MaxView

Timing Test Reference Updates
‹ 15_ocdbt_false_resumeCase: 15_ocdbt_false_save15_ocdbt_true_resume ›

Metrics: main (586e69205) vs feat/nnx-set-defaults-true (73213e044)

Metricmain  586e69205feat/nnx-set-defaults-true  73213e044Diff (feat/nnx-set-defaults-true − main)
Parameters1.104 billion1.104 billion—
Final loss7.18107.18100
TFLOP/s91.92292.101+0.179
Tok/s13855.413882.4+26.955
Avg s/step4.6384.183-0.455
Memory %1.381.380
JAX0.9.20.8.1—

Diff = branch value − main value. Green = branch improved. Red = branch regressed.

main  ·  586e69205  ·  main_20260423_071538  ·  full log 
XPK Start: Thu Apr 23 08:29:51 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. 
2026-04-23 08:30:16.335368: 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)
I0423 08:30:16.547871 132865507964736 max_utils.py:273] Attempting to initialize the jax distributed system...
I0423 08:30:25.588027 132865507964736 distributed.py:149] Starting JAX distributed service on [::]:8482
I0423 08:30:25.590349 132865507964736 distributed.py:172] Connecting to JAX distributed service on mt-15-ocdbt-false-sv-pvvo2-slice-job-0-0.mt-15-ocdbt-false-sv-pvvo2:8482
I0423 08:30:26.727733 132865507964736 max_utils.py:284] Jax distributed system initialized!
I0423 08:30:31.828818 132865507964736 max_utils.py:800] System Information: Jax Version: 0.9.2
I0423 08:30:31.828939 132865507964736 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0423 08:30:31.828984 132865507964736 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
I0423 08:30:31.829021 132865507964736 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0423 08:30:32.521319 132865507964736 maxtext_utils.py:1604] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0423 08:30:32.521606 132865507964736 checkpointing.py:677] Setting up checkpoint logger...
I0423 08:30:32.521661 132865507964736 checkpointing.py:233] Creating checkpoint manager with ocdbt=False and zarr3=True
I0423 08:30:32.521706 132865507964736 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0423 08:30:32.522058 132865507964736 base_pytree_checkpoint_handler.py:441] Created BasePyTreeCheckpointHandler: use_ocdbt=False, use_zarr3=True, pytree_metadata_options=PyTreeMetadataOptions(support_rich_types=False), array_metadata_store=<orbax.checkpoint._src.metadata.array_metadata_store.Store object at 0x78d6907190a0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0423 08:30:35.831199 132865507964736 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0423 08:30:35.831470 132865507964736 checkpoint_manager.py:708] [process=3][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x78d565818380>}, handler_registry=None
I0423 08:30:35.831881 132865507964736 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x78d565818380>` 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`.
I0423 08:30:35.831971 132865507964736 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x78c2903fcef0>` 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`.
I0423 08:30:35.832026 132865507964736 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 0x78d565818380>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x78d565818380>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x78c2903fcef0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x78c2903fcef0>}).
I0423 08:30:35.832386 132865507964736 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0423 08:30:35.832476 132865507964736 async_checkpointer.py:192] [process=3][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x78c290159a80> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0423 08:30:36.545762 132865507964736 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_15_ocdbt_false/checkpoints
I0423 08:30:37.004840 132865507964736 checkpoint_manager.py:929] [process=3][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_main_20260423_071538/linen_xpk_main_20260423_071538_15_ocdbt_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x78c29061bbf0>
I0423 08:30:37.005044 132865507964736 checkpointing.py:301] Checkpoint manager created!
I0423 08:30:37.933543 132865507964736 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0423 08:30:37.933659 132865507964736 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0423 08:30:38.313962 132865507964736 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn').
I0423 08:30:38.314055 132865507964736 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0423 08:30:38.330562 132865507964736 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn').
I0423 08:30:38.330623 132865507964736 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0423 08:30:38.354600 132865507964736 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim').
I0423 08:30:38.354672 132865507964736 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0423 08:30:38.371298 132865507964736 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim').
I0423 08:30:38.371358 132865507964736 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0423 08:30:38.387986 132865507964736 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim').
I0423 08:30:38.388052 132865507964736 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0423 08:30:38.412833 132865507964736 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch_attn', 'activation_length_attn', 'activation_heads', 'activation_kv').
I0423 08:30:38.412906 132865507964736 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0423 08:30:38.434405 132865507964736 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0423 08:30:38.434477 132865507964736 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0423 08:30:38.646897 132865507964736 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0423 08:30:38.647021 132865507964736 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0423 08:30:40.075982 132865507964736 maxtext_utils.py:1707]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  (None,)
I0423 08:30:40.076107 132865507964736 maxtext_utils.py:1707]  params/params/decoder/layers/mlp/wi_0/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0423 08:30:40.076160 132865507964736 maxtext_utils.py:1707]  params/params/decoder/layers/mlp/wi_1/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0423 08:30:40.076216 132865507964736 maxtext_utils.py:1707]  params/params/decoder/layers/mlp/wo/kernel
    Shape:     float32[7168,16,2048]
    Logical:   P('mlp', 'layers', 'embed')
    Physical:  (None, None, 'fsdp')
I0423 08:30:40.076268 132865507964736 maxtext_utils.py:1707]  params/params/decoder/layers/post_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0423 08:30:40.076307 132865507964736 maxtext_utils.py:1707]  params/params/decoder/layers/pre_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0423 08:30:40.076359 132865507964736 maxtext_utils.py:1707]  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)
I0423 08:30:40.076410 132865507964736 maxtext_utils.py:1707]  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')
I0423 08:30:40.076455 132865507964736 maxtext_utils.py:1707]  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)
I0423 08:30:40.076492 132865507964736 maxtext_utils.py:1707]  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)
I0423 08:30:40.076543 132865507964736 maxtext_utils.py:1707]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)
I0423 08:30:40.076593 132865507964736 maxtext_utils.py:1707]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')

I0423 08:30:40.575580 132865507964736 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0423 08:30:40.575682 132865507964736 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0423 08:30:40.591452 132865507964736 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0423 08:30:40.591529 132865507964736 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0423 08:30:51.527806 132865507964736 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.
