main (0ba93e21a) vs feat/nnx-post-train-fixes (d8cde296b)| Metric | main 0ba93e21a | feat/nnx-post-train-fixes d8cde296b | Diff (feat/nnx-post-train-fixes − main) |
|---|---|---|---|
| Parameters | 1.104 billion | 1.104 billion | — |
| Final loss | 1.4490 | 1.4490 | 0 |
| TFLOP/s | 114.645 | 114.879 | +0.234 |
| Tok/s | 17280.5 | 17315.9 | +35.358 |
| Avg s/step | 5.227 | 7.131 | +1.904 |
| Memory % | 5.09 | 5.09 | 0 |
| JAX | 0.9.2 | 0.9.2 | — |
Diff = branch value − main value. Green = branch improved. Red = branch regressed.
2026-04-16 13:33:34.377895: E external/local_xla/xla/stream_executor/cuda/cuda_platform.cc:51] failed call to cuInit: INTERNAL: CUDA error: Failed call to cuInit: UNKNOWN ERROR (303) I0416 13:33:34.497691 124950050561152 max_utils.py:238] Skipping jax distributed system due to skip_jax_distributed_system=True flag. I0416 13:34:16.257356 124950050561152 max_utils.py:800] System Information: Jax Version: 0.9.2 I0416 13:34:16.257464 124950050561152 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0416 13:34:16.257499 124950050561152 max_utils.py:802] System Information: Jax Backend: PJRT C API TFRT TPU v6 lite Built on Apr 6 2026 20:48:10 (1775533690) cl/895581894 I0416 13:34:16.257525 124950050561152 train_utils.py:334] WARNING: 'dataset_path' might be pointing your local file system I0416 13:34:16.257546 124950050561152 train_utils.py:347] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0416 13:34:16.257643 124950050561152 train.py:683] [DECOUPLED NO-OP] skipping cloud diagnostics wrapper. W0416 13:34:16.350984 3876818 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0416 13:34:16.755979 124950050561152 maxtext_utils.py:1517] Num_devices: 8, shape (1, 1, 1, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0416 13:34:16.756312 124950050561152 checkpointing.py:677] Setting up checkpoint logger... I0416 13:34:16.756361 124950050561152 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True I0416 13:34:16.756400 124950050561152 pytree_checkpoint_handler.py:577] save_device_host_concurrent_bytes=None I0416 13:34:16.757086 124950050561152 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 0x71a39d1dac90>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0416 13:34:18.398553 124950050561152 checkpointing.py:265] Enabling policy for fixed interval checkpointing. I0416 13:34:18.398735 124950050561152 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 0x719d1f13da30>}, handler_registry=None I0416 13:34:18.398993 124950050561152 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x719d1f13da30>` for item "items" and save args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>` to `_handler_registry`. I0416 13:34:18.399034 124950050561152 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x719d1f13d880>` for item "metrics" and save args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>` to `_handler_registry`. I0416 13:34:18.399080 124950050561152 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 0x719d1f13da30>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x719d1f13da30>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x719d1f13d880>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x719d1f13d880>}). I0416 13:34:18.399368 124950050561152 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.28 I0416 13:34:18.399417 124950050561152 async_checkpointer.py:177] [process=0][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>.<lambda> at 0x719d1f131300> timeout: 600 secs and primary_host=0 for async checkpoint writes I0416 13:34:18.814233 124852537132608 checkpoint.py:228] Read Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776346268538503045, 'commit_timestamp_nsecs': 1776346299596787446, 'custom_metadata': {}} from gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints/0/_CHECKPOINT_METADATA I0416 13:34:18.895703 124852516161088 checkpoint_manager.py:1847] Missing metrics for step 9 I0416 13:34:18.917963 124950050561152 checkpoint_manager.py:1788] Found 3 checkpoint steps in gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints I0416 13:34:18.918425 124950050561152 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=5), preservation_policy=LatestN(n=None), prevent_write_metrics=False, enable_should_save_is_saving_in_progress_check=True, enable_per_process_directory_creation=False), root_directory=gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x719d1f13dfd0> I0416 13:34:18.918512 124950050561152 checkpointing.py:301] Checkpoint manager created! W0416 13:34:18.935141 3876818 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0416 13:34:19.117327 124950050561152 nnx_wrappers.py:437] Unknown Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0416 13:34:19.117427 124950050561152 nnx_wrappers.py:437] Unknown Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0416 13:34:19.209739 124950050561152 attentions.py:1088] attentions/inputs_q Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0416 13:34:19.209815 124950050561152 attentions.py:1088] attentions/inputs_q Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0416 13:34:19.223901 124950050561152 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0416 13:34:19.223946 124950050561152 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0416 13:34:19.244273 124950050561152 attentions.py:1154] attentions/query Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0416 13:34:19.244328 124950050561152 attentions.py:1154] attentions/query Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0416 13:34:19.258689 124950050561152 attentions.py:1155] attentions/key Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0416 13:34:19.258737 124950050561152 attentions.py:1155] attentions/key Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0416 13:34:19.272888 124950050561152 attentions.py:1156] attentions/value Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0416 13:34:19.272936 124950050561152 attentions.py:1156] attentions/value Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0416 13:34:19.294417 124950050561152 attentions.py:1197] attentions/out Logical: bfloat16[8,2048,16,128]..................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0416 13:34:19.294474 124950050561152 attentions.py:1197] attentions/out Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0416 13:34:19.312626 124950050561152 linears.py:525] linears/x Logical: bfloat16[8,2048,7168]....................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0416 13:34:19.312676 124950050561152 linears.py:525] linears/x Physical: bfloat16[8,2048,7168]....................................... ('fsdp', None, None). I0416 13:34:19.495637 124950050561152 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint I0416 13:34:19.495728 124950050561152 checkpointing.py:581] restoring from this run's directory step 9 I0416 13:34:19.666965 124950050561152 checkpointer.py:304] Restoring checkpoint from gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints/9. I0416 13:34:20.199483 3878408 google_auth_provider.cc:149] Using credentials at ~/.config/gcloud/application_default_credentials.json I0416 13:34:20.199550 3878408 google_auth_provider.cc:156] Using OAuth2 AuthProvider I0416 13:34:26.122967 124950050561152 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/read/gbytes_per_sec: 2.014 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 6 seconds) (per-host) I0416 13:34:26.123232 124950050561152 checkpointer.py:318] Finished restoring checkpoint in 6.55 seconds from gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints/9. I0416 13:34:26.123307 124950050561152 standard_logger.py:34] {'step': 9, 'event_type': 'restore', 'directory': 'gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints', 'checkpointer_start_time': 1776346459.576284, 'checkpointer_duration_secs': 6.5469958782196045, 'checkpoint_manager_start_time': 1776346459.4959552, 'checkpoint_manager_duration_secs': 