XPK Start: Thu Apr 16 22:54:15 UTC 2026 PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used. 2026-04-16 22:54:38.679409: 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) I0416 22:54:39.207823 140520168998720 max_utils.py:273] Attempting to initialize the jax distributed system... I0416 22:54:48.247982 140520168998720 distributed.py:149] Starting JAX distributed service on [::]:8482 I0416 22:54:48.250244 140520168998720 distributed.py:172] Connecting to JAX distributed service on mt-11-optimizer-offload-1wxz7-slice-job-0-0.mt-11-optimizer-offload-1wxz7:8482 I0416 22:54:49.160809 140520168998720 max_utils.py:284] Jax distributed system initialized! I0416 22:54:54.210130 140520168998720 max_utils.py:800] System Information: Jax Version: 0.9.2 I0416 22:54:54.210232 140520168998720 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0416 22:54:54.210272 140520168998720 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 I0416 22:54:54.210307 140520168998720 train_utils.py:377] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0416 22:54:54.873347 140520168998720 maxtext_utils.py:1687] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0416 22:54:54.986206 140520168998720 checkpointing.py:688] Setting up checkpoint logger... I0416 22:54:54.986318 140520168998720 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0416 22:54:54.986360 140520168998720 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0416 22:54:54.986585 140520168998720 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 0x7fccc8d19160>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0416 22:54:57.829879 140520168998720 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0416 22:54:57.830113 140520168998720 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 0x7fb868170c50>}, handler_registry=None I0416 22:54:57.830358 140520168998720 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7fb868170c50>` 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`. I0416 22:54:57.830405 140520168998720 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7fb7903f7fb0>` 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`. I0416 22:54:57.830440 140520168998720 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 0x7fb868170c50>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7fb868170c50>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7fb7903f7fb0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7fb7903f7fb0>}). I0416 22:54:57.830760 140520168998720 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0416 22:54:57.830851 140520168998720 async_checkpointer.py:192] [process=0][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7fb8685f1ee0> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0416 22:54:59.309431 140520168998720 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_11_optimizer_offload_false/checkpoints I0416 22:54:59.312465 140520168998720 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_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_11_optimizer_offload_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7fb868172540> I0416 22:54:59.312576 140520168998720 checkpointing.py:302] Checkpoint manager created! I0416 22:55:00.256301 140520168998720 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0416 22:55:00.256417 140520168998720 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0416 22:55:01.642021 140520168998720 maxtext_utils.py:1805] decoder/decoder_norm/scale/value Shape: float32[2048] Physical: (None,) I0416 22:55:01.642143 140520168998720 maxtext_utils.py:1805] decoder/layers/mlp/wi_0/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0416 22:55:01.642194 140520168998720 maxtext_utils.py:1805] decoder/layers/mlp/wi_1/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0416 22:55:01.642237 140520168998720 maxtext_utils.py:1805] decoder/layers/mlp/wo/kernel/value Shape: float32[7168,16,2048] Physical: (None, None, 'fsdp') I0416 22:55:01.642275 140520168998720 maxtext_utils.py:1805] decoder/layers/post_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0416 22:55:01.642307 140520168998720 maxtext_utils.py:1805] decoder/layers/pre_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0416 22:55:01.642343 140520168998720 maxtext_utils.py:1805] decoder/layers/self_attention/key/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0416 22:55:01.642377 140520168998720 maxtext_utils.py:1805] decoder/layers/self_attention/out/kernel/value Shape: float32[16,16,128,2048] Physical: (None, None, None, 'fsdp') I0416 22:55:01.642411 140520168998720 maxtext_utils.py:1805] decoder/layers/self_attention/query/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0416 