XPK Start: Wed Apr 22 18:05:18 UTC 2026 2026-04-22 18:05:22.890217: 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 00:00:1776881122.902807 9 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered E0000 00:00:1776881122.906520 9 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered W0000 00:00:1776881122.917832 9 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776881122.917850 9 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776881122.917852 9 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776881122.917854 9 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. 2026-04-22 18:05:42.014001: 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) I0422 18:05:42.539312 139822767720256 max_utils.py:273] Attempting to initialize the jax distributed system... INFO:2026-04-22 18:05:51,581:jax._src.distributed:140: Starting JAX distributed service on [::]:8482 I0422 18:05:51.581805 139822767720256 distributed.py:140] Starting JAX distributed service on [::]:8482 INFO:2026-04-22 18:05:51,584:jax._src.distributed:157: Connecting to JAX distributed service on mt-11-optimizer-offload-u5k4m-slice-job-0-0.mt-11-optimizer-offload-u5k4m:8482 I0422 18:05:51.584128 139822767720256 distributed.py:157] Connecting to JAX distributed service on mt-11-optimizer-offload-u5k4m-slice-job-0-0.mt-11-optimizer-offload-u5k4m:8482 I0422 18:05:52.687694 139822767720256 max_utils.py:284] Jax distributed system initialized! I0422 18:05:59.571157 139822767720256 max_utils.py:800] System Information: Jax Version: 0.8.1 I0422 18:05:59.571266 139822767720256 max_utils.py:801] System Information: Jaxlib Version: 0.8.1 I0422 18:05:59.571307 139822767720256 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 I0422 18:05:59.571342 139822767720256 train_utils.py:377] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0422 18:06:00.188851 139822767720256 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0422 18:06:00.301725 139822767720256 checkpointing.py:688] Setting up checkpoint logger... I0422 18:06:00.301841 139822767720256 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0422 18:06:00.301887 139822767720256 pytree_checkpoint_handler.py:589] save_device_host_concurrent_bytes=None I0422 18:06:00.302093 139822767720256 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 0x7f2a7d9752b0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0422 18:06:03.698580 139822767720256 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0422 18:06:03.698959 139822767720256 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 0x7f15d836a840>}, handler_registry=None I0422 18:06:03.699195 139822767720256 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7f15d836a840>` 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`. I0422 18:06:03.699251 139822767720256 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7f170152f5f0>` 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`. I0422 18:06:03.699288 139822767720256 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 0x7f15d836a840>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7f15d836a840>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7f170152f5f0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7f170152f5f0>}). I0422 18:06:03.699624 139822767720256 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.33 I0422 18:06:03.699713 139822767720256 async_checkpointer.py:177] [process=5][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7f15d8334f40> timeout: 600 secs and primary_host=0 for async checkpoint writes I0422 18:06:04.475536 139822767720256 checkpoint_manager.py:1818] Found 0 checkpoint steps in gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260422_154647/nnx_xpk_feat_nnx_set_defaults_true_20260422_154647_11_optimizer_offload_false/checkpoints I0422 18:06:05.308288 139822767720256 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_20260422_154647/nnx_xpk_feat_nnx_set_defaults_true_20260422_154647_11_optimizer_offload_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7f1701e99580> I0422 18:06:05.308466 139822767720256 checkpointing.py:302] Checkpoint manager created! I0422 18:06:06.239271 139822767720256 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0422 18:06:06.239388 139822767720256 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0422 18:06:07.652014 139822767720256 maxtext_utils.py:1749] decoder/decoder_norm/scale/value Shape: float32[2048] Physical: (None,) I0422 18:06:07.652133 139822767720256 maxtext_utils.py:1749] decoder/layers/mlp/wi_0/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0422 18:06:07.652188 139822767720256 maxtext_utils.py:1749] decoder/layers/mlp/wi_1/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0422 18:06:07.652237 139822767720256 maxtext_utils.py:1749] decoder/layers/mlp/wo/kernel/value Shape: float32[7168,16,2048] Physical: (None, None, 'fsdp') I0422 18:06:07.652276 139822767720256 maxtext_utils.py:1749] decoder/layers/post_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0422 