XPK Start: Sun Apr 19 09:13:23 UTC 2026 2026-04-19 09:13:27.577305: E external/local_xla/xla/stream_executor/cuda/cuda_fft.cc:467] Unable to register cuFFT factory: Attempting to register factory for plugin cuFFT when one has already been registered WARNING: All log messages before absl::InitializeLog() is called are written to STDERR E0000 00:00:1776590007.590110 9 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered E0000 00:00:1776590007.593905 9 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered W0000 00:00:1776590007.605421 9 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776590007.605440 9 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776590007.605443 9 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776590007.605445 9 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. 2026-04-19 09:13:47.316119: 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) I0419 09:13:47.828958 138402990782272 max_utils.py:273] Attempting to initialize the jax distributed system... INFO:2026-04-19 09:13:56,869:jax._src.distributed:140: Starting JAX distributed service on [::]:8482 I0419 09:13:56.869264 138402990782272 distributed.py:140] Starting JAX distributed service on [::]:8482 INFO:2026-04-19 09:13:56,871:jax._src.distributed:157: Connecting to JAX distributed service on mt-07-eval-6rl7u-slice-job-0-0.mt-07-eval-6rl7u:8482 I0419 09:13:56.871868 138402990782272 distributed.py:157] Connecting to JAX distributed service on mt-07-eval-6rl7u-slice-job-0-0.mt-07-eval-6rl7u:8482 I0419 09:13:57.618957 138402990782272 max_utils.py:284] Jax distributed system initialized! I0419 09:14:04.868327 138402990782272 max_utils.py:800] System Information: Jax Version: 0.8.1 I0419 09:14:04.868441 138402990782272 max_utils.py:801] System Information: Jaxlib Version: 0.8.1 I0419 09:14:04.868480 138402990782272 max_utils.py:802] System Information: Jax Backend: PJRT C API TFRT TPU v6 lite Built on Nov 12 2025 14:16:36 (1762985796) cl/831091709 I0419 09:14:04.868516 138402990782272 train_utils.py:347] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0419 09:14:05.485513 138402990782272 maxtext_utils.py:1398] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0419 09:14:05.485831 138402990782272 checkpointing.py:677] Setting up checkpoint logger... I0419 09:14:05.485888 138402990782272 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True I0419 09:14:05.485931 138402990782272 pytree_checkpoint_handler.py:589] save_device_host_concurrent_bytes=None I0419 09:14:05.486272 138402990782272 base_pytree_checkpoint_handler.py:415] 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 0x7ddfe2379100>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0419 09:14:08.767656 138402990782272 checkpointing.py:265] Enabling policy for fixed interval checkpointing. I0419 09:14:08.767900 138402990782272 checkpoint_manager.py:709] [process=7][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7dcb3c231df0>}, handler_registry=None I0419 09:14:08.768135 138402990782272 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7dcb3c231df0>` 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`. I0419 09:14:08.768183 138402990782272 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7dcb3c12c050>` 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`. I0419 09:14:08.768220 138402990782272 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 0x7dcb3c231df0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7dcb3c231df0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7dcb3c12c050>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7dcb3c12c050>}). I0419 09:14:08.770872 138402990782272 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.33 I0419 09:14:08.770955 138402990782272 async_checkpointer.py:177] [process=7][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7ddfbd4bb2e0> timeout: 600 secs and primary_host=0 for async checkpoint writes I0419 09:14:09.466298 138402990782272 checkpoint_manager.py:1818] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260419_085454/linen_xpk_test_pipeline_scan_nnx_20260419_085454_07_eval/checkpoints I0419 09:14:09.895144 138402990782272 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=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=10), preservation_policy=LatestN(n=None), prevent_write_metrics=False, enable_should_save_is_saving_in_progress_check=True, enable_per_process_directory_creation=False, lightweight_initialize=False), root_directory=gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260419_085454/linen_xpk_test_pipeline_scan_nnx_20260419_085454_07_eval/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7dcb3c1301a0> I0419 