6.627328157424927} [DECOUPLED NO-OP] gcs_storage: using stubs. [DECOUPLED NO-OP] mldiagnostics: using stub. [DECOUPLED NO-OP] mldiagnostics: using stub. [DECOUPLED NO-OP] mldiagnostics: using stub. [DECOUPLED NO-OP] workload_monitor: using stub. [DECOUPLED NO-OP] vertex_tensorboard: using stub. fsdp: 8 I0416 13:34:26.490453 124950050561152 maxtext_utils.py:1620] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0416 13:34:26.490559 124950050561152 maxtext_utils.py:1620] params/params/decoder/layers/mlp/wi_0/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0416 13:34:26.490600 124950050561152 maxtext_utils.py:1620] params/params/decoder/layers/mlp/wi_1/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0416 13:34:26.490643 124950050561152 maxtext_utils.py:1620] params/params/decoder/layers/mlp/wo/kernel Shape: float32[7168,16,2048] Logical: P('mlp', 'layers', 'embed') Physical: (None, None, 'fsdp') I0416 13:34:26.490683 124950050561152 maxtext_utils.py:1620] params/params/decoder/layers/post_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0416 13:34:26.490710 124950050561152 maxtext_utils.py:1620] params/params/decoder/layers/pre_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0416 13:34:26.490748 124950050561152 maxtext_utils.py:1620] params/params/decoder/layers/self_attention/key/kernel Shape: float32[2048,16,16,128] Logical: P('embed', 'layers', 'kv_heads', 'kv_head_dim') Physical: ('fsdp', None, None, None) I0416 13:34:26.490786 124950050561152 maxtext_utils.py:1620] params/params/decoder/layers/self_attention/out/kernel Shape: float32[16,16,128,2048] Logical: P('heads', 'layers', 'kv', 'embed') Physical: (None, None, None, 'fsdp') I0416 13:34:26.490816 124950050561152 maxtext_utils.py:1620] params/params/decoder/layers/self_attention/query/kernel Shape: float32[2048,16,16,128] Logical: P('embed', 'layers', 'q_heads', 'kv') Physical: ('fsdp', None, None, None) I0416 13:34:26.490842 124950050561152 maxtext_utils.py:1620] params/params/decoder/layers/self_attention/value/kernel Shape: float32[2048,16,16,128] Logical: P('embed', 'layers', 'kv_heads', 'kv_head_dim') Physical: ('fsdp', None, None, None) I0416 13:34:26.490876 124950050561152 maxtext_utils.py:1620] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', None) I0416 13:34:26.490910 124950050561152 maxtext_utils.py:1620] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0416 13:34:26.911253 124950050561152 train.py:155] train/xent Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length'). I0416 13:34:26.911336 124950050561152 train.py:155] train/xent Physical: float32[8,2048]............................................. ('fsdp', None). I0416 13:34:26.924932 124950050561152 train.py:162] train/z_loss Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length'). I0416 13:34:26.924983 124950050561152 train.py:162] train/z_loss Physical: float32[8,2048]............................................. ('fsdp', None). W0416 13:34:27.557961 3876818 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0416 13:34:27.620945 124950050561152 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. I0416 13:34:27.621491 124950050561152 max_utils.py:194] tensorboardX not available; using no-op SummaryWriter. I0416 13:34:27.621632 124950050561152 metric_logger.py:289] number parameters: 1.104 billion W0416 13:34:28.440636 3876818 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0416 13:34:28.510805 124950050561152 checkpointing.py:772] Waiting for step 10 to finish before checkpoint... I0416 13:34:28.627326 124950050561152 checkpointing.py:776] Waited 0.11652660369873047 seconds for step 10 to finish before starting checkpointing. I0416 13:34:28.627778 124950050561152 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0416 13:34:28.627959 124950050561152 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 10 I0416 13:34:28.628334 124950050561152 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints/10. I0416 13:34:28.698311 124950050561152 signaling_client.py:373] Using ThreadSafeKeyValueSignalingClient I0416 13:34:28.782804 124851027183168 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints/10 I0416 13:34:28.790645 124950050561152 jax_array_handlers.py:347] Scheduling D2H of 39 prioritized jax.Array. I0416 13:34:28.790735 124950050561152 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 W0416 13:34:29.008423 3876818 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 13:34:29.031310 3876818 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 13:34:29.035950 3876818 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 13:34:29.040288 3876818 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 13:34:29.044375 3876818 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 13:34:29.048260 3876818 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 13:34:29.052213 3876818 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 13:34:29.056225 3876818 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0416 13:34:29.485467 124851016697408 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints/10/items I0416 13:34:29.624036 124850985240128 checkpoint.py:188] Wrote Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776346469404418471, 'commit_timestamp_nsecs': None, 'custom_metadata': {}}, json={"item_handlers": null, "metrics": {}, "performance_metrics": {}, "init_timestamp_nsecs": 1776346469404418471, "commit_timestamp_nsecs": null, "custom_metadata": {}} to gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints/10/_CHECKPOINT_METADATA I0416 13:34:37.011375 124950050561152 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 8.221155s I0416 13:34:37.015666 124950050561152 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 1.484 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 8 seconds) (per-host) I0416 13:34:37.015728 124950050561152 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 8.316256s (batch_requests_ready=0.088055s, total_serialization_initiated=8.224021s, others=0.004180s) I0416 13:34:37.015799 124950050561152 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 8.317064s (all_items=0.000027s, per_item={'items': '0.00002742'}, temp_paths=8.317036) I0416 13:34:37.017180 124851027183168 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0416 13:34:37.017264 124950050561152 async_checkpointer.py:561] Finished blocking save. Time taken: 8.389263s. Continuing background save to gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints/10. I0416 13:34:37.017458 124950050561152 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=10] Starting CheckpointManager Save Finalize thread=save_finalize I0416 13:34:37.017689 124851037668928 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0416 13:34:37.017795 124950050561152 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776346468.6277616, 'wait_for_prev_duration_secs': 4.1484832763671875e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776346468.6279798, 'checkpointer_blocking_duration_secs': 8.389395713806152, 'get_old_steps_start_time': 1776346477.0173922, 'get_old_steps_duration_secs': 2.7179718017578125e-05, 'checkpoint_manager_blocking_start_time': 1776346468.6276605, 'checkpoint_manager_blocking_duration_secs': 8.390108585357666} I0416 13:34:37.017925 124950050561152 checkpointing.py:408] Started an asynchronous checkpoint save for step 10 I0416 13:34:37.017971 124950050561152 max_utils.py:750] Memstats: After params initialized: I0416 13:34:37.018019 124950050561152 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_0(process=0,(0,0,0,0)) I0416 13:34:37.018057 124950050561152 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_1(process=0,(1,0,0,0)) I0416 13:34:37.018080 124950050561152 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_2(process=0,(0,1,0,0)) I0416 13:34:37.018098 124950050561152 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_3(process=0,(1,1,0,0)) I0416 13:34:37.018115 