2026-04-15 21:57:11.739230: 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)
I0415 21:57:11.856290 131993809726592 max_utils.py:238] Skipping jax distributed system due to skip_jax_distributed_system=True flag.
I0415 21:57:56.856376 131993809726592 max_utils.py:800] System Information: Jax Version: 0.9.2
I0415 21:57:56.856489 131993809726592 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0415 21:57:56.856523 131993809726592 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
I0415 21:57:56.856559 131993809726592 train_utils.py:334] WARNING: 'dataset_path' might be pointing your local file system
I0415 21:57:56.856583 131993809726592 train_utils.py:347] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0415 21:57:56.856690 131993809726592 train.py:683] [DECOUPLED NO-OP] skipping cloud diagnostics wrapper.
W0415 21:57:56.948543 3275529 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions.
I0415 21:57:57.346002 131993809726592 maxtext_utils.py:1517] Num_devices: 8, shape (1, 1, 1, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0415 21:57:57.346321 131993809726592 checkpointing.py:677] Setting up checkpoint logger...
I0415 21:57:57.346365 131993809726592 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True
I0415 21:57:57.346410 131993809726592 pytree_checkpoint_handler.py:577] save_device_host_concurrent_bytes=None
I0415 21:57:57.346931 131993809726592 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 0x780b9c903b00>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0415 21:57:59.002804 131993809726592 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0415 21:57:59.002992 131993809726592 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 0x78052239f620>}, handler_registry=None
I0415 21:57:59.003274 131993809726592 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x78052239f620>` 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`.
I0415 21:57:59.003317 131993809726592 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x78052113a2d0>` 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`.
I0415 21:57:59.003347 131993809726592 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 0x78052239f620>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x78052239f620>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x78052113a2d0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x78052113a2d0>}).
I0415 21:57:59.003653 131993809726592 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.28
I0415 21:57:59.386978 131887706146368 checkpoint.py:228] Read Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776290092648198647, 'commit_timestamp_nsecs': 1776290127897450198, 'custom_metadata': {}} from gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints/0/_CHECKPOINT_METADATA
I0415 21:57:59.471681 131887706146368 checkpoint_manager.py:1847] Missing metrics for step 0
I0415 21:57:59.565236 131993809726592 checkpoint_manager.py:1788] Found 3 checkpoint steps in gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints
I0415 21:57:59.565745 131993809726592 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_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x780521139cd0>
I0415 21:57:59.565831 131993809726592 checkpointing.py:301] Checkpoint manager created!
W0415 21:57:59.582573 3275529 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions.
I0415 21:57:59.764981 131993809726592 nnx_wrappers.py:437] Unknown Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0415 21:57:59.765101 131993809726592 nnx_wrappers.py:437] Unknown Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None).
I0415 21:57:59.854565 131993809726592 attentions.py:1088] attentions/inputs_q Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0415 21:57:59.854645 131993809726592 attentions.py:1088] attentions/inputs_q Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None).
I0415 21:57:59.868992 131993809726592 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0415 21:57:59.869039 131993809726592 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None).
I0415 21:57:59.889507 131993809726592 attentions.py:1154] attentions/query Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0415 21:57:59.889566 131993809726592 attentions.py:1154] attentions/query Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None).
I0415 21:57:59.903906 131993809726592 attentions.py:1155] attentions/key Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0415 21:57:59.903954 131993809726592 attentions.py:1155] attentions/key Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None).
I0415 21:57:59.918211 131993809726592 attentions.py:1156] attentions/value Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0415 21:57:59.918261 131993809726592 attentions.py:1156] attentions/value Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None).
I0415 21:57:59.939906 131993809726592 attentions.py:1197] attentions/out Logical: bfloat16[8,2048,16,128]..................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0415 21:57:59.939963 131993809726592 attentions.py:1197] attentions/out Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None).
