MaxView

XPK Start: Tue Apr 21 10:16:19 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 10:16:43.343560: 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 10:16:43.878364 136682829195072 max_utils.py:273] Attempting to initialize the jax distributed system...
I0421 10:16:52.919501 136682829195072 distributed.py:149] Starting JAX distributed service on [::]:8482
I0421 10:16:52.921838 136682829195072 distributed.py:172] Connecting to JAX distributed service on mt-04-int8-wddlh-slice-job-0-0.mt-04-int8-wddlh:8482
I0421 10:16:53.923835 136682829195072 max_utils.py:284] Jax distributed system initialized!
I0421 10:17:00.083354 136682829195072 max_utils.py:800] System Information: Jax Version: 0.9.2
I0421 10:17:00.083454 136682829195072 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0421 10:17:00.083494 136682829195072 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 10:17:00.083529 136682829195072 train_utils.py:378] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0421 10:17:00.783456 136682829195072 maxtext_utils.py:1718] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0421 10:17:01.328104 136682829195072 checkpointing.py:688] Setting up checkpoint logger...
I0421 10:17:01.328220 136682829195072 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True
I0421 10:17:01.328264 136682829195072 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0421 10:17:01.328474 136682829195072 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 0x7c4f50b7a6c0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0421 10:17:04.348750 136682829195072 checkpointing.py:266] Enabling policy for fixed interval checkpointing.
I0421 10:17:04.348983 136682829195072 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 0x7c3b244379b0>}, handler_registry=None
I0421 10:17:04.349223 136682829195072 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7c3b244379b0>` 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 10:17:04.349271 136682829195072 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7c3b2449adb0>` 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 10:17:04.349304 136682829195072 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 0x7c3b244379b0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7c3b244379b0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7c3b2449adb0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7c3b2449adb0>}).
I0421 10:17:04.349648 136682829195072 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0421 10:17:04.349721 136682829195072 async_checkpointer.py:192] [process=4][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7c3a3c53e660> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0421 10:17:05.545452 136682829195072 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_04_int8/checkpoints
I0421 10:17:05.966386 136682829195072 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_04_int8/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7c3b244622a0>
I0421 10:17:05.966554 136682829195072 checkpointing.py:302] Checkpoint manager created!
I0421 10:17:07.323411 136682829195072 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint
I0421 10:17:07.323532 136682829195072 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint.
fsdp: 32

I0421 10:17:10.077751 136682829195072 nnx_decoders.py:465] nnx_decoders/carry Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0421 10:17:10.077843 136682829195072 nnx_decoders.py:465] nnx_decoders/carry Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0421 10:17:10.084050 136682829195072 nnx_decoders.py:465] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0421 10:17:10.084154 136682829195072 nnx_decoders.py:465] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0421 10:17:10.104611 136682829195072 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0421 10:17:10.104687 136682829195072 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0421 10:17:10.120303 136682829195072 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0421 10:17:10.120368 136682829195072 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0421 10:17:10.197794 136682829195072 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 10:17:10.197879 136682829195072 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 10:17:10.213667 136682829195072 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 10:17:10.213726 136682829195072 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 10:17:10.229863 136682829195072 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 10:17:10.229924 136682829195072 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 10:17:10.260419 136682829195072 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0421 10:17:10.260484 136682829195072 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 10:17:10.339238 136682829195072 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0421 10:17:10.339326 136682829195072 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0421 10:17:24.381283 136682829195072 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.
I0421 10:17:24.385049 136682829195072 metric_logger.py:301] number parameters: 1.104 billion
I0421 10:17:38.658983 136682829195072 checkpointing.py:794] Waiting for step 0 to finish before checkpoint...
I0421 10:17:38.896880 136682829195072 checkpointing.py:798] Waited 0.23788118362426758 seconds for step 0 to finish before starting checkpointing.
I0421 10:17:38.899733 136682829195072 checkpoint_manager.py:2009] [process=4][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0421 10:17:38.901514 136682829195072 checkpoint_manager.py:1512] [process=4] Saving checkpoint at step 0
I0421 10:17:38.902971 136682829195072 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_04_int8/checkpoints/0.
I0421 10:17:39.215697 136682829195072 signaling_client.py:364] Using JaxDistributedSignalingClient
I0421 10:17:39.216680 136682829195072 jax_array_handlers.py:360] Scheduling D2H of 111 prioritized jax.Array.
I0421 10:17:39.216739 136682829195072 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 10:17:39.494765 136682829195072 base_pytree_checkpoint_handler.py:154] [process=4][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.280674s
I0421 10:17:39.494930 136682829195072 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/blocking_gbytes_per_sec: 5.223 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2953453063964844 s) (per-host)
I0421 10:17:39.494980 136682829195072 base_pytree_checkpoint_handler.py:768] [process=4][thread=MainThread] Initiated Pytree async_save. Time taken: 0.295406s (batch_requests_ready=0.004650s, total_serialization_initiated=0.290689s, others=0.000068s)
I0421 10:17:39.495096 136682829195072 composite_checkpoint_handler.py:715] [process=4][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.299710s (all_items=0.000024s, per_item={'items': '0.00002384'}, temp_paths=0.299686)
I0421 10:17:39.495934 136682829195072 event_tracking.py:125] [process=4] [async] Finished blocking save in 0.59 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_04_int8/checkpoints/0.
