XPK Start: Fri Apr 24 16:37:32 UTC 2026 2026-04-24 16:37:36.995617: 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 00:00:1777048657.008487 10 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered E0000 00:00:1777048657.012154 10 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered W0000 00:00:1777048657.023417 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1777048657.023438 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1777048657.023441 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1777048657.023443 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. 2026-04-24 16:37:56.323290: 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) I0424 16:37:56.848196 135782581499712 max_utils.py:273] Attempting to initialize the jax distributed system... INFO:2026-04-24 16:38:05,890:jax._src.distributed:140: Starting JAX distributed service on [::]:8482 I0424 16:38:05.890020 135782581499712 distributed.py:140] Starting JAX distributed service on [::]:8482 INFO:2026-04-24 16:38:05,892:jax._src.distributed:157: Connecting to JAX distributed service on mt-04-int8-ahjnk-slice-job-0-0.mt-04-int8-ahjnk:8482 I0424 16:38:05.892305 135782581499712 distributed.py:157] Connecting to JAX distributed service on mt-04-int8-ahjnk-slice-job-0-0.mt-04-int8-ahjnk:8482 I0424 16:38:06.831428 135782581499712 max_utils.py:284] Jax distributed system initialized! I0424 16:38:13.734303 135782581499712 max_utils.py:800] System Information: Jax Version: 0.8.1 I0424 16:38:13.734409 135782581499712 max_utils.py:801] System Information: Jaxlib Version: 0.8.1 I0424 16:38:13.734451 135782581499712 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 I0424 16:38:13.734486 135782581499712 train_utils.py:377] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0424 16:38:14.362946 135782581499712 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0424 16:38:14.929205 135782581499712 checkpointing.py:688] Setting up checkpoint logger... I0424 16:38:14.929330 135782581499712 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0424 16:38:14.929377 135782581499712 pytree_checkpoint_handler.py:589] save_device_host_concurrent_bytes=None I0424 16:38:14.929587 135782581499712 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 0x7b7dd9b79160>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0424 16:38:17.847771 135782581499712 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0424 16:38:17.848141 135782581499712 checkpoint_manager.py:709] [process=5][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7b6ab209efc0>}, handler_registry=None I0424 16:38:17.848381 135782581499712 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7b6ab209efc0>` 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`. I0424 16:38:17.848430 135782581499712 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7b6ab0aa4620>` 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`. I0424 16:38:17.848465 135782581499712 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 0x7b6ab209efc0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7b6ab209efc0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7b6ab0aa4620>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7b6ab0aa4620>}). I0424 16:38:17.848823 135782581499712 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.33 I0424 16:38:17.848900 135782581499712 async_checkpointer.py:177] [process=5][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7b6980380cc0> timeout: 600 secs and primary_host=0 for async checkpoint writes I0424 16:38:18.791278 135782581499712 checkpoint_manager.py:1818] Found 0 checkpoint steps in gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/nnx_xpk_feat_nnx_set_defaults_true_20260424_145744_04_int8/checkpoints I0424 16:38:18.819868 135782581499712 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=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_20260424_145744/nnx_xpk_feat_nnx_set_defaults_true_20260424_145744_04_int8/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7b6ab0aa7230> I0424 16:38:18.820041 135782581499712 checkpointing.py:302] Checkpoint manager created! I0424 16:38:20.284691 135782581499712 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0424 16:38:20.284815 135782581499712 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0424 16:38:22.675906 135782581499712 maxtext_utils.py:1749] decoder/decoder_norm/scale/value Shape: float32[2048] Physical: (None,) I0424 16:38:22.676032 135782581499712 maxtext_utils.py:1749] decoder/layers/mlp/wi_0/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0424 16:38:22.676090 135782581499712 maxtext_utils.py:1749] decoder/layers/mlp/wi_1/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0424 16:38:22.676135 135782581499712 maxtext_utils.py:1749] decoder/layers/mlp/wo/kernel/value Shape: float32[7168,16,2048] Physical: (None, None, 'fsdp') I0424 16:38:22.676173 135782581499712 maxtext_utils.py:1749] decoder/layers/post_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0424 