XPK Start: Fri Apr 17 14:24:57 UTC 2026
PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used.
2026-04-17 14:25:20.772093: 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)
I0417 14:25:20.952640 134857668777792 max_utils.py:273] Attempting to initialize the jax distributed system...
I0417 14:25:29.993879 134857668777792 distributed.py:149] Starting JAX distributed service on [::]:8482
I0417 14:25:29.996400 134857668777792 distributed.py:172] Connecting to JAX distributed service on mt-14-async-ckpt-false--x6h3d-slice-job-0-0.mt-14-async-ckpt-false--x6h3d:8482
I0417 14:25:31.576243 134857668777792 max_utils.py:284] Jax distributed system initialized!
I0417 14:25:37.503213 134857668777792 max_utils.py:800] System Information: Jax Version: 0.9.2
I0417 14:25:37.503315 134857668777792 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0417 14:25:37.503354 134857668777792 max_utils.py:802] System Information: Jax Backend: PJRT C API
TFRT TPU v6 lite
Built on Mar 4 2026 11:32:08 (1772652728) cl/878335365
I0417 14:25:37.503388 134857668777792 train_utils.py:348] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0417 14:25:38.527050 134857668777792 maxtext_utils.py:1548] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0417 14:25:38.527320 134857668777792 checkpointing.py:677] Setting up checkpoint logger...
I0417 14:25:38.527373 134857668777792 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True
I0417 14:25:38.527417 134857668777792 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0417 14:25:38.527751 134857668777792 base_pytree_checkpoint_handler.py:441] 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 0x7aa647a510a0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0417 14:25:39.857447 134857668777792 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0417 14:25:39.857677 134857668777792 checkpoint_manager.py:708] [process=0][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7aa53bd7d850>}, handler_registry=None
I0417 14:25:39.857939 134857668777792 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7aa53bd7d850>` 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`.
I0417 14:25:39.857990 134857668777792 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7aa53bd5bc50>` 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`.
I0417 14:25:39.858026 134857668777792 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 0x7aa53bd7d850>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7aa53bd7d850>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7aa53bd5bc50>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7aa53bd5bc50>}).
I0417 14:25:39.858346 134857668777792 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0417 14:25:42.826460 134736253011712 checkpoint.py:228] Read Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776435635746690694, 'commit_timestamp_nsecs': 1776435680013167651, 'custom_metadata': {}} from gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/0/_CHECKPOINT_METADATA
I0417 14:25:43.082729 134736253011712 checkpoint_manager.py:1871] Missing metrics for step 0
I0417 14:25:43.682647 134857668777792 checkpoint_manager.py:1812] Found 3 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints
I0417 14:25:43.869997 134857668777792 checkpoint_manager.py:929] [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_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, lightweight_initialize=False), root_directory=gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7aa53bd6b620>
I0417 14:25:43.870169 134857668777792 checkpointing.py:301] Checkpoint manager created!
I0417 14:25:44.802617 134857668777792 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0417 14:25:44.802731 134857668777792 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0417 14:25:45.181805 134857668777792 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0417 14:25:45.181915 134857668777792 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0417 14:25:45.198254 134857668777792 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0417 14:25:45.198316 134857668777792 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0417 14:25:45.222126 134857668777792 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0417 14:25:45.222190 134857668777792 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0417 14:25:45.238693 134857668777792 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0417 14:25:45.238751 134857668777792 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0417 14:25:45.255216 134857668777792 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0417 14:25:45.255279 134857668777792 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0417 14:25:45.279921 134857668777792 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0417 14:25:45.279994 134857668777792 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0417 14:25:45.301875 134857668777792 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0417 14:25:45.301936 134857668777792 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0417 14:25:45.518085 134857668777792 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0417 14:25:45.518191 134857668777792 checkpointing.py:581] restoring from this run's directory step 9
I0417 14:25:45.759940 134857668777792 event_tracking.py:70] [process=0] [sync] Started load checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/9.
I0417 14:25:46.003024 134857668777792 checkpointer.py:307] Restoring checkpoint from gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/9.
I0417 14:25:46.003453 134857668777792 event_tracking.py:125] [process=0] [sync] Finished blocking load in 0.24 seconds. Continuing load @ gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/9.
