XPK Start: Sat Apr 25 20:59:14 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 20:59:39.341328: 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 20:59:39.559134 134225021404992 max_utils.py:273] Attempting to initialize the jax distributed system... I0425 20:59:48.600970 134225021404992 distributed.py:149] Starting JAX distributed service on [::]:8482 I0425 20:59:48.603407 134225021404992 distributed.py:172] Connecting to JAX distributed service on mt-14-async-ckpt-false--cvk9u-slice-job-0-0.mt-14-async-ckpt-false--cvk9u:8482 I0425 20:59:49.369335 134225021404992 max_utils.py:284] Jax distributed system initialized! I0425 20:59:55.444194 134225021404992 max_utils.py:800] System Information: Jax Version: 0.9.2 I0425 20:59:55.444302 134225021404992 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0425 20:59:55.444343 134225021404992 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 20:59:55.444378 134225021404992 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0425 20:59:56.140246 134225021404992 maxtext_utils.py:1565] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0425 20:59:56.140533 134225021404992 checkpointing.py:677] Setting up checkpoint logger... I0425 20:59:56.140594 134225021404992 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True I0425 20:59:56.140640 134225021404992 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0425 20:59:56.140987 134225021404992 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 0x7a1311b18ef0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0425 20:59:57.832758 134225021404992 checkpointing.py:265] Enabling policy for fixed interval checkpointing. I0425 20:59:57.833003 134225021404992 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 0x79feb4473a70>}, handler_registry=None I0425 20:59:57.833261 134225021404992 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x79feb4473a70>` 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 20:59:57.833313 134225021404992 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x79feb44758e0>` 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 20:59:57.833349 134225021404992 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 0x79feb4473a70>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x79feb4473a70>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x79feb44758e0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x79feb44758e0>}). I0425 20:59:57.833683 134225021404992 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0425 20:59:59.702364 134103600965376 checkpoint.py:228] Read Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1777150507208118641, 'commit_timestamp_nsecs': 1777150551064713164, 'custom_metadata': {}} from gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/0/_CHECKPOINT_METADATA I0425 20:59:59.946142 134103600965376 checkpoint_manager.py:1871] Missing metrics for step 0 I0425 21:00:00.180845 134225021404992 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_14_async_ckpt_false/checkpoints I0425 21:00:00.444229 134225021404992 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=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_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x79feb4472db0> I0425 21:00:00.444408 134225021404992 checkpointing.py:301] Checkpoint manager created! I0425 21:00:01.368747 134225021404992 nnx_wrappers.py:453] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0425 21:00:01.368866 134225021404992 nnx_wrappers.py:453] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0425 21:00:01.762180 134225021404992 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0425 21:00:01.762282 134225021404992 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0425 21:00:01.779229 134225021404992 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0425 21:00:01.779295 134225021404992 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0425 21:00:01.803421 134225021404992 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 21:00:01.803488 134225021404992 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 21:00:01.820457 134225021404992 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 21:00:01.820520 134225021404992 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 21:00:01.837506 134225021404992 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 21:00:01.837570 134225021404992 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 21:00:01.863224 134225021404992 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0425 21:00:01.863297 134225021404992 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 21:00:01.884846 134225021404992 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0425 21:00:01.884916 134225021404992 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0425 21:00:02.102526 134225021404992 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint I0425 21:00:02.102640 134225021404992 checkpointing.py:581] restoring from this run's directory step 9 I0425 21:00:02.355227 134225021404992 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_14_async_ckpt_false/checkpoints/9. I0425 21:00:02.601644 134225021404992 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_14_async_ckpt_false/checkpoints/9. I0425 21:00:02.602078 134225021404992 event_tracking.py:125] [process=6] [sync] Finished blocking load in 0.25 seconds. Continuing load @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/9. I0425 21:00:04.249997 1456 