XPK Start: Tue Apr 21 15:14:22 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.
2026-04-21 15:14:46.967078: 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)
I0421 15:14:47.178781 139631339927360 max_utils.py:273] Attempting to initialize the jax distributed system...
I0421 15:14:56.221004 139631339927360 distributed.py:149] Starting JAX distributed service on [::]:8482
I0421 15:14:56.223536 139631339927360 distributed.py:172] Connecting to JAX distributed service on mt-09-pdb-lt-1-xf1ft-slice-job-0-0.mt-09-pdb-lt-1-xf1ft:8482
I0421 15:14:57.202886 139631339927360 max_utils.py:284] Jax distributed system initialized!
I0421 15:15:02.571235 139631339927360 max_utils.py:800] System Information: Jax Version: 0.9.2
I0421 15:15:02.571345 139631339927360 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0421 15:15:02.571387 139631339927360 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
I0421 15:15:02.571424 139631339927360 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0421 15:15:03.263254 139631339927360 maxtext_utils.py:1565] Num_devices: 32, shape (1, 1, 1, 8, 1, 1, 1, 1, 4, 1, 1, 1, 1)
I0421 15:15:03.263543 139631339927360 checkpointing.py:677] Setting up checkpoint logger...
I0421 15:15:03.263600 139631339927360 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True
I0421 15:15:03.263659 139631339927360 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0421 15:15:03.263998 139631339927360 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 0x7efdbca4cfb0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0421 15:15:06.569195 139631339927360 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0421 15:15:06.569431 139631339927360 checkpoint_manager.py:708] [process=4][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7eea503196a0>}, handler_registry=None
I0421 15:15:06.569681 139631339927360 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7eea503196a0>` 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`.
I0421 15:15:06.569732 139631339927360 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7eea5031aae0>` 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`.
I0421 15:15:06.569768 139631339927360 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 0x7eea503196a0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7eea503196a0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7eea5031aae0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7eea5031aae0>}).
I0421 15:15:06.570081 139631339927360 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0421 15:15:06.570152 139631339927360 async_checkpointer.py:192] [process=4][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7eea187e5620> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0421 15:15:07.312528 139631339927360 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_09_pdb_lt_1/checkpoints
I0421 15:15:07.733527 139631339927360 checkpoint_manager.py:929] [process=4][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=10), 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_20260421_144122/linen_xpk_main_20260421_144122_09_pdb_lt_1/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7eea50319a30>
I0421 15:15:07.733734 139631339927360 checkpointing.py:301] Checkpoint manager created!
I0421 15:15:08.663730 139631339927360 nnx_wrappers.py:437] Unknown Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0421 15:15:08.663847 139631339927360 nnx_wrappers.py:437] Unknown Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, 'tensor').
I0421 15:15:09.043134 139631339927360 attentions.py:1088] attentions/inputs_q Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0421 15:15:09.043226 139631339927360 attentions.py:1088] attentions/inputs_q Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, 'tensor').
I0421 15:15:09.060023 139631339927360 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0421 15:15:09.060086 139631339927360 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, 'tensor').
I0421 15:15:09.083886 139631339927360 attentions.py:1154] attentions/query Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0421 15:15:09.083960 139631339927360 attentions.py:1154] attentions/query Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, 'tensor', None).
I0421 15:15:09.100483 139631339927360 attentions.py:1155] attentions/key Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0421 15:15:09.100544 139631339927360 attentions.py:1155] attentions/key Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, 'tensor', None).
I0421 15:15:09.117084 139631339927360 attentions.py:1156] attentions/value Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0421 15:15:09.117145 139631339927360 attentions.py:1156] attentions/value Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, 'tensor', None).
I0421 15:15:09.142359 139631339927360 attentions.py:1198] attentions/out Logical: bfloat16[8,2048,16,128]..................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0421 15:15:09.142432 139631339927360 attentions.py:1198] attentions/out Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, 'tensor', None).
I0421 15:15:09.163786 139631339927360 linears.py:525] linears/x Logical: bfloat16[8,2048,7168]....................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0421 15:15:09.163850 139631339927360 linears.py:525] linears/x Physical: bfloat16[8,2048,7168]....................................... ('fsdp', None, 'tensor').