16:38:22.676217 135782581499712 maxtext_utils.py:1749] decoder/layers/pre_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0424 16:38:22.676255 135782581499712 maxtext_utils.py:1749] decoder/layers/self_attention/key/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0424 16:38:22.676292 135782581499712 maxtext_utils.py:1749] decoder/layers/self_attention/out/kernel/value Shape: float32[16,16,128,2048] Physical: (None, None, None, 'fsdp') I0424 16:38:22.676327 135782581499712 maxtext_utils.py:1749] decoder/layers/self_attention/query/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0424 16:38:22.676362 135782581499712 maxtext_utils.py:1749] decoder/layers/self_attention/value/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0424 16:38:22.676395 135782581499712 maxtext_utils.py:1749] decoder/logits_dense/kernel/value Shape: float32[2048,32000] Physical: ('fsdp', None) I0424 16:38:22.676428 135782581499712 maxtext_utils.py:1749] token_embedder/embedding/value Shape: float32[32000,2048] Physical: (None, 'fsdp') I0424 16:38:23.086730 135782581499712 nnx_decoders.py:616] nnx_decoders/carry Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0424 16:38:23.086887 135782581499712 nnx_decoders.py:616] nnx_decoders/carry Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0424 16:38:23.092332 135782581499712 nnx_decoders.py:616] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0424 16:38:23.092424 135782581499712 nnx_decoders.py:616] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0424 16:38:23.242833 135782581499712 attentions.py:1084] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0424 16:38:23.242963 135782581499712 attentions.py:1084] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0424 16:38:23.392450 135782581499712 attentions.py:1085] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0424 16:38:23.392580 135782581499712 attentions.py:1085] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0424 16:38:23.598876 135782581499712 attentions.py:1150] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0424 16:38:23.599012 135782581499712 attentions.py:1150] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 16:38:23.748586 135782581499712 attentions.py:1151] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0424 16:38:23.748749 135782581499712 attentions.py:1151] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 16:38:23.899939 135782581499712 attentions.py:1152] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0424 16:38:23.900068 135782581499712 attentions.py:1152] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 16:38:24.065811 135782581499712 attentions.py:1193] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0424 16:38:24.065953 135782581499712 attentions.py:1193] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 16:38:24.567781 135782581499712 linears.py:541] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0424 16:38:24.567906 135782581499712 linears.py:541] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0424 16:38:38.404380 135782581499712 max_utils.py:791] Total memory size: 1.8 GB, Output size: 0.4 GB, Temp size: 1.4 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB. I0424 16:38:38.408007 135782581499712 metric_logger.py:289] number parameters: 1.104 billion I0424 16:38:52.717057 135782581499712 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0424 16:38:52.952586 135782581499712 checkpointing.py:798] Waited 0.23551487922668457 seconds for step 0 to finish before starting checkpointing. I0424 16:38:52.955138 135782581499712 checkpoint_manager.py:2013] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0424 16:38:52.957281 135782581499712 checkpoint_manager.py:1518] [process=5] Saving checkpoint at step 0 I0424 16:38:52.960049 135782581499712 async_checkpointer.py:452] [process=5] Started async saving checkpoint to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/nnx_xpk_feat_nnx_set_defaults_true_20260424_145744_04_int8/checkpoints/0. I0424 16:38:53.715606 135782581499712 signaling_client.py:364] Using JaxDistributedSignalingClient I0424 16:38:53.716684 135782581499712 jax_array_handlers.py:358] Scheduling D2H of 111 prioritized jax.Array. I0424 16:38:53.716744 135782581499712 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 I0424 16:38:53.964204 135782581499712 base_pytree_checkpoint_handler.py:153] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.251129s I0424 16:38:53.964371 135782581499712 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.900 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.5319511890411377 s) (per-host) I0424 16:38:53.964422 135782581499712 base_pytree_checkpoint_handler.py:737] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.532013s (batch_requests_ready=0.270648s, total_serialization_initiated=0.261296s, others=0.000069s) I0424 16:38:53.964537 135782581499712 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.536196s (all_items=0.000020s, per_item={'items': '0.00002003'}, temp_paths=0.536175) I0424 16:38:53.965576 135660325283584 async_checkpointer.py:79] [process=5][thread=async_save] Background save thread started. I0424 16:38:53.965713 135782581499712 async_checkpointer.py:561] Finished blocking save. Time taken: 1.008362s. Continuing background save to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/nnx_xpk_feat_nnx_set_defaults_true_20260424_145744_04_int8/checkpoints/0. I0424 16:38:53.979022 135782581499712 checkpoint_manager.py:1566] [process=5][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0424 16:38:53.979314 135651215263488 async_checkpointer.py:265] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0424 16:38:53.979467 135782581499712 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/nnx_xpk_feat_nnx_set_defaults_true_20260424_145744_04_int8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777048732.9551218, 'wait_for_prev_duration_secs': 6.29425048828125e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777048732.9573185, 'checkpointer_blocking_duration_secs': 1.0085723400115967, 'get_old_steps_start_time': 1777048733.9659104, 'get_old_steps_duration_secs': 2.574920654296875e-05, 'checkpoint_manager_blocking_start_time': 1777048732.9530697, 'checkpoint_manager_blocking_duration_secs': 1.0263597965240479} I0424 16:38:53.979581 135782581499712 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0424 16:38:53.979671 135782581499712 max_utils.py:750] Memstats: After params initialized: I0424 16:38:53.979720 135782581499712 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_18(process=5,(2,4,0,0)) I0424 16:38:53.979753 135782581499712 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_19(process=5,(3,4,0,0)) I0424 16:38:53.979779 135782581499712 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_22(process=5,(2,5,0,0)) I0424 16:38:53.979803 135782581499712 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_23(process=5,(3,5,0,0)) I0424 16:38:54.255190 135782581499712 metric_logger.py:185] completed step: 0, seconds: 14.307, TFLOP/s/device: 0.950, Tokens/s/device: 143.144, total_weights: 65536, loss: 10.872 I0424 16:38:54.495378 135782581499712 metric_logger.py:185] completed step: 1, seconds: 1.536, TFLOP/s/device: 8.849, Tokens/s/device: 1333.764, total_weights: 65536, loss: 10.872 I0424 16:38:54.950056 135782581499712 metric_logger.py:185] completed step: 2, seconds: 0.017, TFLOP/s/device: 820.132, Tokens/s/device: 123619.243, total_weights: 65536, loss: 10.258 I0424 16:38:55.179148 135782581499712 metric_logger.py:185] completed step: 3, seconds: 0.434, TFLOP/s/device: 31.309, Tokens/s/device: 4719.166, total_weights: 65536, loss: 9.727 I0424 16:38:55.638435 135782581499712 metric_logger.py:185] completed step: 4, seconds: 0.254, TFLOP/s/device: 53.466, Tokens/s/device: 8059.026, total_weights: 65536, loss: 9.270 I0424 16:38:55.647003 135782581499712 metric_logger.py:185] completed step: 5, seconds: 0.229, TFLOP/s/device: 59.311, Tokens/s/device: 8939.991, total_weights: 65536, loss: 8.884 I0424 16:39:17.232557 135782581499712 metric_logger.py:185] completed step: 6, seconds: 0.459, TFLOP/s/device: 29.580, Tokens/s/device: 4458.600, total_weights: 65536, loss: 8.584 I0424 16:39:17.461641 135782581499712 metric_logger.py:185] completed step: 7, seconds: 21.359, TFLOP/s/device: 0.636, Tokens/s/device: 95.883, total_weights: 65536, loss: 8.376 I0424 16:39:17.690683 135782581499712 metric_logger.py:185] completed step: 8, seconds: 0.235, TFLOP/s/device: 57.854, Tokens/s/device: 8720.460, total_weights: 65536, loss: 8.247 I0424 16:39:17.921494 135782581499712 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0424 16:39:17.922395 135782581499712 checkpointing.py:798] Waited 0.0009131431579589844 seconds for step 9 to finish before starting checkpointing. I0424 16:39:17.924755 135782581499712 checkpoint_manager.py:2024] [process=5][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0424 16:39:18.308331 2805 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0424 16:39:20.243624 135660333676288 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 111 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/nnx_xpk_feat_nnx_set_defaults_true_20260424_145744_04_int8/checkpoints/0/items/array_metadatas/process_5 I0424 16:39:49.043657 135660325283584 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/gbytes_per_sec: 28.404 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 55.61118698120117 s) (per-host) I0424 16:39:49.043767 135660325283584 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 55.077977s. I0424 16:39:56.820835 135660325283584 async_checkpointer.py:144] [process=5][thread=async_save] Background save thread done. Time taken: 62.855027s. I0424 16:39:56.821148 135651215263488 async_checkpointer.py:273] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0424 16:39:56.821286 135651215263488 async_checkpointer.py:283] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0424 16:39:56.821341 135651215263488 checkpoint_manager.py:2133] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0424 16:39:56.822690 135651215263488 checkpoint_manager.py:2142] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0424 16:39:56.822869 135782581499712 checkpoint_manager.py:2036] [process=5][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0. W0424 16:39:56.823020 135782581499712 checkpoint_manager.py:1458] Waiting for previous save to complete took 38.898269 seconds. If this number is high, consider checkpointing less frequently. I0424 16:39:56.824919 135782581499712 checkpoint_manager.py:1518] [process=5] Saving checkpoint at step 9 I0424 16:39:56.828374 135782581499712 async_checkpointer.py:452] [process=5] Started async saving checkpoint to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/nnx_xpk_feat_nnx_set_defaults_true_20260424_145744_04_int8/checkpoints/9. I0424 16:39:57.385959 135782581499712 jax_array_handlers.py:358] Scheduling D2H of 111 prioritized jax.Array. I0424 16:39:57.386071 135782581499712 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 I0424 16:39:57.432712 135782581499712 base_pytree_checkpoint_handler.py:153] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.050152s I0424 16:39:57.432882 135782581499712 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/blocking_gbytes_per_sec: 4.821 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.31998205184936523 s) (per-host) I0424 16:39:57.432933 135782581499712 base_pytree_checkpoint_handler.py:737] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.320045s (batch_requests_ready=0.261650s, total_serialization_initiated=0.058326s, others=0.000070s) I0424 16:39:57.433058 135782581499712 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.324099s (all_items=0.000015s, per_item={'items': '0.00001454'}, temp_paths=0.324084) I0424 16:39:57.433887 135654461667072 async_checkpointer.py:79] [process=5][thread=async_save] Background save thread started. I0424 16:39:57.434054 135782581499712 async_checkpointer.py:561] Finished blocking save. Time taken: 0.609064s. Continuing background save to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/nnx_xpk_feat_nnx_set_defaults_true_20260424_145744_04_int8/checkpoints/9. I0424 16:39:57.709425 135782581499712 checkpoint_manager.py:1566] [process=5][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0424 16:39:57.709815 135651215263488 async_checkpointer.py:265] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0424 16:39:57.710006 135782581499712 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/nnx_xpk_feat_nnx_set_defaults_true_20260424_145744_04_int8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777048757.9247258, 'wait_for_prev_duration_secs': 38.898269176483154, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777048796.8249574, 'checkpointer_blocking_duration_secs': 0.6092042922973633, 'get_old_steps_start_time': 1777048797.4341793, 'get_old_steps_duration_secs': 2.7894973754882812e-05, 'checkpoint_manager_blocking_start_time': 1777048757.9226904, 'checkpoint_manager_blocking_duration_secs': 39.787277936935425} I0424 16:39:57.710132 135782581499712 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0424 16:39:57.710177 135782581499712 checkpoint_manager.py:2024] [process=5][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0424 16:40:02.400304 135660333676288 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 111 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/nnx_xpk_feat_nnx_set_defaults_true_20260424_145744_04_int8/checkpoints/9/items/array_metadatas/process_5 I0424 16:40:39.292455 135654461667072 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/gbytes_per_sec: 37.449 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.179516553878784 s) (per-host) I0424 16:40:39.292577 135654461667072 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.858569s. I0424 16:40:47.609314 135654461667072 async_checkpointer.py:144] [process=5][thread=async_save] Background save thread done. Time taken: 50.175292s. I0424 16:40:47.609537 135651215263488 async_checkpointer.py:273] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0424 16:40:47.609597 135651215263488 async_checkpointer.py:283] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0424 16:40:47.609680 135651215263488 checkpoint_manager.py:2133] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0424 16:40:47.611679 135651215263488 checkpoint_manager.py:2142] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0424 16:40:47.611857 135782581499712 checkpoint_manager.py:2036] [process=5][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9. I0424 16:40:47.612042 135782581499712 checkpoint_manager.py:2013] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0424 16:40:47.612671 135782581499712 metric_logger.py:185] completed step: 9, seconds: 0.229, TFLOP/s/device: 59.350, Tokens/s/device: 8945.849, total_weights: 65536, loss: 8.171 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Fri Apr 24 16:40:58 UTC 2026 EXIT_CODE=0