XPK Start: Wed Apr 22 22:53:19 UTC 2026
PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used.
`rope_parameters`'s factor field must be a float >= 1, got 40
`rope_parameters`'s beta_fast field must be a float, got 32
`rope_parameters`'s beta_slow field must be a float, got 1
DeepseekV32Config got `key=rope_scaling` in kwargs but hasn't set it as attribute. For RoPE standardization you need to set `self.rope_parameters` in model's config.
2026-04-22 22:53:44.285379: 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)
I0422 22:53:44.496359 140593315043136 max_utils.py:273] Attempting to initialize the jax distributed system...
I0422 22:53:53.538763 140593315043136 distributed.py:149] Starting JAX distributed service on [::]:8482
I0422 22:53:53.541210 140593315043136 distributed.py:172] Connecting to JAX distributed service on mt-16-zarr3-false-sv-5dm3n-slice-job-0-0.mt-16-zarr3-false-sv-5dm3n:8482
I0422 22:53:54.869127 140593315043136 max_utils.py:284] Jax distributed system initialized!
I0422 22:53:59.930533 140593315043136 max_utils.py:800] System Information: Jax Version: 0.9.2
I0422 22:53:59.930636 140593315043136 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0422 22:53:59.930676 140593315043136 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
I0422 22:53:59.930713 140593315043136 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0422 22:54:00.627151 140593315043136 maxtext_utils.py:1565] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0422 22:54:00.627431 140593315043136 checkpointing.py:677] Setting up checkpoint logger...
I0422 22:54:00.627486 140593315043136 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=False
I0422 22:54:00.627537 140593315043136 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0422 22:54:00.627882 140593315043136 base_pytree_checkpoint_handler.py:441] Created BasePyTreeCheckpointHandler: use_ocdbt=True, use_zarr3=False, pytree_metadata_options=PyTreeMetadataOptions(support_rich_types=False), array_metadata_store=<orbax.checkpoint._src.metadata.array_metadata_store.Store object at 0x7fddb6e50d70>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0422 22:54:04.033207 140593315043136 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0422 22:54:04.033511 140593315043136 checkpoint_manager.py:708] [process=6][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7fca20547bf0>}, handler_registry=None
I0422 22:54:04.033751 140593315043136 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7fca20547bf0>` 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`.
I0422 22:54:04.033799 140593315043136 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7fca20548d10>` 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`.
I0422 22:54:04.033835 140593315043136 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 0x7fca20547bf0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7fca20547bf0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7fca20548d10>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7fca20548d10>}).
I0422 22:54:04.034174 140593315043136 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0422 22:54:04.034247 140593315043136 async_checkpointer.py:192] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7fca202df560> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0422 22:54:04.715837 140593315043136 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_16_zarr3_false/checkpoints
I0422 22:54:05.573702 140593315043136 checkpoint_manager.py:929] [process=6][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=True, async_options=None, multiprocessing_options=MultiprocessingOptions(primary_host=0, active_processes=None, barrier_sync_key_prefix=None), should_save_fn=None, file_options=FileOptions(path_permission_mode=None), save_root_metadata=True, temporary_path_class=None, save_decision_policy=FixedIntervalPolicy(interval=5), preservation_policy=LatestN(n=None), prevent_write_metrics=False, enable_should_save_is_saving_in_progress_check=True, enable_per_process_directory_creation=False, lightweight_initialize=False), root_directory=gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_16_zarr3_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7fca20549670>
I0422 22:54:05.573883 140593315043136 checkpointing.py:301] Checkpoint manager created!