124950050561152 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_4(process=0,(0,2,0,0)) I0416 13:34:37.018131 124950050561152 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_5(process=0,(1,2,0,0)) I0416 13:34:37.018148 124950050561152 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_6(process=0,(0,3,0,0)) I0416 13:34:37.018165 124950050561152 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_7(process=0,(1,3,0,0)) W0416 13:34:37.023892 3876818 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 13:34:37.029673 3876818 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 13:34:37.034240 3876818 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0416 13:34:37.220781 124950050561152 metric_logger.py:185] completed step: 10, seconds: 0.889, TFLOP/s/device: 15.289, Tokens/s/device: 2304.565, total_weights: 16384, loss: 3.602 I0416 13:34:37.336826 124950050561152 metric_logger.py:185] completed step: 11, seconds: 8.708, TFLOP/s/device: 1.560, Tokens/s/device: 235.175, total_weights: 16384, loss: 3.101 I0416 13:34:37.455446 124950050561152 metric_logger.py:185] completed step: 12, seconds: 0.005, TFLOP/s/device: 2625.025, Tokens/s/device: 395672.334, total_weights: 16384, loss: 2.684 I0416 13:34:37.573686 124950050561152 metric_logger.py:185] completed step: 13, seconds: 0.117, TFLOP/s/device: 116.254, Tokens/s/device: 17522.995, total_weights: 16384, loss: 2.348 I0416 13:34:37.578016 124950050561152 checkpointing.py:772] Waiting for step 15 to finish before checkpoint... I0416 13:34:37.748213 124850995725888 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints/10/items/array_metadatas/process_0 I0416 13:34:37.810097 124950050561152 checkpointing.py:776] Waited 0.23203659057617188 seconds for step 15 to finish before starting checkpointing. I0416 13:34:37.810480 124950050561152 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=10][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0416 13:35:09.703611 124851016697408 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 32.687477s (commit=32.258418s, array_metadata_write=0.429059s) I0416 13:35:09.704690 124851027183168 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 308.175 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 41 seconds) (per-host) I0416 13:35:09.704748 124851027183168 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 32.687439s. I0416 13:35:10.124681 124851027183168 array_metadata_store.py:367] [process=0][thread=async_save] Skipped cross-host ArrayMetadata validation because only one process is found: process_index=0. I0416 13:35:10.312461 124850985240128 checkpoint.py:247] Updated Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776346469404418471, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} to gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints/10/_CHECKPOINT_METADATA I0416 13:35:10.540672 124851027183168 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389). I0416 13:35:10.541290 124851027183168 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.548873s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints/10/items I0416 13:35:10.541966 124851027183168 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints/10/items I0416 13:35:10.788297 124851027183168 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints/10 I0416 13:35:11.447236 124851027183168 atomicity.py:794] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints/10`. I0416 13:35:11.447828 124851027183168 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 42.819833s. directory=gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints/10 I0416 13:35:11.447898 124851027183168 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 34.430589s. I0416 13:35:11.448069 124851037668928 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0416 13:35:11.448180 124851037668928 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0416 13:35:11.448235 124851037668928 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=10] CheckpointManager Save Finalize is syncing with other hosts... I0416 13:35:11.448281 124851037668928 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=10] CheckpointManager Save Finalize is done on all hosts. I0416 13:35:11.448423 124950050561152 checkpoint_manager.py:2006] [process=0][thread=MainThread][step=10][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=10. W0416 13:35:11.448540 124950050561152 checkpoint_manager.py:1441] Waiting for previous save to complete took 33.638060 seconds. If this number is high, consider checkpointing less frequently. I0416 13:35:11.449244 124950050561152 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 15 I0416 13:35:11.449516 124950050561152 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints/15. I0416 13:35:11.623243 124851037668928 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints/15 I0416 13:35:11.633129 124950050561152 jax_array_handlers.py:347] Scheduling D2H of 39 prioritized jax.Array. I0416 13:35:11.633217 124950050561152 replica_slices.py:410] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False I0416 13:35:12.337309 124851016697408 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints/15/items I0416 13:35:19.633418 124950050561152 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 8.000687s I0416 13:35:19.637562 124950050561152 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 1.523 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 8 seconds) (per-host) I0416 13:35:19.637629 124950050561152 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 8.104556s (batch_requests_ready=0.096307s, total_serialization_initiated=8.004221s, others=0.004028s) I0416 13:35:19.637729 124950050561152 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 8.105076s (all_items=0.000013s, per_item={'items': '0.00001335'}, temp_paths=8.105063) I0416 13:35:19.639327 124851037668928 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0416 13:35:19.639408 124950050561152 async_checkpointer.py:561] Finished blocking save. Time taken: 8.190119s. Continuing background save to gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints/15. I0416 13:35:19.639611 124950050561152 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=15] Starting CheckpointManager Save Finalize thread=save_finalize I0416 13:35:19.639778 124851027183168 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0416 13:35:19.639880 124950050561152 standard_logger.py:34] {'step': 15, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776346477.8104577, 'wait_for_prev_duration_secs': 33.638059854507446, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776346511.449271, 'checkpointer_blocking_duration_secs': 8.190244913101196, 'get_old_steps_start_time': 1776346519.6395354, 'get_old_steps_duration_secs': 2.765655517578125e-05, 'checkpoint_manager_blocking_start_time': 1776346477.8103912, 'checkpoint_manager_blocking_duration_secs': 41.829463958740234} I0416 13:35:19.640008 124950050561152 checkpointing.py:408] Started an asynchronous checkpoint save for step 15 I0416 13:35:19.640663 124950050561152 metric_logger.py:185] completed step: 14, seconds: 0.119, TFLOP/s/device: 114.536, Tokens/s/device: 17264.052, total_weights: 16384, loss: 2.083 I0416 13:35:19.647648 124950050561152 metric_logger.py:185] completed step: 15, seconds: 0.118, TFLOP/s/device: 115.132, Tokens/s/device: 17353.873, total_weights: 16384, loss: 1.880 I0416 13:35:19.763237 124950050561152 metric_logger.py:185] completed step: 16, seconds: 42.068, TFLOP/s/device: 0.323, Tokens/s/device: 48.683, total_weights: 16384, loss: 1.726 I0416 13:35:19.881700 124950050561152 metric_logger.py:185] completed step: 17, seconds: 0.006, TFLOP/s/device: 2461.436, Tokens/s/device: 371014.493, total_weights: 16384, loss: 1.610 I0416 13:35:20.000335 124950050561152 metric_logger.py:185] completed step: 18, seconds: 0.117, TFLOP/s/device: 116.540, Tokens/s/device: 17566.130, total_weights: 