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0425 21:00:10.686643 134225021404992 jax_array_handlers.py:843] [process=6] /jax/orbax/read/worker/io/requested throughput: 245.286 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 6.44258713722229 s) (per-host) I0425 21:00:10.691935 134225021404992 base_pytree_checkpoint_handler.py:130] [process=6] /jax/checkpoint/read/gbytes_per_sec: 231.123 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 6.847394943237305 s) (per-host) I0425 21:00:11.852776 134225021404992 event_tracking.py:138] [process=6] [sync] Finished load in 9.50 seconds @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/9 I0425 21:00:11.852934 134225021404992 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_14_async_ckpt_false/checkpoints', 'checkpointer_start_time': 1777150802.3551452, 'checkpointer_duration_secs': 9.497756004333496, 'checkpoint_manager_start_time': 1777150802.10289, 'checkpoint_manager_duration_secs': 9.750012636184692} fsdp: 32 I0425 21:00:12.280622 134225021404992 maxtext_utils.py:1668] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0425 21:00:12.280747 134225021404992 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 21:00:12.280800 134225021404992 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 21:00:12.280857 134225021404992 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 21:00:12.280912 134225021404992 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 21:00:12.280951 134225021404992 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 21:00:12.281004 134225021404992 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 21:00:12.281055 134225021404992 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 21:00:12.281106 134225021404992 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 21:00:12.281147 134225021404992 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 21:00:12.281195 134225021404992 maxtext_utils.py:1668] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', None) I0425 21:00:12.281242 134225021404992 maxtext_utils.py:1668] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0425 21:00:12.775359 134225021404992 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0425 21:00:12.775453 134225021404992 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0425 21:00:12.791359 134225021404992 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0425 21:00:12.791419 134225021404992 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0425 21:00:24.002365 134225021404992 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 21:00:24.003205 134225021404992 metric_logger.py:301] number parameters: 1.104 billion I0425 21:00:35.487599 134225021404992 checkpointing.py:772] Waiting for step 10 to finish before checkpoint... I0425 21:00:35.643734 134225021404992 checkpointing.py:776] Waited 0.15611648559570312 seconds for step 10 to finish before starting checkpointing. I0425 21:00:35.645980 134225021404992 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0425 21:00:35.647878 134225021404992 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 10 I0425 21:00:35.649257 134225021404992 event_tracking.py:70] [process=6] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/10. I0425 21:00:38.208979 134225021404992 signaling_client.py:364] Using JaxDistributedSignalingClient I0425 21:00:38.210449 134225021404992 future.py:372] [process=6][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. I0425 21:00:39.623412 134225021404992 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0425 21:00:39.623510 134225021404992 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 21:00:39.905418 134225021404992 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.283042s I0425 21:00:39.905615 134225021404992 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 5.371 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28720808029174805 s) (per-host) I0425 21:00:39.905673 134225021404992 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.287277s (batch_requests_ready=0.002352s, total_serialization_initiated=0.284842s, others=0.000083s) I0425 21:00:39.905775 134225021404992 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.696884s (all_items=0.000034s, per_item={'items': '0.00003409'}, temp_paths=1.696850) I0425 21:00:39.905822 134225021404992 future.py:372] [process=6][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. I0425 21:00:39.905864 134225021404992 future.py:372] [process=6][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. I0425 21:00:41.962961 134103005378304 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_14_async_ckpt_false/checkpoints/10/items/array_metadatas/process_6 I0425 21:01:19.361624 134225021404992 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 39.745 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 39.74317502975464 s) (per-host) I0425 21:01:24.692238 134225021404992 event_tracking.py:125] [process=6] [sync] Finished blocking save in 49.04 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/10. I0425 21:01:29.619309 134225021404992 event_tracking.py:138] [process=6] [sync] Finished save in 53.97 seconds @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/10 I0425 21:01:29.621629 134225021404992 checkpoint_manager.py:2137] [process=6][thread=MainThread][step=10] CheckpointManager Save Finalize is syncing with other hosts... I0425 21:01:29.623073 134225021404992 checkpoint_manager.py:2146] [process=6][thread=MainThread][step=10] CheckpointManager