XPK Start: Tue Apr 21 15:36:16 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. 2026-04-21 15:36:41.811259: 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) I0421 15:36:42.022430 136751070750528 max_utils.py:273] Attempting to initialize the jax distributed system... I0421 15:36:51.063516 136751070750528 distributed.py:149] Starting JAX distributed service on [::]:8482 I0421 15:36:51.066021 136751070750528 distributed.py:172] Connecting to JAX distributed service on mt-14-async-ckpt-false--2rdn3-slice-job-0-0.mt-14-async-ckpt-false--2rdn3:8482 I0421 15:36:52.370479 136751070750528 max_utils.py:284] Jax distributed system initialized! I0421 15:36:58.538907 136751070750528 max_utils.py:800] System Information: Jax Version: 0.9.2 I0421 15:36:58.539013 136751070750528 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0421 15:36:58.539051 136751070750528 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 I0421 15:36:58.539086 136751070750528 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0421 15:36:59.232514 136751070750528 maxtext_utils.py:1565] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0421 15:36:59.232811 136751070750528 checkpointing.py:677] Setting up checkpoint logger... I0421 15:36:59.232871 136751070750528 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True I0421 15:36:59.232914 136751070750528 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0421 15:36:59.233248 136751070750528 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 0x7c5f47f103e0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0421 15:37:00.541095 136751070750528 checkpointing.py:265] Enabling policy for fixed interval checkpointing. I0421 15:37:00.541329 136751070750528 checkpoint_manager.py:708] [process=7][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7c4abc7d56a0>}, handler_registry=None I0421 15:37:00.541570 136751070750528 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7c4abc7d56a0>` 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`. I0421 15:37:00.541619 136751070750528 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7c4abc7d8800>` 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`. I0421 15:37:00.541655 136751070750528 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 0x7c4abc7d56a0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7c4abc7d56a0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7c4abc7d8800>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7c4abc7d8800>}). I0421 15:37:00.542002 136751070750528 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0421 15:37:02.426874 136628798478080 checkpoint.py:228] Read Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776785654107887913, 'commit_timestamp_nsecs': 1776785702819160016, 'custom_metadata': {}} from gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_14_async_ckpt_false/checkpoints/9/_CHECKPOINT_METADATA I0421 15:37:02.674198 136628798478080 checkpoint_manager.py:1871] Missing metrics for step 9 I0421 15:37:03.127795 136751070750528 checkpoint_manager.py:1812] Found 3 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_14_async_ckpt_false/checkpoints I0421 15:37:03.553011 136751070750528 checkpoint_manager.py:929] [process=7][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_20260421_144122/linen_xpk_main_20260421_144122_14_async_ckpt_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7c4adc20b230> I0421 15:37:03.553186 136751070750528 checkpointing.py:301] Checkpoint manager created! I0421 15:37:04.500049 136751070750528 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0421 15:37:04.500170 136751070750528 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0421 15:37:04.883015 136751070750528 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0421 15:37:04.883110 136751070750528 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0421 15:37:04.899625 136751070750528 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0421 15:37:04.899684 136751070750528 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0421 15:37:04.923432 136751070750528 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0421 15:37:04.923499 136751070750528 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0421 15:37:04.940024 136751070750528 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0421 15:37:04.940086 136751070750528 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0421 15:37:04.956535 136751070750528 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0421 15:37:04.956597 136751070750528 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0421 15:37:04.981352 136751070750528 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0421 15:37:04.981426 136751070750528 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0421 