16384, loss: 1.521 I0416 13:35:20.118196 124950050561152 checkpointing.py:772] Waiting for step 19 to finish before checkpoint... I0416 13:35:20.119064 124950050561152 checkpointing.py:776] Waited 0.0008695125579833984 seconds for step 19 to finish before starting checkpointing. I0416 13:35:20.119325 124950050561152 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=15][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0416 13:35:20.419287 124852474218048 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints/15/items/array_metadatas/process_0 I0416 13:35:48.824065 124851016697408 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 29.185611s (commit=28.784544s, array_metadata_write=0.401067s) I0416 13:35:48.825109 124851037668928 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 338.861 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 37 seconds) (per-host) I0416 13:35:48.825212 124851037668928 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 29.185759s. I0416 13:35:49.229890 124851037668928 array_metadata_store.py:367] [process=0][thread=async_save] Skipped cross-host ArrayMetadata validation because only one process is found: process_index=0. I0416 13:35:49.684587 124851037668928 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389). I0416 13:35:49.685189 124851037668928 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.601903s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints/15/items I0416 13:35:49.685833 124851037668928 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints/15/items I0416 13:35:49.941366 124851037668928 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints/15 I0416 13:35:50.634039 124851037668928 atomicity.py:794] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints/15`. I0416 13:35:50.634651 124851037668928 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 39.185367s. directory=gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints/15 I0416 13:35:50.634736 124851037668928 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 30.995285s. I0416 13:35:50.634901 124851027183168 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0416 13:35:50.635005 124851027183168 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0416 13:35:50.635084 124851027183168 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=15] CheckpointManager Save Finalize is syncing with other hosts... I0416 13:35:50.635133 124851027183168 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=15] CheckpointManager Save Finalize is done on all hosts. I0416 13:35:50.635526 124950050561152 checkpoint_manager.py:2006] [process=0][thread=MainThread][step=15][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=15. W0416 13:35:50.635637 124950050561152 checkpoint_manager.py:1441] Waiting for previous save to complete took 30.516321 seconds. If this number is high, consider checkpointing less frequently. I0416 13:35:50.635850 124950050561152 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 19 I0416 13:35:50.636158 124950050561152 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints/19. I0416 13:35:50.809694 124950050561152 jax_array_handlers.py:347] Scheduling D2H of 39 prioritized jax.Array. I0416 13:35:50.809794 124950050561152 replica_slices.py:410] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False I0416 13:35:50.809874 124851027183168 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints/19 I0416 13:35:51.518242 124852463732288 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints/19/items I0416 13:36:03.893801 124950050561152 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 13.084824s I0416 13:36:03.898027 124950050561152 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 959.436 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 13 seconds) (per-host) I0416 13:36:03.898101 124950050561152 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 13.171159s (batch_requests_ready=0.079060s, total_serialization_initiated=13.087977s, others=0.004122s) I0416 13:36:03.898169 124950050561152 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 13.171635s (all_items=0.000014s, per_item={'items': '0.00001359'}, temp_paths=13.171621) I0416 13:36:03.899633 124851037668928 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0416 13:36:03.899719 124950050561152 async_checkpointer.py:561] Finished blocking save. Time taken: 13.263829s. Continuing background save to gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints/19. I0416 13:36:03.899890 124950050561152 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=19] Starting CheckpointManager Save Finalize thread=save_finalize I0416 13:36:03.900040 124852411303488 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0416 13:36:03.900151 124950050561152 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776346520.1193006, 'wait_for_prev_duration_secs': 30.51632070541382, 'time_between_consecutive_saves_sec': 8.671004295349121, 'checkpointer_blocking_start_time': 1776346550.6358728, 'checkpointer_blocking_duration_secs': 13.263944387435913, 'get_old_steps_start_time': 1776346563.8998291, 'get_old_steps_duration_secs': 2.765655517578125e-05, 'checkpoint_manager_blocking_start_time': 1776346520.1192682, 'checkpoint_manager_blocking_duration_secs': 43.78085708618164} I0416 13:36:03.900264 124950050561152 checkpointing.py:408] Started an asynchronous checkpoint save for step 19 I0416 13:36:03.900294 124950050561152 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=19][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0416 13:36:04.636440 124852421789248 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints/19/items/array_metadatas/process_0 I0416 13:36:43.578328 124852474218048 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 39.679568s (commit=39.228402s, array_metadata_write=0.451165s) I0416 13:36:43.579462 124851037668928 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 239.095 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 52 seconds) (per-host) I0416 13:36:43.579527 124851037668928 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 39.679767s. I0416 13:36:43.978162 124851037668928 array_metadata_store.py:367] [process=0][thread=async_save] Skipped cross-host ArrayMetadata validation because only one process is found: process_index=0. I0416 13:36:44.400296 124851037668928 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389). I0416 13:36:44.400915 124851037668928 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.565991s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints/19/items I0416 13:36:44.401598 124851037668928 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints/19/items I0416 13:36:44.659749 124851037668928 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints/19 I0416 13:36:45.366609 124851037668928 atomicity.py:794] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints/19`. I0416 13:36:45.367259 124851037668928 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 54.731375s. directory=gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_15_ocdbt_true/checkpoints/19 I0416 13:36:45.367323 124851037668928 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 41.467563s. I0416 13:36:45.367486 124852411303488 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0416 13:36:45.367586 124852411303488 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0416 13:36:45.367653 124852411303488 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=19] CheckpointManager Save Finalize is syncing with other hosts... I0416 13:36:45.367698 124852411303488 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=19] CheckpointManager Save Finalize is done on all hosts. I0416 13:36:45.368020 124950050561152 checkpoint_manager.py:2006] [process=0][thread=MainThread][step=19][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=19. I0416 13:36:45.368565 124950050561152 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0416 13:36:45.369815 124950050561152 metric_logger.py:185] completed step: 19, seconds: 0.119, TFLOP/s/device: 114.645, Tokens/s/device: 17280.513, total_weights: 16384, loss: 1.449 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops
2026-04-16 19:13:54.867356: E external/local_xla/xla/stream_executor/cuda/cuda_platform.cc:51] failed call to cuInit: INTERNAL: CUDA error: Failed call to cuInit: UNKNOWN ERROR (303) I0416 19:13:55.006357 130218018897024 max_utils.py:238] Skipping jax distributed system due to skip_jax_distributed_system=True flag. I0416 19:14:49.103678 130218018897024 max_utils.py:800] System Information: Jax Version: 0.9.2 I0416 19:14:49.103794 130218018897024 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0416 19:14:49.103835 130218018897024 max_utils.py:802] System Information: Jax Backend: PJRT C API TFRT TPU v6 lite Built on Apr 6 2026 20:48:10 (1775533690) cl/895581894 I0416 19:14:49.103867 130218018897024 train_utils.py:364] WARNING: 'dataset_path' might be pointing your local file system I0416 19:14:49.103893 130218018897024 train_utils.py:377] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0416 19:14:49.103998 130218018897024 train.py:811] [DECOUPLED NO-OP] skipping cloud diagnostics wrapper. W0416 19:14:49.200471 4025155 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0416 19:14:49.604682 130218018897024 maxtext_utils.py:1687] Num_devices: 8, shape (1, 1, 1, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0416 19:14:49.604862 130218018897024 maxtext_utils.py:1687] Num_devices: 8, shape (1, 1, 1, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0416 19:14:49.605154 130218018897024 checkpointing.py:688] Setting up checkpoint logger... I0416 19:14:49.605197 130218018897024 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0416 19:14:49.605284 130218018897024 pytree_checkpoint_handler.py:577] save_device_host_concurrent_bytes=None I0416 19:14:49.606004 130218018897024 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 0x766e2919ecc0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0416 19:14:51.264464 130218018897024 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0416 19:14:51.264698 130218018897024 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 0x7669230a67e0>}, handler_registry=None I0416 19:14:51.265076 130218018897024 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7669230a67e0>` for item "items" and save args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>` to `_handler_registry`. I0416 19:14:51.265120 130218018897024 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7667abb365d0>` for item "metrics" and save args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>` to `_handler_registry`. I0416 19:14:51.265153 130218018897024 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 0x7669230a67e0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7669230a67e0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7667abb365d0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7667abb365d0>}). I0416 19:14:51.265442 130218018897024 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.28 I0416 19:14:51.265497 130218018897024 async_checkpointer.py:177] [process=0][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>.<lambda> at 0x7667abb31ee0> timeout: 600 secs and primary_host=0 for async checkpoint writes I0416 19:14:51.702015 130111900747328 checkpoint.py:228] Read Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776366706966070084, 'commit_timestamp_nsecs': 1776366753350326040, 'custom_metadata': {}} from gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints/5/_CHECKPOINT_METADATA I0416 19:14:51.788295 130111911233088 checkpoint_manager.py:1847] Missing metrics for step 0 I0416 19:14:51.818488 130218018897024 checkpoint_manager.py:1788] Found 3 checkpoint steps in gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints I0416 19:14:51.818969 130218018897024 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=5), 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_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7667abb35ca0> I0416 19:14:51.819084 130218018897024 checkpointing.py:302] Checkpoint manager created! W0416 19:14:51.836177 4025155 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0416 19:14:52.024591 130218018897024 nnx_wrappers.py:437] Unknown Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0416 19:14:52.024780 130218018897024 nnx_wrappers.py:437] Unknown Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0416 19:14:52.118409 130218018897024 attentions.py:1088] attentions/inputs_q Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0416 19:14:52.118487 130218018897024 attentions.py:1088] attentions/inputs_q Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0416 19:14:52.132665 130218018897024 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0416 19:14:52.132710 130218018897024 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0416 19:14:52.154785 130218018897024 attentions.py:1154] attentions/query Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0416 19:14:52.154844 130218018897024 attentions.py:1154] attentions/query Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0416 19:14:52.169039 130218018897024 attentions.py:1155] attentions/key Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0416 19:14:52.169100 130218018897024 attentions.py:1155] attentions/key Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0416 19:14:52.183244 130218018897024 attentions.py:1156] attentions/value Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0416 19:14:52.183299 130218018897024 attentions.py:1156] attentions/value Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0416 19:14:52.204933 130218018897024 attentions.py:1197] attentions/out Logical: bfloat16[8,2048,16,128]..................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0416 19:14:52.204992 130218018897024 attentions.py:1197] attentions/out Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0416 19:14:52.222778 130218018897024 linears.py:525] linears/x Logical: bfloat16[8,2048,7168]....................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0416 19:14:52.222827 130218018897024 linears.py:525] linears/x Physical: bfloat16[8,2048,7168]....................................... ('fsdp', None, None). I0416 19:14:52.410647 130218018897024 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0416 19:14:52.410754 130218018897024 checkpointing.py:582] restoring from this run's directory step 9 I0416 19:14:52.580690 130218018897024 checkpointer.py:304] Restoring checkpoint from gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints/9. I0416 19:14:53.129246 4026702 google_auth_provider.cc:149] Using credentials at ~/.config/gcloud/application_default_credentials.json I0416 19:14:53.129312 4026702 google_auth_provider.cc:156] Using OAuth2 AuthProvider I0416 19:14:59.099393 130218018897024 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/read/gbytes_per_sec: 1.998 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 6 seconds) (per-host) I0416 19:14:59.099646 130218018897024 checkpointer.py:318] Finished restoring checkpoint in 6.61 seconds from gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints/9. I0416 19:14:59.099726 130218018897024 standard_logger.py:34] {'step': 9, 'event_type': 'restore', 'directory': 'gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints', 'checkpointer_start_time': 1776366892.4922216, 'checkpointer_duration_secs': 6.607473134994507, 'checkpoint_manager_start_time': 1776366892.4111378, 'checkpoint_manager_duration_secs': 6.688559055328369} [DECOUPLED NO-OP] gcs_storage: using stubs. [DECOUPLED NO-OP] mldiagnostics: using stub. [DECOUPLED NO-OP] mldiagnostics: using stub. [DECOUPLED NO-OP] mldiagnostics: using stub. [DECOUPLED NO-OP] workload_monitor: using stub. [DECOUPLED NO-OP] vertex_tensorboard: using stub. fsdp: 8 I0416 19:14:59.639593 