I0421 15:15:09.372549 139631339927360 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0421 15:15:09.372665 139631339927360 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint.
fsdp: 8
tensor: 4
I0421 15:15:10.803327 139631339927360 maxtext_utils.py:1668] params/params/decoder/decoder_norm/scale
Shape: float32[2048]
Logical: P('norm',)
Physical: ('tensor',)
I0421 15:15:10.803454 139631339927360 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, 'tensor')
I0421 15:15:10.803508 139631339927360 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, 'tensor')
I0421 15:15:10.803574 139631339927360 maxtext_utils.py:1668] params/params/decoder/layers/mlp/wo/kernel
Shape: float32[7168,16,2048]
Logical: P('mlp', 'layers', 'embed')
Physical: ('tensor', None, 'fsdp')
I0421 15:15:10.803623 139631339927360 maxtext_utils.py:1668] params/params/decoder/layers/post_self_attention_layer_norm/scale
Shape: float32[2048,16]
Logical: P('norm', 'layers')
Physical: ('tensor', None)
I0421 15:15:10.803704 139631339927360 maxtext_utils.py:1668] params/params/decoder/layers/pre_self_attention_layer_norm/scale
Shape: float32[2048,16]
Logical: P('norm', 'layers')
Physical: ('tensor', None)
I0421 15:15:10.803763 139631339927360 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, 'tensor', None)
I0421 15:15:10.803816 139631339927360 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: ('tensor', None, None, 'fsdp')
I0421 15:15:10.803856 139631339927360 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, 'tensor', None)
I0421 15:15:10.803893 139631339927360 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, 'tensor', None)
I0421 15:15:10.803940 139631339927360 maxtext_utils.py:1668] params/params/decoder/logits_dense/kernel
Shape: float32[2048,32000]
Logical: P('embed_vocab', 'vocab')
Physical: ('fsdp', 'tensor')
I0421 15:15:10.803988 139631339927360 maxtext_utils.py:1668] params/params/token_embedder/embedding
Shape: float32[32000,2048]
Logical: P('vocab', 'embed_vocab')
Physical: ('tensor', 'fsdp')
I0421 15:15:11.296269 139631339927360 train.py:155] train/xent Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length').
I0421 15:15:11.296362 139631339927360 train.py:155] train/xent Physical: float32[8,2048]............................................. ('fsdp', None).
I0421 15:15:11.312002 139631339927360 train.py:162] train/z_loss Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length').
I0421 15:15:11.312065 139631339927360 train.py:162] train/z_loss Physical: float32[8,2048]............................................. ('fsdp', None).
I0421 15:15:26.355128 139631339927360 max_utils.py:791] Total memory size: 0.9 GB, Output size: 0.4 GB, Temp size: 0.5 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB.
I0421 15:15:26.355966 139631339927360 metric_logger.py:301] number parameters: 1.104 billion
I0421 15:15:27.508134 139631339927360 checkpointing.py:772] Waiting for step 0 to finish before checkpoint...
I0421 15:15:42.457341 139631339927360 checkpointing.py:776] Waited 14.949182748794556 seconds for step 0 to finish before starting checkpointing.
I0421 15:15:42.460049 139631339927360 checkpoint_manager.py:2009] [process=4][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0421 15:15:42.462111 139631339927360 checkpoint_manager.py:1512] [process=4] Saving checkpoint at step 0
I0421 15:15:42.463805 139631339927360 event_tracking.py:70] [process=4] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_09_pdb_lt_1/checkpoints/0.
I0421 15:15:42.757818 139631339927360 signaling_client.py:364] Using JaxDistributedSignalingClient
I0421 15:15:42.758766 139631339927360 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0421 15:15:42.758822 139631339927360 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
I0421 15:15:43.026020 139631339927360 base_pytree_checkpoint_handler.py:154] [process=4][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.268273s
I0421 15:15:43.026200 139631339927360 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/blocking_gbytes_per_sec: 5.631 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2739222049713135 s) (per-host)
I0421 15:15:43.026265 139631339927360 base_pytree_checkpoint_handler.py:768] [process=4][thread=MainThread] Initiated Pytree async_save. Time taken: 0.273998s (batch_requests_ready=0.002226s, total_serialization_initiated=0.271688s, others=0.000084s)
I0421 15:15:43.026360 139631339927360 composite_checkpoint_handler.py:715] [process=4][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.278272s (all_items=0.000018s, per_item={'items': '0.00001764'}, temp_paths=0.278255)
I0421 15:15:43.027190 139631339927360 event_tracking.py:125] [process=4] [async] Finished blocking save in 0.56 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_09_pdb_lt_1/checkpoints/0.
I0421 15:15:43.027489 139506928563968 async_checkpointer.py:76] [process=4][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-21 15:35:43.027456
I0421 15:15:43.032997 139631339927360 checkpoint_manager.py:1560] [process=4][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0421 15:15:43.033289 139506426566400 async_checkpointer.py:280] [process=4][thread=save_finalize] Waiting for background save thread=async_save.
I0421 15:15:43.033448 139631339927360 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_09_pdb_lt_1/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776784542.4600253, 'wait_for_prev_duration_secs': 0.00010895729064941406, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776784542.46215, 'checkpointer_blocking_duration_secs': 0.5655016899108887, 'get_old_steps_start_time': 1776784543.0276778, 'get_old_steps_duration_secs': 2.9802322387695312e-05, 'checkpoint_manager_blocking_start_time': 1776784542.4580767, 'checkpoint_manager_blocking_duration_secs': 0.5753333568572998}
I0421 15:15:43.033562 139631339927360 checkpointing.py:408] Started an asynchronous checkpoint save for step 0
I0421 15:15:43.033613 139631339927360 max_utils.py:750]
Memstats: After params initialized:
I0421 15:15:43.033676 139631339927360 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_16(process=4,(0,4,0,0))
I0421 15:15:43.033712 139631339927360 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_17(process=4,(1,4,0,0))
I0421 15:15:43.033741 139631339927360 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_20(process=4,(0,5,0,0))
I0421 15:15:43.033769 139631339927360 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_21(process=4,(1,5,0,0))
I0421 15:15:43.350271 139631339927360 metric_logger.py:196] completed step: 0, seconds: 1.152, TFLOP/s/device: 2.948, Tokens/s/device: 444.425, total_weights: 16384, loss: 10.862, lm_loss: 10.862, perplexity: 52153.723
I0421 15:15:43.523830 139631339927360 metric_logger.py:196] completed step: 1, seconds: 15.841, TFLOP/s/device: 0.214, Tokens/s/device: 32.322, total_weights: 16384, loss: 10.862, lm_loss: 10.862, perplexity: 52153.723
I0421 15:15:43.941349 139631339927360 metric_logger.py:196] completed step: 2, seconds: 0.116, TFLOP/s/device: 29.401, Tokens/s/device: 4431.711, total_weights: 16384, loss: 9.763, lm_loss: 9.763, perplexity: 17373.129
I0421 15:15:43.999881 139631339927360 metric_logger.py:196] completed step: 3, seconds: 0.418, TFLOP/s/device: 8.126, Tokens/s/device: 1224.845, total_weights: 16384, loss: 8.823, lm_loss: 8.823, perplexity: 6791.817
I0421 15:15:44.117049 139631339927360 metric_logger.py:196] completed step: 4, seconds: 0.064, TFLOP/s/device: 53.393, Tokens/s/device: 8048.037, total_weights: 16384, loss: 7.947, lm_loss: 7.947, perplexity: 2828.417
I0421 15:15:44.123127 139631339927360 metric_logger.py:196] completed step: 5, seconds: 0.058, TFLOP/s/device: 58.339, Tokens/s/device: 8793.474, total_weights: 16384, loss: 7.212, lm_loss: 7.212, perplexity: 1355.339
I0421 15:15:46.536275 2470 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0421 15:15:48.914782 139506434959104 array_metadata_store.py:203] [process=4][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_09_pdb_lt_1/checkpoints/0/items/array_metadatas/process_4
I0421 15:15:57.736656 139631339927360 metric_logger.py:196] completed step: 6, seconds: 0.118, TFLOP/s/device: 28.778, Tokens/s/device: 4337.807, total_weights: 16384, loss: 6.652, lm_loss: 6.652, perplexity: 774.659
I0421 15:15:57.795145 139631339927360 metric_logger.py:196] completed step: 7, seconds: 13.556, TFLOP/s/device: 0.251, Tokens/s/device: 37.769, total_weights: 16384, loss: 6.269, lm_loss: 6.269, perplexity: 527.696
I0421 15:15:57.853551 139631339927360 metric_logger.py:196] completed step: 8, seconds: 0.063, TFLOP/s/device: 53.794, Tokens/s/device: 8108.451, total_weights: 16384, loss: 6.031, lm_loss: 6.031, perplexity: 416.165
I0421 15:15:57.911215 139631339927360 checkpointing.py:772] Waiting for step 9 to finish before checkpoint...
I0421 15:15:57.911873 139631339927360 checkpointing.py:776] Waited 0.0006740093231201172 seconds for step 9 to finish before starting checkpointing.
I0421 15:15:57.915111 139631339927360 checkpoint_manager.py:2020] [process=4][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0421 15:16:20.093582 139506928563968 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/gbytes_per_sec: 42.302 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 37.34128379821777 s) (per-host)
I0421 15:16:20.093698 139506928563968 async_checkpointer.py:90] [process=4][thread=async_save] 3 Handler Commit operations completed. Time taken: 37.066095s.
I0421 15:16:27.784551 139506928563968 async_checkpointer.py:160] [process=4][thread=async_save] Background save thread done. Time taken: 44.756925s.
I0421 15:16:27.784880 139506426566400 async_checkpointer.py:288] [process=4][thread=save_finalize] Done with waiting for background save thread=async_save.
I0421 15:16:27.784999 139506426566400 async_checkpointer.py:298] [process=4][thread=save_finalize] No errors found in background save thread=async_save.
I0421 15:16:27.785051 139506426566400 checkpoint_manager.py:2137] [process=4][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0421 15:16:27.786529 139506426566400 checkpoint_manager.py:2146] [process=4][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0421 15:16:27.786705 139631339927360 checkpoint_manager.py:2032] [process=4][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0421 15:16:27.786837 139631339927360 checkpoint_manager.py:1452] Waiting for previous save to complete took 29.871726 seconds. If this number is high, consider checkpointing less frequently.
I0421 15:16:27.788705 139631339927360 checkpoint_manager.py:1512] [process=4] Saving checkpoint at step 9
I0421 15:16:27.790837 139631339927360 event_tracking.py:70] [process=4] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_09_pdb_lt_1/checkpoints/9.
I0421 15:16:28.505238 139631339927360 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0421 15:16:28.505328 139631339927360 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
I0421 15:16:28.530581 139631339927360 base_pytree_checkpoint_handler.py:154] [process=4][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.026508s
I0421 15:16:28.530740 139631339927360 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/blocking_gbytes_per_sec: 51.540 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.02992987632751465 s) (per-host)
I0421 15:16:28.530801 139631339927360 base_pytree_checkpoint_handler.py:768] [process=4][thread=MainThread] Initiated Pytree async_save. Time taken: 0.029997s (batch_requests_ready=0.001779s, total_serialization_initiated=0.028141s, others=0.000078s)
I0421 15:16:28.530901 139631339927360 composite_checkpoint_handler.py:715] [process=4][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.034127s (all_items=0.000020s, per_item={'items': '0.00001979'}, temp_paths=0.034108)
I0421 15:16:28.531583 139631339927360 event_tracking.py:125] [process=4] [async] Finished blocking save in 0.74 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_09_pdb_lt_1/checkpoints/9.
I0421 15:16:28.531929 139506426566400 async_checkpointer.py:76] [process=4][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-21 15:36:28.531893
I0421 15:16:28.548703 139631339927360 checkpoint_manager.py:1560] [process=4][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0421 15:16:28.549011 139504832739072 async_checkpointer.py:280] [process=4][thread=save_finalize] Waiting for background save thread=async_save.
I0421 15:16:28.549172 139631339927360 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_09_pdb_lt_1/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776784557.9150817, 'wait_for_prev_duration_secs': 29.87172555923462, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776784587.7887437, 'checkpointer_blocking_duration_secs': 0.7433309555053711, 'get_old_steps_start_time': 1776784588.5320992, 'get_old_steps_duration_secs': 3.170967102050781e-05, 'checkpoint_manager_blocking_start_time': 1776784557.912096, 'checkpoint_manager_blocking_duration_secs': 30.637040853500366}
I0421 15:16:28.549278 139631339927360 checkpointing.py:408] Started an asynchronous checkpoint save for step 9
I0421 15:16:28.549320 139631339927360 checkpoint_manager.py:2020] [process=4][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0421 15:16:33.637539 139510243378944 array_metadata_store.py:203] [process=4][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_09_pdb_lt_1/checkpoints/9/items/array_metadatas/process_4
I0421 15:17:09.132832 139506426566400 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/gbytes_per_sec: 38.876 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 40.63198208808899 s) (per-host)
I0421 15:17:09.132961 139506426566400 async_checkpointer.py:90] [process=4][thread=async_save] 3 Handler Commit operations completed. Time taken: 40.600921s.
I0421 15:17:17.534115 139506426566400 async_checkpointer.py:160] [process=4][thread=async_save] Background save thread done. Time taken: 49.002060s.
I0421 15:17:17.534455 139504832739072 async_checkpointer.py:288] [process=4][thread=save_finalize] Done with waiting for background save thread=async_save.
I0421 15:17:17.534606 139504832739072 async_checkpointer.py:298] [process=4][thread=save_finalize] No errors found in background save thread=async_save.
I0421 15:17:17.534678 139504832739072 checkpoint_manager.py:2137] [process=4][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0421 15:17:17.539819 139504832739072 checkpoint_manager.py:2146] [process=4][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0421 15:17:17.540006 139631339927360 checkpoint_manager.py:2032] [process=4][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9.
I0421 15:17:17.540152 139631339927360 checkpoint_manager.py:2009] [process=4][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0421 15:17:17.541154 139631339927360 metric_logger.py:196] completed step: 9, seconds: 0.058, TFLOP/s/device: 58.286, Tokens/s/device: 8785.477, total_weights: 16384, loss: 5.892, lm_loss: 5.892, perplexity: 361.955
Per train step:
Total TFLOPs: 3.40
split as 93.93% learnable weight flops and 6.07% attention flops
XPK End: Tue Apr 21 15:17:27 UTC 2026
EXIT_CODE=0