.774, lm_loss: 8.774, perplexity: 6465.313 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops
2026-04-21 17:49:26.944921: 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 00:00:1776793766.954843 1673033 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered E0000 00:00:1776793766.957939 1673033 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered W0000 00:00:1776793766.967833 1673033 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776793766.967844 1673033 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776793766.967846 1673033 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776793766.967848 1673033 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. Unrecognized keys in `rope_scaling` for 'rope_type'='yarn': {'rope_theta'} `rope_scaling`'s factor field must be a float >= 1, got 40 `rope_scaling`'s beta_fast field must be a float, got 32 `rope_scaling`'s beta_slow field must be a float, got 1 Unrecognized keys in `rope_scaling` for 'rope_type'='yarn': {'rope_theta'} Unrecognized keys in `rope_scaling` for 'rope_type'='yarn': {'rope_theta'} Unrecognized keys in `rope_scaling` for 'rope_type'='yarn': {'rope_theta'} 2026-04-21 17:49:30.630121: E external/local_xla/xla/stream_executor/cuda/cuda_platform.cc:51] failed call to cuInit: INTERNAL: CUDA error: Failed call to cuInit: UNKNOWN ERROR (303) I0421 17:49:30.766394 130741314841728 max_utils.py:238] Skipping jax distributed system due to skip_jax_distributed_system=True flag. I0421 17:49:58.565698 130741314841728 max_utils.py:800] System Information: Jax Version: 0.8.1 I0421 17:49:58.565951 130741314841728 max_utils.py:801] System Information: Jaxlib Version: 0.8.1 I0421 17:49:58.565997 130741314841728 max_utils.py:802] System Information: Jax Backend: PJRT C API TFRT TPU v6 lite Built on Nov 12 2025 14:16:36 (1762985796) cl/831091709 I0421 17:49:58.566026 130741314841728 train_utils.py:378] WARNING: 'dataset_path' might be pointing your local file system I0421 17:49:58.566223 130741314841728 train.py:806] [DECOUPLED NO-OP] skipping cloud diagnostics wrapper. I0421 17:49:59.197535 130741314841728 maxtext_utils.py:1732] Num_devices: 8, shape (1, 1, 1, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0421 17:49:59.689176 130741314841728 checkpointing.py:688] Setting up checkpoint logger... I0421 17:49:59.689291 130741314841728 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0421 17:49:59.689333 130741314841728 pytree_checkpoint_handler.py:577] save_device_host_concurrent_bytes=None I0421 17:49:59.689510 130741314841728 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 0x76e8495a6090>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0421 17:50:02.099774 130741314841728 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0421 17:50:02.099972 130741314841728 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 0x76e6a115d760>}, handler_registry=None I0421 17:50:02.100212 130741314841728 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x76e6a115d760>` for item "items" and save args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>` to `_handler_registry`. I0421 17:50:02.100256 130741314841728 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x76e6a115d6d0>` for item "metrics" and save args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>` to `_handler_registry`. I0421 17:50:02.100286 130741314841728 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 0x76e6a115d760>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x76e6a115d760>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x76e6a115d6d0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x76e6a115d6d0>}). I0421 17:50:02.100559 130741314841728 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.28 I0421 17:50:02.100610 130741314841728 async_checkpointer.py:177] [process=0][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>.<lambda> at 0x76e6a0d13600> timeout: 600 secs and primary_host=0 for async checkpoint writes I0421 17:50:02.227275 130741314841728 checkpoint_manager.py:1788] Found 0 checkpoint steps in gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_04_int8/checkpoints I0421 17:50:02.227507 130741314841728 checkpoint_manager.py:921] [process=0][thread=MainThread] CheckpointManager created, primary_host=0, CheckpointManagerOptions=CheckpointManagerOptions(save_interval_steps=1, max_to_keep=None, keep_time_interval=None, keep_period=None, should_keep_fn=None, best_fn=None, best_mode='max', keep_checkpoints_without_metrics=True, step_prefix=None, step_format_fixed_length=None, step_name_format=None, create=True, cleanup_tmp_directories=False, save_on_steps=frozenset(), single_host_load_and_broadcast=False, todelete_subdir=None, todelete_full_path=None, enable_hns=False, enable_background_delete=False, read_only=False, enable_async_checkpointing=True, async_options=None, multiprocessing_options=MultiprocessingOptions(primary_host=0, active_processes=None, barrier_sync_key_prefix=None), should_save_fn=None, file_options=FileOptions(path_permission_mode=None), save_root_metadata=True, temporary_path_class=None, save_decision_policy=FixedIntervalPolicy(interval=10), preservation_policy=LatestN(n=None), prevent_write_metrics=False, enable_should_save_is_saving_in_progress_check=True, enable_per_process_directory_creation=False), root_directory=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_04_int8/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x76e6a115f0e0> I0421 