I0422 22:54:06.523659 140593315043136 nnx_wrappers.py:453] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0422 22:54:06.523777 140593315043136 nnx_wrappers.py:453] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0422 22:54:06.904611 140593315043136 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0422 22:54:06.904706 140593315043136 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0422 22:54:06.921328 140593315043136 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0422 22:54:06.921391 140593315043136 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0422 22:54:06.945194 140593315043136 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0422 22:54:06.945261 140593315043136 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0422 22:54:06.962037 140593315043136 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0422 22:54:06.962109 140593315043136 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0422 22:54:06.978939 140593315043136 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0422 22:54:06.979003 140593315043136 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0422 22:54:07.004042 140593315043136 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0422 22:54:07.004125 140593315043136 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0422 22:54:07.025547 140593315043136 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0422 22:54:07.025612 140593315043136 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0422 22:54:07.239331 140593315043136 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0422 22:54:07.239440 140593315043136 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0422 22:54:08.682830 140593315043136 maxtext_utils.py:1668] params/params/decoder/decoder_norm/scale
Shape: float32[2048]
Logical: P('norm',)
Physical: (None,)
I0422 22:54:08.682958 140593315043136 maxtext_utils.py:1668] params/params/decoder/layers/mlp/wi_0/kernel
Shape: float32[2048,16,7168]
Logical: P('embed', 'layers', 'mlp')
Physical: ('fsdp', None, None)
I0422 22:54:08.683012 140593315043136 maxtext_utils.py:1668] params/params/decoder/layers/mlp/wi_1/kernel
Shape: float32[2048,16,7168]
Logical: P('embed', 'layers', 'mlp')
Physical: ('fsdp', None, None)
I0422 22:54:08.683069 140593315043136 maxtext_utils.py:1668] params/params/decoder/layers/mlp/wo/kernel
Shape: float32[7168,16,2048]
Logical: P('mlp', 'layers', 'embed')
Physical: (None, None, 'fsdp')
I0422 22:54:08.683136 140593315043136 maxtext_utils.py:1668] params/params/decoder/layers/post_self_attention_layer_norm/scale
Shape: float32[2048,16]
Logical: P('norm', 'layers')
Physical: (None, None)
I0422 22:54:08.683178 140593315043136 maxtext_utils.py:1668] params/params/decoder/layers/pre_self_attention_layer_norm/scale
Shape: float32[2048,16]
Logical: P('norm', 'layers')
Physical: (None, None)
I0422 22:54:08.683233 140593315043136 maxtext_utils.py:1668] 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)
I0422 22:54:08.683286 140593315043136 maxtext_utils.py:1668] 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')
I0422 22:54:08.683331 140593315043136 maxtext_utils.py:1668] 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)
I0422 22:54:08.683368 140593315043136 maxtext_utils.py:1668] 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)
I0422 22:54:08.683417 140593315043136 maxtext_utils.py:1668] params/params/decoder/logits_dense/kernel
Shape: float32[2048,32000]
Logical: P('embed_vocab', 'vocab')
Physical: ('fsdp', None)
I0422 22:54:08.683466 140593315043136 maxtext_utils.py:1668] params/params/token_embedder/embedding
Shape: float32[32000,2048]
Logical: P('vocab', 'embed_vocab')
Physical: (None, 'fsdp')
I0422 22:54:09.175393 140593315043136 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0422 22:54:09.175485 140593315043136 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0422 22:54:09.191286 140593315043136 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0422 22:54:09.191349 140593315043136 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0422 22:54:20.256703 140593315043136 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.
I0422 22:54:20.257521 140593315043136 metric_logger.py:301] number parameters: 1.104 billion
I0422 22:54:32.085198 140593315043136 checkpointing.py:772] Waiting for step 0 to finish before checkpoint...
I0422 22:54:32.241301 140593315043136 checkpointing.py:776] Waited 0.15608811378479004 seconds for step 0 to finish before starting checkpointing.
I0422 22:54:32.243707 140593315043136 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0422 22:54:32.245294 140593315043136 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 0
I0422 22:54:32.246762 140593315043136 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_16_zarr3_false/checkpoints/0.
I0422 22:54:32.988389 140593315043136 signaling_client.py:364] Using JaxDistributedSignalingClient
I0422 22:54:32.989558 140593315043136 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0422 22:54:32.989616 140593315043136 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
I0422 22:54:33.266704 140593315043136 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.278389s
I0422 22:54:33.266877 140593315043136 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 5.433 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28392505645751953 s) (per-host)
I0422 22:54:33.266931 140593315043136 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.283988s (batch_requests_ready=0.002241s, total_serialization_initiated=0.281676s, others=0.000071s)
I0422 22:54:33.267024 140593315043136 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.288155s (all_items=0.000019s, per_item={'items': '0.00001907'}, temp_paths=0.288136)
I0422 22:54:33.267921 140593315043136 event_tracking.py:125] [process=6] [async] Finished blocking save in 1.02 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_16_zarr3_false/checkpoints/0.
