XPK Start: Fri Apr 24 20:35:05 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. 2026-04-24 20:35:30.133127: 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) I0424 20:35:30.347019 138912888584000 max_utils.py:273] Attempting to initialize the jax distributed system... I0424 20:35:39.388246 138912888584000 distributed.py:149] Starting JAX distributed service on [::]:8482 I0424 20:35:39.390564 138912888584000 distributed.py:172] Connecting to JAX distributed service on mt-08-checkpoint-async--vdhzk-slice-job-0-0.mt-08-checkpoint-async--vdhzk:8482 I0424 20:35:40.496970 138912888584000 max_utils.py:284] Jax distributed system initialized! I0424 20:35:46.734771 138912888584000 max_utils.py:800] System Information: Jax Version: 0.9.2 I0424 20:35:46.734876 138912888584000 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0424 20:35:46.734916 138912888584000 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 I0424 20:35:46.734960 138912888584000 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0424 20:35:47.431584 138912888584000 maxtext_utils.py:1565] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0424 20:35:47.431896 138912888584000 checkpointing.py:677] Setting up checkpoint logger... I0424 20:35:47.431967 138912888584000 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True I0424 20:35:47.432026 138912888584000 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0424 20:35:47.432420 138912888584000 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 0x7e5675b50fb0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0424 20:35:48.708714 138912888584000 checkpointing.py:265] Enabling policy for fixed interval checkpointing. I0424 20:35:48.708950 138912888584000 checkpoint_manager.py:708] [process=5][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e41785113a0>}, handler_registry=None I0424 20:35:48.709242 138912888584000 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e41785113a0>` 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`. I0424 20:35:48.709310 138912888584000 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e41785148f0>` 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`. I0424 20:35:48.709350 138912888584000 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 0x7e41785113a0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e41785113a0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e41785148f0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e41785148f0>}). I0424 20:35:48.709757 138912888584000 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0424 20:35:48.709844 138912888584000 async_checkpointer.py:192] [process=5][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7e41307e3560> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0424 20:35:51.052211 138791440336640 checkpoint.py:228] Read Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1777062785702659665, 'commit_timestamp_nsecs': 1777062830851778051, 'custom_metadata': {}} from gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_08_checkpoint_async_true/checkpoints/9/_CHECKPOINT_METADATA I0424 20:35:51.304041 138791448729344 checkpoint_manager.py:1871] Missing metrics for step 5 I0424 20:35:51.735939 138912888584000 checkpoint_manager.py:1812] Found 3 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_08_checkpoint_async_true/checkpoints I0424 20:35:52.376247 138912888584000 checkpoint_manager.py:929] [process=5][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_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_08_checkpoint_async_true/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7e4178514830> I0424 20:35:52.376416 138912888584000 checkpointing.py:301] Checkpoint manager created! I0424 20:35:53.307010 138912888584000 nnx_wrappers.py:453] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0424 20:35:53.307125 138912888584000 nnx_wrappers.py:453] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0424 20:35:53.690425 138912888584000 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0424 20:35:53.690514 138912888584000 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0424 20:35:53.707185 138912888584000 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0424 20:35:53.707242 138912888584000 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0424 20:35:53.730735 138912888584000 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0424 20:35:53.730803 138912888584000 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 20:35:53.747459 138912888584000 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0424 20:35:53.747522 138912888584000 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 20:35:53.764404 138912888584000 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0424 20:35:53.764464 138912888584000 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 20:35:53.789719 138912888584000 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0424 20:35:53.789791 138912888584000 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 20:35:53.811872 138912888584000 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0424 20:35:53.811940 138912888584000 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0424 20:35:54.024374 138912888584000 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint I0424 20:35:54.024479 138912888584000 checkpointing.py:581] restoring from this run's directory step 9 I0424 20:35:54.272642 138912888584000 event_tracking.py:70] [process=5] [sync] Started load checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_08_checkpoint_async_true/checkpoints/9. I0424 20:35:54.521903 138912888584000 checkpointer.py:307] Restoring checkpoint from gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_08_checkpoint_async_true/checkpoints/9. I0424 20:35:54.522346 138912888584000 event_tracking.py:125] [process=5] [sync] Finished blocking load in 0.25 seconds. Continuing load @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_08_checkpoint_async_true/checkpoints/9. I0424 20:35:56.749749 1454 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0424 