XPK Start: Sat Apr 18 19:11:48 UTC 2026
PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used.
2026-04-18 19:12:12.015509: 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)
I0418 19:12:12.548936 139016938563392 max_utils.py:273] Attempting to initialize the jax distributed system...
I0418 19:12:21.589657 139016938563392 distributed.py:149] Starting JAX distributed service on [::]:8482
I0418 19:12:21.592174 139016938563392 distributed.py:172] Connecting to JAX distributed service on mt-14-async-ckpt-false--825vo-slice-job-0-0.mt-14-async-ckpt-false--825vo:8482
I0418 19:12:22.345292 139016938563392 max_utils.py:284] Jax distributed system initialized!
I0418 19:12:28.331783 139016938563392 max_utils.py:800] System Information: Jax Version: 0.9.2
I0418 19:12:28.331888 139016938563392 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0418 19:12:28.331928 139016938563392 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
I0418 19:12:28.331964 139016938563392 train_utils.py:348] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0418 19:12:29.025496 139016938563392 maxtext_utils.py:1551] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0418 19:12:29.025770 139016938563392 checkpointing.py:677] Setting up checkpoint logger...
I0418 19:12:29.025824 139016938563392 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True
I0418 19:12:29.025879 139016938563392 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0418 19:12:29.026230 139016938563392 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 0x7e6ec4510170>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0418 19:12:31.948239 139016938563392 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0418 19:12:31.948471 139016938563392 checkpoint_manager.py:708] [process=7][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e5a7c112ae0>}, handler_registry=None
I0418 19:12:31.948704 139016938563392 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e5a7c112ae0>` 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`.
I0418 19:12:31.948750 139016938563392 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e5a7c113140>` 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`.
I0418 19:12:31.948785 139016938563392 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 0x7e5a7c112ae0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e5a7c112ae0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e5a7c113140>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e5a7c113140>}).
I0418 19:12:31.949123 139016938563392 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0418 19:12:33.603208 139016938563392 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_14_async_ckpt_false/checkpoints
I0418 19:12:34.463975 139016938563392 checkpoint_manager.py:929] [process=7][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_20260418_180002/linen_xpk_main_20260418_180002_14_async_ckpt_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7e5a7c2fcf20>
I0418 19:12:34.464167 139016938563392 checkpointing.py:301] Checkpoint manager created!
I0418 19:12:35.417415 139016938563392 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0418 19:12:35.417529 139016938563392 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0418 19:12:35.796562 139016938563392 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0418 19:12:35.796649 139016938563392 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0418 19:12:35.812982 139016938563392 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0418 19:12:35.813041 139016938563392 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0418 19:12:35.837281 139016938563392 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0418 19:12:35.837351 139016938563392 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0418 19:12:35.853809 139016938563392 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0418 19:12:35.853874 139016938563392 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0418 19:12:35.870159 139016938563392 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0418 19:12:35.870220 139016938563392 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0418 19:12:35.894760 139016938563392 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0418 19:12:35.894828 139016938563392 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0418 19:12:35.915779 139016938563392 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0418 19:12:35.915844 139016938563392 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0418 19:12:36.134122 139016938563392 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0418 19:12:36.134234 139016938563392 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0418 19:12:37.578081 139016938563392 maxtext_utils.py:1654] params/params/decoder/decoder_norm/scale
Shape: float32[2048]
Logical: P('norm',)
Physical: (None,)
I0418 19:12:37.578206 139016938563392 maxtext_utils.py:1654] params/params/decoder/layers/mlp/wi_0/kernel
Shape: float32[2048,16,7168]
Logical: P('embed', 'layers', 'mlp')
Physical: ('fsdp', None, None)