17:50:02.227589 130741314841728 checkpointing.py:302] Checkpoint manager created! I0421 17:50:02.304984 130741314841728 dataset_info.py:707] Load dataset info from tests/assets/local_datasets/c4_en_dataset_minimal/c4/en/3.1.0 I0421 17:50:02.307910 130741314841728 reader.py:262] Creating a tf.data.Dataset reading 8 files located in folders: tests/assets/local_datasets/c4_en_dataset_minimal/c4/en/3.1.0. I0421 17:50:02.359460 130741314841728 logging_logger.py:49] Constructing tf.data.Dataset __local_c4_builder for split train, from tests/assets/local_datasets/c4_en_dataset_minimal/c4/en/3.1.0 I0421 17:50:02.382580 130741314841728 tokenizer.py:245] Tokenizer path: src/maxtext/assets/tokenizers/tokenizer.llama2 I0421 17:50:02.382646 130741314841728 tokenizer.py:187] Loading sentencepiece tokenizer: src/maxtext/assets/tokenizers/tokenizer.llama2 I0421 17:50:03.721937 130741314841728 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0421 17:50:03.722073 130741314841728 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. [DECOUPLED NO-OP] gcs_storage: using stubs. [DECOUPLED NO-OP] mldiagnostics: using stub. [DECOUPLED NO-OP] mldiagnostics: using stub. [DECOUPLED NO-OP] mldiagnostics: using stub. [DECOUPLED NO-OP] workload_monitor: using stub. [DECOUPLED NO-OP] vertex_tensorboard: using stub. fsdp: 8 I0421 17:50:07.207230 130741314841728 nnx_decoders.py:465] nnx_decoders/carry Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0421 17:50:07.207459 130741314841728 nnx_decoders.py:465] nnx_decoders/carry Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0421 17:50:07.212770 130741314841728 nnx_decoders.py:465] Unknown Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0421 17:50:07.212944 130741314841728 nnx_decoders.py:465] Unknown Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0421 17:50:07.226327 130741314841728 attentions.py:1088] attentions/inputs_q Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0421 17:50:07.226411 130741314841728 attentions.py:1088] attentions/inputs_q Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0421 17:50:07.239282 130741314841728 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0421 17:50:07.239367 130741314841728 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0421 17:50:07.298001 130741314841728 attentions.py:1154] attentions/query Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0421 17:50:07.298135 130741314841728 attentions.py:1154] attentions/query Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0421 17:50:07.310963 130741314841728 attentions.py:1155] attentions/key Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0421 17:50:07.311067 130741314841728 attentions.py:1155] attentions/key Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0421 17:50:07.324191 130741314841728 attentions.py:1156] attentions/value Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0421 17:50:07.324275 130741314841728 attentions.py:1156] attentions/value Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0421 17:50:07.346239 130741314841728 attentions.py:1198] attentions/out Logical: bfloat16[8,2048,16,128]..................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0421 17:50:07.346331 130741314841728 attentions.py:1198] attentions/out Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0421 17:50:07.474083 130741314841728 linears.py:525] linears/x Logical: bfloat16[8,2048,7168]....................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0421 17:50:07.474203 130741314841728 linears.py:525] linears/x Physical: bfloat16[8,2048,7168]....................................... ('fsdp', None, None). I0421 17:50:23.712308 130741314841728 max_utils.py:791] Total memory size: 3.7 GB, Output size: 1.5 GB, Temp size: 2.2 GB, Argument size: 1.5 GB, Host temp size: 0.0 GB. I0421 17:50:23.713311 130741314841728 max_utils.py:194] tensorboardX not available; using no-op SummaryWriter. I0421 17:50:23.715984 130741314841728 metric_logger.py:301] number parameters: 1.104 billion I0421 17:50:46.287135 130741314841728 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0421 17:50:46.438311 130741314841728 checkpointing.py:798] Waited 0.15114283561706543 seconds for step 0 to finish before starting checkpointing. I0421 17:50:46.439039 130741314841728 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0421 17:50:46.439220 130741314841728 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 0 I0421 