MaxView

Timing Test Reference Updates
‹ 15_ocdbt_false_resumeCase: 15_ocdbt_false_save15_ocdbt_true_resume ›

Metrics: main (59e0f1759) vs feat/nnx-set-defaults-true (73213e044)

Metricmain  59e0f1759feat/nnx-set-defaults-true  73213e044Diff (feat/nnx-set-defaults-true − main)
Parameters1.104 billion1.104 billion—
Final loss7.18107.18100
TFLOP/s92.06192.165+0.104
Tok/s13876.513892.1+15.625
Avg s/step4.9364.197-0.739
Memory %1.381.380
JAX0.9.20.8.1—

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

main  ·  59e0f1759  ·  main_20260425_071456  ·  full log 
XPK Start: Sat Apr 25 08:17:34 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. 
2026-04-25 08:17:59.354071: 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)
I0425 08:17:59.558896 134917365917504 max_utils.py:273] Attempting to initialize the jax distributed system...
I0425 08:18:08.600152 134917365917504 distributed.py:149] Starting JAX distributed service on [::]:8482
I0425 08:18:08.602445 134917365917504 distributed.py:172] Connecting to JAX distributed service on mt-15-ocdbt-false-sv-2d7ta-slice-job-0-0.mt-15-ocdbt-false-sv-2d7ta:8482
I0425 08:18:09.887225 134917365917504 max_utils.py:284] Jax distributed system initialized!
I0425 08:18:14.992676 134917365917504 max_utils.py:800] System Information: Jax Version: 0.9.2
I0425 08:18:14.992781 134917365917504 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0425 08:18:14.992820 134917365917504 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
I0425 08:18:14.992854 134917365917504 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0425 08:18:15.684124 134917365917504 maxtext_utils.py:1604] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1)
I0425 08:18:15.684412 134917365917504 checkpointing.py:677] Setting up checkpoint logger...
I0425 08:18:15.684466 134917365917504 checkpointing.py:233] Creating checkpoint manager with ocdbt=False and zarr3=True
I0425 08:18:15.684512 134917365917504 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0425 08:18:15.684863 134917365917504 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 0x7ab451b14ef0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0425 08:18:18.550119 134917365917504 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0425 08:18:18.550360 134917365917504 checkpoint_manager.py:708] [process=6][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7aa0a074ba70>}, handler_registry=None
I0425 08:18:18.550592 134917365917504 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7aa0a074ba70>` 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`.
I0425 08:18:18.550642 134917365917504 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7aa0a074db50>` 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`.
I0425 08:18:18.550680 134917365917504 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 0x7aa0a074ba70>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7aa0a074ba70>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7aa0a074db50>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7aa0a074db50>}).
I0425 08:18:18.551014 134917365917504 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0425 08:18:18.551084 134917365917504 async_checkpointer.py:192] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7aa0a04cda80> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0425 08:18:19.418244 134917365917504 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_15_ocdbt_false/checkpoints
I0425 08:18:19.429821 134917365917504 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_main_20260425_071456/linen_xpk_main_20260425_071456_15_ocdbt_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7aa0a074c3e0>
I0425 08:18:19.429942 134917365917504 checkpointing.py:301] Checkpoint manager created!
I0425 08:18:20.360332 134917365917504 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0425 08:18:20.360459 134917365917504 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0425 08:18:20.750126 134917365917504 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn').
I0425 08:18:20.750226 134917365917504 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0425 08:18:20.766751 134917365917504 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn').
I0425 08:18:20.766812 134917365917504 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0425 08:18:20.790678 134917365917504 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 08:18:20.790746 134917365917504 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 08:18:20.807266 134917365917504 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 08:18:20.807326 134917365917504 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 08:18:20.823752 134917365917504 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 08:18:20.823813 134917365917504 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 08:18:20.848592 134917365917504 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch_attn', 'activation_length_attn', 'activation_heads', 'activation_kv').
I0425 08:18:20.848663 134917365917504 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 08:18:20.870069 134917365917504 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0425 08:18:20.870150 134917365917504 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0425 08:18:21.079671 134917365917504 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0425 08:18:21.079780 134917365917504 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0425 08:18:22.508904 134917365917504 maxtext_utils.py:1707]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  (None,)
I0425 08:18:22.509029 134917365917504 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)
I0425 08:18:22.509082 134917365917504 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)
I0425 08:18:22.509165 134917365917504 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')
I0425 08:18:22.509219 134917365917504 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)
I0425 08:18:22.509271 134917365917504 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)
I0425 08:18:22.509327 134917365917504 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)
I0425 08:18:22.509378 134917365917504 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')
I0425 08:18:22.509418 134917365917504 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)
I0425 08:18:22.509454 134917365917504 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)
I0425 08:18:22.509501 134917365917504 maxtext_utils.py:1707]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)

I0425 08:18:22.509549 134917365917504 maxtext_utils.py:1707]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')
I0425 08:18:23.004960 134917365917504 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0425 08:18:23.005054 134917365917504 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0425 08:18:23.021314 134917365917504 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0425 08:18:23.021373 134917365917504 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0425 08:18:34.099685 134917365917504 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.