I0423 08:30:51.528592 132865507964736 metric_logger.py:301] number parameters: 1.104 billion
I0423 08:31:03.240464 132865507964736 checkpointing.py:772] Waiting for step 0 to finish before checkpoint...
I0423 08:31:03.393254 132865507964736 checkpointing.py:776] Waited 0.1527721881866455 seconds for step 0 to finish before starting checkpointing.
I0423 08:31:03.395957 132865507964736 checkpoint_manager.py:2009] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0423 08:31:03.397541 132865507964736 checkpoint_manager.py:1512] [process=3] Saving checkpoint at step 0
I0423 08:31:03.398907 132865507964736 event_tracking.py:70] [process=3] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_15_ocdbt_false/checkpoints/0.
I0423 08:31:03.760399 132865507964736 signaling_client.py:364] Using JaxDistributedSignalingClient
I0423 08:31:03.763003 132865507964736 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0423 08:31:03.763061 132865507964736 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
I0423 08:31:04.043425 132865507964736 base_pytree_checkpoint_handler.py:154] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.283094s
I0423 08:31:04.043599 132865507964736 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/blocking_gbytes_per_sec: 5.345 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28858208656311035 s) (per-host)
I0423 08:31:04.043650 132865507964736 base_pytree_checkpoint_handler.py:768] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.288644s (batch_requests_ready=0.002203s, total_serialization_initiated=0.286371s, others=0.000071s)
I0423 08:31:04.043745 132865507964736 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.292760s (all_items=0.000018s, per_item={'items': '0.00001764'}, temp_paths=0.292743)
I0423 08:31:04.044601 132865507964736 event_tracking.py:125] [process=3] [async] Finished blocking save in 0.65 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_15_ocdbt_false/checkpoints/0.
I0423 08:31:04.044960 132739588159232 async_checkpointer.py:76] [process=3][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 08:51:04.044909
I0423 08:31:04.046903 132865507964736 checkpoint_manager.py:1560] [process=3][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0423 08:31:04.047193 132738514417408 async_checkpointer.py:280] [process=3][thread=save_finalize] Waiting for background save thread=async_save.
I0423 08:31:04.047321 132865507964736 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_15_ocdbt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776933063.3959374, 'wait_for_prev_duration_secs': 6.318092346191406e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776933063.3975787, 'checkpointer_blocking_duration_secs': 0.6475358009338379, 'get_old_steps_start_time': 1776933064.0451403, 'get_old_steps_duration_secs': 2.956390380859375e-05, 'checkpoint_manager_blocking_start_time': 1776933063.393722, 'checkpoint_manager_blocking_duration_secs': 0.6535618305206299}
I0423 08:31:04.047479 132865507964736 checkpointing.py:408] Started an asynchronous checkpoint save for step 0
I0423 08:31:04.047529 132865507964736 max_utils.py:750] 
Memstats: After params initialized:
I0423 08:31:04.047575 132865507964736 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_10(process=3,(2,2,0,0))
I0423 08:31:04.047607 132865507964736 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_11(process=3,(3,2,0,0))
I0423 08:31:04.047635 132865507964736 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_14(process=3,(2,3,0,0))
I0423 08:31:04.047661 132865507964736 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_15(process=3,(3,3,0,0))
I0423 08:31:04.363073 132865507964736 metric_logger.py:196] completed step: 0, seconds: 11.712, TFLOP/s/device: 1.160, Tokens/s/device: 174.867, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0423 08:31:04.544290 132865507964736 metric_logger.py:196] completed step: 1, seconds: 1.121, TFLOP/s/device: 12.120, Tokens/s/device: 1826.811, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0423 08:31:04.986155 132865507964736 metric_logger.py:196] completed step: 2, seconds: 0.034, TFLOP/s/device: 398.520, Tokens/s/device: 60069.220, total_weights: 65536, loss: 10.560, lm_loss: 10.560, perplexity: 38547.719
I0423 08:31:05.133652 132865507964736 metric_logger.py:196] completed step: 3, seconds: 0.442, TFLOP/s/device: 30.735, Tokens/s/device: 4632.761, total_weights: 65536, loss: 9.980, lm_loss: 9.980, perplexity: 21590.506
I0423 08:31:05.138303 132865507964736 checkpointing.py:772] Waiting for step 5 to finish before checkpoint...
I0423 08:31:05.427618 132865507964736 checkpointing.py:776] Waited 0.2892787456512451 seconds for step 5 to finish before starting checkpointing.
I0423 08:31:05.430583 132865507964736 checkpoint_manager.py:2020] [process=3][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0423 08:31:06.989534    2737 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0423 08:31:09.518484 132739529664256 array_metadata_store.py:203] [process=3][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_15_ocdbt_false/checkpoints/0/items/array_metadatas/process_3
I0423 08:31:14.028451 132739588159232 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/gbytes_per_sec: 153.756 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 10.273394584655762 s) (per-host)
I0423 08:31:14.028579 132739588159232 async_checkpointer.py:90] [process=3][thread=async_save] 3 Handler Commit operations completed. Time taken: 9.983504s.
