MaxView

XPK Start: Tue Apr 21 10:22:37 UTC 2026
PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used.
2026-04-21 10:23:00.879999: E external/local_xla/xla/stream_executor/cuda/cuda_platform.cc:51] failed call to cuInit: INTERNAL: CUDA error: Failed call to cuInit: UNKNOWN ERROR (303)
I0421 10:23:01.412602 139676732520256 max_utils.py:273] Attempting to initialize the jax distributed system...
I0421 10:23:10.452780 139676732520256 distributed.py:149] Starting JAX distributed service on [::]:8482
I0421 10:23:10.454974 139676732520256 distributed.py:172] Connecting to JAX distributed service on mt-07-eval-cijc2-slice-job-0-0.mt-07-eval-cijc2:8482
I0421 10:23:11.683133 139676732520256 max_utils.py:284] Jax distributed system initialized!
I0421 10:23:17.906759 139676732520256 max_utils.py:800] System Information: Jax Version: 0.9.2
I0421 10:23:17.906861 139676732520256 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0421 10:23:17.906901 139676732520256 max_utils.py:802] System Information: Jax Backend: PJRT C API
TFRT TPU v6 lite
Built on Mar 4 2026 11:32:08 (1772652728) cl/878335365
I0421 10:23:17.906935 139676732520256 train_utils.py:378] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0421 10:23:18.602714 139676732520256 maxtext_utils.py:1718] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0421 10:23:18.716183 139676732520256 checkpointing.py:688] Setting up checkpoint logger...
I0421 10:23:18.716291 139676732520256 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True
I0421 10:23:18.716335 139676732520256 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0421 10:23:18.716527 139676732520256 base_pytree_checkpoint_handler.py:441] Created BasePyTreeCheckpointHandler: use_ocdbt=True, use_zarr3=True, pytree_metadata_options=PyTreeMetadataOptions(support_rich_types=False), array_metadata_store=<orbax.checkpoint._src.metadata.array_metadata_store.Store object at 0x7f084e649160>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0421 10:23:21.557553 139676732520256 checkpointing.py:266] Enabling policy for fixed interval checkpointing.
I0421 10:23:21.557802 139676732520256 checkpoint_manager.py:708] [process=4][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ef47c22c6b0>}, handler_registry=None
I0421 10:23:21.558040 139676732520256 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ef47c22c6b0>` for item "items" and save args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>` to `_handler_registry`.
I0421 10:23:21.558088 139676732520256 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ef4544361e0>` for item "metrics" and save args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>` to `_handler_registry`.
I0421 10:23:21.558123 139676732520256 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 0x7ef47c22c6b0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ef47c22c6b0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ef4544361e0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ef4544361e0>}).
I0421 10:23:21.558437 139676732520256 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0421 10:23:21.558516 139676732520256 async_checkpointer.py:192] [process=4][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7ef4544ed760> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0421 10:23:23.167562 139676732520256 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238_07_eval/checkpoints
I0421 10:23:23.584040 139676732520256 checkpoint_manager.py:929] [process=4][thread=MainThread] CheckpointManager created,  primary_host=0, CheckpointManagerOptions=CheckpointManagerOptions(save_interval_steps=1, max_to_keep=None, keep_time_interval=None, keep_period=None, should_keep_fn=None, best_fn=None, best_mode='max', keep_checkpoints_without_metrics=True, step_prefix=None, step_format_fixed_length=None, step_name_format=None, create=True, cleanup_tmp_directories=False, save_on_steps=frozenset(), single_host_load_and_broadcast=False, todelete_subdir=None, todelete_full_path=None, enable_background_delete=False, read_only=False, enable_async_checkpointing=True, async_options=None, multiprocessing_options=MultiprocessingOptions(primary_host=0, active_processes=None, barrier_sync_key_prefix=None), should_save_fn=None, file_options=FileOptions(path_permission_mode=None), save_root_metadata=True, temporary_path_class=None, save_decision_policy=FixedIntervalPolicy(interval=10), preservation_policy=LatestN(n=None), prevent_write_metrics=False, enable_should_save_is_saving_in_progress_check=True, enable_per_process_directory_creation=False, lightweight_initialize=False), root_directory=gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238_07_eval/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7ef4544212b0>
I0421 10:23:23.584220 139676732520256 checkpointing.py:302] Checkpoint manager created!
