XPK Start: Mon Apr 20 18:31:41 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 18:32:05.776920: 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 18:32:05.956136 139737188927296 max_utils.py:273] Attempting to initialize the jax distributed system... I0420 18:32:14.998115 139737188927296 distributed.py:149] Starting JAX distributed service on [::]:8482 I0420 18:32:15.000745 139737188927296 distributed.py:172] Connecting to JAX distributed service on mt-15-ocdbt-true-rs-a8ulr-slice-job-0-0.mt-15-ocdbt-true-rs-a8ulr:8482 I0420 18:32:16.326895 139737188927296 max_utils.py:284] Jax distributed system initialized! I0420 18:32:22.359342 139737188927296 max_utils.py:800] System Information: Jax Version: 0.9.2 I0420 18:32:22.359440 139737188927296 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0420 18:32:22.359481 139737188927296 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 18:32:22.359516 139737188927296 train_utils.py:378] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0420 18:32:23.061514 139737188927296 maxtext_utils.py:1718] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0420 18:32:23.174546 139737188927296 checkpointing.py:688] Setting up checkpoint logger... I0420 18:32:23.174657 139737188927296 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0420 18:32:23.174700 139737188927296 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0420 18:32:23.174904 139737188927296 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 0x7f168d58a240>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0420 18:32:24.491889 139737188927296 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0420 18:32:24.492120 139737188927296 checkpoint_manager.py:708] [process=7][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7f013c72c1d0>}, handler_registry=None I0420 18:32:24.492367 139737188927296 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7f013c72c1d0>` 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 18:32:24.492414 139737188927296 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7f022c6a2030>` 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 18:32:24.492449 139737188927296 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 0x7f013c72c1d0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7f013c72c1d0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7f022c6a2030>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7f022c6a2030>}). I0420 18:32:24.492760 139737188927296 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0420 18:32:24.492833 139737188927296 async_checkpointer.py:192] [process=7][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7f022c48cfe0> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0420 18:32:27.438716 139616023734016 checkpoint.py:228] Read Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776709726196273296, 'commit_timestamp_nsecs': 1776709773613283435, 'custom_metadata': {}} from gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/nnx_xpk_feat_nnx_post_train_fixes_20260420_153543_15_ocdbt_true/checkpoints/5/_CHECKPOINT_METADATA I0420 18:32:27.694442 139616023734016 checkpoint_manager.py:1871] Missing metrics for step 5 I0420 18:32:27.961024 139737188927296 checkpoint_manager.py:1812] Found 3 checkpoint steps in gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/nnx_xpk_feat_nnx_post_train_fixes_20260420_153543_15_ocdbt_true/checkpoints I0420 18:32:27.963883 139737188927296 checkpoint_manager.py:929] [process=7][thread=MainThread] CheckpointManager