2026-04-23 03:00:58.060663: 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 00:00:1776913258.074238 2353184 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered E0000 00:00:1776913258.078232 2353184 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered W0000 00:00:1776913258.090633 2353184 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776913258.090647 2353184 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776913258.090649 2353184 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776913258.090651 2353184 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'} 2026-04-23 03:01:01.750205: 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) I0423 03:01:01.885316 130111404267328 max_utils.py:238] Skipping jax distributed system due to skip_jax_distributed_system=True flag. ~/maxtext/maxtext_venv/lib/python3.12/site-packages/jax/_src/xla_bridge.py:204: UserWarning: TPU backend initialization is taking more than 60.0 seconds. Did you run your code on all TPU hosts? See https://docs.jax.dev/en/latest/multi_process.html for more information. warnings.warn( I0423 03:02:07.398036 130111404267328 max_utils.py:800] System Information: Jax Version: 0.8.1 I0423 03:02:07.398289 130111404267328 max_utils.py:801] System Information: Jaxlib Version: 0.8.1 I0423 03:02:07.398339 130111404267328 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 I0423 03:02:07.398369 130111404267328 train_utils.py:348] WARNING: 'dataset_path' might be pointing your local file system I0423 03:02:07.398537 130111404267328 train.py:672] [DECOUPLED NO-OP] skipping cloud diagnostics wrapper. I0423 03:02:08.058944 130111404267328 maxtext_utils.py:1604] Num_devices: 8, shape (1, 1, 1, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0423 03:02:08.059216 130111404267328 checkpointing.py:677] Setting up checkpoint logger... I0423 03:02:08.059262 130111404267328 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True I0423 03:02:08.059298 130111404267328 pytree_checkpoint_handler.py:577] save_device_host_concurrent_bytes=None I0423 03:02:08.059709 130111404267328 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 0x7655a27c0dd0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0423 03:02:10.480212 130111404267328 checkpointing.py:265] Enabling policy for fixed interval checkpointing. I0423 03:02:10.480566 130111404267328 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 0x76544514af00>}, handler_registry=None I0423 03:02:10.480794 130111404267328 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x76544514af00>` 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`. I0423 03:02:10.480835 130111404267328 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7653d0f3d9a0>` 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`. I0423 03:02:10.480865 130111404267328 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 0x76544514af00>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x76544514af00>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7653d0f3d9a0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7653d0f3d9a0>}). I0423 03:02:10.481152 130111404267328 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.28 I0423 03:02:10.481200 130111404267328 async_checkpointer.py:177] [process=0][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>.<lambda> at 0x7653d0f5c540> timeout: 600 secs and primary_host=0 for async checkpoint writes I0423 03:02:10.606956 130111404267328 checkpoint_manager.py:1788] Found 0 checkpoint steps in gs://wanglance-maxtext/linen_ckpt_fix_gate_fp8_nan_sanitization_20260423_024158/linen_fix_gate_fp8_nan_sanitization_20260423_024158_07_eval/checkpoints I0423 03:02:10.607196 130111404267328 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_fix_gate_fp8_nan_sanitization_20260423_024158/linen_fix_gate_fp8_nan_sanitization_20260423_024158_07_eval/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7653d0f3e210> I0423 03:02:10.607469 130111404267328 checkpointing.py:301] Checkpoint manager created! I0423 03:02:10.684584 130111404267328 dataset_info.py:707] Load dataset info from tests/assets/local_datasets/c4_en_dataset_minimal/c4/en/3.1.0 I0423 03:02:10.687353 130111404267328 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. I0423 03:02:10.746462 130111404267328 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 I0423 03:02:10.769121 130111404267328 tokenizer.py:245] Tokenizer path: src/maxtext/assets/tokenizers/tokenizer.llama2 I0423 03:02:10.769183 130111404267328 tokenizer.py:187] Loading sentencepiece tokenizer: src/maxtext/assets/tokenizers/tokenizer.llama2 I0423 03:02:11.311237 130111404267328 dataset_info.py:707] Load dataset info from tests/assets/local_datasets/c4_en_dataset_minimal/c4/en/3.1.0 I0423 03:02:11.312768 130111404267328 