XPK Start: Fri Apr 17 01:56:21 UTC 2026 PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used. 2026-04-17 01:56:45.137381: 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) I0417 01:56:45.315542 139233769736000 max_utils.py:273] Attempting to initialize the jax distributed system... I0417 01:56:54.355340 139233769736000 distributed.py:149] Starting JAX distributed service on [::]:8482 I0417 01:56:54.357742 139233769736000 distributed.py:172] Connecting to JAX distributed service on mt-15-ocdbt-true-sv-znfp1-slice-job-0-0.mt-15-ocdbt-true-sv-znfp1:8482 I0417 01:56:56.804248 139233769736000 max_utils.py:284] Jax distributed system initialized! I0417 01:57:01.893987 139233769736000 max_utils.py:800] System Information: Jax Version: 0.9.2 I0417 01:57:01.894088 139233769736000 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0417 01:57:01.894134 139233769736000 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 I0417 01:57:01.894170 139233769736000 train_utils.py:377] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0417 01:57:02.932710 139233769736000 maxtext_utils.py:1687] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0417 01:57:03.045136 139233769736000 checkpointing.py:688] Setting up checkpoint logger... I0417 01:57:03.045248 139233769736000 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0417 01:57:03.045293 139233769736000 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0417 01:57:03.045493 139233769736000 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 0x7ea147f18b90>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0417 01:57:06.479199 139233769736000 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0417 01:57:06.479428 139233769736000 checkpoint_manager.py:708] [process=1][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ea01f6620c0>}, handler_registry=None I0417 01:57:06.479681 139233769736000 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ea01f6620c0>` 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`. I0417 01:57:06.479729 139233769736000 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ea01f779610>` 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`. I0417 01:57:06.479763 139233769736000 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 0x7ea01f6620c0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ea01f6620c0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ea01f779610>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ea01f779610>}). I0417 01:57:06.480132 139233769736000 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0417 01:57:06.480205 139233769736000 async_checkpointer.py:192] [process=1][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7e8d9c652340> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0417 01:57:07.656324 139233769736000 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260417_003418/nnx_xpk_feat_nnx_post_train_fixes_20260417_003418_15_ocdbt_true/checkpoints I0417 01:57:08.077874 139233769736000 checkpoint_manager.py:929] [process=1][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_20260417_003418/nnx_xpk_feat_nnx_post_train_fixes_20260417_003418_15_ocdbt_true/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7ea01f515580> I0417 01:57:08.078052 139233769736000 checkpointing.py:302] Checkpoint manager created! I0417 01:57:09.044049 139233769736000 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0417 01:57:09.044173 139233769736000 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0417 01:57:10.430288 139233769736000 maxtext_utils.py:1805] decoder/decoder_norm/scale/value Shape: float32[2048] Physical: (None,) I0417 01:57:10.430405 139233769736000 maxtext_utils.py:1805] decoder/layers/mlp/wi_0/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0417 01:57:10.430473 139233769736000 maxtext_utils.py:1805] decoder/layers/mlp/wi_1/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0417 01:57:10.430521 139233769736000 maxtext_utils.py:1805] decoder/layers/mlp/wo/kernel/value Shape: float32[7168,16,2048] Physical: (None, None, 'fsdp') I0417 01:57:10.430559 139233769736000 maxtext_utils.py:1805] decoder/layers/post_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0417 01:57:10.430593 139233769736000 maxtext_utils.py:1805] decoder/layers/pre_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0417 01:57:10.430629 139233769736000 maxtext_utils.py:1805] decoder/layers/self_attention/key/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0417 01:57:10.430663 139233769736000 maxtext_utils.py:1805] decoder/layers/self_attention/out/kernel/value Shape: float32[16,16,128,2048] Physical: (None, None, None, 'fsdp') I0417 01:57:10.430697 139233769736000 maxtext_utils.py:1805] decoder/layers/self_attention/query/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0417 01:57:10.430729 139233769736000 maxtext_utils.py:1805] decoder/layers/self_attention/value/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0417 