created, primary_host=0, CheckpointManagerOptions=CheckpointManagerOptions(save_interval_steps=1, max_to_keep=None, keep_time_interval=None, keep_period=None, should_keep_fn=None, best_fn=None, best_mode='max', keep_checkpoints_without_metrics=True, step_prefix=None, step_format_fixed_length=None, step_name_format=None, create=True, cleanup_tmp_directories=False, save_on_steps=frozenset(), single_host_load_and_broadcast=False, todelete_subdir=None, todelete_full_path=None, enable_background_delete=False, read_only=False, enable_async_checkpointing=True, async_options=None, multiprocessing_options=MultiprocessingOptions(primary_host=0, active_processes=None, barrier_sync_key_prefix=None), should_save_fn=None, file_options=FileOptions(path_permission_mode=None), save_root_metadata=True, temporary_path_class=None, save_decision_policy=FixedIntervalPolicy(interval=5), preservation_policy=LatestN(n=None), prevent_write_metrics=False, enable_should_save_is_saving_in_progress_check=True, enable_per_process_directory_creation=False, lightweight_initialize=False), root_directory=gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/nnx_xpk_feat_nnx_post_train_fixes_20260420_153543_15_ocdbt_true/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7f013c797800> I0420 18:32:27.963998 139737188927296 checkpointing.py:302] Checkpoint manager created! I0420 18:32:28.916824 139737188927296 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0420 18:32:28.916939 139737188927296 checkpointing.py:582] restoring from this run's directory step 9 I0420 18:32:29.170618 139737188927296 event_tracking.py:70] [process=7] [sync] Started load checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/nnx_xpk_feat_nnx_post_train_fixes_20260420_153543_15_ocdbt_true/checkpoints/9. I0420 18:32:29.428402 139737188927296 checkpointer.py:307] Restoring checkpoint from gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/nnx_xpk_feat_nnx_post_train_fixes_20260420_153543_15_ocdbt_true/checkpoints/9. I0420 18:32:29.428808 139737188927296 event_tracking.py:125] [process=7] [sync] Finished blocking load in 0.26 seconds. Continuing load @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/nnx_xpk_feat_nnx_post_train_fixes_20260420_153543_15_ocdbt_true/checkpoints/9. I0420 18:32:31.264993 1448 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0420 18:32:38.334807 139737188927296 jax_array_handlers.py:843] [process=7] /jax/orbax/read/worker/io/requested throughput: 223.303 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 7.0768349170684814 s) (per-host) I0420 18:32:38.343444 139737188927296 base_pytree_checkpoint_handler.py:130] [process=7] /jax/checkpoint/read/gbytes_per_sec: 199.764 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 7.922355651855469 s) (per-host) I0420 18:32:39.972237 139737188927296 event_tracking.py:138] [process=7] [sync] Finished load in 10.80 seconds @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/nnx_xpk_feat_nnx_post_train_fixes_20260420_153543_15_ocdbt_true/checkpoints/9 I0420 18:32:39.972386 139737188927296 standard_logger.py:34] {'step': 9, 'event_type': 'restore', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/nnx_xpk_feat_nnx_post_train_fixes_20260420_153543_15_ocdbt_true/checkpoints', 'checkpointer_start_time': 1776709949.170522, 'checkpointer_duration_secs': 10.801831722259521, 'checkpoint_manager_start_time': 1776709948.9175396, 'checkpoint_manager_duration_secs': 11.054816246032715} fsdp: 32 I0420 18:32:40.047155 139737188927296 maxtext_utils.py:1836] decoder/decoder_norm/scale/value Shape: float32[2048] Physical: (None,) I0420 18:32:40.047265 139737188927296 maxtext_utils.py:1836] decoder/layers/mlp/wi_0/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0420 18:32:40.047315 139737188927296 maxtext_utils.py:1836] decoder/layers/mlp/wi_1/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0420 18:32:40.047355 139737188927296 maxtext_utils.py:1836] decoder/layers/mlp/wo/kernel/value Shape: float32[7168,16,2048] Physical: (None, None, 'fsdp') I0420 18:32:40.047390 139737188927296 maxtext_utils.py:1836] decoder/layers/post_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0420 18:32:40.047423 139737188927296 maxtext_utils.py:1836] decoder/layers/pre_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0420 18:32:40.047457 139737188927296 maxtext_utils.py:1836] decoder/layers/self_attention/key/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0420 18:32:40.047491 139737188927296 maxtext_utils.py:1836] decoder/layers/self_attention/out/kernel/value Shape: float32[16,16,128,2048] Physical: (None, None, None, 'fsdp') I0420 18:32:40.047524 139737188927296 