MaxView

XPK Start: Mon Apr 20 09:57:21 UTC 2026
PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used.
2026-04-20 09:57:45.980443: E external/local_xla/xla/stream_executor/cuda/cuda_platform.cc:51] failed call to cuInit: INTERNAL: CUDA error: Failed call to cuInit: UNKNOWN ERROR (303)
I0420 09:57:46.159647 133057726998336 max_utils.py:273] Attempting to initialize the jax distributed system...
I0420 09:57:55.200918 133057726998336 distributed.py:149] Starting JAX distributed service on [::]:8482
I0420 09:57:55.203222 133057726998336 distributed.py:172] Connecting to JAX distributed service on mt-04-int8-omm0k-slice-job-0-0.mt-04-int8-omm0k:8482
I0420 09:57:57.095052 133057726998336 max_utils.py:284] Jax distributed system initialized!
I0420 09:58:02.441475 133057726998336 max_utils.py:800] System Information: Jax Version: 0.9.2
I0420 09:58:02.441576 133057726998336 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0420 09:58:02.441641 133057726998336 max_utils.py:802] System Information: Jax Backend: PJRT C API
TFRT TPU v6 lite
Built on Mar 4 2026 11:32:08 (1772652728) cl/878335365
I0420 09:58:02.441675 133057726998336 train_utils.py:378] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0420 09:58:03.496916 133057726998336 maxtext_utils.py:1718] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0420 09:58:04.055137 133057726998336 checkpointing.py:688] Setting up checkpoint logger...
I0420 09:58:04.055251 133057726998336 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True
I0420 09:58:04.055295 133057726998336 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0420 09:58:04.055498 133057726998336 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 0x79034cb18620>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0420 09:58:07.187301 133057726998336 checkpointing.py:266] Enabling policy for fixed interval checkpointing.
I0420 09:58:07.187538 133057726998336 checkpoint_manager.py:708] [process=5][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7902271890a0>}, handler_registry=None
I0420 09:58:07.187792 133057726998336 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7902271890a0>` for item "items" and save args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>` to `_handler_registry`.
I0420 09:58:07.187841 133057726998336 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x78eeac486990>` for item "metrics" and save args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>` to `_handler_registry`.
I0420 09:58:07.187880 133057726998336 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 0x7902271890a0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7902271890a0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x78eeac486990>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x78eeac486990>}).
I0420 09:58:07.188194 133057726998336 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0420 09:58:07.188264 133057726998336 async_checkpointer.py:192] [process=5][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x78eeac45c860> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0420 09:58:07.902466 133057726998336 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533_04_int8/checkpoints
I0420 09:58:07.917798 133057726998336 checkpoint_manager.py:929] [process=5][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_20260420_081533/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533_04_int8/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x78eeac484e60>
I0420 09:58:07.917927 133057726998336 checkpointing.py:302] Checkpoint manager created!
I0420 09:58:09.286654 133057726998336 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint
I0420 09:58:09.286773 133057726998336 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint.
fsdp: 32

I0420 09:58:12.024459 133057726998336 nnx_decoders.py:465] nnx_decoders/carry Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0420 09:58:12.024552 133057726998336 nnx_decoders.py:465] nnx_decoders/carry Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0420 09:58:12.030030 133057726998336 nnx_decoders.py:465] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0420 09:58:12.030086 133057726998336 nnx_decoders.py:465] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0420 09:58:12.046174 133057726998336 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0420 09:58:12.046241 133057726998336 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0420 09:58:12.061661 133057726998336 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0420 09:58:12.061718 133057726998336 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0420 09:58:12.139230 133057726998336 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0420 09:58:12.139321 133057726998336 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0420 09:58:12.154967 133057726998336 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0420 09:58:12.155024 133057726998336 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0420 09:58:12.170560 133057726998336 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0420 09:58:12.170631 133057726998336 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0420 09:58:12.200043 133057726998336 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0420 09:58:12.200115 133057726998336 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0420 09:58:12.279219 133057726998336 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0420 09:58:12.279304 133057726998336 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0420 09:58:26.630174 133057726998336 max_utils.py:791] Total memory size: 1.8 GB, Output size: 0.4 GB, Temp size: 1.4 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB.
I0420 09:58:26.633724 133057726998336 metric_logger.py:301] number parameters: 1.104 billion
I0420 09:58:41.354340 133057726998336 checkpointing.py:794] Waiting for step 0 to finish before checkpoint...
I0420 09:58:41.591248 133057726998336 checkpointing.py:798] Waited 0.236893892288208 seconds for step 0 to finish before starting checkpointing.
