XPK Start: Wed Apr 22 18:04:05 UTC 2026 2026-04-22 18:04:09.413691: 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 00:00:1776881049.426492 10 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered E0000 00:00:1776881049.430223 10 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered W0000 00:00:1776881049.441736 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776881049.441753 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776881049.441756 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776881049.441758 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. 2026-04-22 18:04:28.665590: 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 18:04:29.198515 137460067555136 max_utils.py:273] Attempting to initialize the jax distributed system... INFO:2026-04-22 18:04:38,240:jax._src.distributed:140: Starting JAX distributed service on [::]:8482 I0422 18:04:38.240710 137460067555136 distributed.py:140] Starting JAX distributed service on [::]:8482 INFO:2026-04-22 18:04:38,243:jax._src.distributed:157: Connecting to JAX distributed service on mt-10-shardy-false-4vm1u-slice-job-0-0.mt-10-shardy-false-4vm1u:8482 I0422 18:04:38.243032 137460067555136 distributed.py:157] Connecting to JAX distributed service on mt-10-shardy-false-4vm1u-slice-job-0-0.mt-10-shardy-false-4vm1u:8482 I0422 18:04:39.174724 137460067555136 max_utils.py:284] Jax distributed system initialized! I0422 18:04:46.194042 137460067555136 max_utils.py:800] System Information: Jax Version: 0.8.1 I0422 18:04:46.194168 137460067555136 max_utils.py:801] System Information: Jaxlib Version: 0.8.1 I0422 18:04:46.194211 137460067555136 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 18:04:46.194246 137460067555136 train_utils.py:377] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0422 18:04:46.820435 137460067555136 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0422 18:04:46.937961 137460067555136 checkpointing.py:688] Setting up checkpoint logger... I0422 18:04:46.938078 137460067555136 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0422 18:04:46.938136 137460067555136 pytree_checkpoint_handler.py:589] save_device_host_concurrent_bytes=None I0422 18:04:46.938355 137460067555136 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 0x7d046e178170>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0422 18:04:49.972575 137460067555136 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0422 18:04:49.972812 137460067555136 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 0x7cefec3a4350>}, handler_registry=None I0422 18:04:49.973045 137460067555136 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7cefec3a4350>` 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 18:04:49.973119 137460067555136 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7cefc457dbb0>` 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 18:04:49.973158 137460067555136 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 0x7cefec3a4350>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7cefec3a4350>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7cefc457dbb0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7cefc457dbb0>}). I0422 18:04:49.973466 137460067555136 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.33 I0422 18:04:49.973549 137460067555136 async_checkpointer.py:177] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7cefc44fcf40> timeout: 600 secs and primary_host=0 for async checkpoint writes I0422 18:04:51.110426 137460067555136 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_10_shardy_false/checkpoints I0422 18:04:51.553947 137460067555136 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_20260422_154647/nnx_xpk_feat_nnx_set_defaults_true_20260422_154647_10_shardy_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7cefec3ee210> I0422 18:04:51.554144 137460067555136 checkpointing.py:302] Checkpoint manager created! I0422 18:04:52.502566 137460067555136 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0422 18:04:52.502680 137460067555136 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0422 18:04:53.884403 137460067555136 maxtext_utils.py:1749] decoder/decoder_norm/scale/value Shape: float32[2048] Physical: (None,) I0422 18:04:53.884521 137460067555136 maxtext_utils.py:1749] decoder/layers/mlp/wi_0/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0422 18:04:53.884576 137460067555136 maxtext_utils.py:1749] decoder/layers/mlp/wi_1/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0422 18:04:53.884623 137460067555136 maxtext_utils.py:1749] decoder/layers/mlp/wo/kernel/value Shape: float32[7168,16,2048] Physical: (None, None, 'fsdp') I0422 18:04:53.884662 137460067555136 maxtext_utils.py:1749] decoder/layers/post_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0422 18:04:53.884699 137460067555136 maxtext_utils.py:1749] decoder/layers/pre_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0422 18:04:53.884737 137460067555136 maxtext_utils.py:1749] decoder/layers/self_attention/key/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0422 18:04:53.884775 137460067555136 maxtext_utils.py:1749] decoder/layers/self_attention/out/kernel/value Shape: float32[16,16,128,2048] Physical: (None, None, None, 'fsdp') I0422 18:04:53.884810 137460067555136 maxtext_utils.py:1749] decoder/layers/self_attention/query/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0422 18:04:53.884845 137460067555136 maxtext_utils.py:1749] decoder/layers/self_attention/value/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0422 18:04:53.884878 137460067555136 maxtext_utils.py:1749] decoder/logits_dense/kernel/value Shape: float32[2048,32000] Physical: ('fsdp', None) I0422 18:04:53.884911 137460067555136 maxtext_utils.py:1749] token_embedder/embedding/value Shape: float32[32000,2048] Physical: (None, 'fsdp') I0422 18:04:54.281016 137460067555136 nnx_decoders.py:616] nnx_decoders/carry Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0422 18:04:54.281188 137460067555136 nnx_decoders.py:616] nnx_decoders/carry Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0422 18:04:54.286686 137460067555136 nnx_decoders.py:616] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0422 18:04:54.286783 137460067555136 nnx_decoders.py:616] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0422 18:04:54.446623 137460067555136 attentions.py:1084] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0422 18:04:54.446760 137460067555136 attentions.py:1084] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0422 18:04:54.608082 137460067555136 attentions.py:1085] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0422 18:04:54.608240 137460067555136 attentions.py:1085] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0422 18:04:54.779300 137460067555136 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 18:04:54.779442 137460067555136 attentions.py:1150] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0422 18:04:54.929375 137460067555136 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 18:04:54.929513 137460067555136 attentions.py:1151] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0422 18:04:55.075795 137460067555136 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 18:04:55.075932 137460067555136 attentions.py:1152] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0422 18:04:55.236580 137460067555136 attentions.py:1193] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0422 18:04:55.236720 137460067555136 attentions.py:1193] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0422 18:04:55.259672 137460067555136 linears.py:541] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0422 18:04:55.259769 137460067555136 linears.py:541] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0422 18:05:06.371985 137460067555136 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 18:05:06.374427 137460067555136 metric_logger.py:289] number parameters: 1.104 billion I0422 18:05:17.184775 137460067555136 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0422 18:05:17.338980 137460067555136 checkpointing.py:798] Waited 0.1541900634765625 seconds for step 0 to finish before starting checkpointing. I0422 18:05:17.341678 137460067555136 checkpoint_manager.py:2013] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0422 18:05:17.343359 137460067555136 checkpoint_manager.py:1518] [process=6] Saving checkpoint at step 0 I0422 18:05:17.346184 137460067555136 async_checkpointer.py:452] [process=6] 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_10_shardy_false/checkpoints/0. I0422 18:05:18.329746 137460067555136 signaling_client.py:364] Using JaxDistributedSignalingClient I0422 18:05:18.330849 137460067555136 jax_array_handlers.py:358] Scheduling D2H of 69 prioritized jax.Array. I0422 18:05:18.330911 137460067555136 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 18:05:18.573704 137460067555136 base_pytree_checkpoint_handler.py:153] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.245146s I0422 18:05:18.573873 137460067555136 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.950 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.5229945182800293 s) (per-host) I0422 18:05:18.573930 137460067555136 base_pytree_checkpoint_handler.py:737] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.523062s (batch_requests_ready=0.270392s, total_serialization_initiated=0.252594s, others=0.000075s) I0422 18:05:18.574028 137460067555136 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.527231s (all_items=0.000019s, per_item={'items': '0.00001931'}, temp_paths=0.527211) I0422 18:05:18.574985 137337325471488 async_checkpointer.py:79] [process=6][thread=async_save] Background save thread started. I0422 18:05:18.575187 137460067555136 async_checkpointer.py:561] Finished blocking save. Time taken: 1.231758s. 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_10_shardy_false/checkpoints/0. I0422 18:05:19.043124 137460067555136 checkpoint_manager.py:1566] [process=6][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0422 18:05:19.043504 137333005326080 async_checkpointer.py:265] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0422 18:05:19.043685 137460067555136 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_10_shardy_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776881117.3416617, 'wait_for_prev_duration_secs': 6.29425048828125e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776881117.3433967, 'checkpointer_blocking_duration_secs': 1.2318956851959229, 'get_old_steps_start_time': 1776881118.575315, 'get_old_steps_duration_secs': 2.4318695068359375e-05, 'checkpoint_manager_blocking_start_time': 1776881117.3394773, 'checkpoint_manager_blocking_duration_secs': 1.7041640281677246} I0422 18:05:19.043798 137460067555136 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0422 18:05:19.043874 137460067555136 max_utils.py:750] Memstats: After params initialized: I0422 18:05:19.043930 137460067555136 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0)) I0422 18:05:19.043965 137460067555136 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0)) I0422 18:05:19.043993 137460067555136 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0)) I0422 18:05:19.044018 137460067555136 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0)) I0422 18:05:19.311650 137460067555136 metric_logger.py:185] completed step: 0, seconds: 10.809, TFLOP/s/device: 1.257, Tokens/s/device: 189.467, total_weights: 65536, loss: 10.874 I0422 18:05:19.476243 137460067555136 metric_logger.py:185] completed step: 1, seconds: 2.125, TFLOP/s/device: 6.394, Tokens/s/device: 963.731, total_weights: 65536, loss: 10.874 I0422 18:05:19.920889 137460067555136 metric_logger.py:185] completed step: 2, seconds: 0.019, TFLOP/s/device: 719.657, Tokens/s/device: 108474.576, total_weights: 65536, loss: 10.262 I0422 18:05:20.068348 137460067555136 metric_logger.py:185] completed step: 3, seconds: 0.436, TFLOP/s/device: 31.185, Tokens/s/device: 4700.579, total_weights: 65536, loss: 9.732 I0422 18:05:20.363834 137460067555136 metric_logger.py:185] completed step: 4, seconds: 0.163, TFLOP/s/device: 83.608, Tokens/s/device: 12602.379, total_weights: 65536, loss: 9.274 I0422 18:05:20.371090 137460067555136 metric_logger.py:185] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.241, Tokens/s/device: 13903.504, total_weights: 65536, loss: 8.888 I0422 18:05:40.711605 137460067555136 metric_logger.py:185] completed step: 6, seconds: 0.296, TFLOP/s/device: 45.920, Tokens/s/device: 6921.608, total_weights: 65536, loss: 8.589 I0422 18:05:40.859116 137460067555136 metric_logger.py:185] completed step: 7, seconds: 20.194, TFLOP/s/device: 0.673, Tokens/s/device: 101.415, total_weights: 65536, loss: 8.380 I0422 18:05:41.006559 137460067555136 metric_logger.py:185] completed step: 8, seconds: 0.154, TFLOP/s/device: 88.231, Tokens/s/device: 13299.133, total_weights: 65536, loss: 8.251 I0422 18:05:41.154882 137460067555136 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0422 18:05:41.155475 137460067555136 checkpointing.py:798] Waited 0.0006034374237060547 seconds for step 9 to finish before starting checkpointing. I0422 18:05:41.158241 137460067555136 checkpoint_manager.py:2024] [process=6][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0422 18:05:41.575673 2600 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0422 18:05:43.971422 137337333864192 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_20260422_154647/nnx_xpk_feat_nnx_set_defaults_true_20260422_154647_10_shardy_false/checkpoints/0/items/array_metadatas/process_6 I0422 18:06:15.803615 137337325471488 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/gbytes_per_sec: 27.351 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 57.75269627571106 s) (per-host) I0422 18:06:15.803731 137337325471488 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 57.228606s. I0422 18:06:23.112175 137337325471488 async_checkpointer.py:144] [process=6][thread=async_save] Background save thread done. Time taken: 64.537036s. I0422 18:06:23.112465 137333005326080 async_checkpointer.py:273] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0422 18:06:23.112605 137333005326080 async_checkpointer.py:283] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0422 18:06:23.112664 137333005326080 checkpoint_manager.py:2133] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0422 18:06:23.113955 137333005326080 checkpoint_manager.py:2142] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0422 18:06:23.114182 137460067555136 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. W0422 18:06:23.114316 137460067555136 checkpoint_manager.py:1458] Waiting for previous save to complete took 41.956079 seconds. If this number is high, consider checkpointing less frequently. I0422 18:06:23.117702 137460067555136 checkpoint_manager.py:1518] [process=6] Saving checkpoint at step 9 I0422 18:06:23.121089 137460067555136 async_checkpointer.py:452] [process=6] 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_10_shardy_false/checkpoints/9. I0422 18:06:23.675139 137460067555136 jax_array_handlers.py:358] Scheduling D2H of 69 prioritized jax.Array. I0422 18:06:23.675294 137460067555136 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 18:06:23.723170 137460067555136 base_pytree_checkpoint_handler.py:153] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.050021s I0422 18:06:23.723340 137460067555136 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/blocking_gbytes_per_sec: 4.822 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.31987667083740234 s) (per-host) I0422 18:06:23.723392 137460067555136 base_pytree_checkpoint_handler.py:737] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.319937s (batch_requests_ready=0.265152s, total_serialization_initiated=0.054717s, others=0.000068s) I0422 18:06:23.723489 137460067555136 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.323864s (all_items=0.000016s, per_item={'items': '0.00001597'}, temp_paths=0.323848) I0422 18:06:23.724419 137334087460608 async_checkpointer.py:79] [process=6][thread=async_save] Background save thread started. I0422 18:06:23.724599 137460067555136 async_checkpointer.py:561] Finished blocking save. Time taken: 0.606823s. 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_10_shardy_false/checkpoints/9. I0422 18:06:23.726446 137460067555136 checkpoint_manager.py:1566] [process=6][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0422 18:06:23.726706 137333005326080 async_checkpointer.py:265] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0422 18:06:23.726846 137460067555136 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_10_shardy_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776881141.1582124, 'wait_for_prev_duration_secs': 41.95607948303223, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776881183.1177425, 'checkpointer_blocking_duration_secs': 0.6069681644439697, 'get_old_steps_start_time': 1776881183.7247312, 'get_old_steps_duration_secs': 2.384185791015625e-05, 'checkpoint_manager_blocking_start_time': 1776881141.1557002, 'checkpoint_manager_blocking_duration_secs': 42.57111072540283} I0422 18:06:23.727014 137460067555136 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0422 18:06:23.727060 137460067555136 checkpoint_manager.py:2024] [process=6][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0422 18:06:28.493867 137337333864192 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_20260422_154647/nnx_xpk_feat_nnx_set_defaults_true_20260422_154647_10_shardy_false/checkpoints/9/items/array_metadatas/process_6 I0422 18:07:04.990595 137334087460608 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/gbytes_per_sec: 37.983 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.58709120750427 s) (per-host) I0422 18:07:04.990712 137334087460608 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.266175s. I0422 18:07:13.627832 137334087460608 async_checkpointer.py:144] [process=6][thread=async_save] Background save thread done. Time taken: 49.903278s. I0422 18:07:13.628131 137333005326080 async_checkpointer.py:273] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0422 18:07:13.628249 137333005326080 async_checkpointer.py:283] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0422 18:07:13.628294 137333005326080 checkpoint_manager.py:2133] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0422 18:07:13.629625 137333005326080 checkpoint_manager.py:2142] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0422 18:07:13.629801 137460067555136 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. I0422 18:07:13.629971 137460067555136 checkpoint_manager.py:2013] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0422 18:07:13.630600 137460067555136 metric_logger.py:185] completed step: 9, seconds: 0.146, TFLOP/s/device: 92.830, Tokens/s/device: 13992.321, 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 18:07:25 UTC 2026 EXIT_CODE=0