I0425 08:18:34.100540 134917365917504 metric_logger.py:301] number parameters: 1.104 billion
I0425 08:18:45.802470 134917365917504 checkpointing.py:772] Waiting for step 0 to finish before checkpoint...
I0425 08:18:45.954874 134917365917504 checkpointing.py:776] Waited 0.1523878574371338 seconds for step 0 to finish before starting checkpointing.
I0425 08:18:45.957279 134917365917504 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0425 08:18:45.958943 134917365917504 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 0
I0425 08:18:45.960393 134917365917504 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_15_ocdbt_false/checkpoints/0.
I0425 08:18:46.285557 134917365917504 signaling_client.py:364] Using JaxDistributedSignalingClient
I0425 08:18:46.286504 134917365917504 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0425 08:18:46.286566 134917365917504 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
I0425 08:18:46.558972 134917365917504 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.273491s
I0425 08:18:46.559165 134917365917504 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 5.525 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2792017459869385 s) (per-host)
I0425 08:18:46.559219 134917365917504 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.279266s (batch_requests_ready=0.002394s, total_serialization_initiated=0.276800s, others=0.000072s)
I0425 08:18:46.559320 134917365917504 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.283444s (all_items=0.000018s, per_item={'items': '0.00001764'}, temp_paths=0.283426)
I0425 08:18:46.560217 134917365917504 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.60 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_15_ocdbt_false/checkpoints/0.
I0425 08:18:46.560570 134790082713344 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-25 08:38:46.560526
I0425 08:18:46.573541 134917365917504 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0425 08:18:46.573805 134787405178624 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0425 08:18:46.573955 134917365917504 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_15_ocdbt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777105125.95726, 'wait_for_prev_duration_secs': 6.270408630371094e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777105125.95898, 'checkpointer_blocking_duration_secs': 0.6017448902130127, 'get_old_steps_start_time': 1777105126.5607505, 'get_old_steps_duration_secs': 3.0517578125e-05, 'checkpoint_manager_blocking_start_time': 1777105125.9553263, 'checkpoint_manager_blocking_duration_secs': 0.6185917854309082}
I0425 08:18:46.574061 134917365917504 checkpointing.py:408] Started an asynchronous checkpoint save for step 0
I0425 08:18:46.574123 134917365917504 max_utils.py:750] 
Memstats: After params initialized:
I0425 08:18:46.574172 134917365917504 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0))
I0425 08:18:46.574208 134917365917504 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0))
I0425 08:18:46.574233 134917365917504 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0))
I0425 08:18:46.574256 134917365917504 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0))
I0425 08:18:46.890147 134917365917504 metric_logger.py:196] completed step: 0, seconds: 11.702, TFLOP/s/device: 1.161, Tokens/s/device: 175.016, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0425 08:18:47.065730 134917365917504 metric_logger.py:196] completed step: 1, seconds: 1.086, TFLOP/s/device: 12.510, Tokens/s/device: 1885.615, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0425 08:18:47.478807 134917365917504 metric_logger.py:196] completed step: 2, seconds: 0.028, TFLOP/s/device: 478.386, Tokens/s/device: 72107.598, total_weights: 65536, loss: 10.560, lm_loss: 10.560, perplexity: 38547.719
I0425 08:18:47.626318 134917365917504 metric_logger.py:196] completed step: 3, seconds: 0.413, TFLOP/s/device: 32.873, Tokens/s/device: 4954.915, total_weights: 65536, loss: 9.980, lm_loss: 9.980, perplexity: 21590.506
I0425 08:18:47.630716 134917365917504 checkpointing.py:772] Waiting for step 5 to finish before checkpoint...
I0425 08:18:47.920388 134917365917504 checkpointing.py:776] Waited 0.28963494300842285 seconds for step 5 to finish before starting checkpointing.