I0420 09:58:41.593747 133057726998336 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0420 09:58:41.595495 133057726998336 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 0
I0420 09:58:41.596912 133057726998336 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533_04_int8/checkpoints/0.
I0420 09:58:41.950323 133057726998336 signaling_client.py:364] Using JaxDistributedSignalingClient
I0420 09:58:41.951248 133057726998336 jax_array_handlers.py:360] Scheduling D2H of 111 prioritized jax.Array.
I0420 09:58:41.951309 133057726998336 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False
I0420 09:58:42.229169 133057726998336 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.280476s
I0420 09:58:42.229346 133057726998336 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 5.225 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.29523134231567383 s) (per-host)
I0420 09:58:42.229398 133057726998336 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.295294s (batch_requests_ready=0.004510s, total_serialization_initiated=0.290713s, others=0.000070s)
I0420 09:58:42.229515 133057726998336 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.299441s (all_items=0.000019s, per_item={'items': '0.00001884'}, temp_paths=0.299422)
I0420 09:58:42.230395 133057726998336 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.63 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533_04_int8/checkpoints/0.
I0420 09:58:42.230702 132929590839040 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-20 10:18:42.230669
I0420 09:58:42.241834 133057726998336 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0420 09:58:42.242107 132927920043776 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save.
I0420 09:58:42.242234 133057726998336 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533_04_int8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776679121.593729, 'wait_for_prev_duration_secs': 6.031990051269531e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776679121.595533, 'checkpointer_blocking_duration_secs': 0.635329008102417, 'get_old_steps_start_time': 1776679122.2308893, 'get_old_steps_duration_secs': 2.9325485229492188e-05, 'checkpoint_manager_blocking_start_time': 1776679121.591904, 'checkpoint_manager_blocking_duration_secs': 0.6502914428710938}
I0420 09:58:42.242352 133057726998336 checkpointing.py:409] Started an asynchronous checkpoint save for step 0
I0420 09:58:42.242434 133057726998336 max_utils.py:750] 
Memstats: After params initialized:
I0420 09:58:42.242488 133057726998336 max_utils.py:756] 	Using (GB) 0.44 / 31.25 (1.408000%) on TPU_18(process=5,(2,4,0,0))
I0420 09:58:42.242522 133057726998336 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_19(process=5,(3,4,0,0))
I0420 09:58:42.242549 133057726998336 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_22(process=5,(2,5,0,0))
I0420 09:58:42.242574 133057726998336 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_23(process=5,(3,5,0,0))
I0420 09:58:42.565689 133057726998336 metric_logger.py:196] completed step: 0, seconds: 14.719, TFLOP/s/device: 0.923, Tokens/s/device: 139.143, total_weights: 65536, loss: 10.872, lm_loss: 10.872, perplexity: 52668.902
I0420 09:58:42.810619 133057726998336 metric_logger.py:196] completed step: 1, seconds: 1.209, TFLOP/s/device: 11.238, Tokens/s/device: 1693.989, total_weights: 65536, loss: 10.872, lm_loss: 10.872, perplexity: 52668.902
I0420 09:58:43.256073 133057726998336 metric_logger.py:196] completed step: 2, seconds: 0.019, TFLOP/s/device: 704.252, Tokens/s/device: 106152.491, total_weights: 65536, loss: 10.260, lm_loss: 10.260, perplexity: 28557.658
I0420 09:58:43.485360 133057726998336 metric_logger.py:196] completed step: 3, seconds: 0.424, TFLOP/s/device: 32.041, Tokens/s/device: 4829.574, total_weights: 65536, loss: 9.728, lm_loss: 9.728, perplexity: 16789.145
I0420 09:58:43.944941 133057726998336 metric_logger.py:196] completed step: 4, seconds: 0.257, TFLOP/s/device: 52.952, Tokens/s/device: 7981.480, total_weights: 65536, loss: 9.271, lm_loss: 9.271, perplexity: 10625.563
I0420 09:58:43.953796 133057726998336 metric_logger.py:196] completed step: 5, seconds: 0.229, TFLOP/s/device: 59.285, Tokens/s/device: 8936.129, total_weights: 65536, loss: 8.885, lm_loss: 8.885, perplexity: 7225.917
I0420 09:58:45.183994    2872 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0420 09:58:47.627731 132927928436480 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 111 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533_04_int8/checkpoints/0/items/array_metadatas/process_5
I0420 09:59:12.604520 133057726998336 metric_logger.py:196] completed step: 6, seconds: 0.460, TFLOP/s/device: 29.550, Tokens/s/device: 4454.110, total_weights: 65536, loss: 8.586, lm_loss: 8.586, perplexity: 5354.806
I0420 09:59:12.833815 133057726998336 metric_logger.py:196] completed step: 7, seconds: 28.424, TFLOP/s/device: 0.478, Tokens/s/device: 72.052, total_weights: 65536, loss: 8.378, lm_loss: 8.378, perplexity: 4350.756
I0420 09:59:13.063068 133057726998336 metric_logger.py:196] completed step: 8, seconds: 0.236, TFLOP/s/device: 57.686, Tokens/s/device: 8695.061, total_weights: 65536, loss: 8.249, lm_loss: 8.249, perplexity: 3824.619
I0420 09:59:13.293903 133057726998336 checkpointing.py:794] Waiting for step 9 to finish before checkpoint...
