2026-04-16 13:26:31.508455: 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 13:26:31.625349 129478508436608 max_utils.py:238] Skipping jax distributed system due to skip_jax_distributed_system=True flag. I0416 13:27:27.036163 129478508436608 max_utils.py:800] System Information: Jax Version: 0.9.2 I0416 13:27:27.036267 129478508436608 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0416 13:27:27.036302 129478508436608 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 13:27:27.036329 129478508436608 train_utils.py:334] WARNING: 'dataset_path' might be pointing your local file system I0416 13:27:27.036350 129478508436608 train_utils.py:347] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0416 13:27:27.036426 129478508436608 train.py:683] [DECOUPLED NO-OP] skipping cloud diagnostics wrapper. W0416 13:27:27.128619 3871218 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0416 13:27:27.532560 129478508436608 maxtext_utils.py:1517] Num_devices: 8, shape (1, 1, 1, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0416 13:27:27.532831 129478508436608 checkpointing.py:677] Setting up checkpoint logger... I0416 13:27:27.532878 129478508436608 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True I0416 13:27:27.532921 129478508436608 pytree_checkpoint_handler.py:577] save_device_host_concurrent_bytes=None I0416 13:27:27.533424 129478508436608 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 0x75c1f9900a10>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0416 13:27:29.167531 129478508436608 checkpointing.py:265] Enabling policy for fixed interval checkpointing. I0416 13:27:29.167713 129478508436608 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 0x75bb7ef0bce0>}, handler_registry=None I0416 13:27:29.167992 129478508436608 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x75bb7ef0bce0>` 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 13:27:29.168035 129478508436608 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x75bba197edb0>` 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 13:27:29.168080 129478508436608 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 0x75bb7ef0bce0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x75bb7ef0bce0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x75bba197edb0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x75bba197edb0>}). I0416 13:27:29.168551 129478508436608 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.28 I0416 13:27:29.584882 129372379940416 checkpoint.py:228] Read Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776345923517648629, 'commit_timestamp_nsecs': 1776345961029656066, 'custom_metadata': {}} from gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_14_async_ckpt_false/checkpoints/9/_CHECKPOINT_METADATA I0416 13:27:29.663767 129372379940416 checkpoint_manager.py:1847] Missing metrics for step 9 I0416 13:27:29.702221 129478508436608 checkpoint_manager.py:1788] Found 3 checkpoint steps in gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_14_async_ckpt_false/checkpoints I0416 13:27:29.702716 129478508436608 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=False, 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_14_async_ckpt_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x75bb7ef2c950> I0416 13:27:29.702802 129478508436608 checkpointing.py:301] Checkpoint manager created! W0416 13:27:29.719651 3871218 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0416 13:27:29.902375 129478508436608 nnx_wrappers.py:437] Unknown Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0416 13:27:29.902475 129478508436608 nnx_wrappers.py:437] Unknown Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0416 13:27:29.997989 129478508436608 attentions.py:1088] attentions/inputs_q Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0416 13:27:29.998132 129478508436608 attentions.py:1088] attentions/inputs_q Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0416 13:27:30.012453 129478508436608 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0416 13:27:30.012501 129478508436608 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0416 13:27:30.033600 129478508436608 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 13:27:30.033654 129478508436608 attentions.py:1154] attentions/query Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0416 13:27:30.048016 129478508436608 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 13:27:30.048075 129478508436608 attentions.py:1155] attentions/key Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0416 13:27:30.062425 129478508436608 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 13:27:30.062472 129478508436608 attentions.py:1156] attentions/value Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0416 13:27:30.084287 129478508436608 attentions.py:1197] attentions/out Logical: bfloat16[8,2048,16,128]..................