I0417 14:25:47.419141 1455 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0417 14:25:53.888919 134857668777792 jax_array_handlers.py:843] [process=0] /jax/orbax/read/worker/io/requested throughput: 244.026 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 6.475831031799316 s) (per-host)
I0417 14:25:53.894865 134857668777792 base_pytree_checkpoint_handler.py:130] [process=0] /jax/checkpoint/read/gbytes_per_sec: 229.122 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 6.907197952270508 s) (per-host)
I0417 14:25:55.629788 134857668777792 event_tracking.py:138] [process=0] [sync] Finished load in 9.87 seconds @ gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/9
I0417 14:25:55.629989 134857668777792 standard_logger.py:34] {'step': 9, 'event_type': 'restore', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints', 'checkpointer_start_time': 1776435945.7598588, 'checkpointer_duration_secs': 9.870098352432251, 'checkpoint_manager_start_time': 1776435945.518431, 'checkpoint_manager_duration_secs': 10.111528635025024}
fsdp: 32
I0417 14:25:56.047658 134857668777792 maxtext_utils.py:1651] params/params/decoder/decoder_norm/scale
Shape: float32[2048]
Logical: P('norm',)
Physical: (None,)
I0417 14:25:56.047777 134857668777792 maxtext_utils.py:1651] params/params/decoder/layers/mlp/wi_0/kernel
Shape: float32[2048,16,7168]
Logical: P('embed', 'layers', 'mlp')
Physical: ('fsdp', None, None)
I0417 14:25:56.047847 134857668777792 maxtext_utils.py:1651] params/params/decoder/layers/mlp/wi_1/kernel
Shape: float32[2048,16,7168]
Logical: P('embed', 'layers', 'mlp')
Physical: ('fsdp', None, None)
I0417 14:25:56.047911 134857668777792 maxtext_utils.py:1651] params/params/decoder/layers/mlp/wo/kernel
Shape: float32[7168,16,2048]
Logical: P('mlp', 'layers', 'embed')
Physical: (None, None, 'fsdp')
I0417 14:25:56.047963 134857668777792 maxtext_utils.py:1651] params/params/decoder/layers/post_self_attention_layer_norm/scale
Shape: float32[2048,16]
Logical: P('norm', 'layers')
Physical: (None, None)
I0417 14:25:56.048001 134857668777792 maxtext_utils.py:1651] params/params/decoder/layers/pre_self_attention_layer_norm/scale
Shape: float32[2048,16]
Logical: P('norm', 'layers')
Physical: (None, None)
I0417 14:25:56.048050 134857668777792 maxtext_utils.py:1651] 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)
I0417 14:25:56.048099 134857668777792 maxtext_utils.py:1651] 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')
I0417 14:25:56.048137 134857668777792 maxtext_utils.py:1651] 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)
I0417 14:25:56.048174 134857668777792 maxtext_utils.py:1651] 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)
I0417 14:25:56.048219 134857668777792 maxtext_utils.py:1651] params/params/decoder/logits_dense/kernel
Shape: float32[2048,32000]
Logical: P('embed_vocab', 'vocab')
Physical: ('fsdp', None)
I0417 14:25:56.048264 134857668777792 maxtext_utils.py:1651] params/params/token_embedder/embedding
Shape: float32[32000,2048]
Logical: P('vocab', 'embed_vocab')
Physical: (None, 'fsdp')
I0417 14:25:56.537781 134857668777792 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0417 14:25:56.537890 134857668777792 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0417 14:25:56.553447 134857668777792 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0417 14:25:56.553510 134857668777792 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0417 14:26:07.862924 134857668777792 max_utils.py:791] Total memory size: 1.5 GB, Output size: 0.4 GB, Temp size: 1.1 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB.
I0417 14:26:07.870703 134857668777792 metric_logger.py:301] number parameters: 1.104 billion
I0417 14:26:19.355631 134857668777792 checkpointing.py:772] Waiting for step 10 to finish before checkpoint...
I0417 14:26:19.509066 134857668777792 checkpointing.py:776] Waited 0.1534132957458496 seconds for step 10 to finish before starting checkpointing.
I0417 14:26:19.511579 134857668777792 checkpoint_manager.py:2009] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0417 14:26:19.513608 134857668777792 checkpoint_manager.py:1512] [process=0] Saving checkpoint at step 10
I0417 14:26:19.515126 134857668777792 event_tracking.py:70] [process=0] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/10.