I0415 21:57:59.958338 131993809726592 linears.py:525] linears/x Logical: bfloat16[8,2048,7168]....................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0415 21:57:59.958389 131993809726592 linears.py:525] linears/x Physical: bfloat16[8,2048,7168]....................................... ('fsdp', None, None).
I0415 21:58:00.142020 131993809726592 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0415 21:58:00.142201 131993809726592 checkpointing.py:581] restoring from this run's directory step 9
I0415 21:58:00.305421 131993809726592 checkpointer.py:304] Restoring checkpoint from gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints/9.
I0415 21:58:00.855263 3277122 google_auth_provider.cc:149] Using credentials at ~/.config/gcloud/application_default_credentials.json
I0415 21:58:00.855327 3277122 google_auth_provider.cc:156] Using OAuth2 AuthProvider
I0415 21:58:07.420892 131993809726592 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/read/gbytes_per_sec: 1.823 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 6 seconds) (per-host)
I0415 21:58:07.421162 131993809726592 checkpointer.py:318] Finished restoring checkpoint in 7.20 seconds from gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints/9.
I0415 21:58:07.421234 131993809726592 standard_logger.py:34] {'step': 9, 'event_type': 'restore', 'directory': 'gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints', 'checkpointer_start_time': 1776290280.2229471, 'checkpointer_duration_secs': 7.198258876800537, 'checkpoint_manager_start_time': 1776290280.1424315, 'checkpoint_manager_duration_secs': 7.278776407241821}
[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
I0415 21:58:07.795490 131993809726592 maxtext_utils.py:1620] params/params/decoder/decoder_norm/scale
Shape: float32[2048]
Logical: P('norm',)
Physical: (None,)
I0415 21:58:07.795594 131993809726592 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)
I0415 21:58:07.795634 131993809726592 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)
I0415 21:58:07.795677 131993809726592 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')
I0415 21:58:07.795716 131993809726592 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)
I0415 21:58:07.795743 131993809726592 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)
I0415 21:58:07.795781 131993809726592 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)
I0415 21:58:07.795820 131993809726592 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')
I0415 21:58:07.795847 131993809726592 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)
I0415 21:58:07.795875 131993809726592 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)
I0415 21:58:07.795918 131993809726592 maxtext_utils.py:1620] params/params/decoder/logits_dense/kernel
Shape: float32[2048,32000]
Logical: P('embed_vocab', 'vocab')
Physical: ('fsdp', None)
I0415 21:58:07.795954 131993809726592 maxtext_utils.py:1620] params/params/token_embedder/embedding
Shape: float32[32000,2048]
Logical: P('vocab', 'embed_vocab')
Physical: (None, 'fsdp')
I0415 21:58:08.215910 131993809726592 train.py:155] train/xent Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length').
I0415 21:58:08.215992 131993809726592 train.py:155] train/xent Physical: float32[8,2048]............................................. ('fsdp', None).
I0415 21:58:08.229661 131993809726592 train.py:162] train/z_loss Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length').
I0415 21:58:08.229712 131993809726592 train.py:162] train/z_loss Physical: float32[8,2048]............................................. ('fsdp', None).
W0415 21:58:08.866636 3275529 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions.
I0415 21:58:08.929831 131993809726592 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.
I0415 21:58:08.930559 131993809726592 max_utils.py:194] tensorboardX not available; using no-op SummaryWriter.
I0415 21:58:08.930712 131993809726592 metric_logger.py:289] number parameters: 1.104 billion
W0415 21:58:09.746987 3275529 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions.
I0415 21:58:09.816917 131993809726592 checkpointing.py:772] Waiting for step 10 to finish before checkpoint...
I0415 21:58:09.933501 131993809726592 checkpointing.py:776] Waited 0.11657452583312988 seconds for step 10 to finish before starting checkpointing.
I0415 21:58:09.933900 131993809726592 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0415 21:58:09.934099 131993809726592 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 10
I0415 21:58:09.934165 131993809726592 checkpointer.py:241] [process=0] Started saving checkpoint to gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints/10.