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0416 13:27:30.084345 129478508436608 attentions.py:1197] attentions/out Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0416 13:27:30.102834 129478508436608 linears.py:525] linears/x Logical: bfloat16[8,2048,7168]....................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0416 13:27:30.102895 129478508436608 linears.py:525] linears/x Physical: bfloat16[8,2048,7168]....................................... ('fsdp', None, None). I0416 13:27:30.288018 129478508436608 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint I0416 13:27:30.288126 129478508436608 checkpointing.py:581] restoring from this run's directory step 9 I0416 13:27:30.445405 129478508436608 checkpointer.py:304] Restoring checkpoint from gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_14_async_ckpt_false/checkpoints/9. I0416 13:27:30.972021 3872798 google_auth_provider.cc:149] Using credentials at ~/.config/gcloud/application_default_credentials.json I0416 13:27:30.972102 3872798 google_auth_provider.cc:156] Using OAuth2 AuthProvider I0416 13:27:36.727021 129478508436608 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/read/gbytes_per_sec: 2.072 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 5 seconds) (per-host) I0416 13:27:36.727303 129478508436608 checkpointer.py:318] Finished restoring checkpoint in 6.36 seconds from gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_14_async_ckpt_false/checkpoints/9. I0416 13:27:36.727376 129478508436608 standard_logger.py:34] {'step': 9, 'event_type': 'restore', 'directory': 'gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_14_async_ckpt_false/checkpoints', 'checkpointer_start_time': 1776346050.3640857, 'checkpointer_duration_secs': 6.3632590770721436, 'checkpoint_manager_start_time': 1776346050.288359, 'checkpoint_manager_duration_secs': 6.438987493515015} [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 13:27:37.321466 129478508436608 maxtext_utils.py:1620] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0416 13:27:37.321641 129478508436608 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 13:27:37.321683 129478508436608 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 13:27:37.321728 129478508436608 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 13:27:37.321767 129478508436608 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 13:27:37.321794 129478508436608 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 13:27:37.321832 129478508436608 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 13:27:37.321870 129478508436608 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 13:27:37.321898 129478508436608 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 13:27:37.321934 129478508436608 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 13:27:37.321971 129478508436608 maxtext_utils.py:1620] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', None) I0416 13:27:37.322005 129478508436608 maxtext_utils.py:1620] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0416 13:27:37.785645 129478508436608 train.py:155] train/xent Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length'). I0416 13:27:37.785726 129478508436608 train.py:155] train/xent Physical: float32[8,2048]............................................. ('fsdp', None). I0416 13:27:37.799369 129478508436608 train.py:162] train/z_loss Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length'). I0416 13:27:37.799419 129478508436608 train.py:162] train/z_loss Physical: float32[8,2048]............................................. ('fsdp', None). W0416 13:27:38.427073 3871218 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0416 13:27:38.492362 129478508436608 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 13:27:38.493038 129478508436608 max_utils.py:194] tensorboardX not available; using no-op SummaryWriter. I0416 13:27:38.493206 129478508436608 metric_logger.py:289] number parameters: 1.104 billion W0416 13:27:39.318852 3871218 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0416 13:27:39.388568 129478508436608 checkpointing.py:772] Waiting for step 10 to finish before checkpoint... I0416 13:27:39.505227 129478508436608 checkpointing.py:776] Waited 0.11664748191833496 seconds for step 10 to finish before starting checkpointing. I0416 13:27:39.505657 129478508436608 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0416 13:27:39.505820 129478508436608 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 10 I0416 13:27:39.505888 129478508436608 checkpointer.py:241] [process=0] Started saving checkpoint to gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_14_async_ckpt_false/checkpoints/10. I0416 13:27:39.657657 129478508436608 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_14_async_ckpt_false/checkpoints/10 I0416 13:27:40.456396 129478508436608 checkpoint.py:188] Wrote Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776346060231303839, 'commit_timestamp_nsecs': None, 'custom_metadata': {}}, json={"item_handlers": null, "metrics": {}, "performance_metrics": {}, "init_timestamp_nsecs": 1776346060231303839, "commit_timestamp_nsecs": null, "custom_metadata": {}} to gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_14_async_ckpt_false/checkpoints/10/_CHECKPOINT_METADATA I0416 13:27:40.457390 129478508436608 signaling_client.py:373] Using ThreadSafeKeyValueSignalingClient W0416 13:27:40.457717 129478508436608 future.py:328] [process=0][thread=MainThread][operation_id=1] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture. I0416 13:27:40.564517 129370836436544 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_14_async_ckpt_false/checkpoints/10/items I0416 13:27:41.100445 129478508436608 jax_array_handlers.py:347] Scheduling D2H of 39 prioritized jax.Array. I0416 13:27:41.100552 129478508436608 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 13:27:41.358709 3871218 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 13:27:41.379412 3871218 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 13:27:41.389778 3871218 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 13:27:41.394168 3871218 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 13:27:41.398297 3871218 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 13:27:41.402204 3871218 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 13:27:41.406014 3871218 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 13:27:41.409862 3871218 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0416 13:27:51.907488 129478508436608 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 10.807446s I0416 13:27:51.912112 129478508436608 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 1.133 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 10 seconds) (per-host) I0416 13:27:51.912175 129478508436608 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 10.888805s (batch_requests_ready=0.074042s, total_serialization_initiated=10.810250s, others=0.004512s) I0416 13:27:51.912248 129478508436608 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 11.454934s (all_items=0.000043s, per_item={'items': '0.00004339'}, temp_paths=11.454890) W0416 13:27:51.912284 129478508436608 future.py:328] [process=0][thread=MainThread][operation_id=1] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture. I0416 13:27:52.633290 129370846922304 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_14_async_ckpt_false/checkpoints/10/items/array_metadatas/process_0 I0416 13:28:18.253027 129371205535296 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 26.340442s (commit=25.910265s, array_metadata_write=0.430177s) I0416 13:28:18.254093 129478508436608 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 339.419 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 37 seconds) (per-host) I0416 13:28:18.872814 129478508436608 checkpoint.py:247] Updated Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776346060231303839, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} to gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_14_async_ckpt_false/checkpoints/10/_CHECKPOINT_METADATA I0416 13:28:19.011382 129478508436608 array_metadata_store.py:367] [process=0][thread=MainThread] Skipped cross-host ArrayMetadata validation because only one process is found: process_index=0. I0416 13:28:19.420729 129478508436608 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389). I0416 13:28:19.421164 129478508436608 base_pytree_checkpoint_handler.py:1342] [process=0][thread=MainThread] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.547983s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_14_async_ckpt_false/checkpoints/10/items I0416 13:28:19.421832 129478508436608 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_14_async_ckpt_false/checkpoints/10/items I0416 13:28:19.668829 129478508436608 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_14_async_ckpt_false/checkpoints/10 I0416 13:28:20.349493 129478508436608 atomicity.py:794] [process=0][thread=MainThread] Finished saving checkpoint (finalized tmp dir) to `gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_14_async_ckpt_false/checkpoints/10`. I0416 13:28:20.350155 129478508436608 checkpointer.py:290] Finished synchronous save in 40.84 seconds to gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_14_async_ckpt_false/checkpoints/10 I0416 13:28:20.350320 