I0417 14:26:20.486958 134857668777792 atomicity.py:140] Creating tmp directory gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/10
I0417 14:26:22.815515 134857668777792 checkpoint.py:188] Wrote Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776435981956967028, 'commit_timestamp_nsecs': None, 'custom_metadata': {}}, json={"item_handlers": null, "metrics": {}, "performance_metrics": {}, "init_timestamp_nsecs": 1776435981956967028, "commit_timestamp_nsecs": null, "custom_metadata": {}} to gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/10/_CHECKPOINT_METADATA
I0417 14:26:22.818472 134857668777792 signaling_client.py:364] Using JaxDistributedSignalingClient
I0417 14:26:22.819613 134857668777792 future.py:372] [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.
I0417 14:26:23.096324 134731888613120 atomicity.py:140] Creating tmp directory gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/10/items
I0417 14:26:24.227859 134857668777792 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0417 14:26:24.227959 134857668777792 replica_slices.py:424] 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
I0417 14:26:24.496559 134857668777792 base_pytree_checkpoint_handler.py:154] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.269583s
I0417 14:26:24.503506 134857668777792 base_pytree_checkpoint_handler.py:130] [process=0] /jax/orbax/write/blocking_gbytes_per_sec: 5.494 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28079819679260254 s) (per-host)
I0417 14:26:24.503610 134857668777792 base_pytree_checkpoint_handler.py:768] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 0.280924s (batch_requests_ready=0.002420s, total_serialization_initiated=0.271622s, others=0.006882s)
I0417 14:26:24.503720 134857668777792 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.685348s (all_items=0.000034s, per_item={'items': '0.00003409'}, temp_paths=1.685314)
I0417 14:26:24.503771 134857668777792 future.py:372] [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.
I0417 14:26:27.329473 134731871827712 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/10/items/array_metadatas/process_0
I0417 14:27:04.768502 134731379242752 base_pytree_checkpoint_handler.py:1282] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 40.264507s (commit=39.080635s, array_metadata_write=1.183873s)
I0417 14:27:04.769632 134857668777792 base_pytree_checkpoint_handler.py:130] [process=0] /jax/orbax/write/gbytes_per_sec: 38.957 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 40.54690217971802 s) (per-host)
I0417 14:27:07.136313 134857668777792 checkpoint.py:247] Updated Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776435981956967028, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} to gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/10/_CHECKPOINT_METADATA
I0417 14:27:07.138350 134857668777792 event_tracking.py:125] [process=0] [sync] Finished blocking save in 47.62 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/10.
I0417 14:27:08.138077 134857668777792 ocdbt_utils.py:49] Param validation support for Zarr3 will be added later (b/362328389).
I0417 14:27:08.158476 134857668777792 array_metadata_store.py:411] [process=0][thread=MainThread] Validated ArrayMetadata from all 8 hosts. Time taken: 0.000241s.
I0417 14:27:09.085916 134857668777792 base_pytree_checkpoint_handler.py:1406] [process=0][thread=MainThread] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 1.947279s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/10/items
I0417 14:27:09.087645 134857668777792 atomicity.py:666] Finalizing gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/10/items
I0417 14:27:09.620750 134857668777792 atomicity.py:666] Finalizing gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/10
I0417 14:27:11.458147 134857668777792 atomicity.py:847] [process=0][thread=MainThread] Finished saving checkpoint (finalized tmp dir) to `gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/10`.
I0417 14:27:11.460750 134857668777792 event_tracking.py:138] [process=0] [sync] Finished save in 51.95 seconds @ gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/10
I0417 14:27:11.463816 134857668777792 checkpoint_manager.py:2137] [process=0][thread=MainThread][step=10] CheckpointManager Save Finalize is syncing with other hosts...
I0417 14:27:11.465450 134857668777792 checkpoint_manager.py:2146] [process=0][thread=MainThread][step=10] CheckpointManager Save Finalize is done on all hosts.
I0417 14:27:11.465498 134857668777792 checkpoint_manager.py:1581] [process=0][thread=MainThread][step=10] Finished synchronous save.
I0417 14:27:11.465548 134857668777792 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1776435979.5115514, 'wait_for_prev_duration_secs': 8.845329284667969e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776435979.5136638, 'checkpointer_blocking_duration_secs': 51.94720673561096, 'get_old_steps_start_time': 1776436031.460889, 'get_old_steps_duration_secs': 2.47955322265625e-05, 'checkpoint_manager_blocking_start_time': 1776435979.5095823, 'checkpoint_manager_blocking_duration_secs': 51.95594072341919}
I0417 14:27:11.465633 134857668777792 checkpointing.py:410] Saved a checkpoint at step 10.
