XPK Start: Sat Apr 18 22:22:01 UTC 2026 PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used. 2026-04-18 22:22:25.525673: 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) I0418 22:22:25.705043 136397208229696 max_utils.py:273] Attempting to initialize the jax distributed system... I0418 22:22:34.745873 136397208229696 distributed.py:149] Starting JAX distributed service on [::]:8482 I0418 22:22:34.748078 136397208229696 distributed.py:172] Connecting to JAX distributed service on mt-03-dropout-ct1ig-slice-job-0-0.mt-03-dropout-ct1ig:8482 I0418 22:22:36.786908 136397208229696 max_utils.py:284] Jax distributed system initialized! I0418 22:22:42.994033 136397208229696 max_utils.py:800] System Information: Jax Version: 0.9.2 I0418 22:22:42.994135 136397208229696 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0418 22:22:42.994174 136397208229696 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 I0418 22:22:42.994208 136397208229696 train_utils.py:378] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0418 22:22:43.679608 136397208229696 maxtext_utils.py:1718] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0418 22:22:43.790537 136397208229696 checkpointing.py:688] Setting up checkpoint logger... I0418 22:22:43.790647 136397208229696 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0418 22:22:43.790692 136397208229696 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0418 22:22:43.790912 136397208229696 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 0x7c0cbb7503b0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0418 22:22:46.728571 136397208229696 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0418 22:22:46.728749 136397208229696 checkpoint_manager.py:708] [process=0][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7bf8c06df470>}, handler_registry=None I0418 22:22:46.728990 136397208229696 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7bf8c06df470>` 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`. I0418 22:22:46.729039 136397208229696 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7bf8886cd760>` 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`. I0418 22:22:46.729074 136397208229696 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 0x7bf8c06df470>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7bf8c06df470>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7bf8886cd760>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7bf8886cd760>}). I0418 22:22:46.729395 136397208229696 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0418 22:22:46.729464 136397208229696 async_checkpointer.py:192] [process=0][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7bf8c029d120> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0418 22:22:48.217717 136397208229696 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/nnx_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_03_dropout/checkpoints I0418 22:22:48.663497 136397208229696 checkpoint_manager.py:929] [process=0][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_linen_converter_and_sharding_tools_20260418_204152/nnx_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_03_dropout/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7c0cbb4b2b10> I0418 22:22:48.663677 136397208229696 checkpointing.py:302] Checkpoint manager created! I0418 22:22:49.021882 136397208229696 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0418 22:22:49.021993 136397208229696 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0418 22:22:50.439826 136397208229696 maxtext_utils.py:1836] decoder/decoder_norm/scale/value Shape: float32[2048] Physical: (None,) I0418 22:22:50.439942 136397208229696 maxtext_utils.py:1836] decoder/layers/mlp/wi_0/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0418 22:22:50.439995 136397208229696 maxtext_utils.py:1836] decoder/layers/mlp/wi_1/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0418 22:22:50.440038 136397208229696 maxtext_utils.py:1836] decoder/layers/mlp/wo/kernel/value Shape: float32[7168,16,2048] Physical: (None, None, 'fsdp') I0418 22:22:50.440076 136397208229696 maxtext_utils.py:1836] decoder/layers/post_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0418 22:22:50.440111 136397208229696 maxtext_utils.py:1836] decoder/layers/pre_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0418 22:22:50.440148 136397208229696 maxtext_utils.py:1836] decoder/layers/self_attention/key/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0418 22:22:50.440187 136397208229696 maxtext_utils.py:1836] decoder/layers/self_attention/out/kernel/value Shape: float32[16,16,128,2048] Physical: (None, None, None, 'fsdp') I0418 22:22:50.440222 136397208229696 maxtext_utils.py:1836] decoder/layers/self_attention/query/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0418 22:22:50.440257 136397208229696 maxtext_utils.py:1836] decoder/layers/self_attention/value/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0418 22:22:50.440289 136397208229696 maxtext_utils.py:1836] decoder/logits_dense/kernel/value Shape: float32[2048,32000] Physical: ('fsdp', None) I0418 22:22:50.440322 136397208229696 maxtext_utils.py:1836] token_embedder/embedding/value Shape: float32[32000,2048] Physical: (None, 'fsdp') I0418 22:22:50.853967 136397208229696 nnx_decoders.py:465] nnx_decoders/carry Logical: bfloat16[32,128,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0418 22:22:50.854058 136397208229696 nnx_decoders.py:465] nnx_decoders/carry Physical: bfloat16[32,128,2048]....................................... ('fsdp', None, None). I0418 22:22:50.860134 136397208229696 nnx_decoders.py:465] Unknown Logical: bfloat16[32,128,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0418 22:22:50.860191 136397208229696 nnx_decoders.py:465] Unknown Physical: bfloat16[32,128,2048]....................................... ('fsdp', None, None). I0418 22:22:50.876441 136397208229696 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,128,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0418 22:22:50.876497 136397208229696 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,128,2048]....................................... ('fsdp', None, None). I0418 22:22:50.892018 136397208229696 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,128,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0418 22:22:50.892075 136397208229696 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,128,2048]....................................... ('fsdp', None, None). I0418 22:22:50.915755 136397208229696 attentions.py:1154] attentions/query Logical: bfloat16[32,128,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0418 22:22:50.915837 136397208229696 attentions.py:1154] attentions/query Physical: bfloat16[32,128,16,128]..................................... ('fsdp', None, None, None). I0418 22:22:50.931582 136397208229696 attentions.py:1155] attentions/key Logical: bfloat16[32,128,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0418 22:22:50.931644 136397208229696 attentions.py:1155] attentions/key Physical: bfloat16[32,128,16,128]..................................... ('fsdp', None, None, None). I0418 22:22:50.947268 136397208229696 attentions.py:1156] attentions/value Logical: bfloat16[32,128,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0418 22:22:50.947328 136397208229696 attentions.py:1156] attentions/value Physical: bfloat16[32,128,16,128]..................................... ('fsdp', None, None, None). I0418 22:22:50.976597 136397208229696 attentions.py:1197] attentions/out Logical: bfloat16[32,128,16,128]..................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0418 22:22:50.976666 136397208229696 attentions.py:1197] attentions/out Physical: bfloat16[32,128,16,128]..................................... ('fsdp', None, None, None). I0418 22:22:51.002254 136397208229696 linears.py:525] linears/x Logical: bfloat16[32,128,7168]....................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0418 22:22:51.002318 136397208229696 linears.py:525] linears/x Physical: bfloat16[32,128,7168]....................................... ('fsdp', None, None). I0418 22:22:54.698029 136397208229696 max_utils.py:791] Total memory size: 0.8 GB, Output size: 0.4 GB, Temp size: 0.4 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB. I0418 22:22:54.707283 136397208229696 metric_logger.py:301] number parameters: 1.104 billion I0418 22:22:59.000676 136397208229696 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0418 22:22:59.074500 136397208229696 checkpointing.py:798] Waited 0.07381153106689453 seconds for step 0 to finish before starting checkpointing. I0418 22:22:59.076944 136397208229696 checkpoint_manager.py:2009] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0418 22:22:59.079045 136397208229696 checkpoint_manager.py:1512] [process=0] Saving checkpoint at step 0 I0418 22:22:59.080437 136397208229696 event_tracking.py:70] [process=0] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/nnx_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_03_dropout/checkpoints/0. I0418 22:22:59.777204 136397208229696 signaling_client.py:364] Using JaxDistributedSignalingClient I0418 22:22:59.796497 136397208229696 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array. I0418 22:22:59.796569 136397208229696 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 I0418 22:23:00.074736 136397208229696 base_pytree_checkpoint_handler.py:154] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.279684s I0418 22:23:00.075576 136397208229696 base_pytree_checkpoint_handler.py:130] [process=0] /jax/orbax/write/blocking_gbytes_per_sec: 5.309 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.29055118560791016 s) (per-host) I0418 22:23:00.075652 136397208229696 base_pytree_checkpoint_handler.py:768] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 0.290647s (batch_requests_ready=0.003034s, total_serialization_initiated=0.286863s, others=0.000750s) I0418 22:23:00.075737 136397208229696 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.294587s (all_items=0.000018s, per_item={'items': '0.00001788'}, temp_paths=0.294569) I0418 22:23:00.076590 136397208229696 event_tracking.py:125] [process=0] [async] Finished blocking save in 1.00 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/nnx_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_03_dropout/checkpoints/0. I0418 22:23:00.076887 136269208213248 