XPK Start: Thu Apr 23 11:15:51 UTC 2026 PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used. `rope_parameters`'s factor field must be a float >= 1, got 40 `rope_parameters`'s beta_fast field must be a float, got 32 `rope_parameters`'s beta_slow field must be a float, got 1 DeepseekV32Config got `key=rope_scaling` in kwargs but hasn't set it as attribute. For RoPE standardization you need to set `self.rope_parameters` in model's config. 2026-04-23 11:16:16.451275: E external/local_xla/xla/stream_executor/cuda/cuda_platform.cc:51] failed call to cuInit: INTERNAL: CUDA error: Failed call to cuInit: UNKNOWN ERROR (303) I0423 11:16:16.660897 134745150850880 max_utils.py:273] Attempting to initialize the jax distributed system... I0423 11:16:25.702622 134745150850880 distributed.py:149] Starting JAX distributed service on [::]:8482 I0423 11:16:25.704891 134745150850880 distributed.py:172] Connecting to JAX distributed service on mt-02-synthetic-rnfdc-slice-job-0-0.mt-02-synthetic-rnfdc:8482 I0423 11:16:26.357348 134745150850880 max_utils.py:284] Jax distributed system initialized! I0423 11:16:31.475667 134745150850880 max_utils.py:800] System Information: Jax Version: 0.9.2 I0423 11:16:31.475774 134745150850880 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0423 11:16:31.475814 134745150850880 max_utils.py:802] System Information: Jax Backend: PJRT C API TFRT TPU v6 lite Built on Mar 4 2026 11:32:08 (1772652728) cl/878335365 I0423 11:16:31.475851 134745150850880 train_utils.py:391] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0423 11:16:32.173902 134745150850880 maxtext_utils.py:1732] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0423 11:16:32.287759 134745150850880 checkpointing.py:688] Setting up checkpoint logger... I0423 11:16:32.287876 134745150850880 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0423 11:16:32.287931 134745150850880 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0423 11:16:32.288146 134745150850880 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 0x7a8c3d718050>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0423 11:16:35.168742 134745150850880 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0423 11:16:35.169092 134745150850880 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 0x7a77a02ebb30>}, handler_registry=None I0423 11:16:35.169335 134745150850880 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7a77a02ebb30>` for item "items" and save args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>` to `_handler_registry`. I0423 11:16:35.169383 134745150850880 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a78807eadb0>` for item "metrics" and save args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>` to `_handler_registry`. I0423 11:16:35.169418 134745150850880 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 0x7a77a02ebb30>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7a77a02ebb30>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a78807eadb0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a78807eadb0>}). I0423 11:16:35.169780 134745150850880 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0423 11:16:35.169877 134745150850880 async_checkpointer.py:192] [process=5][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7a77a07234c0> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0423 11:16:36.349362 134745150850880 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260423_093806/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260423_093806_02_synthetic/checkpoints I0423 11:16:36.776783 134745150850880 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_20260423_093806/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260423_093806_02_synthetic/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7a77a07b2510> I0423 11:16:36.776965 134745150850880 checkpointing.py:302] Checkpoint manager created! I0423 11:16:37.738177 134745150850880 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0423 11:16:37.738297 134745150850880 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0423 11:16:39.522148 134745150850880 nnx_decoders.py:465] nnx_decoders/carry Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0423 11:16:39.522262 134745150850880 nnx_decoders.py:465] nnx_decoders/carry Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 11:16:39.528064 134745150850880 nnx_decoders.py:465] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0423 11:16:39.528122 134745150850880 nnx_decoders.py:465] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 11:16:39.544662 134745150850880 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 11:16:39.544721 134745150850880 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 11:16:39.560328 134745150850880 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 11:16:39.560391 134745150850880 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 11:16:39.584481 134745150850880 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 11:16:39.584550 134745150850880 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 11:16:39.600361 134745150850880 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 11:16:39.600418 134745150850880 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 11:16:39.616068 134745150850880 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 11:16:39.616127 134745150850880 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 11:16:39.647594 134745150850880 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0423 11:16:39.647680 134745150850880 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 11:16:39.667965 134745150850880 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0423 11:16:39.668032 134745150850880 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0423 11:16:51.064840 134745150850880 max_utils.py:791] Total memory size: 1.5 GB, Output size: 0.4 GB, Temp size: 1.1 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB. I0423 11:16:51.067197 134745150850880 metric_logger.py:301] number parameters: 1.104 billion I0423 11:17:02.132180 134745150850880 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0423 11:17:02.283781 134745150850880 checkpointing.py:798] Waited 0.15159058570861816 seconds for step 0 to finish before starting checkpointing. I0423 11:17:02.286231 134745150850880 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 11:17:02.287810 134745150850880 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 0 I0423 11:17:02.289805 134745150850880 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260423_093806/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260423_093806_02_synthetic/checkpoints/0. I0423 11:17:02.906935 134745150850880 signaling_client.py:364] Using JaxDistributedSignalingClient I0423 11:17:02.907885 134745150850880 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array. I0423 11:17:02.907947 134745150850880 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False I0423 11:17:03.179177 134745150850880 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.273006s I0423 11:17:03.179363 134745150850880 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 5.458 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28263282775878906 s) (per-host) I0423 11:17:03.179422 134745150850880 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.282703s (batch_requests_ready=0.003592s, total_serialization_initiated=0.279032s, others=0.000079s) I0423 11:17:03.179524 134745150850880 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.286924s (all_items=0.000018s, per_item={'items': '0.00001788'}, temp_paths=0.286906) I0423 11:17:03.180382 134745150850880 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.89 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260423_093806/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260423_093806_02_synthetic/checkpoints/0. I0423 11:17:03.180727 134619508766464 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 11:37:03.180688 I0423 11:17:03.191007 134745150850880 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0423 11:17:03.191313 134618405660416 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0423 11:17:03.191470 134745150850880 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260423_093806/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260423_093806_02_synthetic/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776943022.2862132, 'wait_for_prev_duration_secs': 6.413459777832031e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776943022.28785, 'checkpointer_blocking_duration_secs': 0.8930277824401855, 'get_old_steps_start_time': 1776943023.1809065, 'get_old_steps_duration_secs': 3.4332275390625e-05, 'checkpoint_manager_blocking_start_time': 1776943022.2841787, 'checkpoint_manager_blocking_duration_secs': 0.9072515964508057} I0423 11:17:03.191579 134745150850880 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0423 11:17:03.191659 134745150850880 max_utils.py:750] Memstats: After params initialized: I0423 11:17:03.191710 134745150850880 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_18(process=5,(2,4,0,0)) I0423 11:17:03.191744 134745150850880 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_19(process=5,(3,4,0,0)) I0423 11:17:03.191772 134745150850880 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_22(process=5,(2,5,0,0)) I0423 11:17:03.191796 134745150850880 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_23(process=5,(3,5,0,0)) I0423 11:17:03.511257 134745150850880 metric_logger.py:196] completed step: 0, seconds: 11.064, TFLOP/s/device: 1.228, Tokens/s/device: 185.107, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52786.469 I0423 11:17:03.696331 134745150850880 metric_logger.py:196] completed step: 1, seconds: 1.377, TFLOP/s/device: 9.865, Tokens/s/device: 1486.991, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52786.469 I0423 11:17:04.110734 134745150850880 metric_logger.py:196] completed step: 2, seconds: 0.039, TFLOP/s/device: 349.221, Tokens/s/device: 52638.343, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28632.133 I0423 11:17:04.258442 134745150850880 metric_logger.py:196] completed step: 3, seconds: 0.404, TFLOP/s/device: 33.621, Tokens/s/device: 5067.739, total_weights: 65536, loss: 9.732, lm_loss: 9.732, perplexity: 16855.789 I0423 11:17:04.554122 134745150850880 metric_logger.py:196] completed step: 4, seconds: 0.165, TFLOP/s/device: 82.329, Tokens/s/device: 12409.489, total_weights: 65536, loss: 9.274, lm_loss: 9.274, perplexity: 10661.594 I0423 11:17:04.561099 134745150850880 metric_logger.py:196] completed step: 5, seconds: 0.146, TFLOP/s/device: 92.852, Tokens/s/device: 13995.667, total_weights: 65536, loss: 8.888, lm_loss: 8.888, perplexity: 7245.978 I0423 11:17:06.762186 2769 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0423 11:17:08.768410 134618914125568 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260423_093806/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260423_093806_02_synthetic/checkpoints/0/items/array_metadatas/process_5 I0423 11:17:27.263378 134745150850880 metric_logger.py:196] completed step: 6, seconds: 0.296, TFLOP/s/device: 45.882, Tokens/s/device: 6915.788, total_weights: 65536, loss: 8.589, lm_loss: 8.589, perplexity: 5371.156 I0423 11:17:27.410804 134745150850880 metric_logger.py:196] completed step: 7, seconds: 22.556, TFLOP/s/device: 0.602, Tokens/s/device: 90.796, total_weights: 65536, loss: 8.380, lm_loss: 8.380, perplexity: 4360.465 I0423 11:17:27.558376 134745150850880 metric_logger.py:196] completed step: 8, seconds: 0.153, TFLOP/s/device: 88.831, Tokens/s/device: 13389.559, total_weights: 65536, loss: 8.251, lm_loss: 8.251, perplexity: 3831.256 I0423 11:17:27.706529 134745150850880 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0423 11:17:27.707190 134745150850880 checkpointing.py:798] Waited 0.0006682872772216797 seconds for step 9 to finish before starting checkpointing. I0423 11:17:27.709246 134745150850880 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 11:17:38.276811 134619508766464 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 44.647 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 35.38005971908569 s) (per-host) I0423 11:17:38.276915 134619508766464 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 35.096078s. I0423 11:17:49.733418 134619508766464 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 46.552563s. I0423 11:17:49.733743 134618405660416 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 11:17:49.733805 134618405660416 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0423 11:17:49.733854 134618405660416 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0423 11:17:49.735451 134618405660416 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0423 11:17:49.735602 134745150850880 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. W0423 11:17:49.735745 134745150850880 checkpoint_manager.py:1452] Waiting for previous save to complete took 22.026498 seconds. If this number is high, consider checkpointing less frequently. I0423 11:17:49.737611 134745150850880 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 9 I0423 11:17:49.739544 134745150850880 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260423_093806/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260423_093806_02_synthetic/checkpoints/9. I0423 11:17:50.026264 134745150850880 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array. I0423 11:17:50.026357 134745150850880 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False I0423 11:17:50.062903 134745150850880 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.038224s I0423 11:17:50.063075 134745150850880 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 33.941 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04544830322265625 s) (per-host) I0423 11:17:50.063127 134745150850880 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.045512s (batch_requests_ready=0.002904s, total_serialization_initiated=0.042536s, others=0.000072s) I0423 11:17:50.063223 134745150850880 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.049591s (all_items=0.000016s, per_item={'items': '0.00001574'}, temp_paths=0.049575) I0423 11:17:50.063954 134745150850880 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.33 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260423_093806/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260423_093806_02_synthetic/checkpoints/9. I0423 11:17:50.064297 134618405660416 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 11:37:50.064255 I0423 11:17:50.066151 134745150850880 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0423 11:17:50.066412 134591851521792 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0423 11:17:50.066545 134745150850880 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260423_093806/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260423_093806_02_synthetic/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776943047.7092178, 'wait_for_prev_duration_secs': 22.026498317718506, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776943069.737664, 'checkpointer_blocking_duration_secs': 0.32677316665649414, 'get_old_steps_start_time': 1776943070.0644581, 'get_old_steps_duration_secs': 3.0279159545898438e-05, 'checkpoint_manager_blocking_start_time': 1776943047.7074213, 'checkpoint_manager_blocking_duration_secs': 22.35909080505371} I0423 11:17:50.066721 134745150850880 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0423 11:17:50.066767 134745150850880 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 11:17:55.174408 134618914125568 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260423_093806/nnx_xpk_feat_nnx_trainstate_and_training_loop_20260423_093806_02_synthetic/checkpoints/9/items/array_metadatas/process_5 I0423 11:18:30.350034 134618405660416 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 39.164 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 40.33236813545227 s) (per-host) I0423 11:18:30.350160 134618405660416 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 40.285753s. I0423 11:18:39.824319 134618405660416 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 49.759896s. I0423 11:18:39.824678 134591851521792 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 11:18:39.824839 134591851521792 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0423 11:18:39.824898 134591851521792 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0423 11:18:39.826572 134591851521792 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0423 11:18:39.826748 134745150850880 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. I0423 11:18:39.826919 134745150850880 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 11:18:39.827881 134745150850880 metric_logger.py:196] completed step: 9, seconds: 0.148, TFLOP/s/device: 92.022, Tokens/s/device: 13870.546, 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: Thu Apr 23 11:18:52 UTC 2026 EXIT_CODE=0