XPK Start: Thu Apr 23 08:14:13 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. 2026-04-23 08:14:38.597828: 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) I0423 08:14:38.809405 133686820521792 max_utils.py:273] Attempting to initialize the jax distributed system... I0423 08:14:47.851976 133686820521792 distributed.py:149] Starting JAX distributed service on [::]:8482 I0423 08:14:47.854274 133686820521792 distributed.py:172] Connecting to JAX distributed service on mt-14-async-ckpt-false--aitud-slice-job-0-0.mt-14-async-ckpt-false--aitud:8482 I0423 08:14:49.097989 133686820521792 max_utils.py:284] Jax distributed system initialized! I0423 08:14:55.216436 133686820521792 max_utils.py:800] System Information: Jax Version: 0.9.2 I0423 08:14:55.216543 133686820521792 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0423 08:14:55.216583 133686820521792 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 I0423 08:14:55.216617 133686820521792 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0423 08:14:55.907593 133686820521792 maxtext_utils.py:1604] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0423 08:14:55.907874 133686820521792 checkpointing.py:677] Setting up checkpoint logger... I0423 08:14:55.907943 133686820521792 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True I0423 08:14:55.907987 133686820521792 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0423 08:14:55.908334 133686820521792 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 0x7995ac16c050>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0423 08:14:58.436509 133686820521792 checkpointing.py:265] Enabling policy for fixed interval checkpointing. I0423 08:14:58.436762 133686820521792 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 0x79816c441e50>}, handler_registry=None I0423 08:14:58.437014 133686820521792 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x79816c441e50>` 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`. I0423 08:14:58.437064 133686820521792 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x79816c445790>` 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`. I0423 08:14:58.437103 133686820521792 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 0x79816c441e50>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x79816c441e50>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x79816c445790>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x79816c445790>}). I0423 08:14:58.437428 133686820521792 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0423 08:14:59.892882 133565446592256 checkpoint.py:228] Read Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776931857136185757, 'commit_timestamp_nsecs': 1776931904962880446, 'custom_metadata': {}} from gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_14_async_ckpt_false/checkpoints/5/_CHECKPOINT_METADATA I0423 08:15:00.534789 133564892968704 checkpoint_manager.py:1871] Missing metrics for step 9 I0423 08:15:00.566667 133686820521792 checkpoint_manager.py:1812] Found 3 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_14_async_ckpt_false/checkpoints I0423 08:15:01.449668 133686820521792 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_main_20260423_071538/linen_xpk_main_20260423_071538_14_async_ckpt_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x79819c1f95b0> I0423 08:15:01.449846 133686820521792 checkpointing.py:301] Checkpoint manager created! I0423 08:15:02.380436 133686820521792 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0423 08:15:02.380555 133686820521792 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 08:15:02.758067 133686820521792 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn'). I0423 08:15:02.758162 133686820521792 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 08:15:02.774595 133686820521792 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn'). I0423 08:15:02.774655 133686820521792 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 08:15:02.798326 133686820521792 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 08:15:02.798396 133686820521792 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 08:15:02.814811 133686820521792 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 08:15:02.814873 133686820521792 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 08:15:02.831756 133686820521792 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 08:15:02.831817 133686820521792 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 08:15:02.856421 133686820521792 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch_attn', 'activation_length_attn', 'activation_heads', 'activation_kv'). I0423 08:15:02.856497 