I0420 09:59:13.294826 133057726998336 checkpointing.py:798] Waited 0.0009336471557617188 seconds for step 9 to finish before starting checkpointing.
I0420 09:59:13.297177 133057726998336 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0420 09:59:15.403491 132929590839040 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 47.195 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 33.469337940216064 s) (per-host)
I0420 09:59:15.403625 132929590839040 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 33.172808s.
I0420 09:59:24.727956 132929590839040 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 42.497123s.
I0420 09:59:24.728200 132927920043776 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save.
I0420 09:59:24.728257 132927920043776 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save.
I0420 09:59:24.728306 132927920043776 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0420 09:59:24.729967 132927920043776 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0420 09:59:24.730176 133057726998336 checkpoint_manager.py:2032] [process=5][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0420 09:59:24.730314 133057726998336 checkpoint_manager.py:1452] Waiting for previous save to complete took 11.433137 seconds. If this number is high, consider checkpointing less frequently.
I0420 09:59:24.732006 133057726998336 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 9
I0420 09:59:24.734014 133057726998336 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533_04_int8/checkpoints/9.
I0420 09:59:25.514998 133057726998336 jax_array_handlers.py:360] Scheduling D2H of 111 prioritized jax.Array.
I0420 09:59:25.515093 133057726998336 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False
I0420 09:59:25.557768 133057726998336 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.045272s
I0420 09:59:25.557936 133057726998336 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 26.954 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.05723071098327637 s) (per-host)
I0420 09:59:25.557988 133057726998336 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.057292s (batch_requests_ready=0.004199s, total_serialization_initiated=0.053023s, others=0.000070s)
I0420 09:59:25.558107 133057726998336 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.061881s (all_items=0.000015s, per_item={'items': '0.00001550'}, temp_paths=0.061865)
I0420 09:59:25.558854 133057726998336 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.83 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533_04_int8/checkpoints/9.
I0420 09:59:25.559217 132927920043776 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-20 10:19:25.559180
I0420 09:59:25.561324 133057726998336 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0420 09:59:25.561641 132927928436480 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save.
I0420 09:59:25.561806 133057726998336 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533_04_int8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776679153.2971473, 'wait_for_prev_duration_secs': 11.433136701583862, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776679164.7320457, 'checkpointer_blocking_duration_secs': 0.8273279666900635, 'get_old_steps_start_time': 1776679165.5593982, 'get_old_steps_duration_secs': 3.218650817871094e-05, 'checkpoint_manager_blocking_start_time': 1776679153.2951057, 'checkpoint_manager_blocking_duration_secs': 12.266664743423462}
I0420 09:59:25.561933 133057726998336 checkpointing.py:409] Started an asynchronous checkpoint save for step 9
I0420 09:59:25.561979 133057726998336 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0420 09:59:31.928272 132902025148160 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 111 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260420_081533_04_int8/checkpoints/9/items/array_metadatas/process_5
I0420 10:00:07.791196 132927920043776 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 37.351 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.2904372215271 s) (per-host)
I0420 10:00:07.791319 132927920043776 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.231983s.
I0420 10:00:14.423254 132927920043776 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 48.863904s.
I0420 10:00:14.423539 132927928436480 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save.
I0420 10:00:14.423680 132927928436480 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save.
I0420 10:00:14.423728 132927928436480 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0420 10:00:14.425111 132927928436480 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0420 10:00:14.425305 133057726998336 checkpoint_manager.py:2032] [process=5][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9.
I0420 10:00:14.425484 133057726998336 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0420 10:00:14.426433 133057726998336 metric_logger.py:196] completed step: 9, seconds: 0.229, TFLOP/s/device: 59.286, Tokens/s/device: 8936.285, total_weights: 65536, loss: 8.174, lm_loss: 8.174, perplexity: 3546.104
Per train step:
 Total TFLOPs: 13.59 
 split as 93.93% learnable weight flops and 6.07% attention flops
XPK End: Mon Apr 20 10:00:27 UTC 2026
EXIT_CODE=0