async_checkpointer.py:76] [process=0][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-18 22:43:00.076850 I0418 22:23:00.087747 136397208229696 checkpoint_manager.py:1560] [process=0][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0418 22:23:00.088120 136269774448384 async_checkpointer.py:280] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0418 22:23:00.088276 136397208229696 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/nnx_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_03_dropout/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776550979.0769265, 'wait_for_prev_duration_secs': 5.984306335449219e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776550979.079083, 'checkpointer_blocking_duration_secs': 0.9979503154754639, 'get_old_steps_start_time': 1776550980.077059, 'get_old_steps_duration_secs': 2.7894973754882812e-05, 'checkpoint_manager_blocking_start_time': 1776550979.0748718, 'checkpoint_manager_blocking_duration_secs': 1.0133662223815918} I0418 22:23:00.088402 136397208229696 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0418 22:23:00.088469 136397208229696 max_utils.py:750] Memstats: After params initialized: I0418 22:23:00.088520 136397208229696 max_utils.py:756] Using (GB) 0.41 / 31.25 (1.312000%) on TPU_0(process=0,(0,0,0,0)) I0418 22:23:00.088553 136397208229696 max_utils.py:756] Using (GB) 0.41 / 31.25 (1.312000%) on TPU_1(process=0,(1,0,0,0)) I0418 22:23:00.088580 136397208229696 max_utils.py:756] Using (GB) 0.41 / 31.25 (1.312000%) on TPU_4(process=0,(0,1,0,0)) I0418 22:23:00.088604 136397208229696 max_utils.py:756] Using (GB) 0.41 / 31.25 (1.312000%) on TPU_5(process=0,(1,1,0,0)) I0418 22:23:00.432866 136397208229696 metric_logger.py:196] completed step: 0, seconds: 4.089, TFLOP/s/device: 0.196, Tokens/s/device: 31.306, total_weights: 4096, loss: 10.874, lm_loss: 10.874, perplexity: 52805.141 I0418 22:23:00.436079 136397208229696 metric_logger.py:281] To see full metrics 'tensorboard --logdir=gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/nnx_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_03_dropout/tensorboard/' I0418 22:23:00.458380 136269766055680 atomicity.py:140] Creating tmp directory gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/nnx_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_03_dropout/checkpoints/0 I0418 22:23:00.842643 136397208229696 metric_logger.py:196] completed step: 1, seconds: 1.428, TFLOP/s/device: 0.561, Tokens/s/device: 89.606, total_weights: 4096, loss: 10.892, lm_loss: 10.892, perplexity: 53764.488 I0418 22:23:00.907489 136397208229696 metric_logger.py:196] completed step: 2, seconds: 0.411, TFLOP/s/device: 1.950, Tokens/s/device: 311.627, total_weights: 4096, loss: 9.969, lm_loss: 9.969, perplexity: 21350.100 I0418 22:23:00.978149 136397208229696 metric_logger.py:196] completed step: 3, seconds: 0.013, TFLOP/s/device: 64.045, Tokens/s/device: 10235.906, total_weights: 4096, loss: 9.125, lm_loss: 9.125, perplexity: 9186.262 I0418 22:23:02.626041 136269749270272 atomicity.py:140] Creating tmp directory gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/nnx_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_03_dropout/checkpoints/0/items I0418 22:23:02.773848 136268133697280 checkpoint.py:188] Wrote Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776550982377251915, 'commit_timestamp_nsecs': None, 'custom_metadata': {}}, json={"item_handlers": null, "metrics": {}, "performance_metrics": {}, "init_timestamp_nsecs": 1776550982377251915, "commit_timestamp_nsecs": null, "custom_metadata": {}} to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/nnx_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_03_dropout/checkpoints/0/_CHECKPOINT_METADATA I0418 22:23:04.049279 2761 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0418 22:23:05.819477 136269731362560 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/nnx_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_03_dropout/checkpoints/0/items/array_metadatas/process_0 I0418 22:23:10.791557 136397208229696 metric_logger.py:196] completed step: 4, seconds: 0.066, TFLOP/s/device: 12.099, Tokens/s/device: 1933.710, total_weights: 4096, loss: 8.469, lm_loss: 8.469, perplexity: 4765.735 I0418 22:23:10.803246 136397208229696 metric_logger.py:196] completed step: 5, seconds: 0.070, TFLOP/s/device: 11.443, Tokens/s/device: 1828.833, total_weights: 4096, loss: 7.908, lm_loss: 7.908, perplexity: 2719.938 I0418 22:23:10.869850 136397208229696 metric_logger.py:196] completed step: 6, seconds: 9.813, TFLOP/s/device: 0.082, Tokens/s/device: 13.043, total_weights: 4096, loss: 7.554, lm_loss: 7.554, perplexity: 1909.063 I0418 22:23:11.300293 136397208229696 metric_logger.py:196] completed step: 7, seconds: 0.008, TFLOP/s/device: 101.725, Tokens/s/device: 16258.097, total_weights: 4096, loss: 7.313, lm_loss: 7.313, perplexity: 1500.206 I0418 22:23:11.309414 136397208229696 metric_logger.py:196] completed step: 8, seconds: 0.489, TFLOP/s/device: 1.638, Tokens/s/device: 261.828, total_weights: 4096, loss: 7.091, lm_loss: 7.091, perplexity: 1200.912 I0418 22:23:11.378027 136397208229696 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0418 22:23:11.378690 136397208229696 checkpointing.py:798] Waited 0.0006732940673828125 seconds for step 9 to finish before starting checkpointing. I0418 22:23:11.380943 136397208229696 checkpoint_manager.py:2020] [process=0][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0418 22:23:36.922942 136269216605952 base_pytree_checkpoint_handler.py:1282] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 32.871133s (commit=31.216656s, array_metadata_write=1.654476s) I0418 22:23:36.924133 136269208213248 base_pytree_checkpoint_handler.py:130] [process=0] /jax/orbax/write/gbytes_per_sec: 42.532 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 37.139080286026 s) (per-host) I0418 22:23:36.924268 136269208213248 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 36.847266s. I0418 22:23:37.637939 136269208213248 checkpoint.py:228] Read Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776550982377251915, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} from gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/nnx_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_03_dropout/checkpoints/0/_CHECKPOINT_METADATA I0418 22:23:38.372689 136269208213248 array_metadata_store.py:411] [process=0][thread=async_save] Validated ArrayMetadata from all 8 hosts. Time taken: 0.000415s. I0418 22:23:38.398320 136268133697280 checkpoint.py:247] Updated Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776550982377251915, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/nnx_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_03_dropout/checkpoints/0/_CHECKPOINT_METADATA I0418 22:23:39.061165 136269208213248 ocdbt_utils.py:49] Param validation support for Zarr3 will be added later (b/362328389). I0418 22:23:39.958209 136269208213248 base_pytree_checkpoint_handler.py:1406] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 2.198036s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/nnx_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_03_dropout/checkpoints/0/items I0418 22:23:39.959801 136269208213248 atomicity.py:666] Finalizing gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/nnx_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_03_dropout/checkpoints/0/items I0418 22:23:40.500101 136269208213248 atomicity.py:666] Finalizing gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/nnx_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_03_dropout/checkpoints/0 I0418 22:23:42.357949 136269208213248 atomicity.py:847] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/nnx_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_03_dropout/checkpoints/0`. I0418 22:23:42.358743 136269208213248 event_tracking.py:138] [process=0] [async] Finished save (blocking + background) in 43.28 seconds @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/nnx_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_03_dropout/checkpoints/0 I0418 22:23:42.360134 136269208213248 async_checkpointer.py:160] [process=0][thread=async_save] Background save thread done. Time taken: 42.283129s. I0418 22:23:42.360289 136269774448384 async_checkpointer.py:288] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0418 22:23:42.360367 136269774448384 async_checkpointer.py:298] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0418 22:23:42.360437 136269774448384 checkpoint_manager.py:2137] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0418 22:23:42.362540 136269774448384 checkpoint_manager.py:2146] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0418 22:23:42.362702 136397208229696 checkpoint_manager.py:2032] [process=0][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0. W0418 22:23:42.362849 136397208229696 checkpoint_manager.py:1452] Waiting for previous save to complete took 30.981905 seconds. If this number is high, consider checkpointing less frequently. I0418 22:23:42.364753 136397208229696 checkpoint_manager.py:1512] [process=0] Saving checkpoint at step 9 I0418 22:23:42.366783 136397208229696 event_tracking.py:70] [process=0] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/nnx_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_03_dropout/checkpoints/9. I0418 22:23:43.093118 136397208229696 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array. I0418 22:23:43.093218 136397208229696 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 I0418 22:23:43.126059 136397208229696 base_pytree_checkpoint_handler.py:154] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.034308s I0418 22:23:43.126826 136397208229696 base_pytree_checkpoint_handler.py:130] [process=0] /jax/orbax/write/blocking_gbytes_per_sec: 35.829 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.043053627014160156 s) (per-host) I0418 22:23:43.126898 136397208229696 base_pytree_checkpoint_handler.py:768] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 0.043157s (batch_requests_ready=0.002663s, total_serialization_initiated=0.039805s, others=0.000689s) I0418 22:23:43.126986 136397208229696 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.047204s (all_items=0.000016s, per_item={'items': '0.00001621'}, temp_paths=0.047188) I0418 22:23:43.127732 136397208229696 event_tracking.py:125] [process=0] [async] Finished blocking save in 0.76 