129478508436608 checkpoint_manager.py:2103] [process=0][thread=MainThread][step=10] CheckpointManager Save Finalize is syncing with other hosts... I0416 13:28:20.350362 129478508436608 checkpoint_manager.py:2112] [process=0][thread=MainThread][step=10] CheckpointManager Save Finalize is done on all hosts. I0416 13:28:20.350384 129478508436608 checkpoint_manager.py:1570] [process=0][thread=MainThread][step=10] Finished synchronous save. I0416 13:28:20.350416 129478508436608 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1776346059.5056427, 'wait_for_prev_duration_secs': 4.0531158447265625e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776346059.5058413, 'checkpointer_blocking_duration_secs': 40.844356060028076, 'get_old_steps_start_time': 1776346100.3502169, 'get_old_steps_duration_secs': 3.504753112792969e-05, 'checkpoint_manager_blocking_start_time': 1776346059.505541, 'checkpoint_manager_blocking_duration_secs': 40.84485650062561} I0416 13:28:20.350497 129478508436608 checkpointing.py:410] Saved a checkpoint at step 10. I0416 13:28:20.350533 129478508436608 max_utils.py:750] Memstats: After params initialized: I0416 13:28:20.350581 129478508436608 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_0(process=0,(0,0,0,0)) I0416 13:28:20.350606 129478508436608 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_1(process=0,(1,0,0,0)) I0416 13:28:20.350634 129478508436608 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_2(process=0,(0,1,0,0)) I0416 13:28:20.350653 129478508436608 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_3(process=0,(1,1,0,0)) I0416 13:28:20.350670 129478508436608 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_4(process=0,(0,2,0,0)) I0416 13:28:20.350688 129478508436608 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_5(process=0,(1,2,0,0)) I0416 13:28:20.350705 129478508436608 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_6(process=0,(0,3,0,0)) I0416 13:28:20.350722 129478508436608 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_7(process=0,(1,3,0,0)) W0416 13:28:20.356778 3871218 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 13:28:20.362856 3871218 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0416 13:28:20.367562 3871218 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0416 13:28:20.560099 129478508436608 metric_logger.py:185] completed step: 10, seconds: 0.895, TFLOP/s/device: 15.183, Tokens/s/device: 2288.616, total_weights: 16384, loss: 3.602 I0416 13:28:20.674201 129478508436608 metric_logger.py:185] completed step: 11, seconds: 41.168, TFLOP/s/device: 0.330, Tokens/s/device: 49.748, total_weights: 16384, loss: 3.101 I0416 13:28:20.792468 129478508436608 metric_logger.py:185] completed step: 12, seconds: 0.007, TFLOP/s/device: 1847.332, Tokens/s/device: 278450.034, total_weights: 16384, loss: 2.684 I0416 13:28:20.910435 129478508436608 metric_logger.py:185] completed step: 13, seconds: 0.115, TFLOP/s/device: 118.154, Tokens/s/device: 17809.470, total_weights: 16384, loss: 2.348 I0416 13:28:20.914995 129478508436608 checkpointing.py:772] Waiting for step 15 to finish before checkpoint... I0416 13:28:21.146227 129478508436608 checkpointing.py:776] Waited 0.2312009334564209 seconds for step 15 to finish before starting checkpointing. I0416 13:28:21.146594 129478508436608 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0416 13:28:21.146744 129478508436608 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 15 I0416 13:28:21.146812 129478508436608 checkpointer.py:241] [process=0] Started saving checkpoint to gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_14_async_ckpt_false/checkpoints/15. I0416 13:28:21.314945 129478508436608 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_14_async_ckpt_false/checkpoints/15 W0416 13:28:22.127539 129478508436608 future.py:328] [process=0][thread=MainThread][operation_id=2] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture. I0416 13:28:22.216990 129371205535296 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_14_async_ckpt_false/checkpoints/15/items I0416 13:28:22.740781 129478508436608 jax_array_handlers.py:347] Scheduling D2H of 39 prioritized jax.Array. I0416 13:28:22.740882 129478508436608 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 13:28:24.744705 129478508436608 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 2.004254s I0416 13:28:24.745188 129478508436608 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 5.901 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 2 seconds) (per-host) I0416 13:28:24.745242 129478508436608 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 2.091436s (batch_requests_ready=0.083691s, total_serialization_initiated=2.007369s, others=0.000377s) I0416 