XPK Start: Fri Apr 24 20:57:41 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 20:58:06.240720: 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 20:58:06.452428 133384376502080 max_utils.py:273] Attempting to initialize the jax distributed system... I0424 20:58:15.492710 133384376502080 distributed.py:149] Starting JAX distributed service on [::]:8482 I0424 20:58:15.495122 133384376502080 distributed.py:172] Connecting to JAX distributed service on mt-14-async-ckpt-false--8g0vd-slice-job-0-0.mt-14-async-ckpt-false--8g0vd:8482 I0424 20:58:16.745649 133384376502080 max_utils.py:284] Jax distributed system initialized! I0424 20:58:22.926895 133384376502080 max_utils.py:800] System Information: Jax Version: 0.9.2 I0424 20:58:22.927020 133384376502080 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0424 20:58:22.927061 133384376502080 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 20:58:22.927097 133384376502080 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0424 20:58:23.622887 133384376502080 maxtext_utils.py:1565] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0424 20:58:23.623188 133384376502080 checkpointing.py:677] Setting up checkpoint logger... I0424 20:58:23.623247 133384376502080 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True I0424 20:58:23.623290 133384376502080 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0424 20:58:23.623658 133384376502080 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 0x794f5cf140e0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0424 20:58:24.935449 133384376502080 checkpointing.py:265] Enabling policy for fixed interval checkpointing. I0424 20:58:24.935693 133384376502080 checkpoint_manager.py:708] [process=3][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x793b48185550>}, handler_registry=None I0424 20:58:24.935951 133384376502080 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x793b48185550>` 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 20:58:24.936002 133384376502080 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x793b48188710>` 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 20:58:24.936039 133384376502080 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 0x793b48185550>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x793b48185550>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x793b48188710>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x793b48188710>}). I0424 20:58:24.936363 133384376502080 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0424 20:58:26.382308 133263146338048 checkpoint.py:228] Read Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1777064067033701737, 'commit_timestamp_nsecs': 1777064113889499071, 'custom_metadata': {}} from gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_14_async_ckpt_false/checkpoints/5/_CHECKPOINT_METADATA I0424 20:58:26.629708 133263146338048 checkpoint_manager.py:1871] Missing metrics for step 5 I0424 20:58:26.647600 133384376502080 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_14_async_ckpt_false/checkpoints I0424 20:58:27.039641 133384376502080 checkpoint_manager.py:929] [process=3][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=False, 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_14_async_ckpt_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x793b48188e90> I0424 20:58:27.039818 133384376502080 checkpointing.py:301] Checkpoint manager created! I0424 20:58:27.974176 133384376502080 nnx_wrappers.py:453] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0424 20:58:27.974294 133384376502080 nnx_wrappers.py:453] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0424 20:58:28.354542 133384376502080 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0424 20:58:28.354633 133384376502080 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0424 20:58:28.371136 133384376502080 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0424 20:58:28.371203 133384376502080 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0424 20:58:28.394858 133384376502080 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 20:58:28.394936 133384376502080 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 20:58:28.411537 133384376502080 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 20:58:28.411602 133384376502080 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 20:58:28.428118 133384376502080 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 20:58:28.428182 133384376502080 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 20:58:28.453013 133384376502080 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0424 20:58:28.453082 133384376502080 