20:36:03.189094 138912888584000 jax_array_handlers.py:843] [process=5] /jax/orbax/read/worker/io/requested throughput: 245.170 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 6.44562292098999 s) (per-host) I0424 20:36:03.193922 138912888584000 base_pytree_checkpoint_handler.py:130] [process=5] /jax/checkpoint/read/gbytes_per_sec: 231.388 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 6.839553356170654 s) (per-host) I0424 20:36:04.279018 138912888584000 event_tracking.py:138] [process=5] [sync] Finished load in 10.01 seconds @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_08_checkpoint_async_true/checkpoints/9 I0424 20:36:04.279180 138912888584000 standard_logger.py:34] {'step': 9, 'event_type': 'restore', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_08_checkpoint_async_true/checkpoints', 'checkpointer_start_time': 1777062954.2725425, 'checkpointer_duration_secs': 10.006602048873901, 'checkpoint_manager_start_time': 1777062954.0247421, 'checkpoint_manager_duration_secs': 10.254403829574585} fsdp: 32 I0424 20:36:04.703691 138912888584000 maxtext_utils.py:1668] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0424 20:36:04.703826 138912888584000 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) I0424 20:36:04.703878 138912888584000 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) I0424 20:36:04.703938 138912888584000 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') I0424 20:36:04.703998 138912888584000 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) I0424 20:36:04.704040 138912888584000 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) I0424 20:36:04.704093 138912888584000 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) I0424 20:36:04.704144 138912888584000 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') I0424 20:36:04.704185 138912888584000 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) I0424 20:36:04.704221 138912888584000 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) I0424 20:36:04.704267 138912888584000 maxtext_utils.py:1668] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', None) I0424 20:36:04.704313 138912888584000 maxtext_utils.py:1668] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0424 20:36:05.202676 138912888584000 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0424 20:36:05.202771 138912888584000 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0424 20:36:05.218261 138912888584000 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0424 20:36:05.218322 138912888584000 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0424 20:36:16.306665 138912888584000 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. I0424 20:36:16.307412 138912888584000 metric_logger.py:301] number parameters: 1.104 billion I0424 20:36:28.185944 138912888584000 checkpointing.py:772] Waiting for step 10 to finish before checkpoint... I0424 20:36:28.341626 138912888584000 checkpointing.py:776] Waited 0.1556682586669922 seconds for step 10 to finish before starting checkpointing. I0424 20:36:28.344347 138912888584000 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0424 20:36:28.346313 138912888584000 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 10 I0424 20:36:28.347734 138912888584000 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_08_checkpoint_async_true/checkpoints/10. I0424 20:36:28.676706 138912888584000 signaling_client.py:364] Using JaxDistributedSignalingClient I0424 20:36:28.677685 138912888584000 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0424 20:36:28.677742 138912888584000 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 I0424 20:36:28.953442 138912888584000 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.276825s I0424 20:36:28.953614 138912888584000 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 5.491 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2809181213378906 s) (per-host) I0424 20:36:28.953693 138912888584000 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.281006s (batch_requests_ready=0.002394s, total_serialization_initiated=0.278516s, others=0.000096s) I0424 20:36:28.953796 138912888584000 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.285080s (all_items=0.000018s, per_item={'items': '0.00001788'}, temp_paths=0.285062) I0424 20:36:28.954549 138912888584000 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.61 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_08_checkpoint_async_true/checkpoints/10. I0424 20:36:28.954843 138790861534976 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-24 20:56:28.954812 I0424 20:36:28.960381 138912888584000 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=10] Starting CheckpointManager Save Finalize thread=save_finalize I0424 20:36:28.960689 138789762615040 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0424 20:36:28.960840 138912888584000 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_08_checkpoint_async_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777062988.3443286, 'wait_for_prev_duration_secs': 6.29425048828125e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777062988.3463545, 'checkpointer_blocking_duration_secs': 0.608644962310791, 'get_old_steps_start_time': 1777062988.955027, 'get_old_steps_duration_secs': 3.2901763916015625e-05, 'checkpoint_manager_blocking_start_time': 1777062988.3421621, 'checkpoint_manager_blocking_duration_secs': 0.6186444759368896} I0424 20:36:28.960945 138912888584000 checkpointing.py:408] Started an asynchronous checkpoint save for step 10 I0424 20:36:28.960993 138912888584000 max_utils.py:750] Memstats: After params initialized: I0424 20:36:28.961045 138912888584000 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_18(process=5,(2,4,0,0)) I0424 20:36:28.961080 138912888584000 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_19(process=5,(3,4,0,0)) I0424 20:36:28.961107 138912888584000 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_22(process=5,(2,5,0,0)) I0424 20:36:28.961132 