09:14:09.895321 138402990782272 checkpointing.py:301] Checkpoint manager created! I0419 09:14:10.784662 138402990782272 nnx_wrappers.py:453] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0419 09:14:10.784771 138402990782272 nnx_wrappers.py:453] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0419 09:14:11.155409 138402990782272 attentions.py:1084] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0419 09:14:11.155508 138402990782272 attentions.py:1084] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0419 09:14:11.171465 138402990782272 attentions.py:1085] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0419 09:14:11.171527 138402990782272 attentions.py:1085] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0419 09:14:11.195381 138402990782272 attentions.py:1150] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0419 09:14:11.195451 138402990782272 attentions.py:1150] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0419 09:14:11.211473 138402990782272 attentions.py:1151] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0419 09:14:11.211544 138402990782272 attentions.py:1151] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0419 09:14:11.227517 138402990782272 attentions.py:1152] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0419 09:14:11.227590 138402990782272 attentions.py:1152] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0419 09:14:11.251657 138402990782272 attentions.py:1193] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0419 09:14:11.251729 138402990782272 attentions.py:1193] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0419 09:14:11.271362 138402990782272 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0419 09:14:11.271428 138402990782272 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0419 09:14:11.466844 138402990782272 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint I0419 09:14:11.466960 138402990782272 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0419 09:14:12.889315 138402990782272 maxtext_utils.py:1501] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: PartitionSpec('norm',) Physical: (None,) I0419 09:14:12.889444 138402990782272 maxtext_utils.py:1501] params/params/decoder/layers/mlp/wi_0/kernel Shape: float32[2048,16,7168] Logical: PartitionSpec('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0419 09:14:12.889498 138402990782272 maxtext_utils.py:1501] params/params/decoder/layers/mlp/wi_1/kernel Shape: float32[2048,16,7168] Logical: PartitionSpec('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0419 09:14:12.889575 138402990782272 maxtext_utils.py:1501] params/params/decoder/layers/mlp/wo/kernel Shape: float32[7168,16,2048] Logical: PartitionSpec('mlp', 'layers', 'embed') Physical: (None, None, 'fsdp') I0419 09:14:12.889714 138402990782272 maxtext_utils.py:1501] params/params/decoder/layers/post_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: PartitionSpec('norm', 'layers') Physical: (None, None) I0419 09:14:12.889787 138402990782272 maxtext_utils.py:1501] params/params/decoder/layers/pre_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: PartitionSpec('norm', 'layers') Physical: (None, None) I0419 09:14:12.889859 138402990782272 maxtext_utils.py:1501] params/params/decoder/layers/self_attention/key/kernel Shape: float32[2048,16,16,128] Logical: PartitionSpec('embed', 'layers', 'kv_heads', 'kv_head_dim') Physical: ('fsdp', None, None, None) I0419 09:14:12.889921 138402990782272 maxtext_utils.py:1501] params/params/decoder/layers/self_attention/out/kernel Shape: float32[16,16,128,2048] Logical: PartitionSpec('heads', 'layers', 'kv', 'embed') Physical: (None, None, None, 'fsdp') I0419 09:14:12.889965 138402990782272 maxtext_utils.py:1501] params/params/decoder/layers/self_attention/query/kernel Shape: float32[2048,16,16,128] Logical: PartitionSpec('embed', 'layers', 'q_heads', 'kv') Physical: ('fsdp', None, None, None) I0419 09:14:12.890004 138402990782272 maxtext_utils.py:1501] params/params/decoder/layers/self_attention/value/kernel Shape: float32[2048,16,16,128] Logical: PartitionSpec('embed', 'layers', 'kv_heads', 'kv_head_dim') Physical: ('fsdp', None, None, None) I0419 