reader.py:262] Creating a tf.data.Dataset reading 2 files located in folders: tests/assets/local_datasets/c4_en_dataset_minimal/c4/en/3.1.0. I0423 03:02:11.327715 130111404267328 logging_logger.py:49] Constructing tf.data.Dataset __local_c4_builder for split validation, from tests/assets/local_datasets/c4_en_dataset_minimal/c4/en/3.1.0 I0423 03:02:11.330220 130111404267328 tokenizer.py:245] Tokenizer path: src/maxtext/assets/tokenizers/tokenizer.llama2 I0423 03:02:11.330269 130111404267328 tokenizer.py:187] Loading sentencepiece tokenizer: src/maxtext/assets/tokenizers/tokenizer.llama2 I0423 03:02:11.639095 130111404267328 nnx_wrappers.py:437] Unknown Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0423 03:02:11.639186 130111404267328 nnx_wrappers.py:437] Unknown Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0423 03:02:11.938846 130111404267328 attentions.py:1088] attentions/inputs_q Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 03:02:11.938924 130111404267328 attentions.py:1088] attentions/inputs_q Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0423 03:02:11.951611 130111404267328 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 03:02:11.951658 130111404267328 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0423 03:02:11.970729 130111404267328 attentions.py:1154] attentions/query Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 03:02:11.970785 130111404267328 attentions.py:1154] attentions/query Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0423 03:02:11.983589 130111404267328 attentions.py:1155] attentions/key Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 03:02:11.983643 130111404267328 attentions.py:1155] attentions/key Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0423 03:02:11.996317 130111404267328 attentions.py:1156] attentions/value Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 03:02:11.996364 130111404267328 attentions.py:1156] attentions/value Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0423 03:02:12.016350 130111404267328 attentions.py:1198] attentions/out Logical: bfloat16[8,2048,16,128]..................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0423 03:02:12.016408 130111404267328 attentions.py:1198] attentions/out Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0423 03:02:12.032288 130111404267328 linears.py:525] linears/x Logical: bfloat16[8,2048,7168]....................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0423 03:02:12.032343 130111404267328 linears.py:525] linears/x Physical: bfloat16[8,2048,7168]....................................... ('fsdp', None, None). I0423 03:02:12.186434 130111404267328 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint I0423 03:02:12.186529 130111404267328 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 I0423 03:02:12.761853 130111404267328 maxtext_utils.py:1707] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: PartitionSpec('norm',) Physical: (None,) I0423 03:02:12.761970 130111404267328 maxtext_utils.py:1707] params/params/decoder/layers/mlp/wi_0/kernel Shape: float32[2048,16,7168] Logical: PartitionSpec('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0423 03:02:12.762014 130111404267328 maxtext_utils.py:1707] params/params/decoder/layers/mlp/wi_1/kernel Shape: float32[2048,16,7168] Logical: PartitionSpec('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0423 03:02:12.762077 130111404267328 maxtext_utils.py:1707] params/params/decoder/layers/mlp/wo/kernel Shape: float32[7168,16,2048] Logical: PartitionSpec('mlp', 'layers', 'embed') Physical: (None, None, 'fsdp') I0423 03:02:12.762124 130111404267328 maxtext_utils.py:1707] params/params/decoder/layers/post_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: PartitionSpec('norm', 'layers') Physical: (None, None) I0423 03:02:12.762154 130111404267328 maxtext_utils.py:1707] params/params/decoder/layers/pre_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: PartitionSpec('norm', 'layers') Physical: (None, None) I0423 03:02:12.762193 130111404267328 maxtext_utils.py:1707] 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) I0423 03:02:12.762233 130111404267328 maxtext_utils.py:1707] 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') I0423 03:02:12.762262 130111404267328 maxtext_utils.py:1707] 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) I0423 03:02:12.762288 130111404267328 maxtext_utils.py:1707] 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) I0423 03:02:12.762323 130111404267328 maxtext_utils.py:1707] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: PartitionSpec('embed_vocab', 'vocab') Physical: ('fsdp', None) I0423 03:02:12.762356 130111404267328 maxtext_utils.py:1707] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: PartitionSpec('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0423 03:02:13.441434 130111404267328 train.py:155] train/xent Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length'). I0423 03:02:13.441516 130111404267328 train.py:155] train/xent Physical: float32[8,2048]............................................. ('fsdp', None). I0423 03:02:13.453581 130111404267328 train.py:162] train/z_loss Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length'). I0423 03:02:13.453636 130111404267328 train.py:162] train/z_loss Physical: float32[8,2048]............................................. ('fsdp', None). I0423 03:02:14.214479 130111404267328 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. I0423 03:02:14.215000 130111404267328 max_utils.py:194] tensorboardX not available; using no-op SummaryWriter. I0423 03:02:14.215166 130111404267328 metric_logger.py:301] number parameters: 1.104 billion I0423 03:02:18.200451 130111404267328 checkpointing.py:772] Waiting for step 0 to finish before checkpoint... I0423 03:02:18.321992 130111404267328 checkpointing.py:776] Waited 0.12152314186096191 seconds for step 0 to finish before starting checkpointing. I0423 03:02:18.322613 130111404267328 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 03:02:18.322763 130111404267328 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 0 I0423 03:02:18.323142 130111404267328 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/linen_ckpt_fix_gate_fp8_nan_sanitization_20260423_024158/linen_fix_gate_fp8_nan_sanitization_20260423_024158_07_eval/checkpoints/0. I0423 03:02:18.420466 130111404267328 signaling_client.py:373] Using ThreadSafeKeyValueSignalingClient I0423 03:02:18.504361 129980941993536 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_fix_gate_fp8_nan_sanitization_20260423_024158/linen_fix_gate_fp8_nan_sanitization_20260423_024158_07_eval/checkpoints/0 I0423 03:02:18.517459 130111404267328 jax_array_handlers.py:347] Scheduling D2H of 39 prioritized jax.Array. I0423 03:02:18.517547 130111404267328 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 I0423 03:02:19.258768 129980931507776 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_fix_gate_fp8_nan_sanitization_20260423_024158/linen_fix_gate_fp8_nan_sanitization_20260423_024158_07_eval/checkpoints/0/items I0423 03:02:19.419449 129980900050496 checkpoint.py:188] Wrote Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776913339155659179, 'commit_timestamp_nsecs': None, 'custom_metadata': {}}, json={"item_handlers": null, "metrics": {}, "performance_metrics": {}, "init_timestamp_nsecs": 1776913339155659179, "commit_timestamp_nsecs": null, "custom_metadata": {}} to gs://wanglance-maxtext/linen_ckpt_fix_gate_fp8_nan_sanitization_20260423_024158/linen_fix_gate_fp8_nan_sanitization_20260423_024158_07_eval/checkpoints/0/_CHECKPOINT_METADATA I0423 03:02:19.783698 2355778 google_auth_provider.cc:149] Using credentials at ~/.config/gcloud/application_default_credentials.json I0423 03:02:19.783760 2355778 google_auth_provider.cc:156] Using OAuth2 AuthProvider I0423 03:02:19.893012 130111404267328 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 1.375934s I0423 03:02:19.897825 130111404267328 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 8.360 GiB/s (total gbytes: 12.3 GiB) (time elapsed: a second) (per-host) I0423 03:02:19.897890 130111404267328 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 1.476225s (batch_requests_ready=0.092031s, total_serialization_initiated=1.379495s, others=0.004699s) I0423 03:02:19.897969 130111404267328 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.477062s (all_items=0.000020s, per_item={'items': '0.00002027'}, temp_paths=1.477042) I0423 03:02:19.899172 129981090891328 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0423 03:02:19.899256 130111404267328 async_checkpointer.py:561] Finished blocking save. Time taken: 1.576453s. Continuing background save to gs://wanglance-maxtext/linen_ckpt_fix_gate_fp8_nan_sanitization_20260423_024158/linen_fix_gate_fp8_nan_sanitization_20260423_024158_07_eval/checkpoints/0. I0423 03:02:19.899469 130111404267328 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0423 03:02:19.899682 129980291876416 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0423 03:02:19.899785 130111404267328 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/linen_ckpt_fix_gate_fp8_nan_sanitization_20260423_024158/linen_fix_gate_fp8_nan_sanitization_20260423_024158_07_eval/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776913338.3226001, 'wait_for_prev_duration_secs': 4.315376281738281e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776913338.3227851, 'checkpointer_blocking_duration_secs': 1.5765843391418457, 'get_old_steps_start_time': 1776913339.8993974, 