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 20:58:28.474449 133384376502080 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0424 20:58:28.474519 133384376502080 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0424 20:58:28.684587 133384376502080 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint I0424 20:58:28.684698 133384376502080 checkpointing.py:581] restoring from this run's directory step 9 I0424 20:58:28.916822 133384376502080 event_tracking.py:70] [process=3] [sync] Started load checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_14_async_ckpt_false/checkpoints/9. I0424 20:58:29.163863 133384376502080 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_14_async_ckpt_false/checkpoints/9. I0424 20:58:29.164301 133384376502080 event_tracking.py:125] [process=3] [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_14_async_ckpt_false/checkpoints/9. I0424 20:58:30.600514 1450 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0424 20:58:37.075953 133384376502080 jax_array_handlers.py:843] [process=3] /jax/orbax/read/worker/io/requested throughput: 243.829 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 6.4810791015625 s) (per-host) I0424 20:58:37.082137 133384376502080 base_pytree_checkpoint_handler.py:130] [process=3] /jax/checkpoint/read/gbytes_per_sec: 228.235 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 6.934055328369141 s) (per-host) I0424 20:58:37.934808 133384376502080 event_tracking.py:138] [process=3] [sync] Finished load in 9.02 seconds @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_14_async_ckpt_false/checkpoints/9 I0424 20:58:37.935003 133384376502080 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_14_async_ckpt_false/checkpoints', 'checkpointer_start_time': 1777064308.9167416, 'checkpointer_duration_secs': 9.018230199813843, 'checkpoint_manager_start_time': 1777064308.6849904, 'checkpoint_manager_duration_secs': 9.249983549118042} fsdp: 32 I0424 20:58:38.360754 133384376502080 maxtext_utils.py:1668] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0424 20:58:38.360888 133384376502080 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 20:58:38.360956 133384376502080 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 20:58:38.361016 133384376502080 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 20:58:38.361459 133384376502080 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 20:58:38.361648 133384376502080 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 20:58:38.361755 133384376502080 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 20:58:38.361825 133384376502080 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 20:58:38.361873 133384376502080 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 20:58:38.361914 133384376502080 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 20:58:38.361994 133384376502080 maxtext_utils.py:1668] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', None) I0424 20:58:38.362049 133384376502080 maxtext_utils.py:1668] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0424 20:58:38.857119 133384376502080 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0424 20:58:38.857214 133384376502080 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0424 20:58:38.872648 133384376502080 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0424 20:58:38.872710 133384376502080 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0424 20:58:49.900260 133384376502080 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 20:58:49.901027 133384376502080 metric_logger.py:301] number parameters: 1.104 billion I0424 20:59:01.253915 133384376502080 checkpointing.py:772] Waiting for step 10 to finish before checkpoint... I0424 20:59:01.437352 133384376502080 checkpointing.py:776] Waited 0.18341541290283203 seconds for step 10 to finish before starting checkpointing. I0424 20:59:01.439733 133384376502080 checkpoint_manager.py:2009] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0424 20:59:01.441539 133384376502080 checkpoint_manager.py:1512] [process=3] Saving checkpoint at step 10 I0424 20:59:01.442998 133384376502080 event_tracking.py:70] [process=3] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_14_async_ckpt_false/checkpoints/10. I0424 20:59:04.616171 133384376502080 signaling_client.py:364] Using JaxDistributedSignalingClient I0424 20:59:04.617496 133384376502080 future.py:372] [process=3][thread=MainThread][operation_id=1] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture. I0424 20:59:06.249164 133384376502080 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0424 20:59:06.249265 133384376502080 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 