I0425 08:18:47.923334 134917365917504 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0425 08:18:54.684355    2800 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0425 08:18:57.115932 134787413571328 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_15_ocdbt_false/checkpoints/0/items/array_metadatas/process_6
I0425 08:19:01.708397 134790082713344 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 102.382 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 15.428394794464111 s) (per-host)
I0425 08:19:01.708522 134790082713344 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 15.147842s.
I0425 08:19:06.892085 134790082713344 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 20.331388s.
I0425 08:19:06.892387 134787405178624 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0425 08:19:06.892522 134787405178624 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0425 08:19:06.892572 134787405178624 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0425 08:19:06.894491 134787405178624 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0425 08:19:06.894676 134917365917504 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0425 08:19:06.894817 134917365917504 checkpoint_manager.py:1452] Waiting for previous save to complete took 18.971490 seconds. If this number is high, consider checkpointing less frequently.
I0425 08:19:06.896965 134917365917504 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 5
I0425 08:19:06.899485 134917365917504 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_15_ocdbt_false/checkpoints/5.
I0425 08:19:07.601954 134917365917504 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0425 08:19:07.602044 134917365917504 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
I0425 08:19:07.642388 134917365917504 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.041609s
I0425 08:19:07.642556 134917365917504 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 34.126 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04520273208618164 s) (per-host)
I0425 08:19:07.642605 134917365917504 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.045261s (batch_requests_ready=0.001933s, total_serialization_initiated=0.043263s, others=0.000066s)
I0425 08:19:07.642697 134917365917504 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.050323s (all_items=0.000015s, per_item={'items': '0.00001478'}, temp_paths=0.050308)
I0425 08:19:07.643397 134917365917504 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.75 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_15_ocdbt_false/checkpoints/5.
I0425 08:19:07.643749 134787405178624 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-25 08:39:07.643712
I0425 08:19:07.645755 134917365917504 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=5] Starting CheckpointManager Save Finalize thread=save_finalize
I0425 08:19:07.646052 134790065927936 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0425 08:19:07.646230 134917365917504 standard_logger.py:34] {'step': 5, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_15_ocdbt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777105127.9232957, 'wait_for_prev_duration_secs': 18.971489906311035, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777105146.8970053, 'checkpointer_blocking_duration_secs': 0.7468869686126709, 'get_old_steps_start_time': 1777105147.6439142, 'get_old_steps_duration_secs': 2.9802322387695312e-05, 'checkpoint_manager_blocking_start_time': 1777105127.9209979, 'checkpoint_manager_blocking_duration_secs': 19.725197315216064}
I0425 08:19:07.646346 134917365917504 checkpointing.py:408] Started an asynchronous checkpoint save for step 5
I0425 08:19:07.647174 134917365917504 metric_logger.py:196] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.833, Tokens/s/device: 13389.909, total_weights: 65536, loss: 9.460, lm_loss: 9.460, perplexity: 12840.355
I0425 08:19:07.653136 134917365917504 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.206, Tokens/s/device: 13898.220, total_weights: 65536, loss: 8.959, lm_loss: 8.959, perplexity: 7776.467
I0425 08:19:12.784091 134787413571328 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_15_ocdbt_false/checkpoints/5/items/array_metadatas/process_6
I0425 08:19:18.197857 134787405178624 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 149.012 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 10.600464105606079 s) (per-host)
I0425 08:19:18.197981 134787405178624 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 10.554120s.
I0425 08:19:23.787384 134787405178624 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 16.143506s.
I0425 08:19:23.787688 134790065927936 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0425 08:19:23.787810 134790065927936 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0425 08:19:23.787861 134790065927936 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=5] CheckpointManager Save Finalize is syncing with other hosts...
I0425 08:19:23.789408 134790065927936 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=5] CheckpointManager Save Finalize is done on all hosts.
I0425 08:19:30.072378 134917365917504 metric_logger.py:196] completed step: 6, seconds: 20.021, TFLOP/s/device: 0.679, Tokens/s/device: 102.293, total_weights: 65536, loss: 8.469, lm_loss: 8.469, perplexity: 4762.740
I0425 08:19:30.220152 134917365917504 metric_logger.py:196] completed step: 7, seconds: 22.273, TFLOP/s/device: 0.610, Tokens/s/device: 91.949, total_weights: 65536, loss: 8.003, lm_loss: 8.003, perplexity: 2989.151
I0425 08:19:30.367482 134917365917504 metric_logger.py:196] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.194, Tokens/s/device: 13444.231, total_weights: 65536, loss: 7.572, lm_loss: 7.572, perplexity: 1943.098
I0425 08:19:30.514395 134917365917504 checkpointing.py:772] Waiting for step 9 to finish before checkpoint...