138912888584000 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_23(process=5,(3,5,0,0)) I0424 20:36:29.274837 138912888584000 metric_logger.py:196] completed step: 10, seconds: 11.878, TFLOP/s/device: 1.144, Tokens/s/device: 172.413, total_weights: 65536, loss: 6.833, lm_loss: 6.833, perplexity: 927.869 I0424 20:36:29.888009 138912888584000 metric_logger.py:196] completed step: 11, seconds: 1.087, TFLOP/s/device: 12.496, Tokens/s/device: 1883.480, total_weights: 65536, loss: 6.527, lm_loss: 6.527, perplexity: 683.659 I0424 20:36:30.035836 138912888584000 metric_logger.py:196] completed step: 12, seconds: 0.466, TFLOP/s/device: 29.181, Tokens/s/device: 4398.446, total_weights: 65536, loss: 6.265, lm_loss: 6.265, perplexity: 526.068 I0424 20:36:30.183318 138912888584000 metric_logger.py:196] completed step: 13, seconds: 0.153, TFLOP/s/device: 88.528, Tokens/s/device: 13343.845, total_weights: 65536, loss: 6.045, lm_loss: 6.045, perplexity: 422.001 I0424 20:36:30.187597 138912888584000 checkpointing.py:772] Waiting for step 15 to finish before checkpoint... I0424 20:36:30.477380 138912888584000 checkpointing.py:776] Waited 0.2897462844848633 seconds for step 15 to finish before starting checkpointing. I0424 20:36:30.480280 138912888584000 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=10][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0424 20:36:34.728270 138789787793152 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_08_checkpoint_async_true/checkpoints/10/items/array_metadatas/process_5 I0424 20:37:11.165015 138790861534976 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 37.174 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.49228501319885 s) (per-host) I0424 20:37:11.165136 138790861534976 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.210172s. I0424 20:37:19.720947 138790861534976 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 50.765967s. I0424 20:37:19.721213 138789762615040 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0424 20:37:19.721343 138789762615040 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0424 20:37:19.721393 138789762615040 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=10] CheckpointManager Save Finalize is syncing with other hosts... I0424 20:37:19.722861 138789762615040 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=10] CheckpointManager Save Finalize is done on all hosts. I0424 20:37:19.723038 138912888584000 checkpoint_manager.py:2032] [process=5][thread=MainThread][step=10][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=10. W0424 20:37:19.723166 138912888584000 checkpoint_manager.py:1452] Waiting for previous save to complete took 49.242886 seconds. If this number is high, consider checkpointing less frequently. I0424 20:37:19.725131 138912888584000 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 15 I0424 20:37:19.727543 138912888584000 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_08_checkpoint_async_true/checkpoints/15. I0424 20:37:20.014552 138912888584000 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0424 20:37:20.014647 138912888584000 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 I0424 20:37:20.041683 138912888584000 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.028886s I0424 20:37:20.041855 138912888584000 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 47.341 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.03258466720581055 s) (per-host) I0424 20:37:20.041907 138912888584000 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.032646s (batch_requests_ready=0.002002s, total_serialization_initiated=0.030576s, others=0.000069s) I0424 20:37:20.042003 138912888584000 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.037595s (all_items=0.000014s, per_item={'items': '0.00001359'}, temp_paths=0.037581) I0424 20:37:20.042711 138912888584000 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.32 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_08_checkpoint_async_true/checkpoints/15. I0424 20:37:20.042982 138789762615040 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-24 20:57:20.042951 I0424 20:37:20.052234 138912888584000 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=15] Starting CheckpointManager Save Finalize thread=save_finalize I0424 20:37:20.052532 138787631916800 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0424 20:37:20.052706 138912888584000 standard_logger.py:34] {'step': 15, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_08_checkpoint_async_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777062990.4802527, 'wait_for_prev_duration_secs': 49.24288606643677, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777063039.72517, 'checkpointer_blocking_duration_secs': 0.3179500102996826, 'get_old_steps_start_time': 1777063040.0431437, 'get_old_steps_duration_secs': 3.24249267578125e-05, 'checkpoint_manager_blocking_start_time': 1777062990.4779809, 'checkpoint_manager_blocking_duration_secs': 49.57468914985657} I0424 20:37:20.052819 138912888584000 checkpointing.py:408] Started an asynchronous checkpoint save for step 15 I0424 20:37:20.053572 138912888584000 metric_logger.py:196] completed step: 14, seconds: 0.148, TFLOP/s/device: 91.886, Tokens/s/device: 13850.097, total_weights: 65536, loss: 5.864, lm_loss: 5.864, perplexity: 352.193 I0424 20:37:20.059696 138912888584000 metric_logger.py:196] completed step: 15, seconds: 0.147, TFLOP/s/device: 92.276, Tokens/s/device: 13908.886, total_weights: 65536, loss: 5.719, lm_loss: 5.719, perplexity: 304.661 I0424 20:37:25.405992 138789787793152 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_08_checkpoint_async_true/checkpoints/15/items/array_metadatas/process_5 I0424 20:37:40.843751 138912888584000 metric_logger.py:196] completed step: 16, seconds: 49.871, TFLOP/s/device: 0.272, Tokens/s/device: 41.066, total_weights: 65536, loss: 5.605, lm_loss: 5.605, perplexity: 271.872 I0424 20:37:40.991155 138912888584000 metric_logger.py:196] completed step: 17, seconds: 