20:59:06.526624 133384376502080 base_pytree_checkpoint_handler.py:154] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.278665s I0424 20:59:06.526807 133384376502080 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/blocking_gbytes_per_sec: 5.455 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2827870845794678 s) (per-host) I0424 20:59:06.526871 133384376502080 base_pytree_checkpoint_handler.py:768] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.282858s (batch_requests_ready=0.002324s, total_serialization_initiated=0.280455s, others=0.000079s) I0424 20:59:06.527032 133384376502080 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.910941s (all_items=0.000036s, per_item={'items': '0.00003576'}, temp_paths=1.910905) I0424 20:59:06.527111 133384376502080 future.py:372] [process=3][thread=MainThread][operation_id=1] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture. I0424 20:59:06.527170 133384376502080 future.py:372] [process=3][thread=MainThread][operation_id=1] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture. I0424 20:59:08.370224 133262567536384 array_metadata_store.py:203] [process=3][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_14_async_ckpt_false/checkpoints/10/items/array_metadatas/process_3 I0424 20:59:44.694888 133384376502080 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/gbytes_per_sec: 41.081 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 38.45081424713135 s) (per-host) I0424 20:59:48.547014 133384376502080 event_tracking.py:125] [process=3] [sync] Finished blocking save in 47.11 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_14_async_ckpt_false/checkpoints/10. I0424 20:59:52.393362 133384376502080 event_tracking.py:138] [process=3] [sync] Finished save in 50.95 seconds @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_14_async_ckpt_false/checkpoints/10 I0424 20:59:52.395528 133384376502080 checkpoint_manager.py:2137] [process=3][thread=MainThread][step=10] CheckpointManager Save Finalize is syncing with other hosts... I0424 20:59:52.397176 133384376502080 checkpoint_manager.py:2146] [process=3][thread=MainThread][step=10] CheckpointManager Save Finalize is done on all hosts. I0424 20:59:52.397227 133384376502080 checkpoint_manager.py:1581] [process=3][thread=MainThread][step=10] Finished synchronous save. I0424 20:59:52.397279 133384376502080 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_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1777064341.439715, 'wait_for_prev_duration_secs': 6.318092346191406e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777064341.4415789, 'checkpointer_blocking_duration_secs': 50.95191478729248, 'get_old_steps_start_time': 1777064392.3935137, 'get_old_steps_duration_secs': 2.6941299438476562e-05, 'checkpoint_manager_blocking_start_time': 1777064341.4378908, 'checkpoint_manager_blocking_duration_secs': 50.959362506866455} I0424 20:59:52.397365 133384376502080 checkpointing.py:410] Saved a checkpoint at step 10. I0424 20:59:52.397408 133384376502080 max_utils.py:750] Memstats: After params initialized: I0424 20:59:52.397461 133384376502080 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_10(process=3,(2,2,0,0)) I0424 20:59:52.397494 133384376502080 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_11(process=3,(3,2,0,0)) I0424 20:59:52.397521 133384376502080 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_14(process=3,(2,3,0,0)) I0424 20:59:52.397544 133384376502080 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_15(process=3,(3,3,0,0)) I0424 20:59:52.709394 133384376502080 metric_logger.py:196] completed step: 10, seconds: 11.353, TFLOP/s/device: 1.197, Tokens/s/device: 180.396, total_weights: 65536, loss: 6.833, lm_loss: 6.833, perplexity: 927.869 I0424 20:59:52.881810 133384376502080 metric_logger.py:196] completed step: 11, seconds: 51.454, TFLOP/s/device: 0.264, Tokens/s/device: 39.803, total_weights: 65536, loss: 6.527, lm_loss: 6.527, perplexity: 683.659 I0424 20:59:53.029634 133384376502080 metric_logger.py:196] completed step: 12, seconds: 0.025, TFLOP/s/device: 538.787, Tokens/s/device: 81211.833, total_weights: 65536, loss: 6.265, lm_loss: 6.265, perplexity: 526.068 I0424 20:59:53.176895 133384376502080 metric_logger.py:196] completed step: 13, seconds: 0.153, TFLOP/s/device: 88.534, Tokens/s/device: 13344.802, total_weights: 65536, loss: 6.045, lm_loss: 6.045, perplexity: 422.001 I0424 20:59:53.181532 133384376502080 checkpointing.py:772] Waiting for step 15 to finish before checkpoint... I0424 20:59:53.470915 133384376502080 checkpointing.py:776] Waited 0.28934621810913086 seconds for step 15 to finish before starting