I0423 08:31:21.656656 132739588159232 async_checkpointer.py:160] [process=3][thread=async_save] Background save thread done. Time taken: 17.611564s.
I0423 08:31:21.656955 132738514417408 async_checkpointer.py:288] [process=3][thread=save_finalize] Done with waiting for background save thread=async_save.
I0423 08:31:21.657072 132738514417408 async_checkpointer.py:298] [process=3][thread=save_finalize] No errors found in background save thread=async_save.
I0423 08:31:21.657124 132738514417408 checkpoint_manager.py:2137] [process=3][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0423 08:31:21.658803 132738514417408 checkpoint_manager.py:2146] [process=3][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0423 08:31:21.659005 132865507964736 checkpoint_manager.py:2032] [process=3][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0423 08:31:21.659138 132865507964736 checkpoint_manager.py:1452] Waiting for previous save to complete took 16.228553 seconds. If this number is high, consider checkpointing less frequently.
I0423 08:31:21.661258 132865507964736 checkpoint_manager.py:1512] [process=3] Saving checkpoint at step 5
I0423 08:31:21.663746 132865507964736 event_tracking.py:70] [process=3] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_15_ocdbt_false/checkpoints/5.
I0423 08:31:21.950366 132865507964736 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0423 08:31:21.950463 132865507964736 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
I0423 08:31:21.985687 132865507964736 base_pytree_checkpoint_handler.py:154] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.036465s
I0423 08:31:21.985862 132865507964736 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/blocking_gbytes_per_sec: 38.630 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.0399320125579834 s) (per-host)
I0423 08:31:21.985916 132865507964736 base_pytree_checkpoint_handler.py:768] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.039995s (batch_requests_ready=0.001768s, total_serialization_initiated=0.038159s, others=0.000069s)
I0423 08:31:21.986024 132865507964736 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.045158s (all_items=0.000015s, per_item={'items': '0.00001502'}, temp_paths=0.045143)
I0423 08:31:21.986682 132865507964736 event_tracking.py:125] [process=3] [async] Finished blocking save in 0.33 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_15_ocdbt_false/checkpoints/5.
I0423 08:31:21.987030 132739571373824 async_checkpointer.py:76] [process=3][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 08:51:21.986989
I0423 08:31:21.994497 132865507964736 checkpoint_manager.py:1560] [process=3][thread=MainThread][step=5] Starting CheckpointManager Save Finalize thread=save_finalize
I0423 08:31:21.994729 132738514417408 async_checkpointer.py:280] [process=3][thread=save_finalize] Waiting for background save thread=async_save.
I0423 08:31:21.994859 132865507964736 standard_logger.py:34] {'step': 5, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_15_ocdbt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776933065.4305527, 'wait_for_prev_duration_secs': 16.228553295135498, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776933081.6613023, 'checkpointer_blocking_duration_secs': 0.32587265968322754, 'get_old_steps_start_time': 1776933081.9872038, 'get_old_steps_duration_secs': 3.719329833984375e-05, 'checkpoint_manager_blocking_start_time': 1776933065.42832, 'checkpoint_manager_blocking_duration_secs': 16.566500425338745}
I0423 08:31:21.994992 132865507964736 checkpointing.py:408] Started an asynchronous checkpoint save for step 5
I0423 08:31:21.995907 132865507964736 metric_logger.py:196] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.704, Tokens/s/device: 13370.503, total_weights: 65536, loss: 9.460, lm_loss: 9.460, perplexity: 12840.355
I0423 08:31:22.002679 132865507964736 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.231, Tokens/s/device: 13902.088, total_weights: 65536, loss: 8.959, lm_loss: 8.959, perplexity: 7776.467
I0423 08:31:27.794533 132739529664256 array_metadata_store.py:203] [process=3][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_15_ocdbt_false/checkpoints/5/items/array_metadatas/process_3
I0423 08:31:33.357706 132739571373824 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/gbytes_per_sec: 138.419 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 11.411736011505127 s) (per-host)
I0423 08:31:33.357833 132739571373824 async_checkpointer.py:90] [process=3][thread=async_save] 3 Handler Commit operations completed. Time taken: 11.370687s.
I0423 08:31:39.982445 132739571373824 async_checkpointer.py:160] [process=3][thread=async_save] Background save thread done. Time taken: 17.995282s.
I0423 08:31:39.982698 132738514417408 async_checkpointer.py:288] [process=3][thread=save_finalize] Done with waiting for background save thread=async_save.
I0423 08:31:39.982812 132738514417408 async_checkpointer.py:298] [process=3][thread=save_finalize] No errors found in background save thread=async_save.
I0423 08:31:39.982861 132738514417408 checkpoint_manager.py:2137] [process=3][thread=save_finalize][step=5] CheckpointManager Save Finalize is syncing with other hosts...
I0423 08:31:39.985458 132738514417408 checkpoint_manager.py:2146] [process=3][thread=save_finalize][step=5] CheckpointManager Save Finalize is done on all hosts.