15:37:05.002429 136751070750528 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0421 15:37:05.002495 136751070750528 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0421 15:37:05.214613 136751070750528 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint I0421 15:37:05.214727 136751070750528 checkpointing.py:581] restoring from this run's directory step 9 I0421 15:37:05.461954 136751070750528 event_tracking.py:70] [process=7] [sync] Started load checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_14_async_ckpt_false/checkpoints/9. I0421 15:37:06.135344 136751070750528 checkpointer.py:307] Restoring checkpoint from gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_14_async_ckpt_false/checkpoints/9. I0421 15:37:06.135817 136751070750528 event_tracking.py:125] [process=7] [sync] Finished blocking load in 0.67 seconds. Continuing load @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_14_async_ckpt_false/checkpoints/9. I0421 15:37:07.901778 1512 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0421 15:37:13.702478 136751070750528 jax_array_handlers.py:843] [process=7] /jax/orbax/read/worker/io/requested throughput: 272.150 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 5.806636333465576 s) (per-host) I0421 15:37:13.708600 136751070750528 base_pytree_checkpoint_handler.py:130] [process=7] /jax/checkpoint/read/gbytes_per_sec: 254.911 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 6.208411693572998 s) (per-host) I0421 15:37:14.248884 136751070750528 event_tracking.py:138] [process=7] [sync] Finished load in 8.79 seconds @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_14_async_ckpt_false/checkpoints/9 I0421 15:37:14.249046 136751070750528 standard_logger.py:34] {'step': 9, 'event_type': 'restore', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_14_async_ckpt_false/checkpoints', 'checkpointer_start_time': 1776785825.4618738, 'checkpointer_duration_secs': 8.787139654159546, 'checkpoint_manager_start_time': 1776785825.2149835, 'checkpoint_manager_duration_secs': 9.034032106399536} fsdp: 32 I0421 15:37:14.667011 136751070750528 maxtext_utils.py:1668] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0421 15:37:14.667138 136751070750528 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) I0421 15:37:14.667190 136751070750528 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) I0421 15:37:14.667245 136751070750528 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') I0421 15:37:14.667299 136751070750528 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) I0421 15:37:14.667337 136751070750528 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) I0421 15:37:14.667389 136751070750528 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) I0421 15:37:14.667440 136751070750528 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') I0421 15:37:14.667479 136751070750528 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) I0421 15:37:14.667515 136751070750528 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) I0421 15:37:14.667562 136751070750528 maxtext_utils.py:1668] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', None) I0421 15:37:14.667608 136751070750528 maxtext_utils.py:1668] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0421 15:37:15.166286 136751070750528 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0421 15:37:15.166378 136751070750528 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0421 15:37:15.181918 136751070750528 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0421 15:37:15.181982 136751070750528 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0421 15:37:26.281334 136751070750528 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. I0421 15:37:26.282145 136751070750528 metric_logger.py:301] number parameters: 1.104 billion I0421 15:37:37.620040 136751070750528 checkpointing.py:772] Waiting for step 10 to finish before checkpoint... I0421 15:37:37.773540 136751070750528 checkpointing.py:776] Waited 0.15347862243652344 seconds for step 10 to finish before starting checkpointing. I0421 15:37:37.776170 136751070750528 checkpoint_manager.py:2009] [process=7][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0421 15:37:37.778178 136751070750528 checkpoint_manager.py:1512] [process=7] Saving checkpoint at step 10 I0421 15:37:37.779528 136751070750528 event_tracking.py:70] [process=7] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_14_async_ckpt_false/checkpoints/10. I0421 15:37:40.609897 136751070750528 signaling_client.py:364] Using JaxDistributedSignalingClient I0421 15:37:40.611351 136751070750528 future.py:372] [process=7][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. I0421 15:37:42.020323 