checkpointing. I0424 20:59:53.474012 133384376502080 checkpoint_manager.py:2009] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0424 20:59:53.475820 133384376502080 checkpoint_manager.py:1512] [process=3] Saving checkpoint at step 15 I0424 20:59:53.477662 133384376502080 event_tracking.py:70] [process=3] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_14_async_ckpt_false/checkpoints/15. I0424 20:59:55.949429 133384376502080 future.py:372] [process=3][thread=MainThread][operation_id=2] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture. I0424 20:59:57.514297 133384376502080 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0424 20:59:57.514397 133384376502080 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 20:59:57.541952 133384376502080 base_pytree_checkpoint_handler.py:154] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.028726s I0424 20:59:57.542121 133384376502080 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/blocking_gbytes_per_sec: 47.385 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.032553911209106445 s) (per-host) I0424 20:59:57.542180 133384376502080 base_pytree_checkpoint_handler.py:768] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.032622s (batch_requests_ready=0.001792s, total_serialization_initiated=0.030755s, others=0.000075s) I0424 20:59:57.542279 133384376502080 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.594166s (all_items=0.000035s, per_item={'items': '0.00003529'}, temp_paths=1.594131) I0424 20:59:57.542320 133384376502080 future.py:372] [process=3][thread=MainThread][operation_id=2] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture. I0424 20:59:57.542359 133384376502080 future.py:372] [process=3][thread=MainThread][operation_id=2] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture. I0424 21:00:00.055263 133262567536384 array_metadata_store.py:203] [process=3][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_14_async_ckpt_false/checkpoints/15/items/array_metadatas/process_3 I0424 21:00:36.527868 133384376502080 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/gbytes_per_sec: 40.484 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 39.01824188232422 s) (per-host) I0424 21:00:41.143804 133384376502080 event_tracking.py:125] [process=3] [sync] Finished blocking save in 47.67 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_14_async_ckpt_false/checkpoints/15. I0424 21:00:44.636878 133384376502080 event_tracking.py:138] [process=3] [sync] Finished save in 51.16 seconds @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_14_async_ckpt_false/checkpoints/15 I0424 21:00:44.638779 133384376502080 checkpoint_manager.py:2137] [process=3][thread=MainThread][step=15] CheckpointManager Save Finalize is syncing with other hosts... I0424 21:00:44.640789 133384376502080 checkpoint_manager.py:2146] [process=3][thread=MainThread][step=15] CheckpointManager Save Finalize is done on all hosts. I0424 21:00:44.640841 133384376502080 checkpoint_manager.py:1581] [process=3][thread=MainThread][step=15] Finished synchronous save. I0424 21:00:44.640890 133384376502080 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_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1777064393.4739912, 'wait_for_prev_duration_secs': 6.29425048828125e-05, 'time_between_consecutive_saves_sec': 1.0767748355865479, 'checkpointer_blocking_start_time': 1777064393.4758584, 'checkpointer_blocking_duration_secs': 51.1611762046814, 'get_old_steps_start_time': 1777064444.6370566, 'get_old_steps_duration_secs': 2.6464462280273438e-05, 'checkpoint_manager_blocking_start_time': 1777064393.4715648, 'checkpoint_manager_blocking_duration_secs': 51.16930174827576} I0424 21:00:44.640990 133384376502080 checkpointing.py:410] Saved a checkpoint at step 15. I0424 21:00:44.641784 133384376502080 metric_logger.py:196] completed step: 14, seconds: 0.148, TFLOP/s/device: 91.968, Tokens/s/device: 13862.472, total_weights: 65536, loss: 5.864, lm_loss: 5.864, perplexity: 352.193 I0424 21:00:44.647582 133384376502080 metric_logger.py:196] completed step: 15, seconds: 0.147, TFLOP/s/device: 92.244, Tokens/s/device: 13904.070, total_weights: 65536, loss: 5.719, lm_loss: 5.719, perplexity: 304.661 I0424 21:01:05.847050 133384376502080 metric_logger.py:196] completed step: 16, seconds: 51.465, TFLOP/s/device: 0.264, Tokens/s/device: 39.794, total_weights: 65536, loss: 5.605, lm_loss: 5.605, perplexity: 271.872 I0424 21:01:05.994687 133384376502080 metric_logger.py:196] completed step: 17, seconds: 21.053, TFLOP/s/device: 0.645, Tokens/s/device: 97.277, total_weights: 65536, loss: 5.517, lm_loss: 5.517, perplexity: 248.975 I0424 21:01:06.142130 133384376502080 