01:57:10.430760 139233769736000 maxtext_utils.py:1805] decoder/logits_dense/kernel/value Shape: float32[2048,32000] Physical: ('fsdp', None) I0417 01:57:10.430791 139233769736000 maxtext_utils.py:1805] token_embedder/embedding/value Shape: float32[32000,2048] Physical: (None, 'fsdp') I0417 01:57:10.826892 139233769736000 nnx_decoders.py:465] nnx_decoders/carry Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0417 01:57:10.826987 139233769736000 nnx_decoders.py:465] nnx_decoders/carry Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0417 01:57:10.833086 139233769736000 nnx_decoders.py:465] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0417 01:57:10.833142 139233769736000 nnx_decoders.py:465] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0417 01:57:10.849300 139233769736000 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0417 01:57:10.849354 139233769736000 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0417 01:57:10.864838 139233769736000 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0417 01:57:10.864895 139233769736000 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0417 01:57:10.888870 139233769736000 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0417 01:57:10.888937 139233769736000 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0417 01:57:10.904494 139233769736000 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0417 01:57:10.904552 139233769736000 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0417 01:57:10.920084 139233769736000 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0417 01:57:10.920142 139233769736000 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0417 01:57:10.949706 139233769736000 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0417 01:57:10.949774 139233769736000 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0417 01:57:10.969291 139233769736000 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0417 01:57:10.969354 139233769736000 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0417 01:57:22.006478 139233769736000 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. I0417 01:57:22.008827 139233769736000 metric_logger.py:289] number parameters: 1.104 billion I0417 01:57:33.397744 139233769736000 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0417 01:57:33.549638 139233769736000 checkpointing.py:798] Waited 0.15187978744506836 seconds for step 0 to finish before starting checkpointing. I0417 01:57:33.552153 139233769736000 checkpoint_manager.py:2009] [process=1][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0417 01:57:33.553815 139233769736000 checkpoint_manager.py:1512] [process=1] Saving checkpoint at step 0 I0417 01:57:33.555189 139233769736000 event_tracking.py:70] [process=1] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260417_003418/nnx_xpk_feat_nnx_post_train_fixes_20260417_003418_15_ocdbt_true/checkpoints/0. I0417 01:57:34.302014 139233769736000 signaling_client.py:364] Using JaxDistributedSignalingClient I0417 01:57:34.303026 139233769736000 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array. I0417 01:57:34.303084 139233769736000 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 I0417 01:57:34.583760 139233769736000 base_pytree_checkpoint_handler.py:154] [process=1][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.282511s I0417 01:57:34.583932 139233769736000 base_pytree_checkpoint_handler.py:130] [process=1] /jax/orbax/write/blocking_gbytes_per_sec: 5.286 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.29179930686950684 s) (per-host) I0417 01:57:34.583983 139233769736000 base_pytree_checkpoint_handler.py:768] [process=1][thread=MainThread] Initiated Pytree async_save. Time taken: 0.291861s (batch_requests_ready=0.003227s, total_serialization_initiated=0.288565s, others=0.000069s) I0417 01:57:34.584079 139233769736000 composite_checkpoint_handler.py:715] [process=1][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.296056s (all_items=0.000017s, per_item={'items': '0.00001717'}, temp_paths=0.296039) I0417 01:57:34.584916 139233769736000 event_tracking.py:125] [process=1] [async] Finished blocking save in 1.03 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260417_003418/nnx_xpk_feat_nnx_post_train_fixes_20260417_003418_15_ocdbt_true/checkpoints/0. I0417 01:57:34.585206 139108644796160 async_checkpointer.py:76] [process=1][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-17 02:17:34.585174 I0417 01:57:34.588080 139233769736000 checkpoint_manager.py:1560] [process=1][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0417 01:57:34.588399 139105467889408 async_checkpointer.py:280] [process=1][thread=save_finalize] Waiting for background save thread=async_save. I0417 01:57:34.588554 139233769736000 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260417_003418/nnx_xpk_feat_nnx_post_train_fixes_20260417_003418_15_ocdbt_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776391053.5521338, 