I0417 14:27:11.465673 134857668777792 max_utils.py:750]
Memstats: After params initialized:
I0417 14:27:11.465718 134857668777792 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_0(process=0,(0,0,0,0))
I0417 14:27:11.465749 134857668777792 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_1(process=0,(1,0,0,0))
I0417 14:27:11.465777 134857668777792 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_4(process=0,(0,1,0,0))
I0417 14:27:11.465802 134857668777792 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_5(process=0,(1,1,0,0))
I0417 14:27:11.799947 134857668777792 metric_logger.py:196] completed step: 10, seconds: 11.163, TFLOP/s/device: 1.217, Tokens/s/device: 183.468, total_weights: 65536, loss: 6.833, lm_loss: 6.833, perplexity: 927.869
I0417 14:27:11.945092 134857668777792 metric_logger.py:196] completed step: 11, seconds: 52.442, TFLOP/s/device: 0.259, Tokens/s/device: 39.052, total_weights: 65536, loss: 6.527, lm_loss: 6.527, perplexity: 683.659
I0417 14:27:12.092444 134857668777792 metric_logger.py:196] completed step: 12, seconds: 0.010, TFLOP/s/device: 1317.859, Tokens/s/device: 198642.095, total_weights: 65536, loss: 6.265, lm_loss: 6.265, perplexity: 526.068
I0417 14:27:12.239683 134857668777792 metric_logger.py:196] completed step: 13, seconds: 0.146, TFLOP/s/device: 93.297, Tokens/s/device: 14062.747, total_weights: 65536, loss: 6.045, lm_loss: 6.045, perplexity: 422.001
I0417 14:27:12.248522 134857668777792 checkpointing.py:772] Waiting for step 15 to finish before checkpoint...
I0417 14:27:12.534227 134857668777792 checkpointing.py:776] Waited 0.2855565547943115 seconds for step 15 to finish before starting checkpointing.
I0417 14:27:12.537082 134857668777792 checkpoint_manager.py:2009] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0417 14:27:12.538930 134857668777792 checkpoint_manager.py:1512] [process=0] Saving checkpoint at step 15
I0417 14:27:12.540579 134857668777792 event_tracking.py:70] [process=0] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/15.
I0417 14:27:13.463922 134857668777792 atomicity.py:140] Creating tmp directory gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/15
I0417 14:27:15.805975 134857668777792 future.py:372] [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.
I0417 14:27:16.058137 134731888613120 atomicity.py:140] Creating tmp directory gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/15/items
I0417 14:27:17.176868 134857668777792 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0417 14:27:17.177015 134857668777792 replica_slices.py:424] 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
I0417 14:27:17.263481 134857668777792 base_pytree_checkpoint_handler.py:154] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.088303s
I0417 14:27:17.274201 134857668777792 base_pytree_checkpoint_handler.py:130] [process=0] /jax/orbax/write/blocking_gbytes_per_sec: 14.408 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.10706257820129395 s) (per-host)
I0417 14:27:17.274313 134857668777792 base_pytree_checkpoint_handler.py:768] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 0.107204s (batch_requests_ready=0.004204s, total_serialization_initiated=0.092368s, others=0.010632s)
I0417 14:27:17.274460 134857668777792 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.469664s (all_items=0.000041s, per_item={'items': '0.00004101'}, temp_paths=1.469623)
I0417 14:27:17.274548 134857668777792 future.py:372] [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.
I0417 14:27:19.060267 134735657424640 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/15/items/array_metadatas/process_0
I0417 14:27:59.068598 134731379242752 base_pytree_checkpoint_handler.py:1282] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 41.794743s (commit=40.005440s, array_metadata_write=1.789303s)
I0417 14:27:59.069851 134857668777792 base_pytree_checkpoint_handler.py:130] [process=0] /jax/orbax/write/gbytes_per_sec: 37.697 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.90269923210144 s) (per-host)
I0417 14:28:00.624663 134857668777792 event_tracking.py:125] [process=0] [sync] Finished blocking save in 48.09 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/15.
I0417 14:28:01.462530 134857668777792 ocdbt_utils.py:49] Param validation support for Zarr3 will be added later (b/362328389).
I0417 14:28:01.614440 134857668777792 array_metadata_store.py:411] [process=0][thread=MainThread] Validated ArrayMetadata from all 8 hosts. Time taken: 0.000371s.