maxtext_utils.py:1836] decoder/layers/self_attention/query/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0420 18:32:40.047556 139737188927296 maxtext_utils.py:1836] decoder/layers/self_attention/value/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0420 18:32:40.047587 139737188927296 maxtext_utils.py:1836] decoder/logits_dense/kernel/value Shape: float32[2048,32000] Physical: ('fsdp', None) I0420 18:32:40.047619 139737188927296 maxtext_utils.py:1836] token_embedder/embedding/value Shape: float32[32000,2048] Physical: (None, 'fsdp') I0420 18:32:40.449806 139737188927296 nnx_decoders.py:465] nnx_decoders/carry Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0420 18:32:40.449902 139737188927296 nnx_decoders.py:465] nnx_decoders/carry Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0420 18:32:40.455353 139737188927296 nnx_decoders.py:465] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0420 18:32:40.455409 139737188927296 nnx_decoders.py:465] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0420 18:32:40.471469 139737188927296 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0420 18:32:40.471529 139737188927296 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0420 18:32:40.486958 139737188927296 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0420 18:32:40.487015 139737188927296 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0420 18:32:40.511530 139737188927296 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 18:32:40.511593 139737188927296 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0420 18:32:40.527189 139737188927296 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 18:32:40.527248 139737188927296 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0420 18:32:40.542693 139737188927296 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 18:32:40.542756 139737188927296 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0420 18:32:40.572296 139737188927296 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0420 18:32:40.572365 139737188927296 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0420 18:32:40.591831 139737188927296 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0420 18:32:40.591891 139737188927296 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0420 18:32:52.060832 139737188927296 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. I0420 18:32:52.063134 139737188927296 metric_logger.py:301] number parameters: 1.104 billion I0420 18:33:03.577297 139737188927296 checkpointing.py:794] Waiting for step 10 to finish before checkpoint... I0420 18:33:03.729202 139737188927296 checkpointing.py:798] Waited 0.1518714427947998 seconds for step 10 to finish before starting checkpointing. I0420 18:33:03.731481 139737188927296 checkpoint_manager.py:2009] [process=7][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0420 18:33:03.733290 139737188927296 checkpoint_manager.py:1512] [process=7] Saving checkpoint at step 10 I0420 18:33:03.734665 139737188927296 event_tracking.py:70] [process=7] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/nnx_xpk_feat_nnx_post_train_fixes_20260420_153543_15_ocdbt_true/checkpoints/10. I0420 18:33:04.073167 139737188927296 signaling_client.py:364] Using JaxDistributedSignalingClient I0420 18:33:04.074195 139737188927296 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array. I0420 18:33:04.074251 139737188927296 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 18:33:04.353830 139737188927296 base_pytree_checkpoint_handler.py:154] [process=7][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.281425s I0420 18:33:04.354007 139737188927296 base_pytree_checkpoint_handler.py:130] [process=7] /jax/orbax/write/blocking_gbytes_per_sec: 5.349 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2884047031402588 s) (per-host) I0420 18:33:04.354061 139737188927296 base_pytree_checkpoint_handler.py:768] [process=7][thread=MainThread] Initiated Pytree async_save. Time taken: 0.288469s (batch_requests_ready=0.002707s, total_serialization_initiated=0.285691s, others=0.000072s) I0420 18:33:04.354174 