XPK Start: Sat Apr 25 21:36:52 UTC 2026 PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used. `rope_parameters`'s factor field must be a float >= 1, got 40 `rope_parameters`'s beta_fast field must be a float, got 32 `rope_parameters`'s beta_slow field must be a float, got 1 DeepseekV32Config got `key=rope_scaling` in kwargs but hasn't set it as attribute. For RoPE standardization you need to set `self.rope_parameters` in model's config. 2026-04-25 21:37:17.096471: 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) I0425 21:37:17.305855 133740259702592 max_utils.py:273] Attempting to initialize the jax distributed system... I0425 21:37:26.346049 133740259702592 distributed.py:149] Starting JAX distributed service on [::]:8482 I0425 21:37:26.348520 133740259702592 distributed.py:172] Connecting to JAX distributed service on mt-16-zarr3-false-rs-gj3g3-slice-job-0-0.mt-16-zarr3-false-rs-gj3g3:8482 I0425 21:37:27.383044 133740259702592 max_utils.py:284] Jax distributed system initialized! I0425 21:37:33.650320 133740259702592 max_utils.py:800] System Information: Jax Version: 0.9.2 I0425 21:37:33.650427 133740259702592 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0425 21:37:33.650466 133740259702592 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 I0425 21:37:33.650502 133740259702592 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0425 21:37:34.344140 133740259702592 maxtext_utils.py:1565] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0425 21:37:34.344447 133740259702592 checkpointing.py:677] Setting up checkpoint logger... I0425 21:37:34.344513 133740259702592 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=False I0425 21:37:34.344571 133740259702592 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0425 21:37:34.344922 133740259702592 base_pytree_checkpoint_handler.py:441] Created BasePyTreeCheckpointHandler: use_ocdbt=True, use_zarr3=False, pytree_metadata_options=PyTreeMetadataOptions(support_rich_types=False), array_metadata_store=<orbax.checkpoint._src.metadata.array_metadata_store.Store object at 0x79a21d04c8c0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0425 21:37:35.633440 133740259702592 checkpointing.py:265] Enabling policy for fixed interval checkpointing. I0425 21:37:35.633678 133740259702592 checkpoint_manager.py:708] [process=6][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x798dec4b3da0>}, handler_registry=None I0425 21:37:35.633944 133740259702592 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x798dec4b3da0>` 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`. I0425 21:37:35.633999 133740259702592 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x798dec5f6630>` 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`. I0425 21:37:35.634039 133740259702592 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 0x798dec4b3da0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x798dec4b3da0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x798dec5f6630>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x798dec5f6630>}). I0425 21:37:35.634397 133740259702592 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0425 21:37:35.634465 133740259702592 async_checkpointer.py:192] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x798d047432e0> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0425 21:37:37.141360 133618840102656 checkpoint.py:228] Read Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1777152791154762888, 'commit_timestamp_nsecs': 1777152837417863419, 'custom_metadata': {}} from gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_16_zarr3_false/checkpoints/0/_CHECKPOINT_METADATA I0425 21:37:37.397484 133618840102656 checkpoint_manager.py:1871] Missing metrics for step 0 I0425 21:37:37.821427 133740259702592 checkpoint_manager.py:1812] Found 3 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_16_zarr3_false/checkpoints I0425 21:37:37.824126 133740259702592 checkpoint_manager.py:929] [process=6][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/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_16_zarr3_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x798dec4b7740> I0425 21:37:37.824240 133740259702592 checkpointing.py:301] Checkpoint manager created! I0425 21:37:38.764038 133740259702592 nnx_wrappers.py:453] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0425 21:37:38.764169 133740259702592 nnx_wrappers.py:453] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0425 21:37:39.143077 133740259702592 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0425 21:37:39.143182 133740259702592 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0425 21:37:39.159739 133740259702592 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0425 21:37:39.159799 133740259702592 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0425 21:37:39.183350 133740259702592 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0425 21:37:39.183416 133740259702592 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 21:37:39.200180 133740259702592 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0425 21:37:39.200242 133740259702592 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 21:37:39.216852 133740259702592 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0425 21:37:39.216910 133740259702592 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 21:37:39.241758 133740259702592 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0425 21:37:39.241834 133740259702592 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 21:37:39.262964 133740259702592 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0425 21:37:39.263034 133740259702592 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0425 21:37:39.472169 133740259702592 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint I0425 21:37:39.472280 133740259702592 checkpointing.py:581] restoring from this run's directory step 9 I0425 21:37:39.714767 133740259702592 event_tracking.py:70] [process=6] [sync] Started load checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_16_zarr3_false/checkpoints/9. I0425 21:37:39.958517 133740259702592 checkpointer.py:307] Restoring checkpoint from gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_16_zarr3_false/checkpoints/9. I0425 21:37:39.958960 133740259702592 event_tracking.py:125] [process=6] [sync] Finished blocking load in 0.24 seconds. Continuing load @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_16_zarr3_false/checkpoints/9. I0425 21:37:41.805942 1450 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0425 21:37:47.773988 133740259702592 jax_array_handlers.py:843] [process=6] /jax/orbax/read/worker/io/requested throughput: 264.526 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 5.973976373672485 s) (per-host) I0425 21:37:47.779725 133740259702592 base_pytree_checkpoint_handler.py:130] [process=6] /jax/checkpoint/read/gbytes_per_sec: 248.447 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 6.3699445724487305 s) (per-host) I0425 21:37:50.698892 133740259702592 event_tracking.py:138] [process=6] [sync] Finished load in 10.98 seconds @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_16_zarr3_false/checkpoints/9 I0425 21:37:50.699049 133740259702592 standard_logger.py:34] {'step': 9, 'event_type': 'restore', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_16_zarr3_false/checkpoints', 'checkpointer_start_time': 1777153059.7146702, 'checkpointer_duration_secs': 10.984347820281982, 'checkpoint_manager_start_time': 1777153059.4725325, 'checkpoint_manager_duration_secs': 11.22648811340332} fsdp: 32 I0425 21:37:51.117783 133740259702592 maxtext_utils.py:1668] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0425 21:37:51.117922 133740259702592 maxtext_utils.py:1668] params/params/decoder/layers/mlp/wi_0/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0425 21:37:51.117975 133740259702592 maxtext_utils.py:1668] params/params/decoder/layers/mlp/wi_1/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0425 21:37:51.118033 133740259702592 maxtext_utils.py:1668] params/params/decoder/layers/mlp/wo/kernel Shape: float32[7168,16,2048] Logical: P('mlp', 'layers', 'embed') Physical: (None, None, 'fsdp') I0425 21:37:51.118086 133740259702592 maxtext_utils.py:1668] params/params/decoder/layers/post_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0425 21:37:51.118144 133740259702592 maxtext_utils.py:1668] params/params/decoder/layers/pre_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0425 21:37:51.118198 133740259702592 maxtext_utils.py:1668] params/params/decoder/layers/self_attention/key/kernel Shape: float32[2048,16,16,128] Logical: P('embed', 'layers', 'kv_heads', 'kv_head_dim') Physical: ('fsdp', None, None, None) I0425 21:37:51.118256 133740259702592 maxtext_utils.py:1668] params/params/decoder/layers/self_attention/out/kernel Shape: float32[16,16,128,2048] Logical: P('heads', 'layers', 'kv', 'embed') Physical: (None, None, None, 'fsdp') I0425 21:37:51.118298 133740259702592 maxtext_utils.py:1668] params/params/decoder/layers/self_attention/query/kernel Shape: float32[2048,16,16,128] Logical: P('embed', 'layers', 'q_heads', 'kv') Physical: ('fsdp', None, None, None) I0425 21:37:51.118335 133740259702592 maxtext_utils.py:1668] params/params/decoder/layers/self_attention/value/kernel Shape: float32[2048,16,16,128] Logical: P('embed', 'layers', 'kv_heads', 'kv_head_dim') Physical: ('fsdp', None, None, None) I0425 21:37:51.118382 133740259702592 maxtext_utils.py:1668] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', None) I0425 21:37:51.118428 133740259702592 maxtext_utils.py:1668] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0425 21:37:51.604279 133740259702592 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0425 21:37:51.604373 133740259702592 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0425 21:37:51.620120 133740259702592 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0425 21:37:51.620182 133740259702592 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0425 21:38:02.669420 133740259702592 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. I0425 21:38:02.670234 133740259702592 metric_logger.py:301] number parameters: 1.104 billion I0425 21:38:14.150348 133740259702592 checkpointing.py:772] Waiting for step 10 to finish before checkpoint... I0425 21:38:14.374552 133740259702592 checkpointing.py:776] Waited 0.22417974472045898 seconds for step 10 to finish before starting checkpointing. I0425 21:38:14.378518 133740259702592 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0425 21:38:14.379885 133740259702592 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 10 I0425 21:38:14.381515 133740259702592 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_16_zarr3_false/checkpoints/10. I0425 21:38:15.027446 133740259702592 signaling_client.py:364] Using JaxDistributedSignalingClient I0425 21:38:15.028494 133740259702592 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0425 21:38:15.028551 133740259702592 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 I0425 21:38:15.311340 133740259702592 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.283970s I0425 21:38:15.311509 133740259702592 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 5.359 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28783392906188965 s) (per-host) I0425 21:38:15.311560 133740259702592 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.287895s (batch_requests_ready=0.002150s, total_serialization_initiated=0.285676s, others=0.000069s) I0425 21:38:15.311650 133740259702592 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.292398s (all_items=0.000018s, per_item={'items': '0.00001764'}, temp_paths=0.292381) I0425 21:38:15.312382 133740259702592 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.93 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_16_zarr3_false/checkpoints/10. I0425 21:38:15.312735 133618303231744 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-25 21:58:15.312697 I0425 21:38:15.315272 133740259702592 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=10] Starting CheckpointManager Save Finalize thread=save_finalize I0425 21:38:15.315557 133614553528064 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0425 21:38:15.315710 133740259702592 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_16_zarr3_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777153094.3784988, 'wait_for_prev_duration_secs': 6.747245788574219e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777153094.3799238, 'checkpointer_blocking_duration_secs': 0.9329698085784912, 'get_old_steps_start_time': 1777153095.3129175, 'get_old_steps_duration_secs': 3.2901763916015625e-05, 'checkpoint_manager_blocking_start_time': 1777153094.3750153, 'checkpoint_manager_blocking_duration_secs': 0.9406580924987793} I0425 21:38:15.315826 133740259702592 checkpointing.py:408] Started an asynchronous checkpoint save for step 10 I0425 21:38:15.315877 133740259702592 max_utils.py:750] Memstats: After params initialized: I0425 21:38:15.315926 133740259702592 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0)) I0425 21:38:15.315958 133740259702592 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0)) I0425 21:38:15.315984 133740259702592 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0)) I0425 21:38:15.316008 133740259702592 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0)) I0425 21:38:15.629888 133740259702592 metric_logger.py:196] completed step: 10, seconds: 11.480, TFLOP/s/device: 1.184, Tokens/s/device: 178.397, total_weights: 65536, loss: 6.833, lm_loss: 6.833, perplexity: 927.869 I0425 21:38:15.798737 133740259702592 metric_logger.py:196] completed step: 11, seconds: 1.478, TFLOP/s/device: 9.193, Tokens/s/device: 1385.661, total_weights: 65536, loss: 6.527, lm_loss: 6.527, perplexity: 683.659 I0425 21:38:15.946478 133740259702592 metric_logger.py:196] completed step: 12, seconds: 0.022, TFLOP/s/device: 623.721, Tokens/s/device: 94013.955, total_weights: 65536, loss: 6.265, lm_loss: 6.265, perplexity: 526.068 I0425 21:38:16.093782 133740259702592 metric_logger.py:196] completed step: 13, seconds: 0.153, TFLOP/s/device: 88.697, Tokens/s/device: 13369.368, total_weights: 65536, loss: 6.045, lm_loss: 6.045, perplexity: 422.001 I0425 21:38:16.098290 133740259702592 checkpointing.py:772] Waiting for step 15 to finish before checkpoint... I0425 21:38:16.387778 133740259702592 checkpointing.py:776] Waited 0.28945159912109375 seconds for step 15 to finish before starting checkpointing. I0425 21:38:16.390887 133740259702592 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=10][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0425 21:38:21.120140 133617372100352 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_16_zarr3_false/checkpoints/10/items/array_metadatas/process_6 I0425 21:38:57.933833 133618303231744 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 36.812 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.91011834144592 s) (per-host) I0425 21:38:57.933940 133618303231744 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.621092s. I0425 21:39:06.906422 133618303231744 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 51.593554s. I0425 21:39:06.906713 133614553528064 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0425 21:39:06.906829 133614553528064 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0425 21:39:06.906877 133614553528064 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=10] CheckpointManager Save Finalize is syncing with other hosts... I0425 21:39:06.908476 133614553528064 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=10] CheckpointManager Save Finalize is done on all hosts. I0425 21:39:06.908690 133740259702592 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=10][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=10. W0425 21:39:06.908822 133740259702592 checkpoint_manager.py:1452] Waiting for previous save to complete took 50.517937 seconds. If this number is high, consider checkpointing less frequently. I0425 21:39:06.910729 133740259702592 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 15 I0425 21:39:06.913126 133740259702592 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_16_zarr3_false/checkpoints/15. I0425 21:39:07.622350 133740259702592 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0425 21:39:07.622447 133740259702592 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 I0425 21:39:07.647896 133740259702592 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.026798s I0425 21:39:07.648078 133740259702592 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 51.010 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.030240774154663086 s) (per-host) I0425 21:39:07.648196 133740259702592 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.030365s (batch_requests_ready=0.001769s, total_serialization_initiated=0.028465s, others=0.000131s) I0425 21:39:07.648318 133740259702592 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.035331s (all_items=0.000013s, per_item={'items': '0.00001264'}, temp_paths=0.035319) I0425 21:39:07.649118 133740259702592 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.74 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_16_zarr3_false/checkpoints/15. I0425 21:39:07.649450 133617372100352 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-25 21:59:07.649408 I0425 21:39:07.660680 133740259702592 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=15] Starting CheckpointManager Save Finalize thread=save_finalize I0425 21:39:07.661004 133614553528064 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0425 21:39:07.661187 133740259702592 standard_logger.py:34] {'step': 15, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_16_zarr3_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777153096.3908565, 'wait_for_prev_duration_secs': 50.517937421798706, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777153146.910768, 'checkpointer_blocking_duration_secs': 0.7388355731964111, 'get_old_steps_start_time': 1777153147.6496253, 'get_old_steps_duration_secs': 3.0517578125e-05, 'checkpoint_manager_blocking_start_time': 1777153096.3884528, 'checkpoint_manager_blocking_duration_secs': 51.27270317077637} I0425 21:39:07.661302 133740259702592 checkpointing.py:408] Started an asynchronous checkpoint save for step 15 I0425 21:39:07.662057 133740259702592 metric_logger.py:196] completed step: 14, seconds: 0.148, TFLOP/s/device: 91.981, Tokens/s/device: 13864.443, total_weights: 65536, loss: 5.864, lm_loss: 5.864, perplexity: 352.193 I0425 21:39:07.667957 133740259702592 metric_logger.py:196] completed step: 15, seconds: 0.147, TFLOP/s/device: 92.329, Tokens/s/device: 13916.825, total_weights: 65536, loss: 5.719, lm_loss: 5.719, perplexity: 304.661 I0425 21:39:12.909718 133618294839040 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_16_zarr3_false/checkpoints/15/items/array_metadatas/process_6 I0425 21:39:28.540082 133740259702592 metric_logger.py:196] completed step: 16, seconds: 51.568, TFLOP/s/device: 0.263, Tokens/s/device: 39.714, total_weights: 65536, loss: 5.605, lm_loss: 5.605, perplexity: 271.872 I0425 21:39:28.687488 133740259702592 metric_logger.py:196] completed step: 17, seconds: 20.726, TFLOP/s/device: 0.656, Tokens/s/device: 98.813, total_weights: 65536, loss: 5.517, lm_loss: 5.517, perplexity: 248.975 I0425 21:39:28.834631 133740259702592 metric_logger.py:196] completed step: 18, seconds: 0.152, TFLOP/s/device: 89.340, Tokens/s/device: 13466.331, total_weights: 65536, loss: 5.448, lm_loss: 5.448, perplexity: 232.333 I0425 21:39:28.981348 133740259702592 checkpointing.py:772] Waiting for step 19 to finish before checkpoint... I0425 21:39:28.982040 133740259702592 checkpointing.py:776] Waited 0.0007104873657226562 seconds for step 19 to finish before starting checkpointing. I0425 21:39:28.984142 133740259702592 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=15][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0425 21:39:49.757724 133617372100352 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 37.485 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.13984727859497 s) (per-host) I0425 21:39:49.757834 133617372100352 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.108264s. I0425 21:39:59.234929 133617372100352 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 51.585342s. I0425 21:39:59.235226 133614553528064 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0425 21:39:59.235366 133614553528064 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0425 21:39:59.235424 133614553528064 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=15] CheckpointManager Save Finalize is syncing with other hosts... I0425 21:39:59.236976 133614553528064 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=15] CheckpointManager Save Finalize is done on all hosts. I0425 21:39:59.237156 133740259702592 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=15][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=15. W0425 21:39:59.237271 133740259702592 checkpoint_manager.py:1452] Waiting for previous save to complete took 30.253138 seconds. If this number is high, consider checkpointing less frequently. I0425 21:39:59.238940 133740259702592 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 19 I0425 21:39:59.241083 133740259702592 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_16_zarr3_false/checkpoints/19. I0425 21:39:59.527856 133740259702592 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0425 21:39:59.527947 133740259702592 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 I0425 21:39:59.553994 133740259702592 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.027084s I0425 21:39:59.554178 133740259702592 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 50.471 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.030563831329345703 s) (per-host) I0425 21:39:59.554230 133740259702592 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.030627s (batch_requests_ready=0.001648s, total_serialization_initiated=0.028910s, others=0.000068s) I0425 21:39:59.554326 133740259702592 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.034647s (all_items=0.000011s, per_item={'items': '0.00001073'}, temp_paths=0.034636) I0425 21:39:59.554936 133740259702592 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.32 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_16_zarr3_false/checkpoints/19. I0425 21:39:59.555252 133614502397696 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-25 21:59:59.555218 I0425 21:39:59.558497 133740259702592 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=19] Starting CheckpointManager Save Finalize thread=save_finalize I0425 21:39:59.558779 133614553528064 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0425 21:39:59.558935 133740259702592 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_16_zarr3_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777153168.984111, 'wait_for_prev_duration_secs': 30.253137826919556, 'time_between_consecutive_saves_sec': 22.075596809387207, 'checkpointer_blocking_start_time': 1777153199.2389789, 'checkpointer_blocking_duration_secs': 0.31641578674316406, 'get_old_steps_start_time': 1777153199.555412, 'get_old_steps_duration_secs': 2.6941299438476562e-05, 'checkpoint_manager_blocking_start_time': 1777153168.9822936, 'checkpoint_manager_blocking_duration_secs': 30.57660746574402} I0425 21:39:59.559057 133740259702592 checkpointing.py:408] Started an asynchronous checkpoint save for step 19 I0425 21:39:59.559119 133740259702592 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=19][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0425 21:40:04.719833 133613453059840 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_16_zarr3_false/checkpoints/19/items/array_metadatas/process_6 I0425 21:40:42.129788 133614502397696 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 37.074 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.606136322021484 s) (per-host) I0425 21:40:42.129913 133614502397696 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.574553s. I0425 21:40:49.393467 133614502397696 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 49.838090s. I0425 21:40:49.393797 133614553528064 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0425 21:40:49.393949 133614553528064 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0425 21:40:49.393993 133614553528064 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=19] CheckpointManager Save Finalize is syncing with other hosts... I0425 21:40:49.396599 133614553528064 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=19] CheckpointManager Save Finalize is done on all hosts. I0425 21:40:49.396779 133740259702592 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=19][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=19. I0425 21:40:49.396923 133740259702592 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0425 21:40:49.397866 133740259702592 metric_logger.py:196] completed step: 19, seconds: 0.147, TFLOP/s/device: 92.231, Tokens/s/device: 13902.088, total_weights: 65536, loss: 5.391, lm_loss: 5.391, perplexity: 219.349 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Sat Apr 25 21:41:02 UTC 2026 EXIT_CODE=0