133686820521792 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 08:15:02.878304 133686820521792 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0423 08:15:02.878369 133686820521792 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0423 08:15:03.091097 133686820521792 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint I0423 08:15:03.091208 133686820521792 checkpointing.py:581] restoring from this run's directory step 9 I0423 08:15:03.351833 133686820521792 event_tracking.py:70] [process=3] [sync] Started load checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_14_async_ckpt_false/checkpoints/9. I0423 08:15:03.601894 133686820521792 checkpointer.py:307] Restoring checkpoint from gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_14_async_ckpt_false/checkpoints/9. I0423 08:15:03.602338 133686820521792 event_tracking.py:125] [process=3] [sync] Finished blocking load in 0.25 seconds. Continuing load @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_14_async_ckpt_false/checkpoints/9. I0423 08:15:05.431843 1457 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0423 08:15:11.794669 133686820521792 jax_array_handlers.py:843] [process=3] /jax/orbax/read/worker/io/requested throughput: 248.123 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 6.368921279907227 s) (per-host) I0423 08:15:11.799250 133686820521792 base_pytree_checkpoint_handler.py:130] [process=3] /jax/checkpoint/read/gbytes_per_sec: 234.007 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 6.763013601303101 s) (per-host) I0423 08:15:12.774565 133686820521792 event_tracking.py:138] [process=3] [sync] Finished load in 9.42 seconds @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_14_async_ckpt_false/checkpoints/9 I0423 08:15:12.774726 133686820521792 standard_logger.py:34] {'step': 9, 'event_type': 'restore', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_14_async_ckpt_false/checkpoints', 'checkpointer_start_time': 1776932103.3517525, 'checkpointer_duration_secs': 9.4229416847229, 'checkpoint_manager_start_time': 1776932103.0914583, 'checkpoint_manager_duration_secs': 9.683237791061401} fsdp: 32 I0423 08:15:13.195223 133686820521792 maxtext_utils.py:1707] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0423 08:15:13.195352 133686820521792 maxtext_utils.py:1707] params/params/decoder/layers/mlp/wi_0/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0423 08:15:13.195406 133686820521792 maxtext_utils.py:1707] params/params/decoder/layers/mlp/wi_1/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0423 08:15:13.195462 133686820521792 maxtext_utils.py:1707] params/params/decoder/layers/mlp/wo/kernel Shape: float32[7168,16,2048] Logical: P('mlp', 'layers', 'embed') Physical: (None, None, 'fsdp') I0423 08:15:13.195534 133686820521792 maxtext_utils.py:1707] params/params/decoder/layers/post_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0423 08:15:13.195592 133686820521792 maxtext_utils.py:1707] params/params/decoder/layers/pre_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0423 08:15:13.195672 133686820521792 maxtext_utils.py:1707] 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) I0423 08:15:13.195758 133686820521792 maxtext_utils.py:1707] 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') I0423 08:15:13.195816 133686820521792 maxtext_utils.py:1707] 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) I0423 08:15:13.195873 133686820521792 maxtext_utils.py:1707] 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) I0423 08:15:13.195962 133686820521792 maxtext_utils.py:1707] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', None) I0423 08:15:13.196042 133686820521792 maxtext_utils.py:1707] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0423 08:15:13.680237 133686820521792 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0423 08:15:13.680331 133686820521792 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0423 08:15:13.696004 133686820521792 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0423 08:15:13.696064 133686820521792 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0423 08:15:24.594718 133686820521792 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. I0423 08:15:24.595478 133686820521792 metric_logger.py:301] number parameters: 1.104 billion I0423 08:15:36.366875 133686820521792 checkpointing.py:772] Waiting for step 10 to finish before checkpoint... I0423 08:15:36.520112 133686820521792 checkpointing.py:776] Waited 0.1532125473022461 seconds for step 10 to finish before starting checkpointing. I0423 08:15:36.522473 133686820521792 checkpoint_manager.py:2009] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 08:15:36.524452 