I0418 19:12:37.578258 139016938563392 maxtext_utils.py:1654] params/params/decoder/layers/mlp/wi_1/kernel
Shape: float32[2048,16,7168]
Logical: P('embed', 'layers', 'mlp')
Physical: ('fsdp', None, None)
I0418 19:12:37.578314 139016938563392 maxtext_utils.py:1654] params/params/decoder/layers/mlp/wo/kernel
Shape: float32[7168,16,2048]
Logical: P('mlp', 'layers', 'embed')
Physical: (None, None, 'fsdp')
I0418 19:12:37.578366 139016938563392 maxtext_utils.py:1654] params/params/decoder/layers/post_self_attention_layer_norm/scale
Shape: float32[2048,16]
Logical: P('norm', 'layers')
Physical: (None, None)
I0418 19:12:37.578404 139016938563392 maxtext_utils.py:1654] params/params/decoder/layers/pre_self_attention_layer_norm/scale
Shape: float32[2048,16]
Logical: P('norm', 'layers')
Physical: (None, None)
I0418 19:12:37.578454 139016938563392 maxtext_utils.py:1654] 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)
I0418 19:12:37.578506 139016938563392 maxtext_utils.py:1654] 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')
I0418 19:12:37.578547 139016938563392 maxtext_utils.py:1654] 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)
I0418 19:12:37.578583 139016938563392 maxtext_utils.py:1654] 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)
I0418 19:12:37.578634 139016938563392 maxtext_utils.py:1654] params/params/decoder/logits_dense/kernel
Shape: float32[2048,32000]
Logical: P('embed_vocab', 'vocab')
Physical: ('fsdp', None)
I0418 19:12:37.578682 139016938563392 maxtext_utils.py:1654] params/params/token_embedder/embedding
Shape: float32[32000,2048]
Logical: P('vocab', 'embed_vocab')
Physical: (None, 'fsdp')
I0418 19:12:38.067620 139016938563392 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0418 19:12:38.067723 139016938563392 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0418 19:12:38.083106 139016938563392 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0418 19:12:38.083166 139016938563392 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0418 19:12:48.924404 139016938563392 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.
I0418 19:12:48.925253 139016938563392 metric_logger.py:301] number parameters: 1.104 billion
I0418 19:13:00.018760 139016938563392 checkpointing.py:772] Waiting for step 0 to finish before checkpoint...
I0418 19:13:00.363813 139016938563392 checkpointing.py:776] Waited 0.3450334072113037 seconds for step 0 to finish before starting checkpointing.
I0418 19:13:00.366234 139016938563392 checkpoint_manager.py:2009] [process=7][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0418 19:13:00.367920 139016938563392 checkpoint_manager.py:1512] [process=7] Saving checkpoint at step 0
I0418 19:13:00.369482 139016938563392 event_tracking.py:70] [process=7] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_14_async_ckpt_false/checkpoints/0.
I0418 19:13:04.677109 139016938563392 signaling_client.py:364] Using JaxDistributedSignalingClient
I0418 19:13:04.678389 139016938563392 future.py:372] [process=7][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.
I0418 19:13:06.473264 139016938563392 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0418 19:13:06.473362 139016938563392 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
I0418 19:13:06.754823 139016938563392 base_pytree_checkpoint_handler.py:154] [process=7][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.282868s
I0418 19:13:06.755020 139016938563392 base_pytree_checkpoint_handler.py:130] [process=7] /jax/orbax/write/blocking_gbytes_per_sec: 5.346 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2885310649871826 s) (per-host)
I0418 19:13:06.755094 139016938563392 base_pytree_checkpoint_handler.py:768] [process=7][thread=MainThread] Initiated Pytree async_save. Time taken: 0.288601s (batch_requests_ready=0.002357s, total_serialization_initiated=0.286166s, others=0.000078s)
I0418 19:13:06.755196 139016938563392 composite_checkpoint_handler.py:715] [process=7][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 2.078214s (all_items=0.000033s, per_item={'items': '0.00003290'}, temp_paths=2.078181)
I0418 19:13:06.755245 139016938563392 future.py:372] [process=7][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.
I0418 19:13:06.755286 139016938563392 future.py:372] [process=7][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.
I0418 19:13:06.768987 2778 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0418 19:13:10.590637 138886445901568 array_metadata_store.py:203] [process=7][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_14_async_ckpt_false/checkpoints/0/items/array_metadatas/process_7
I0418 19:13:38.891208 139016938563392 base_pytree_checkpoint_handler.py:130] [process=7] /jax/orbax/write/gbytes_per_sec: 48.716 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 32.42467951774597 s) (per-host)
I0418 19:13:46.057825 139016938563392 event_tracking.py:125] [process=7] [sync] Finished blocking save in 45.69 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_14_async_ckpt_false/checkpoints/0.