13:28:24.745307 129478508436608 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 2.618069s (all_items=0.000022s, per_item={'items': '0.00002170'}, temp_paths=2.618047) W0416 13:28:24.745338 129478508436608 future.py:328] [process=0][thread=MainThread][operation_id=2] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture. I0416 13:28:25.501425 129370836436544 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_14_async_ckpt_false/checkpoints/15/items/array_metadatas/process_0 I0416 13:28:51.691373 129371184563776 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 26.942192s (commit=26.472748s, array_metadata_write=0.469444s) I0416 13:28:51.692457 129478508436608 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 435.172 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 29 seconds) (per-host) I0416 13:28:52.417227 129478508436608 array_metadata_store.py:367] [process=0][thread=MainThread] Skipped cross-host ArrayMetadata validation because only one process is found: process_index=0. I0416 13:28:52.862342 129478508436608 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389). I0416 13:28:52.862499 129478508436608 base_pytree_checkpoint_handler.py:1342] [process=0][thread=MainThread] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.585057s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_14_async_ckpt_false/checkpoints/15/items I0416 13:28:52.863156 129478508436608 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_14_async_ckpt_false/checkpoints/15/items I0416 13:28:53.111248 129478508436608 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_14_async_ckpt_false/checkpoints/15 I0416 13:28:53.734385 129478508436608 atomicity.py:794] [process=0][thread=MainThread] Finished saving checkpoint (finalized tmp dir) to `gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_14_async_ckpt_false/checkpoints/15`. I0416 13:28:53.735021 129478508436608 checkpointer.py:290] Finished synchronous save in 32.59 seconds to gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_14_async_ckpt_false/checkpoints/15 I0416 13:28:53.735225 129478508436608 checkpoint_manager.py:2103] [process=0][thread=MainThread][step=15] CheckpointManager Save Finalize is syncing with other hosts... I0416 13:28:53.735271 129478508436608 checkpoint_manager.py:2112] [process=0][thread=MainThread][step=15] CheckpointManager Save Finalize is done on all hosts. I0416 13:28:53.735296 129478508436608 checkpoint_manager.py:1570] [process=0][thread=MainThread][step=15] Finished synchronous save. I0416 13:28:53.735331 129478508436608 standard_logger.py:34] {'step': 15, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1776346101.146576, 'wait_for_prev_duration_secs': 4.982948303222656e-05, 'time_between_consecutive_saves_sec': 0.7961995601654053, 'checkpointer_blocking_start_time': 1776346101.1467652, 'checkpointer_blocking_duration_secs': 32.58832144737244, 'get_old_steps_start_time': 1776346133.7351134, 'get_old_steps_duration_secs': 4.00543212890625e-05, 'checkpoint_manager_blocking_start_time': 1776346101.1465113, 'checkpoint_manager_blocking_duration_secs': 32.58879828453064} I0416 13:28:53.735429 129478508436608 checkpointing.py:410] Saved a checkpoint at step 15. I0416 13:28:53.736335 129478508436608 metric_logger.py:185] completed step: 14, seconds: 0.118, TFLOP/s/device: 115.081, Tokens/s/device: 17346.230, total_weights: 16384, loss: 2.083 I0416 13:28:53.747665 129478508436608 metric_logger.py:185] completed step: 15, seconds: 0.118, TFLOP/s/device: 115.083, Tokens/s/device: 17346.524, total_weights: 16384, loss: 1.880 I0416 13:28:53.860446 129478508436608 metric_logger.py:185] completed step: 16, seconds: 32.828, TFLOP/s/device: 0.414, Tokens/s/device: 62.385, total_weights: 16384, loss: 1.726 I0416 13:28:53.978830 129478508436608 metric_logger.py:185] completed step: 17, seconds: 0.008, TFLOP/s/device: 1692.889, Tokens/s/device: 255170.695, total_weights: 16384, loss: 1.610 I0416 13:28:54.096978 129478508436608 metric_logger.py:185] completed step: 18, seconds: 0.114, TFLOP/s/device: 119.190, Tokens/s/device: 17965.543, total_weights: 16384, loss: 1.521 I0416 13:28:54.214930 129478508436608 checkpointing.py:772] Waiting for step 19 to finish before checkpoint... I0416 13:28:54.215802 129478508436608 checkpointing.py:776] Waited 0.0009007453918457031 seconds for step 19 to finish before starting checkpointing. I0416 13:28:54.216033 129478508436608 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0416 13:28:54.216190 129478508436608 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 19 I0416 13:28:54.216246 129478508436608 checkpointer.py:241] [process=0] Started saving checkpoint to gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_14_async_ckpt_false/checkpoints/19. I0416 