XPK Start: Tue Apr 21 07:10:07 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 07:10:32.622383: 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 07:10:32.833480 139074759034688 max_utils.py:273] Attempting to initialize the jax distributed system... I0421 07:10:41.874867 139074759034688 distributed.py:149] Starting JAX distributed service on [::]:8482 I0421 07:10:41.877231 139074759034688 distributed.py:172] Connecting to JAX distributed service on mt-14-async-ckpt-false--71sqz-slice-job-0-0.mt-14-async-ckpt-false--71sqz:8482 I0421 07:10:42.845126 139074759034688 max_utils.py:284] Jax distributed system initialized! I0421 07:10:49.069020 139074759034688 max_utils.py:800] System Information: Jax Version: 0.9.2 I0421 07:10:49.069127 139074759034688 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0421 07:10:49.069167 139074759034688 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 07:10:49.069201 139074759034688 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0421 07:10:49.762611 139074759034688 maxtext_utils.py:1565] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0421 07:10:49.762902 139074759034688 checkpointing.py:677] Setting up checkpoint logger... I0421 07:10:49.762958 139074759034688 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True I0421 07:10:49.763003 139074759034688 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0421 07:10:49.763345 139074759034688 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 0x7e7c25d4dbb0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0421 07:10:51.433218 139074759034688 checkpointing.py:265] Enabling policy for fixed interval checkpointing. I0421 07:10:51.433456 139074759034688 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 0x7e66c81abc20>}, handler_registry=None I0421 07:10:51.433691 139074759034688 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e66c81abc20>` 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 07:10:51.433759 139074759034688 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e66e8545130>` 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 07:10:51.433797 139074759034688 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 0x7e66c81abc20>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e66c81abc20>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e66e8545130>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e66e8545130>}). I0421 07:10:51.434113 139074759034688 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0421 07:10:53.051169 138952249960192 checkpoint.py:228] Read Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776755285420397196, 'commit_timestamp_nsecs': 1776755333989394418, 'custom_metadata': {}} from gs://lance-maxtext/linen_ckpt_xpk_main_20260421_061359/linen_xpk_main_20260421_061359_14_async_ckpt_false/checkpoints/9/_CHECKPOINT_METADATA I0421 07:10:53.297976 138952249960192 checkpoint_manager.py:1871] Missing metrics for step 9 I0421 07:10:53.492088 139074759034688 checkpoint_manager.py:1812] Found 3 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260421_061359/linen_xpk_main_20260421_061359_14_async_ckpt_false/checkpoints I0421 07:10:54.618018 139074759034688 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_061359/linen_xpk_main_20260421_061359_14_async_ckpt_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7e66e85433b0> I0421 07:10:54.618190 139074759034688 checkpointing.py:301] Checkpoint manager created! I0421 07:10:55.549914 139074759034688 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0421 07:10:55.550037 139074759034688 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0421 07:10:55.928877 139074759034688 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0421 07:10:55.928973 139074759034688 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0421 07:10:55.945199 139074759034688 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0421 07:10:55.945259 139074759034688 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0421 07:10:55.968810 139074759034688 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 07:10:55.968876 139074759034688 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0421 07:10:55.985210 139074759034688 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 07:10:55.985271 139074759034688 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0421 07:10:56.001506 139074759034688 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 07:10:56.001568 139074759034688 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0421 07:10:56.026056 139074759034688 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0421 07:10:56.026126 139074759034688 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0421 07:10:56.047019 139074759034688 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0421 07:10:56.047088 