133686820521792 checkpoint_manager.py:1512] [process=3] Saving checkpoint at step 10 I0423 08:15:36.525880 133686820521792 event_tracking.py:70] [process=3] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_14_async_ckpt_false/checkpoints/10. I0423 08:15:39.456489 133686820521792 signaling_client.py:364] Using JaxDistributedSignalingClient I0423 08:15:39.457780 133686820521792 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. I0423 08:15:41.280457 133686820521792 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0423 08:15:41.280561 133686820521792 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 I0423 08:15:41.571645 133686820521792 base_pytree_checkpoint_handler.py:154] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.292192s I0423 08:15:41.571836 133686820521792 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/blocking_gbytes_per_sec: 5.201 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2966008186340332 s) (per-host) I0423 08:15:41.571895 133686820521792 base_pytree_checkpoint_handler.py:768] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.296670s (batch_requests_ready=0.002494s, total_serialization_initiated=0.294099s, others=0.000078s) I0423 08:15:41.572009 133686820521792 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 2.115619s (all_items=0.000031s, per_item={'items': '0.00003099'}, temp_paths=2.115588) I0423 08:15:41.572058 133686820521792 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. I0423 08:15:41.572097 133686820521792 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. I0423 08:15:44.050178 133564356097792 array_metadata_store.py:203] [process=3][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_14_async_ckpt_false/checkpoints/10/items/array_metadatas/process_3 I0423 08:16:20.681674 133686820521792 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/gbytes_per_sec: 40.085 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 39.40642166137695 s) (per-host) I0423 08:16:25.075782 133686820521792 event_tracking.py:125] [process=3] [sync] Finished blocking save in 48.55 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_14_async_ckpt_false/checkpoints/10. I0423 08:16:29.266112 133686820521792 event_tracking.py:138] [process=3] [sync] Finished save in 52.74 seconds @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_14_async_ckpt_false/checkpoints/10 I0423 08:16:29.268783 133686820521792 checkpoint_manager.py:2137] [process=3][thread=MainThread][step=10] CheckpointManager Save Finalize is syncing with other hosts... I0423 08:16:29.270337 133686820521792 checkpoint_manager.py:2146] [process=3][thread=MainThread][step=10] CheckpointManager Save Finalize is done on all hosts. I0423 08:16:29.270386 133686820521792 checkpoint_manager.py:1581] [process=3][thread=MainThread][step=10] Finished synchronous save. I0423 08:16:29.270439 133686820521792 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1776932136.5224552, 'wait_for_prev_duration_secs': 6.127357482910156e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776932136.5244968, 'checkpointer_blocking_duration_secs': 52.74173021316528, 'get_old_steps_start_time': 1776932189.266248, 'get_old_steps_duration_secs': 2.6941299438476562e-05, 'checkpoint_manager_blocking_start_time': 1776932136.5206347, 'checkpoint_manager_blocking_duration_secs': 52.7497775554657} I0423 08:16:29.270530 133686820521792 checkpointing.py:410] Saved a checkpoint at step 10. I0423 08:16:29.270573 133686820521792 max_utils.py:750] Memstats: After params initialized: I0423 08:16:29.270617 133686820521792 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_10(process=3,(2,2,0,0)) I0423 08:16:29.270646 133686820521792 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_11(process=3,(3,2,0,0)) I0423 08:16:29.270671 133686820521792 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_14(process=3,(2,3,0,0)) I0423 08:16:29.270701 133686820521792 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_15(process=3,(3,3,0,0)) I0423 08:16:29.580037 133686820521792 metric_logger.py:196] completed step: 10, seconds: 11.771, TFLOP/s/device: 1.154, Tokens/s/device: 173.983, total_weights: 65536, loss: 6.833, lm_loss: 6.833, perplexity: 927.869 I0423 08:16:29.773917 133686820521792 metric_logger.py:196] completed step: 11, seconds: 53.212, TFLOP/s/device: 0.255, Tokens/s/device: 38.488, total_weights: 65536, loss: 6.527, lm_loss: 6.527, perplexity: 683.659 I0423 08:16:29.921336 133686820521792 metric_logger.py:196] completed step: 12, seconds: 0.047, TFLOP/s/device: 291.500, Tokens/s/device: 43938.126, total_weights: 65536, loss: 6.265, lm_loss: 6.265, perplexity: 526.068 I0423 08:16:30.068723 