22:55:01.642444 140520168998720 maxtext_utils.py:1805] decoder/layers/self_attention/value/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0416 22:55:01.642476 140520168998720 maxtext_utils.py:1805] decoder/logits_dense/kernel/value Shape: float32[2048,32000] Physical: ('fsdp', None) I0416 22:55:01.642507 140520168998720 maxtext_utils.py:1805] token_embedder/embedding/value Shape: float32[32000,2048] Physical: (None, 'fsdp') I0416 22:55:02.044810 140520168998720 nnx_decoders.py:465] nnx_decoders/carry Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0416 22:55:02.044926 140520168998720 nnx_decoders.py:465] nnx_decoders/carry Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0416 22:55:02.050330 140520168998720 nnx_decoders.py:465] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0416 22:55:02.050385 140520168998720 nnx_decoders.py:465] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0416 22:55:02.066679 140520168998720 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0416 22:55:02.066743 140520168998720 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0416 22:55:02.082250 140520168998720 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0416 22:55:02.082305 140520168998720 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0416 22:55:02.106099 140520168998720 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0416 22:55:02.106165 140520168998720 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0416 22:55:02.121949 140520168998720 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0416 22:55:02.122019 140520168998720 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0416 22:55:02.137573 140520168998720 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0416 22:55:02.137630 140520168998720 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0416 22:55:02.166718 140520168998720 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0416 22:55:02.166786 140520168998720 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0416 22:55:02.186413 140520168998720 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0416 22:55:02.186474 140520168998720 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0416 22:55:13.391887 140520168998720 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. I0416 22:55:13.400928 140520168998720 metric_logger.py:289] number parameters: 1.104 billion I0416 22:55:24.905474 140520168998720 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0416 22:55:25.057579 140520168998720 checkpointing.py:798] Waited 0.15208792686462402 seconds for step 0 to finish before starting checkpointing. I0416 22:55:25.060455 140520168998720 checkpoint_manager.py:2009] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0416 22:55:25.062300 140520168998720 checkpoint_manager.py:1512] [process=0] Saving checkpoint at step 0 I0416 22:55:25.063811 140520168998720 event_tracking.py:70] [process=0] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_11_optimizer_offload_false/checkpoints/0. I0416 22:55:25.359733 140520168998720 signaling_client.py:364] Using JaxDistributedSignalingClient I0416 22:55:25.379026 140520168998720 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array. I0416 22:55:25.379097 140520168998720 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 I0416 22:55:25.648826 140392627246848 atomicity.py:140] Creating tmp directory gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_11_optimizer_offload_false/checkpoints/0 I0416 22:55:25.650514 140520168998720 base_pytree_checkpoint_handler.py:154] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.272954s I0416 22:55:25.651424 140520168998720 base_pytree_checkpoint_handler.py:130] [process=0] /jax/orbax/write/blocking_gbytes_per_sec: 5.436 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28379321098327637 s) (per-host) I0416 22:55:25.651499 140520168998720 base_pytree_checkpoint_handler.py:768] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 0.283889s (batch_requests_ready=0.002984s, total_serialization_initiated=0.280080s, others=0.000825s) I0416 22:55:25.651583 140520168998720 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.287979s (all_items=0.000017s, per_item={'items': '0.00001717'}, temp_paths=0.287962) I0416 22:55:25.652381 140520168998720 event_tracking.py:125] [process=0] [async] Finished blocking save in 0.59 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_11_optimizer_offload_false/checkpoints/0. I0416 22:55:25.652719 140392635639552 async_checkpointer.py:76] [process=0][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-16 23:15:25.652681 I0416 22:55:25.664747 