139737188927296 composite_checkpoint_handler.py:715] [process=7][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.292654s (all_items=0.000016s, per_item={'items': '0.00001621'}, temp_paths=0.292638) I0420 18:33:04.354900 139737188927296 event_tracking.py:125] [process=7] [async] Finished blocking save in 0.62 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/nnx_xpk_feat_nnx_post_train_fixes_20260420_153543_15_ocdbt_true/checkpoints/10. I0420 18:33:04.355254 139614606055168 async_checkpointer.py:76] [process=7][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-20 18:53:04.355215 I0420 18:33:04.359772 139737188927296 checkpoint_manager.py:1560] [process=7][thread=MainThread][step=10] Starting CheckpointManager Save Finalize thread=save_finalize I0420 18:33:04.360033 139611355465472 async_checkpointer.py:280] [process=7][thread=save_finalize] Waiting for background save thread=async_save. I0420 18:33:04.360164 139737188927296 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/nnx_xpk_feat_nnx_post_train_fixes_20260420_153543_15_ocdbt_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776709983.7314615, 'wait_for_prev_duration_secs': 6.031990051269531e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776709983.7333288, 'checkpointer_blocking_duration_secs': 0.6220822334289551, 'get_old_steps_start_time': 1776709984.355436, 'get_old_steps_duration_secs': 3.3855438232421875e-05, 'checkpoint_manager_blocking_start_time': 1776709983.7295613, 'checkpoint_manager_blocking_duration_secs': 0.6305558681488037} I0420 18:33:04.360272 139737188927296 checkpointing.py:409] Started an asynchronous checkpoint save for step 10 I0420 18:33:04.360341 139737188927296 max_utils.py:750] Memstats: After params initialized: I0420 18:33:04.360389 139737188927296 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_26(process=7,(2,6,0,0)) I0420 18:33:04.360420 139737188927296 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_27(process=7,(3,6,0,0)) I0420 18:33:04.360447 139737188927296 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_30(process=7,(2,7,0,0)) I0420 18:33:04.360471 139737188927296 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_31(process=7,(3,7,0,0)) I0420 18:33:04.683088 139737188927296 metric_logger.py:196] completed step: 10, seconds: 11.513, TFLOP/s/device: 1.180, Tokens/s/device: 177.884, total_weights: 65536, loss: 6.827, lm_loss: 6.827, perplexity: 922.537 I0420 18:33:04.872061 139737188927296 metric_logger.py:196] completed step: 11, seconds: 1.104, TFLOP/s/device: 12.308, Tokens/s/device: 1855.239, total_weights: 65536, loss: 6.522, lm_loss: 6.522, perplexity: 679.821 I0420 18:33:05.019975 139737188927296 metric_logger.py:196] completed step: 12, seconds: 0.032, TFLOP/s/device: 422.105, Tokens/s/device: 63624.219, total_weights: 65536, loss: 6.260, lm_loss: 6.260, perplexity: 523.013 I0420 18:33:05.167699 139737188927296 metric_logger.py:196] completed step: 13, seconds: 0.166, TFLOP/s/device: 81.856, Tokens/s/device: 12338.167, total_weights: 65536, loss: 6.039, lm_loss: 6.039, perplexity: 419.520 I0420 18:33:05.174361 139737188927296 checkpointing.py:794] Waiting for step 15 to finish before checkpoint... I0420 18:33:05.462263 139737188927296 checkpointing.py:798] Waited 0.2878725528717041 seconds for step 15 to finish before starting checkpointing. I0420 18:33:05.465012 139737188927296 checkpoint_manager.py:2020] [process=7][thread=MainThread][step=10][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0420 18:33:09.780201 139611393222400 array_metadata_store.py:203] [process=7][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/nnx_xpk_feat_nnx_post_train_fixes_20260420_153543_15_ocdbt_true/checkpoints/10/items/array_metadatas/process_7 I0420 18:33:45.638264 139614606055168 base_pytree_checkpoint_handler.py:130] [process=7] /jax/orbax/write/gbytes_per_sec: 37.996 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.572625398635864 s) (per-host) I0420 18:33:45.638387 139614606055168 async_checkpointer.py:90] [process=7][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.283015s. I0420 