MaxView

XPK Start: Mon Apr 20 08:27:31 UTC 2026
PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used.
2026-04-20 08:27:55.422737: 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)
I0420 08:27:55.601756 132663849809728 max_utils.py:273] Attempting to initialize the jax distributed system...
I0420 08:28:04.643150 132663849809728 distributed.py:149] Starting JAX distributed service on [::]:8482
I0420 08:28:04.645517 132663849809728 distributed.py:172] Connecting to JAX distributed service on mt-06-grad-accum-vt36x-slice-job-0-0.mt-06-grad-accum-vt36x:8482
I0420 08:28:06.301907 132663849809728 max_utils.py:284] Jax distributed system initialized!
I0420 08:28:12.423013 132663849809728 max_utils.py:800] System Information: Jax Version: 0.9.2
I0420 08:28:12.423114 132663849809728 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0420 08:28:12.423155 132663849809728 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
I0420 08:28:12.423190 132663849809728 train_utils.py:378] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0420 08:28:13.118798 132663849809728 maxtext_utils.py:1718] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0420 08:28:13.119385 132663849809728 maxtext_utils.py:1718] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0420 08:28:13.119566 132663849809728 checkpointing.py:688] Setting up checkpoint logger...
I0420 08:28:13.119615 132663849809728 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True
I0420 08:28:13.119658 132663849809728 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0420 08:28:13.119988 132663849809728 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 0x78a7a4f65280>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0420 08:28:16.054867 132663849809728 checkpointing.py:266] Enabling policy for fixed interval checkpointing.
I0420 08:28:16.055065 132663849809728 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 0x789324623020>}, handler_registry=None
I0420 08:28:16.055325 132663849809728 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x789324623020>` 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`.
I0420 08:28:16.055390 132663849809728 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x789324626f00>` 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`.
I0420 08:28:16.055440 132663849809728 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 0x789324623020>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x789324623020>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x789324626f00>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x789324626f00>}).
I0420 08:28:16.055781 132663849809728 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0420 08:28:16.055871 132663849809728 async_checkpointer.py:192] [process=4][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7892ac3e02c0> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0420 08:28:17.182577 132663849809728 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533/linen_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533_06_grad_accum/checkpoints
I0420 08:28:17.198673 132663849809728 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_feat_nnx_trainstate_and_training_loop_20260420_081533/linen_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533_06_grad_accum/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x789324623860>
I0420 08:28:17.198793 132663849809728 checkpointing.py:302] Checkpoint manager created!
I0420 08:28:18.916096 132663849809728 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0420 08:28:18.916196 132663849809728 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0420 08:28:19.299558 132663849809728 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0420 08:28:19.299643 132663849809728 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0420 08:28:19.315920 132663849809728 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0420 08:28:19.315981 132663849809728 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0420 08:28:19.340574 132663849809728 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0420 08:28:19.340639 132663849809728 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0420 08:28:19.356900 132663849809728 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0420 08:28:19.356957 132663849809728 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0420 08:28:19.373228 132663849809728 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0420 08:28:19.373285 132663849809728 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0420 08:28:19.398021 132663849809728 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0420 08:28:19.398089 132663849809728 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0420 08:28:19.418932 132663849809728 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0420 08:28:19.419003 132663849809728 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0420 08:28:19.635811 132663849809728 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint
I0420 08:28:19.635918 132663849809728 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0420 08:28:21.059119 132663849809728 maxtext_utils.py:1821]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  (None,)
I0420 08:28:21.059241 132663849809728 maxtext_utils.py:1821]  params/params/decoder/layers/mlp/wi_0/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0420 08:28:21.059292 132663849809728 maxtext_utils.py:1821]  params/params/decoder/layers/mlp/wi_1/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0420 08:28:21.059449 132663849809728 maxtext_utils.py:1821]  params/params/decoder/layers/mlp/wo/kernel
    Shape:     float32[7168,16,2048]
    Logical:   P('mlp', 'layers', 'embed')
    Physical:  (None, None, 'fsdp')
I0420 08:28:21.059516 132663849809728 maxtext_utils.py:1821]  params/params/decoder/layers/post_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0420 08:28:21.059559 132663849809728 maxtext_utils.py:1821]  params/params/decoder/layers/pre_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0420 08:28:21.059616 132663849809728 maxtext_utils.py:1821]  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)
I0420 08:28:21.059670 132663849809728 maxtext_utils.py:1821]  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')
I0420 08:28:21.059710 132663849809728 maxtext_utils.py:1821]  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)
I0420 08:28:21.059746 132663849809728 maxtext_utils.py:1821]  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)
I0420 08:28:21.059793 132663849809728 maxtext_utils.py:1821]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)

I0420 08:28:21.059839 132663849809728 maxtext_utils.py:1821]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')
I0420 08:28:21.083910 132663849809728 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[2048]............................................... Unknown.