I0422 22:54:33.268242 140467567335168 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-22 23:14:33.268206
I0422 22:54:33.279308 140593315043136 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0422 22:54:33.279618 140464853616384 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0422 22:54:33.279778 140593315043136 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_16_zarr3_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776898472.2436883, 'wait_for_prev_duration_secs': 6.532669067382812e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776898472.2453372, 'checkpointer_blocking_duration_secs': 1.0230669975280762, 'get_old_steps_start_time': 1776898473.268432, 'get_old_steps_duration_secs': 3.147125244140625e-05, 'checkpoint_manager_blocking_start_time': 1776898472.2418137, 'checkpoint_manager_blocking_duration_secs': 1.0379247665405273}
I0422 22:54:33.279889 140593315043136 checkpointing.py:408] Started an asynchronous checkpoint save for step 0
I0422 22:54:33.279937 140593315043136 max_utils.py:750]
Memstats: After params initialized:
I0422 22:54:33.279984 140593315043136 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0))
I0422 22:54:33.280017 140593315043136 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0))
I0422 22:54:33.280045 140593315043136 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0))
I0422 22:54:33.280070 140593315043136 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0))
I0422 22:54:33.595848 140593315043136 metric_logger.py:196] completed step: 0, seconds: 11.828, TFLOP/s/device: 1.149, Tokens/s/device: 173.155, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0422 22:54:33.782270 140593315043136 metric_logger.py:196] completed step: 1, seconds: 1.509, TFLOP/s/device: 9.003, Tokens/s/device: 1357.069, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0422 22:54:34.198851 140593315043136 metric_logger.py:196] completed step: 2, seconds: 0.039, TFLOP/s/device: 349.868, Tokens/s/device: 52735.934, total_weights: 65536, loss: 10.560, lm_loss: 10.560, perplexity: 38547.719
I0422 22:54:34.346189 140593315043136 metric_logger.py:196] completed step: 3, seconds: 0.417, TFLOP/s/device: 32.583, Tokens/s/device: 4911.200, total_weights: 65536, loss: 9.980, lm_loss: 9.980, perplexity: 21590.506
I0422 22:54:34.350530 140593315043136 checkpointing.py:772] Waiting for step 5 to finish before checkpoint...
I0422 22:54:34.640650 140593315043136 checkpointing.py:776] Waited 0.290086030960083 seconds for step 5 to finish before starting checkpointing.
I0422 22:54:34.643671 140593315043136 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0422 22:54:36.174151 2772 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0422 22:54:38.176030 140465395164928 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_16_zarr3_false/checkpoints/0/items/array_metadatas/process_6
I0422 22:55:14.084457 140467567335168 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 38.432 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.101465702056885 s) (per-host)
I0422 22:55:14.084578 140467567335168 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 40.816221s.
I0422 22:55:22.043292 140467567335168 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 48.774919s.
I0422 22:55:22.043600 140464853616384 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0422 22:55:22.043723 140464853616384 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0422 22:55:22.043774 140464853616384 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0422 22:55:22.046450 140464853616384 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0422 22:55:22.046633 140593315043136 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0422 22:55:22.046776 140593315043136 checkpoint_manager.py:1452] Waiting for previous save to complete took 47.403103 seconds. If this number is high, consider checkpointing less frequently.
I0422 22:55:22.048595 140593315043136 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 5
I0422 22:55:22.051058 140593315043136 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_16_zarr3_false/checkpoints/5.
I0422 22:55:22.770236 140593315043136 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0422 22:55:22.770337 140593315043136 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
I0422 22:55:22.812429 140593315043136 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.043399s
I0422 22:55:22.812592 140593315043136 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 32.921 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04685664176940918 s) (per-host)
I0422 22:55:22.812642 140593315043136 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.046916s (batch_requests_ready=0.001806s, total_serialization_initiated=0.045044s, others=0.000066s)
I0422 22:55:22.812734 140593315043136 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.051953s (all_items=0.000015s, per_item={'items': '0.00001502'}, temp_paths=0.051938)
I0422 22:55:22.813460 140593315043136 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.76 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_16_zarr3_false/checkpoints/5.
I0422 22:55:22.813798 140464853616384 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-22 23:15:22.813761
I0422 22:55:22.818604 140593315043136 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=5] Starting CheckpointManager Save Finalize thread=save_finalize
I0422 22:55:22.818876 140465395164928 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0422 22:55:22.819039 140593315043136 standard_logger.py:34] {'step': 5, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_16_zarr3_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776898474.6436422, 'wait_for_prev_duration_secs': 47.40310263633728, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776898522.0486345, 'checkpointer_blocking_duration_secs': 0.7653093338012695, 'get_old_steps_start_time': 1776898522.813968, 'get_old_steps_duration_secs': 3.0279159545898438e-05, 'checkpoint_manager_blocking_start_time': 1776898474.6412797, 'checkpoint_manager_blocking_duration_secs': 48.17772436141968}
I0422 22:55:22.819172 140593315043136 checkpointing.py:408] Started an asynchronous checkpoint save for step 5
I0422 22:55:22.819970 140593315043136 metric_logger.py:196] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.822, Tokens/s/device: 13388.159, total_weights: 65536, loss: 9.460, lm_loss: 9.460, perplexity: 12840.355
I0422 22:55:22.825575 140593315043136 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.255, Tokens/s/device: 13905.675, total_weights: 65536, loss: 8.959, lm_loss: 8.959, perplexity: 7776.467
I0422 22:55:29.972115 140445556389632 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_16_zarr3_false/checkpoints/5/items/array_metadatas/process_6
I0422 22:55:46.110549 140593315043136 metric_logger.py:196] completed step: 6, seconds: 48.474, TFLOP/s/device: 0.280, Tokens/s/device: 42.250, total_weights: 65536, loss: 8.469, lm_loss: 8.469, perplexity: 4762.740
I0422 22:55:46.258063 140593315043136 metric_logger.py:196] completed step: 7, seconds: 23.139, TFLOP/s/device: 0.587, Tokens/s/device: 88.510, total_weights: 65536, loss: 8.003, lm_loss: 8.003, perplexity: 2989.151
I0422 22:55:46.405268 140593315043136 metric_logger.py:196] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.356, Tokens/s/device: 13468.722, total_weights: 65536, loss: 7.572, lm_loss: 7.572, perplexity: 1943.098
I0422 22:55:46.552070 140593315043136 checkpointing.py:772] Waiting for step 9 to finish before checkpoint...