I0417 14:28:02.401005 134857668777792 base_pytree_checkpoint_handler.py:1406] [process=0][thread=MainThread] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 1.775895s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/15/items
I0417 14:28:02.403049 134857668777792 atomicity.py:666] Finalizing gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/15/items
I0417 14:28:03.357289 134857668777792 atomicity.py:666] Finalizing gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/15
I0417 14:28:05.224343 134857668777792 atomicity.py:847] [process=0][thread=MainThread] Finished saving checkpoint (finalized tmp dir) to `gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/15`.
I0417 14:28:05.227687 134857668777792 event_tracking.py:138] [process=0] [sync] Finished save in 52.69 seconds @ gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/15
I0417 14:28:05.230423 134857668777792 checkpoint_manager.py:2137] [process=0][thread=MainThread][step=15] CheckpointManager Save Finalize is syncing with other hosts...
I0417 14:28:05.231770 134857668777792 checkpoint_manager.py:2146] [process=0][thread=MainThread][step=15] CheckpointManager Save Finalize is done on all hosts.
I0417 14:28:05.231873 134857668777792 checkpoint_manager.py:1581] [process=0][thread=MainThread][step=15] Finished synchronous save.
I0417 14:28:05.232011 134857668777792 standard_logger.py:34] {'step': 15, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1776436032.5370498, 'wait_for_prev_duration_secs': 9.369850158691406e-05, 'time_between_consecutive_saves_sec': 1.0715618133544922, 'checkpointer_blocking_start_time': 1776436032.5389926, 'checkpointer_blocking_duration_secs': 52.6888632774353, 'get_old_steps_start_time': 1776436085.2278783, 'get_old_steps_duration_secs': 4.315376281738281e-05, 'checkpoint_manager_blocking_start_time': 1776436032.5348997, 'checkpoint_manager_blocking_duration_secs': 52.697060346603394}
I0417 14:28:05.232163 134857668777792 checkpointing.py:410] Saved a checkpoint at step 15.
I0417 14:28:26.573664 134857668777792 metric_logger.py:196] completed step: 14, seconds: 0.147, TFLOP/s/device: 92.308, Tokens/s/device: 13913.705, total_weights: 65536, loss: 5.864, lm_loss: 5.864, perplexity: 352.193
I0417 14:28:26.582705 134857668777792 metric_logger.py:196] completed step: 15, seconds: 0.147, TFLOP/s/device: 92.278, Tokens/s/device: 13909.075, total_weights: 65536, loss: 5.719, lm_loss: 5.719, perplexity: 304.661
I0417 14:28:26.728114 134857668777792 metric_logger.py:196] completed step: 16, seconds: 74.333, TFLOP/s/device: 0.183, Tokens/s/device: 27.552, total_weights: 65536, loss: 5.605, lm_loss: 5.605, perplexity: 271.872
I0417 14:28:26.875898 134857668777792 metric_logger.py:196] completed step: 17, seconds: 0.007, TFLOP/s/device: 1924.523, Tokens/s/device: 290084.986, total_weights: 65536, loss: 5.517, lm_loss: 5.517, perplexity: 248.975
I0417 14:28:27.023219 134857668777792 metric_logger.py:196] completed step: 18, seconds: 0.147, TFLOP/s/device: 92.703, Tokens/s/device: 13973.132, total_weights: 65536, loss: 5.448, lm_loss: 5.448, perplexity: 232.333
I0417 14:28:27.169944 134857668777792 checkpointing.py:772] Waiting for step 19 to finish before checkpoint...
I0417 14:28:27.170652 134857668777792 checkpointing.py:776] Waited 0.0007290840148925781 seconds for step 19 to finish before starting checkpointing.
I0417 14:28:27.172764 134857668777792 checkpoint_manager.py:2009] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0417 14:28:27.174618 134857668777792 checkpoint_manager.py:1512] [process=0] Saving checkpoint at step 19
I0417 14:28:27.175989 134857668777792 event_tracking.py:70] [process=0] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/19.
I0417 14:28:27.711532 134857668777792 atomicity.py:140] Creating tmp directory gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/19
I0417 14:28:29.622091 134857668777792 future.py:372] [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.
