XPK Start: Sat Apr 25 14:06:36 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 14:07:01.142426: 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 14:07:01.351794 134706853001024 max_utils.py:273] Attempting to initialize the jax distributed system... I0425 14:07:10.392218 134706853001024 distributed.py:149] Starting JAX distributed service on [::]:8482 I0425 14:07:10.394509 134706853001024 distributed.py:172] Connecting to JAX distributed service on mt-10-shardy-false-3jtyv-slice-job-0-0.mt-10-shardy-false-3jtyv:8482 I0425 14:07:11.189137 134706853001024 max_utils.py:284] Jax distributed system initialized! I0425 14:07:17.361312 134706853001024 max_utils.py:800] System Information: Jax Version: 0.9.2 I0425 14:07:17.361416 134706853001024 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0425 14:07:17.361457 134706853001024 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 14:07:17.361493 134706853001024 train_utils.py:391] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0425 14:07:18.068414 134706853001024 maxtext_utils.py:1771] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0425 14:07:18.184846 134706853001024 checkpointing.py:688] Setting up checkpoint logger... I0425 14:07:18.184970 134706853001024 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0425 14:07:18.185021 134706853001024 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0425 14:07:18.185224 134706853001024 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 0x7a832a650b90>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0425 14:07:21.184447 134706853001024 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0425 14:07:21.184690 134706853001024 checkpoint_manager.py:708] [process=5][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7a6dd4439400>}, handler_registry=None I0425 14:07:21.184929 134706853001024 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7a6dd4439400>` 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 14:07:21.184977 134706853001024 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a6dd44a5b50>` 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 14:07:21.185017 134706853001024 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 0x7a6dd4439400>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7a6dd4439400>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a6dd44a5b50>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a6dd44a5b50>}). I0425 14:07:21.185353 134706853001024 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0425 14:07:21.185420 134706853001024 async_checkpointer.py:192] [process=5][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7a6dd444f6a0> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0425 14:07:22.240322 134706853001024 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_10_shardy_false/checkpoints I0425 14:07:22.267335 134706853001024 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_post_train_fixes_20260425_121355/nnx_xpk_feat_nnx_post_train_fixes_20260425_121355_10_shardy_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7a821e381910> I0425 14:07:22.267468 134706853001024 checkpointing.py:302] Checkpoint manager created! I0425 14:07:23.236734 134706853001024 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0425 14:07:23.236853 134706853001024 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0425 14:07:24.566312 134706853001024 maxtext_utils.py:1889] decoder/decoder_norm/scale/value Shape: float32[2048] Physical: (None,) I0425 14:07:24.566432 134706853001024 maxtext_utils.py:1889] decoder/layers/mlp/wi_0/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0425 14:07:24.566486 134706853001024 maxtext_utils.py:1889] decoder/layers/mlp/wi_1/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0425 14:07:24.566531 134706853001024 maxtext_utils.py:1889] decoder/layers/mlp/wo/kernel/value Shape: float32[7168,16,2048] Physical: (None, None, 'fsdp') I0425 14:07:24.566568 134706853001024 maxtext_utils.py:1889] decoder/layers/post_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0425 14:07:24.566603 134706853001024 maxtext_utils.py:1889] decoder/layers/pre_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0425 14:07:24.566639 134706853001024 maxtext_utils.py:1889] decoder/layers/self_attention/key/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0425 14:07:24.566689 134706853001024 maxtext_utils.py:1889] decoder/layers/self_attention/out/kernel/value Shape: float32[16,16,128,2048] Physical: (None, None, None, 'fsdp') I0425 14:07:24.566725 134706853001024 maxtext_utils.py:1889] decoder/layers/self_attention/query/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0425 14:07:24.566758 134706853001024 maxtext_utils.py:1889] decoder/layers/self_attention/value/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0425 14:07:24.566791 134706853001024 maxtext_utils.py:1889] decoder/logits_dense/kernel/value Shape: float32[2048,32000] Physical: ('fsdp', None) I0425 14:07:24.566823 