18:33:53.412602 139614606055168 async_checkpointer.py:160] [process=7][thread=async_save] Background save thread done. Time taken: 49.057213s. I0420 18:33:53.412907 139611355465472 async_checkpointer.py:288] [process=7][thread=save_finalize] Done with waiting for background save thread=async_save. I0420 18:33:53.413033 139611355465472 async_checkpointer.py:298] [process=7][thread=save_finalize] No errors found in background save thread=async_save. I0420 18:33:53.413082 139611355465472 checkpoint_manager.py:2137] [process=7][thread=save_finalize][step=10] CheckpointManager Save Finalize is syncing with other hosts... I0420 18:33:53.414663 139611355465472 checkpoint_manager.py:2146] [process=7][thread=save_finalize][step=10] CheckpointManager Save Finalize is done on all hosts. I0420 18:33:53.414826 139737188927296 checkpoint_manager.py:2032] [process=7][thread=MainThread][step=10][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=10. W0420 18:33:53.414967 139737188927296 checkpoint_manager.py:1452] Waiting for previous save to complete took 47.949955 seconds. If this number is high, consider checkpointing less frequently. I0420 18:33:53.416770 139737188927296 checkpoint_manager.py:1512] [process=7] Saving checkpoint at step 15 I0420 18:33:53.419325 139737188927296 event_tracking.py:70] [process=7] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/nnx_xpk_feat_nnx_post_train_fixes_20260420_153543_15_ocdbt_true/checkpoints/15. I0420 18:33:54.148127 139737188927296 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array. I0420 18:33:54.148239 139737188927296 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 18:33:54.174256 139737188927296 base_pytree_checkpoint_handler.py:154] [process=7][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.027702s I0420 18:33:54.174384 139737188927296 base_pytree_checkpoint_handler.py:130] [process=7] /jax/orbax/write/blocking_gbytes_per_sec: 44.454 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.03470015525817871 s) (per-host) I0420 18:33:54.174432 139737188927296 base_pytree_checkpoint_handler.py:768] [process=7][thread=MainThread] Initiated Pytree async_save. Time taken: 0.034756s (batch_requests_ready=0.002822s, total_serialization_initiated=0.031872s, others=0.000062s) I0420 18:33:54.174506 139737188927296 composite_checkpoint_handler.py:715] [process=7][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.039866s (all_items=0.000014s, per_item={'items': '0.00001383'}, temp_paths=0.039852) I0420 18:33:54.175193 139737188927296 event_tracking.py:125] [process=7] [async] Finished blocking save in 0.76 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/nnx_xpk_feat_nnx_post_train_fixes_20260420_153543_15_ocdbt_true/checkpoints/15. I0420 18:33:54.175512 139611355465472 async_checkpointer.py:76] [process=7][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-20 18:53:54.175476 I0420 18:33:54.202093 139737188927296 checkpoint_manager.py:1560] [process=7][thread=MainThread][step=15] Starting CheckpointManager Save Finalize thread=save_finalize I0420 18:33:54.202414 139611393222400 async_checkpointer.py:280] [process=7][thread=save_finalize] Waiting for background save thread=async_save. I0420 18:33:54.202575 139737188927296 standard_logger.py:34] {'step': 15, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/nnx_xpk_feat_nnx_post_train_fixes_20260420_153543_15_ocdbt_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776709985.464982, 'wait_for_prev_duration_secs': 47.94995450973511, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776710033.416811, 'checkpointer_blocking_duration_secs': 0.7588424682617188, 'get_old_steps_start_time': 1776710034.1756785, 'get_old_steps_duration_secs': 3.0279159545898438e-05, 'checkpoint_manager_blocking_start_time': 1776709985.4626212, 'checkpoint_manager_blocking_duration_secs': 48.739919662475586} I0420 18:33:54.202692 139737188927296 checkpointing.py:409] Started an asynchronous checkpoint save for step 15 I0420 18:33:54.203822 139737188927296 metric_logger.py:196] completed step: 