I0422 22:55:46.552692 140593315043136 checkpointing.py:776] Waited 0.0006415843963623047 seconds for step 9 to finish before starting checkpointing.
I0422 22:55:46.555082 140593315043136 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=5][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0422 22:56:05.598271 140464853616384 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 36.878 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.83248448371887 s) (per-host)
I0422 22:56:05.598398 140464853616384 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.784483s.
I0422 22:56:14.433706 140464853616384 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 51.619774s.
I0422 22:56:14.433991 140465395164928 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0422 22:56:14.434127 140465395164928 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0422 22:56:14.434177 140465395164928 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=5] CheckpointManager Save Finalize is syncing with other hosts...
I0422 22:56:14.436679 140465395164928 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=5] CheckpointManager Save Finalize is done on all hosts.
I0422 22:56:14.436872 140593315043136 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=5][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=5.
W0422 22:56:14.436996 140593315043136 checkpoint_manager.py:1452] Waiting for previous save to complete took 27.881920 seconds. If this number is high, consider checkpointing less frequently.
I0422 22:56:14.438516 140593315043136 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 9
I0422 22:56:14.440571 140593315043136 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_16_zarr3_false/checkpoints/9.
I0422 22:56:15.158603 140593315043136 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0422 22:56:15.158699 140593315043136 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
I0422 22:56:15.196341 140593315043136 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.038564s
I0422 22:56:15.196494 140593315043136 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 36.658 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.042079925537109375 s) (per-host)
I0422 22:56:15.196548 140593315043136 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.042143s (batch_requests_ready=0.001664s, total_serialization_initiated=0.040411s, others=0.000069s)
I0422 22:56:15.196634 140593315043136 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.046420s (all_items=0.000010s, per_item={'items': '0.00001025'}, temp_paths=0.046409)
I0422 22:56:15.197386 140593315043136 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.76 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_16_zarr3_false/checkpoints/9.
I0422 22:56:15.197742 140465395164928 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-22 23:16:15.197704
I0422 22:56:15.199666 140593315043136 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0422 22:56:15.199904 140445556389632 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0422 22:56:15.200038 140593315043136 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_16_zarr3_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776898546.555051, 'wait_for_prev_duration_secs': 27.881920099258423, 'time_between_consecutive_saves_sec': 24.508558750152588, 'checkpointer_blocking_start_time': 1776898574.4385564, 'checkpointer_blocking_duration_secs': 0.759333610534668, 'get_old_steps_start_time': 1776898575.1979094, 'get_old_steps_duration_secs': 2.4557113647460938e-05, 'checkpoint_manager_blocking_start_time': 1776898546.552923, 'checkpoint_manager_blocking_duration_secs': 28.64708375930786}
I0422 22:56:15.200213 140593315043136 checkpointing.py:408] Started an asynchronous checkpoint save for step 9
I0422 22:56:15.200259 140593315043136 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0422 22:56:21.401366 140467031238400 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_16_zarr3_false/checkpoints/9/items/array_metadatas/process_6
I0422 22:56:56.769727 140465395164928 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 37.957 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.61527419090271 s) (per-host)
I0422 22:56:56.769850 140465395164928 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.571992s.
I0422 22:57:06.429420 140465395164928 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 51.231544s.
I0422 22:57:06.429717 140445556389632 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0422 22:57:06.429831 140445556389632 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0422 22:57:06.429875 140445556389632 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0422 22:57:06.432536 140445556389632 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0422 22:57:06.432721 140593315043136 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9.
I0422 22:57:06.432873 140593315043136 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0422 22:57:06.433875 140593315043136 metric_logger.py:196] completed step: 9, seconds: 0.148, TFLOP/s/device: 92.050, Tokens/s/device: 13874.775, 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: Wed Apr 22 22:57:19 UTC 2026
EXIT_CODE=0