134706853001024 maxtext_utils.py:1889] token_embedder/embedding/value Shape: float32[32000,2048] Physical: (None, 'fsdp') I0425 14:07:24.967554 134706853001024 nnx_decoders.py:465] nnx_decoders/carry Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0425 14:07:24.967659 134706853001024 nnx_decoders.py:465] nnx_decoders/carry Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0425 14:07:24.973015 134706853001024 nnx_decoders.py:465] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0425 14:07:24.973072 134706853001024 nnx_decoders.py:465] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0425 14:07:24.989598 134706853001024 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0425 14:07:24.989670 134706853001024 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0425 14:07:25.005668 134706853001024 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0425 14:07:25.005726 134706853001024 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0425 14:07:25.029983 134706853001024 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0425 14:07:25.030049 134706853001024 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 14:07:25.046103 134706853001024 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0425 14:07:25.046164 134706853001024 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 14:07:25.062080 134706853001024 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0425 14:07:25.062143 134706853001024 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 14:07:25.097988 134706853001024 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0425 14:07:25.098086 134706853001024 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 14:07:25.118475 134706853001024 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0425 14:07:25.118542 134706853001024 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0425 14:07:36.161574 134706853001024 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 14:07:36.163970 134706853001024 metric_logger.py:301] number parameters: 1.104 billion I0425 14:07:47.299926 134706853001024 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0425 14:07:47.596431 134706853001024 checkpointing.py:798] Waited 0.29648876190185547 seconds for step 0 to finish before starting checkpointing. I0425 14:07:47.598754 134706853001024 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0425 14:07:47.600371 134706853001024 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 0 I0425 14:07:47.601810 134706853001024 event_tracking.py:70] [process=5] [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_10_shardy_false/checkpoints/0. I0425 14:07:47.889214 134706853001024 signaling_client.py:364] Using JaxDistributedSignalingClient I0425 14:07:47.890204 134706853001024 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array. I0425 14:07:47.890261 134706853001024 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 14:07:48.159770 134706853001024 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.271330s I0425 14:07:48.159944 134706853001024 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 5.498 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28057336807250977 s) (per-host) I0425 14:07:48.159998 134706853001024 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.280638s (batch_requests_ready=0.002948s, total_serialization_initiated=0.277618s, others=0.000073s) I0425 14:07:48.160106 134706853001024 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.284763s (all_items=0.000018s, per_item={'items': '0.00001764'}, temp_paths=0.284745) I0425 14:07:48.160875 134706853001024 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.56 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_10_shardy_false/checkpoints/0. I0425 14:07:48.161163 134577920792320 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-25 14:27:48.161137 I0425 14:07:48.177394 134706853001024 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0425 14:07:48.177668 134575774746368 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0425 14:07:48.177792 134706853001024 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_10_shardy_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777126067.5987349, 'wait_for_prev_duration_secs': 6.0558319091796875e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777126067.6004083, 'checkpointer_blocking_duration_secs': 0.5608720779418945, 'get_old_steps_start_time': 1777126068.1613042, 'get_old_steps_duration_secs': 2.9325485229492188e-05, 'checkpoint_manager_blocking_start_time': 1777126067.5968292, 'checkpoint_manager_blocking_duration_secs': 0.5809237957000732} I0425 14:07:48.177901 134706853001024 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0425 14:07:48.177973 134706853001024 max_utils.py:750] Memstats: After params initialized: I0425 14:07:48.178022 134706853001024 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_18(process=5,(2,4,0,0)) I0425 14:07:48.178053 134706853001024 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_19(process=5,(3,4,0,0)) I0425 