'wait_for_prev_duration_secs': 6.151199340820312e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776391053.5538533, 'checkpointer_blocking_duration_secs': 1.031506061553955, 'get_old_steps_start_time': 1776391054.5853865, 'get_old_steps_duration_secs': 3.0279159545898438e-05, 'checkpoint_manager_blocking_start_time': 1776391053.550049, 'checkpoint_manager_blocking_duration_secs': 1.0384626388549805} I0417 01:57:34.588713 139233769736000 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0417 01:57:34.588791 139233769736000 max_utils.py:750] Memstats: After params initialized: I0417 01:57:34.588852 139233769736000 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_2(process=1,(2,0,0,0)) I0417 01:57:34.588886 139233769736000 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_3(process=1,(3,0,0,0)) I0417 01:57:34.588911 139233769736000 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_6(process=1,(2,1,0,0)) I0417 01:57:34.588933 139233769736000 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_7(process=1,(3,1,0,0)) I0417 01:57:34.905810 139233769736000 metric_logger.py:185] completed step: 0, seconds: 11.388, TFLOP/s/device: 1.193, Tokens/s/device: 179.841, total_weights: 65536, loss: 10.874 I0417 01:57:35.078872 139233769736000 metric_logger.py:185] completed step: 1, seconds: 1.506, TFLOP/s/device: 9.020, Tokens/s/device: 1359.530, total_weights: 65536, loss: 10.874 I0417 01:57:35.488919 139233769736000 metric_logger.py:185] completed step: 2, seconds: 0.027, TFLOP/s/device: 504.498, Tokens/s/device: 76043.368, total_weights: 65536, loss: 10.560 I0417 01:57:35.636301 139233769736000 metric_logger.py:185] completed step: 3, seconds: 0.400, TFLOP/s/device: 33.977, Tokens/s/device: 5121.447, total_weights: 65536, loss: 9.979 I0417 01:57:35.642199 139233769736000 checkpointing.py:794] Waiting for step 5 to finish before checkpoint... I0417 01:57:35.931668 139233769736000 checkpointing.py:798] Waited 0.2894415855407715 seconds for step 5 to finish before starting checkpointing. I0417 01:57:35.934396 139233769736000 checkpoint_manager.py:2020] [process=1][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0417 01:57:37.912491 2719 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0417 01:57:40.469985 139106487822080 array_metadata_store.py:203] [process=1][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260417_003418/nnx_xpk_feat_nnx_post_train_fixes_20260417_003418_15_ocdbt_true/checkpoints/0/items/array_metadatas/process_1 I0417 01:58:11.206186 139108644796160 base_pytree_checkpoint_handler.py:130] [process=1] /jax/orbax/write/gbytes_per_sec: 42.791 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 36.9140145778656 s) (per-host) I0417 01:58:11.206314 139108644796160 async_checkpointer.py:90] [process=1][thread=async_save] 3 Handler Commit operations completed. Time taken: 36.620994s. I0417 01:58:19.945816 139108644796160 async_checkpointer.py:160] [process=1][thread=async_save] Background save thread done. Time taken: 45.360480s. I0417 01:58:19.946122 139105467889408 async_checkpointer.py:288] [process=1][thread=save_finalize] Done with waiting for background save thread=async_save. I0417 01:58:19.946263 139105467889408 async_checkpointer.py:298] [process=1][thread=save_finalize] No errors found in background save thread=async_save. I0417 01:58:19.946333 139105467889408 checkpoint_manager.py:2137] [process=1][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0417 01:58:19.948074 139105467889408 checkpoint_manager.py:2146] [process=1][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0417 01:58:19.948246 139233769736000 checkpoint_manager.py:2032] [process=1][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0. W0417 01:58:19.948380 139233769736000 checkpoint_manager.py:1452] Waiting for previous save to complete took 44.013983 seconds. If this number is high, consider checkpointing less frequently. I0417 01:58:19.950845 139233769736000 checkpoint_manager.py:1512] [process=1] Saving checkpoint at step 5 I0417 01:58:19.953128 139233769736000 event_tracking.py:70] [process=1] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260417_003418/nnx_xpk_feat_nnx_post_train_fixes_20260417_003418_15_ocdbt_true/checkpoints/5. I0417 01:58:20.706480 139233769736000 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array. I0417 01:58:20.706572 139233769736000 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 I0417 01:58:20.740448 139233769736000 base_pytree_checkpoint_handler.py:154] [process=1][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.035520s I0417 01:58:20.740635 139233769736000 base_pytree_checkpoint_handler.py:130] [process=1] /jax/orbax/write/blocking_gbytes_per_sec: 35.885 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.042986392974853516 s) (per-host) I0417 01:58:20.740688 139233769736000 