139074759034688 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0421 07:10:56.257310 139074759034688 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint I0421 07:10:56.257417 139074759034688 checkpointing.py:581] restoring from this run's directory step 9 I0421 07:10:56.492581 139074759034688 event_tracking.py:70] [process=7] [sync] Started load checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_061359/linen_xpk_main_20260421_061359_14_async_ckpt_false/checkpoints/9. I0421 07:10:56.745528 139074759034688 checkpointer.py:307] Restoring checkpoint from gs://lance-maxtext/linen_ckpt_xpk_main_20260421_061359/linen_xpk_main_20260421_061359_14_async_ckpt_false/checkpoints/9. I0421 07:10:56.745972 139074759034688 event_tracking.py:125] [process=7] [sync] Finished blocking load in 0.25 seconds. Continuing load @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_061359/linen_xpk_main_20260421_061359_14_async_ckpt_false/checkpoints/9. I0421 07:10:58.268022 1469 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0421 07:11:04.516237 139074759034688 jax_array_handlers.py:843] [process=7] /jax/orbax/read/worker/io/requested throughput: 252.677 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 6.254119157791138 s) (per-host) I0421 07:11:04.521985 139074759034688 base_pytree_checkpoint_handler.py:130] [process=7] /jax/checkpoint/read/gbytes_per_sec: 237.975 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 6.650265693664551 s) (per-host) I0421 07:11:06.198951 139074759034688 event_tracking.py:138] [process=7] [sync] Finished load in 9.71 seconds @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_061359/linen_xpk_main_20260421_061359_14_async_ckpt_false/checkpoints/9 I0421 07:11:06.199108 139074759034688 standard_logger.py:34] {'step': 9, 'event_type': 'restore', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260421_061359/linen_xpk_main_20260421_061359_14_async_ckpt_false/checkpoints', 'checkpointer_start_time': 1776755456.4925025, 'checkpointer_duration_secs': 9.706574440002441, 'checkpoint_manager_start_time': 1776755456.257656, 'checkpoint_manager_duration_secs': 9.941423416137695} fsdp: 32 I0421 07:11:06.615603 139074759034688 maxtext_utils.py:1668] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0421 07:11:06.615764 139074759034688 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 07:11:06.615825 139074759034688 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 07:11:06.615881 139074759034688 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 07:11:06.615938 139074759034688 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 07:11:06.615977 139074759034688 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 07:11:06.616030 139074759034688 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 07:11:06.616082 139074759034688 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 07:11:06.616122 139074759034688 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 07:11:06.616160 139074759034688 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 07:11:06.616207 139074759034688 maxtext_utils.py:1668] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', None) I0421 07:11:06.616252 139074759034688 maxtext_utils.py:1668] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0421 07:11:07.097088 139074759034688 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0421 07:11:07.097182 139074759034688 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0421 07:11:07.112473 139074759034688 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0421 07:11:07.112531 139074759034688 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0421 07:11:18.109571 139074759034688 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 07:11:18.110360 139074759034688 metric_logger.py:301] number parameters: 1.104 billion I0421 07:11:29.323527 139074759034688 checkpointing.py:772] Waiting for step 10 to finish before checkpoint... I0421 07:11:29.550216 139074759034688 checkpointing.py:776] Waited 0.22666525840759277 seconds for step 10 to finish before starting checkpointing. I0421 07:11:29.552645 139074759034688 checkpoint_manager.py:2009] [process=7][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0421 07:11:29.554639 139074759034688 checkpoint_manager.py:1512] [process=7] Saving checkpoint at step 10 I0421 07:11:29.556275 139074759034688 event_tracking.py:70] [process=7] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_061359/linen_xpk_main_20260421_061359_14_async_ckpt_false/checkpoints/10. I0421 07:11:32.863811 139074759034688 signaling_client.py:364] Using JaxDistributedSignalingClient I0421 07:11:32.864921 139074759034688 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 07:11:34.235306 139074759034688 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0421 