I0418 19:13:51.037813 139016938563392 event_tracking.py:138] [process=7] [sync] Finished save in 50.67 seconds @ gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_14_async_ckpt_false/checkpoints/0
I0418 19:13:51.040398 139016938563392 checkpoint_manager.py:2137] [process=7][thread=MainThread][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0418 19:13:51.042356 139016938563392 checkpoint_manager.py:2146] [process=7][thread=MainThread][step=0] CheckpointManager Save Finalize is done on all hosts.
I0418 19:13:51.042408 139016938563392 checkpoint_manager.py:1581] [process=7][thread=MainThread][step=0] Finished synchronous save.
I0418 19:13:51.042464 139016938563392 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1776539580.3662155, 'wait_for_prev_duration_secs': 6.222724914550781e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776539580.3679574, 'checkpointer_blocking_duration_secs': 50.669997692108154, 'get_old_steps_start_time': 1776539631.0379791, 'get_old_steps_duration_secs': 2.5510787963867188e-05, 'checkpoint_manager_blocking_start_time': 1776539580.3643627, 'checkpoint_manager_blocking_duration_secs': 50.678072929382324}
I0418 19:13:51.042553 139016938563392 checkpointing.py:410] Saved a checkpoint at step 0.
I0418 19:13:51.042598 139016938563392 max_utils.py:750]
Memstats: After params initialized:
I0418 19:13:51.042644 139016938563392 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_26(process=7,(2,6,0,0))
I0418 19:13:51.042675 139016938563392 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_27(process=7,(3,6,0,0))
I0418 19:13:51.042703 139016938563392 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_30(process=7,(2,7,0,0))
I0418 19:13:51.042727 139016938563392 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_31(process=7,(3,7,0,0))
I0418 19:13:51.363059 139016938563392 metric_logger.py:196] completed step: 0, seconds: 11.093, TFLOP/s/device: 1.225, Tokens/s/device: 184.614, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0418 19:13:51.530789 139016938563392 metric_logger.py:196] completed step: 1, seconds: 51.337, TFLOP/s/device: 0.265, Tokens/s/device: 39.893, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0418 19:13:51.949755 139016938563392 metric_logger.py:196] completed step: 2, seconds: 0.026, TFLOP/s/device: 527.389, Tokens/s/device: 79493.848, total_weights: 65536, loss: 10.560, lm_loss: 10.560, perplexity: 38547.719
I0418 19:13:52.097509 139016938563392 metric_logger.py:196] completed step: 3, seconds: 0.419, TFLOP/s/device: 32.398, Tokens/s/device: 4883.306, total_weights: 65536, loss: 9.980, lm_loss: 9.980, perplexity: 21590.506
I0418 19:13:52.102066 139016938563392 checkpointing.py:772] Waiting for step 5 to finish before checkpoint...
I0418 19:13:52.391683 139016938563392 checkpointing.py:776] Waited 0.2895810604095459 seconds for step 5 to finish before starting checkpointing.
I0418 19:13:52.394587 139016938563392 checkpoint_manager.py:2009] [process=7][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0418 19:13:52.396659 139016938563392 checkpoint_manager.py:1512] [process=7] Saving checkpoint at step 5
I0418 19:13:52.398689 139016938563392 event_tracking.py:70] [process=7] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_14_async_ckpt_false/checkpoints/5.
I0418 19:13:55.701721 139016938563392 future.py:372] [process=7][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.
I0418 19:13:57.514626 139016938563392 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0418 19:13:57.514728 139016938563392 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
I0418 19:13:57.550301 139016938563392 base_pytree_checkpoint_handler.py:154] [process=7][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.036952s
I0418 19:13:57.550453 139016938563392 base_pytree_checkpoint_handler.py:130] [process=7] /jax/orbax/write/blocking_gbytes_per_sec: 37.901 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.040700435638427734 s) (per-host)
I0418 19:13:57.550508 139016938563392 base_pytree_checkpoint_handler.py:768] [process=7][thread=MainThread] Initiated Pytree async_save. Time taken: 0.040763s (batch_requests_ready=0.001791s, total_serialization_initiated=0.038902s, others=0.000070s)
I0418 19:13:57.550594 139016938563392 composite_checkpoint_handler.py:715] [process=7][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.850245s (all_items=0.000028s, per_item={'items': '0.00002789'}, temp_paths=1.850218)
I0418 19:13:57.550636 139016938563392 future.py:372] [process=7][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.