130218018897024 maxtext_utils.py:1796] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0416 19:14:59.639704 130218018897024 maxtext_utils.py:1796] params/params/decoder/layers/mlp/wi_0/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0416 19:14:59.639745 130218018897024 maxtext_utils.py:1796] params/params/decoder/layers/mlp/wi_1/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0416 19:14:59.639791 130218018897024 maxtext_utils.py:1796] params/params/decoder/layers/mlp/wo/kernel Shape: float32[7168,16,2048] Logical: P('mlp', 'layers', 'embed') Physical: (None, None, 'fsdp') I0416 19:14:59.639831 130218018897024 maxtext_utils.py:1796] params/params/decoder/layers/post_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0416 19:14:59.639859 130218018897024 maxtext_utils.py:1796] params/params/decoder/layers/pre_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0416 19:14:59.639901 130218018897024 maxtext_utils.py:1796] params/params/decoder/layers/self_attention/key/kernel Shape: float32[2048,16,16,128] Logical: P('embed', 'layers', 'kv_heads', 'kv_head_dim') Physical: ('fsdp', None, None, None) I0416 19:14:59.639944 130218018897024 maxtext_utils.py:1796] params/params/decoder/layers/self_attention/out/kernel Shape: float32[16,16,128,2048] Logical: P('heads', 'layers', 'kv', 'embed') Physical: (None, None, None, 'fsdp') I0416 19:14:59.639974 130218018897024 maxtext_utils.py:1796] params/params/decoder/layers/self_attention/query/kernel Shape: float32[2048,16,16,128] Logical: P('embed', 'layers', 'q_heads', 'kv') Physical: ('fsdp', None, None, None) I0416 19:14:59.640001 130218018897024 maxtext_utils.py:1796] params/params/decoder/layers/self_attention/value/kernel Shape: float32[2048,16,16,128] Logical: P('embed', 'layers', 'kv_heads', 'kv_head_dim') Physical: ('fsdp', None, None, None) I0416 19:14:59.640037 130218018897024 maxtext_utils.py:1796] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', None) I0416 19:14:59.640091 130218018897024 maxtext_utils.py:1796] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0416 19:15:00.072540 130218018897024 train.py:157] train/xent Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length'). I0416 19:15:00.072630 130218018897024 train.py:157] train/xent Physical: float32[8,2048]............................................. ('fsdp', None). I0416 19:15:00.086327 130218018897024 train.py:164] train/z_loss Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length'). I0416 19:15:00.086377 130218018897024 train.py:164] train/z_loss Physical: float32[8,2048]............................................. ('fsdp', None). W0416 19:15:00.713595 4025155 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0416 19:15:00.781527 130218018897024 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. I0416 19:15:00.782090 130218018897024 max_utils.py:194] tensorboardX not available; using no-op SummaryWriter. I0416 19:15:00.782234 130218018897024 metric_logger.py:289] number parameters: 1.104 billion W0416 19:15:01.633318 4025155 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0416 19:15:01.703063 130218018897024 checkpointing.py:794] Waiting for step 10 to finish before checkpoint... I0416 19:15:01.820204 130218018897024 checkpointing.py:798] Waited 0.11713862419128418 seconds for step 10 to finish before starting checkpointing. I0416 19:15:01.820586 130218018897024 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0416 19:15:01.820737 130218018897024 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 10 I0416 19:15:01.821006 130218018897024 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints/10. I0416 19:15:01.905869 130218018897024 signaling_client.py:373] Using ThreadSafeKeyValueSignalingClient I0416 19:15:01.988080 130110254483008 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints/10 I0416 19:15:02.002857 130218018897024 jax_array_handlers.py:347] Scheduling D2H of 39 prioritized jax.Array. I0416 19:15:02.002948 130218018897024 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 W0416 19:15:02.223504 4025155 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 19:15:02.240230 4025155 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 19:15:02.252744 4025155 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 19:15:02.257103 4025155 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 19:15:02.260970 4025155 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 19:15:02.264833 4025155 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 19:15:02.268564 4025155 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 19:15:02.272364 4025155 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0416 19:15:02.719580 130110243997248 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints/10/items I0416 19:15:02.883416 130110212539968 checkpoint.py:188] Wrote Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776366902628957020, 'commit_timestamp_nsecs': None, 'custom_metadata': {}}, json={"item_handlers": null, "metrics": {}, "performance_metrics": {}, "init_timestamp_nsecs": 1776366902628957020, "commit_timestamp_nsecs": null, "custom_metadata": {}} to gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints/10/_CHECKPOINT_METADATA I0416 19:15:13.753791 130218018897024 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 11.751334s I0416 19:15:13.754338 130218018897024 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 1.042 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 11 seconds) (per-host) I0416 19:15:13.754399 130218018897024 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 11.847324s (batch_requests_ready=0.092656s, total_serialization_initiated=11.754231s, others=0.000437s) I0416 19:15:13.754465 130218018897024 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 11.848136s (all_items=0.000018s, per_item={'items': '0.00001836'}, temp_paths=11.848117) I0416 19:15:13.759515 130110264968768 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0416 19:15:13.759616 130218018897024 async_checkpointer.py:561] Finished blocking save. Time taken: 11.938838s. Continuing background save to gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints/10. I0416 19:15:13.759821 130218018897024 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=10] Starting CheckpointManager Save Finalize thread=save_finalize I0416 19:15:13.759986 130110254483008 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0416 19:15:13.760094 130218018897024 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776366901.8205745, 'wait_for_prev_duration_secs': 4.553794860839844e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776366901.8207579, 'checkpointer_blocking_duration_secs': 11.93897795677185, 'get_old_steps_start_time': 1776366913.7597535, 'get_old_steps_duration_secs': 2.956390380859375e-05, 'checkpoint_manager_blocking_start_time': 1776366901.8204916, 'checkpoint_manager_blocking_duration_secs': 11.939573287963867} I0416 19:15:13.760204 130218018897024 checkpointing.py:409] Started an asynchronous checkpoint save for step 10 I0416 19:15:13.760244 130218018897024 max_utils.py:750] Memstats: After params initialized: I0416 19:15:13.760291 130218018897024 max_utils.py:756] Using (GB) 1.6 / 31.25 (5.120000%) on TPU_0(process=0,(0,0,0,0)) I0416 19:15:13.760316 130218018897024 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_1(process=0,(1,0,0,0)) I0416 19:15:13.760335 130218018897024 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_2(process=0,(0,1,0,0)) I0416 19:15:13.760354 130218018897024 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_3(process=0,(1,1,0,0)) I0416 19:15:13.760371 130218018897024 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_4(process=0,(0,2,0,0)) I0416 19:15:13.760388 130218018897024 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_5(process=0,(1,2,0,0)) I0416 19:15:13.760406 130218018897024 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_6(process=0,(0,3,0,0)) I0416 