I0425 08:19:30.515083 134917365917504 checkpointing.py:776] Waited 0.0007090568542480469 seconds for step 9 to finish before starting checkpointing.
I0425 08:19:30.517226 134917365917504 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0425 08:19:30.519060 134917365917504 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 9
I0425 08:19:30.520513 134917365917504 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_15_ocdbt_false/checkpoints/9.
I0425 08:19:30.864992 134917365917504 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0425 08:19:30.865087 134917365917504 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
I0425 08:19:30.906602 134917365917504 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.042471s
I0425 08:19:30.906764 134917365917504 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 33.475 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.046080827713012695 s) (per-host)
I0425 08:19:30.906815 134917365917504 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.046142s (batch_requests_ready=0.001791s, total_serialization_initiated=0.044286s, others=0.000066s)
I0425 08:19:30.906905 134917365917504 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.050250s (all_items=0.000010s, per_item={'items': '0.00001025'}, temp_paths=0.050240)
I0425 08:19:30.907608 134917365917504 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.39 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_15_ocdbt_false/checkpoints/9.
I0425 08:19:30.907888 134790065927936 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-25 08:39:30.907865
I0425 08:19:30.909758 134917365917504 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0425 08:19:30.910025 134763826329344 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0425 08:19:30.910170 134917365917504 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_15_ocdbt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777105170.517197, 'wait_for_prev_duration_secs': 7.05718994140625e-05, 'time_between_consecutive_saves_sec': 6.727750062942505, 'checkpointer_blocking_start_time': 1777105170.519111, 'checkpointer_blocking_duration_secs': 0.38887596130371094, 'get_old_steps_start_time': 1777105170.9080057, 'get_old_steps_duration_secs': 2.4318695068359375e-05, 'checkpoint_manager_blocking_start_time': 1777105170.5153325, 'checkpoint_manager_blocking_duration_secs': 0.3948078155517578}
I0425 08:19:30.910337 134917365917504 checkpointing.py:408] Started an asynchronous checkpoint save for step 9
I0425 08:19:30.910387 134917365917504 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0425 08:19:36.116246 134789554235136 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_15_ocdbt_false/checkpoints/9/items/array_metadatas/process_6
I0425 08:19:41.608429 134790065927936 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 146.971 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 10.747706174850464 s) (per-host)
I0425 08:19:41.608548 134790065927936 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 10.700585s.
I0425 08:19:47.128921 134790065927936 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 16.220942s.
I0425 08:19:47.129259 134763826329344 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0425 08:19:47.129380 134763826329344 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0425 08:19:47.129421 134763826329344 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0425 08:19:47.130747 134763826329344 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0425 08:19:47.130929 134917365917504 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9.
I0425 08:19:47.131073 134917365917504 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0425 08:19:47.132110 134917365917504 metric_logger.py:196] completed step: 9, seconds: 0.148, TFLOP/s/device: 92.061, Tokens/s/device: 13876.467, 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: Sat Apr 25 08:19:59 UTC 2026
EXIT_CODE=0
feat/nnx-set-defaults-true  ·  73213e044  ·  feat_nnx_set_defaults_true_20260425_150412  ·  full log 
XPK Start: Sat Apr 25 16:07:12 UTC 2026
2026-04-25 16:07:16.697429: 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 00:00:1777133236.710236      10 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered
E0000 00:00:1777133236.714220      10 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered
W0000 00:00:1777133236.725892      10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1777133236.725912      10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1777133236.725915      10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1777133236.725917      10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
2026-04-25 16:07:35.898396: 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)
I0425 16:07:36.420494 138979489498944 max_utils.py:273] Attempting to initialize the jax distributed system...
INFO:2026-04-25 16:07:45,466:jax._src.distributed:140: Starting JAX distributed service on [::]:8482
I0425 16:07:45.466567 138979489498944 distributed.py:140] Starting JAX distributed service on [::]:8482
INFO:2026-04-25 16:07:45,468:jax._src.distributed:157: Connecting to JAX distributed service on mt-15-ocdbt-false-sv-n1fh1-slice-job-0-0.mt-15-ocdbt-false-sv-n1fh1:8482
I0425 16:07:45.468897 138979489498944 distributed.py:157] Connecting to JAX distributed service on mt-15-ocdbt-false-sv-n1fh1-slice-job-0-0.mt-15-ocdbt-false-sv-n1fh1:8482
I0425 16:07:46.487485 138979489498944 max_utils.py:284] Jax distributed system initialized!