133686820521792 metric_logger.py:196] completed step: 13, seconds: 0.153, TFLOP/s/device: 88.677, Tokens/s/device: 13366.314, total_weights: 65536, loss: 6.045, lm_loss: 6.045, perplexity: 422.001 I0423 08:16:30.073164 133686820521792 checkpointing.py:772] Waiting for step 15 to finish before checkpoint... I0423 08:16:30.363774 133686820521792 checkpointing.py:776] Waited 0.29057812690734863 seconds for step 15 to finish before starting checkpointing. I0423 08:16:30.367295 133686820521792 checkpoint_manager.py:2009] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 08:16:30.369015 133686820521792 checkpoint_manager.py:1512] [process=3] Saving checkpoint at step 15 I0423 08:16:30.370863 133686820521792 event_tracking.py:70] [process=3] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_14_async_ckpt_false/checkpoints/15. I0423 08:16:33.233191 133686820521792 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. I0423 08:16:35.030971 133686820521792 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0423 08:16:35.031069 133686820521792 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 I0423 08:16:35.059102 133686820521792 base_pytree_checkpoint_handler.py:154] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.029363s I0423 08:16:35.059244 133686820521792 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/blocking_gbytes_per_sec: 46.495 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.03317689895629883 s) (per-host) I0423 08:16:35.059297 133686820521792 base_pytree_checkpoint_handler.py:768] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.033239s (batch_requests_ready=0.001969s, total_serialization_initiated=0.031202s, others=0.000068s) I0423 08:16:35.066889 133686820521792 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.834954s (all_items=0.000026s, per_item={'items': '0.00002575'}, temp_paths=1.834928) I0423 08:16:35.066972 133686820521792 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. I0423 08:16:35.067016 133686820521792 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. I0423 08:16:37.189250 133561085982464 array_metadata_store.py:203] [process=3][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_14_async_ckpt_false/checkpoints/15/items/array_metadatas/process_3 I0423 08:17:14.128662 133686820521792 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/gbytes_per_sec: 40.396 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 39.10255527496338 s) (per-host) I0423 08:17:18.142396 133686820521792 event_tracking.py:125] [process=3] [sync] Finished blocking save in 47.77 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_14_async_ckpt_false/checkpoints/15. I0423 08:17:22.317800 133686820521792 event_tracking.py:138] [process=3] [sync] Finished save in 51.95 seconds @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_14_async_ckpt_false/checkpoints/15 I0423 08:17:22.319774 133686820521792 checkpoint_manager.py:2137] [process=3][thread=MainThread][step=15] CheckpointManager Save Finalize is syncing with other hosts... I0423 08:17:22.321243 133686820521792 checkpoint_manager.py:2146] [process=3][thread=MainThread][step=15] CheckpointManager Save Finalize is done on all hosts. I0423 08:17:22.321294 133686820521792 checkpoint_manager.py:1581] [process=3][thread=MainThread][step=15] Finished synchronous save. I0423 08:17:22.321344 133686820521792 standard_logger.py:34] {'step': 15, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1776932190.3672738, 'wait_for_prev_duration_secs': 6.29425048828125e-05, 'time_between_consecutive_saves_sec': 1.096898078918457, 'checkpointer_blocking_start_time': 1776932190.3690524, 'checkpointer_blocking_duration_secs': 51.94886493682861, 'get_old_steps_start_time': 1776932242.3179696, 'get_old_steps_duration_secs': 2.5987625122070312e-05, 'checkpoint_manager_blocking_start_time': 1776932190.3644216, 'checkpoint_manager_blocking_duration_secs': 51.95689821243286} I0423 08:17:22.321440 133686820521792 checkpointing.py:410] Saved a checkpoint at step 15. I0423 08:17:22.322276 133686820521792 metric_logger.py:196] completed step: 14, seconds: 0.148, TFLOP/s/device: 92.069, Tokens/s/device: 13877.595, total_weights: 65536, loss: 5.864, lm_loss: 5.864, perplexity: 352.193 I0423 08:17:22.328459 133686820521792 metric_logger.py:196] completed step: 15, seconds: 0.147, TFLOP/s/device: 92.309, Tokens/s/device: 13913.800, total_weights: 65536, loss: 5.719, lm_loss: 5.719, perplexity: 304.661 I0423 08:17:43.678667 133686820521792 metric_logger.py:196] completed step: 16, seconds: 52.254, TFLOP/s/device: 0.260, Tokens/s/device: 39.193, total_weights: 65536, loss: 5.605, lm_loss: 5.605, perplexity: 271.872 I0423 08:17:43.825818 133686820521792 metric_logger.py:196] completed step: 17, seconds: 21.204, TFLOP/s/device: 0.641, Tokens/s/device: 96.586, total_weights: 65536, loss: 5.517, lm_loss: 5.517, perplexity: 248.975 I0423 08:17:43.973453 133686820521792 metric_logger.py:196] completed step: 18, seconds: 0.153, TFLOP/s/device: 89.091, Tokens/s/device: 13428.804, total_weights: 65536, loss: 5.448, lm_loss: 5.448, perplexity: 232.333 I0423 08:17:44.120101 133686820521792 checkpointing.py:772] Waiting for step 19 to finish before checkpoint... I0423 08:17:44.120758 133686820521792 checkpointing.py:776] Waited 0.00067901611328125 seconds for step 19 to finish before starting checkpointing. I0423 08:17:44.122884 133686820521792 checkpoint_manager.py:2009] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 08:17:44.124692 133686820521792 checkpoint_manager.py:1512] [process=3] Saving checkpoint at step 19 I0423 08:17:44.126106 133686820521792 event_tracking.py:70] [process=3] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_14_async_ckpt_false/checkpoints/19. I0423 08:17:46.642899 133686820521792 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. I0423 08:17:48.771987 133686820521792 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0423 08:17:48.772092 133686820521792 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 I0423 08:17:48.798909 133686820521792 base_pytree_checkpoint_handler.py:154] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.028152s I0423 08:17:48.799090 133686820521792 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/blocking_gbytes_per_sec: 48.192 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.032009124755859375 s) (per-host) I0423 08:17:48.799165 133686820521792 base_pytree_checkpoint_handler.py:768] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.032090s (batch_requests_ready=0.001967s, total_serialization_initiated=0.030035s, others=0.000088s) I0423 08:17:48.806354 133686820521792 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 2.164703s (all_items=0.000036s, per_item={'items': '0.00003600'}, temp_paths=2.164667) I0423 08:17:48.806432 133686820521792 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. I0423 08:17:48.806484 133686820521792 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. I0423 08:17:51.236174 133564356097792 array_metadata_store.py:203] [process=3][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_14_async_ckpt_false/checkpoints/19/items/array_metadatas/process_3 I0423 08:18:27.349051 133686820521792 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/gbytes_per_sec: 40.941 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 38.58193349838257 s) (per-host) I0423 08:18:32.381807 133686820521792 event_tracking.py:125] [process=3] [sync] Finished blocking save in 48.26 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_14_async_ckpt_false/checkpoints/19. I0423 08:18:37.122635 133686820521792 event_tracking.py:138] [process=3] [sync] Finished save in 53.00 seconds @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_14_async_ckpt_false/checkpoints/19 I0423 08:18:37.124759 133686820521792 checkpoint_manager.py:2137] [process=3][thread=MainThread][step=19] CheckpointManager Save Finalize is syncing with other hosts... I0423 08:18:37.126500 133686820521792 checkpoint_manager.py:2146] [process=3][thread=MainThread][step=19] CheckpointManager Save Finalize is done on all hosts. I0423 08:18:37.126551 133686820521792 checkpoint_manager.py:1581] [process=3][thread=MainThread][step=19] Finished synchronous save. I0423 08:18:37.126600 133686820521792 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1776932264.1228664, 'wait_for_prev_duration_secs': 6.842613220214844e-05, 'time_between_consecutive_saves_sec': 21.801583290100098, 'checkpointer_blocking_start_time': 1776932264.1247303, 'checkpointer_blocking_duration_secs': 52.99803876876831, 'get_old_steps_start_time': 1776932317.1227832, 'get_old_steps_duration_secs': 1.9788742065429688e-05, 'checkpoint_manager_blocking_start_time': 1776932264.1210086, 'checkpoint_manager_blocking_duration_secs': 53.005568742752075} I0423 08:18:37.126688 133686820521792 checkpointing.py:410] Saved a checkpoint at step 19. I0423 08:18:37.126737 133686820521792 checkpoint_manager.py:2009] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 08:18:37.126774 133686820521792 checkpoint_manager.py:2009] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 08:18:37.127428 133686820521792 metric_logger.py:196] completed step: 19, seconds: 0.147, TFLOP/s/device: 92.342, Tokens/s/device: 13918.811, 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: Thu Apr 23 08:18:49 UTC 2026 EXIT_CODE=0