I0418 19:13:57.550672 139016938563392 future.py:372] [process=7][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.
I0418 19:14:00.366059 138888633988864 array_metadata_store.py:203] [process=7][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_14_async_ckpt_false/checkpoints/5/items/array_metadatas/process_7
I0418 19:14:34.958979 139016938563392 base_pytree_checkpoint_handler.py:130] [process=7] /jax/orbax/write/gbytes_per_sec: 42.180 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 37.44917106628418 s) (per-host)
I0418 19:14:42.133447 139016938563392 event_tracking.py:125] [process=7] [sync] Finished blocking save in 49.74 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_14_async_ckpt_false/checkpoints/5.
I0418 19:14:46.982785 139016938563392 event_tracking.py:138] [process=7] [sync] Finished save in 54.59 seconds @ gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_14_async_ckpt_false/checkpoints/5
I0418 19:14:46.985069 139016938563392 checkpoint_manager.py:2137] [process=7][thread=MainThread][step=5] CheckpointManager Save Finalize is syncing with other hosts...
I0418 19:14:46.987099 139016938563392 checkpoint_manager.py:2146] [process=7][thread=MainThread][step=5] CheckpointManager Save Finalize is done on all hosts.
I0418 19:14:46.987150 139016938563392 checkpoint_manager.py:1581] [process=7][thread=MainThread][step=5] Finished synchronous save.
I0418 19:14:46.987205 139016938563392 standard_logger.py:34] {'step': 5, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1776539632.394567, 'wait_for_prev_duration_secs': 6.318092346191406e-05, 'time_between_consecutive_saves_sec': 1.3521697521209717, 'checkpointer_blocking_start_time': 1776539632.3966985, 'checkpointer_blocking_duration_secs': 54.586207151412964, 'get_old_steps_start_time': 1776539686.9829257, 'get_old_steps_duration_secs': 2.5987625122070312e-05, 'checkpoint_manager_blocking_start_time': 1776539632.3923445, 'checkpoint_manager_blocking_duration_secs': 54.59483242034912}
I0418 19:14:46.987294 139016938563392 checkpointing.py:410] Saved a checkpoint at step 5.
I0418 19:14:46.988112 139016938563392 metric_logger.py:196] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.658, Tokens/s/device: 13363.523, total_weights: 65536, loss: 9.460, lm_loss: 9.460, perplexity: 12840.355
I0418 19:14:47.004925 139016938563392 metric_logger.py:196] completed step: 5, seconds: 0.148, TFLOP/s/device: 92.112, Tokens/s/device: 13884.087, total_weights: 65536, loss: 8.959, lm_loss: 8.959, perplexity: 7776.467
I0418 19:15:10.739608 139016938563392 metric_logger.py:196] completed step: 6, seconds: 54.891, TFLOP/s/device: 0.248, Tokens/s/device: 37.311, total_weights: 65536, loss: 8.469, lm_loss: 8.469, perplexity: 4762.740
I0418 19:15:10.887140 139016938563392 metric_logger.py:196] completed step: 7, seconds: 23.599, TFLOP/s/device: 0.576, Tokens/s/device: 86.782, total_weights: 65536, loss: 8.003, lm_loss: 8.003, perplexity: 2989.151
I0418 19:15:11.034745 139016938563392 metric_logger.py:196] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.189, Tokens/s/device: 13443.525, total_weights: 65536, loss: 7.572, lm_loss: 7.572, perplexity: 1943.098
I0418 19:15:11.181392 139016938563392 checkpointing.py:772] Waiting for step 9 to finish before checkpoint...
I0418 19:15:11.182067 139016938563392 checkpointing.py:776] Waited 0.0006973743438720703 seconds for step 9 to finish before starting checkpointing.