17:50:46.439621 130741314841728 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_04_int8/checkpoints/0. I0421 17:50:46.537947 130741314841728 signaling_client.py:373] Using ThreadSafeKeyValueSignalingClient I0421 17:50:46.643429 130648830379584 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_04_int8/checkpoints/0 I0421 17:50:46.644153 130741314841728 jax_array_handlers.py:347] Scheduling D2H of 111 prioritized jax.Array. I0421 17:50:46.644323 130741314841728 replica_slices.py:410] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False I0421 17:50:47.375306 130648819893824 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_04_int8/checkpoints/0/items I0421 17:50:47.532751 130648788436544 checkpoint.py:188] Wrote Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776793847283316641, 'commit_timestamp_nsecs': None, 'custom_metadata': {}}, json={"item_handlers": null, "metrics": {}, "performance_metrics": {}, "init_timestamp_nsecs": 1776793847283316641, "commit_timestamp_nsecs": null, "custom_metadata": {}} to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_04_int8/checkpoints/0/_CHECKPOINT_METADATA I0421 17:50:47.906822 1676748 google_auth_provider.cc:149] Using credentials at ~/.config/gcloud/application_default_credentials.json I0421 17:50:47.906888 1676748 google_auth_provider.cc:156] Using OAuth2 AuthProvider I0421 17:50:48.177035 130741314841728 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 1.535983s I0421 17:50:48.186710 130741314841728 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 7.490 GiB/s (total gbytes: 12.3 GiB) (time elapsed: a second) (per-host) I0421 17:50:48.186782 130741314841728 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 1.647748s (batch_requests_ready=0.087631s, total_serialization_initiated=1.550576s, others=0.009542s) I0421 17:50:48.186868 130741314841728 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.648369s (all_items=0.000019s, per_item={'items': '0.00001931'}, temp_paths=1.648350) I0421 17:50:48.188543 130648715036224 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0421 17:50:48.188635 130741314841728 async_checkpointer.py:561] Finished blocking save. Time taken: 1.749372s. Continuing background save to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_04_int8/checkpoints/0. I0421 17:50:48.188822 130741314841728 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0421 17:50:48.189002 130647710500416 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0421 17:50:48.189119 130741314841728 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_04_int8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776793846.4390268, 'wait_for_prev_duration_secs': 5.7220458984375e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776793846.4392433, 'checkpointer_blocking_duration_secs': 1.7495040893554688, 'get_old_steps_start_time': 1776793848.1887646, 'get_old_steps_duration_secs': 2.2649765014648438e-05, 'checkpoint_manager_blocking_start_time': 1776793846.4387233, 'checkpoint_manager_blocking_duration_secs': 1.750366449356079} I0421 17:50:48.189355 130741314841728 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0421 17:50:48.189412 130741314841728 max_utils.py:750] Memstats: After params initialized: I0421 17:50:48.189469 130741314841728 max_utils.py:756] Using (GB) 1.6 / 31.25 (5.120000%) on TPU_0(process=0,(0,0,0,0)) I0421 17:50:48.189497 130741314841728 max_utils.py:756] Using (GB) 1.6 / 31.25 (5.120000%) on TPU_1(process=0,(1,0,0,0)) I0421 17:50:48.189517 130741314841728 max_utils.py:756] Using (GB) 1.6 / 31.25 (5.120000%) on TPU_2(process=0,(0,1,0,0)) I0421 17:50:48.189537 130741314841728 max_utils.py:756] Using (GB) 1.6 / 31.25 (5.120000%) on TPU_3(process=0,(1,1,0,0)) I0421 17:50:48.189556 130741314841728 max_utils.py:756] Using (GB) 1.6 / 31.25 (5.120000%) on TPU_4(process=0,(0,2,0,0)) I0421 17:50:48.189572 130741314841728 max_utils.py:756] Using (GB) 1.6 / 31.25 (5.120000%) on TPU_5(process=0,(1,2,0,0)) I0421 17:50:48.189589 130741314841728 max_utils.py:756] Using (GB) 1.6 / 31.25 (5.120000%) on TPU_6(process=0,(0,3,0,0)) I0421 17:50:48.189606 130741314841728 max_utils.py:756] Using (GB) 1.6 / 31.25 (5.120000%) on TPU_7(process=0,(1,3,0,0)) I0421 17:50:48.609028 130741314841728 metric_logger.py:196] completed step: 0, seconds: 22.569, TFLOP/s/device: 0.602, Tokens/s/device: 90.745, total_weights: 13328, loss: 10.880, lm_loss: 10.880, perplexity: 53080.566 I0421 17:50:48.610013 130741314841728 metric_logger.py:281] To see full metrics 'tensorboard --logdir=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_04_int8/tensorboard/' I0421 17:50:48.719845 130741314841728 metric_logger.py:196] completed step: 1, seconds: 2.314, TFLOP/s/device: 5.872, Tokens/s/device: 885.083, total_weights: 12332, loss: 10.851, lm_loss: 10.851, perplexity: 51573.340 I0421 17:50:48.840320 130741314841728 metric_logger.py:196] completed step: 2, seconds: 0.036, TFLOP/s/device: 