140520168998720 checkpoint_manager.py:1560] [process=0][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0416 22:55:25.665044 140390487828224 async_checkpointer.py:280] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0416 22:55:25.665202 140520168998720 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_11_optimizer_offload_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776380125.0604355, 'wait_for_prev_duration_secs': 6.270408630371094e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776380125.062352, 'checkpointer_blocking_duration_secs': 0.5905306339263916, 'get_old_steps_start_time': 1776380125.652908, 'get_old_steps_duration_secs': 2.8133392333984375e-05, 'checkpoint_manager_blocking_start_time': 1776380125.0579996, 'checkpoint_manager_blocking_duration_secs': 0.6071631908416748} I0416 22:55:25.665307 140520168998720 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0416 22:55:25.665376 140520168998720 max_utils.py:750] Memstats: After params initialized: I0416 22:55:25.665428 140520168998720 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_0(process=0,(0,0,0,0)) I0416 22:55:25.665462 140520168998720 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_1(process=0,(1,0,0,0)) I0416 22:55:25.665489 140520168998720 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_4(process=0,(0,1,0,0)) I0416 22:55:25.665513 140520168998720 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_5(process=0,(1,1,0,0)) I0416 22:55:26.008584 140520168998720 metric_logger.py:185] completed step: 0, seconds: 11.189, TFLOP/s/device: 1.214, Tokens/s/device: 183.044, total_weights: 65536, loss: 10.874 I0416 22:55:26.011690 140520168998720 metric_logger.py:269] To see full metrics 'tensorboard --logdir=gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_11_optimizer_offload_false/tensorboard/' I0416 22:55:26.445947 140520168998720 metric_logger.py:185] completed step: 1, seconds: 1.100, TFLOP/s/device: 12.356, Tokens/s/device: 1862.357, total_weights: 65536, loss: 10.874 I0416 22:55:26.587610 140520168998720 metric_logger.py:185] completed step: 2, seconds: 0.438, TFLOP/s/device: 30.999, Tokens/s/device: 4672.524, total_weights: 65536, loss: 10.262 I0416 22:55:26.735209 140520168998720 metric_logger.py:185] completed step: 3, seconds: 0.012, TFLOP/s/device: 1139.573, Tokens/s/device: 171768.850, total_weights: 65536, loss: 9.732 I0416 22:55:28.143633 140392137746176 atomicity.py:140] Creating tmp directory gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_11_optimizer_offload_false/checkpoints/0/items I0416 22:55:28.333311 140389957068544 checkpoint.py:188] Wrote Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776380127892053720, 'commit_timestamp_nsecs': None, 'custom_metadata': {}}, json={"item_handlers": null, "metrics": {}, "performance_metrics": {}, "init_timestamp_nsecs": 1776380127892053720, "commit_timestamp_nsecs": null, "custom_metadata": {}} to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_11_optimizer_offload_false/checkpoints/0/_CHECKPOINT_METADATA I0416 22:55:29.748259 2808 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0416 22:55:31.463895 140391043032832 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_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_11_optimizer_offload_false/checkpoints/0/items/array_metadatas/process_0 I0416 22:55:49.223735 140520168998720 metric_logger.py:185] completed step: 4, seconds: 0.144, TFLOP/s/device: 94.458, Tokens/s/device: 14237.745, total_weights: 65536, loss: 9.274 I0416 22:55:49.234188 140520168998720 metric_logger.py:185] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.713, Tokens/s/device: 13974.753, total_weights: 65536, loss: 8.888 I0416 22:55:49.378689 140520168998720 metric_logger.py:185] completed step: 6, seconds: 22.487, TFLOP/s/device: 0.604, Tokens/s/device: 91.074, total_weights: 65536, loss: 8.589 I0416 22:55:49.526027 140520168998720 metric_logger.py:185] completed step: 7, seconds: 0.008, TFLOP/s/device: 1682.200, Tokens/s/device: 253559.490, total_weights: 65536, loss: 8.380 I0416 22:55:49.673435 140520168998720 metric_logger.py:185] completed step: 8, seconds: 0.146, TFLOP/s/device: 93.254, Tokens/s/device: 14056.280, total_weights: 65536, loss: 8.251 I0416 22:55:49.821852 140520168998720 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0416 22:55:49.822582 140520168998720 checkpointing.py:798] Waited 0.0007512569427490234 seconds for step 9 to finish before starting checkpointing. I0416 22:55:49.824551 140520168998720 checkpoint_manager.py:2020] [process=0][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0416 22:56:06.154832 140391034640128 base_pytree_checkpoint_handler.py:1282] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 36.419781s (commit=35.174370s, array_metadata_write=1.245411s) I0416 22:56:06.155929 140392635639552 base_pytree_checkpoint_handler.py:130] [process=0] /jax/orbax/write/gbytes_per_sec: 38.727 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 40.788254737854004 s) (per-host) I0416 22:56:06.156063 140392635639552 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 40.503232s. I0416 22:56:07.381268 140392635639552 checkpoint.py:228] Read Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776380127892053720, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} from gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_11_optimizer_offload_false/checkpoints/0/_CHECKPOINT_METADATA I0416 22:56:08.120939 140389957068544 checkpoint.py:247] Updated Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776380127892053720, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_11_optimizer_offload_false/checkpoints/0/_CHECKPOINT_METADATA I0416 22:56:08.525349 140392635639552 array_metadata_store.py:411] [process=0][thread=async_save] Validated ArrayMetadata from all 8 hosts. Time taken: 0.000452s. I0416 22:56:08.801497 140392635639552 ocdbt_utils.py:49] Param validation support for Zarr3 will be added later (b/362328389). I0416 22:56:09.935774 140392635639552 base_pytree_checkpoint_handler.py:1406] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 2.401354s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_11_optimizer_offload_false/checkpoints/0/items I0416 22:56:09.937445 140392635639552 atomicity.py:666] Finalizing gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_11_optimizer_offload_false/checkpoints/0/items I0416 22:56:10.891754 140392635639552 atomicity.py:666] Finalizing gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_11_optimizer_offload_false/checkpoints/0 I0416 22:56:12.277600 140392635639552 atomicity.py:847] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_11_optimizer_offload_false/checkpoints/0`. I0416 22:56:12.278420 140392635639552 event_tracking.py:138] [process=0] [async] Finished save (blocking + background) in 47.22 seconds @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_11_optimizer_offload_false/checkpoints/0 I0416 22:56:12.279889 140392635639552 async_checkpointer.py:160] [process=0][thread=async_save] Background save thread done. Time taken: 46.627056s. I0416 22:56:12.280072 140390487828224 async_checkpointer.py:288] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0416 22:56:12.280198 140390487828224 async_checkpointer.py:298] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0416 22:56:12.280274 140390487828224 checkpoint_manager.py:2137] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0416 22:56:12.282790 140390487828224 checkpoint_manager.py:2146] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0416 22:56:12.282984 140520168998720 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. W0416 22:56:12.283115 140520168998720 checkpoint_manager.py:1452] Waiting for previous save to complete took 22.458564 seconds. If this number is high, consider checkpointing less frequently. I0416 22:56:12.284913 140520168998720 checkpoint_manager.py:1512] [process=0] Saving checkpoint at step 9 I0416 22:56:12.286978 140520168998720 event_tracking.py:70] [process=0] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_11_optimizer_offload_false/checkpoints/9. I0416 22:56:12.569967 140520168998720 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array. I0416 22:56:12.570062 140520168998720 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 I0416 22:56:12.597097 140520168998720 base_pytree_checkpoint_handler.py:154] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.028582s I0416 22:56:12.597951 140520168998720 base_pytree_checkpoint_handler.py:130] [process=0] /jax/orbax/write/blocking_gbytes_per_sec: 41.261 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.03738546371459961 s) (per-host) I0416 22:56:12.598033 140520168998720 base_pytree_checkpoint_handler.py:768] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 0.037488s (batch_requests_ready=0.002606s, total_serialization_initiated=0.034102s, others=0.000780s) I0416 22:56:12.598134 140520168998720 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.041418s (all_items=0.000016s, per_item={'items': '0.00001597'}, temp_paths=0.041402) I0416 22:56:12.598828 140520168998720 event_tracking.py:125] [process=0] [async] Finished blocking save in 0.31 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_11_optimizer_offload_false/checkpoints/9. I0416 22:56:12.599146 140391055611648 async_checkpointer.py:76] [process=0][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-16 23:16:12.599110 I0416 22:56:12.606480 140520168998720 checkpoint_manager.py:1560] [process=0][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0416 22:56:12.606723 140390487828224 async_checkpointer.py:280] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0416 22:56:12.606893 140520168998720 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_11_optimizer_offload_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776380149.824519, 'wait_for_prev_duration_secs': 22.458563566207886, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776380172.2849512, 'checkpointer_blocking_duration_secs': 0.3143293857574463, 'get_old_steps_start_time': 1776380172.5993042, 'get_old_steps_duration_secs': 3.0279159545898438e-05, 'checkpoint_manager_blocking_start_time': 1776380149.8228104, 'checkpoint_manager_blocking_duration_secs': 22.784045696258545} I0416 22:56:12.607003 140520168998720 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0416 22:56:12.607048 140520168998720 checkpoint_manager.py:2020] [process=0][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0416 22:56:12.805417 140392635639552 atomicity.py:140] Creating tmp directory gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_11_optimizer_offload_false/checkpoints/9 I0416 22:56:14.841702 140391592482560 atomicity.py:140] Creating tmp directory gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_11_optimizer_offload_false/checkpoints/9/items I0416 22:56:17.867821 140391072397056 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_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_11_optimizer_offload_false/checkpoints/9/items/array_metadatas/process_0 I0416 22:56:56.478799 140391064004352 base_pytree_checkpoint_handler.py:1282] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 40.347564s (commit=39.134123s, array_metadata_write=1.213441s) I0416 22:56:56.479967 140391055611648 base_pytree_checkpoint_handler.py:130] [process=0] /jax/orbax/write/gbytes_per_sec: 35.966 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 43.91936421394348 s) (per-host) I0416 22:56:56.480096 140391055611648 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 43.880838s. I0416 22:56:57.980433 140391055611648 array_metadata_store.py:411] [process=0][thread=async_save] Validated ArrayMetadata from all 8 hosts. Time taken: 0.000367s. I0416 22:56:58.646721 140391055611648 ocdbt_utils.py:49] Param validation support for Zarr3 will be added later (b/362328389). I0416 22:56:59.589249 140391055611648 base_pytree_checkpoint_handler.py:1406] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 2.230824s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_11_optimizer_offload_false/checkpoints/9/items I0416 22:56:59.594197 140391055611648 atomicity.py:666] Finalizing gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_11_optimizer_offload_false/checkpoints/9/items I0416 22:57:00.109919 140391055611648 atomicity.py:666] Finalizing gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_11_optimizer_offload_false/checkpoints/9 I0416 22:57:01.576704 140391055611648 atomicity.py:847] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_11_optimizer_offload_false/checkpoints/9`. I0416 22:57:01.577415 140391055611648 event_tracking.py:138] [process=0] [async] Finished save (blocking + background) in 49.29 seconds @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_11_optimizer_offload_false/checkpoints/9 I0416 22:57:01.579887 140391055611648 async_checkpointer.py:160] [process=0][thread=async_save] Background save thread done. Time taken: 48.980627s. I0416 22:57:01.580077 140390487828224 async_checkpointer.py:288] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0416 22:57:01.580191 140390487828224 async_checkpointer.py:298] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0416 22:57:01.580252 140390487828224 checkpoint_manager.py:2137] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0416 22:57:01.581941 140390487828224 checkpoint_manager.py:2146] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0416 22:57:01.582096 140520168998720 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. I0416 22:57:01.582265 140520168998720 checkpoint_manager.py:2009] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0416 22:57:01.582896 140520168998720 metric_logger.py:185] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.303, Tokens/s/device: 13912.949, total_weights: 65536, loss: 8.175 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Thu Apr 16 22:57:10 UTC 2026 EXIT_CODE=0