I0421 10:23:24.550632 139676732520256 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint
I0421 10:23:24.550761 139676732520256 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint.
fsdp: 32

I0421 10:23:26.350181 139676732520256 nnx_decoders.py:465] nnx_decoders/carry Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0421 10:23:26.350272 139676732520256 nnx_decoders.py:465] nnx_decoders/carry Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0421 10:23:26.355888 139676732520256 nnx_decoders.py:465] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0421 10:23:26.355943 139676732520256 nnx_decoders.py:465] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0421 10:23:26.372233 139676732520256 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0421 10:23:26.372296 139676732520256 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0421 10:23:26.388057 139676732520256 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0421 10:23:26.388115 139676732520256 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0421 10:23:26.412097 139676732520256 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0421 10:23:26.412164 139676732520256 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 10:23:26.427951 139676732520256 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0421 10:23:26.428010 139676732520256 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 10:23:26.443648 139676732520256 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0421 10:23:26.443725 139676732520256 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 10:23:26.473907 139676732520256 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0421 10:23:26.473977 139676732520256 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 10:23:26.494007 139676732520256 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0421 10:23:26.494070 139676732520256 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0421 10:23:38.000506 139676732520256 max_utils.py:791] Total memory size: 1.5 GB, Output size: 0.4 GB, Temp size: 1.1 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB.
I0421 10:23:38.002853 139676732520256 metric_logger.py:301] number parameters: 1.104 billion
I0421 10:23:49.363587 139676732520256 checkpointing.py:794] Waiting for step 0 to finish before checkpoint...
I0421 10:23:49.515680 139676732520256 checkpointing.py:798] Waited 0.15207934379577637 seconds for step 0 to finish before starting checkpointing.
I0421 10:23:49.518043 139676732520256 checkpoint_manager.py:2009] [process=4][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0421 10:23:49.519728 139676732520256 checkpoint_manager.py:1512] [process=4] Saving checkpoint at step 0
I0421 10:23:49.521047 139676732520256 event_tracking.py:70] [process=4] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238_07_eval/checkpoints/0.
I0421 10:23:50.249922 139676732520256 signaling_client.py:364] Using JaxDistributedSignalingClient
I0421 10:23:50.251002 139676732520256 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array.
I0421 10:23:50.251060 139676732520256 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False
I0421 10:23:50.532192 139676732520256 base_pytree_checkpoint_handler.py:154] [process=4][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.283058s
I0421 10:23:50.532369 139676732520256 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/blocking_gbytes_per_sec: 5.280 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.29213643074035645 s) (per-host)
I0421 10:23:50.532423 139676732520256 base_pytree_checkpoint_handler.py:768] [process=4][thread=MainThread] Initiated Pytree async_save. Time taken: 0.292198s (batch_requests_ready=0.003028s, total_serialization_initiated=0.289101s, others=0.000069s)
I0421 10:23:50.532547 139676732520256 composite_checkpoint_handler.py:715] [process=4][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.296209s (all_items=0.000017s, per_item={'items': '0.00001717'}, temp_paths=0.296192)
I0421 10:23:50.533370 139676732520256 event_tracking.py:125] [process=4] [async] Finished blocking save in 1.01 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238_07_eval/checkpoints/0.
I0421 10:23:50.533716 139548856153856 async_checkpointer.py:76] [process=4][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-21 10:43:50.533666
I0421 10:23:50.537457 139676732520256 checkpoint_manager.py:1560] [process=4][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0421 10:23:50.537766 139547732055808 async_checkpointer.py:280] [process=4][thread=save_finalize] Waiting for background save thread=async_save.