I0417 14:28:29.878331 134735649031936 atomicity.py:140] Creating tmp directory gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/19/items
I0417 14:28:30.991593 134857668777792 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0417 14:28:30.991695 134857668777792 replica_slices.py:424] 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
I0417 14:28:31.033097 134857668777792 base_pytree_checkpoint_handler.py:154] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.042536s
I0417 14:28:31.039867 134857668777792 base_pytree_checkpoint_handler.py:130] [process=0] /jax/orbax/write/blocking_gbytes_per_sec: 28.893 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.0533900260925293 s) (per-host)
I0417 14:28:31.039944 134857668777792 base_pytree_checkpoint_handler.py:768] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 0.053504s (batch_requests_ready=0.001963s, total_serialization_initiated=0.044844s, others=0.006696s)
I0417 14:28:31.040035 134857668777792 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.418994s (all_items=0.000030s, per_item={'items': '0.00003028'}, temp_paths=1.418964)
I0417 14:28:31.040083 134857668777792 future.py:372] [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.
I0417 14:28:32.837207 134734600468224 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/19/items/array_metadatas/process_0
I0417 14:29:13.536937 134731907720960 base_pytree_checkpoint_handler.py:1282] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 42.497129s (commit=40.423822s, array_metadata_write=2.073307s)
I0417 14:29:13.538070 134857668777792 base_pytree_checkpoint_handler.py:130] [process=0] /jax/orbax/write/gbytes_per_sec: 37.122 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.55158352851868 s) (per-host)
I0417 14:29:15.025923 134857668777792 event_tracking.py:125] [process=0] [sync] Finished blocking save in 47.85 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/19.
I0417 14:29:15.847536 134857668777792 ocdbt_utils.py:49] Param validation support for Zarr3 will be added later (b/362328389).
I0417 14:29:16.267651 134857668777792 array_metadata_store.py:411] [process=0][thread=MainThread] Validated ArrayMetadata from all 8 hosts. Time taken: 0.000248s.
I0417 14:29:16.943666 134857668777792 base_pytree_checkpoint_handler.py:1406] [process=0][thread=MainThread] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 1.917428s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/19/items
I0417 14:29:16.945399 134857668777792 atomicity.py:666] Finalizing gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/19/items
I0417 14:29:17.475685 134857668777792 atomicity.py:666] Finalizing gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/19
I0417 14:29:19.187891 134857668777792 atomicity.py:847] [process=0][thread=MainThread] Finished saving checkpoint (finalized tmp dir) to `gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/19`.
I0417 14:29:19.190595 134857668777792 event_tracking.py:138] [process=0] [sync] Finished save in 52.02 seconds @ gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints/19
I0417 14:29:19.192935 134857668777792 checkpoint_manager.py:2137] [process=0][thread=MainThread][step=19] CheckpointManager Save Finalize is syncing with other hosts...
I0417 14:29:19.194612 134857668777792 checkpoint_manager.py:2146] [process=0][thread=MainThread][step=19] CheckpointManager Save Finalize is done on all hosts.
I0417 14:29:19.194660 134857668777792 checkpoint_manager.py:1581] [process=0][thread=MainThread][step=19] Finished synchronous save.
I0417 14:29:19.194710 134857668777792 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260417_125726/linen_xpk_main_20260417_125726_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1776436107.1727445, 'wait_for_prev_duration_secs': 5.817413330078125e-05, 'time_between_consecutive_saves_sec': 21.94089126586914, 'checkpointer_blocking_start_time': 1776436107.174657, 'checkpointer_blocking_duration_secs': 52.01604223251343, 'get_old_steps_start_time': 1776436159.1907146, 'get_old_steps_duration_secs': 2.3603439331054688e-05, 'checkpoint_manager_blocking_start_time': 1776436107.1709, 'checkpoint_manager_blocking_duration_secs': 52.02378606796265}
I0417 14:29:19.194797 134857668777792 checkpointing.py:410] Saved a checkpoint at step 19.
I0417 14:29:19.194855 134857668777792 checkpoint_manager.py:2009] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0417 14:29:19.194886 134857668777792 checkpoint_manager.py:2009] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0417 14:29:19.195610 134857668777792 metric_logger.py:196] completed step: 19, seconds: 0.147, TFLOP/s/device: 92.144, Tokens/s/device: 13888.983, total_weights: 65536, loss: 5.391, lm_loss: 5.391, perplexity: 219.349
Per train step:
Total TFLOPs: 13.59
split as 93.93% learnable weight flops and 6.07% attention flops
XPK End: Fri Apr 17 14:29:27 UTC 2026
EXIT_CODE=0