Save Finalize is done on all hosts. I0425 21:01:29.623136 134225021404992 checkpoint_manager.py:1581] [process=6][thread=MainThread][step=10] Finished synchronous save. I0425 21:01:29.623189 134225021404992 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_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1777150835.645962, 'wait_for_prev_duration_secs': 6.175041198730469e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777150835.6479166, 'checkpointer_blocking_duration_secs': 53.97151446342468, 'get_old_steps_start_time': 1777150889.619452, 'get_old_steps_duration_secs': 2.6226043701171875e-05, 'checkpoint_manager_blocking_start_time': 1777150835.6442668, 'checkpoint_manager_blocking_duration_secs': 53.97889566421509} I0425 21:01:29.623276 134225021404992 checkpointing.py:410] Saved a checkpoint at step 10. I0425 21:01:29.623320 134225021404992 max_utils.py:750] Memstats: After params initialized: I0425 21:01:29.623369 134225021404992 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0)) I0425 21:01:29.623400 134225021404992 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0)) I0425 21:01:29.623425 134225021404992 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0)) I0425 21:01:29.623446 134225021404992 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0)) I0425 21:01:29.933836 134225021404992 metric_logger.py:196] completed step: 10, seconds: 11.484, TFLOP/s/device: 1.183, Tokens/s/device: 178.331, total_weights: 65536, loss: 6.833, lm_loss: 6.833, perplexity: 927.869 I0425 21:01:30.123328 134225021404992 metric_logger.py:196] completed step: 11, seconds: 54.445, TFLOP/s/device: 0.250, Tokens/s/device: 37.616, total_weights: 65536, loss: 6.527, lm_loss: 6.527, perplexity: 683.659 I0425 21:01:30.270948 134225021404992 metric_logger.py:196] completed step: 12, seconds: 0.042, TFLOP/s/device: 321.323, Tokens/s/device: 48433.251, total_weights: 65536, loss: 6.265, lm_loss: 6.265, perplexity: 526.068 I0425 21:01:30.418486 134225021404992 metric_logger.py:196] completed step: 13, seconds: 0.154, TFLOP/s/device: 88.380, Tokens/s/device: 13321.538, total_weights: 65536, loss: 6.045, lm_loss: 6.045, perplexity: 422.001 I0425 21:01:30.423478 134225021404992 checkpointing.py:772] Waiting for step 15 to finish before checkpoint... I0425 21:01:30.712527 134225021404992 checkpointing.py:776] Waited 0.289013147354126 seconds for step 15 to finish before starting checkpointing. I0425 21:01:30.715493 134225021404992 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0425 21:01:30.717121 134225021404992 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 15 I0425 21:01:30.718940 134225021404992 event_tracking.py:70] [process=6] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/15. I0425 21:01:33.592566 134225021404992 future.py:372] [process=6][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. I0425 21:01:34.970386 134225021404992 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0425 21:01:34.970485 134225021404992 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 21:01:34.997630 134225021404992 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.028369s I0425 21:01:34.997811 134225021404992 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 47.825 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.03225445747375488 s) (per-host) I0425 21:01:34.997868 134225021404992 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.032322s (batch_requests_ready=0.001815s, total_serialization_initiated=0.030433s, others=0.000074s) I0425 21:01:34.997974 134225021404992 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.406678s (all_items=0.000026s, per_item={'items': '0.00002599'}, temp_paths=1.406652) I0425 21:01:34.998016 134225021404992 future.py:372] [process=6][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. I0425 21:01:34.998055 134225021404992 future.py:372] [process=6][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. I0425 21:01:37.912745 134103005378304 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_14_async_ckpt_false/checkpoints/15/items/array_metadatas/process_6 I0425 21:02:14.108590 134225021404992 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 40.355 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 39.14298057556152 s) (per-host) I0425 21:02:19.435531 134225021404992 event_tracking.py:125] [process=6] [sync] Finished blocking save in 48.72 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/15. I0425 21:02:23.490252 134225021404992 event_tracking.py:138] [process=6] [sync] Finished save in 52.77 seconds @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/15 I0425 21:02:23.492156 134225021404992 checkpoint_manager.py:2137] [process=6][thread=MainThread][step=15] CheckpointManager Save Finalize is syncing with other hosts... I0425 21:02:23.493766 134225021404992 checkpoint_manager.py:2146] [process=6][thread=MainThread][step=15] CheckpointManager Save Finalize is done on all hosts. I0425 21:02:23.493818 134225021404992 checkpoint_manager.py:1581] [process=6][thread=MainThread][step=15] Finished synchronous save. I0425 21:02:23.493869 134225021404992 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_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1777150890.715472, 'wait_for_prev_duration_secs': 6.389617919921875e-05, 'time_between_consecutive_saves_sec': 1.0923471450805664, 'checkpointer_blocking_start_time': 1777150890.7171583, 'checkpointer_blocking_duration_secs': 