I0421 10:23:50.537927 139676732520256 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238_07_eval/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776767029.5180237, 'wait_for_prev_duration_secs': 6.270408630371094e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776767029.5197659, 'checkpointer_blocking_duration_secs': 1.014106035232544, 'get_old_steps_start_time': 1776767030.5338957, 'get_old_steps_duration_secs': 3.314018249511719e-05, 'checkpoint_manager_blocking_start_time': 1776767029.5160859, 'checkpoint_manager_blocking_duration_secs': 1.0217998027801514}
I0421 10:23:50.538038 139676732520256 checkpointing.py:409] Started an asynchronous checkpoint save for step 0
I0421 10:23:50.538105 139676732520256 max_utils.py:750] 
Memstats: After params initialized:
I0421 10:23:50.538153 139676732520256 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_16(process=4,(0,4,0,0))
I0421 10:23:50.538185 139676732520256 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_17(process=4,(1,4,0,0))
I0421 10:23:50.538211 139676732520256 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_20(process=4,(0,5,0,0))
I0421 10:23:50.538234 139676732520256 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_21(process=4,(1,5,0,0))
I0421 10:23:50.853485 139676732520256 metric_logger.py:196] completed step: 0, seconds: 11.360, TFLOP/s/device: 1.196, Tokens/s/device: 180.287, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52786.469
I0421 10:23:51.025891 139676732520256 metric_logger.py:196] completed step: 1, seconds: 1.488, TFLOP/s/device: 9.133, Tokens/s/device: 1376.583, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52786.469
I0421 10:23:51.465780 139676732520256 metric_logger.py:196] completed step: 2, seconds: 0.026, TFLOP/s/device: 514.177, Tokens/s/device: 77502.365, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28632.133
I0421 10:23:51.613398 139676732520256 metric_logger.py:196] completed step: 3, seconds: 0.430, TFLOP/s/device: 31.630, Tokens/s/device: 4767.547, total_weights: 65536, loss: 9.732, lm_loss: 9.732, perplexity: 16855.789
I0421 10:23:51.908930 139676732520256 metric_logger.py:196] completed step: 4, seconds: 0.165, TFLOP/s/device: 82.465, Tokens/s/device: 12430.051, total_weights: 65536, loss: 9.274, lm_loss: 9.274, perplexity: 10661.594
I0421 10:23:51.916154 139676732520256 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.404, Tokens/s/device: 13928.088, total_weights: 65536, loss: 8.888, lm_loss: 8.888, perplexity: 7245.978
I0421 10:23:53.962830    2819 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0421 10:23:56.393122 139547740448512 array_metadata_store.py:203] [process=4][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238_07_eval/checkpoints/0/items/array_metadatas/process_4
I0421 10:24:14.148223 139676732520256 metric_logger.py:196] completed step: 6, seconds: 0.296, TFLOP/s/device: 45.917, Tokens/s/device: 6921.047, total_weights: 65536, loss: 8.589, lm_loss: 8.589, perplexity: 5371.156
I0421 10:24:14.295899 139676732520256 metric_logger.py:196] completed step: 7, seconds: 22.085, TFLOP/s/device: 0.615, Tokens/s/device: 92.731, total_weights: 65536, loss: 8.380, lm_loss: 8.380, perplexity: 4360.465
I0421 10:24:14.443468 139676732520256 metric_logger.py:196] completed step: 8, seconds: 0.154, TFLOP/s/device: 88.207, Tokens/s/device: 13295.507, total_weights: 65536, loss: 8.251, lm_loss: 8.251, perplexity: 3831.256
I0421 10:24:14.591502 139676732520256 checkpointing.py:794] Waiting for step 9 to finish before checkpoint...
I0421 10:24:14.592168 139676732520256 checkpointing.py:798] Waited 0.0006787776947021484 seconds for step 9 to finish before starting checkpointing.
I0421 10:24:14.594238 139676732520256 checkpoint_manager.py:2020] [process=4][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0421 10:24:27.345582 139548856153856 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/gbytes_per_sec: 42.571 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 37.1053102016449 s) (per-host)
I0421 10:24:27.345709 139548856153856 async_checkpointer.py:90] [process=4][thread=async_save] 3 Handler Commit operations completed. Time taken: 36.811867s.
I0421 10:24:35.432598 139548856153856 async_checkpointer.py:160] [process=4][thread=async_save] Background save thread done. Time taken: 44.898750s.
I0421 10:24:35.432904 139547732055808 async_checkpointer.py:288] [process=4][thread=save_finalize] Done with waiting for background save thread=async_save.
I0421 10:24:35.433022 139547732055808 async_checkpointer.py:298] [process=4][thread=save_finalize] No errors found in background save thread=async_save.
I0421 10:24:35.433073 139547732055808 checkpoint_manager.py:2137] [process=4][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0421 10:24:35.435518 139547732055808 checkpoint_manager.py:2146] [process=4][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0421 10:24:35.435678 139676732520256 checkpoint_manager.py:2032] [process=4][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0421 10:24:35.435827 139676732520256 checkpoint_manager.py:1452] Waiting for previous save to complete took 20.841586 seconds. If this number is high, consider checkpointing less frequently.