I0415 21:58:10.092360 131993809726592 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints/10
I0415 21:58:10.879230 131993809726592 checkpoint.py:188] Wrote Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776290290643437069, 'commit_timestamp_nsecs': None, 'custom_metadata': {}}, json={"item_handlers": null, "metrics": {}, "performance_metrics": {}, "init_timestamp_nsecs": 1776290290643437069, "commit_timestamp_nsecs": null, "custom_metadata": {}} to gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints/10/_CHECKPOINT_METADATA
I0415 21:58:10.880146 131993809726592 signaling_client.py:373] Using ThreadSafeKeyValueSignalingClient
W0415 21:58:10.880456 131993809726592 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.
I0415 21:58:10.967469 131886198294080 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints/10/items
I0415 21:58:11.495870 131993809726592 jax_array_handlers.py:347] Scheduling D2H of 39 prioritized jax.Array.
I0415 21:58:11.495976 131993809726592 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
W0415 21:58:11.729396 3275529 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions.
W0415 21:58:11.759497 3275529 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions.
W0415 21:58:11.764769 3275529 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions.
W0415 21:58:11.769112 3275529 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions.
W0415 21:58:11.773274 3275529 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions.
W0415 21:58:11.777228 3275529 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions.
W0415 21:58:11.781127 3275529 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions.
W0415 21:58:11.785004 3275529 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions.
I0415 21:58:16.426450 131993809726592 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 4.930941s
I0415 21:58:16.430808 131993809726592 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.457 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 5 seconds) (per-host)
I0415 21:58:16.430873 131993809726592 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 5.023098s (batch_requests_ready=0.085109s, total_serialization_initiated=4.933730s, others=0.004260s)
I0415 21:58:16.430949 131993809726592 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 5.550868s (all_items=0.000029s, per_item={'items': '0.00002933'}, temp_paths=5.550839)
W0415 21:58:16.430985 131993809726592 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.
I0415 21:58:17.180000 131886208779840 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints/10/items/array_metadatas/process_0
I0415 21:58:48.194980 131886573684288 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 31.763762s (commit=31.299990s, array_metadata_write=0.463772s)
I0415 21:58:48.196084 131993809726592 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 343.501 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 36 seconds) (per-host)
I0415 21:58:48.842190 131993809726592 checkpoint.py:247] Updated Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776290290643437069, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} to gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints/10/_CHECKPOINT_METADATA
I0415 21:58:48.982028 131993809726592 array_metadata_store.py:367] [process=0][thread=MainThread] Skipped cross-host ArrayMetadata validation because only one process is found: process_index=0.
I0415 21:58:49.395003 131993809726592 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389).
I0415 21:58:49.395188 131993809726592 base_pytree_checkpoint_handler.py:1342] [process=0][thread=MainThread] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.552620s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints/10/items
I0415 21:58:49.395869 131993809726592 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints/10/items
I0415 21:58:49.640710 131993809726592 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints/10
I0415 21:58:50.301972 131993809726592 atomicity.py:794] [process=0][thread=MainThread] Finished saving checkpoint (finalized tmp dir) to `gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints/10`.
I0415 21:58:50.302628 131993809726592 checkpointer.py:290] Finished synchronous save in 40.37 seconds to gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints/10
I0415 21:58:50.302825 131993809726592 checkpoint_manager.py:2103] [process=0][thread=MainThread][step=10] CheckpointManager Save Finalize is syncing with other hosts...
I0415 21:58:50.302881 131993809726592 checkpoint_manager.py:2112] [process=0][thread=MainThread][step=10] CheckpointManager Save Finalize is done on all hosts.
I0415 21:58:50.302906 131993809726592 checkpoint_manager.py:1570] [process=0][thread=MainThread][step=10] Finished synchronous save.