19:15:13.760422 130218018897024 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_7(process=0,(1,3,0,0)) W0416 19:15:13.766161 4025155 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 19:15:13.772333 4025155 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 19:15:13.776751 4025155 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0416 19:15:13.963966 130218018897024 metric_logger.py:185] completed step: 10, seconds: 0.920, TFLOP/s/device: 14.763, Tokens/s/device: 2225.221, total_weights: 16384, loss: 3.602 I0416 19:15:14.080229 130218018897024 metric_logger.py:185] completed step: 11, seconds: 12.259, TFLOP/s/device: 1.108, Tokens/s/device: 167.056, total_weights: 16384, loss: 3.101 I0416 19:15:14.198359 130218018897024 metric_logger.py:185] completed step: 12, seconds: 0.005, TFLOP/s/device: 2627.563, Tokens/s/device: 396054.922, total_weights: 16384, loss: 2.684 I0416 19:15:14.316659 130218018897024 metric_logger.py:185] completed step: 13, seconds: 0.117, TFLOP/s/device: 116.092, Tokens/s/device: 17498.590, total_weights: 16384, loss: 2.348 I0416 19:15:14.321238 130218018897024 checkpointing.py:794] Waiting for step 15 to finish before checkpoint... I0416 19:15:14.530403 130110223025728 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints/10/items/array_metadatas/process_0 I0416 19:15:14.552541 130218018897024 checkpointing.py:798] Waited 0.23127126693725586 seconds for step 15 to finish before starting checkpointing. I0416 19:15:14.552916 130218018897024 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=10][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0416 19:15:56.377676 130110243997248 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 42.618833s (commit=42.149820s, array_metadata_write=0.469014s) I0416 19:15:56.378816 130110264968768 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 231.988 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 54 seconds) (per-host) I0416 19:15:56.378881 130110264968768 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.619214s. I0416 19:15:56.818104 130110264968768 array_metadata_store.py:367] [process=0][thread=async_save] Skipped cross-host ArrayMetadata validation because only one process is found: process_index=0. I0416 19:15:57.025914 130110212539968 checkpoint.py:247] Updated Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776366902628957020, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} to gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints/10/_CHECKPOINT_METADATA I0416 19:15:57.230852 130110264968768 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389). I0416 19:15:57.231494 130110264968768 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.544443s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints/10/items I0416 19:15:57.232190 130110264968768 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints/10/items I0416 19:15:57.467955 130110264968768 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints/10 I0416 19:15:58.138545 130110264968768 atomicity.py:794] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints/10`. I0416 19:15:58.139175 130110264968768 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 56.318407s. directory=gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints/10 I0416 19:15:58.139257 130110264968768 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 44.379590s. I0416 19:15:58.139435 130110254483008 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0416 19:15:58.139546 130110254483008 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0416 19:15:58.139620 130110254483008 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=10] CheckpointManager Save Finalize is syncing with other hosts... I0416 19:15:58.139670 130110254483008 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=10] CheckpointManager Save Finalize is done on all hosts. I0416 19:15:58.139808 130218018897024 checkpoint_manager.py:2006] [process=0][thread=MainThread][step=10][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=10. W0416 19:15:58.139925 130218018897024 checkpoint_manager.py:1441] Waiting for previous save to complete took 43.587008 seconds. If this number is high, consider checkpointing less frequently. I0416 19:15:58.140758 130218018897024 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 15 I0416 19:15:58.141036 130218018897024 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints/15. I0416 19:15:58.306306 130218018897024 jax_array_handlers.py:347] Scheduling D2H of 39 prioritized jax.Array. I0416 19:15:58.306396 130218018897024 replica_slices.py:410] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False I0416 19:15:58.314859 130110254483008 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints/15 I0416 19:15:59.054916 130110202054208 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints/15/items I0416 19:16:11.837473 130218018897024 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 13.531593s I0416 19:16:11.841654 130218018897024 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 927.651 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 13 seconds) (per-host) I0416 19:16:11.841717 130218018897024 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 13.622434s (batch_requests_ready=0.082870s, total_serialization_initiated=13.535495s, others=0.004069s) I0416 19:16:11.841793 130218018897024 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 13.622923s (all_items=0.000015s, per_item={'items': '0.00001502'}, temp_paths=13.622908) I0416 19:16:11.843438 130111795889728 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0416 19:16:11.843518 130218018897024 async_checkpointer.py:561] Finished blocking save. Time taken: 13.702715s. Continuing background save to gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints/15. I0416 19:16:11.843721 130218018897024 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=15] Starting CheckpointManager Save Finalize thread=save_finalize I0416 19:16:11.843879 130110264968768 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0416 19:16:11.843977 130218018897024 standard_logger.py:34] {'step': 15, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776366914.5528932, 'wait_for_prev_duration_secs': 43.587007999420166, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776366958.140784, 'checkpointer_blocking_duration_secs': 13.702839374542236, 'get_old_steps_start_time': 1776366971.8436484, 'get_old_steps_duration_secs': 2.9802322387695312e-05, 'checkpoint_manager_blocking_start_time': 1776366914.552828, 'checkpoint_manager_blocking_duration_secs': 57.29112434387207} I0416 19:16:11.844125 130218018897024 checkpointing.py:409] Started an asynchronous checkpoint save for step 15 I0416 19:16:11.844496 130218018897024 metric_logger.py:185] completed step: 14, seconds: 0.118, TFLOP/s/device: 115.208, Tokens/s/device: 17365.351, total_weights: 16384, loss: 2.083 I0416 19:16:11.851273 130218018897024 metric_logger.py:185] completed step: 15, seconds: 0.119, TFLOP/s/device: 114.602, Tokens/s/device: 17274.100, total_weights: 16384, loss: 1.880 I0416 19:16:11.967499 130218018897024 metric_logger.py:185] completed step: 16, seconds: 57.528, TFLOP/s/device: 0.236, Tokens/s/device: 35.600, total_weights: 16384, loss: 1.726 I0416 19:16:12.085684 130218018897024 metric_logger.py:185] completed step: 17, seconds: 0.005, TFLOP/s/device: 2626.040, Tokens/s/device: 395825.280, total_weights: 16384, loss: 1.610 I0416 19:16:12.203765 130218018897024 metric_logger.py:185] completed step: 18, seconds: 0.117, TFLOP/s/device: 116.085, Tokens/s/device: 17497.544, total_weights: 16384, loss: 1.521 I0416 19:16:12.322127 130218018897024 checkpointing.py:794] Waiting for step 19 to finish before checkpoint... I0416 19:16:12.322865 130218018897024 checkpointing.py:798] Waited 0.0007605552673339844 seconds for step 19 to finish before starting checkpointing. I0416 19:16:12.323110 