I0425 16:07:53.568215 138979489498944 max_utils.py:800] System Information: Jax Version: 0.8.1
I0425 16:07:53.568320 138979489498944 max_utils.py:801] System Information: Jaxlib Version: 0.8.1
I0425 16:07:53.568361 138979489498944 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
I0425 16:07:53.568397 138979489498944 train_utils.py:377] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0425 16:07:54.188718 138979489498944 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0425 16:07:54.189330 138979489498944 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0425 16:07:54.189517 138979489498944 checkpointing.py:688] Setting up checkpoint logger...
I0425 16:07:54.189567 138979489498944 checkpointing.py:234] Creating checkpoint manager with ocdbt=False and zarr3=True
I0425 16:07:54.189609 138979489498944 pytree_checkpoint_handler.py:589] save_device_host_concurrent_bytes=None
I0425 16:07:54.189951 138979489498944 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 0x7e6620b751c0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0425 16:07:57.265717 138979489498944 checkpointing.py:266] Enabling policy for fixed interval checkpointing.
I0425 16:07:57.265963 138979489498944 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 0x7e51c4131880>}, handler_registry=None
I0425 16:07:57.266208 138979489498944 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e51c4131880>` 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`.
I0425 16:07:57.266259 138979489498944 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e51c41368d0>` 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`.
I0425 16:07:57.266296 138979489498944 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 0x7e51c4131880>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e51c4131880>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e51c41368d0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e51c41368d0>}).
I0425 16:07:57.266812 138979489498944 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.33
I0425 16:07:57.266892 138979489498944 async_checkpointer.py:177] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7e5174628180> timeout: 600 secs and primary_host=0 for async checkpoint writes
I0425 16:07:59.141613 138979489498944 checkpoint_manager.py:1818] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_15_ocdbt_false/checkpoints
I0425 16:07:59.143837 138979489498944 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_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_15_ocdbt_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7e51c429d6d0>
I0425 16:07:59.143959 138979489498944 checkpointing.py:302] Checkpoint manager created!
I0425 16:08:00.048706 138979489498944 nnx_wrappers.py:455] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0425 16:08:00.048813 138979489498944 nnx_wrappers.py:455] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0425 16:08:00.420840 138979489498944 attentions.py:1084] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0425 16:08:00.420933 138979489498944 attentions.py:1084] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0425 16:08:00.436969 138979489498944 attentions.py:1085] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0425 16:08:00.437031 138979489498944 attentions.py:1085] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0425 16:08:00.460060 138979489498944 attentions.py:1150] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 16:08:00.460136 138979489498944 attentions.py:1150] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 16:08:00.476172 138979489498944 attentions.py:1151] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 16:08:00.476233 138979489498944 attentions.py:1151] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 16:08:00.492343 138979489498944 attentions.py:1152] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 16:08:00.492406 138979489498944 attentions.py:1152] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 16:08:00.517573 138979489498944 attentions.py:1193] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0425 16:08:00.517646 138979489498944 attentions.py:1193] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 16:08:00.537213 138979489498944 linears.py:541] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0425 16:08:00.537281 138979489498944 linears.py:541] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0425 16:08:00.727999 138979489498944 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint
I0425 16:08:00.728120 138979489498944 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0425 16:08:02.175552 138979489498944 maxtext_utils.py:1740]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   PartitionSpec('norm',)
    Physical:  (None,)
I0425 16:08:02.175686 138979489498944 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)
I0425 16:08:02.175742 138979489498944 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)
I0425 16:08:02.175801 138979489498944 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')
I0425 16:08:02.175853 138979489498944 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)
I0425 16:08:02.175892 138979489498944 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)
I0425 16:08:02.175945 138979489498944 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)
I0425 16:08:02.175997 138979489498944 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')
I0425 16:08:02.176037 138979489498944 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)
I0425 16:08:02.176074 138979489498944 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)
I0425 16:08:02.176168 138979489498944 maxtext_utils.py:1740]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   PartitionSpec('embed', 'vocab')
    Physical:  ('fsdp', None)
I0425 16:08:02.176238 138979489498944 maxtext_utils.py:1740]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   PartitionSpec('vocab', 'embed')

    Physical:  (None, 'fsdp')
I0425 16:08:02.674819 138979489498944 train.py:158] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0425 16:08:02.674917 138979489498944 train.py:158] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0425 16:08:02.689912 138979489498944 train.py:165] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0425 16:08:02.689979 138979489498944 train.py:165] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0425 16:08:13.358657 138979489498944 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.
I0425 16:08:13.359532 138979489498944 metric_logger.py:289] number parameters: 1.104 billion
I0425 16:08:24.677349 138979489498944 checkpointing.py:794] Waiting for step 0 to finish before checkpoint...