I0415 21:58:50.302944 131993809726592 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1776290289.9338877, 'wait_for_prev_duration_secs': 3.981590270996094e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776290289.934122, 'checkpointer_blocking_duration_secs': 40.36855459213257, 'get_old_steps_start_time': 1776290330.302705, 'get_old_steps_duration_secs': 3.790855407714844e-05, 'checkpoint_manager_blocking_start_time': 1776290289.9338043, 'checkpoint_manager_blocking_duration_secs': 40.36911678314209}
I0415 21:58:50.303068 131993809726592 checkpointing.py:410] Saved a checkpoint at step 10.
I0415 21:58:50.303111 131993809726592 max_utils.py:750]
Memstats: After params initialized:
I0415 21:58:50.303167 131993809726592 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_0(process=0,(0,0,0,0))
I0415 21:58:50.303192 131993809726592 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_1(process=0,(1,0,0,0))
I0415 21:58:50.303213 131993809726592 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_2(process=0,(0,1,0,0))
I0415 21:58:50.303232 131993809726592 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_3(process=0,(1,1,0,0))
I0415 21:58:50.303251 131993809726592 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_4(process=0,(0,2,0,0))
I0415 21:58:50.303269 131993809726592 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_5(process=0,(1,2,0,0))
I0415 21:58:50.303287 131993809726592 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_6(process=0,(0,3,0,0))
I0415 21:58:50.303304 131993809726592 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_7(process=0,(1,3,0,0))
W0415 21:58:50.309797 3275529 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions.
W0415 21:58:50.315920 3275529 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions.
W0415 21:58:50.320649 3275529 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions.
I0415 21:58:50.515680 131993809726592 metric_logger.py:185] completed step: 10, seconds: 0.886, TFLOP/s/device: 15.341, Tokens/s/device: 2312.311, total_weights: 16384, loss: 3.602
I0415 21:58:50.629705 131993809726592 metric_logger.py:185] completed step: 11, seconds: 40.695, TFLOP/s/device: 0.334, Tokens/s/device: 50.325, total_weights: 16384, loss: 3.101
I0415 21:58:50.747831 131993809726592 metric_logger.py:185] completed step: 12, seconds: 0.007, TFLOP/s/device: 1919.086, Tokens/s/device: 289265.537, total_weights: 16384, loss: 2.684
I0415 21:58:50.865785 131993809726592 metric_logger.py:185] completed step: 13, seconds: 0.115, TFLOP/s/device: 118.553, Tokens/s/device: 17869.608, total_weights: 16384, loss: 2.348
I0415 21:58:50.870487 131993809726592 checkpointing.py:772] Waiting for step 15 to finish before checkpoint...
I0415 21:58:51.102278 131993809726592 checkpointing.py:776] Waited 0.2317638397216797 seconds for step 15 to finish before starting checkpointing.
I0415 21:58:51.102660 131993809726592 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0415 21:58:51.102807 131993809726592 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 15
I0415 21:58:51.102867 131993809726592 checkpointer.py:241] [process=0] Started saving checkpoint to gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints/15.
I0415 21:58:51.283343 131993809726592 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints/15
W0415 21:58:52.121914 131993809726592 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.
I0415 21:58:52.203243 131886573684288 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints/15/items
I0415 21:58:52.756185 131993809726592 jax_array_handlers.py:347] Scheduling D2H of 39 prioritized jax.Array.
I0415 21:58:52.756293 131993809726592 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
I0415 21:58:55.488718 131993809726592 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 2.732868s
I0415 21:58:55.492771 131993809726592 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 4.383 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 2 seconds) (per-host)
I0415 21:58:55.492830 131993809726592 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 2.815740s (batch_requests_ready=0.075772s, total_serialization_initiated=2.736027s, others=0.003941s)
I0415 21:58:55.492898 131993809726592 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 3.371320s (all_items=0.000030s, per_item={'items': '0.00003028'}, temp_paths=3.371289)
W0415 21:58:55.492930 131993809726592 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.
