XPK Start: Sat Apr 18 19:28:06 UTC 2026 PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used. 2026-04-18 19:28:31.072764: 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) I0418 19:28:31.253209 132355044058944 max_utils.py:273] Attempting to initialize the jax distributed system... I0418 19:28:40.294209 132355044058944 distributed.py:149] Starting JAX distributed service on [::]:8482 I0418 19:28:40.296422 132355044058944 distributed.py:172] Connecting to JAX distributed service on mt-15-ocdbt-true-rs-fhed3-slice-job-0-0.mt-15-ocdbt-true-rs-fhed3:8482 I0418 19:28:41.751239 132355044058944 max_utils.py:284] Jax distributed system initialized! I0418 19:28:46.987035 132355044058944 max_utils.py:800] System Information: Jax Version: 0.9.2 I0418 19:28:46.987138 132355044058944 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0418 19:28:46.987176 132355044058944 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 I0418 19:28:46.987209 132355044058944 train_utils.py:348] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0418 19:28:47.684924 132355044058944 maxtext_utils.py:1551] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0418 19:28:47.685195 132355044058944 checkpointing.py:677] Setting up checkpoint logger... I0418 19:28:47.685248 132355044058944 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True I0418 19:28:47.685291 132355044058944 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0418 19:28:47.685629 132355044058944 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 0x785fbb715040>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0418 19:28:49.811168 132355044058944 checkpointing.py:265] Enabling policy for fixed interval checkpointing. I0418 19:28:49.811394 132355044058944 checkpoint_manager.py:708] [process=5][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x784c0052e930>}, handler_registry=None I0418 19:28:49.811643 132355044058944 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x784c0052e930>` 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`. I0418 19:28:49.811691 132355044058944 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x784c00326f90>` 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`. I0418 19:28:49.811726 132355044058944 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 0x784c0052e930>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x784c0052e930>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x784c00326f90>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x784c00326f90>}). I0418 19:28:49.812072 132355044058944 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0418 19:28:49.812146 132355044058944 async_checkpointer.py:192] [process=5][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x784c0028fd80> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0418 19:28:52.153467 132234367452928 checkpoint.py:228] Read Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776540361293379292, 'commit_timestamp_nsecs': 1776540408852754834, 'custom_metadata': {}} from gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_15_ocdbt_true/checkpoints/9/_CHECKPOINT_METADATA I0418 19:28:52.408132 132234367452928 checkpoint_manager.py:1871] Missing metrics for step 9 I0418 19:28:52.818521 132355044058944 checkpoint_manager.py:1812] Found 3 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_15_ocdbt_true/checkpoints I0418 19:28:54.533291 132355044058944 checkpoint_manager.py:929] [process=5][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=True, 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_20260418_180002/linen_xpk_main_20260418_180002_15_ocdbt_true/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x784c00487b30> I0418 19:28:54.533489 132355044058944 checkpointing.py:301] Checkpoint manager created! I0418 19:28:55.453088 132355044058944 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0418 19:28:55.453202 132355044058944 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0418 19:28:55.829589 132355044058944 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0418 19:28:55.829678 132355044058944 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0418 19:28:55.845787 132355044058944 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0418 19:28:55.845841 132355044058944 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0418 19:28:55.869264 132355044058944 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0418 19:28:55.869331 132355044058944 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0418 19:28:55.885691 132355044058944 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0418 19:28:55.885752 132355044058944 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0418 19:28:55.902081 132355044058944 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0418 19:28:55.902141 132355044058944 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0418 19:28:55.927446 132355044058944 