374.157, Tokens/s/device: 56396.982, total_weights: 15161, loss: 9.862, lm_loss: 9.862, perplexity: 19196.018 I0421 17:50:48.953084 130648746493504 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 111 array_metadata.ArrayMetadata to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_04_int8/checkpoints/0/items/array_metadatas/process_0 I0421 17:50:48.961234 130741314841728 metric_logger.py:196] completed step: 3, seconds: 0.095, TFLOP/s/device: 142.456, Tokens/s/device: 21472.457, total_weights: 13327, loss: 9.404, lm_loss: 9.404, perplexity: 12137.980 I0421 17:51:07.703425 130741314841728 metric_logger.py:196] completed step: 4, seconds: 0.119, TFLOP/s/device: 113.745, Tokens/s/device: 17144.818, total_weights: 11939, loss: 9.133, lm_loss: 9.133, perplexity: 9252.317 I0421 17:51:07.720561 130741314841728 metric_logger.py:196] completed step: 5, seconds: 0.121, TFLOP/s/device: 112.352, Tokens/s/device: 16934.857, total_weights: 15502, loss: 9.029, lm_loss: 9.029, perplexity: 8338.597 I0421 17:51:07.835509 130741314841728 metric_logger.py:196] completed step: 6, seconds: 18.744, TFLOP/s/device: 0.725, Tokens/s/device: 109.259, total_weights: 13864, loss: 8.894, lm_loss: 8.894, perplexity: 7286.662 I0421 17:51:07.956622 130741314841728 metric_logger.py:196] completed step: 7, seconds: 0.010, TFLOP/s/device: 1302.572, Tokens/s/device: 196337.839, total_weights: 12988, loss: 8.806, lm_loss: 8.806, perplexity: 6671.804 I0421 17:51:08.077347 130741314841728 metric_logger.py:196] completed step: 8, seconds: 0.117, TFLOP/s/device: 116.541, Tokens/s/device: 17566.281, total_weights: 13820, loss: 8.803, lm_loss: 8.803, perplexity: 6653.874 I0421 17:51:08.199664 130741314841728 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0421 17:51:08.201276 130741314841728 checkpointing.py:798] Waited 0.0016283988952636719 seconds for step 9 to finish before starting checkpointing. I0421 17:51:08.201576 130741314841728 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0421 17:51:32.449166 130648736007744 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 44.261587s (commit=43.818770s, array_metadata_write=0.442817s) I0421 17:51:32.450484 130648715036224 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 275.243 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 45 seconds) (per-host) I0421 17:51:32.450551 130648715036224 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 44.261868s. I0421 17:51:32.687940 130648715036224 checkpoint.py:228] Read Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776793847283316641, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} from gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_04_int8/checkpoints/0/_CHECKPOINT_METADATA I0421 17:51:32.872984 130648715036224 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 17:51:33.065577 130648788436544 checkpoint.py:247] Updated Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776793847283316641, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_04_int8/checkpoints/0/_CHECKPOINT_METADATA I0421 17:51:33.285920 130648715036224 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389). I0421 17:51:33.286960 130648715036224 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.554137s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_04_int8/checkpoints/0/items I0421 17:51:33.287760 130648715036224 atomicity.py:608] Finalizing gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_04_int8/checkpoints/0/items I0421 17:51:33.526373 130648715036224 atomicity.py:608] Finalizing gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_04_int8/checkpoints/0 I0421 17:51:34.240932 130648715036224 atomicity.py:794] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_04_int8/checkpoints/0`. I0421 17:51:34.241677 130648715036224 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 47.802422s. directory=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_04_int8/checkpoints/0 I0421 17:51:34.241755 130648715036224 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 46.053077s. I0421 17:51:34.241945 130647710500416 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0421 17:51:34.242083 130647710500416 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0421 17:51:34.242138 130647710500416 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0421 17:51:34.242185 130647710500416 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0421 17:51:34.242280 130741314841728 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 17:51:34.242362 130741314841728 checkpoint_manager.py:1441] Waiting for previous save to complete took 26.040798 seconds. If this number is high, consider checkpointing less frequently. I0421 17:51:34.243174 130741314841728 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 9 I0421 17:51:34.243426 130741314841728 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_04_int8/checkpoints/9. I0421 17:51:34.403059 130647710500416 