18:06:07.652311 139822767720256 maxtext_utils.py:1749] decoder/layers/pre_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0422 18:06:07.652348 139822767720256 maxtext_utils.py:1749] decoder/layers/self_attention/key/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0422 18:06:07.652384 139822767720256 maxtext_utils.py:1749] decoder/layers/self_attention/out/kernel/value Shape: float32[16,16,128,2048] Physical: (None, None, None, 'fsdp') I0422 18:06:07.652419 139822767720256 maxtext_utils.py:1749] decoder/layers/self_attention/query/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0422 18:06:07.652454 139822767720256 maxtext_utils.py:1749] decoder/layers/self_attention/value/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0422 18:06:07.652487 139822767720256 maxtext_utils.py:1749] decoder/logits_dense/kernel/value Shape: float32[2048,32000] Physical: ('fsdp', None) I0422 18:06:07.652520 139822767720256 maxtext_utils.py:1749] token_embedder/embedding/value Shape: float32[32000,2048] Physical: (None, 'fsdp') I0422 18:06:08.051319 139822767720256 nnx_decoders.py:616] nnx_decoders/carry Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0422 18:06:08.051463 139822767720256 nnx_decoders.py:616] nnx_decoders/carry Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0422 18:06:08.056804 139822767720256 nnx_decoders.py:616] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0422 18:06:08.056898 139822767720256 nnx_decoders.py:616] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0422 18:06:08.199504 139822767720256 attentions.py:1084] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0422 18:06:08.199635 139822767720256 attentions.py:1084] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0422 18:06:08.343463 139822767720256 attentions.py:1085] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0422 18:06:08.343594 139822767720256 attentions.py:1085] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0422 18:06:08.493990 139822767720256 attentions.py:1150] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0422 18:06:08.494159 139822767720256 attentions.py:1150] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0422 18:06:08.634742 139822767720256 attentions.py:1151] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0422 18:06:08.634871 139822767720256 attentions.py:1151] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0422 18:06:08.775809 139822767720256 attentions.py:1152] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0422 18:06:08.775940 139822767720256 attentions.py:1152] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0422 18:06:08.928224 139822767720256 attentions.py:1193] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0422 18:06:08.928358 139822767720256 attentions.py:1193] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0422 18:06:08.950567 139822767720256 linears.py:541] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0422 18:06:08.950693 139822767720256 linears.py:541] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0422 18:06:20.113242 139822767720256 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. I0422 18:06:20.115715 139822767720256 metric_logger.py:289] number parameters: 1.104 billion I0422 18:06:31.211232 139822767720256 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0422 18:06:31.363187 139822767720256 checkpointing.py:798] Waited 0.15194225311279297 seconds for step 0 to finish before starting checkpointing. I0422 18:06:31.365531 139822767720256 checkpoint_manager.py:2013] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0422 18:06:31.367248 139822767720256 checkpoint_manager.py:1518] [process=5] Saving checkpoint at step 0 I0422 18:06:31.369887 139822767720256 async_checkpointer.py:452] [process=5] Started async saving checkpoint to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260422_154647/nnx_xpk_feat_nnx_set_defaults_true_20260422_154647_11_optimizer_offload_false/checkpoints/0. I0422 18:06:32.376491 139822767720256 signaling_client.py:364] Using JaxDistributedSignalingClient I0422 18:06:32.377470 139822767720256 jax_array_handlers.py:358] Scheduling D2H of 69 prioritized jax.Array. I0422 18:06:32.377529 139822767720256 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 I0422 18:06:32.625554 139822767720256 base_pytree_checkpoint_handler.py:153] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.250174s I0422 18:06:32.625740 139822767720256 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.955 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.5219957828521729 s) (per-host) I0422 18:06:32.625795 139822767720256 base_pytree_checkpoint_handler.py:737] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.522063s (batch_requests_ready=0.265369s, total_serialization_initiated=0.256619s, others=0.000075s) I0422 18:06:32.625892 139822767720256 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.526189s (all_items=0.000018s, per_item={'items': '0.00001836'}, temp_paths=0.526171) I0422 18:06:32.626837 139699414873856 async_checkpointer.py:79] [process=5][thread=async_save] Background save thread started. I0422 18:06:32.627014 139822767720256 async_checkpointer.py:561] Finished blocking save. Time taken: 1.259693s. Continuing background save to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260422_154647/nnx_xpk_feat_nnx_set_defaults_true_20260422_154647_11_optimizer_offload_false/checkpoints/0. I0422 18:06:32.657749 139822767720256 checkpoint_manager.py:1566] [process=5][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0422 18:06:32.658010 139694583035648 async_checkpointer.py:265] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0422 18:06:32.658141 139822767720256 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260422_154647/nnx_xpk_feat_nnx_set_defaults_true_20260422_154647_11_optimizer_offload_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776881191.3655138, 'wait_for_prev_duration_secs': 6.437301635742188e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776881191.3672867, 'checkpointer_blocking_duration_secs': 1.2598340511322021, 'get_old_steps_start_time': 1776881192.6271417, 'get_old_steps_duration_secs': 2.5510787963867188e-05, 'checkpoint_manager_blocking_start_time': 1776881191.3635752, 'checkpoint_manager_blocking_duration_secs': 1.2945282459259033} I0422 18:06:32.658253 139822767720256 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0422 18:06:32.658324 139822767720256 max_utils.py:750] Memstats: After params initialized: I0422 18:06:32.658376 139822767720256 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_18(process=5,(2,4,0,0)) I0422 18:06:32.658407 139822767720256 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_19(process=5,(3,4,0,0)) I0422 18:06:32.658435 139822767720256 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_22(process=5,(2,5,0,0)) I0422 18:06:32.658459 139822767720256 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_23(process=5,(3,5,0,0)) I0422 18:06:32.927673 139822767720256 metric_logger.py:185] completed step: 0, seconds: 11.094, TFLOP/s/device: 1.225, Tokens/s/device: 184.596, total_weights: 65536, loss: 10.874 I0422 18:06:33.107312 139822767720256 metric_logger.py:185] completed step: 1, seconds: 1.715, TFLOP/s/device: 7.924, Tokens/s/device: 1194.356, total_weights: 65536, loss: 10.874 I0422 18:06:33.984214 139822767720256 metric_logger.py:185] completed step: 2, seconds: 0.034, TFLOP/s/device: 402.343, Tokens/s/device: 60645.543, total_weights: 65536, loss: 10.262 I0422 18:06:34.131760 139822767720256 metric_logger.py:185] completed step: 3, seconds: 0.867, TFLOP/s/device: 15.670, Tokens/s/device: 2361.978, total_weights: 65536, loss: 9.732 I0422 18:06:34.427141 139822767720256 metric_logger.py:185] completed step: 4, seconds: 0.164, TFLOP/s/device: 83.063, Tokens/s/device: 12520.098, total_weights: 65536, loss: 9.274 I0422 18:06:34.434370 139822767720256 metric_logger.py:185] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.409, Tokens/s/device: 13928.846, total_weights: 65536, loss: 8.888 I0422 18:06:54.160999 139822767720256 metric_logger.py:185] completed step: 6, seconds: 0.296, TFLOP/s/device: 45.891, Tokens/s/device: 6917.260, total_weights: 65536, loss: 8.589 I0422 18:06:54.308537 139822767720256 metric_logger.py:185] completed step: 7, seconds: 19.580, TFLOP/s/device: 0.694, Tokens/s/device: 104.595, total_weights: 65536, loss: 8.380 I0422 18:06:54.458675 139822767720256 metric_logger.py:185] completed step: 8, seconds: 0.153, TFLOP/s/device: 88.619, Tokens/s/device: 13357.596, total_weights: 65536, loss: 8.251 I0422 18:06:54.607271 139822767720256 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0422 18:06:54.607867 139822767720256 checkpointing.py:798] Waited 0.0006070137023925781 seconds for step 9 to finish before starting checkpointing. I0422 18:06:54.609821 139822767720256 checkpoint_manager.py:2024] [process=5][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0422 18:06:55.059471 2625 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0422 18:06:57.945590 139699423266560 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260422_154647/nnx_xpk_feat_nnx_set_defaults_true_20260422_154647_11_optimizer_offload_false/checkpoints/0/items/array_metadatas/process_5 I0422 18:07:28.574251 139699414873856 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/gbytes_per_sec: 27.972 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 56.47045922279358 s) (per-host) I0422 18:07:28.574368 139699414873856 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 55.947421s. I0422 18:07:37.432547 139699414873856 async_checkpointer.py:144] [process=5][thread=async_save] Background save thread done. Time taken: 64.805583s. I0422 18:07:37.432786 139694583035648 async_checkpointer.py:273] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0422 18:07:37.432846 139694583035648 async_checkpointer.py:283] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0422 18:07:37.432906 139694583035648 checkpoint_manager.py:2133] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0422 18:07:37.435461 139694583035648 checkpoint_manager.py:2142] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0422 18:07:37.435626 139822767720256 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. W0422 18:07:37.435777 139822767720256 checkpoint_manager.py:1458] Waiting for previous save to complete took 42.825961 seconds. If this number is high, consider checkpointing less frequently. I0422 18:07:37.437731 139822767720256 checkpoint_manager.py:1518] [process=5] Saving checkpoint at step 9 I0422 18:07:37.441160 139822767720256 async_checkpointer.py:452] [process=5] Started async saving checkpoint to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260422_154647/nnx_xpk_feat_nnx_set_defaults_true_20260422_154647_11_optimizer_offload_false/checkpoints/9. I0422 18:07:38.421240 139822767720256 jax_array_handlers.py:358] Scheduling D2H of 69 prioritized jax.Array. I0422 18:07:38.421398 139822767720256 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 I0422 18:07:38.474113 139822767720256 base_pytree_checkpoint_handler.py:153] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.054894s I0422 18:07:38.474291 139822767720256 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/blocking_gbytes_per_sec: 4.752 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.32462453842163086 s) (per-host) I0422 18:07:38.474342 139822767720256 base_pytree_checkpoint_handler.py:737] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.324686s (batch_requests_ready=0.265095s, total_serialization_initiated=0.059522s, others=0.000068s) I0422 18:07:38.474436 139822767720256 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.328758s (all_items=0.000014s, per_item={'items': '0.00001359'}, temp_paths=0.328744) I0422 18:07:38.475339 139695632406272 async_checkpointer.py:79] [process=5][thread=async_save] Background save thread started. I0422 18:07:38.475493 139822767720256 async_checkpointer.py:561] Finished blocking save. Time taken: 1.037691s. Continuing background save to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260422_154647/nnx_xpk_feat_nnx_set_defaults_true_20260422_154647_11_optimizer_offload_false/checkpoints/9. I0422 18:07:38.896719 139822767720256 checkpoint_manager.py:1566] [process=5][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0422 18:07:38.897073 139694583035648 async_checkpointer.py:265] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0422 18:07:38.897244 139822767720256 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260422_154647/nnx_xpk_feat_nnx_set_defaults_true_20260422_154647_11_optimizer_offload_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776881214.6097927, 'wait_for_prev_duration_secs': 42.825961112976074, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776881257.437771, 'checkpointer_blocking_duration_secs': 1.0378296375274658, 'get_old_steps_start_time': 1776881258.4756215, 'get_old_steps_duration_secs': 2.6941299438476562e-05, 'checkpoint_manager_blocking_start_time': 1776881214.608086, 'checkpoint_manager_blocking_duration_secs': 44.28912091255188} I0422 18:07:38.897356 139822767720256 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0422 18:07:38.897401 139822767720256 checkpoint_manager.py:2024] [process=5][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0422 18:07:44.088544 139699423266560 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260422_154647/nnx_xpk_feat_nnx_set_defaults_true_20260422_154647_11_optimizer_offload_false/checkpoints/9/items/array_metadatas/process_5 I0422 18:08:20.783942 139695632406272 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/gbytes_per_sec: 37.050 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.63423490524292 s) (per-host) I0422 18:08:20.784065 139695632406272 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.308618s. I0422 18:08:28.884383 139695632406272 async_checkpointer.py:144] [process=5][thread=async_save] Background save thread done. Time taken: 50.408922s. I0422 18:08:28.884689 139694583035648 async_checkpointer.py:273] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0422 18:08:28.884811 139694583035648 async_checkpointer.py:283] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0422 18:08:28.884860 139694583035648 checkpoint_manager.py:2133] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0422 18:08:28.886244 139694583035648 checkpoint_manager.py:2142] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0422 18:08:28.886425 139822767720256 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. I0422 18:08:28.886598 139822767720256 checkpoint_manager.py:2013] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0422 18:08:28.887258 139822767720256 metric_logger.py:185] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.234, Tokens/s/device: 13902.466, 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: Wed Apr 22 18:08:39 UTC 2026 EXIT_CODE=0