I0423 08:31:44.832757 132865507964736 metric_logger.py:196] completed step: 6, seconds: 16.863, TFLOP/s/device: 0.806, Tokens/s/device: 121.451, total_weights: 65536, loss: 8.469, lm_loss: 8.469, perplexity: 4762.740
I0423 08:31:44.980133 132865507964736 metric_logger.py:196] completed step: 7, seconds: 22.684, TFLOP/s/device: 0.599, Tokens/s/device: 90.284, total_weights: 65536, loss: 8.003, lm_loss: 8.003, perplexity: 2989.151
I0423 08:31:45.127297 132865507964736 metric_logger.py:196] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.118, Tokens/s/device: 13432.855, total_weights: 65536, loss: 7.572, lm_loss: 7.572, perplexity: 1943.098
I0423 08:31:45.274196 132865507964736 checkpointing.py:772] Waiting for step 9 to finish before checkpoint...
I0423 08:31:45.274881 132865507964736 checkpointing.py:776] Waited 0.0007050037384033203 seconds for step 9 to finish before starting checkpointing.
I0423 08:31:45.276972 132865507964736 checkpoint_manager.py:2009] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0423 08:31:45.278685 132865507964736 checkpoint_manager.py:1512] [process=3] Saving checkpoint at step 9
I0423 08:31:45.279913 132865507964736 event_tracking.py:70] [process=3] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_15_ocdbt_false/checkpoints/9.
I0423 08:31:45.592002 132865507964736 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0423 08:31:45.592092 132865507964736 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
I0423 08:31:45.628070 132865507964736 base_pytree_checkpoint_handler.py:154] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.037009s
I0423 08:31:45.628220 132865507964736 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/blocking_gbytes_per_sec: 38.114 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04047250747680664 s) (per-host)
I0423 08:31:45.628267 132865507964736 base_pytree_checkpoint_handler.py:768] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.040530s (batch_requests_ready=0.001643s, total_serialization_initiated=0.038825s, others=0.000062s)
I0423 08:31:45.628351 132865507964736 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.044666s (all_items=0.000011s, per_item={'items': '0.00001097'}, temp_paths=0.044655)
I0423 08:31:45.629071 132865507964736 event_tracking.py:125] [process=3] [async] Finished blocking save in 0.35 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_15_ocdbt_false/checkpoints/9.
I0423 08:31:45.629338 132738514417408 async_checkpointer.py:76] [process=3][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 08:51:45.629314
I0423 08:31:45.633088 132865507964736 checkpoint_manager.py:1560] [process=3][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0423 08:31:45.633348 132737943975680 async_checkpointer.py:280] [process=3][thread=save_finalize] Waiting for background save thread=async_save.
I0423 08:31:45.633506 132865507964736 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_15_ocdbt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776933105.2769406, 'wait_for_prev_duration_secs': 7.128715515136719e-05, 'time_between_consecutive_saves_sec': 5.2914347648620605, 'checkpointer_blocking_start_time': 1776933105.2787247, 'checkpointer_blocking_duration_secs': 0.35071372985839844, 'get_old_steps_start_time': 1776933105.629457, 'get_old_steps_duration_secs': 2.5510787963867188e-05, 'checkpoint_manager_blocking_start_time': 1776933105.2751257, 'checkpoint_manager_blocking_duration_secs': 0.3583500385284424}
I0423 08:31:45.633614 132865507964736 checkpointing.py:408] Started an asynchronous checkpoint save for step 9
I0423 08:31:45.633661 132865507964736 checkpoint_manager.py:2020] [process=3][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0423 08:31:50.682037 132739529664256 array_metadata_store.py:203] [process=3][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_15_ocdbt_false/checkpoints/9/items/array_metadatas/process_3
I0423 08:31:56.145634 132738514417408 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/gbytes_per_sec: 149.613 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 10.557860374450684 s) (per-host)
I0423 08:31:56.145747 132738514417408 async_checkpointer.py:90] [process=3][thread=async_save] 3 Handler Commit operations completed. Time taken: 10.516331s.
I0423 08:32:02.120198 132738514417408 async_checkpointer.py:160] [process=3][thread=async_save] Background save thread done. Time taken: 16.490766s.
I0423 08:32:02.120468 132737943975680 async_checkpointer.py:288] [process=3][thread=save_finalize] Done with waiting for background save thread=async_save.
I0423 08:32:02.120585 132737943975680 async_checkpointer.py:298] [process=3][thread=save_finalize] No errors found in background save thread=async_save.
I0423 08:32:02.120626 132737943975680 checkpoint_manager.py:2137] [process=3][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0423 08:32:02.122262 132737943975680 checkpoint_manager.py:2146] [process=3][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0423 08:32:02.122420 132865507964736 checkpoint_manager.py:2032] [process=3][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9.
I0423 08:32:02.122595 132865507964736 checkpoint_manager.py:2009] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0423 08:32:02.123493 132865507964736 metric_logger.py:196] completed step: 9, seconds: 0.148, TFLOP/s/device: 91.922, Tokens/s/device: 13855.438, 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: Thu Apr 23 08:32:11 UTC 2026
EXIT_CODE=0
feat/nnx-set-defaults-true  ·  73213e044  ·  feat_nnx_set_defaults_true_20260423_155242  ·  full log 
XPK Start: Thu Apr 23 17:05:37 UTC 2026
2026-04-23 17:05:41.862440: E external/local_xla/xla/stream_executor/cuda/cuda_fft.cc:467] Unable to register cuFFT factory: Attempting to register factory for plugin cuFFT when one has already been registered
WARNING: All log messages before absl::InitializeLog() is called are written to STDERR
E0000 00:00:1776963941.875270      10 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered
E0000 00:00:1776963941.879268      10 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered
W0000 00:00:1776963941.890658      10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776963941.890679      10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776963941.890681      10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776963941.890683      10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
2026-04-23 17:06:01.102510: 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)
I0423 17:06:01.635366 138857496962880 max_utils.py:273] Attempting to initialize the jax distributed system...