I0418 19:15:11.184140 139016938563392 checkpoint_manager.py:2009] [process=7][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0418 19:15:11.186104 139016938563392 checkpoint_manager.py:1512] [process=7] Saving checkpoint at step 9
I0418 19:15:11.187450 139016938563392 event_tracking.py:70] [process=7] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_14_async_ckpt_false/checkpoints/9.
I0418 19:15:14.614771 139016938563392 future.py:372] [process=7][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.
I0418 19:15:16.393754 139016938563392 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0418 19:15:16.393860 139016938563392 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
I0418 19:15:16.428682 139016938563392 base_pytree_checkpoint_handler.py:154] [process=7][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.037516s
I0418 19:15:16.428861 139016938563392 base_pytree_checkpoint_handler.py:130] [process=7] /jax/orbax/write/blocking_gbytes_per_sec: 37.449 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04119086265563965 s) (per-host)
I0418 19:15:16.428914 139016938563392 base_pytree_checkpoint_handler.py:768] [process=7][thread=MainThread] Initiated Pytree async_save. Time taken: 0.041255s (batch_requests_ready=0.001850s, total_serialization_initiated=0.039335s, others=0.000069s)
I0418 19:15:16.429015 139016938563392 composite_checkpoint_handler.py:715] [process=7][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.816090s (all_items=0.000032s, per_item={'items': '0.00003219'}, temp_paths=1.816058)
I0418 19:15:16.429056 139016938563392 future.py:372] [process=7][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.
I0418 19:15:16.429112 139016938563392 future.py:372] [process=7][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.
I0418 19:15:18.917462 138892372068096 array_metadata_store.py:203] [process=7][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_14_async_ckpt_false/checkpoints/9/items/array_metadatas/process_7
I0418 19:15:53.644312 139016938563392 base_pytree_checkpoint_handler.py:130] [process=7] /jax/orbax/write/gbytes_per_sec: 42.398 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 37.25660276412964 s) (per-host)
I0418 19:16:03.932551 139016938563392 event_tracking.py:125] [process=7] [sync] Finished blocking save in 52.75 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_14_async_ckpt_false/checkpoints/9.
I0418 19:16:09.187234 139016938563392 event_tracking.py:138] [process=7] [sync] Finished save in 58.00 seconds @ gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_14_async_ckpt_false/checkpoints/9
I0418 19:16:09.189231 139016938563392 checkpoint_manager.py:2137] [process=7][thread=MainThread][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0418 19:16:09.191120 139016938563392 checkpoint_manager.py:2146] [process=7][thread=MainThread][step=9] CheckpointManager Save Finalize is done on all hosts.
I0418 19:16:09.191170 139016938563392 checkpoint_manager.py:1581] [process=7][thread=MainThread][step=9] Finished synchronous save.
I0418 19:16:09.191217 139016938563392 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1776539711.1841223, 'wait_for_prev_duration_secs': 5.698204040527344e-05, 'time_between_consecutive_saves_sec': 24.19698429107666, 'checkpointer_blocking_start_time': 1776539711.1861417, 'checkpointer_blocking_duration_secs': 58.00120496749878, 'get_old_steps_start_time': 1776539769.1873596, 'get_old_steps_duration_secs': 2.1219253540039062e-05, 'checkpoint_manager_blocking_start_time': 1776539711.1823123, 'checkpoint_manager_blocking_duration_secs': 58.00888156890869}
I0418 19:16:09.191302 139016938563392 checkpointing.py:410] Saved a checkpoint at step 9.
I0418 19:16:09.191334 139016938563392 checkpoint_manager.py:2009] [process=7][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0418 19:16:09.191364 139016938563392 checkpoint_manager.py:2009] [process=7][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0418 19:16:09.192053 139016938563392 metric_logger.py:196] completed step: 9, seconds: 0.148, TFLOP/s/device: 92.112, Tokens/s/device: 13884.087, total_weights: 65536, loss: 7.181, lm_loss: 7.181, perplexity: 1314.495
Per train step:
Total TFLOPs: 13.59
split as 93.93% learnable weight flops and 6.07% attention flops
XPK End: Sat Apr 18 19:16:18 UTC 2026
EXIT_CODE=0