52.773212909698486, 'get_old_steps_start_time': 1777150943.4903922, 'get_old_steps_duration_secs': 2.5987625122070312e-05, 'checkpoint_manager_blocking_start_time': 1777150890.713154, 'checkpoint_manager_blocking_duration_secs': 52.78069019317627} I0425 21:02:23.493958 134225021404992 checkpointing.py:410] Saved a checkpoint at step 15. I0425 21:02:23.494781 134225021404992 metric_logger.py:196] completed step: 14, seconds: 0.148, TFLOP/s/device: 91.963, Tokens/s/device: 13861.721, total_weights: 65536, loss: 5.864, lm_loss: 5.864, perplexity: 352.193 I0425 21:02:23.500839 134225021404992 metric_logger.py:196] completed step: 15, seconds: 0.147, TFLOP/s/device: 92.159, Tokens/s/device: 13891.150, total_weights: 65536, loss: 5.719, lm_loss: 5.719, perplexity: 304.661 I0425 21:02:44.630048 134225021404992 metric_logger.py:196] completed step: 16, seconds: 53.076, TFLOP/s/device: 0.256, Tokens/s/device: 38.586, total_weights: 65536, loss: 5.605, lm_loss: 5.605, perplexity: 271.872 I0425 21:02:44.777489 134225021404992 metric_logger.py:196] completed step: 17, seconds: 20.983, TFLOP/s/device: 0.648, Tokens/s/device: 97.603, total_weights: 65536, loss: 5.517, lm_loss: 5.517, perplexity: 248.975 I0425 21:02:44.925015 134225021404992 metric_logger.py:196] completed step: 18, seconds: 0.153, TFLOP/s/device: 88.984, Tokens/s/device: 13412.709, total_weights: 65536, loss: 5.448, lm_loss: 5.448, perplexity: 232.333 I0425 21:02:45.071596 134225021404992 checkpointing.py:772] Waiting for step 19 to finish before checkpoint... I0425 21:02:45.072365 134225021404992 checkpointing.py:776] Waited 0.0007889270782470703 seconds for step 19 to finish before starting checkpointing. I0425 21:02:45.074395 134225021404992 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0425 21:02:45.076284 134225021404992 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 19 I0425 21:02:45.077745 134225021404992 event_tracking.py:70] [process=6] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/19. I0425 21:02:47.859803 134225021404992 future.py:372] [process=6][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. I0425 21:02:49.266358 134225021404992 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0425 21:02:49.266455 134225021404992 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 21:02:49.293175 134225021404992 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.027805s I0425 21:02:49.293326 134225021404992 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 48.948 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.031514644622802734 s) (per-host) I0425 21:02:49.293379 134225021404992 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.031576s (batch_requests_ready=0.001805s, total_serialization_initiated=0.029706s, others=0.000066s) I0425 21:02:49.293462 134225021404992 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.434856s (all_items=0.000027s, per_item={'items': '0.00002742'}, temp_paths=1.434829) I0425 21:02:49.293502 134225021404992 future.py:372] [process=6][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. I0425 21:02:49.293539 134225021404992 future.py:372] [process=6][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. I0425 21:02:51.405721 134103005378304 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_14_async_ckpt_false/checkpoints/19/items/array_metadatas/process_6 I0425 21:03:27.684902 134225021404992 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 41.111 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 38.42304992675781 s) (per-host) I0425 21:03:33.355774 134225021404992 event_tracking.py:125] [process=6] [sync] Finished blocking save in 48.28 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/19. I0425 21:03:38.580350 134225021404992 event_tracking.py:138] [process=6] [sync] Finished save in 53.50 seconds @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/19 I0425 21:03:38.582892 134225021404992 checkpoint_manager.py:2137] [process=6][thread=MainThread][step=19] CheckpointManager Save Finalize is syncing with other hosts... I0425 21:03:38.584690 134225021404992 checkpoint_manager.py:2146] [process=6][thread=MainThread][step=19] CheckpointManager Save Finalize is done on all hosts. I0425 21:03:38.584740 134225021404992 checkpoint_manager.py:1581] [process=6][thread=MainThread][step=19] Finished synchronous save. I0425 21:03:38.584789 134225021404992 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_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1777150965.0743783, 'wait_for_prev_duration_secs': 5.841255187988281e-05, 'time_between_consecutive_saves_sec': 21.5805721282959, 'checkpointer_blocking_start_time': 1777150965.076322, 'checkpointer_blocking_duration_secs': 53.504148721694946, 'get_old_steps_start_time': 1777151018.5804849, 'get_old_steps_duration_secs': 2.1696090698242188e-05, 'checkpoint_manager_blocking_start_time': 1777150965.072605, 'checkpoint_manager_blocking_duration_secs': 53.51216125488281} I0425 21:03:38.584875 134225021404992 checkpointing.py:410] Saved a checkpoint at step 19. I0425 21:03:38.584905 134225021404992 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0425 21:03:38.584936 134225021404992 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0425 21:03:38.585591 134225021404992 metric_logger.py:196] completed step: 19, seconds: 0.147, TFLOP/s/device: 92.273, Tokens/s/device: 13908.319, 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 21:03:49 UTC 2026 EXIT_CODE=0