INFO:2026-04-23 17:06:10,677:jax._src.distributed:140: Starting JAX distributed service on [::]:8482
I0423 17:06:10.677407 138857496962880 distributed.py:140] Starting JAX distributed service on [::]:8482
INFO:2026-04-23 17:06:10,679:jax._src.distributed:157: Connecting to JAX distributed service on mt-15-ocdbt-false-sv-5qzhr-slice-job-0-0.mt-15-ocdbt-false-sv-5qzhr:8482
I0423 17:06:10.679697 138857496962880 distributed.py:157] Connecting to JAX distributed service on mt-15-ocdbt-false-sv-5qzhr-slice-job-0-0.mt-15-ocdbt-false-sv-5qzhr:8482
I0423 17:06:11.892691 138857496962880 max_utils.py:284] Jax distributed system initialized!
I0423 17:06:17.651313 138857496962880 max_utils.py:800] System Information: Jax Version: 0.8.1
I0423 17:06:17.651420 138857496962880 max_utils.py:801] System Information: Jaxlib Version: 0.8.1
I0423 17:06:17.651464 138857496962880 max_utils.py:802] System Information: Jax Backend: PJRT C API
TFRT TPU v6 lite
Built on Nov 12 2025 14:16:36 (1762985796) cl/831091709
I0423 17:06:17.651502 138857496962880 train_utils.py:377] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0423 17:06:18.273605 138857496962880 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0423 17:06:18.274233 138857496962880 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0423 17:06:18.274416 138857496962880 checkpointing.py:688] Setting up checkpoint logger...
I0423 17:06:18.274468 138857496962880 checkpointing.py:234] Creating checkpoint manager with ocdbt=False and zarr3=True
I0423 17:06:18.274519 138857496962880 pytree_checkpoint_handler.py:589] save_device_host_concurrent_bytes=None
I0423 17:06:18.274869 138857496962880 base_pytree_checkpoint_handler.py:415] Created BasePyTreeCheckpointHandler: use_ocdbt=False, use_zarr3=True, pytree_metadata_options=PyTreeMetadataOptions(support_rich_types=False), array_metadata_store=<orbax.checkpoint._src.metadata.array_metadata_store.Store object at 0x7e49c3f71490>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0423 17:06:21.286827 138857496962880 checkpointing.py:266] Enabling policy for fixed interval checkpointing.
I0423 17:06:21.287198 138857496962880 checkpoint_manager.py:709] [process=6][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e3775fea120>}, handler_registry=None
I0423 17:06:21.287441 138857496962880 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e3775fea120>` 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`.
I0423 17:06:21.287490 138857496962880 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e3775fef3e0>` 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`.
I0423 17:06:21.287524 138857496962880 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 0x7e3775fea120>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e3775fea120>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e3775fef3e0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e3775fef3e0>}).
I0423 17:06:21.288027 138857496962880 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.33
I0423 17:06:21.288119 138857496962880 async_checkpointer.py:177] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7e37755a0180> timeout: 600 secs and primary_host=0 for async checkpoint writes
I0423 17:06:22.291534 138857496962880 checkpoint_manager.py:1818] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_15_ocdbt_false/checkpoints
I0423 17:06:22.330430 138857496962880 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_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_15_ocdbt_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7e3775fea3f0>
I0423 17:06:22.330570 138857496962880 checkpointing.py:302] Checkpoint manager created!
I0423 17:06:23.220540 138857496962880 nnx_wrappers.py:455] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0423 17:06:23.220643 138857496962880 nnx_wrappers.py:455] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0423 17:06:23.595676 138857496962880 attentions.py:1084] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0423 17:06:23.595766 138857496962880 attentions.py:1084] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0423 17:06:23.611798 138857496962880 attentions.py:1085] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0423 17:06:23.611857 138857496962880 attentions.py:1085] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0423 17:06:23.634761 138857496962880 attentions.py:1150] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0423 17:06:23.634836 138857496962880 attentions.py:1150] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0423 17:06:23.650808 138857496962880 attentions.py:1151] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0423 17:06:23.650870 138857496962880 attentions.py:1151] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0423 17:06:23.666806 138857496962880 attentions.py:1152] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0423 17:06:23.666867 138857496962880 attentions.py:1152] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0423 17:06:23.691727 138857496962880 attentions.py:1193] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0423 17:06:23.691797 138857496962880 attentions.py:1193] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0423 17:06:23.711535 138857496962880 linears.py:541] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0423 17:06:23.711601 138857496962880 linears.py:541] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0423 17:06:23.901228 138857496962880 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint
I0423 17:06:23.901338 138857496962880 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0423 17:06:25.335138 138857496962880 maxtext_utils.py:1740]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   PartitionSpec('norm',)
    Physical:  (None,)
I0423 17:06:25.335273 138857496962880 maxtext_utils.py:1740]  params/params/decoder/layers/mlp/wi_0/kernel
    Shape:     float32[2048,16,7168]
    Logical:   PartitionSpec('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0423 17:06:25.335334 138857496962880 maxtext_utils.py:1740]  params/params/decoder/layers/mlp/wi_1/kernel
    Shape:     float32[2048,16,7168]
    Logical:   PartitionSpec('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0423 17:06:25.335394 138857496962880 maxtext_utils.py:1740]  params/params/decoder/layers/mlp/wo/kernel
    Shape:     float32[7168,16,2048]
    Logical:   PartitionSpec('mlp', 'layers', 'embed')
    Physical:  (None, None, 'fsdp')
I0423 17:06:25.335448 138857496962880 maxtext_utils.py:1740]  params/params/decoder/layers/post_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   PartitionSpec('norm', 'layers')