base_pytree_checkpoint_handler.py:768] [process=1][thread=MainThread] Initiated Pytree async_save. Time taken: 0.043047s (batch_requests_ready=0.003162s, total_serialization_initiated=0.039816s, others=0.000069s) I0417 01:58:20.740788 139233769736000 composite_checkpoint_handler.py:715] [process=1][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.048284s (all_items=0.000016s, per_item={'items': '0.00001574'}, temp_paths=0.048269) I0417 01:58:20.741543 139233769736000 event_tracking.py:125] [process=1] [async] Finished blocking save in 0.79 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260417_003418/nnx_xpk_feat_nnx_post_train_fixes_20260417_003418_15_ocdbt_true/checkpoints/5. I0417 01:58:20.741848 139105467889408 async_checkpointer.py:76] [process=1][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-17 02:18:20.741814 I0417 01:58:20.759839 139233769736000 checkpoint_manager.py:1560] [process=1][thread=MainThread][step=5] Starting CheckpointManager Save Finalize thread=save_finalize I0417 01:58:20.760126 139106487822080 async_checkpointer.py:280] [process=1][thread=save_finalize] Waiting for background save thread=async_save. I0417 01:58:20.760283 139233769736000 standard_logger.py:34] {'step': 5, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260417_003418/nnx_xpk_feat_nnx_post_train_fixes_20260417_003418_15_ocdbt_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776391055.934367, 'wait_for_prev_duration_secs': 44.01398277282715, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776391099.950883, 'checkpointer_blocking_duration_secs': 0.7911045551300049, 'get_old_steps_start_time': 1776391100.7420106, 'get_old_steps_duration_secs': 3.2901763916015625e-05, 'checkpoint_manager_blocking_start_time': 1776391055.932024, 'checkpoint_manager_blocking_duration_secs': 44.828224420547485} I0417 01:58:20.760395 139233769736000 checkpointing.py:409] Started an asynchronous checkpoint save for step 5 I0417 01:58:20.761205 139233769736000 metric_logger.py:185] completed step: 4, seconds: 0.164, TFLOP/s/device: 82.770, Tokens/s/device: 12476.014, total_weights: 65536, loss: 9.457 I0417 01:58:20.768587 139233769736000 metric_logger.py:185] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.404, Tokens/s/device: 13928.183, total_weights: 65536, loss: 8.955 I0417 01:58:27.827126 139080742463232 array_metadata_store.py:203] [process=1][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260417_003418/nnx_xpk_feat_nnx_post_train_fixes_20260417_003418_15_ocdbt_true/checkpoints/5/items/array_metadatas/process_1 I0417 01:58:44.109508 139233769736000 metric_logger.py:185] completed step: 6, seconds: 45.125, TFLOP/s/device: 0.301, Tokens/s/device: 45.385, total_weights: 65536, loss: 8.465 I0417 01:58:44.256961 139233769736000 metric_logger.py:185] completed step: 7, seconds: 23.196, TFLOP/s/device: 0.586, Tokens/s/device: 88.293, total_weights: 65536, loss: 7.998 I0417 01:58:44.404630 139233769736000 metric_logger.py:185] completed step: 8, seconds: 0.153, TFLOP/s/device: 88.676, Tokens/s/device: 13366.140, total_weights: 65536, loss: 7.567 I0417 01:58:44.553006 139233769736000 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0417 01:58:44.553714 139233769736000 checkpointing.py:798] Waited 0.0007193088531494141 seconds for step 9 to finish before starting checkpointing. I0417 01:58:44.555746 139233769736000 checkpoint_manager.py:2020] [process=1][thread=MainThread][step=5][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0417 01:59:02.890551 139105467889408 base_pytree_checkpoint_handler.py:130] [process=1] /jax/orbax/write/gbytes_per_sec: 37.438 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.19286751747131 s) (per-host) I0417 01:59:02.890661 139105467889408 async_checkpointer.py:90] [process=1][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.148701s. I0417 01:59:11.417354 139105467889408 async_checkpointer.py:160] [process=1][thread=async_save] Background save thread done. Time taken: 50.675378s. I0417 01:59:11.417677 139106487822080 async_checkpointer.py:288] [process=1][thread=save_finalize] Done with waiting for background save thread=async_save. I0417 01:59:11.417797 139106487822080 async_checkpointer.py:298] [process=1][thread=save_finalize] No errors found in background save thread=async_save. I0417 01:59:11.417845 139106487822080 checkpoint_manager.py:2137] [process=1][thread=save_finalize][step=5] CheckpointManager Save Finalize is syncing with other hosts... I0417 01:59:11.419681 139106487822080 checkpoint_manager.py:2146] [process=1][thread=save_finalize][step=5] CheckpointManager Save Finalize is done on all hosts. I0417 01:59:11.419842 139233769736000 checkpoint_manager.py:2032] [process=1][thread=MainThread][step=5][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=5. W0417 01:59:11.419975 139233769736000 checkpoint_manager.py:1452] Waiting for previous save to complete took 26.864235 seconds. If this number is high, consider checkpointing less frequently. I0417 01:59:11.421561 139233769736000 checkpoint_manager.py:1512] [process=1] Saving checkpoint at step 9 I0417 01:59:11.423436 139233769736000 event_tracking.py:70] [process=1] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260417_003418/nnx_xpk_feat_nnx_post_train_fixes_20260417_003418_15_ocdbt_true/checkpoints/9. I0417 01:59:12.141015 139233769736000 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array. I0417 01:59:12.141107 139233769736000 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 I0417 01:59:12.177491 139233769736000 base_pytree_checkpoint_handler.py:154] [process=1][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.038045s I0417 01:59:12.177654 139233769736000 base_pytree_checkpoint_handler.py:130] [process=1] /jax/orbax/write/blocking_gbytes_per_sec: 34.053 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04529857635498047 s) (per-host) I0417 01:59:12.177704 139233769736000 base_pytree_checkpoint_handler.py:768] [process=1][thread=MainThread] Initiated Pytree async_save. Time taken: 0.045357s (batch_requests_ready=0.002837s, total_serialization_initiated=0.042457s, others=0.000063s) I0417 01:59:12.177799 139233769736000 composite_checkpoint_handler.py:715] [process=1][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.049602s (all_items=0.000009s, per_item={'items': '0.00000930'}, temp_paths=0.049593) I0417 01:59:12.178530 139233769736000 event_tracking.py:125] [process=1] [async] Finished blocking save in 0.76 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260417_003418/nnx_xpk_feat_nnx_post_train_fixes_20260417_003418_15_ocdbt_true/checkpoints/9. I0417 01:59:12.178809 139106487822080 async_checkpointer.py:76] [process=1][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-17 02:19:12.178786 I0417 01:59:12.180657 139233769736000 checkpoint_manager.py:1560] [process=1][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0417 01:59:12.180862 139107044931328 async_checkpointer.py:280] [process=1][thread=save_finalize] Waiting for background save thread=async_save. I0417 01:59:12.180955 139233769736000 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260417_003418/nnx_xpk_feat_nnx_post_train_fixes_20260417_003418_15_ocdbt_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776391124.555716, 'wait_for_prev_duration_secs': 26.864234924316406, 'time_between_consecutive_saves_sec': 24.607603073120117, 'checkpointer_blocking_start_time': 1776391151.4215991, 'checkpointer_blocking_duration_secs': 0.7573087215423584, 'get_old_steps_start_time': 1776391152.1789258, 'get_old_steps_duration_secs': 2.47955322265625e-05, 'checkpoint_manager_blocking_start_time': 1776391124.5539384, 'checkpoint_manager_blocking_duration_secs': 27.626988649368286} I0417 01:59:12.181106 139233769736000 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0417 01:59:12.181149 139233769736000 checkpoint_manager.py:2020] [process=1][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0417 01:59:17.509418 139080742463232 array_metadata_store.py:203] [process=1][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260417_003418/nnx_xpk_feat_nnx_post_train_fixes_20260417_003418_15_ocdbt_true/checkpoints/9/items/array_metadatas/process_1 I0417 01:59:53.635869 139106487822080 base_pytree_checkpoint_handler.py:130] [process=1] /jax/orbax/write/gbytes_per_sec: 38.059 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.50347352027893 s) (per-host) I0417 01:59:53.635989 139106487822080 async_checkpointer.py:90] [process=1][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.457105s. I0417 02:00:01.344155 139106487822080 async_checkpointer.py:160] [process=1][thread=async_save] Background save thread done. Time taken: 49.165255s. I0417 02:00:01.344389 139107044931328 async_checkpointer.py:288] [process=1][thread=save_finalize] Done with waiting for background save thread=async_save. I0417 02:00:01.344446 139107044931328 async_checkpointer.py:298] [process=1][thread=save_finalize] No errors found in background save thread=async_save. I0417 02:00:01.344501 139107044931328 checkpoint_manager.py:2137] [process=1][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0417 02:00:01.346384 139107044931328 checkpoint_manager.py:2146] [process=1][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0417 02:00:01.346544 139233769736000 checkpoint_manager.py:2032] [process=1][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9. I0417 02:00:01.346717 139233769736000 checkpoint_manager.py:2009] [process=1][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0417 02:00:01.347369 139233769736000 metric_logger.py:185] completed step: 9, seconds: 0.148, TFLOP/s/device: 91.896, Tokens/s/device: 13851.596, total_weights: 65536, loss: 7.176 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Fri Apr 17 02:00:11 UTC 2026 EXIT_CODE=0