13:28:54.395096 129478508436608 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_14_async_ckpt_false/checkpoints/19 W0416 13:28:55.218000 129478508436608 future.py:328] [process=0][thread=MainThread][operation_id=3] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture. I0416 13:28:55.302458 129371205535296 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_14_async_ckpt_false/checkpoints/19/items I0416 13:28:55.830502 129478508436608 jax_array_handlers.py:347] Scheduling D2H of 39 prioritized jax.Array. I0416 13:28:55.830607 129478508436608 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 13:29:00.357555 129478508436608 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 4.527406s I0416 13:29:00.361625 129478508436608 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.672 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 4 seconds) (per-host) I0416 13:29:00.361682 129478508436608 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 4.618655s (batch_requests_ready=0.084177s, total_serialization_initiated=4.530528s, others=0.003950s) I0416 13:29:00.361751 129478508436608 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 5.144063s (all_items=0.000023s, per_item={'items': '0.00002265'}, temp_paths=5.144040) W0416 13:29:00.361782 129478508436608 future.py:328] [process=0][thread=MainThread][operation_id=3] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture. I0416 13:29:01.110144 129371184563776 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_14_async_ckpt_false/checkpoints/19/items/array_metadatas/process_0 I0416 13:29:31.455579 129372358968896 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 31.093452s (commit=30.645267s, array_metadata_write=0.448185s) I0416 13:29:31.456922 129478508436608 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 353.834 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 35 seconds) (per-host) I0416 13:29:32.184534 129478508436608 array_metadata_store.py:367] [process=0][thread=MainThread] Skipped cross-host ArrayMetadata validation because only one process is found: process_index=0. I0416 13:29:32.589370 129478508436608 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389). I0416 13:29:32.589531 129478508436608 base_pytree_checkpoint_handler.py:1342] [process=0][thread=MainThread] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.541513s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_14_async_ckpt_false/checkpoints/19/items I0416 13:29:32.590185 129478508436608 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_14_async_ckpt_false/checkpoints/19/items I0416 13:29:32.905860 129478508436608 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_14_async_ckpt_false/checkpoints/19 I0416 13:29:33.710348 129478508436608 atomicity.py:794] [process=0][thread=MainThread] Finished saving checkpoint (finalized tmp dir) to `gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_14_async_ckpt_false/checkpoints/19`. I0416 13:29:33.711002 129478508436608 checkpointer.py:290] Finished synchronous save in 39.49 seconds to gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_14_async_ckpt_false/checkpoints/19 I0416 13:29:33.711177 129478508436608 checkpoint_manager.py:2103] [process=0][thread=MainThread][step=19] CheckpointManager Save Finalize is syncing with other hosts... I0416 13:29:33.711217 129478508436608 checkpoint_manager.py:2112] [process=0][thread=MainThread][step=19] CheckpointManager Save Finalize is done on all hosts. I0416 13:29:33.711241 129478508436608 checkpoint_manager.py:1570] [process=0][thread=MainThread][step=19] Finished synchronous save. I0416 13:29:33.711277 129478508436608 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/linen_ckpt_main_20260416_123638/linen_main_20260416_123638_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1776346134.2160127, 'wait_for_prev_duration_secs': 5.984306335449219e-05, 'time_between_consecutive_saves_sec': 0.4807267189025879, 'checkpointer_blocking_start_time': 1776346134.2162108, 'checkpointer_blocking_duration_secs': 39.49485397338867, 'get_old_steps_start_time': 1776346173.7110891, 'get_old_steps_duration_secs': 2.6702880859375e-05, 'checkpoint_manager_blocking_start_time': 1776346134.21598, 'checkpoint_manager_blocking_duration_secs': 39.495274782180786} I0416 13:29:33.711397 129478508436608 checkpointing.py:410] Saved a checkpoint at step 19. I0416 13:29:33.711426 129478508436608 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0416 13:29:33.711448 129478508436608 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0416 13:29:33.715556 129478508436608 metric_logger.py:185] completed step: 19, seconds: 0.118, TFLOP/s/device: 114.992, Tokens/s/device: 17332.871, 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