    Physical:  (None, None)
I0423 17:06:25.335488 138857496962880 maxtext_utils.py:1740]  params/params/decoder/layers/pre_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   PartitionSpec('norm', 'layers')
    Physical:  (None, None)
I0423 17:06:25.335540 138857496962880 maxtext_utils.py:1740]  params/params/decoder/layers/self_attention/key/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   PartitionSpec('embed', 'layers', 'kv_heads', 'kv_head_dim')
    Physical:  ('fsdp', None, None, None)
I0423 17:06:25.335594 138857496962880 maxtext_utils.py:1740]  params/params/decoder/layers/self_attention/out/kernel
    Shape:     float32[16,16,128,2048]
    Logical:   PartitionSpec('heads', 'layers', 'kv', 'embed')
    Physical:  (None, None, None, 'fsdp')
I0423 17:06:25.335636 138857496962880 maxtext_utils.py:1740]  params/params/decoder/layers/self_attention/query/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   PartitionSpec('embed', 'layers', 'q_heads', 'kv')
    Physical:  ('fsdp', None, None, None)
I0423 17:06:25.335674 138857496962880 maxtext_utils.py:1740]  params/params/decoder/layers/self_attention/value/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   PartitionSpec('embed', 'layers', 'kv_heads', 'kv_head_dim')
    Physical:  ('fsdp', None, None, None)
I0423 17:06:25.335723 138857496962880 maxtext_utils.py:1740]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   PartitionSpec('embed', 'vocab')
    Physical:  ('fsdp', None)
I0423 17:06:25.335772 138857496962880 maxtext_utils.py:1740]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   PartitionSpec('vocab', 'embed')
    Physical:  (None, 'fsdp')

I0423 17:06:25.836527 138857496962880 train.py:158] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0423 17:06:25.836626 138857496962880 train.py:158] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0423 17:06:25.851927 138857496962880 train.py:165] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0423 17:06:25.851988 138857496962880 train.py:165] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0423 17:06:36.543013 138857496962880 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.
I0423 17:06:36.543853 138857496962880 metric_logger.py:289] number parameters: 1.104 billion
I0423 17:06:47.689880 138857496962880 checkpointing.py:794] Waiting for step 0 to finish before checkpoint...
I0423 17:06:48.115461 138857496962880 checkpointing.py:798] Waited 0.42556095123291016 seconds for step 0 to finish before starting checkpointing.
I0423 17:06:48.120142 138857496962880 checkpoint_manager.py:2013] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0423 17:06:48.121896 138857496962880 checkpoint_manager.py:1518] [process=6] Saving checkpoint at step 0
I0423 17:06:48.125143 138857496962880 async_checkpointer.py:452] [process=6] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_15_ocdbt_false/checkpoints/0.
I0423 17:06:49.121013 138857496962880 signaling_client.py:364] Using JaxDistributedSignalingClient
I0423 17:06:49.122047 138857496962880 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array.
I0423 17:06:49.122121 138857496962880 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
I0423 17:06:49.382904 138857496962880 base_pytree_checkpoint_handler.py:153] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.261971s
I0423 17:06:49.383076 138857496962880 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.766 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.557624340057373 s) (per-host)
I0423 17:06:49.383153 138857496962880 base_pytree_checkpoint_handler.py:737] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.557710s (batch_requests_ready=0.292033s, total_serialization_initiated=0.265583s, others=0.000094s)
I0423 17:06:49.383247 138857496962880 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.561875s (all_items=0.000019s, per_item={'items': '0.00001931'}, temp_paths=0.561856)
I0423 17:06:49.384236 138738147505920 async_checkpointer.py:79] [process=6][thread=async_save] Background save thread started.
I0423 17:06:49.384365 138857496962880 async_checkpointer.py:561] Finished blocking save. Time taken: 1.262395s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_15_ocdbt_false/checkpoints/0.
I0423 17:06:49.386257 138857496962880 checkpoint_manager.py:1566] [process=6][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0423 17:06:49.386565 138733349238528 async_checkpointer.py:265] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0423 17:06:49.386696 138857496962880 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_15_ocdbt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776964008.1201231, 'wait_for_prev_duration_secs': 6.246566772460938e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776964008.1219375, 'checkpointer_blocking_duration_secs': 1.2626111507415771, 'get_old_steps_start_time': 1776964009.3845692, 'get_old_steps_duration_secs': 2.47955322265625e-05, 'checkpoint_manager_blocking_start_time': 1776964008.116051, 'checkpoint_manager_blocking_duration_secs': 1.2706072330474854}
I0423 17:06:49.386846 138857496962880 checkpointing.py:409] Started an asynchronous checkpoint save for step 0
I0423 17:06:49.386897 138857496962880 max_utils.py:750] 
Memstats: After params initialized:
I0423 17:06:49.386945 138857496962880 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0))
I0423 17:06:49.386981 138857496962880 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0))
I0423 17:06:49.387010 138857496962880 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0))
I0423 17:06:49.387034 138857496962880 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0))
I0423 17:06:49.659039 138857496962880 metric_logger.py:185] completed step: 0, seconds: 11.146, TFLOP/s/device: 1.219, Tokens/s/device: 183.744, total_weights: 65536, loss: 10.874
I0423 17:06:49.830410 138857496962880 metric_logger.py:185] completed step: 1, seconds: 1.968, TFLOP/s/device: 6.904, Tokens/s/device: 1040.711, total_weights: 65536, loss: 10.874
I0423 17:06:50.279155 138857496962880 metric_logger.py:185] completed step: 2, seconds: 0.022, TFLOP/s/device: 607.653, Tokens/s/device: 91592.129, total_weights: 65536, loss: 10.560
I0423 17:06:50.426657 138857496962880 metric_logger.py:185] completed step: 3, seconds: 0.451, TFLOP/s/device: 30.122, Tokens/s/device: 4540.265, total_weights: 65536, loss: 9.980
I0423 17:06:50.431025 138857496962880 checkpointing.py:794] Waiting for step 5 to finish before checkpoint...