136751070750528 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0421 15:37:42.020420 136751070750528 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 I0421 15:37:42.299111 136751070750528 base_pytree_checkpoint_handler.py:154] [process=7][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.280064s I0421 15:37:42.299290 136751070750528 base_pytree_checkpoint_handler.py:130] [process=7] /jax/orbax/write/blocking_gbytes_per_sec: 5.428 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28418970108032227 s) (per-host) I0421 15:37:42.299348 136751070750528 base_pytree_checkpoint_handler.py:768] [process=7][thread=MainThread] Initiated Pytree async_save. Time taken: 0.284257s (batch_requests_ready=0.002328s, total_serialization_initiated=0.281853s, others=0.000076s) I0421 15:37:42.299443 136751070750528 composite_checkpoint_handler.py:715] [process=7][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.689640s (all_items=0.000036s, per_item={'items': '0.00003576'}, temp_paths=1.689604) I0421 15:37:42.299488 136751070750528 future.py:372] [process=7][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. I0421 15:37:42.299530 136751070750528 future.py:372] [process=7][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. I0421 15:37:44.352282 136628781692672 array_metadata_store.py:203] [process=7][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_14_async_ckpt_false/checkpoints/10/items/array_metadatas/process_7 I0421 15:38:20.840651 136751070750528 base_pytree_checkpoint_handler.py:130] [process=7] /jax/orbax/write/gbytes_per_sec: 40.685 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 38.825512647628784 s) (per-host) I0421 15:38:26.578982 136751070750528 event_tracking.py:125] [process=7] [sync] Finished blocking save in 48.80 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_14_async_ckpt_false/checkpoints/10. I0421 15:38:30.763034 136751070750528 event_tracking.py:138] [process=7] [sync] Finished save in 52.98 seconds @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_14_async_ckpt_false/checkpoints/10 I0421 15:38:30.765050 136751070750528 checkpoint_manager.py:2137] [process=7][thread=MainThread][step=10] CheckpointManager Save Finalize is syncing with other hosts... I0421 15:38:30.766634 136751070750528 checkpoint_manager.py:2146] [process=7][thread=MainThread][step=10] CheckpointManager Save Finalize is done on all hosts. I0421 15:38:30.766686 136751070750528 checkpoint_manager.py:1581] [process=7][thread=MainThread][step=10] Finished synchronous save. I0421 15:38:30.766749 136751070750528 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1776785857.7761488, 'wait_for_prev_duration_secs': 0.00010538101196289062, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776785857.778217, 'checkpointer_blocking_duration_secs': 52.98493552207947, 'get_old_steps_start_time': 1776785910.7631755, 'get_old_steps_duration_secs': 2.765655517578125e-05, 'checkpoint_manager_blocking_start_time': 1776785857.7742796, 'checkpoint_manager_blocking_duration_secs': 52.992433071136475} I0421 15:38:30.766843 136751070750528 checkpointing.py:410] Saved a checkpoint at step 10. I0421 15:38:30.766887 136751070750528 max_utils.py:750] Memstats: After params initialized: I0421 15:38:30.766933 136751070750528 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_26(process=7,(2,6,0,0)) I0421 15:38:30.766964 136751070750528 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_27(process=7,(3,6,0,0)) I0421 15:38:30.766990 136751070750528 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_30(process=7,(2,7,0,0)) I0421 15:38:30.767014 136751070750528 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_31(process=7,(3,7,0,0)) I0421 15:38:31.082630 136751070750528 metric_logger.py:196] completed step: 10, seconds: 11.338, TFLOP/s/device: 1.198, Tokens/s/device: 180.635, total_weights: 65536, loss: 6.833, lm_loss: 6.833, perplexity: 927.869 I0421 15:38:31.249968 136751070750528 metric_logger.py:196] completed step: 11, seconds: 53.461, TFLOP/s/device: 0.254, Tokens/s/device: 38.308, total_weights: 65536, loss: 6.527, lm_loss: 6.527, perplexity: 683.659 I0421 15:38:31.397475 136751070750528 metric_logger.py:196] completed step: 12, seconds: 0.020, TFLOP/s/device: 684.180, Tokens/s/device: 103127.046, total_weights: 65536, loss: 6.265, lm_loss: 6.265, perplexity: 526.068 I0421 15:38:31.544813 136751070750528 metric_logger.py:196] completed step: 13, seconds: 0.153, TFLOP/s/device: 88.540, Tokens/s/device: 13345.671, total_weights: 65536, loss: 6.045, lm_loss: 6.045, perplexity: 422.001 I0421 15:38:31.549257 136751070750528 checkpointing.py:772] Waiting for step 15 to finish before checkpoint... I0421 15:38:31.838984 136751070750528 checkpointing.py:776] Waited 0.2896919250488281 seconds for step 15 to finish before starting checkpointing. I0421 15:38:31.841971 136751070750528 checkpoint_manager.py:2009] [process=7][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0421 15:38:31.843804 136751070750528 checkpoint_manager.py:1512] [process=7] Saving checkpoint at step 15 I0421 15:38:31.845562 136751070750528 event_tracking.py:70] [process=7] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_14_async_ckpt_false/checkpoints/15. I0421 15:38:34.697651 136751070750528 future.py:372] [process=7][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. I0421 15:38:36.063988 136751070750528 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0421 15:38:36.064090 136751070750528 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 I0421 15:38:36.091963 136751070750528 base_pytree_checkpoint_handler.py:154] [process=7][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.029032s I0421 15:38:36.092165 136751070750528 base_pytree_checkpoint_handler.py:130] [process=7] /jax/orbax/write/blocking_gbytes_per_sec: 46.884 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.032901763916015625 s) (per-host) I0421 15:38:36.092238 136751070750528 base_pytree_checkpoint_handler.py:768] [process=7][thread=MainThread] Initiated Pytree async_save. Time taken: 0.032981s (batch_requests_ready=0.001778s, total_serialization_initiated=0.031113s, others=0.000090s) I0421 15:38:36.092371 136751070750528 composite_checkpoint_handler.py:715] [process=7][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.395848s (all_items=0.000025s, per_item={'items': '0.00002456'}, temp_paths=1.395824) I0421 15:38:36.092424 136751070750528 future.py:372] [process=7][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. I0421 15:38:36.092480 136751070750528 future.py:372] [process=7][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. I0421 15:38:38.563245 136623958247168 array_metadata_store.py:203] [process=7][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_14_async_ckpt_false/checkpoints/15/items/array_metadatas/process_7 I0421 15:39:14.382402 136751070750528 base_pytree_checkpoint_handler.py:130] [process=7] /jax/orbax/write/gbytes_per_sec: 41.218 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 38.32309818267822 s) (per-host) I0421 15:39:20.056919 136751070750528 event_tracking.py:125] [process=7] [sync] Finished blocking save in 48.21 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_14_async_ckpt_false/checkpoints/15. I0421 15:39:23.978612 136751070750528 event_tracking.py:138] [process=7] [sync] Finished save in 52.13 seconds @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_14_async_ckpt_false/checkpoints/15 I0421 15:39:23.980768 136751070750528 checkpoint_manager.py:2137] [process=7][thread=MainThread][step=15] CheckpointManager Save Finalize is syncing with other hosts... I0421 15:39:23.982232 136751070750528 checkpoint_manager.py:2146] [process=7][thread=MainThread][step=15] CheckpointManager Save Finalize is done on all hosts. I0421 15:39:23.982283 136751070750528 checkpoint_manager.py:1581] [process=7][thread=MainThread][step=15] Finished synchronous save. I0421 15:39:23.982335 136751070750528 standard_logger.py:34] {'step': 15, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1776785911.8419507, 'wait_for_prev_duration_secs': 6.532669067382812e-05, 'time_between_consecutive_saves_sec': 1.075275182723999, 'checkpointer_blocking_start_time': 1776785911.84389, 'checkpointer_blocking_duration_secs': 52.134838581085205, 'get_old_steps_start_time': 1776785963.9787867, 'get_old_steps_duration_secs': 2.6464462280273438e-05, 'checkpoint_manager_blocking_start_time': 1776785911.8395913, 'checkpoint_manager_blocking_duration_secs': 52.14271950721741} I0421 15:39:23.982420 136751070750528 checkpointing.py:410] Saved a checkpoint at step 15. I0421 15:39:23.983194 136751070750528 metric_logger.py:196] completed step: 14, seconds: 0.148, TFLOP/s/device: 92.103, Tokens/s/device: 13882.769, total_weights: 65536, loss: 5.864, lm_loss: 5.864, perplexity: 352.193 I0421 15:39:23.989302 136751070750528 metric_logger.py:196] completed step: 15, seconds: 0.147, TFLOP/s/device: 92.262, Tokens/s/device: 13906.808, total_weights: 65536, loss: 5.719, lm_loss: 5.719, perplexity: 304.661 I0421 15:39:44.695531 136751070750528 metric_logger.py:196] completed step: 16, seconds: 52.439, TFLOP/s/device: 0.259, Tokens/s/device: 39.055, total_weights: 65536, loss: 5.605, lm_loss: 5.605, perplexity: 271.872 I0421 15:39:44.843118 136751070750528 metric_logger.py:196] completed step: 17, seconds: 20.560, TFLOP/s/device: 0.661, Tokens/s/device: 99.610, total_weights: 65536, loss: 5.517, lm_loss: 5.517, perplexity: 248.975 I0421 15:39:44.990332 136751070750528 metric_logger.py:196] completed step: 18, seconds: 0.152, TFLOP/s/device: 89.239, Tokens/s/device: 13451.118, total_weights: 65536, loss: 5.448, lm_loss: 5.448, perplexity: 232.333 I0421 15:39:45.137196 136751070750528 checkpointing.py:772] Waiting for step 19 to finish before checkpoint... I0421 15:39:45.137963 136751070750528 checkpointing.py:776] Waited 0.0007855892181396484 seconds for step 19 to finish before starting checkpointing. I0421 15:39:45.140078 136751070750528 checkpoint_manager.py:2009] [process=7][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0421 15:39:45.142084 136751070750528 checkpoint_manager.py:1512] [process=7] Saving checkpoint at step 19 I0421 15:39:45.143373 136751070750528 event_tracking.py:70] [process=7] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_14_async_ckpt_false/checkpoints/19. I0421 15:39:48.420214 136751070750528 future.py:372] [process=7][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. I0421 15:39:49.886152 136751070750528 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0421 15:39:49.886248 136751070750528 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 I0421 15:39:49.912518 136751070750528 base_pytree_checkpoint_handler.py:154] [process=7][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.027715s I0421 15:39:49.918139 136751070750528 base_pytree_checkpoint_handler.py:130] [process=7] /jax/orbax/write/blocking_gbytes_per_sec: 41.898 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.036817312240600586 s) (per-host) I0421 15:39:49.918216 136751070750528 base_pytree_checkpoint_handler.py:768] [process=7][thread=MainThread] Initiated Pytree async_save. Time taken: 0.036912s (batch_requests_ready=0.001759s, total_serialization_initiated=0.035047s, others=0.000106s) I0421 15:39:49.918314 136751070750528 composite_checkpoint_handler.py:715] [process=7][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.499457s (all_items=0.000027s, per_item={'items': '0.00002670'}, temp_paths=1.499430) I0421 15:39:49.918355 136751070750528 future.py:372] [process=7][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. I0421 15:39:49.918395 136751070750528 future.py:372] [process=7][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. I0421 15:39:52.246060 136628781692672 array_metadata_store.py:203] [process=7][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_14_async_ckpt_false/checkpoints/19/items/array_metadatas/process_7 I0421 15:40:28.373161 136751070750528 base_pytree_checkpoint_handler.py:130] [process=7] /jax/orbax/write/gbytes_per_sec: 41.037 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 38.49180817604065 s) (per-host) I0421 15:40:33.489673 136751070750528 event_tracking.py:125] [process=7] [sync] Finished blocking save in 48.35 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_14_async_ckpt_false/checkpoints/19. I0421 15:40:36.877761 136751070750528 event_tracking.py:138] [process=7] [sync] Finished save in 51.74 seconds @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_14_async_ckpt_false/checkpoints/19 I0421 15:40:36.879622 136751070750528 checkpoint_manager.py:2137] [process=7][thread=MainThread][step=19] CheckpointManager Save Finalize is syncing with other hosts... I0421 15:40:36.881488 136751070750528 checkpoint_manager.py:2146] [process=7][thread=MainThread][step=19] CheckpointManager Save Finalize is done on all hosts. I0421 15:40:36.881537 136751070750528 checkpoint_manager.py:1581] [process=7][thread=MainThread][step=19] Finished synchronous save. I0421 15:40:36.881586 136751070750528 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1776785985.1400616, 'wait_for_prev_duration_secs': 5.7220458984375e-05, 'time_between_consecutive_saves_sec': 21.15778946876526, 'checkpointer_blocking_start_time': 1776785985.142121, 'checkpointer_blocking_duration_secs': 51.73575711250305, 'get_old_steps_start_time': 1776786036.8778918, 'get_old_steps_duration_secs': 2.1457672119140625e-05, 'checkpoint_manager_blocking_start_time': 1776785985.1382098, 'checkpoint_manager_blocking_duration_secs': 51.74335432052612} I0421 15:40:36.881669 136751070750528 checkpointing.py:410] Saved a checkpoint at step 19. I0421 15:40:36.881700 136751070750528 checkpoint_manager.py:2009] [process=7][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0421 15:40:36.881730 136751070750528 checkpoint_manager.py:2009] [process=7][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0421 15:40:36.882467 136751070750528 metric_logger.py:196] completed step: 19, seconds: 0.148, TFLOP/s/device: 92.091, Tokens/s/device: 13880.981, 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: Tue Apr 21 15:40:47 UTC 2026 EXIT_CODE=0