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_04_int8/checkpoints/9 I0421 17:51:34.443678 130741314841728 jax_array_handlers.py:347] Scheduling D2H of 111 prioritized jax.Array. I0421 17:51:34.443788 130741314841728 replica_slices.py:410] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False I0421 17:51:35.143941 130648704550464 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_04_int8/checkpoints/9/items I0421 17:51:38.640572 130741314841728 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 4.199262s I0421 17:51:38.641192 130741314841728 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.855 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 4 seconds) (per-host) I0421 17:51:38.641246 130741314841728 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 4.322651s (batch_requests_ready=0.109107s, total_serialization_initiated=4.213062s, others=0.000482s) I0421 17:51:38.641322 130741314841728 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 4.323224s (all_items=0.000015s, per_item={'items': '0.00001478'}, temp_paths=4.323209) I0421 17:51:38.651615 130647710500416 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0421 17:51:38.651748 130741314841728 async_checkpointer.py:561] Finished blocking save. Time taken: 4.408528s. Continuing background save to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_04_int8/checkpoints/9. I0421 17:51:38.651957 130741314841728 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0421 17:51:38.652145 130648715036224 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0421 17:51:38.652227 130741314841728 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_04_int8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776793868.2015405, 'wait_for_prev_duration_secs': 26.04079818725586, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776793894.2431989, 'checkpointer_blocking_duration_secs': 4.4086713790893555, 'get_old_steps_start_time': 1776793898.6518862, 'get_old_steps_duration_secs': 3.0517578125e-05, 'checkpoint_manager_blocking_start_time': 1776793868.2014983, 'checkpoint_manager_blocking_duration_secs': 30.450703620910645} I0421 17:51:38.652361 130741314841728 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0421 17:51:38.652396 130741314841728 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0421 17:51:39.395087 130648767465024 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 111 array_metadata.ArrayMetadata to gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_04_int8/checkpoints/9/items/array_metadatas/process_0 I0421 17:52:14.863852 130647825843776 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 36.213001s (commit=35.775627s, array_metadata_write=0.437374s) I0421 17:52:14.865323 130647710500416 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 311.661 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 40 seconds) (per-host) I0421 17:52:14.865457 130647710500416 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 36.213740s. I0421 17:52:15.278431 130647710500416 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 17:52:15.673510 130647710500416 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389). I0421 17:52:15.674662 130647710500416 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.548924s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_04_int8/checkpoints/9/items I0421 17:52:15.675473 130647710500416 atomicity.py:608] Finalizing gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_04_int8/checkpoints/9/items I0421 17:52:15.903971 130647710500416 atomicity.py:608] Finalizing gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_04_int8/checkpoints/9 I0421 17:52:16.575719 130647710500416 atomicity.py:794] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_04_int8/checkpoints/9`. I0421 17:52:16.576453 130647710500416 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 42.333240s. directory=gs://wanglance-maxtext/nnx_ckpt_feat_nnx_trainstate_and_training_loop_20260421_161934/nnx_feat_nnx_trainstate_and_training_loop_20260421_161934_04_int8/checkpoints/9 I0421 17:52:16.576534 130647710500416 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 37.924822s. I0421 17:52:16.576656 130648715036224 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0421 17:52:16.576709 130648715036224 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0421 17:52:16.576772 130648715036224 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0421 17:52:16.576819 130648715036224 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0421 17:52:16.576996 130741314841728 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 17:52:16.577246 130741314841728 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0421 17:52:16.578843 130741314841728 metric_logger.py:196] completed step: 9, seconds: 0.121, TFLOP/s/device: 112.017, Tokens/s/device: 16884.455, total_weights: 12300, loss: 8.755, lm_loss: 8.755, perplexity: 6343.337 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops