XPK Start: Tue Apr 21 06:54:13 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 06:54:38.798516: 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 06:54:39.006208 133878859167552 max_utils.py:273] Attempting to initialize the jax distributed system...
I0421 06:54:48.047540 133878859167552 distributed.py:149] Starting JAX distributed service on [::]:8482
I0421 06:54:48.049880 133878859167552 distributed.py:172] Connecting to JAX distributed service on mt-11-optimizer-offload-2f6oi-slice-job-0-0.mt-11-optimizer-offload-2f6oi:8482
I0421 06:54:49.262222 133878859167552 max_utils.py:284] Jax distributed system initialized!
I0421 06:54:55.462407 133878859167552 max_utils.py:800] System Information: Jax Version: 0.9.2
I0421 06:54:55.462513 133878859167552 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0421 06:54:55.462553 133878859167552 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 06:54:55.462592 133878859167552 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0421 06:54:56.154000 133878859167552 maxtext_utils.py:1565] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0421 06:54:56.154273 133878859167552 checkpointing.py:677] Setting up checkpoint logger...
I0421 06:54:56.154331 133878859167552 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True
I0421 06:54:56.154376 133878859167552 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0421 06:54:56.154725 133878859167552 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 0x79c262051220>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0421 06:54:59.069471 133878859167552 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0421 06:54:59.069720 133878859167552 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 0x79ae00591a30>}, handler_registry=None
I0421 06:54:59.069957 133878859167552 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x79ae00591a30>` 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 06:54:59.070006 133878859167552 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x79ae00595610>` 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 06:54:59.070043 133878859167552 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 0x79ae00591a30>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x79ae00591a30>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x79ae00595610>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x79ae00595610>}).
I0421 06:54:59.070376 133878859167552 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0421 06:54:59.070449 133878859167552 async_checkpointer.py:192] [process=4][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x79ad28115440> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0421 06:55:00.952029 133878859167552 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260421_061359/linen_xpk_main_20260421_061359_11_optimizer_offload_false/checkpoints
I0421 06:55:00.997264 133878859167552 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_061359/linen_xpk_main_20260421_061359_11_optimizer_offload_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x79ae00591c70>
I0421 06:55:00.997409 133878859167552 checkpointing.py:301] Checkpoint manager created!
I0421 06:55:01.923888 133878859167552 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0421 06:55:01.924006 133878859167552 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0421 06:55:02.305939 133878859167552 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0421 06:55:02.306032 133878859167552 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0421 06:55:02.322541 133878859167552 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0421 06:55:02.322599 133878859167552 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0421 06:55:02.346402 133878859167552 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0421 06:55:02.346472 133878859167552 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 06:55:02.363003 133878859167552 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0421 06:55:02.363063 133878859167552 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 06:55:02.379599 133878859167552 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0421 06:55:02.379673 133878859167552 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 06:55:02.404537 133878859167552 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0421 06:55:02.404607 133878859167552 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 06:55:02.425701 133878859167552 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0421 06:55:02.425769 133878859167552 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0421 06:55:02.635993 133878859167552 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0421 06:55:02.636099 133878859167552 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0421 06:55:04.061101 133878859167552 maxtext_utils.py:1668] params/params/decoder/decoder_norm/scale
Shape: float32[2048]
Logical: P('norm',)
Physical: (None,)
I0421 06:55:04.061225 133878859167552 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)
I0421 06:55:04.061279 133878859167552 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)
I0421 06:55:04.061339 133878859167552 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')
I0421 06:55:04.061392 133878859167552 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)
I0421 06:55:04.061430 133878859167552 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)
I0421 06:55:04.061485 133878859167552 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)
I0421 06:55:04.061537 133878859167552 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')
I0421 06:55:04.061577 133878859167552 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)
I0421 06:55:04.061613 133878859167552 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)
I0421 06:55:04.061673 133878859167552 maxtext_utils.py:1668] params/params/decoder/logits_dense/kernel
Shape: float32[2048,32000]
Logical: P('embed_vocab', 'vocab')
Physical: ('fsdp', None)
I0421 06:55:04.061725 133878859167552 maxtext_utils.py:1668] params/params/token_embedder/embedding
Shape: float32[32000,2048]
Logical: P('vocab', 'embed_vocab')
Physical: (None, 'fsdp')
I0421 06:55:04.559589 133878859167552 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0421 06:55:04.559699 133878859167552 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0421 06:55:04.575263 133878859167552 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0421 06:55:04.575322 133878859167552 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0421 06:55:15.180325 133878859167552 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.
I0421 06:55:15.181138 133878859167552 metric_logger.py:301] number parameters: 1.104 billion
I0421 06:55:27.059876 133878859167552 checkpointing.py:772] Waiting for step 0 to finish before checkpoint...
I0421 06:55:27.213465 133878859167552 checkpointing.py:776] Waited 0.15356826782226562 seconds for step 0 to finish before starting checkpointing.
I0421 06:55:27.215921 133878859167552 checkpoint_manager.py:2009] [process=4][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0421 06:55:27.217589 133878859167552 checkpoint_manager.py:1512] [process=4] Saving checkpoint at step 0
I0421 06:55:27.219201 133878859167552 event_tracking.py:70] [process=4] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_061359/linen_xpk_main_20260421_061359_11_optimizer_offload_false/checkpoints/0.
I0421 06:55:28.307028 133878859167552 signaling_client.py:364] Using JaxDistributedSignalingClient
I0421 06:55:28.307872 133878859167552 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0421 06:55:28.307930 133878859167552 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 06:55:28.582973 133878859167552 base_pytree_checkpoint_handler.py:154] [process=4][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.276019s
I0421 06:55:28.583145 133878859167552 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/blocking_gbytes_per_sec: 5.478 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28157520294189453 s) (per-host)
I0421 06:55:28.583198 133878859167552 base_pytree_checkpoint_handler.py:768] [process=4][thread=MainThread] Initiated Pytree async_save. Time taken: 0.281638s (batch_requests_ready=0.002265s, total_serialization_initiated=0.279302s, others=0.000071s)
I0421 06:55:28.583296 133878859167552 composite_checkpoint_handler.py:715] [process=4][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.286211s (all_items=0.000019s, per_item={'items': '0.00001907'}, temp_paths=0.286192)
I0421 06:55:28.584081 133878859167552 event_tracking.py:125] [process=4] [async] Finished blocking save in 1.37 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_061359/linen_xpk_main_20260421_061359_11_optimizer_offload_false/checkpoints/0.
I0421 06:55:28.584421 133749844997888 async_checkpointer.py:76] [process=4][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-21 07:15:28.584382
I0421 06:55:28.591428 133878859167552 checkpoint_manager.py:1560] [process=4][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0421 06:55:28.591739 133749798848256 async_checkpointer.py:280] [process=4][thread=save_finalize] Waiting for background save thread=async_save.
I0421 06:55:28.591901 133878859167552 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260421_061359/linen_xpk_main_20260421_061359_11_optimizer_offload_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776754527.2159028, 'wait_for_prev_duration_secs': 6.175041198730469e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776754527.2176278, 'checkpointer_blocking_duration_secs': 1.3668889999389648, 'get_old_steps_start_time': 1776754528.58454, 'get_old_steps_duration_secs': 3.0040740966796875e-05, 'checkpoint_manager_blocking_start_time': 1776754527.2140195, 'checkpoint_manager_blocking_duration_secs': 1.377842664718628}
I0421 06:55:28.592008 133878859167552 checkpointing.py:408] Started an asynchronous checkpoint save for step 0
I0421 06:55:28.592061 133878859167552 max_utils.py:750]
Memstats: After params initialized:
I0421 06:55:28.592109 133878859167552 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_16(process=4,(0,4,0,0))
I0421 06:55:28.592139 133878859167552 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_17(process=4,(1,4,0,0))
I0421 06:55:28.592164 133878859167552 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_20(process=4,(0,5,0,0))
I0421 06:55:28.592189 133878859167552 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_21(process=4,(1,5,0,0))
I0421 06:55:28.911127 133878859167552 metric_logger.py:196] completed step: 0, seconds: 11.879, TFLOP/s/device: 1.144, Tokens/s/device: 172.411, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0421 06:55:29.075968 133878859167552 metric_logger.py:196] completed step: 1, seconds: 1.850, TFLOP/s/device: 7.346, Tokens/s/device: 1107.280, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0421 06:55:29.471054 133878859167552 metric_logger.py:196] completed step: 2, seconds: 0.016, TFLOP/s/device: 833.106, Tokens/s/device: 125574.836, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28637.129
I0421 06:55:29.618401 133878859167552 metric_logger.py:196] completed step: 3, seconds: 0.397, TFLOP/s/device: 34.228, Tokens/s/device: 5159.171, total_weights: 65536, loss: 9.734, lm_loss: 9.734, perplexity: 16889.203
I0421 06:55:29.913552 133878859167552 metric_logger.py:196] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.852, Tokens/s/device: 13392.799, total_weights: 65536, loss: 9.277, lm_loss: 9.277, perplexity: 10694.614
I0421 06:55:29.919537 133878859167552 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.257, Tokens/s/device: 13905.958, total_weights: 65536, loss: 8.892, lm_loss: 8.892, perplexity: 7270.717
I0421 06:55:32.098593 2815 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0421 06:55:34.117584 133753544726272 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_061359/linen_xpk_main_20260421_061359_11_optimizer_offload_false/checkpoints/0/items/array_metadatas/process_4
I0421 06:55:53.445042 133878859167552 metric_logger.py:196] completed step: 6, seconds: 0.296, TFLOP/s/device: 45.964, Tokens/s/device: 6928.235, total_weights: 65536, loss: 8.592, lm_loss: 8.592, perplexity: 5390.759
I0421 06:55:53.592344 133878859167552 metric_logger.py:196] completed step: 7, seconds: 23.379, TFLOP/s/device: 0.581, Tokens/s/device: 87.602, total_weights: 65536, loss: 8.384, lm_loss: 8.384, perplexity: 4376.905
I0421 06:55:53.739872 133878859167552 metric_logger.py:196] completed step: 8, seconds: 0.153, TFLOP/s/device: 89.034, Tokens/s/device: 13420.180, total_weights: 65536, loss: 8.255, lm_loss: 8.255, perplexity: 3846.406
I0421 06:55:53.886502 133878859167552 checkpointing.py:772] Waiting for step 9 to finish before checkpoint...
I0421 06:55:53.887161 133878859167552 checkpointing.py:776] Waited 0.0006818771362304688 seconds for step 9 to finish before starting checkpointing.
I0421 06:55:53.889288 133878859167552 checkpoint_manager.py:2020] [process=4][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0421 06:56:06.259399 133749844997888 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/gbytes_per_sec: 41.615 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 37.95779728889465 s) (per-host)
I0421 06:56:06.259511 133749844997888 async_checkpointer.py:90] [process=4][thread=async_save] 3 Handler Commit operations completed. Time taken: 37.674466s.
I0421 06:56:14.849709 133749844997888 async_checkpointer.py:160] [process=4][thread=async_save] Background save thread done. Time taken: 46.264649s.
I0421 06:56:14.850000 133749798848256 async_checkpointer.py:288] [process=4][thread=save_finalize] Done with waiting for background save thread=async_save.
I0421 06:56:14.850122 133749798848256 async_checkpointer.py:298] [process=4][thread=save_finalize] No errors found in background save thread=async_save.
I0421 06:56:14.850178 133749798848256 checkpoint_manager.py:2137] [process=4][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0421 06:56:14.851860 133749798848256 checkpoint_manager.py:2146] [process=4][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0421 06:56:14.852025 133878859167552 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 06:56:14.852154 133878859167552 checkpoint_manager.py:1452] Waiting for previous save to complete took 20.962865 seconds. If this number is high, consider checkpointing less frequently.
I0421 06:56:14.853971 133878859167552 checkpoint_manager.py:1512] [process=4] Saving checkpoint at step 9
I0421 06:56:14.856122 133878859167552 event_tracking.py:70] [process=4] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_061359/linen_xpk_main_20260421_061359_11_optimizer_offload_false/checkpoints/9.
I0421 06:56:15.344208 133878859167552 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0421 06:56:15.344310 133878859167552 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 06:56:15.380064 133878859167552 base_pytree_checkpoint_handler.py:154] [process=4][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.036979s
I0421 06:56:15.380208 133878859167552 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/blocking_gbytes_per_sec: 38.145 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04044008255004883 s) (per-host)
I0421 06:56:15.380258 133878859167552 base_pytree_checkpoint_handler.py:768] [process=4][thread=MainThread] Initiated Pytree async_save. Time taken: 0.040499s (batch_requests_ready=0.001811s, total_serialization_initiated=0.038623s, others=0.000065s)
I0421 06:56:15.380346 133878859167552 composite_checkpoint_handler.py:715] [process=4][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.044630s (all_items=0.000015s, per_item={'items': '0.00001454'}, temp_paths=0.044615)
I0421 06:56:15.381066 133878859167552 event_tracking.py:125] [process=4] [async] Finished blocking save in 0.53 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_061359/linen_xpk_main_20260421_061359_11_optimizer_offload_false/checkpoints/9.
I0421 06:56:15.381369 133749798848256 async_checkpointer.py:76] [process=4][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-21 07:16:15.381335
I0421 06:56:15.385979 133878859167552 checkpoint_manager.py:1560] [process=4][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0421 06:56:15.386291 133749830993664 async_checkpointer.py:280] [process=4][thread=save_finalize] Waiting for background save thread=async_save.
I0421 06:56:15.386458 133878859167552 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260421_061359/linen_xpk_main_20260421_061359_11_optimizer_offload_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776754553.8892596, 'wait_for_prev_duration_secs': 20.962865114212036, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776754574.854011, 'checkpointer_blocking_duration_secs': 0.5275049209594727, 'get_old_steps_start_time': 1776754575.3815396, 'get_old_steps_duration_secs': 3.695487976074219e-05, 'checkpoint_manager_blocking_start_time': 1776754553.887396, 'checkpoint_manager_blocking_duration_secs': 21.499026775360107}
I0421 06:56:15.386574 133878859167552 checkpointing.py:408] Started an asynchronous checkpoint save for step 9
I0421 06:56:15.386620 133878859167552 checkpoint_manager.py:2020] [process=4][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0421 06:56:20.921274 133753544726272 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_061359/linen_xpk_main_20260421_061359_11_optimizer_offload_false/checkpoints/9/items/array_metadatas/process_4
I0421 06:56:58.240750 133749798848256 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/gbytes_per_sec: 36.820 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.90094232559204 s) (per-host)
I0421 06:56:58.240877 133749798848256 async_checkpointer.py:90] [process=4][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.859395s.
I0421 06:57:05.638494 133749798848256 async_checkpointer.py:160] [process=4][thread=async_save] Background save thread done. Time taken: 50.256993s.
I0421 06:57:05.638803 133749830993664 async_checkpointer.py:288] [process=4][thread=save_finalize] Done with waiting for background save thread=async_save.
I0421 06:57:05.638948 133749830993664 async_checkpointer.py:298] [process=4][thread=save_finalize] No errors found in background save thread=async_save.
I0421 06:57:05.639012 133749830993664 checkpoint_manager.py:2137] [process=4][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0421 06:57:05.640511 133749830993664 checkpoint_manager.py:2146] [process=4][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0421 06:57:05.640693 133878859167552 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 06:57:05.640847 133878859167552 checkpoint_manager.py:2009] [process=4][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0421 06:57:05.641925 133878859167552 metric_logger.py:196] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.260, Tokens/s/device: 13906.430, total_weights: 65536, loss: 8.179, lm_loss: 8.179, perplexity: 3564.635
Per train step:
Total TFLOPs: 13.59
split as 93.93% learnable weight flops and 6.07% attention flops
XPK End: Tue Apr 21 06:57:13 UTC 2026
EXIT_CODE=0