I0415 21:58:56.253896 131886198294080 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints/15/items/array_metadatas/process_0
I0415 21:59:25.679255 131886552712768 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 30.185982s (commit=29.777135s, array_metadata_write=0.408848s)
I0415 21:59:25.680318 131993809726592 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 382.896 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 33 seconds) (per-host)
I0415 21:59:26.418927 131993809726592 array_metadata_store.py:367] [process=0][thread=MainThread] Skipped cross-host ArrayMetadata validation because only one process is found: process_index=0.
I0415 21:59:26.832029 131993809726592 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389).
I0415 21:59:26.832461 131993809726592 base_pytree_checkpoint_handler.py:1342] [process=0][thread=MainThread] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.551964s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints/15/items
I0415 21:59:26.833131 131993809726592 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints/15/items
I0415 21:59:27.069664 131993809726592 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints/15
I0415 21:59:27.751036 131993809726592 atomicity.py:794] [process=0][thread=MainThread] Finished saving checkpoint (finalized tmp dir) to `gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints/15`.
I0415 21:59:27.751713 131993809726592 checkpointer.py:290] Finished synchronous save in 36.65 seconds to gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints/15
I0415 21:59:27.751889 131993809726592 checkpoint_manager.py:2103] [process=0][thread=MainThread][step=15] CheckpointManager Save Finalize is syncing with other hosts...
I0415 21:59:27.751934 131993809726592 checkpoint_manager.py:2112] [process=0][thread=MainThread][step=15] CheckpointManager Save Finalize is done on all hosts.
I0415 21:59:27.751958 131993809726592 checkpoint_manager.py:1570] [process=0][thread=MainThread][step=15] Finished synchronous save.
I0415 21:59:27.751998 131993809726592 standard_logger.py:34] {'step': 15, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1776290331.1026332, 'wait_for_prev_duration_secs': 5.245208740234375e-05, 'time_between_consecutive_saves_sec': 0.7997355461120605, 'checkpointer_blocking_start_time': 1776290331.1028266, 'checkpointer_blocking_duration_secs': 36.648937940597534, 'get_old_steps_start_time': 1776290367.751795, 'get_old_steps_duration_secs': 3.266334533691406e-05, 'checkpoint_manager_blocking_start_time': 1776290331.1025627, 'checkpoint_manager_blocking_duration_secs': 36.64941048622131}
I0415 21:59:27.752121 131993809726592 checkpointing.py:410] Saved a checkpoint at step 15.
I0415 21:59:27.752944 131993809726592 metric_logger.py:185] completed step: 14, seconds: 0.118, TFLOP/s/device: 114.871, Tokens/s/device: 17314.553, total_weights: 16384, loss: 2.083
I0415 21:59:27.765092 131993809726592 metric_logger.py:185] completed step: 15, seconds: 0.118, TFLOP/s/device: 115.139, Tokens/s/device: 17355.050, total_weights: 16384, loss: 1.880
I0415 21:59:27.877573 131993809726592 metric_logger.py:185] completed step: 16, seconds: 36.890, TFLOP/s/device: 0.368, Tokens/s/device: 55.517, total_weights: 16384, loss: 1.726
I0415 21:59:27.996573 131993809726592 metric_logger.py:185] completed step: 17, seconds: 0.008, TFLOP/s/device: 1616.553, Tokens/s/device: 243664.485, total_weights: 16384, loss: 1.610
I0415 21:59:28.114763 131993809726592 metric_logger.py:185] completed step: 18, seconds: 0.114, TFLOP/s/device: 119.657, Tokens/s/device: 18035.949, total_weights: 16384, loss: 1.521
I0415 21:59:28.232842 131993809726592 checkpointing.py:772] Waiting for step 19 to finish before checkpoint...
I0415 21:59:28.233614 131993809726592 checkpointing.py:776] Waited 0.0007996559143066406 seconds for step 19 to finish before starting checkpointing.