I0423 17:06:50.721410 138857496962880 checkpointing.py:798] Waited 0.29034852981567383 seconds for step 5 to finish before starting checkpointing.
I0423 17:06:50.724209 138857496962880 checkpoint_manager.py:2024] [process=6][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0423 17:06:52.037119    2541 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0423 17:06:53.983337 138738155898624 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_15_ocdbt_false/checkpoints/0/items/array_metadatas/process_6
I0423 17:06:59.503010 138738147505920 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/gbytes_per_sec: 147.937 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 10.677516460418701 s) (per-host)
I0423 17:06:59.503149 138738147505920 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 10.118702s.
I0423 17:07:05.386812 138738147505920 async_checkpointer.py:144] [process=6][thread=async_save] Background save thread done. Time taken: 16.002351s.
I0423 17:07:05.387155 138733349238528 async_checkpointer.py:273] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0423 17:07:05.387279 138733349238528 async_checkpointer.py:283] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0423 17:07:05.387331 138733349238528 checkpoint_manager.py:2133] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0423 17:07:05.389574 138733349238528 checkpoint_manager.py:2142] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0423 17:07:05.389760 138857496962880 checkpoint_manager.py:2036] [process=6][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0423 17:07:05.389885 138857496962880 checkpoint_manager.py:1458] Waiting for previous save to complete took 14.665682 seconds. If this number is high, consider checkpointing less frequently.
I0423 17:07:05.391800 138857496962880 checkpoint_manager.py:1518] [process=6] Saving checkpoint at step 5
I0423 17:07:05.395967 138857496962880 async_checkpointer.py:452] [process=6] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_15_ocdbt_false/checkpoints/5.
I0423 17:07:05.948922 138857496962880 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array.
I0423 17:07:05.949022 138857496962880 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
I0423 17:07:05.994898 138857496962880 base_pytree_checkpoint_handler.py:153] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.047246s
I0423 17:07:05.995064 138857496962880 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/blocking_gbytes_per_sec: 4.891 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.3153989315032959 s) (per-host)
I0423 17:07:05.995130 138857496962880 base_pytree_checkpoint_handler.py:737] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.315473s (batch_requests_ready=0.266247s, total_serialization_initiated=0.049143s, others=0.000082s)
I0423 17:07:05.995222 138857496962880 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.320336s (all_items=0.000015s, per_item={'items': '0.00001502'}, temp_paths=0.320321)
I0423 17:07:05.996121 138729557571328 async_checkpointer.py:79] [process=6][thread=async_save] Background save thread started.
I0423 17:07:05.996248 138857496962880 async_checkpointer.py:561] Finished blocking save. Time taken: 0.604372s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_15_ocdbt_false/checkpoints/5.
I0423 17:07:06.015073 138857496962880 checkpoint_manager.py:1566] [process=6][thread=MainThread][step=5] Starting CheckpointManager Save Finalize thread=save_finalize
I0423 17:07:06.015367 138733349238528 async_checkpointer.py:265] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0423 17:07:06.015541 138857496962880 standard_logger.py:34] {'step': 5, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_15_ocdbt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776964010.7241805, 'wait_for_prev_duration_secs': 14.665681838989258, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776964025.3918397, 'checkpointer_blocking_duration_secs': 0.6045761108398438, 'get_old_steps_start_time': 1776964025.9964359, 'get_old_steps_duration_secs': 2.574920654296875e-05, 'checkpoint_manager_blocking_start_time': 1776964010.7220144, 'checkpoint_manager_blocking_duration_secs': 15.293489217758179}
I0423 17:07:06.015659 138857496962880 checkpointing.py:409] Started an asynchronous checkpoint save for step 5
I0423 17:07:06.016257 138857496962880 metric_logger.py:185] completed step: 4, seconds: 0.152, TFLOP/s/device: 89.177, Tokens/s/device: 13441.760, total_weights: 65536, loss: 9.460
I0423 17:07:06.022114 138857496962880 metric_logger.py:185] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.202, Tokens/s/device: 13897.748, total_weights: 65536, loss: 8.959
I0423 17:07:25.185122 138857496962880 metric_logger.py:185] completed step: 6, seconds: 15.590, TFLOP/s/device: 0.872, Tokens/s/device: 131.367, total_weights: 65536, loss: 8.469
I0423 17:07:25.332612 138857496962880 metric_logger.py:185] completed step: 7, seconds: 19.017, TFLOP/s/device: 0.714, Tokens/s/device: 107.694, total_weights: 65536, loss: 8.003
I0423 17:07:25.479906 138857496962880 metric_logger.py:185] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.313, Tokens/s/device: 13462.171, total_weights: 65536, loss: 7.572
I0423 17:07:25.627010 138857496962880 checkpointing.py:794] Waiting for step 9 to finish before checkpoint...