I0420 08:28:21.083977 132663849809728 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[2048]............................................... (None,).
I0420 08:28:21.099008 132663849809728 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[2048,16,7168]....................................... Unknown.
I0420 08:28:21.099070 132663849809728 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[2048,16,7168]....................................... ('fsdp', None, None).
I0420 08:28:21.128280 132663849809728 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[7168,16,2048]....................................... Unknown.
I0420 08:28:21.128354 132663849809728 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[7168,16,2048]....................................... (None, None, 'fsdp').
I0420 08:28:21.142918 132663849809728 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[2048,16]............................................ Unknown.
I0420 08:28:21.142973 132663849809728 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[2048,16]............................................ (None, None).
I0420 08:28:21.172410 132663849809728 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[2048,16,16,128]..................................... Unknown.
I0420 08:28:21.172478 132663849809728 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[2048,16,16,128]..................................... ('fsdp', None, None, None).
I0420 08:28:21.187257 132663849809728 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[16,16,128,2048]..................................... Unknown.
I0420 08:28:21.187315 132663849809728 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[16,16,128,2048]..................................... (None, None, None, 'fsdp').
I0420 08:28:21.231003 132663849809728 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[2048,32000]......................................... Unknown.
I0420 08:28:21.231072 132663849809728 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[2048,32000]......................................... ('fsdp', None).
I0420 08:28:21.245771 132663849809728 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[32000,2048]......................................... Unknown.
I0420 08:28:21.245833 132663849809728 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[32000,2048]......................................... (None, 'fsdp').
I0420 08:28:21.909198 132663849809728 train.py:157] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0420 08:28:21.909290 132663849809728 train.py:157] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0420 08:28:21.924856 132663849809728 train.py:164] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0420 08:28:21.924919 132663849809728 train.py:164] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0420 08:28:33.116931 132663849809728 max_utils.py:791] Total memory size: 1.7 GB, Output size: 0.4 GB, Temp size: 1.3 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB.
I0420 08:28:33.117744 132663849809728 metric_logger.py:301] number parameters: 1.104 billion
I0420 08:28:35.009242 132663849809728 checkpointing.py:794] Waiting for step 0 to finish before checkpoint...
I0420 08:28:45.985944 132663849809728 checkpointing.py:798] Waited 10.976680517196655 seconds for step 0 to finish before starting checkpointing.
I0420 08:28:45.988393 132663849809728 checkpoint_manager.py:2009] [process=4][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0420 08:28:45.990073 132663849809728 checkpoint_manager.py:1512] [process=4] Saving checkpoint at step 0
I0420 08:28:45.991802 132663849809728 event_tracking.py:70] [process=4] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533/linen_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533_06_grad_accum/checkpoints/0.
I0420 08:28:46.724975 132663849809728 signaling_client.py:364] Using JaxDistributedSignalingClient
I0420 08:28:46.725813 132663849809728 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0420 08:28:46.725868 132663849809728 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
I0420 08:28:47.000108 132663849809728 base_pytree_checkpoint_handler.py:154] [process=4][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.275213s
I0420 08:28:47.000281 132663849809728 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/blocking_gbytes_per_sec: 5.496 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28067970275878906 s) (per-host)
I0420 08:28:47.000347 132663849809728 base_pytree_checkpoint_handler.py:768] [process=4][thread=MainThread] Initiated Pytree async_save. Time taken: 0.280745s (batch_requests_ready=0.002309s, total_serialization_initiated=0.278362s, others=0.000074s)
I0420 08:28:47.000438 132663849809728 composite_checkpoint_handler.py:715] [process=4][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.284836s (all_items=0.000017s, per_item={'items': '0.00001717'}, temp_paths=0.284818)
I0420 08:28:47.001317 132663849809728 event_tracking.py:125] [process=4] [async] Finished blocking save in 1.01 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533/linen_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533_06_grad_accum/checkpoints/0.
I0420 08:28:47.001686 132534293751552 async_checkpointer.py:76] [process=4][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-20 08:48:47.001649
I0420 08:28:47.014911 132663849809728 checkpoint_manager.py:1560] [process=4][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0420 08:28:47.015212 132534268573440 async_checkpointer.py:280] [process=4][thread=save_finalize] Waiting for background save thread=async_save.