metric_logger.py:196] completed step: 18, seconds: 0.152, TFLOP/s/device: 89.280, Tokens/s/device: 13457.305, total_weights: 65536, loss: 5.448, lm_loss: 5.448, perplexity: 232.333 I0424 21:01:06.288985 133384376502080 checkpointing.py:772] Waiting for step 19 to finish before checkpoint... I0424 21:01:06.289690 133384376502080 checkpointing.py:776] Waited 0.0007596015930175781 seconds for step 19 to finish before starting checkpointing. I0424 21:01:06.291728 133384376502080 checkpoint_manager.py:2009] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0424 21:01:06.293665 133384376502080 checkpoint_manager.py:1512] [process=3] Saving checkpoint at step 19 I0424 21:01:06.294971 133384376502080 event_tracking.py:70] [process=3] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_14_async_ckpt_false/checkpoints/19. I0424 21:01:09.024428 133384376502080 future.py:372] [process=3][thread=MainThread][operation_id=3] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture. I0424 21:01:10.401122 133384376502080 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0424 21:01:10.401221 133384376502080 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 21:01:10.428865 133384376502080 base_pytree_checkpoint_handler.py:154] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.029011s I0424 21:01:10.429059 133384376502080 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/blocking_gbytes_per_sec: 47.181 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.03269457817077637 s) (per-host) I0424 21:01:10.429114 133384376502080 base_pytree_checkpoint_handler.py:768] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.032760s (batch_requests_ready=0.001785s, total_serialization_initiated=0.030905s, others=0.000070s) I0424 21:01:10.429219 133384376502080 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.406096s (all_items=0.000024s, per_item={'items': '0.00002408'}, temp_paths=1.406072) I0424 21:01:10.429259 133384376502080 future.py:372] [process=3][thread=MainThread][operation_id=3] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture. I0424 21:01:10.429300 133384376502080 future.py:372] [process=3][thread=MainThread][operation_id=3] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture. I0424 21:01:12.490105 133262567536384 array_metadata_store.py:203] [process=3][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_14_async_ckpt_false/checkpoints/19/items/array_metadatas/process_3 I0424 21:01:48.752736 133384376502080 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/gbytes_per_sec: 41.182 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 38.35632586479187 s) (per-host) I0424 21:01:54.214338 133384376502080 event_tracking.py:125] [process=3] [sync] Finished blocking save in 47.92 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_14_async_ckpt_false/checkpoints/19. I0424 21:01:57.917762 133384376502080 event_tracking.py:138] [process=3] [sync] Finished save in 51.62 seconds @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_14_async_ckpt_false/checkpoints/19 I0424 21:01:57.920353 133384376502080 checkpoint_manager.py:2137] [process=3][thread=MainThread][step=19] CheckpointManager Save Finalize is syncing with other hosts... I0424 21:01:57.921991 133384376502080 checkpoint_manager.py:2146] [process=3][thread=MainThread][step=19] CheckpointManager Save Finalize is done on all hosts. I0424 21:01:57.922044 133384376502080 checkpoint_manager.py:1581] [process=3][thread=MainThread][step=19] Finished synchronous save. I0424 21:01:57.922093 133384376502080 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_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1777064466.2917125, 'wait_for_prev_duration_secs': 5.793571472167969e-05, 'time_between_consecutive_saves_sec': 21.650882720947266, 'checkpointer_blocking_start_time': 1777064466.293702, 'checkpointer_blocking_duration_secs': 51.62417531013489, 'get_old_steps_start_time': 1777064517.9178913, 'get_old_steps_duration_secs': 2.002716064453125e-05, 'checkpoint_manager_blocking_start_time': 1777064466.2899153, 'checkpoint_manager_blocking_duration_secs': 51.63215446472168} I0424 21:01:57.922195 133384376502080 checkpointing.py:410] Saved a checkpoint at step 19. I0424 21:01:57.922247 133384376502080 checkpoint_manager.py:2009] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0424 21:01:57.922285 133384376502080 checkpoint_manager.py:2009] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0424 21:01:57.922980 133384376502080 metric_logger.py:196] completed step: 19, seconds: 0.148, TFLOP/s/device: 92.082, Tokens/s/device: 13879.664, 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 21:02:06 UTC 2026 EXIT_CODE=0