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0418 19:28:55.927527 132355044058944 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0418 19:28:55.948697 132355044058944 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0418 19:28:55.948765 132355044058944 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0418 19:28:56.174516 132355044058944 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint I0418 19:28:56.174620 132355044058944 checkpointing.py:581] restoring from this run's directory step 9 I0418 19:28:56.425709 132355044058944 event_tracking.py:70] [process=5] [sync] Started load checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_15_ocdbt_true/checkpoints/9. I0418 19:28:57.232165 132355044058944 checkpointer.py:307] Restoring checkpoint from gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_15_ocdbt_true/checkpoints/9. I0418 19:28:57.232611 132355044058944 event_tracking.py:125] [process=5] [sync] Finished blocking load in 0.81 seconds. Continuing load @ gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_15_ocdbt_true/checkpoints/9. I0418 19:28:59.291837 1445 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0418 19:29:08.376130 132355044058944 jax_array_handlers.py:843] [process=5] /jax/orbax/read/worker/io/requested throughput: 173.840 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 9.090365171432495 s) (per-host) I0418 19:29:08.381626 132355044058944 base_pytree_checkpoint_handler.py:130] [process=5] /jax/checkpoint/read/gbytes_per_sec: 166.705 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 9.493396997451782 s) (per-host) I0418 19:29:08.383747 132355044058944 event_tracking.py:138] [process=5] [sync] Finished load in 11.96 seconds @ gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_15_ocdbt_true/checkpoints/9 I0418 19:29:08.383842 132355044058944 standard_logger.py:34] {'step': 9, 'event_type': 'restore', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_15_ocdbt_true/checkpoints', 'checkpointer_start_time': 1776540536.4256046, 'checkpointer_duration_secs': 11.95820951461792, 'checkpoint_manager_start_time': 1776540536.17487, 'checkpoint_manager_duration_secs': 12.208945989608765} fsdp: 32 I0418 19:29:08.806889 132355044058944 maxtext_utils.py:1654] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0418 19:29:08.807013 132355044058944 maxtext_utils.py:1654] params/params/decoder/layers/mlp/wi_0/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0418 19:29:08.807071 132355044058944 maxtext_utils.py:1654] params/params/decoder/layers/mlp/wi_1/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0418 19:29:08.807125 132355044058944 maxtext_utils.py:1654] params/params/decoder/layers/mlp/wo/kernel Shape: float32[7168,16,2048] Logical: P('mlp', 'layers', 'embed') Physical: (None, None, 'fsdp') I0418 19:29:08.807175 132355044058944 maxtext_utils.py:1654] params/params/decoder/layers/post_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0418 19:29:08.807212 132355044058944 maxtext_utils.py:1654] params/params/decoder/layers/pre_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0418 19:29:08.807280 132355044058944 maxtext_utils.py:1654] 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) I0418 19:29:08.807373 132355044058944 maxtext_utils.py:1654] 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') I0418 19:29:08.807450 132355044058944 maxtext_utils.py:1654] 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) I0418 19:29:08.807528 132355044058944 maxtext_utils.py:1654] 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) I0418 19:29:08.807608 132355044058944 maxtext_utils.py:1654] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', None) I0418 19:29:08.807697 132355044058944 maxtext_utils.py:1654] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0418 19:29:09.291992 132355044058944 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0418 19:29:09.292089 132355044058944 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0418 19:29:09.307698 132355044058944 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0418 19:29:09.307765 132355044058944 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0418 19:29:20.210910 132355044058944 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. I0418 19:29:20.211751 132355044058944 metric_logger.py:301] number parameters: 1.104 billion I0418 19:29:31.659871 132355044058944 checkpointing.py:772] Waiting for step 10 to finish before checkpoint... I0418 19:29:31.814372 132355044058944 checkpointing.py:776] Waited 0.1544795036315918 seconds for step 10 to finish before starting checkpointing. I0418 19:29:31.816780 132355044058944 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0418 19:29:31.818386 132355044058944 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 10 I0418 19:29:31.819846 132355044058944 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_15_ocdbt_true/checkpoints/10. I0418 19:29:33.010025 132355044058944 signaling_client.py:364] Using JaxDistributedSignalingClient I0418 19:29:33.010978 132355044058944 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0418 19:29:33.011033 132355044058944 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 I0418 19:29:33.288638 132355044058944 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.278691s I0418 19:29:33.288813 132355044058944 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 5.456 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2827270030975342 s) (per-host) I0418 19:29:33.288866 132355044058944 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.282791s (batch_requests_ready=0.002329s, total_serialization_initiated=0.280390s, others=0.000073s) I0418 19:29:33.288939 132355044058944 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.286809s (all_items=0.000016s, per_item={'items': '0.00001597'}, temp_paths=0.286793) I0418 19:29:33.289632 132355044058944 event_tracking.py:125] [process=5] [async] Finished blocking save in 1.47 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_15_ocdbt_true/checkpoints/10. I0418 19:29:33.290011 132232228361984 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-18 19:49:33.289969 I0418 19:29:33.294322 132355044058944 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=10] Starting CheckpointManager Save Finalize thread=save_finalize I0418 19:29:33.294680 132233855760128 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0418 19:29:33.294839 132355044058944 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_15_ocdbt_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776540571.8167553, 'wait_for_prev_duration_secs': 6.842613220214844e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776540571.818424, 'checkpointer_blocking_duration_secs': 1.471742868423462, 'get_old_steps_start_time': 1776540573.29019, 'get_old_steps_duration_secs': 3.361701965332031e-05, 'checkpoint_manager_blocking_start_time': 1776540571.814906, 'checkpoint_manager_blocking_duration_secs': 1.4798967838287354} I0418 19:29:33.294945 132355044058944 checkpointing.py:408] Started an asynchronous checkpoint save for step 10 I0418 19:29:33.294995 132355044058944 max_utils.py:750] Memstats: After params initialized: I0418 19:29:33.295044 132355044058944 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_18(process=5,(2,4,0,0)) I0418 19:29:33.295076 132355044058944 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_19(process=5,(3,4,0,0)) I0418 19:29:33.295102 132355044058944 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_22(process=5,(2,5,0,0)) I0418 19:29:33.295126 132355044058944 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_23(process=5,(3,5,0,0)) I0418 19:29:33.613593 132355044058944 metric_logger.py:196] completed step: 10, seconds: 11.448, TFLOP/s/device: 1.187, Tokens/s/device: 178.896, total_weights: 65536, loss: 6.833, lm_loss: 6.833, perplexity: 927.869 I0418 19:29:33.793893 132355044058944 metric_logger.py:196] completed step: 11, seconds: 1.952, TFLOP/s/device: 6.960, Tokens/s/device: 1049.058, total_weights: 65536, loss: 6.527, lm_loss: 6.527, perplexity: 683.659 I0418 19:29:33.941802 132355044058944 metric_logger.py:196] completed step: 12, seconds: 0.033, TFLOP/s/device: 410.947, Tokens/s/device: 61942.352, total_weights: 65536, loss: 6.265, lm_loss: 6.265, perplexity: 526.068 I0418 19:29:34.089167 132355044058944 metric_logger.py:196] completed step: 13, seconds: 0.153, TFLOP/s/device: 88.638, Tokens/s/device: 13360.559, total_weights: 65536, loss: 6.045, lm_loss: 6.045, perplexity: 422.001 I0418 19:29:34.093660 132355044058944 checkpointing.py:772] Waiting for step 15 to finish before checkpoint... I0418 19:29:34.383551 132355044058944 checkpointing.py:776] Waited 0.2898554801940918 seconds for step 15 to finish before starting checkpointing. I0418 19:29:34.386543 132355044058944 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=10][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0418 19:29:39.474374 132233285318400 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_15_ocdbt_true/checkpoints/10/items/array_metadatas/process_5 I0418 19:30:14.898998 132232228361984 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 37.706 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.8928759098053 s) (per-host) I0418 19:30:14.899122 132232228361984 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.608992s. I0418 19:30:23.475764 132232228361984 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 50.185618s. I0418 19:30:23.476056 132233855760128 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0418 19:30:23.476172 132233855760128 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0418 19:30:23.476221 132233855760128 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=10] CheckpointManager Save Finalize is syncing with other hosts... I0418 19:30:23.477830 132233855760128 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=10] CheckpointManager Save Finalize is done on all hosts. I0418 19:30:23.477956 132355044058944 checkpoint_manager.py:2032] [process=5][thread=MainThread][step=10][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=10. W0418 19:30:23.478022 132355044058944 checkpoint_manager.py:1452] Waiting for previous save to complete took 49.091486 seconds. If this number is high, consider checkpointing less frequently. I0418 19:30:23.480166 132355044058944 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 15 I0418 19:30:23.482683 132355044058944 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_15_ocdbt_true/checkpoints/15. I0418 19:30:24.192102 132355044058944 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0418 19:30:24.192192 132355044058944 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 I0418 19:30:24.217782 132355044058944 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.026762s I0418 19:30:24.217926 132355044058944 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 50.766 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.03038620948791504 s) (per-host) I0418 19:30:24.217982 132355044058944 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.030451s (batch_requests_ready=0.001930s, total_serialization_initiated=0.028449s, others=0.000072s) I0418 19:30:24.218058 132355044058944 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.035557s (all_items=0.000013s, per_item={'items': '0.00001311'}, temp_paths=0.035544) I0418 19:30:24.218775 132355044058944 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.74 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_15_ocdbt_true/checkpoints/15. I0418 19:30:24.219119 132233855760128 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-18 19:50:24.219082 I0418 19:30:24.231419 132355044058944 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=15] Starting CheckpointManager Save Finalize thread=save_finalize I0418 19:30:24.231682 132227374360320 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0418 19:30:24.231816 132355044058944 standard_logger.py:34] {'step': 15, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_15_ocdbt_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776540574.3865123, 'wait_for_prev_duration_secs': 49.09148597717285, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776540623.480205, 'checkpointer_blocking_duration_secs': 0.7390553951263428, 'get_old_steps_start_time': 1776540624.2192838, 'get_old_steps_duration_secs': 3.123283386230469e-05, 'checkpoint_manager_blocking_start_time': 1776540574.3841238, 'checkpoint_manager_blocking_duration_secs': 49.847657203674316} I0418 19:30:24.231933 132355044058944 checkpointing.py:408] Started an asynchronous checkpoint save for step 15 I0418 19:30:24.232731 132355044058944 metric_logger.py:196] completed step: 14, seconds: 0.148, TFLOP/s/device: 91.978, Tokens/s/device: 13863.973, total_weights: 65536, loss: 5.864, lm_loss: 5.864, perplexity: 352.193 I0418 19:30:24.238857 132355044058944 metric_logger.py:196] completed step: 15, seconds: 0.147, TFLOP/s/device: 92.187, Tokens/s/device: 13895.391, total_weights: 65536, loss: 5.719, lm_loss: 5.719, perplexity: 304.661 I0418 19:30:32.385009 132233285318400 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_15_ocdbt_true/checkpoints/15/items/array_metadatas/process_5 I0418 19:30:46.828865 132355044058944 metric_logger.py:196] completed step: 16, seconds: 50.144, TFLOP/s/device: 0.271, Tokens/s/device: 40.843, total_weights: 65536, loss: 5.605, lm_loss: 5.605, perplexity: 271.872 I0418 19:30:46.976232 132355044058944 metric_logger.py:196] completed step: 17, seconds: 22.444, TFLOP/s/device: 0.605, Tokens/s/device: 91.250, total_weights: 65536, loss: 5.517, lm_loss: 5.517, perplexity: 248.975 I0418 19:30:47.123577 132355044058944 metric_logger.py:196] completed step: 18, seconds: 0.152, TFLOP/s/device: 89.190, Tokens/s/device: 13443.701, total_weights: 65536, loss: 5.448, lm_loss: 5.448, perplexity: 232.333 I0418 19:30:47.270324 132355044058944 checkpointing.py:772] Waiting for step 19 to finish before checkpoint... I0418 19:30:47.271039 132355044058944 checkpointing.py:776] Waited 0.0007314682006835938 seconds for step 19 to finish before starting checkpointing. I0418 19:30:47.273076 132355044058944 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=15][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0418 19:31:07.799162 132233855760128 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 36.220 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 43.61159372329712 s) (per-host) I0418 19:31:07.799282 132233855760128 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 43.580052s. I0418 19:31:14.769452 132233855760128 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 50.550207s. I0418 19:31:14.769710 132227374360320 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0418 19:31:14.769768 132227374360320 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0418 19:31:14.769810 132227374360320 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=15] CheckpointManager Save Finalize is syncing with other hosts... I0418 19:31:14.775332 132227374360320 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=15] CheckpointManager Save Finalize is done on all hosts. I0418 19:31:14.775601 132355044058944 checkpoint_manager.py:2032] [process=5][thread=MainThread][step=15][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=15. W0418 19:31:14.775743 132355044058944 checkpoint_manager.py:1452] Waiting for previous save to complete took 27.502671 seconds. If this number is high, consider checkpointing less frequently. I0418 19:31:14.777301 132355044058944 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 19 I0418 19:31:14.779512 132355044058944 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_15_ocdbt_true/checkpoints/19. I0418 19:31:15.491492 132355044058944 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0418 19:31:15.491583 132355044058944 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 I0418 19:31:15.517027 132355044058944 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.026484s I0418 19:31:15.517159 132355044058944 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 51.337 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.030048131942749023 s) (per-host) I0418 19:31:15.517207 132355044058944 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.030104s (batch_requests_ready=0.001777s, total_serialization_initiated=0.028267s, others=0.000060s) I0418 19:31:15.517280 132355044058944 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.034261s (all_items=0.000012s, per_item={'items': '0.00001168'}, temp_paths=0.034250) I0418 19:31:15.517949 132355044058944 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.74 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_15_ocdbt_true/checkpoints/19. I0418 19:31:15.518269 132233285318400 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-18 19:51:15.518231 I0418 19:31:15.937484 132355044058944 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=19] Starting CheckpointManager Save Finalize thread=save_finalize I0418 19:31:15.937866 132227374360320 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0418 19:31:15.938045 132355044058944 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_15_ocdbt_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776540647.273046, 'wait_for_prev_duration_secs': 27.502670526504517, 'time_between_consecutive_saves_sec': 23.795177221298218, 'checkpointer_blocking_start_time': 1776540674.777338, 'checkpointer_blocking_duration_secs': 0.7410800457000732, 'get_old_steps_start_time': 1776540675.518437, 'get_old_steps_duration_secs': 3.552436828613281e-05, 'checkpoint_manager_blocking_start_time': 1776540647.2712762, 'checkpoint_manager_blocking_duration_secs': 28.666731119155884} I0418 19:31:15.938175 132355044058944 checkpointing.py:408] Started an asynchronous checkpoint save for step 19 I0418 19:31:15.938223 132355044058944 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=19][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0418 19:31:21.817786 132227413309184 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_15_ocdbt_true/checkpoints/19/items/array_metadatas/process_5 I0418 19:31:56.855417 132233285318400 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 38.184 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.36826753616333 s) (per-host) I0418 19:31:56.855550 132233285318400 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.337165s. I0418 19:32:05.395843 132233285318400 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 49.877443s. I0418 19:32:05.396080 132227374360320 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0418 19:32:05.396138 132227374360320 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0418 19:32:05.396177 132227374360320 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=19] CheckpointManager Save Finalize is syncing with other hosts... I0418 19:32:05.397910 132227374360320 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=19] CheckpointManager Save Finalize is done on all hosts. I0418 19:32:05.400079 132355044058944 checkpoint_manager.py:2032] [process=5][thread=MainThread][step=19][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=19. I0418 19:32:05.400227 132355044058944 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0418 19:32:05.401252 132355044058944 metric_logger.py:196] completed step: 19, seconds: 0.147, TFLOP/s/device: 92.310, Tokens/s/device: 13913.894, total_weights: 65536, loss: 5.391, lm_loss: 5.391, perplexity: 219.349 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Sat Apr 18 19:32:17 UTC 2026 EXIT_CODE=0