I0421 10:24:35.437635 139676732520256 checkpoint_manager.py:1512] [process=4] Saving checkpoint at step 9
I0421 10:24:35.439527 139676732520256 event_tracking.py:70] [process=4] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238_07_eval/checkpoints/9.
I0421 10:24:35.751070 139676732520256 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array.
I0421 10:24:35.751194 139676732520256 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False
I0421 10:24:35.785319 139676732520256 base_pytree_checkpoint_handler.py:154] [process=4][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.036019s
I0421 10:24:35.785496 139676732520256 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/blocking_gbytes_per_sec: 35.860 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04301643371582031 s) (per-host)
I0421 10:24:35.785547 139676732520256 base_pytree_checkpoint_handler.py:768] [process=4][thread=MainThread] Initiated Pytree async_save. Time taken: 0.043077s (batch_requests_ready=0.002636s, total_serialization_initiated=0.040372s, others=0.000069s)
I0421 10:24:35.785643 139676732520256 composite_checkpoint_handler.py:715] [process=4][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.047109s (all_items=0.000014s, per_item={'items': '0.00001431'}, temp_paths=0.047094)
I0421 10:24:35.786309 139676732520256 event_tracking.py:125] [process=4] [async] Finished blocking save in 0.35 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238_07_eval/checkpoints/9.
I0421 10:24:35.786621 139547732055808 async_checkpointer.py:76] [process=4][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-21 10:44:35.786585
I0421 10:24:35.796872 139676732520256 checkpoint_manager.py:1560] [process=4][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0421 10:24:35.797169 139547740448512 async_checkpointer.py:280] [process=4][thread=save_finalize] Waiting for background save thread=async_save.
I0421 10:24:35.797340 139676732520256 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238_07_eval/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776767054.5942092, 'wait_for_prev_duration_secs': 20.841586351394653, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776767075.4376776, 'checkpointer_blocking_duration_secs': 0.3490476608276367, 'get_old_steps_start_time': 1776767075.7867482, 'get_old_steps_duration_secs': 2.7179718017578125e-05, 'checkpoint_manager_blocking_start_time': 1776767054.592396, 'checkpoint_manager_blocking_duration_secs': 21.20490598678589}
I0421 10:24:35.797461 139676732520256 checkpointing.py:409] Started an asynchronous checkpoint save for step 9
I0421 10:24:35.797507 139676732520256 checkpoint_manager.py:2020] [process=4][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0421 10:24:41.358553 139528874473216 array_metadata_store.py:203] [process=4][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238_07_eval/checkpoints/9/items/array_metadatas/process_4
I0421 10:25:17.395996 139547732055808 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/gbytes_per_sec: 37.922 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.65347647666931 s) (per-host)
I0421 10:25:17.396116 139547732055808 async_checkpointer.py:90] [process=4][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.608882s.
I0421 10:25:26.187942 139547732055808 async_checkpointer.py:160] [process=4][thread=async_save] Background save thread done. Time taken: 50.400692s.
I0421 10:25:26.188211 139547740448512 async_checkpointer.py:288] [process=4][thread=save_finalize] Done with waiting for background save thread=async_save.
I0421 10:25:26.188337 139547740448512 async_checkpointer.py:298] [process=4][thread=save_finalize] No errors found in background save thread=async_save.
I0421 10:25:26.188384 139547740448512 checkpoint_manager.py:2137] [process=4][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0421 10:25:26.190949 139547740448512 checkpoint_manager.py:2146] [process=4][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0421 10:25:26.191131 139676732520256 checkpoint_manager.py:2032] [process=4][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9.
I0421 10:25:26.191315 139676732520256 checkpoint_manager.py:2009] [process=4][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0421 10:25:26.192240 139676732520256 metric_logger.py:196] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.186, Tokens/s/device: 13895.202, total_weights: 65536, loss: 8.175, lm_loss: 8.175, perplexity: 3551.438
Per train step:
 Total TFLOPs: 13.59 
 split as 93.93% learnable weight flops and 6.07% attention flops
XPK End: Tue Apr 21 10:25:38 UTC 2026
EXIT_CODE=0