09:14:12.890053 138402990782272 maxtext_utils.py:1501] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: PartitionSpec('embed', 'vocab') Physical: ('fsdp', None) I0419 09:14:12.890100 138402990782272 maxtext_utils.py:1501] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: PartitionSpec('vocab', 'embed') Physical: (None, 'fsdp') I0419 09:14:13.392812 138402990782272 train.py:156] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0419 09:14:13.392914 138402990782272 train.py:156] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0419 09:14:13.408036 138402990782272 train.py:163] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0419 09:14:13.408101 138402990782272 train.py:163] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0419 09:14:24.291520 138402990782272 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. I0419 09:14:24.292399 138402990782272 metric_logger.py:289] number parameters: 1.104 billion I0419 09:14:35.260902 138402990782272 checkpointing.py:772] Waiting for step 0 to finish before checkpoint... I0419 09:14:35.413997 138402990782272 checkpointing.py:776] Waited 0.1530771255493164 seconds for step 0 to finish before starting checkpointing. I0419 09:14:35.416682 138402990782272 checkpoint_manager.py:2013] [process=7][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0419 09:14:35.418450 138402990782272 checkpoint_manager.py:1518] [process=7] Saving checkpoint at step 0 I0419 09:14:35.421765 138402990782272 async_checkpointer.py:452] [process=7] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260419_085454/linen_xpk_test_pipeline_scan_nnx_20260419_085454_07_eval/checkpoints/0. I0419 09:14:36.394450 138402990782272 signaling_client.py:364] Using JaxDistributedSignalingClient I0419 09:14:36.395497 138402990782272 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array. I0419 09:14:36.395571 138402990782272 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 I0419 09:14:36.642581 138402990782272 base_pytree_checkpoint_handler.py:153] [process=7][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.248214s I0419 09:14:36.642757 138402990782272 base_pytree_checkpoint_handler.py:129] [process=7] /jax/checkpoint/write/blocking_gbytes_per_sec: 1.653 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.9333150386810303 s) (per-host) I0419 09:14:36.642812 138402990782272 base_pytree_checkpoint_handler.py:737] [process=7][thread=MainThread] Initiated Pytree async_save. Time taken: 0.933382s (batch_requests_ready=0.681524s, total_serialization_initiated=0.251782s, others=0.000075s) I0419 09:14:36.642904 138402990782272 composite_checkpoint_handler.py:715] [process=7][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.937464s (all_items=0.000021s, per_item={'items': '0.00002050'}, temp_paths=0.937443) I0419 09:14:36.643911 138279416489728 async_checkpointer.py:79] [process=7][thread=async_save] Background save thread started. I0419 09:14:36.644089 138402990782272 async_checkpointer.py:561] Finished blocking save. Time taken: 1.225565s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260419_085454/linen_xpk_test_pipeline_scan_nnx_20260419_085454_07_eval/checkpoints/0. I0419 09:14:36.649189 138402990782272 checkpoint_manager.py:1566] [process=7][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0419 09:14:36.649516 138275121522432 async_checkpointer.py:265] [process=7][thread=save_finalize] Waiting for background save thread=async_save. I0419 09:14:36.649698 138402990782272 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260419_085454/linen_xpk_test_pipeline_scan_nnx_20260419_085454_07_eval/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776590075.4166617, 'wait_for_prev_duration_secs': 6.985664367675781e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776590075.4184902, 'checkpointer_blocking_duration_secs': 1.2257084846496582, 'get_old_steps_start_time': 1776590076.644221, 'get_old_steps_duration_secs': 2.5510787963867188e-05, 'checkpoint_manager_blocking_start_time': 1776590075.4146187, 'checkpoint_manager_blocking_duration_secs': 1.2350397109985352} I0419 09:14:36.649806 138402990782272 checkpointing.py:408] Started an asynchronous checkpoint save for step 0 I0419 09:14:36.649858 138402990782272 max_utils.py:750] Memstats: After params initialized: I0419 09:14:36.649908 138402990782272 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_26(process=7,(2,6,0,0)) I0419 09:14:36.649941 138402990782272 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_27(process=7,(3,6,0,0)) I0419 09:14:36.649969 138402990782272 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_30(process=7,(2,7,0,0)) I0419 09:14:36.649995 138402990782272 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_31(process=7,(3,7,0,0)) I0419 09:14:36.905492 138402990782272 metric_logger.py:185] completed step: 0, seconds: 10.968, TFLOP/s/device: 1.239, Tokens/s/device: 186.718, total_weights: 65536, loss: 10.874 I0419 09:14:37.078720 138402990782272 metric_logger.py:185] completed step: 1, seconds: 1.643, TFLOP/s/device: 8.268, Tokens/s/device: 1246.287, total_weights: 65536, loss: 10.874 I0419 09:14:37.492216 138402990782272 metric_logger.py:185] completed step: 2, seconds: 0.026, TFLOP/s/device: 521.399, Tokens/s/device: 78590.890, total_weights: 65536, loss: 10.263 I0419 09:14:37.639653 138402990782272 metric_logger.py:185] completed step: 3, seconds: 0.414, TFLOP/s/device: 32.817, Tokens/s/device: 4946.466, total_weights: 65536, loss: 9.734 I0419 09:14:37.934860 138402990782272 metric_logger.py:185] completed step: 4, seconds: 0.153, TFLOP/s/device: 89.017, Tokens/s/device: 13417.542, total_weights: 65536, loss: 9.278 I0419 09:14:37.940587 138402990782272 metric_logger.py:185] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.216, Tokens/s/device: 13899.824, total_weights: 65536, loss: 8.892 I0419 09:14:56.748069 138402990782272 metric_logger.py:185] completed step: 6, seconds: 0.296, TFLOP/s/device: 45.975, Tokens/s/device: 6929.852, total_weights: 65536, loss: 8.592 I0419 09:14:56.895666 138402990782272 metric_logger.py:185] completed step: 7, seconds: 18.661, TFLOP/s/device: 0.728, Tokens/s/device: 109.749, total_weights: 65536, loss: 8.384 I0419 09:14:57.043114 138402990782272 metric_logger.py:185] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.301, Tokens/s/device: 13460.489, total_weights: 65536, loss: 8.255 I0419 09:14:57.190272 138402990782272 checkpointing.py:772] Waiting for step 9 to finish before checkpoint... I0419 09:14:57.190958 138402990782272 checkpointing.py:776] Waited 0.0007071495056152344 seconds for step 9 to finish before starting checkpointing. I0419 09:14:57.192897 138402990782272 checkpoint_manager.py:2024] [process=7][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0419 09:14:57.584839 2610 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0419 09:14:59.916846 138279424882432 array_metadata_store.py:203] [process=7][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260419_085454/linen_xpk_test_pipeline_scan_nnx_20260419_085454_07_eval/checkpoints/0/items/array_metadatas/process_7 I0419 09:15:29.986106 138279416489728 base_pytree_checkpoint_handler.py:129] [process=7] /jax/checkpoint/write/gbytes_per_sec: 29.103 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 54.27662134170532 s) (per-host) I0419 09:15:29.986222 138279416489728 async_checkpointer.py:90] [process=7][thread=async_save] 3 Handler Commit operations completed. Time taken: 53.342198s. I0419 09:15:40.388294 138279416489728 async_checkpointer.py:144] [process=7][thread=async_save] Background save thread done. Time taken: 63.744253s. I0419 09:15:40.388622 138275121522432 async_checkpointer.py:273] [process=7][thread=save_finalize] Done with waiting for background save thread=async_save. I0419 09:15:40.388750 138275121522432 async_checkpointer.py:283] [process=7][thread=save_finalize] No errors found in background save thread=async_save. I0419 09:15:40.388802 138275121522432 checkpoint_manager.py:2133] [process=7][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0419 09:15:40.390743 138275121522432 checkpoint_manager.py:2142] [process=7][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0419 09:15:40.390926 138402990782272 checkpoint_manager.py:2036] [process=7][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0. W0419 09:15:40.391053 138402990782272 checkpoint_manager.py:1458] Waiting for previous save to complete took 43.198160 seconds. If this number is high, consider checkpointing less frequently. I0419 09:15:40.392959 138402990782272 checkpoint_manager.py:1518] [process=7] Saving checkpoint at step 9 I0419 09:15:40.396354 138402990782272 async_checkpointer.py:452] [process=7] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260419_085454/linen_xpk_test_pipeline_scan_nnx_20260419_085454_07_eval/checkpoints/9. I0419 09:15:40.953820 138402990782272 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array. I0419 09:15:40.953922 138402990782272 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 I0419 09:15:40.998505 138402990782272 base_pytree_checkpoint_handler.py:153] [process=7][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.046627s I0419 09:15:40.998683 138402990782272 base_pytree_checkpoint_handler.py:129] [process=7] /jax/checkpoint/write/blocking_gbytes_per_sec: 5.263 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2930893898010254 s) (per-host) I0419 09:15:40.998733 138402990782272 base_pytree_checkpoint_handler.py:737] [process=7][thread=MainThread] Initiated Pytree async_save. Time taken: 0.293148s (batch_requests_ready=0.244578s, total_serialization_initiated=0.048502s, others=0.000067s) I0419 09:15:40.998823 138402990782272 composite_checkpoint_handler.py:715] [process=7][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.297250s (all_items=0.000017s, per_item={'items': '0.00001740'}, temp_paths=0.297233) I0419 09:15:40.999678 138276203656960 async_checkpointer.py:79] [process=7][thread=async_save] Background save thread started. I0419 09:15:40.999839 138402990782272 async_checkpointer.py:561] Finished blocking save. Time taken: 0.606807s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260419_085454/linen_xpk_test_pipeline_scan_nnx_20260419_085454_07_eval/checkpoints/9. I0419 09:15:41.441361 138402990782272 checkpoint_manager.py:1566] [process=7][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0419 09:15:41.441754 138275121522432 async_checkpointer.py:265] [process=7][thread=save_finalize] Waiting for background save thread=async_save. I0419 09:15:41.441937 138402990782272 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260419_085454/linen_xpk_test_pipeline_scan_nnx_20260419_085454_07_eval/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776590097.192869, 'wait_for_prev_duration_secs': 43.19815993309021, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776590140.3929982, 'checkpointer_blocking_duration_secs': 0.6069536209106445, 'get_old_steps_start_time': 1776590140.9999733, 'get_old_steps_duration_secs': 2.5510787963867188e-05, 'checkpoint_manager_blocking_start_time': 1776590097.191181, 'checkpoint_manager_blocking_duration_secs': 44.25071859359741} I0419 09:15:41.442050 138402990782272 checkpointing.py:408] Started an asynchronous checkpoint save for step 9 I0419 09:15:41.442096 138402990782272 checkpoint_manager.py:2024] [process=7][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0419 09:15:46.839059 138279424882432 array_metadata_store.py:203] [process=7][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260419_085454/linen_xpk_test_pipeline_scan_nnx_20260419_085454_07_eval/checkpoints/9/items/array_metadatas/process_7 I0419 09:16:22.051949 138276203656960 base_pytree_checkpoint_handler.py:129] [process=7] /jax/checkpoint/write/gbytes_per_sec: 38.204 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.34631299972534 s) (per-host) I0419 09:16:22.052072 138276203656960 async_checkpointer.py:90] [process=7][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.052283s. I0419 09:16:32.738827 138276203656960 async_checkpointer.py:144] [process=7][thread=async_save] Background save thread done. Time taken: 51.739021s. I0419 09:16:32.739120 138275121522432 async_checkpointer.py:273] [process=7][thread=save_finalize] Done with waiting for background save thread=async_save. I0419 09:16:32.739243 138275121522432 async_checkpointer.py:283] [process=7][thread=save_finalize] No errors found in background save thread=async_save. I0419 09:16:32.739292 138275121522432 checkpoint_manager.py:2133] [process=7][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0419 09:16:32.740484 138275121522432 checkpoint_manager.py:2142] [process=7][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0419 09:16:32.740682 138402990782272 checkpoint_manager.py:2036] [process=7][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9. I0419 09:16:32.740829 138402990782272 checkpoint_manager.py:2013] [process=7][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0419 09:16:32.741505 138402990782272 metric_logger.py:185] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.161, Tokens/s/device: 13891.527, total_weights: 65536, loss: 8.179 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Sun Apr 19 09:16:44 UTC 2026 EXIT_CODE=0