07:11:34.235404 139074759034688 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 07:11:34.515887 139074759034688 base_pytree_checkpoint_handler.py:154] [process=7][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.281762s I0421 07:11:34.516076 139074759034688 base_pytree_checkpoint_handler.py:130] [process=7] /jax/orbax/write/blocking_gbytes_per_sec: 5.395 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2859339714050293 s) (per-host) I0421 07:11:34.516133 139074759034688 base_pytree_checkpoint_handler.py:768] [process=7][thread=MainThread] Initiated Pytree async_save. Time taken: 0.286003s (batch_requests_ready=0.002396s, total_serialization_initiated=0.283528s, others=0.000078s) I0421 07:11:34.516233 139074759034688 composite_checkpoint_handler.py:715] [process=7][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.652552s (all_items=0.000036s, per_item={'items': '0.00003552'}, temp_paths=1.652517) I0421 07:11:34.516282 139074759034688 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 07:11:34.516322 139074759034688 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 07:11:37.488415 138951654373120 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_061359/linen_xpk_main_20260421_061359_14_async_ckpt_false/checkpoints/10/items/array_metadatas/process_7 I0421 07:12:13.481718 139074759034688 base_pytree_checkpoint_handler.py:130] [process=7] /jax/orbax/write/gbytes_per_sec: 40.243 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 39.25153851509094 s) (per-host) I0421 07:12:17.874476 139074759034688 event_tracking.py:125] [process=7] [sync] Finished blocking save in 48.32 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_061359/linen_xpk_main_20260421_061359_14_async_ckpt_false/checkpoints/10. I0421 07:12:21.805333 139074759034688 event_tracking.py:138] [process=7] [sync] Finished save in 52.25 seconds @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_061359/linen_xpk_main_20260421_061359_14_async_ckpt_false/checkpoints/10 I0421 07:12:21.807640 139074759034688 checkpoint_manager.py:2137] [process=7][thread=MainThread][step=10] CheckpointManager Save Finalize is syncing with other hosts... I0421 07:12:21.809269 139074759034688 checkpoint_manager.py:2146] [process=7][thread=MainThread][step=10] CheckpointManager Save Finalize is done on all hosts. I0421 07:12:21.809320 139074759034688 checkpoint_manager.py:1581] [process=7][thread=MainThread][step=10] Finished synchronous save. I0421 07:12:21.809371 139074759034688 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260421_061359/linen_xpk_main_20260421_061359_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1776755489.5526261, 'wait_for_prev_duration_secs': 6.222724914550781e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776755489.5546787, 'checkpointer_blocking_duration_secs': 52.25077819824219, 'get_old_steps_start_time': 1776755541.8054762, 'get_old_steps_duration_secs': 2.8371810913085938e-05, 'checkpoint_manager_blocking_start_time': 1776755489.5507154, 'checkpoint_manager_blocking_duration_secs': 52.258631467819214} I0421 07:12:21.809458 139074759034688 checkpointing.py:410] Saved a checkpoint at step 10. I0421 07:12:21.809500 139074759034688 max_utils.py:750] Memstats: After params initialized: I0421 07:12:21.809546 139074759034688 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_26(process=7,(2,6,0,0)) I0421 07:12:21.809576 139074759034688 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_27(process=7,(3,6,0,0)) I0421 07:12:21.809601 139074759034688 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_30(process=7,(2,7,0,0)) I0421 07:12:21.809624 139074759034688 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_31(process=7,(3,7,0,0)) I0421 07:12:22.120500 139074759034688 metric_logger.py:196] completed step: 10, seconds: 11.213, TFLOP/s/device: 1.212, Tokens/s/device: 182.644, total_weights: 65536, loss: 6.833, lm_loss: 6.833, perplexity: 927.869 I0421 07:12:22.289841 139074759034688 metric_logger.py:196] completed step: 11, seconds: 52.795, TFLOP/s/device: 0.257, Tokens/s/device: 38.791, total_weights: 65536, loss: 6.527, lm_loss: 6.527, perplexity: 683.659 I0421 07:12:22.437472 139074759034688 metric_logger.py:196] completed step: 12, seconds: 0.022, TFLOP/s/device: 611.702, Tokens/s/device: 92202.413, total_weights: 65536, loss: 6.265, lm_loss: 6.265, perplexity: 526.068 I0421 07:12:22.584825 139074759034688 metric_logger.py:196] completed step: 13, seconds: 0.153, TFLOP/s/device: 88.666, Tokens/s/device: 13364.744, total_weights: 65536, loss: 6.045, lm_loss: 6.045, perplexity: 422.001 I0421 07:12:22.589567 139074759034688 checkpointing.py:772] Waiting for step 15 to finish before checkpoint... I0421 07:12:22.879308 139074759034688 checkpointing.py:776] Waited 0.2897064685821533 seconds for step 15 to finish before starting checkpointing. I0421 07:12:22.882283 139074759034688 checkpoint_manager.py:2009] [process=7][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0421 07:12:22.883892 139074759034688 checkpoint_manager.py:1512] [process=7] Saving checkpoint at step 15 I0421 07:12:22.885483 139074759034688 event_tracking.py:70] [process=7] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_061359/linen_xpk_main_20260421_061359_14_async_ckpt_false/checkpoints/15. I0421 07:12:25.330641 139074759034688 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 07:12:26.703505 139074759034688 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0421 07:12:26.703601 139074759034688 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 07:12:26.732093 139074759034688 base_pytree_checkpoint_handler.py:154] [process=7][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.029925s I0421 07:12:26.732275 139074759034688 base_pytree_checkpoint_handler.py:130] [process=7] /jax/orbax/write/blocking_gbytes_per_sec: 45.717 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.03374147415161133 s) (per-host) I0421 07:12:26.732333 139074759034688 base_pytree_checkpoint_handler.py:768] [process=7][thread=MainThread] Initiated Pytree async_save. Time taken: 0.033808s (batch_requests_ready=0.001786s, total_serialization_initiated=0.031949s, others=0.000074s) I0421 07:12:26.732432 139074759034688 composite_checkpoint_handler.py:715] [process=7][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.403175s (all_items=0.000024s, per_item={'items': '0.00002408'}, temp_paths=1.403151) I0421 07:12:26.732474 139074759034688 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 07:12:26.732512 139074759034688 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 07:12:29.184331 138951654373120 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_061359/linen_xpk_main_20260421_061359_14_async_ckpt_false/checkpoints/15/items/array_metadatas/process_7 I0421 07:13:05.353514 139074759034688 base_pytree_checkpoint_handler.py:130] [process=7] /jax/orbax/write/gbytes_per_sec: 40.864 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 38.6549391746521 s) (per-host) I0421 07:13:09.283776 139074759034688 event_tracking.py:125] [process=7] [sync] Finished blocking save in 46.40 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_061359/linen_xpk_main_20260421_061359_14_async_ckpt_false/checkpoints/15. I0421 07:13:13.306093 139074759034688 event_tracking.py:138] [process=7] [sync] Finished save in 50.42 seconds @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_061359/linen_xpk_main_20260421_061359_14_async_ckpt_false/checkpoints/15 I0421 07:13:13.308158 139074759034688 checkpoint_manager.py:2137] [process=7][thread=MainThread][step=15] CheckpointManager Save Finalize is syncing with other hosts... I0421 07:13:13.309803 139074759034688 checkpoint_manager.py:2146] [process=7][thread=MainThread][step=15] CheckpointManager Save Finalize is done on all hosts. I0421 07:13:13.309855 139074759034688 checkpoint_manager.py:1581] [process=7][thread=MainThread][step=15] Finished synchronous save. I0421 07:13:13.309906 139074759034688 standard_logger.py:34] {'step': 15, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260421_061359/linen_xpk_main_20260421_061359_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1776755542.8822622, 'wait_for_prev_duration_secs': 6.437301635742188e-05, 'time_between_consecutive_saves_sec': 1.0729527473449707, 'checkpointer_blocking_start_time': 1776755542.8839307, 'checkpointer_blocking_duration_secs': 50.42228150367737, 'get_old_steps_start_time': 1776755593.3062317, 'get_old_steps_duration_secs': 2.574920654296875e-05, 'checkpoint_manager_blocking_start_time': 1776755542.8798697, 'checkpoint_manager_blocking_duration_secs': 50.430012464523315} I0421 07:13:13.309996 139074759034688 checkpointing.py:410] Saved a checkpoint at step 15. I0421 07:13:13.310862 139074759034688 metric_logger.py:196] completed step: 14, seconds: 0.148, TFLOP/s/device: 91.901, Tokens/s/device: 13852.252, total_weights: 65536, loss: 5.864, lm_loss: 5.864, perplexity: 352.193 I0421 07:13:13.316871 139074759034688 metric_logger.py:196] completed step: 15, seconds: 0.147, TFLOP/s/device: 92.257, Tokens/s/device: 13906.053, total_weights: 65536, loss: 5.719, lm_loss: 5.719, perplexity: 304.661 I0421 07:13:34.278196 139074759034688 metric_logger.py:196] completed step: 16, seconds: 50.726, TFLOP/s/device: 0.268, Tokens/s/device: 40.374, total_weights: 65536, loss: 5.605, lm_loss: 5.605, perplexity: 271.872 I0421 07:13:34.425605 139074759034688 metric_logger.py:196] completed step: 17, seconds: 20.815, TFLOP/s/device: 0.653, Tokens/s/device: 98.388, total_weights: 65536, loss: 5.517, lm_loss: 5.517, perplexity: 248.975 I0421 07:13:34.573139 139074759034688 metric_logger.py:196] completed step: 18, seconds: 0.152, TFLOP/s/device: 89.454, Tokens/s/device: 13483.442, total_weights: 65536, loss: 5.448, lm_loss: 5.448, perplexity: 232.333 I0421 07:13:34.720120 139074759034688 checkpointing.py:772] Waiting for step 19 to finish before checkpoint... I0421 07:13:34.720820 139074759034688 checkpointing.py:776] Waited 0.0007207393646240234 seconds for step 19 to finish before starting checkpointing. I0421 07:13:34.723032 139074759034688 checkpoint_manager.py:2009] [process=7][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0421 07:13:34.724929 139074759034688 checkpoint_manager.py:1512] [process=7] Saving checkpoint at step 19 I0421 07:13:34.726280 139074759034688 event_tracking.py:70] [process=7] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_061359/linen_xpk_main_20260421_061359_14_async_ckpt_false/checkpoints/19. I0421 07:13:37.315376 139074759034688 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 07:13:38.717193 139074759034688 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0421 07:13:38.718548 139074759034688 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 07:13:38.745923 139074759034688 base_pytree_checkpoint_handler.py:154] [process=7][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.029897s I0421 07:13:38.746063 139074759034688 base_pytree_checkpoint_handler.py:130] [process=7] /jax/orbax/write/blocking_gbytes_per_sec: 45.922 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.033591270446777344 s) (per-host) I0421 07:13:38.746118 139074759034688 base_pytree_checkpoint_handler.py:768] [process=7][thread=MainThread] Initiated Pytree async_save. Time taken: 0.033654s (batch_requests_ready=0.001809s, total_serialization_initiated=0.031778s, others=0.000067s) I0421 07:13:38.746200 139074759034688 composite_checkpoint_handler.py:715] [process=7][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.432116s (all_items=0.000031s, per_item={'items': '0.00003052'}, temp_paths=1.432085) I0421 07:13:38.746237 139074759034688 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 07:13:38.746274 139074759034688 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 07:13:40.805858 138951654373120 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_061359/linen_xpk_main_20260421_061359_14_async_ckpt_false/checkpoints/19/items/array_metadatas/process_7 I0421 07:14:17.669988 139074759034688 base_pytree_checkpoint_handler.py:130] [process=7] /jax/orbax/write/gbytes_per_sec: 40.547 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 38.957473039627075 s) (per-host) I0421 07:14:21.132645 139074759034688 event_tracking.py:125] [process=7] [sync] Finished blocking save in 46.41 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_061359/linen_xpk_main_20260421_061359_14_async_ckpt_false/checkpoints/19. I0421 07:14:24.666875 139074759034688 event_tracking.py:138] [process=7] [sync] Finished save in 49.94 seconds @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_061359/linen_xpk_main_20260421_061359_14_async_ckpt_false/checkpoints/19 I0421 07:14:24.668843 139074759034688 checkpoint_manager.py:2137] [process=7][thread=MainThread][step=19] CheckpointManager Save Finalize is syncing with other hosts... I0421 07:14:24.670805 139074759034688 checkpoint_manager.py:2146] [process=7][thread=MainThread][step=19] CheckpointManager Save Finalize is done on all hosts. I0421 07:14:24.670862 139074759034688 checkpoint_manager.py:1581] [process=7][thread=MainThread][step=19] Finished synchronous save. I0421 07:14:24.670925 139074759034688 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260421_061359/linen_xpk_main_20260421_061359_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1776755614.723011, 'wait_for_prev_duration_secs': 6.461143493652344e-05, 'time_between_consecutive_saves_sec': 21.413166522979736, 'checkpointer_blocking_start_time': 1776755614.7249672, 'checkpointer_blocking_duration_secs': 49.94202971458435, 'get_old_steps_start_time': 1776755664.6670132, 'get_old_steps_duration_secs': 2.574920654296875e-05, 'checkpoint_manager_blocking_start_time': 1776755614.7210498, 'checkpoint_manager_blocking_duration_secs': 49.949846506118774} I0421 07:14:24.671031 139074759034688 checkpointing.py:410] Saved a checkpoint at step 19. I0421 07:14:24.671074 139074759034688 checkpoint_manager.py:2009] [process=7][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0421 07:14:24.671118 139074759034688 checkpoint_manager.py:2009] [process=7][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0421 07:14:24.671815 139074759034688 metric_logger.py:196] completed step: 19, seconds: 0.147, TFLOP/s/device: 92.175, Tokens/s/device: 13893.600, 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 07:14:37 UTC 2026 EXIT_CODE=0