I0421 10:17:39.496239 136551621736192 async_checkpointer.py:76] [process=4][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-21 10:37:39.496204
I0421 10:17:39.505967 136682829195072 checkpoint_manager.py:1560] [process=4][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0421 10:17:39.506221 136550523549440 async_checkpointer.py:280] [process=4][thread=save_finalize] Waiting for background save thread=async_save.
I0421 10:17:39.506360 136682829195072 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_04_int8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776766658.8997147, 'wait_for_prev_duration_secs': 6.031990051269531e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776766658.9015517, 'checkpointer_blocking_duration_secs': 0.5948367118835449, 'get_old_steps_start_time': 1776766659.4964123, 'get_old_steps_duration_secs': 2.956390380859375e-05, 'checkpoint_manager_blocking_start_time': 1776766658.8973198, 'checkpoint_manager_blocking_duration_secs': 0.608999490737915}
I0421 10:17:39.506494 136682829195072 checkpointing.py:409] Started an asynchronous checkpoint save for step 0
I0421 10:17:39.506571 136682829195072 max_utils.py:750] 
Memstats: After params initialized:
I0421 10:17:39.506618 136682829195072 max_utils.py:756] 	Using (GB) 0.44 / 31.25 (1.408000%) on TPU_16(process=4,(0,4,0,0))
I0421 10:17:39.506662 136682829195072 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_17(process=4,(1,4,0,0))
I0421 10:17:39.506690 136682829195072 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_20(process=4,(0,5,0,0))
I0421 10:17:39.506714 136682829195072 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_21(process=4,(1,5,0,0))
I0421 10:17:39.824857 136682829195072 metric_logger.py:196] completed step: 0, seconds: 14.272, TFLOP/s/device: 0.952, Tokens/s/device: 143.497, total_weights: 65536, loss: 10.872, lm_loss: 10.872, perplexity: 52668.902
I0421 10:17:40.082692 136682829195072 metric_logger.py:196] completed step: 1, seconds: 1.163, TFLOP/s/device: 11.679, Tokens/s/device: 1760.392, total_weights: 65536, loss: 10.872, lm_loss: 10.872, perplexity: 52668.902
I0421 10:17:40.517280 136682829195072 metric_logger.py:196] completed step: 2, seconds: 0.032, TFLOP/s/device: 428.616, Tokens/s/device: 64605.678, total_weights: 65536, loss: 10.260, lm_loss: 10.260, perplexity: 28557.658
I0421 10:17:40.746710 136682829195072 metric_logger.py:196] completed step: 3, seconds: 0.414, TFLOP/s/device: 32.831, Tokens/s/device: 4948.713, total_weights: 65536, loss: 9.728, lm_loss: 9.728, perplexity: 16789.145
I0421 10:17:41.206856 136682829195072 metric_logger.py:196] completed step: 4, seconds: 0.256, TFLOP/s/device: 52.991, Tokens/s/device: 7987.333, total_weights: 65536, loss: 9.271, lm_loss: 9.271, perplexity: 10625.563
I0421 10:17:41.215630 136682829195072 metric_logger.py:196] completed step: 5, seconds: 0.230, TFLOP/s/device: 59.173, Tokens/s/device: 8919.161, total_weights: 65536, loss: 8.885, lm_loss: 8.885, perplexity: 7225.917
I0421 10:17:43.228998    2886 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0421 10:17:46.108060 136550566328064 array_metadata_store.py:203] [process=4][thread=array_type_handler] Wrote 111 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_04_int8/checkpoints/0/items/array_metadatas/process_4
I0421 10:18:08.971743 136682829195072 metric_logger.py:196] completed step: 6, seconds: 0.460, TFLOP/s/device: 29.519, Tokens/s/device: 4449.388, total_weights: 65536, loss: 8.586, lm_loss: 8.586, perplexity: 5354.806
I0421 10:18:09.200626 136682829195072 metric_logger.py:196] completed step: 7, seconds: 27.529, TFLOP/s/device: 0.494, Tokens/s/device: 74.394, total_weights: 65536, loss: 8.378, lm_loss: 8.378, perplexity: 4350.756
I0421 10:18:09.430082 136682829195072 metric_logger.py:196] completed step: 8, seconds: 0.236, TFLOP/s/device: 57.670, Tokens/s/device: 8692.663, total_weights: 65536, loss: 8.249, lm_loss: 8.249, perplexity: 3824.619
I0421 10:18:09.661148 136682829195072 checkpointing.py:794] Waiting for step 9 to finish before checkpoint...
I0421 10:18:09.662111 136682829195072 checkpointing.py:798] Waited 0.000972747802734375 seconds for step 9 to finish before starting checkpointing.
I0421 10:18:09.664219 136682829195072 checkpoint_manager.py:2020] [process=4][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0421 10:18:11.880293 136551621736192 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/gbytes_per_sec: 48.334 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 32.68068790435791 s) (per-host)
I0421 10:18:11.880398 136551621736192 async_checkpointer.py:90] [process=4][thread=async_save] 3 Handler Commit operations completed. Time taken: 32.384050s.
I0421 10:18:22.259329 136551621736192 async_checkpointer.py:160] [process=4][thread=async_save] Background save thread done. Time taken: 42.762964s.
I0421 10:18:22.259542 136550523549440 async_checkpointer.py:288] [process=4][thread=save_finalize] Done with waiting for background save thread=async_save.
I0421 10:18:22.259612 136550523549440 async_checkpointer.py:298] [process=4][thread=save_finalize] No errors found in background save thread=async_save.
I0421 10:18:22.259682 136550523549440 checkpoint_manager.py:2137] [process=4][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0421 10:18:22.262188 136550523549440 checkpoint_manager.py:2146] [process=4][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0421 10:18:22.262360 136682829195072 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 10:18:22.262497 136682829195072 checkpoint_manager.py:1452] Waiting for previous save to complete took 12.598280 seconds. If this number is high, consider checkpointing less frequently.
I0421 10:18:22.264420 136682829195072 checkpoint_manager.py:1512] [process=4] Saving checkpoint at step 9
I0421 10:18:22.266463 136682829195072 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_04_int8/checkpoints/9.
I0421 10:18:23.446780 136682829195072 jax_array_handlers.py:360] Scheduling D2H of 111 prioritized jax.Array.
I0421 10:18:23.446887 136682829195072 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 10:18:23.483522 136682829195072 base_pytree_checkpoint_handler.py:154] [process=4][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.039503s
I0421 10:18:23.483702 136682829195072 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/blocking_gbytes_per_sec: 3.025 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.510002851486206 s) (per-host)
I0421 10:18:23.483752 136682829195072 base_pytree_checkpoint_handler.py:768] [process=4][thread=MainThread] Initiated Pytree async_save. Time taken: 0.510063s (batch_requests_ready=0.004580s, total_serialization_initiated=0.505416s, others=0.000068s)
I0421 10:18:23.483870 136682829195072 composite_checkpoint_handler.py:715] [process=4][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.514303s (all_items=0.000015s, per_item={'items': '0.00001526'}, temp_paths=0.514288)
I0421 10:18:23.484540 136682829195072 event_tracking.py:125] [process=4] [async] Finished blocking save in 1.22 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_04_int8/checkpoints/9.
I0421 10:18:23.484881 136550523549440 async_checkpointer.py:76] [process=4][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-21 10:38:23.484845
I0421 10:18:23.493412 136682829195072 checkpoint_manager.py:1560] [process=4][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0421 10:18:23.493662 136526574892800 async_checkpointer.py:280] [process=4][thread=save_finalize] Waiting for background save thread=async_save.
I0421 10:18:23.493792 136682829195072 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_04_int8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776766689.6641877, 'wait_for_prev_duration_secs': 12.598280191421509, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776766702.264458, 'checkpointer_blocking_duration_secs': 1.220569372177124, 'get_old_steps_start_time': 1776766703.4850512, 'get_old_steps_duration_secs': 3.0040740966796875e-05, 'checkpoint_manager_blocking_start_time': 1776766689.6623905, 'checkpoint_manager_blocking_duration_secs': 13.83136773109436}
I0421 10:18:23.493909 136682829195072 checkpointing.py:409] Started an asynchronous checkpoint save for step 9
I0421 10:18:23.493953 136682829195072 checkpoint_manager.py:2020] [process=4][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0421 10:18:28.596324 136550566328064 array_metadata_store.py:203] [process=4][thread=array_type_handler] Wrote 111 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_04_int8/checkpoints/9/items/array_metadatas/process_4
I0421 10:19:05.011447 136550523549440 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/gbytes_per_sec: 37.576 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.03770399093628 s) (per-host)
I0421 10:19:05.011599 136550523549440 async_checkpointer.py:90] [process=4][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.526603s.
I0421 10:19:13.523683 136550523549440 async_checkpointer.py:160] [process=4][thread=async_save] Background save thread done. Time taken: 50.038674s.
I0421 10:19:13.523974 136526574892800 async_checkpointer.py:288] [process=4][thread=save_finalize] Done with waiting for background save thread=async_save.
I0421 10:19:13.524117 136526574892800 async_checkpointer.py:298] [process=4][thread=save_finalize] No errors found in background save thread=async_save.
I0421 10:19:13.524167 136526574892800 checkpoint_manager.py:2137] [process=4][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0421 10:19:13.525994 136526574892800 checkpoint_manager.py:2146] [process=4][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0421 10:19:13.526170 136682829195072 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 10:19:13.526364 136682829195072 checkpoint_manager.py:2009] [process=4][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0421 10:19:13.527338 136682829195072 metric_logger.py:196] completed step: 9, seconds: 0.229, TFLOP/s/device: 59.366, Tokens/s/device: 8948.311, 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: Tue Apr 21 10:19:24 UTC 2026
EXIT_CODE=0