I0420 08:28:47.015392 132663849809728 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533/linen_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533_06_grad_accum/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776673725.988376, 'wait_for_prev_duration_secs': 6.175041198730469e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776673725.990156, 'checkpointer_blocking_duration_secs': 1.0116808414459229, 'get_old_steps_start_time': 1776673727.0018632, 'get_old_steps_duration_secs': 2.9802322387695312e-05, 'checkpoint_manager_blocking_start_time': 1776673725.9863994, 'checkpoint_manager_blocking_duration_secs': 1.0289537906646729}
I0420 08:28:47.015494 132663849809728 checkpointing.py:409] Started an asynchronous checkpoint save for step 0
I0420 08:28:47.015543 132663849809728 max_utils.py:750] 
Memstats: After params initialized:
I0420 08:28:47.015590 132663849809728 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_16(process=4,(0,4,0,0))
I0420 08:28:47.015620 132663849809728 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_17(process=4,(1,4,0,0))
I0420 08:28:47.015651 132663849809728 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_20(process=4,(0,5,0,0))
I0420 08:28:47.015675 132663849809728 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_21(process=4,(1,5,0,0))
I0420 08:28:47.327120 132663849809728 metric_logger.py:196] completed step: 0, seconds: 1.891, TFLOP/s/device: 28.735, Tokens/s/device: 4331.195, total_weights: 262144, loss: 10.877, lm_loss: 10.877, perplexity: 52959.059
I0420 08:28:47.946994 132663849809728 metric_logger.py:196] completed step: 1, seconds: 12.316, TFLOP/s/device: 4.413, Tokens/s/device: 665.132, total_weights: 262144, loss: 10.877, lm_loss: 10.877, perplexity: 52959.059
I0420 08:28:48.525857 132663849809728 metric_logger.py:196] completed step: 2, seconds: 0.041, TFLOP/s/device: 1311.752, Tokens/s/device: 197721.568, total_weights: 262144, loss: 10.563, lm_loss: 10.563, perplexity: 38662.707
I0420 08:28:49.104367 132663849809728 metric_logger.py:196] completed step: 3, seconds: 0.584, TFLOP/s/device: 93.003, Tokens/s/device: 14018.492, total_weights: 262144, loss: 10.272, lm_loss: 10.272, perplexity: 28909.668
I0420 08:28:50.261680 132663849809728 metric_logger.py:196] completed step: 4, seconds: 0.579, TFLOP/s/device: 93.907, Tokens/s/device: 14154.644, total_weights: 262144, loss: 10.022, lm_loss: 10.022, perplexity: 22524.992
I0420 08:28:50.267362 132663849809728 metric_logger.py:196] completed step: 5, seconds: 0.578, TFLOP/s/device: 93.959, Tokens/s/device: 14162.474, total_weights: 262144, loss: 9.820, lm_loss: 9.820, perplexity: 18401.865
I0420 08:28:50.315732    2547 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0420 08:28:52.346240 132534276966144 array_metadata_store.py:203] [process=4][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533/linen_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533_06_grad_accum/checkpoints/0/items/array_metadatas/process_4
I0420 08:29:24.968196 132534293751552 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/gbytes_per_sec: 41.298 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 38.248576641082764 s) (per-host)
I0420 08:29:24.968296 132534293751552 async_checkpointer.py:90] [process=4][thread=async_save] 3 Handler Commit operations completed. Time taken: 37.966497s.
I0420 08:29:32.886178 132534293751552 async_checkpointer.py:160] [process=4][thread=async_save] Background save thread done. Time taken: 45.884362s.
I0420 08:29:32.886518 132534268573440 async_checkpointer.py:288] [process=4][thread=save_finalize] Done with waiting for background save thread=async_save.
I0420 08:29:32.886660 132534268573440 async_checkpointer.py:298] [process=4][thread=save_finalize] No errors found in background save thread=async_save.
I0420 08:29:32.886713 132534268573440 checkpoint_manager.py:2137] [process=4][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0420 08:29:32.889253 132534268573440 checkpoint_manager.py:2146] [process=4][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0420 08:29:36.338177 132663849809728 metric_logger.py:196] completed step: 6, seconds: 1.158, TFLOP/s/device: 46.943, Tokens/s/device: 7075.739, total_weights: 262144, loss: 9.667, lm_loss: 9.667, perplexity: 15787.604
I0420 08:29:36.916832 132663849809728 metric_logger.py:196] completed step: 7, seconds: 45.493, TFLOP/s/device: 1.195, Tokens/s/device: 180.071, total_weights: 262144, loss: 9.561, lm_loss: 9.561, perplexity: 14203.827
I0420 08:29:37.495472 132663849809728 metric_logger.py:196] completed step: 8, seconds: 0.583, TFLOP/s/device: 93.226, Tokens/s/device: 14051.988, total_weights: 262144, loss: 9.496, lm_loss: 9.496, perplexity: 13302.920
I0420 08:29:38.073600 132663849809728 checkpointing.py:794] Waiting for step 9 to finish before checkpoint...
