XPK Start: Thu Apr 23 17:46:15 UTC 2026 2026-04-23 17:46:19.201429: 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 00:00:1776966379.213805 10 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered E0000 00:00:1776966379.217697 10 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered W0000 00:00:1776966379.229452 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776966379.229470 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776966379.229474 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776966379.229476 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. 2026-04-23 17:46:38.431901: E external/local_xla/xla/stream_executor/cuda/cuda_platform.cc:51] failed call to cuInit: INTERNAL: CUDA error: Failed call to cuInit: UNKNOWN ERROR (303) I0423 17:46:38.953424 138377733605184 max_utils.py:273] Attempting to initialize the jax distributed system... INFO:2026-04-23 17:46:47,994:jax._src.distributed:140: Starting JAX distributed service on [::]:8482 I0423 17:46:47.994849 138377733605184 distributed.py:140] Starting JAX distributed service on [::]:8482 INFO:2026-04-23 17:46:47,997:jax._src.distributed:157: Connecting to JAX distributed service on mt-07-eval-dis2p-slice-job-0-0.mt-07-eval-dis2p:8482 I0423 17:46:47.997185 138377733605184 distributed.py:157] Connecting to JAX distributed service on mt-07-eval-dis2p-slice-job-0-0.mt-07-eval-dis2p:8482 I0423 17:46:49.291754 138377733605184 max_utils.py:284] Jax distributed system initialized! I0423 17:46:55.129777 138377733605184 max_utils.py:800] System Information: Jax Version: 0.8.1 I0423 17:46:55.129882 138377733605184 max_utils.py:801] System Information: Jaxlib Version: 0.8.1 I0423 17:46:55.129929 138377733605184 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 I0423 17:46:55.129974 138377733605184 train_utils.py:377] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0423 17:46:55.751009 138377733605184 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0423 17:46:55.865396 138377733605184 checkpointing.py:688] Setting up checkpoint logger... I0423 17:46:55.865517 138377733605184 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0423 17:46:55.865567 138377733605184 pytree_checkpoint_handler.py:589] save_device_host_concurrent_bytes=None I0423 17:46:55.865817 138377733605184 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 0x7dda243ae9f0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0423 17:46:58.778538 138377733605184 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0423 17:46:58.778780 138377733605184 checkpoint_manager.py:709] [process=6][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7dc71b8b2240>}, handler_registry=None I0423 17:46:58.779016 138377733605184 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7dc71b8b2240>` for item "items" and save args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>` to `_handler_registry`. I0423 17:46:58.779065 138377733605184 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7dc71b8b0170>` for item "metrics" and save args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>` to `_handler_registry`. I0423 17:46:58.779115 138377733605184 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 0x7dc71b8b2240>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7dc71b8b2240>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7dc71b8b0170>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7dc71b8b0170>}). I0423 17:46:58.779454 138377733605184 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.33 I0423 17:46:58.779531 138377733605184 async_checkpointer.py:177] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7dc71b410f40> timeout: 600 secs and primary_host=0 for async checkpoint writes I0423 17:46:59.515782 138377733605184 checkpoint_manager.py:1818] Found 0 checkpoint steps in gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/nnx_xpk_feat_nnx_set_defaults_true_20260423_155242_07_eval/checkpoints I0423 17:46:59.532068 138377733605184 checkpoint_manager.py:929] [process=6][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/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/nnx_xpk_feat_nnx_set_defaults_true_20260423_155242_07_eval/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7dc71b3a1a00> I0423 17:46:59.532213 138377733605184 checkpointing.py:302] Checkpoint manager created! I0423 17:47:00.484956 138377733605184 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0423 17:47:00.485082 138377733605184 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0423 17:47:01.961406 138377733605184 maxtext_utils.py:1749] decoder/decoder_norm/scale/value Shape: float32[2048] Physical: (None,) I0423 17:47:01.961528 138377733605184 maxtext_utils.py:1749] decoder/layers/mlp/wi_0/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0423 17:47:01.961592 138377733605184 maxtext_utils.py:1749] decoder/layers/mlp/wi_1/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0423 17:47:01.961638 138377733605184 maxtext_utils.py:1749] decoder/layers/mlp/wo/kernel/value Shape: float32[7168,16,2048] Physical: (None, None, 'fsdp') I0423 17:47:01.961675 138377733605184 maxtext_utils.py:1749] decoder/layers/post_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0423 17:47:01.961709 138377733605184 maxtext_utils.py:1749] decoder/layers/pre_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0423 17:47:01.961746 138377733605184 maxtext_utils.py:1749] decoder/layers/self_attention/key/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0423 17:47:01.961782 138377733605184 maxtext_utils.py:1749] decoder/layers/self_attention/out/kernel/value Shape: float32[16,16,128,2048] Physical: (None, None, None, 'fsdp') I0423 17:47:01.961819 138377733605184 maxtext_utils.py:1749] decoder/layers/self_attention/query/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0423 17:47:01.961854 138377733605184 maxtext_utils.py:1749] decoder/layers/self_attention/value/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0423 17:47:01.961891 138377733605184 maxtext_utils.py:1749] decoder/logits_dense/kernel/value Shape: float32[2048,32000] Physical: ('fsdp', None) I0423 17:47:01.961925 138377733605184 maxtext_utils.py:1749] token_embedder/embedding/value Shape: float32[32000,2048] Physical: (None, 'fsdp') I0423 17:47:02.354916 138377733605184 nnx_decoders.py:616] nnx_decoders/carry Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0423 17:47:02.355071 138377733605184 nnx_decoders.py:616] nnx_decoders/carry Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 17:47:02.360446 138377733605184 nnx_decoders.py:616] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0423 17:47:02.360542 138377733605184 nnx_decoders.py:616] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 17:47:02.520915 138377733605184 attentions.py:1084] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 17:47:02.521052 138377733605184 attentions.py:1084] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 17:47:02.679245 138377733605184 attentions.py:1085] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 17:47:02.679387 138377733605184 attentions.py:1085] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 17:47:02.846929 138377733605184 attentions.py:1150] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 17:47:02.847072 138377733605184 attentions.py:1150] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 17:47:03.006274 138377733605184 attentions.py:1151] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 17:47:03.006436 138377733605184 attentions.py:1151] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 17:47:03.165891 138377733605184 attentions.py:1152] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 17:47:03.166024 138377733605184 attentions.py:1152] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 17:47:03.336242 138377733605184 attentions.py:1193] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0423 17:47:03.336392 138377733605184 attentions.py:1193] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 17:47:03.358921 138377733605184 linears.py:541] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0423 17:47:03.359020 138377733605184 linears.py:541] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0423 17:47:14.217751 138377733605184 max_utils.py:791] Total memory size: 1.5 GB, Output size: 0.4 GB, Temp size: 1.1 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB. I0423 17:47:14.220176 138377733605184 metric_logger.py:289] number parameters: 1.104 billion I0423 17:47:25.687629 138377733605184 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0423 17:47:25.841023 138377733605184 checkpointing.py:798] Waited 0.1533811092376709 seconds for step 0 to finish before starting checkpointing. I0423 17:47:25.843225 138377733605184 checkpoint_manager.py:2013] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 17:47:25.845033 138377733605184 checkpoint_manager.py:1518] [process=6] Saving checkpoint at step 0 I0423 17:47:25.847844 138377733605184 async_checkpointer.py:452] [process=6] Started async saving checkpoint to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/nnx_xpk_feat_nnx_set_defaults_true_20260423_155242_07_eval/checkpoints/0. I0423 17:47:26.665574 138377733605184 signaling_client.py:364] Using JaxDistributedSignalingClient I0423 17:47:26.666550 138377733605184 jax_array_handlers.py:358] Scheduling D2H of 69 prioritized jax.Array. I0423 17:47:26.666616 138377733605184 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False I0423 17:47:26.918534 138377733605184 base_pytree_checkpoint_handler.py:153] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.254092s I0423 17:47:26.918731 138377733605184 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.975 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.5184614658355713 s) (per-host) I0423 17:47:26.918795 138377733605184 base_pytree_checkpoint_handler.py:737] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.518534s (batch_requests_ready=0.257836s, total_serialization_initiated=0.260614s, others=0.000084s) I0423 17:47:26.918915 138377733605184 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.522659s (all_items=0.000022s, per_item={'items': '0.00002170'}, temp_paths=0.522637) I0423 17:47:26.919921 138258612741888 async_checkpointer.py:79] [process=6][thread=async_save] Background save thread started. I0423 17:47:26.920106 138377733605184 async_checkpointer.py:561] Finished blocking save. Time taken: 1.074991s. Continuing background save to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/nnx_xpk_feat_nnx_set_defaults_true_20260423_155242_07_eval/checkpoints/0. I0423 17:47:26.933927 138377733605184 checkpoint_manager.py:1566] [process=6][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0423 17:47:26.934259 138254292596480 async_checkpointer.py:265] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0423 17:47:26.934421 138377733605184 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/nnx_xpk_feat_nnx_set_defaults_true_20260423_155242_07_eval/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776966445.8432074, 'wait_for_prev_duration_secs': 6.580352783203125e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776966445.8450713, 'checkpointer_blocking_duration_secs': 1.0751426219940186, 'get_old_steps_start_time': 1776966446.920233, 'get_old_steps_duration_secs': 2.4557113647460938e-05, 'checkpoint_manager_blocking_start_time': 1776966445.8414571, 'checkpoint_manager_blocking_duration_secs': 1.0929276943206787} I0423 17:47:26.934530 138377733605184 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0423 17:47:26.934602 138377733605184 max_utils.py:750] Memstats: After params initialized: I0423 17:47:26.934652 138377733605184 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0)) I0423 17:47:26.934685 138377733605184 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0)) I0423 17:47:26.934713 138377733605184 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0)) I0423 17:47:26.934737 138377733605184 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0)) I0423 17:47:27.205747 138377733605184 metric_logger.py:185] completed step: 0, seconds: 11.466, TFLOP/s/device: 1.185, Tokens/s/device: 178.609, total_weights: 65536, loss: 10.874 I0423 17:47:27.374483 138377733605184 metric_logger.py:185] completed step: 1, seconds: 1.516, TFLOP/s/device: 8.960, Tokens/s/device: 1350.597, total_weights: 65536, loss: 10.874 I0423 17:47:27.802597 138377733605184 metric_logger.py:185] completed step: 2, seconds: 0.023, TFLOP/s/device: 589.694, Tokens/s/device: 88885.031, total_weights: 65536, loss: 10.262 I0423 17:47:27.949958 138377733605184 metric_logger.py:185] completed step: 3, seconds: 0.419, TFLOP/s/device: 32.402, Tokens/s/device: 4883.970, total_weights: 65536, loss: 9.732 I0423 17:47:28.245687 138377733605184 metric_logger.py:185] completed step: 4, seconds: 0.163, TFLOP/s/device: 83.562, Tokens/s/device: 12595.403, total_weights: 65536, loss: 9.274 I0423 17:47:28.253119 138377733605184 metric_logger.py:185] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.557, Tokens/s/device: 13951.144, total_weights: 65536, loss: 8.888 I0423 17:47:47.067291 138377733605184 metric_logger.py:185] completed step: 6, seconds: 0.296, TFLOP/s/device: 45.845, Tokens/s/device: 6910.304, total_weights: 65536, loss: 8.589 I0423 17:47:47.214620 138377733605184 metric_logger.py:185] completed step: 7, seconds: 18.668, TFLOP/s/device: 0.728, Tokens/s/device: 109.705, total_weights: 65536, loss: 8.380 I0423 17:47:47.362119 138377733605184 metric_logger.py:185] completed step: 8, seconds: 0.153, TFLOP/s/device: 88.662, Tokens/s/device: 13364.046, total_weights: 65536, loss: 8.251 I0423 17:47:47.510571 138377733605184 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0423 17:47:47.511195 138377733605184 checkpointing.py:798] Waited 0.0006356239318847656 seconds for step 9 to finish before starting checkpointing. I0423 17:47:47.513118 138377733605184 checkpoint_manager.py:2024] [process=6][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 17:47:48.182129 2562 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0423 17:47:50.123223 138258621134592 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/nnx_xpk_feat_nnx_set_defaults_true_20260423_155242_07_eval/checkpoints/0/items/array_metadatas/process_6 I0423 17:48:25.351716 138258612741888 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/gbytes_per_sec: 26.795 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 58.95141243934631 s) (per-host) I0423 17:48:25.351824 138258612741888 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 58.431791s. I0423 17:48:30.646273 138258612741888 async_checkpointer.py:144] [process=6][thread=async_save] Background save thread done. Time taken: 63.726222s. I0423 17:48:30.646581 138254292596480 async_checkpointer.py:273] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 17:48:30.646696 138254292596480 async_checkpointer.py:283] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0423 17:48:30.646761 138254292596480 checkpoint_manager.py:2133] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0423 17:48:30.648259 138254292596480 checkpoint_manager.py:2142] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0423 17:48:30.648389 138377733605184 checkpoint_manager.py:2036] [process=6][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0. W0423 17:48:30.648474 138377733605184 checkpoint_manager.py:1458] Waiting for previous save to complete took 43.135373 seconds. If this number is high, consider checkpointing less frequently. I0423 17:48:30.650703 138377733605184 checkpoint_manager.py:1518] [process=6] Saving checkpoint at step 9 I0423 17:48:30.654196 138377733605184 async_checkpointer.py:452] [process=6] Started async saving checkpoint to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/nnx_xpk_feat_nnx_set_defaults_true_20260423_155242_07_eval/checkpoints/9. I0423 17:48:31.213840 138377733605184 jax_array_handlers.py:358] Scheduling D2H of 69 prioritized jax.Array. I0423 17:48:31.214002 138377733605184 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False I0423 17:48:31.263141 138377733605184 base_pytree_checkpoint_handler.py:153] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.051299s I0423 17:48:31.263314 138377733605184 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/blocking_gbytes_per_sec: 4.872 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.3166055679321289 s) (per-host) I0423 17:48:31.263363 138377733605184 base_pytree_checkpoint_handler.py:737] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.316664s (batch_requests_ready=0.260597s, total_serialization_initiated=0.056000s, others=0.000067s) I0423 17:48:31.263455 138377733605184 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.320814s (all_items=0.000015s, per_item={'items': '0.00001550'}, temp_paths=0.320799) I0423 17:48:31.264284 138254821881600 async_checkpointer.py:79] [process=6][thread=async_save] Background save thread started. I0423 17:48:31.264444 138377733605184 async_checkpointer.py:561] Finished blocking save. Time taken: 0.613672s. Continuing background save to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/nnx_xpk_feat_nnx_set_defaults_true_20260423_155242_07_eval/checkpoints/9. I0423 17:48:31.266220 138377733605184 checkpoint_manager.py:1566] [process=6][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0423 17:48:31.266426 138254292596480 async_checkpointer.py:265] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0423 17:48:31.266520 138377733605184 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/nnx_xpk_feat_nnx_set_defaults_true_20260423_155242_07_eval/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776966467.513076, 'wait_for_prev_duration_secs': 43.13537263870239, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776966510.6507447, 'checkpointer_blocking_duration_secs': 0.613806962966919, 'get_old_steps_start_time': 1776966511.2645712, 'get_old_steps_duration_secs': 2.5033950805664062e-05, 'checkpoint_manager_blocking_start_time': 1776966467.511434, 'checkpoint_manager_blocking_duration_secs': 43.755056858062744} I0423 17:48:31.266680 138377733605184 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0423 17:48:31.266725 138377733605184 checkpoint_manager.py:2024] [process=6][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 17:48:36.884409 138258621134592 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/nnx_xpk_feat_nnx_set_defaults_true_20260423_155242_07_eval/checkpoints/9/items/array_metadatas/process_6 I0423 17:49:13.226134 138254821881600 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/gbytes_per_sec: 37.361 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.27939295768738 s) (per-host) I0423 17:49:13.226237 138254821881600 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.961836s. I0423 17:49:22.145399 138254821881600 async_checkpointer.py:144] [process=6][thread=async_save] Background save thread done. Time taken: 50.880982s. I0423 17:49:22.145778 138254292596480 async_checkpointer.py:273] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 17:49:22.145839 138254292596480 async_checkpointer.py:283] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0423 17:49:22.145903 138254292596480 checkpoint_manager.py:2133] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0423 17:49:22.147367 138254292596480 checkpoint_manager.py:2142] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0423 17:49:22.147523 138377733605184 checkpoint_manager.py:2036] [process=6][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9. I0423 17:49:22.147707 138377733605184 checkpoint_manager.py:2013] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 17:49:22.148374 138377733605184 metric_logger.py:185] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.507, Tokens/s/device: 13943.735, total_weights: 65536, loss: 8.175 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Thu Apr 23 17:49:35 UTC 2026 EXIT_CODE=0