I0415 21:59:28.233854 131993809726592 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0415 21:59:28.233996 131993809726592 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 19
I0415 21:59:28.234077 131993809726592 checkpointer.py:241] [process=0] Started saving checkpoint to gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints/19.
I0415 21:59:28.404707 131993809726592 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints/19
W0415 21:59:29.225137 131993809726592 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.
I0415 21:59:29.313645 131886573684288 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints/19/items
I0415 21:59:29.859277 131993809726592 jax_array_handlers.py:347] Scheduling D2H of 39 prioritized jax.Array.
I0415 21:59:29.859386 131993809726592 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
I0415 21:59:30.988761 131993809726592 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 1.129838s
I0415 21:59:30.992779 131993809726592 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 10.047 GiB/s (total gbytes: 12.3 GiB) (time elapsed: a second) (per-host)
I0415 21:59:30.992837 131993809726592 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 1.228438s (batch_requests_ready=0.091685s, total_serialization_initiated=1.132841s, others=0.003912s)
I0415 21:59:30.992911 131993809726592 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.768115s (all_items=0.000027s, per_item={'items': '0.00002742'}, temp_paths=1.768088)
W0415 21:59:30.992943 131993809726592 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.
I0415 21:59:31.783295 131886552712768 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints/19/items/array_metadatas/process_0
I0415 22:00:05.505312 131887653717568 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 34.512007s (commit=34.025522s, array_metadata_write=0.486485s)
I0415 22:00:05.506546 131993809726592 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 353.555 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 35 seconds) (per-host)
I0415 22:00:06.264228 131993809726592 array_metadata_store.py:367] [process=0][thread=MainThread] Skipped cross-host ArrayMetadata validation because only one process is found: process_index=0.
I0415 22:00:06.738245 131993809726592 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389).
I0415 22:00:06.738450 131993809726592 base_pytree_checkpoint_handler.py:1342] [process=0][thread=MainThread] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.613410s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints/19/items
I0415 22:00:06.739136 131993809726592 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints/19/items
I0415 22:00:06.977102 131993809726592 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints/19
I0415 22:00:07.680433 131993809726592 atomicity.py:794] [process=0][thread=MainThread] Finished saving checkpoint (finalized tmp dir) to `gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints/19`.
I0415 22:00:07.681078 131993809726592 checkpointer.py:290] Finished synchronous save in 39.45 seconds to gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints/19
I0415 22:00:07.681226 131993809726592 checkpoint_manager.py:2103] [process=0][thread=MainThread][step=19] CheckpointManager Save Finalize is syncing with other hosts...
I0415 22:00:07.681267 131993809726592 checkpoint_manager.py:2112] [process=0][thread=MainThread][step=19] CheckpointManager Save Finalize is done on all hosts.
I0415 22:00:07.681291 131993809726592 checkpoint_manager.py:1570] [process=0][thread=MainThread][step=19] Finished synchronous save.
I0415 22:00:07.681326 131993809726592 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/linen_ckpt_main_20260415_211126/linen_main_20260415_211126_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1776290368.233834, 'wait_for_prev_duration_secs': 4.315376281738281e-05, 'time_between_consecutive_saves_sec': 0.4818856716156006, 'checkpointer_blocking_start_time': 1776290368.2340157, 'checkpointer_blocking_duration_secs': 39.4471070766449, 'get_old_steps_start_time': 1776290407.6811452, 'get_old_steps_duration_secs': 2.574920654296875e-05, 'checkpoint_manager_blocking_start_time': 1776290368.233801, 'checkpoint_manager_blocking_duration_secs': 39.4475040435791}
I0415 22:00:07.681412 131993809726592 checkpointing.py:410] Saved a checkpoint at step 19.
I0415 22:00:07.681437 131993809726592 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0415 22:00:07.681457 131993809726592 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0415 22:00:07.682186 131993809726592 metric_logger.py:185] completed step: 19, seconds: 0.119, TFLOP/s/device: 114.421, Tokens/s/device: 17246.751, 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