I0425 16:08:24.832023 138979489498944 checkpointing.py:798] Waited 0.15465426445007324 seconds for step 0 to finish before starting checkpointing.
I0425 16:08:24.834449 138979489498944 checkpoint_manager.py:2013] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0425 16:08:24.836125 138979489498944 checkpoint_manager.py:1518] [process=6] Saving checkpoint at step 0
I0425 16:08:24.839013 138979489498944 async_checkpointer.py:452] [process=6] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_15_ocdbt_false/checkpoints/0.
I0425 16:08:25.837024 138979489498944 signaling_client.py:364] Using JaxDistributedSignalingClient
I0425 16:08:25.838110 138979489498944 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array.
I0425 16:08:25.838169 138979489498944 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
I0425 16:08:26.091573 138979489498944 base_pytree_checkpoint_handler.py:153] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.254632s
I0425 16:08:26.091749 138979489498944 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.849 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.5414230823516846 s) (per-host)
I0425 16:08:26.091800 138979489498944 base_pytree_checkpoint_handler.py:737] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.541484s (batch_requests_ready=0.283213s, total_serialization_initiated=0.258203s, others=0.000068s)
I0425 16:08:26.091889 138979489498944 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.545470s (all_items=0.000019s, per_item={'items': '0.00001907'}, temp_paths=0.545451)
I0425 16:08:26.092867 138856611436288 async_checkpointer.py:79] [process=6][thread=async_save] Background save thread started.
I0425 16:08:26.093041 138979489498944 async_checkpointer.py:561] Finished blocking save. Time taken: 1.256845s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_15_ocdbt_false/checkpoints/0.
I0425 16:08:26.097442 138979489498944 checkpoint_manager.py:1566] [process=6][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0425 16:08:26.097702 138851779598080 async_checkpointer.py:265] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0425 16:08:26.097828 138979489498944 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_15_ocdbt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777133304.8344316, 'wait_for_prev_duration_secs': 7.033348083496094e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777133304.8361642, 'checkpointer_blocking_duration_secs': 1.2569985389709473, 'get_old_steps_start_time': 1777133306.0931818, 'get_old_steps_duration_secs': 2.5987625122070312e-05, 'checkpoint_manager_blocking_start_time': 1777133304.8325949, 'checkpoint_manager_blocking_duration_secs': 1.2651984691619873}
I0425 16:08:26.097929 138979489498944 checkpointing.py:409] Started an asynchronous checkpoint save for step 0
I0425 16:08:26.097981 138979489498944 max_utils.py:750] 
Memstats: After params initialized:
I0425 16:08:26.098029 138979489498944 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0))
I0425 16:08:26.098064 138979489498944 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0))
I0425 16:08:26.098092 138979489498944 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0))
I0425 16:08:26.098133 138979489498944 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0))
I0425 16:08:26.365267 138979489498944 metric_logger.py:185] completed step: 0, seconds: 11.318, TFLOP/s/device: 1.201, Tokens/s/device: 180.955, total_weights: 65536, loss: 10.874
I0425 16:08:26.536564 138979489498944 metric_logger.py:185] completed step: 1, seconds: 1.687, TFLOP/s/device: 8.056, Tokens/s/device: 1214.274, total_weights: 65536, loss: 10.874
I0425 16:08:26.932943 138979489498944 metric_logger.py:185] completed step: 2, seconds: 0.024, TFLOP/s/device: 560.895, Tokens/s/device: 84544.254, total_weights: 65536, loss: 10.560
I0425 16:08:27.080404 138979489498944 metric_logger.py:185] completed step: 3, seconds: 0.397, TFLOP/s/device: 34.254, Tokens/s/device: 5163.086, total_weights: 65536, loss: 9.980
I0425 16:08:27.084828 138979489498944 checkpointing.py:794] Waiting for step 5 to finish before checkpoint...
I0425 16:08:27.374801 138979489498944 checkpointing.py:798] Waited 0.28993725776672363 seconds for step 5 to finish before starting checkpointing.
I0425 16:08:27.377559 138979489498944 checkpoint_manager.py:2024] [process=6][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0425 16:08:28.648120    2607 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0425 16:08:30.537809 138856619828992 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_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_15_ocdbt_false/checkpoints/0/items/array_metadatas/process_6
I0425 16:08:36.334970 138856611436288 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/gbytes_per_sec: 146.468 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 10.784610271453857 s) (per-host)
I0425 16:08:36.335076 138856611436288 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 10.242095s.