I0420 08:29:38.074395 132663849809728 checkpointing.py:798] Waited 0.0008141994476318359 seconds for step 9 to finish before starting checkpointing.
I0420 08:29:38.076312 132663849809728 checkpoint_manager.py:2009] [process=4][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0420 08:29:38.078305 132663849809728 checkpoint_manager.py:1512] [process=4] Saving checkpoint at step 9
I0420 08:29:38.080033 132663849809728 event_tracking.py:70] [process=4] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533/linen_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533_06_grad_accum/checkpoints/9.
I0420 08:29:38.366047 132663849809728 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0420 08:29:38.366135 132663849809728 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
I0420 08:29:38.399658 132663849809728 base_pytree_checkpoint_handler.py:154] [process=4][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.034437s
I0420 08:29:38.399828 132663849809728 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/blocking_gbytes_per_sec: 40.647 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.03795027732849121 s) (per-host)
I0420 08:29:38.399883 132663849809728 base_pytree_checkpoint_handler.py:768] [process=4][thread=MainThread] Initiated Pytree async_save. Time taken: 0.038012s (batch_requests_ready=0.001759s, total_serialization_initiated=0.036184s, others=0.000069s)
I0420 08:29:38.399999 132663849809728 composite_checkpoint_handler.py:715] [process=4][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.042164s (all_items=0.000014s, per_item={'items': '0.00001383'}, temp_paths=0.042150)
I0420 08:29:38.400757 132663849809728 event_tracking.py:125] [process=4] [async] Finished blocking save in 0.32 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533/linen_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533_06_grad_accum/checkpoints/9.
I0420 08:29:38.401077 132533765273344 async_checkpointer.py:76] [process=4][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-20 08:49:38.401040
I0420 08:29:38.402949 132663849809728 checkpoint_manager.py:1560] [process=4][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0420 08:29:38.403163 132534260180736 async_checkpointer.py:280] [process=4][thread=save_finalize] Waiting for background save thread=async_save.
I0420 08:29:38.403266 132663849809728 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533/linen_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533_06_grad_accum/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776673778.0762804, 'wait_for_prev_duration_secs': 8.654594421386719e-05, 'time_between_consecutive_saves_sec': 5.186988830566406, 'checkpointer_blocking_start_time': 1776673778.0783567, 'checkpointer_blocking_duration_secs': 0.32286810874938965, 'get_old_steps_start_time': 1776673778.4012465, 'get_old_steps_duration_secs': 3.1948089599609375e-05, 'checkpoint_manager_blocking_start_time': 1776673778.0746334, 'checkpoint_manager_blocking_duration_secs': 0.3286001682281494}
I0420 08:29:38.403440 132663849809728 checkpointing.py:409] Started an asynchronous checkpoint save for step 9
I0420 08:29:38.403485 132663849809728 checkpoint_manager.py:2020] [process=4][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0420 08:29:44.442757 132534276916992 array_metadata_store.py:203] [process=4][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533/linen_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533_06_grad_accum/checkpoints/9/items/array_metadatas/process_4
I0420 08:30:21.863993 132533765273344 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/gbytes_per_sec: 36.311 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 43.50208282470703 s) (per-host)
I0420 08:30:21.864104 132533765273344 async_checkpointer.py:90] [process=4][thread=async_save] 3 Handler Commit operations completed. Time taken: 43.462912s.
I0420 08:30:29.922765 132533765273344 async_checkpointer.py:160] [process=4][thread=async_save] Background save thread done. Time taken: 51.521559s.
I0420 08:30:29.923139 132534260180736 async_checkpointer.py:288] [process=4][thread=save_finalize] Done with waiting for background save thread=async_save.
I0420 08:30:29.923192 132534260180736 async_checkpointer.py:298] [process=4][thread=save_finalize] No errors found in background save thread=async_save.
I0420 08:30:29.923245 132534260180736 checkpoint_manager.py:2137] [process=4][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0420 08:30:29.925506 132534260180736 checkpoint_manager.py:2146] [process=4][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0420 08:30:29.925686 132663849809728 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.
I0420 08:30:29.925847 132663849809728 checkpoint_manager.py:2009] [process=4][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0420 08:30:29.926764 132663849809728 metric_logger.py:196] completed step: 9, seconds: 0.579, TFLOP/s/device: 93.905, Tokens/s/device: 14154.448, total_weights: 262144, loss: 9.457, lm_loss: 9.457, perplexity: 12802.546
Per train step:
 Total TFLOPs: 54.35 
 split as 93.93% learnable weight flops and 6.07% attention flops
XPK End: Mon Apr 20 08:30:41 UTC 2026
EXIT_CODE=0