I0423 17:07:25.627676 138857496962880 checkpointing.py:798] Waited 0.0006847381591796875 seconds for step 9 to finish before starting checkpointing.
I0423 17:07:25.629607 138857496962880 checkpoint_manager.py:2024] [process=6][thread=MainThread][step=5][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0423 17:07:30.656883 138738155898624 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_15_ocdbt_false/checkpoints/5/items/array_metadatas/process_6
I0423 17:07:36.405584 138729557571328 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/gbytes_per_sec: 51.409 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 30.725874662399292 s) (per-host)
I0423 17:07:36.405703 138729557571328 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 30.409374s.
I0423 17:07:41.334238 138729557571328 async_checkpointer.py:144] [process=6][thread=async_save] Background save thread done. Time taken: 35.337895s.
I0423 17:07:41.334548 138733349238528 async_checkpointer.py:273] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0423 17:07:41.334666 138733349238528 async_checkpointer.py:283] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0423 17:07:41.334715 138733349238528 checkpoint_manager.py:2133] [process=6][thread=save_finalize][step=5] CheckpointManager Save Finalize is syncing with other hosts...
I0423 17:07:41.336155 138733349238528 checkpoint_manager.py:2142] [process=6][thread=save_finalize][step=5] CheckpointManager Save Finalize is done on all hosts.
I0423 17:07:41.336329 138857496962880 checkpoint_manager.py:2036] [process=6][thread=MainThread][step=5][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=5.
W0423 17:07:41.336448 138857496962880 checkpoint_manager.py:1458] Waiting for previous save to complete took 15.706855 seconds. If this number is high, consider checkpointing less frequently.
I0423 17:07:41.337970 138857496962880 checkpoint_manager.py:1518] [process=6] Saving checkpoint at step 9
I0423 17:07:41.341533 138857496962880 async_checkpointer.py:452] [process=6] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_15_ocdbt_false/checkpoints/9.
I0423 17:07:42.319788 138857496962880 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array.
I0423 17:07:42.319885 138857496962880 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
I0423 17:07:42.361990 138857496962880 base_pytree_checkpoint_handler.py:153] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.043141s
I0423 17:07:42.362153 138857496962880 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.123 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.7264947891235352 s) (per-host)
I0423 17:07:42.362202 138857496962880 base_pytree_checkpoint_handler.py:737] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.726552s (batch_requests_ready=0.681366s, total_serialization_initiated=0.045123s, others=0.000062s)
I0423 17:07:42.362297 138857496962880 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.730726s (all_items=0.000011s, per_item={'items': '0.00001144'}, temp_paths=0.730714)
I0423 17:07:42.363170 138731688269568 async_checkpointer.py:79] [process=6][thread=async_save] Background save thread started.
I0423 17:07:42.363330 138857496962880 async_checkpointer.py:561] Finished blocking save. Time taken: 1.025290s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_15_ocdbt_false/checkpoints/9.
I0423 17:07:42.365284 138857496962880 checkpoint_manager.py:1566] [process=6][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0423 17:07:42.365523 138733349238528 async_checkpointer.py:265] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0423 17:07:42.365644 138857496962880 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_15_ocdbt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776964045.6295772, 'wait_for_prev_duration_secs': 15.706855297088623, 'time_between_consecutive_saves_sec': 20.239963054656982, 'checkpointer_blocking_start_time': 1776964061.3380096, 'checkpointer_blocking_duration_secs': 1.025430679321289, 'get_old_steps_start_time': 1776964062.3634534, 'get_old_steps_duration_secs': 1.9550323486328125e-05, 'checkpoint_manager_blocking_start_time': 1776964045.6279032, 'checkpoint_manager_blocking_duration_secs': 16.737709045410156}
I0423 17:07:42.365750 138857496962880 checkpointing.py:409] Started an asynchronous checkpoint save for step 9
I0423 17:07:42.365793 138857496962880 checkpoint_manager.py:2024] [process=6][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0423 17:07:47.488057 138738155898624 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_15_ocdbt_false/checkpoints/9/items/array_metadatas/process_6
I0423 17:07:53.417191 138731688269568 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/gbytes_per_sec: 134.074 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 11.781492233276367 s) (per-host)
I0423 17:07:53.417296 138731688269568 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 11.054015s.
I0423 17:07:58.658773 138731688269568 async_checkpointer.py:144] [process=6][thread=async_save] Background save thread done. Time taken: 16.295476s.
I0423 17:07:58.659023 138733349238528 async_checkpointer.py:273] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0423 17:07:58.659079 138733349238528 async_checkpointer.py:283] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0423 17:07:58.659129 138733349238528 checkpoint_manager.py:2133] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0423 17:07:58.660537 138733349238528 checkpoint_manager.py:2142] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0423 17:07:58.660729 138857496962880 checkpoint_manager.py:2036] [process=6][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9.
I0423 17:07:58.660884 138857496962880 checkpoint_manager.py:2013] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0423 17:07:58.661707 138857496962880 metric_logger.py:185] completed step: 9, seconds: 0.148, TFLOP/s/device: 92.101, Tokens/s/device: 13882.393, total_weights: 65536, loss: 7.181
Per train step:
 Total TFLOPs: 13.59 
 split as 93.93% learnable weight flops and 6.07% attention flops
XPK End: Thu Apr 23 17:08:08 UTC 2026
EXIT_CODE=0