14, seconds: 0.146, TFLOP/s/device: 92.830, Tokens/s/device: 13992.416, total_weights: 65536, loss: 5.858, lm_loss: 5.858, perplexity: 350.067 I0420 18:33:54.211846 139737188927296 metric_logger.py:196] completed step: 15, seconds: 0.148, TFLOP/s/device: 91.624, Tokens/s/device: 13810.497, total_weights: 65536, loss: 5.713, lm_loss: 5.713, perplexity: 302.780 I0420 18:34:00.229196 139607626733312 array_metadata_store.py:203] [process=7][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/nnx_xpk_feat_nnx_post_train_fixes_20260420_153543_15_ocdbt_true/checkpoints/15/items/array_metadatas/process_7 I0420 18:34:15.854488 139737188927296 metric_logger.py:196] completed step: 16, seconds: 49.036, TFLOP/s/device: 0.277, Tokens/s/device: 41.766, total_weights: 65536, loss: 5.599, lm_loss: 5.599, perplexity: 270.201 I0420 18:34:16.002375 139737188927296 metric_logger.py:196] completed step: 17, seconds: 21.498, TFLOP/s/device: 0.632, Tokens/s/device: 95.266, total_weights: 65536, loss: 5.511, lm_loss: 5.511, perplexity: 247.443 I0420 18:34:16.149705 139737188927296 metric_logger.py:196] completed step: 18, seconds: 0.153, TFLOP/s/device: 88.698, Tokens/s/device: 13369.455, total_weights: 65536, loss: 5.442, lm_loss: 5.442, perplexity: 230.909 I0420 18:34:16.297951 139737188927296 checkpointing.py:794] Waiting for step 19 to finish before checkpoint... I0420 18:34:16.298637 139737188927296 checkpointing.py:798] Waited 0.0006976127624511719 seconds for step 19 to finish before starting checkpointing. I0420 18:34:16.300742 139737188927296 checkpoint_manager.py:2020] [process=7][thread=MainThread][step=15][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0420 18:34:36.191634 139611355465472 base_pytree_checkpoint_handler.py:130] [process=7] /jax/orbax/write/gbytes_per_sec: 37.563 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.05190825462341 s) (per-host) I0420 18:34:36.191751 139611355465472 async_checkpointer.py:90] [process=7][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.016128s. I0420 18:34:45.528178 139611355465472 async_checkpointer.py:160] [process=7][thread=async_save] Background save thread done. Time taken: 51.352521s. I0420 18:34:45.528458 139611393222400 async_checkpointer.py:288] [process=7][thread=save_finalize] Done with waiting for background save thread=async_save. I0420 18:34:45.528583 139611393222400 async_checkpointer.py:298] [process=7][thread=save_finalize] No errors found in background save thread=async_save. I0420 18:34:45.528632 139611393222400 checkpoint_manager.py:2137] [process=7][thread=save_finalize][step=15] CheckpointManager Save Finalize is syncing with other hosts... I0420 18:34:45.531175 139611393222400 checkpoint_manager.py:2146] [process=7][thread=save_finalize][step=15] CheckpointManager Save Finalize is done on all hosts. I0420 18:34:45.531371 139737188927296 checkpoint_manager.py:2032] [process=7][thread=MainThread][step=15][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=15. W0420 18:34:45.531514 139737188927296 checkpoint_manager.py:1452] Waiting for previous save to complete took 29.230772 seconds. If this number is high, consider checkpointing less frequently. I0420 18:34:45.533590 139737188927296 checkpoint_manager.py:1512] [process=7] Saving checkpoint at step 19 I0420 18:34:45.535776 139737188927296 event_tracking.py:70] [process=7] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/nnx_xpk_feat_nnx_post_train_fixes_20260420_153543_15_ocdbt_true/checkpoints/19. I0420 18:34:45.855376 139737188927296 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array. I0420 18:34:45.855467 139737188927296 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 18:34:45.881917 139737188927296 base_pytree_checkpoint_handler.py:154] [process=7][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.028037s I0420 18:34:45.882085 139737188927296 base_pytree_checkpoint_handler.py:130] [process=7] /jax/orbax/write/blocking_gbytes_per_sec: 43.816 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.03520607948303223 s) (per-host) I0420 18:34:45.882157 139737188927296 