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/nnx_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_03_dropout/checkpoints/9. I0418 22:23:43.128057 136268680554240 async_checkpointer.py:76] [process=0][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-18 22:43:43.128018 I0418 22:23:43.130277 136397208229696 checkpoint_manager.py:1560] [process=0][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0418 22:23:43.130561 136269774448384 async_checkpointer.py:280] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0418 22:23:43.130707 136397208229696 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/nnx_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_03_dropout/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776550991.3809106, 'wait_for_prev_duration_secs': 30.981905221939087, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776551022.3648453, 'checkpointer_blocking_duration_secs': 0.7633674144744873, 'get_old_steps_start_time': 1776551023.128238, 'get_old_steps_duration_secs': 2.8371810913085938e-05, 'checkpoint_manager_blocking_start_time': 1776550991.3789196, 'checkpoint_manager_blocking_duration_secs': 31.751753091812134} I0418 22:23:43.130845 136397208229696 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0418 22:23:43.130891 136397208229696 checkpoint_manager.py:2020] [process=0][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0418 22:23:43.327066 136269208213248 atomicity.py:140] Creating tmp directory gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/nnx_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_03_dropout/checkpoints/9 I0418 22:23:45.075717 136269749270272 atomicity.py:140] Creating tmp directory gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/nnx_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_03_dropout/checkpoints/9/items I0418 22:23:48.371107 136268697339648 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/nnx_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_03_dropout/checkpoints/9/items/array_metadatas/process_0 I0418 22:24:26.875073 136268688946944 base_pytree_checkpoint_handler.py:1282] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 40.270208s (commit=39.032631s, array_metadata_write=1.237577s) I0418 22:24:26.876141 136268680554240 base_pytree_checkpoint_handler.py:130] [process=0] /jax/orbax/write/gbytes_per_sec: 36.070 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 43.792370319366455 s) (per-host) I0418 22:24:26.876213 136268680554240 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 43.748022s. I0418 22:24:28.286796 136268680554240 array_metadata_store.py:411] [process=0][thread=async_save] Validated ArrayMetadata from all 8 hosts. Time taken: 0.000368s. I0418 22:24:28.496265 136268680554240 ocdbt_utils.py:49] Param validation support for Zarr3 will be added later (b/362328389). I0418 22:24:29.571560 136268680554240 base_pytree_checkpoint_handler.py:1406] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 1.921041s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/nnx_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_03_dropout/checkpoints/9/items I0418 22:24:29.574346 136268680554240 atomicity.py:666] Finalizing gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/nnx_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_03_dropout/checkpoints/9/items I0418 22:24:30.085880 136268680554240 atomicity.py:666] Finalizing gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/nnx_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_03_dropout/checkpoints/9 I0418 22:24:31.440558 136268680554240 atomicity.py:847] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/nnx_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_03_dropout/checkpoints/9`. I0418 22:24:31.441397 136268680554240 event_tracking.py:138] [process=0] [async] Finished save (blocking + background) in 49.08 seconds @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/nnx_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_03_dropout/checkpoints/9 I0418 22:24:31.442869 136268680554240 async_checkpointer.py:160] [process=0][thread=async_save] Background save thread done. Time taken: 48.314676s. I0418 22:24:31.443083 136269774448384 async_checkpointer.py:288] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0418 22:24:31.443202 136269774448384 async_checkpointer.py:298] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0418 22:24:31.443265 136269774448384 checkpoint_manager.py:2137] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0418 22:24:31.445135 136269774448384 checkpoint_manager.py:2146] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0418 22:24:31.445279 136397208229696 checkpoint_manager.py:2032] [process=0][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9. I0418 22:24:31.445395 136397208229696 checkpoint_manager.py:2009] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0418 22:24:31.446363 136397208229696 metric_logger.py:196] completed step: 9, seconds: 0.010, TFLOP/s/device: 83.581, Tokens/s/device: 13358.380, total_weights: 4096, loss: 7.016, lm_loss: 7.016, perplexity: 1113.843 Per train step: Total TFLOPs: 0.80 split as 99.60% learnable weight flops and 0.40% attention flops XPK End: Sat Apr 18 22:24:41 UTC 2026 EXIT_CODE=0