I0425 16:08:42.312911 138856611436288 async_checkpointer.py:144] [process=6][thread=async_save] Background save thread done. Time taken: 16.219914s.
I0425 16:08:42.313188 138851779598080 async_checkpointer.py:273] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0425 16:08:42.313246 138851779598080 async_checkpointer.py:283] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0425 16:08:42.313292 138851779598080 checkpoint_manager.py:2133] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0425 16:08:42.314961 138851779598080 checkpoint_manager.py:2142] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0425 16:08:42.315149 138979489498944 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.
W0425 16:08:42.315287 138979489498944 checkpoint_manager.py:1458] Waiting for previous save to complete took 14.937727 seconds. If this number is high, consider checkpointing less frequently.
I0425 16:08:42.317229 138979489498944 checkpoint_manager.py:1518] [process=6] Saving checkpoint at step 5
I0425 16:08:42.321212 138979489498944 async_checkpointer.py:452] [process=6] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_15_ocdbt_false/checkpoints/5.
I0425 16:08:42.924638 138979489498944 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array.
I0425 16:08:42.924738 138979489498944 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
I0425 16:08:42.969079 138979489498944 base_pytree_checkpoint_handler.py:153] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.045713s
I0425 16:08:42.969276 138979489498944 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/blocking_gbytes_per_sec: 5.268 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2928454875946045 s) (per-host)
I0425 16:08:42.969328 138979489498944 base_pytree_checkpoint_handler.py:737] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.292909s (batch_requests_ready=0.245270s, total_serialization_initiated=0.047568s, others=0.000071s)
I0425 16:08:42.969415 138979489498944 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.297806s (all_items=0.000015s, per_item={'items': '0.00001454'}, temp_paths=0.297791)
I0425 16:08:42.970328 138846935537408 async_checkpointer.py:79] [process=6][thread=async_save] Background save thread started.
I0425 16:08:42.970458 138979489498944 async_checkpointer.py:561] Finished blocking save. Time taken: 0.653153s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_15_ocdbt_false/checkpoints/5.
I0425 16:08:42.991863 138979489498944 checkpoint_manager.py:1566] [process=6][thread=MainThread][step=5] Starting CheckpointManager Save Finalize thread=save_finalize
I0425 16:08:42.992143 138851779598080 async_checkpointer.py:265] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0425 16:08:42.992318 138979489498944 standard_logger.py:34] {'step': 5, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_15_ocdbt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777133307.3775306, 'wait_for_prev_duration_secs': 14.937726736068726, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777133322.3172681, 'checkpointer_blocking_duration_secs': 0.6533603668212891, 'get_old_steps_start_time': 1777133322.9706469, 'get_old_steps_duration_secs': 2.384185791015625e-05, 'checkpoint_manager_blocking_start_time': 1777133307.3753572, 'checkpoint_manager_blocking_duration_secs': 15.616926431655884}
I0425 16:08:42.992428 138979489498944 checkpointing.py:409] Started an asynchronous checkpoint save for step 5
I0425 16:08:42.992974 138979489498944 metric_logger.py:185] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.987, Tokens/s/device: 13413.149, total_weights: 65536, loss: 9.460
I0425 16:08:42.998582 138979489498944 metric_logger.py:185] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.304, Tokens/s/device: 13913.043, total_weights: 65536, loss: 8.959
I0425 16:09:02.298756 138979489498944 metric_logger.py:185] completed step: 6, seconds: 15.913, TFLOP/s/device: 0.854, Tokens/s/device: 128.704, total_weights: 65536, loss: 8.469
I0425 16:09:02.446111 138979489498944 metric_logger.py:185] completed step: 7, seconds: 19.154, TFLOP/s/device: 0.709, Tokens/s/device: 106.924, total_weights: 65536, loss: 8.003
I0425 16:09:02.593290 138979489498944 metric_logger.py:185] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.261, Tokens/s/device: 13454.388, total_weights: 65536, loss: 7.572
I0425 16:09:02.740396 138979489498944 checkpointing.py:794] Waiting for step 9 to finish before checkpoint...
I0425 16:09:02.741043 138979489498944 checkpointing.py:798] Waited 0.0006670951843261719 seconds for step 9 to finish before starting checkpointing.
I0425 16:09:02.743384 138979489498944 checkpoint_manager.py:2024] [process=6][thread=MainThread][step=5][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0425 16:09:06.947346 138856619828992 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_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_15_ocdbt_false/checkpoints/5/items/array_metadatas/process_6
I0425 16:09:13.039328 138846935537408 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/gbytes_per_sec: 52.024 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 30.362829446792603 s) (per-host)
I0425 16:09:13.039448 138846935537408 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 30.068910s.