base_pytree_checkpoint_handler.py:768] [process=7][thread=MainThread] Initiated Pytree async_save. Time taken: 0.035275s (batch_requests_ready=0.002920s, total_serialization_initiated=0.032281s, others=0.000074s) I0420 18:34:45.882258 139737188927296 composite_checkpoint_handler.py:715] [process=7][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.039782s (all_items=0.000012s, per_item={'items': '0.00001216'}, temp_paths=0.039769) I0420 18:34:45.883026 139737188927296 event_tracking.py:125] [process=7] [async] Finished blocking save in 0.35 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/nnx_xpk_feat_nnx_post_train_fixes_20260420_153543_15_ocdbt_true/checkpoints/19. I0420 18:34:45.883351 139611393222400 async_checkpointer.py:76] [process=7][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-20 18:54:45.883315 I0420 18:34:45.887423 139737188927296 checkpoint_manager.py:1560] [process=7][thread=MainThread][step=19] Starting CheckpointManager Save Finalize thread=save_finalize I0420 18:34:45.887707 139607626733312 async_checkpointer.py:280] [process=7][thread=save_finalize] Waiting for background save thread=async_save. I0420 18:34:45.887865 139737188927296 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/nnx_xpk_feat_nnx_post_train_fixes_20260420_153543_15_ocdbt_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776710056.3007126, 'wait_for_prev_duration_secs': 29.230771780014038, 'time_between_consecutive_saves_sec': 22.886011123657227, 'checkpointer_blocking_start_time': 1776710085.5336301, 'checkpointer_blocking_duration_secs': 0.34985971450805664, 'get_old_steps_start_time': 1776710085.8835087, 'get_old_steps_duration_secs': 2.6941299438476562e-05, 'checkpoint_manager_blocking_start_time': 1776710056.298874, 'checkpoint_manager_blocking_duration_secs': 29.58895516395569} I0420 18:34:45.887987 139737188927296 checkpointing.py:409] Started an asynchronous checkpoint save for step 19 I0420 18:34:45.888031 139737188927296 checkpoint_manager.py:2020] [process=7][thread=MainThread][step=19][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0420 18:34:51.872628 139609254131456 array_metadata_store.py:203] [process=7][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/nnx_xpk_feat_nnx_post_train_fixes_20260420_153543_15_ocdbt_true/checkpoints/19/items/array_metadatas/process_7 I0420 18:35:28.223489 139611393222400 base_pytree_checkpoint_handler.py:130] [process=7] /jax/orbax/write/gbytes_per_sec: 37.275 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.37657642364502 s) (per-host) I0420 18:35:28.223606 139611393222400 async_checkpointer.py:90] [process=7][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.340146s. I0420 18:35:36.763445 139611393222400 async_checkpointer.py:160] [process=7][thread=async_save] Background save thread done. Time taken: 50.879970s. I0420 18:35:36.763731 139607626733312 async_checkpointer.py:288] [process=7][thread=save_finalize] Done with waiting for background save thread=async_save. I0420 18:35:36.763845 139607626733312 async_checkpointer.py:298] [process=7][thread=save_finalize] No errors found in background save thread=async_save. I0420 18:35:36.763891 139607626733312 checkpoint_manager.py:2137] [process=7][thread=save_finalize][step=19] CheckpointManager Save Finalize is syncing with other hosts... I0420 18:35:36.765573 139607626733312 checkpoint_manager.py:2146] [process=7][thread=save_finalize][step=19] CheckpointManager Save Finalize is done on all hosts. I0420 18:35:36.765754 139737188927296 checkpoint_manager.py:2032] [process=7][thread=MainThread][step=19][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=19. I0420 18:35:36.765922 139737188927296 checkpoint_manager.py:2009] [process=7][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0420 18:35:36.766844 139737188927296 metric_logger.py:196] completed step: 19, seconds: 0.148, TFLOP/s/device: 91.762, Tokens/s/device: 13831.296, total_weights: 65536, loss: 5.385, lm_loss: 5.385, perplexity: 218.045 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Mon Apr 20 18:35:48 UTC 2026 EXIT_CODE=0