'get_old_steps_duration_secs': 3.0040740966796875e-05, 'checkpoint_manager_blocking_start_time': 1776913338.3225195, 'checkpoint_manager_blocking_duration_secs': 1.5772395133972168} I0423 03:02:19.899922 130111404267328 checkpointing.py:408] Started an asynchronous checkpoint save for step 0 I0423 03:02:19.899967 130111404267328 max_utils.py:750] Memstats: After params initialized: I0423 03:02:19.900018 130111404267328 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_0(process=0,(0,0,0,0)) I0423 03:02:19.900059 130111404267328 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_1(process=0,(1,0,0,0)) I0423 03:02:19.900080 130111404267328 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_2(process=0,(0,1,0,0)) I0423 03:02:19.900101 130111404267328 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_3(process=0,(1,1,0,0)) I0423 03:02:19.900119 130111404267328 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_4(process=0,(0,2,0,0)) I0423 03:02:19.900137 130111404267328 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_5(process=0,(1,2,0,0)) I0423 03:02:19.900155 130111404267328 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_6(process=0,(0,3,0,0)) I0423 03:02:19.900171 130111404267328 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_7(process=0,(1,3,0,0)) I0423 03:02:20.268949 130111404267328 metric_logger.py:196] completed step: 0, seconds: 3.985, TFLOP/s/device: 3.410, Tokens/s/device: 513.957, total_weights: 13328, loss: 10.828, lm_loss: 10.828, perplexity: 50404.086 I0423 03:02:20.269859 130111404267328 metric_logger.py:281] To see full metrics 'tensorboard --logdir=gs://wanglance-maxtext/linen_ckpt_fix_gate_fp8_nan_sanitization_20260423_024158/linen_fix_gate_fp8_nan_sanitization_20260423_024158_07_eval/tensorboard/' I0423 03:02:20.385098 130111404267328 metric_logger.py:196] completed step: 1, seconds: 2.066, TFLOP/s/device: 6.576, Tokens/s/device: 991.178, total_weights: 12332, loss: 10.828, lm_loss: 10.828, perplexity: 50391.758 I0423 03:02:20.502637 130111404267328 metric_logger.py:196] completed step: 2, seconds: 0.010, TFLOP/s/device: 1361.572, Tokens/s/device: 205230.985, total_weights: 15161, loss: 9.823, lm_loss: 9.823, perplexity: 18444.867 I0423 03:02:20.773231 129980436579904 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://wanglance-maxtext/linen_ckpt_fix_gate_fp8_nan_sanitization_20260423_024158/linen_fix_gate_fp8_nan_sanitization_20260423_024158_07_eval/checkpoints/0/items/array_metadatas/process_0 I0423 03:02:23.901276 130111404267328 train.py:589] Completed eval step 0 I0423 03:02:23.943542 130111404267328 train.py:589] Completed eval step 1 I0423 03:02:23.948479 130111404267328 metric_logger.py:216] eval metrics after step: 4, loss=8.979, perplexity=7936.996, total_weights=26703.0 I0423 03:02:23.949029 130111404267328 metric_logger.py:196] completed step: 3, seconds: 0.117, TFLOP/s/device: 115.920, Tokens/s/device: 17472.763, total_weights: 13327, loss: 9.405, lm_loss: 9.405, perplexity: 12149.331 I0423 03:02:43.400371 130111404267328 metric_logger.py:196] completed step: 4, seconds: 0.118, TFLOP/s/device: 114.672, Tokens/s/device: 17284.597, total_weights: 11939, loss: 9.045, lm_loss: 9.045, perplexity: 8471.842 I0423 03:02:43.418684 130111404267328 metric_logger.py:196] completed step: 5, seconds: 3.446, TFLOP/s/device: 3.943, Tokens/s/device: 594.304, total_weights: 15502, loss: 8.953, lm_loss: 8.953, perplexity: 7728.546 I0423 03:02:43.534975 130111404267328 metric_logger.py:196] completed step: 6, seconds: 19.458, TFLOP/s/device: 0.698, Tokens/s/device: 105.254, total_weights: 13864, loss: 8.775, lm_loss: 8.775, perplexity: 6468.536 I0423 03:02:43.652716 130111404267328 metric_logger.py:196] completed step: 7, seconds: 0.010, TFLOP/s/device: 1424.825, Tokens/s/device: 214765.101, total_weights: 12988, loss: 8.688, lm_loss: 8.688, perplexity: 5928.887 I0423 03:02:44.361766 130111404267328 train.py:589] Completed eval step 0 I0423 03:02:44.401183 130111404267328 train.py:589] Completed eval step 1 I0423 03:02:44.404327 130111404267328 metric_logger.py:216] eval metrics after step: 9, loss=8.653, perplexity=5725.923, total_weights=26703.0 I0423 03:02:44.404771 130111404267328 metric_logger.py:196] completed step: 8, seconds: 0.117, TFLOP/s/device: 116.345, Tokens/s/device: 17536.799, total_weights: 13820, loss: 8.740, lm_loss: 8.740, perplexity: 6250.123 I0423 03:02:44.407283 130111404267328 checkpointing.py:772] Waiting for step 9 to finish before checkpoint... I0423 03:02:44.407888 130111404267328 checkpointing.py:776] Waited 0.000606536865234375 seconds for step 9 to finish before starting checkpointing. I0423 03:02:44.408200 130111404267328 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 03:03:00.571747 129980426094144 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 40.673132s (commit=40.169070s, array_metadata_write=0.504062s) I0423 03:03:00.572725 129981090891328 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 299.798 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 42 seconds) (per-host) I0423 03:03:00.572788 129981090891328 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 40.673485s. I0423 03:03:00.853941 129981090891328 checkpoint.py:228] Read Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776913339155659179, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} from gs://wanglance-maxtext/linen_ckpt_fix_gate_fp8_nan_sanitization_20260423_024158/linen_fix_gate_fp8_nan_sanitization_20260423_024158_07_eval/checkpoints/0/_CHECKPOINT_METADATA I0423 03:03:01.067203 129981090891328 array_metadata_store.py:367] [process=0][thread=async_save] Skipped cross-host ArrayMetadata validation because only one process is found: process_index=0. I0423 03:03:01.305716 129980900050496 checkpoint.py:247] Updated Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776913339155659179, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} to gs://wanglance-maxtext/linen_ckpt_fix_gate_fp8_nan_sanitization_20260423_024158/linen_fix_gate_fp8_nan_sanitization_20260423_024158_07_eval/checkpoints/0/_CHECKPOINT_METADATA I0423 03:03:01.490377 129981090891328 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389). I0423 03:03:01.490547 129981090891328 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.586846s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/linen_ckpt_fix_gate_fp8_nan_sanitization_20260423_024158/linen_fix_gate_fp8_nan_sanitization_20260423_024158_07_eval/checkpoints/0/items I0423 03:03:01.491387 129981090891328 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_fix_gate_fp8_nan_sanitization_20260423_024158/linen_fix_gate_fp8_nan_sanitization_20260423_024158_07_eval/checkpoints/0/items I0423 03:03:01.731660 129981090891328 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_fix_gate_fp8_nan_sanitization_20260423_024158/linen_fix_gate_fp8_nan_sanitization_20260423_024158_07_eval/checkpoints/0 I0423 03:03:02.515763 129981090891328 atomicity.py:794] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://wanglance-maxtext/linen_ckpt_fix_gate_fp8_nan_sanitization_20260423_024158/linen_fix_gate_fp8_nan_sanitization_20260423_024158_07_eval/checkpoints/0`. I0423 03:03:02.516397 129981090891328 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 44.193597s. directory=gs://wanglance-maxtext/linen_ckpt_fix_gate_fp8_nan_sanitization_20260423_024158/linen_fix_gate_fp8_nan_sanitization_20260423_024158_07_eval/checkpoints/0 I0423 03:03:02.516483 129981090891328 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 42.617184s. I0423 03:03:02.516643 129980291876416 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 03:03:02.516752 129980291876416 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0423 03:03:02.516823 129980291876416 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0423 03:03:02.516883 129980291876416 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0423 03:03:02.517005 130111404267328 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. W0423 03:03:02.517134 130111404267328 checkpoint_manager.py:1441] Waiting for previous save to complete took 18.108960 seconds. If this number is high, consider checkpointing less frequently. I0423 03:03:02.518811 130111404267328 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 9 I0423 03:03:02.519143 130111404267328 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/linen_ckpt_fix_gate_fp8_nan_sanitization_20260423_024158/linen_fix_gate_fp8_nan_sanitization_20260423_024158_07_eval/checkpoints/9. I0423 03:03:02.702732 129981090891328 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_fix_gate_fp8_nan_sanitization_20260423_024158/linen_fix_gate_fp8_nan_sanitization_20260423_024158_07_eval/checkpoints/9 I0423 03:03:02.717307 130111404267328 jax_array_handlers.py:347] Scheduling D2H of 39 prioritized jax.Array. I0423 03:03:02.717405 130111404267328 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 I0423 03:03:03.473541 129980436579904 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_fix_gate_fp8_nan_sanitization_20260423_024158/linen_fix_gate_fp8_nan_sanitization_20260423_024158_07_eval/checkpoints/9/items I0423 03:03:05.635302 130111404267328 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 2.918426s I0423 03:03:05.635825 130111404267328 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 4.080 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 3 seconds) (per-host) I0423 03:03:05.635885 130111404267328 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 3.024715s (batch_requests_ready=0.102739s, total_serialization_initiated=2.921556s, others=0.000421s) I0423 03:03:05.635957 130111404267328 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 3.025247s (all_items=0.000026s, per_item={'items': '0.00002599'}, temp_paths=3.025221) I0423 03:03:05.641724 129980291876416 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0423 03:03:05.641828 130111404267328 async_checkpointer.py:561] Finished blocking save. Time taken: 3.122959s. Continuing background save to gs://wanglance-maxtext/linen_ckpt_fix_gate_fp8_nan_sanitization_20260423_024158/linen_fix_gate_fp8_nan_sanitization_20260423_024158_07_eval/checkpoints/9. I0423 03:03:05.642080 130111404267328 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0423 03:03:05.642352 129963984422464 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0423 03:03:05.642469 130111404267328 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/linen_ckpt_fix_gate_fp8_nan_sanitization_20260423_024158/linen_fix_gate_fp8_nan_sanitization_20260423_024158_07_eval/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776913364.408148, 'wait_for_prev_duration_secs': 18.108959913253784, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776913382.51884, 'checkpointer_blocking_duration_secs': 3.1231253147125244, 'get_old_steps_start_time': 1776913385.6419804, 'get_old_steps_duration_secs': 4.315376281738281e-05, 'checkpoint_manager_blocking_start_time': 1776913364.408082, 'checkpoint_manager_blocking_duration_secs': 21.234359979629517} I0423 03:03:05.642599 130111404267328 checkpointing.py:408] Started an asynchronous checkpoint save for step 9 I0423 03:03:05.642635 130111404267328 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 03:03:06.409457 129980807775808 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://wanglance-maxtext/linen_ckpt_fix_gate_fp8_nan_sanitization_20260423_024158/linen_fix_gate_fp8_nan_sanitization_20260423_024158_07_eval/checkpoints/9/items/array_metadatas/process_0 I0423 03:03:47.107976 129981090891328 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 41.467252s (commit=40.905947s, array_metadata_write=0.561305s) I0423 03:03:47.109009 129980291876416 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 283.987 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 44 seconds) (per-host) I0423 03:03:47.109125 129980291876416 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.467238s. I0423 03:03:47.637553 129980291876416 array_metadata_store.py:367] [process=0][thread=async_save] Skipped cross-host ArrayMetadata validation because only one process is found: process_index=0. I0423 03:03:48.056031 129980291876416 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389). I0423 03:03:48.056274 129980291876416 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.616476s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/linen_ckpt_fix_gate_fp8_nan_sanitization_20260423_024158/linen_fix_gate_fp8_nan_sanitization_20260423_024158_07_eval/checkpoints/9/items I0423 03:03:48.057037 129980291876416 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_fix_gate_fp8_nan_sanitization_20260423_024158/linen_fix_gate_fp8_nan_sanitization_20260423_024158_07_eval/checkpoints/9/items I0423 03:03:48.317542 129980291876416 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_fix_gate_fp8_nan_sanitization_20260423_024158/linen_fix_gate_fp8_nan_sanitization_20260423_024158_07_eval/checkpoints/9 I0423 03:03:49.051246 129980291876416 atomicity.py:794] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://wanglance-maxtext/linen_ckpt_fix_gate_fp8_nan_sanitization_20260423_024158/linen_fix_gate_fp8_nan_sanitization_20260423_024158_07_eval/checkpoints/9`. I0423 03:03:49.051870 129980291876416 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 46.533015s. directory=gs://wanglance-maxtext/linen_ckpt_fix_gate_fp8_nan_sanitization_20260423_024158/linen_fix_gate_fp8_nan_sanitization_20260423_024158_07_eval/checkpoints/9 I0423 03:03:49.051948 129980291876416 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 43.410065s. I0423 03:03:49.052143 129963984422464 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 03:03:49.052242 129963984422464 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0423 03:03:49.052294 129963984422464 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0423 03:03:49.052333 129963984422464 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0423 03:03:49.052474 130111404267328 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. I0423 03:03:49.052609 130111404267328 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 03:03:49.053428 130111404267328 metric_logger.py:196] completed step: 9, seconds: 0.117, TFLOP/s/device: 116.005, Tokens/s/device: 17485.592, 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