I0425 16:09:19.229089 138846935537408 async_checkpointer.py:144] [process=6][thread=async_save] Background save thread done. Time taken: 36.258537s.
I0425 16:09:19.229344 138851779598080 async_checkpointer.py:273] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0425 16:09:19.229415 138851779598080 async_checkpointer.py:283] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0425 16:09:19.229462 138851779598080 checkpoint_manager.py:2133] [process=6][thread=save_finalize][step=5] CheckpointManager Save Finalize is syncing with other hosts...
I0425 16:09:19.231011 138851779598080 checkpoint_manager.py:2142] [process=6][thread=save_finalize][step=5] CheckpointManager Save Finalize is done on all hosts.
I0425 16:09:19.231201 138979489498944 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.
W0425 16:09:19.231351 138979489498944 checkpoint_manager.py:1458] Waiting for previous save to complete took 16.487979 seconds. If this number is high, consider checkpointing less frequently.
I0425 16:09:19.232636 138979489498944 checkpoint_manager.py:1518] [process=6] Saving checkpoint at step 9
I0425 16:09:19.236038 138979489498944 async_checkpointer.py:452] [process=6] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_15_ocdbt_false/checkpoints/9.
I0425 16:09:19.840986 138979489498944 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array.
I0425 16:09:19.841087 138979489498944 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
I0425 16:09:19.885449 138979489498944 base_pytree_checkpoint_handler.py:153] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.045439s
I0425 16:09:19.885622 138979489498944 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/blocking_gbytes_per_sec: 5.149 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2995870113372803 s) (per-host)
I0425 16:09:19.885671 138979489498944 base_pytree_checkpoint_handler.py:737] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.299646s (batch_requests_ready=0.252129s, total_serialization_initiated=0.047453s, others=0.000064s)
I0425 16:09:19.885759 138979489498944 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.303429s (all_items=0.000011s, per_item={'items': '0.00001121'}, temp_paths=0.303418)
I0425 16:09:19.886572 138849592391424 async_checkpointer.py:79] [process=6][thread=async_save] Background save thread started.
I0425 16:09:19.886698 138979489498944 async_checkpointer.py:561] Finished blocking save. Time taken: 0.653992s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_15_ocdbt_false/checkpoints/9.
I0425 16:09:19.894132 138979489498944 checkpoint_manager.py:1566] [process=6][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0425 16:09:19.894429 138851779598080 async_checkpointer.py:265] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0425 16:09:19.894595 138979489498944 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_15_ocdbt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777133342.7433558, 'wait_for_prev_duration_secs': 16.487979412078857, 'time_between_consecutive_saves_sec': 20.428351640701294, 'checkpointer_blocking_start_time': 1777133359.2326782, 'checkpointer_blocking_duration_secs': 0.6541900634765625, 'get_old_steps_start_time': 1777133359.8868797, 'get_old_steps_duration_secs': 2.1457672119140625e-05, 'checkpoint_manager_blocking_start_time': 1777133342.741299, 'checkpoint_manager_blocking_duration_secs': 17.153264045715332}
I0425 16:09:19.894697 138979489498944 checkpointing.py:409] Started an asynchronous checkpoint save for step 9
I0425 16:09:19.894739 138979489498944 checkpoint_manager.py:2024] [process=6][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0425 16:09:24.542628 138856619828992 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_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_15_ocdbt_false/checkpoints/9/items/array_metadatas/process_6
I0425 16:09:31.275420 138849592391424 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/gbytes_per_sec: 135.131 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 11.689341306686401 s) (per-host)
I0425 16:09:31.275529 138849592391424 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 11.388751s.
I0425 16:09:36.056492 138849592391424 async_checkpointer.py:144] [process=6][thread=async_save] Background save thread done. Time taken: 16.169698s.
I0425 16:09:36.056792 138851779598080 async_checkpointer.py:273] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0425 16:09:36.056961 138851779598080 async_checkpointer.py:283] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0425 16:09:36.057011 138851779598080 checkpoint_manager.py:2133] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0425 16:09:36.058595 138851779598080 checkpoint_manager.py:2142] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0425 16:09:36.058780 138979489498944 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.
I0425 16:09:36.058937 138979489498944 checkpoint_manager.py:2013] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0425 16:09:36.059579 138979489498944 metric_logger.py:185] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.165, Tokens/s/device: 13892.092, 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: Sat Apr 25 16:09:48 UTC 2026
EXIT_CODE=0