130218018897024 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=15][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0416 19:16:12.606858 130111848318528 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints/15/items/array_metadatas/process_0 I0416 19:16:50.815534 130111837832768 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 38.973011s (commit=38.504669s, array_metadata_write=0.468342s) I0416 19:16:50.816646 130111795889728 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 240.255 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 52 seconds) (per-host) I0416 19:16:50.816767 130111795889728 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 38.973199s. I0416 19:16:51.315480 130111795889728 array_metadata_store.py:367] [process=0][thread=async_save] Skipped cross-host ArrayMetadata validation because only one process is found: process_index=0. I0416 19:16:51.749561 130111795889728 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389). I0416 19:16:51.749743 130111795889728 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.576506s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints/15/items I0416 19:16:51.750443 130111795889728 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints/15/items I0416 19:16:51.993901 130111795889728 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints/15 I0416 19:16:52.659713 130111795889728 atomicity.py:794] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints/15`. I0416 19:16:52.660346 130111795889728 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 54.519546s. directory=gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints/15 I0416 19:16:52.660423 130111795889728 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 40.816859s. I0416 19:16:52.660614 130110264968768 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0416 19:16:52.660729 130110264968768 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0416 19:16:52.660813 130110264968768 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=15] CheckpointManager Save Finalize is syncing with other hosts... I0416 19:16:52.660862 130110264968768 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=15] CheckpointManager Save Finalize is done on all hosts. I0416 19:16:52.661484 130218018897024 checkpoint_manager.py:2006] [process=0][thread=MainThread][step=15][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=15. W0416 19:16:52.661613 130218018897024 checkpoint_manager.py:1441] Waiting for previous save to complete took 40.338498 seconds. If this number is high, consider checkpointing less frequently. I0416 19:16:52.661861 130218018897024 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 19 I0416 19:16:52.662182 130218018897024 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints/19. I0416 19:16:52.825693 130218018897024 jax_array_handlers.py:347] Scheduling D2H of 39 prioritized jax.Array. I0416 19:16:52.825785 130218018897024 replica_slices.py:410] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False I0416 19:16:52.876900 130110264968768 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints/19 I0416 19:16:53.590806 130111785403968 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints/19/items I0416 19:17:02.140474 130218018897024 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 9.315165s I0416 19:17:02.144788 130218018897024 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 1.311 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 9 seconds) (per-host) I0416 19:17:02.144845 130218018897024 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 9.412486s (batch_requests_ready=0.089964s, total_serialization_initiated=9.318347s, others=0.004175s) I0416 19:17:02.144919 130218018897024 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 9.413186s (all_items=0.000020s, per_item={'items': '0.00002003'}, temp_paths=9.413166) I0416 19:17:02.146534 130111795889728 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0416 19:17:02.146656 130218018897024 async_checkpointer.py:561] Finished blocking save. Time taken: 9.484749s. Continuing background save to gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints/19. I0416 19:17:02.146850 130218018897024 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=19] Starting CheckpointManager Save Finalize thread=save_finalize I0416 19:17:02.146999 130111806375488 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0416 19:17:02.147106 130218018897024 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776366972.3230832, 'wait_for_prev_duration_secs': 40.33849787712097, 'time_between_consecutive_saves_sec': 14.1833975315094, 'checkpointer_blocking_start_time': 1776367012.6618874, 'checkpointer_blocking_duration_secs': 9.484877347946167, 'get_old_steps_start_time': 1776367022.146782, 'get_old_steps_duration_secs': 3.337860107421875e-05, 'checkpoint_manager_blocking_start_time': 1776366972.323039, 'checkpoint_manager_blocking_duration_secs': 49.82404398918152} I0416 19:17:02.147217 130218018897024 checkpointing.py:409] Started an asynchronous checkpoint save for step 19 I0416 19:17:02.147251 130218018897024 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=19][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0416 19:17:02.907888 130111848318528 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints/19/items/array_metadatas/process_0 I0416 19:17:41.641010 130110264968768 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 39.495480s (commit=39.081791s, array_metadata_write=0.413688s) I0416 19:17:41.642243 130111795889728 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 258.369 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 48 seconds) (per-host) I0416 19:17:41.642351 130111795889728 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 39.495652s. I0416 19:17:42.070719 130111795889728 array_metadata_store.py:367] [process=0][thread=async_save] Skipped cross-host ArrayMetadata validation because only one process is found: process_index=0. I0416 19:17:42.516056 130111795889728 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389). I0416 19:17:42.516679 130111795889728 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.593786s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints/19/items I0416 19:17:42.517347 130111795889728 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints/19/items I0416 19:17:42.755783 130111795889728 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints/19 I0416 19:17:43.416232 130111795889728 atomicity.py:794] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints/19`. I0416 19:17:43.416841 130111795889728 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 50.754941s. directory=gs://wanglance-maxtext/linen_ckpt_feat_nnx_post_train_fixes_20260416_181521/linen_feat_nnx_post_train_fixes_20260416_181521_15_ocdbt_true/checkpoints/19 I0416 19:17:43.416908 130111795889728 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 41.270209s. I0416 19:17:43.417090 130111806375488 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0416 19:17:43.417200 130111806375488 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0416 19:17:43.417269 130111806375488 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=19] CheckpointManager Save Finalize is syncing with other hosts... I0416 19:17:43.417313 130111806375488 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=19] CheckpointManager Save Finalize is done on all hosts. I0416 19:17:43.417852 130218018897024 checkpoint_manager.py:2006] [process=0][thread=MainThread][step=19][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=19. I0416 19:17:43.417995 130218018897024 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0416 19:17:43.419283 130218018897024 metric_logger.py:185] completed step: 19, seconds: 0.118, TFLOP/s/device: 114.879, Tokens/s/device: 17315.871, total_weights: 16384, loss: 1.449 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops