XPK Start: Sat Apr 25 13:40:23 UTC 2026 PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used. `rope_parameters`'s factor field must be a float >= 1, got 40 `rope_parameters`'s beta_fast field must be a float, got 32 `rope_parameters`'s beta_slow field must be a float, got 1 DeepseekV32Config got `key=rope_scaling` in kwargs but hasn't set it as attribute. For RoPE standardization you need to set `self.rope_parameters` in model's config. 2026-04-25 13:40:47.768416: 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) I0425 13:40:48.341067 132186049410880 max_utils.py:273] Attempting to initialize the jax distributed system... I0425 13:40:57.381134 132186049410880 distributed.py:149] Starting JAX distributed service on [::]:8482 I0425 13:40:57.383476 132186049410880 distributed.py:172] Connecting to JAX distributed service on mt-01-base-1wn6k-slice-job-0-0.mt-01-base-1wn6k:8482 I0425 13:40:58.392399 132186049410880 max_utils.py:284] Jax distributed system initialized! I0425 13:41:04.538423 132186049410880 max_utils.py:800] System Information: Jax Version: 0.9.2 I0425 13:41:04.538532 132186049410880 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0425 13:41:04.538573 132186049410880 max_utils.py:802] System Information: Jax Backend: PJRT C API TFRT TPU v6 lite Built on Mar 4 2026 11:32:08 (1772652728) cl/878335365 I0425 13:41:04.538611 132186049410880 train_utils.py:391] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0425 13:41:05.237693 132186049410880 maxtext_utils.py:1771] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0425 13:41:05.351738 132186049410880 checkpointing.py:688] Setting up checkpoint logger... I0425 13:41:05.351856 132186049410880 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0425 13:41:05.351902 132186049410880 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0425 13:41:05.352116 132186049410880 base_pytree_checkpoint_handler.py:441] 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 0x78385f914fb0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0425 13:41:09.073122 132186049410880 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0425 13:41:09.073376 132186049410880 checkpoint_manager.py:708] [process=3][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x783732b26600>}, handler_registry=None I0425 13:41:09.073625 132186049410880 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x783732b26600>` 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`. I0425 13:41:09.073674 132186049410880 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x782348637e30>` 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`. I0425 13:41:09.073711 132186049410880 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 0x783732b26600>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x783732b26600>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x782348637e30>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x782348637e30>}). I0425 13:41:09.074057 132186049410880 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0425 13:41:09.074131 132186049410880 async_checkpointer.py:192] [process=3][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x78234861f1a0> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0425 13:41:09.779137 132186049410880 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260425_121355/nnx_xpk_feat_nnx_post_train_fixes_20260425_121355_01_base/checkpoints I0425 13:41:09.979307 132186049410880 checkpoint_manager.py:929] [process=3][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_post_train_fixes_20260425_121355/nnx_xpk_feat_nnx_post_train_fixes_20260425_121355_01_base/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x782348635af0> I0425 13:41:09.979484 132186049410880 checkpointing.py:302] Checkpoint manager created! I0425 13:41:10.954071 132186049410880 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0425 13:41:10.954192 132186049410880 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0425 13:41:12.349148 132186049410880 maxtext_utils.py:1889] decoder/decoder_norm/scale/value Shape: float32[2048] Physical: (None,) I0425 13:41:12.349269 132186049410880 maxtext_utils.py:1889] decoder/layers/mlp/wi_0/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0425 13:41:12.349321 132186049410880 maxtext_utils.py:1889] decoder/layers/mlp/wi_1/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0425 13:41:12.349362 132186049410880 maxtext_utils.py:1889] decoder/layers/mlp/wo/kernel/value Shape: float32[7168,16,2048] Physical: (None, None, 'fsdp') I0425 13:41:12.349398 132186049410880 maxtext_utils.py:1889] decoder/layers/post_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0425 13:41:12.349431 132186049410880 maxtext_utils.py:1889] decoder/layers/pre_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0425 13:41:12.349467 132186049410880 maxtext_utils.py:1889] decoder/layers/self_attention/key/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0425 13:41:12.349504 132186049410880 maxtext_utils.py:1889] decoder/layers/self_attention/out/kernel/value Shape: float32[16,16,128,2048] Physical: (None, None, None, 'fsdp') I0425 13:41:12.349543 132186049410880 maxtext_utils.py:1889] decoder/layers/self_attention/query/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0425 13:41:12.349576 132186049410880 maxtext_utils.py:1889] decoder/layers/self_attention/value/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0425 13:41:12.349608 132186049410880 maxtext_utils.py:1889] decoder/logits_dense/kernel/value Shape: float32[2048,32000] Physical: ('fsdp', None) I0425 13:41:12.349640 132186049410880 maxtext_utils.py:1889] token_embedder/embedding/value Shape: float32[32000,2048] Physical: (None, 'fsdp') I0425 13:41:12.769126 132186049410880 nnx_decoders.py:465] nnx_decoders/carry Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0425 13:41:12.769221 132186049410880 nnx_decoders.py:465] nnx_decoders/carry Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0425 13:41:12.774595 132186049410880 nnx_decoders.py:465] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0425 13:41:12.774652 132186049410880 nnx_decoders.py:465] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0425 13:41:12.791177 132186049410880 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn'). I0425 13:41:12.791237 132186049410880 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0425 13:41:12.807712 132186049410880 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn'). I0425 13:41:12.807772 132186049410880 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0425 13:41:12.833836 132186049410880 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim'). I0425 13:41:12.833909 132186049410880 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 13:41:12.850467 132186049410880 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim'). I0425 13:41:12.850531 132186049410880 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 13:41:12.866847 132186049410880 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim'). I0425 13:41:12.866909 132186049410880 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 13:41:12.897398 132186049410880 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch_attn', 'activation_length_attn', 'activation_heads', 'activation_kv'). I0425 13:41:12.897477 132186049410880 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 13:41:12.917524 132186049410880 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0425 13:41:12.917594 132186049410880 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0425 13:41:24.215012 132186049410880 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. I0425 13:41:24.217352 132186049410880 metric_logger.py:301] number parameters: 1.104 billion I0425 13:41:35.488895 132186049410880 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0425 13:41:35.642063 132186049410880 checkpointing.py:798] Waited 0.153151273727417 seconds for step 0 to finish before starting checkpointing. I0425 13:41:35.644450 132186049410880 checkpoint_manager.py:2009] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0425 13:41:35.646223 132186049410880 checkpoint_manager.py:1512] [process=3] Saving checkpoint at step 0 I0425 13:41:35.647592 132186049410880 event_tracking.py:70] [process=3] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260425_121355/nnx_xpk_feat_nnx_post_train_fixes_20260425_121355_01_base/checkpoints/0. I0425 13:41:36.294606 132186049410880 signaling_client.py:364] Using JaxDistributedSignalingClient I0425 13:41:36.295622 132186049410880 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array. I0425 13:41:36.295681 132186049410880 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 I0425 13:41:36.572535 132186049410880 base_pytree_checkpoint_handler.py:154] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.278710s I0425 13:41:36.572711 132186049410880 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/blocking_gbytes_per_sec: 5.355 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28806138038635254 s) (per-host) I0425 13:41:36.572768 132186049410880 base_pytree_checkpoint_handler.py:768] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.288127s (batch_requests_ready=0.003229s, total_serialization_initiated=0.284825s, others=0.000073s) I0425 13:41:36.572862 132186049410880 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.292455s (all_items=0.000019s, per_item={'items': '0.00001860'}, temp_paths=0.292437) I0425 13:41:36.573656 132186049410880 event_tracking.py:125] [process=3] [async] Finished blocking save in 0.93 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260425_121355/nnx_xpk_feat_nnx_post_train_fixes_20260425_121355_01_base/checkpoints/0. I0425 13:41:36.573988 132058643609344 async_checkpointer.py:76] [process=3][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-25 14:01:36.573951 I0425 13:41:36.581818 132186049410880 checkpoint_manager.py:1560] [process=3][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0425 13:41:36.582143 132057048766208 async_checkpointer.py:280] [process=3][thread=save_finalize] Waiting for background save thread=async_save. I0425 13:41:36.582304 132186049410880 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260425_121355/nnx_xpk_feat_nnx_post_train_fixes_20260425_121355_01_base/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777124495.6444316, 'wait_for_prev_duration_secs': 6.67572021484375e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777124495.6462631, 'checkpointer_blocking_duration_secs': 0.9278788566589355, 'get_old_steps_start_time': 1777124496.574166, 'get_old_steps_duration_secs': 3.0994415283203125e-05, 'checkpoint_manager_blocking_start_time': 1777124495.6424766, 'checkpoint_manager_blocking_duration_secs': 0.9397885799407959} I0425 13:41:36.582416 132186049410880 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0425 13:41:36.582483 132186049410880 max_utils.py:750] Memstats: After params initialized: I0425 13:41:36.582538 132186049410880 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_10(process=3,(2,2,0,0)) I0425 13:41:36.582581 132186049410880 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_11(process=3,(3,2,0,0)) I0425 13:41:36.582608 132186049410880 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_14(process=3,(2,3,0,0)) I0425 13:41:36.582633 132186049410880 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_15(process=3,(3,3,0,0)) I0425 13:41:36.901674 132186049410880 metric_logger.py:196] completed step: 0, seconds: 11.270, TFLOP/s/device: 1.206, Tokens/s/device: 181.715, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52786.469 I0425 13:41:37.076825 132186049410880 metric_logger.py:196] completed step: 1, seconds: 1.411, TFLOP/s/device: 9.629, Tokens/s/device: 1451.453, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52786.469 I0425 13:41:37.506804 132186049410880 metric_logger.py:196] completed step: 2, seconds: 0.029, TFLOP/s/device: 468.683, Tokens/s/device: 70645.050, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28632.133 I0425 13:41:37.654258 132186049410880 metric_logger.py:196] completed step: 3, seconds: 0.420, TFLOP/s/device: 32.382, Tokens/s/device: 4880.990, total_weights: 65536, loss: 9.732, lm_loss: 9.732, perplexity: 16855.789 I0425 13:41:37.950011 132186049410880 metric_logger.py:196] completed step: 4, seconds: 0.165, TFLOP/s/device: 82.584, Tokens/s/device: 12447.956, total_weights: 65536, loss: 9.274, lm_loss: 9.274, perplexity: 10661.594 I0425 13:41:37.957863 132186049410880 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.385, Tokens/s/device: 13925.342, total_weights: 65536, loss: 8.888, lm_loss: 8.888, perplexity: 7245.978 I0425 13:41:39.591568 2822 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0425 13:41:42.227773 132057057158912 array_metadata_store.py:203] [process=3][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260425_121355/nnx_xpk_feat_nnx_post_train_fixes_20260425_121355_01_base/checkpoints/0/items/array_metadatas/process_3 I0425 13:41:59.991598 132186049410880 metric_logger.py:196] completed step: 6, seconds: 0.297, TFLOP/s/device: 45.807, Tokens/s/device: 6904.457, total_weights: 65536, loss: 8.589, lm_loss: 8.589, perplexity: 5371.156 I0425 13:42:00.139272 132186049410880 metric_logger.py:196] completed step: 7, seconds: 21.888, TFLOP/s/device: 0.621, Tokens/s/device: 93.568, total_weights: 65536, loss: 8.380, lm_loss: 8.380, perplexity: 4360.465 I0425 13:42:00.286879 132186049410880 metric_logger.py:196] completed step: 8, seconds: 0.153, TFLOP/s/device: 88.704, Tokens/s/device: 13370.503, total_weights: 65536, loss: 8.251, lm_loss: 8.251, perplexity: 3831.256 I0425 13:42:00.435158 132186049410880 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0425 13:42:00.435792 132186049410880 checkpointing.py:798] Waited 0.0006470680236816406 seconds for step 9 to finish before starting checkpointing. I0425 13:42:00.437795 132186049410880 checkpoint_manager.py:2020] [process=3][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0425 13:42:13.039223 132058643609344 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/gbytes_per_sec: 42.977 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 36.754533529281616 s) (per-host) I0425 13:42:13.039342 132058643609344 async_checkpointer.py:90] [process=3][thread=async_save] 3 Handler Commit operations completed. Time taken: 36.465245s. I0425 13:42:21.599023 132058643609344 async_checkpointer.py:160] [process=3][thread=async_save] Background save thread done. Time taken: 45.024908s. I0425 13:42:21.599293 132057048766208 async_checkpointer.py:288] [process=3][thread=save_finalize] Done with waiting for background save thread=async_save. I0425 13:42:21.599435 132057048766208 async_checkpointer.py:298] [process=3][thread=save_finalize] No errors found in background save thread=async_save. I0425 13:42:21.599488 132057048766208 checkpoint_manager.py:2137] [process=3][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0425 13:42:21.601155 132057048766208 checkpoint_manager.py:2146] [process=3][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0425 13:42:21.601345 132186049410880 checkpoint_manager.py:2032] [process=3][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0. W0425 13:42:21.601495 132186049410880 checkpoint_manager.py:1452] Waiting for previous save to complete took 21.163685 seconds. If this number is high, consider checkpointing less frequently. I0425 13:42:21.603239 132186049410880 checkpoint_manager.py:1512] [process=3] Saving checkpoint at step 9 I0425 13:42:21.605316 132186049410880 event_tracking.py:70] [process=3] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260425_121355/nnx_xpk_feat_nnx_post_train_fixes_20260425_121355_01_base/checkpoints/9. I0425 13:42:21.894834 132186049410880 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array. I0425 13:42:21.894935 132186049410880 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 I0425 13:42:21.929369 132186049410880 base_pytree_checkpoint_handler.py:154] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.036257s I0425 13:42:21.929509 132186049410880 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/blocking_gbytes_per_sec: 35.449 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.043515682220458984 s) (per-host) I0425 13:42:21.929557 132186049410880 base_pytree_checkpoint_handler.py:768] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.043571s (batch_requests_ready=0.002911s, total_serialization_initiated=0.040598s, others=0.000062s) I0425 13:42:21.929642 132186049410880 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.047621s (all_items=0.000017s, per_item={'items': '0.00001669'}, temp_paths=0.047604) I0425 13:42:21.930275 132186049410880 event_tracking.py:125] [process=3] [async] Finished blocking save in 0.33 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260425_121355/nnx_xpk_feat_nnx_post_train_fixes_20260425_121355_01_base/checkpoints/9. I0425 13:42:21.930629 132057048766208 async_checkpointer.py:76] [process=3][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-25 14:02:21.930592 I0425 13:42:21.932496 132186049410880 checkpoint_manager.py:1560] [process=3][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0425 13:42:21.932765 132057057158912 async_checkpointer.py:280] [process=3][thread=save_finalize] Waiting for background save thread=async_save. I0425 13:42:21.932933 132186049410880 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260425_121355/nnx_xpk_feat_nnx_post_train_fixes_20260425_121355_01_base/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777124520.437767, 'wait_for_prev_duration_secs': 21.163684844970703, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777124541.6032777, 'checkpointer_blocking_duration_secs': 0.32749438285827637, 'get_old_steps_start_time': 1777124541.9307933, 'get_old_steps_duration_secs': 2.8848648071289062e-05, 'checkpoint_manager_blocking_start_time': 1777124520.4360397, 'checkpoint_manager_blocking_duration_secs': 21.49685025215149} I0425 13:42:21.933048 132186049410880 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0425 13:42:21.933096 132186049410880 checkpoint_manager.py:2020] [process=3][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0425 13:42:27.084821 132035339314944 array_metadata_store.py:203] [process=3][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260425_121355/nnx_xpk_feat_nnx_post_train_fixes_20260425_121355_01_base/checkpoints/9/items/array_metadatas/process_3 I0425 13:43:03.581287 132057048766208 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/gbytes_per_sec: 37.884 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.69526672363281 s) (per-host) I0425 13:43:03.581391 132057048766208 async_checkpointer.py:90] [process=3][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.650652s. I0425 13:43:11.480920 132057048766208 async_checkpointer.py:160] [process=3][thread=async_save] Background save thread done. Time taken: 49.550165s. I0425 13:43:11.481224 132057057158912 async_checkpointer.py:288] [process=3][thread=save_finalize] Done with waiting for background save thread=async_save. I0425 13:43:11.481348 132057057158912 async_checkpointer.py:298] [process=3][thread=save_finalize] No errors found in background save thread=async_save. I0425 13:43:11.481400 132057057158912 checkpoint_manager.py:2137] [process=3][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0425 13:43:11.484842 132057057158912 checkpoint_manager.py:2146] [process=3][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0425 13:43:11.485037 132186049410880 checkpoint_manager.py:2032] [process=3][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9. I0425 13:43:11.485206 132186049410880 checkpoint_manager.py:2009] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0425 13:43:11.486160 132186049410880 metric_logger.py:196] completed step: 9, seconds: 0.148, TFLOP/s/device: 91.775, Tokens/s/device: 13833.351, total_weights: 65536, loss: 8.175, lm_loss: 8.175, perplexity: 3551.438 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Sat Apr 25 13:43:23 UTC 2026 EXIT_CODE=0