20.638, TFLOP/s/device: 0.658, Tokens/s/device: 99.234, total_weights: 65536, loss: 5.517, lm_loss: 5.517, perplexity: 248.975 I0424 20:37:41.138623 138912888584000 metric_logger.py:196] completed step: 18, seconds: 0.152, TFLOP/s/device: 89.324, Tokens/s/device: 13463.852, total_weights: 65536, loss: 5.448, lm_loss: 5.448, perplexity: 232.333 I0424 20:37:41.285402 138912888584000 checkpointing.py:772] Waiting for step 19 to finish before checkpoint... I0424 20:37:41.286110 138912888584000 checkpointing.py:776] Waited 0.0007293224334716797 seconds for step 19 to finish before starting checkpointing. I0424 20:37:41.288186 138912888584000 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=15][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0424 20:38:02.485018 138789762615040 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 37.188 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.47570872306824 s) (per-host) I0424 20:38:02.485139 138789762615040 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.442050s. I0424 20:38:10.476989 138789762615040 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 50.433883s. I0424 20:38:10.477317 138787631916800 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0424 20:38:10.477448 138787631916800 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0424 20:38:10.477500 138787631916800 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=15] CheckpointManager Save Finalize is syncing with other hosts... I0424 20:38:10.479680 138787631916800 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=15] CheckpointManager Save Finalize is done on all hosts. I0424 20:38:10.479856 138912888584000 checkpoint_manager.py:2032] [process=5][thread=MainThread][step=15][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=15. W0424 20:38:10.479980 138912888584000 checkpoint_manager.py:1452] Waiting for previous save to complete took 29.191803 seconds. If this number is high, consider checkpointing less frequently. I0424 20:38:10.481513 138912888584000 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 19 I0424 20:38:10.483583 138912888584000 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_08_checkpoint_async_true/checkpoints/19. I0424 20:38:10.775562 138912888584000 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0424 20:38:10.775666 138912888584000 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 I0424 20:38:10.801416 138912888584000 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.026732s I0424 20:38:10.801586 138912888584000 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 50.625 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.030470848083496094 s) (per-host) I0424 20:38:10.801638 138912888584000 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.030533s (batch_requests_ready=0.001870s, total_serialization_initiated=0.028597s, others=0.000067s) I0424 20:38:10.801751 138912888584000 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.034759s (all_items=0.000011s, per_item={'items': '0.00001121'}, temp_paths=0.034747) I0424 20:38:10.802408 138912888584000 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.32 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_08_checkpoint_async_true/checkpoints/19. I0424 20:38:10.802729 138785987733248 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-24 20:58:10.802691 I0424 20:38:10.805627 138912888584000 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=19] Starting CheckpointManager Save Finalize thread=save_finalize I0424 20:38:10.805930 138787631916800 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0424 20:38:10.806108 138912888584000 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_08_checkpoint_async_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777063061.2881556, 'wait_for_prev_duration_secs': 29.191802740097046, 'time_between_consecutive_saves_sec': 21.565253973007202, 'checkpointer_blocking_start_time': 1777063090.4815514, 'checkpointer_blocking_duration_secs': 0.32132959365844727, 'get_old_steps_start_time': 1777063090.802896, 'get_old_steps_duration_secs': 2.3603439331054688e-05, 'checkpoint_manager_blocking_start_time': 1777063061.2863526, 'checkpoint_manager_blocking_duration_secs': 29.519725561141968} I0424 20:38:10.806213 138912888584000 checkpointing.py:408] Started an asynchronous checkpoint save for step 19 I0424 20:38:10.806255 138912888584000 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=19][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0424 20:38:15.807404 138789787793152 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_08_checkpoint_async_true/checkpoints/19/items/array_metadatas/process_5 I0424 20:38:52.837704 138785987733248 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 37.550 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.066537857055664 s) (per-host) I0424 20:38:52.837830 138785987733248 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.034977s. I0424 20:39:04.752479 138785987733248 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 53.949613s. I0424 20:39:04.752834 138787631916800 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0424 20:39:04.752983 138787631916800 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0424 20:39:04.753035 138787631916800 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=19] CheckpointManager Save Finalize is syncing with other hosts... I0424 20:39:04.754328 138787631916800 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=19] CheckpointManager Save Finalize is done on all hosts. I0424 20:39:04.754508 138912888584000 checkpoint_manager.py:2032] [process=5][thread=MainThread][step=19][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=19. I0424 20:39:04.754675 138912888584000 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0424 20:39:04.755614 138912888584000 metric_logger.py:196] completed step: 19, seconds: 0.148, TFLOP/s/device: 92.034, Tokens/s/device: 13872.425, 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: Fri Apr 24 20:39:15 UTC 2026 EXIT_CODE=0