14:07:48.178090 134706853001024 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_22(process=5,(2,5,0,0)) I0425 14:07:48.178112 134706853001024 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_23(process=5,(3,5,0,0)) I0425 14:07:48.486235 134706853001024 metric_logger.py:196] completed step: 0, seconds: 11.135, TFLOP/s/device: 1.220, Tokens/s/device: 183.926, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52786.469 I0425 14:07:48.672308 134706853001024 metric_logger.py:196] completed step: 1, seconds: 1.184, TFLOP/s/device: 11.472, Tokens/s/device: 1729.121, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52786.469 I0425 14:07:49.074005 134706853001024 metric_logger.py:196] completed step: 2, seconds: 0.040, TFLOP/s/device: 340.436, Tokens/s/device: 51314.174, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28632.133 I0425 14:07:49.221447 134706853001024 metric_logger.py:196] completed step: 3, seconds: 0.392, TFLOP/s/device: 34.702, Tokens/s/device: 5230.695, total_weights: 65536, loss: 9.732, lm_loss: 9.732, perplexity: 16855.789 I0425 14:07:49.517164 134706853001024 metric_logger.py:196] completed step: 4, seconds: 0.164, TFLOP/s/device: 82.614, Tokens/s/device: 12452.422, total_weights: 65536, loss: 9.274, lm_loss: 9.274, perplexity: 10661.594 I0425 14:07:49.525398 134706853001024 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.467, Tokens/s/device: 13937.662, total_weights: 65536, loss: 8.888, lm_loss: 8.888, perplexity: 7245.978 I0425 14:07:51.768247 2837 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0425 14:07:53.778197 134575783139072 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_post_train_fixes_20260425_121355/nnx_xpk_feat_nnx_post_train_fixes_20260425_121355_10_shardy_false/checkpoints/0/items/array_metadatas/process_5 I0425 14:08:12.459066 134706853001024 metric_logger.py:196] completed step: 6, seconds: 0.297, TFLOP/s/device: 45.739, Tokens/s/device: 6894.300, total_weights: 65536, loss: 8.589, lm_loss: 8.589, perplexity: 5371.156 I0425 14:08:12.606434 134706853001024 metric_logger.py:196] completed step: 7, seconds: 22.787, TFLOP/s/device: 0.596, Tokens/s/device: 89.875, total_weights: 65536, loss: 8.380, lm_loss: 8.380, perplexity: 4360.465 I0425 14:08:12.754069 134706853001024 metric_logger.py:196] completed step: 8, seconds: 0.153, TFLOP/s/device: 88.546, Tokens/s/device: 13346.628, total_weights: 65536, loss: 8.251, lm_loss: 8.251, perplexity: 3831.256 I0425 14:08:12.902351 134706853001024 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0425 14:08:12.903063 134706853001024 checkpointing.py:798] Waited 0.0007195472717285156 seconds for step 9 to finish before starting checkpointing. I0425 14:08:12.905272 134706853001024 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0425 14:08:24.990433 134577920792320 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 42.564 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 37.111037254333496 s) (per-host) I0425 14:08:24.990535 134577920792320 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 36.829293s. I0425 14:08:35.376318 134577920792320 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 47.215059s. I0425 14:08:35.376537 134575774746368 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0425 14:08:35.376602 134575774746368 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0425 14:08:35.376673 134575774746368 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0425 14:08:35.378364 134575774746368 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0425 14:08:35.378524 134706853001024 checkpoint_manager.py:2032] [process=5][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0. W0425 14:08:35.378671 134706853001024 checkpoint_manager.py:1452] Waiting for previous save to complete took 22.473386 seconds. If this number is high, consider checkpointing less frequently. I0425 14:08:35.380439 134706853001024 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 9 I0425 14:08:35.382677 134706853001024 event_tracking.py:70] [process=5] [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_10_shardy_false/checkpoints/9. I0425 14:08:35.669345 134706853001024 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array. I0425 14:08:35.669437 134706853001024 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 14:08:35.709867 134706853001024 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.042131s I0425 14:08:35.710028 134706853001024 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 31.369 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04917573928833008 s) (per-host) I0425 14:08:35.710078 134706853001024 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.049236s (batch_requests_ready=0.002647s, total_serialization_initiated=0.046523s, others=0.000065s) I0425 14:08:35.710171 134706853001024 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.053264s (all_items=0.000015s, per_item={'items': '0.00001454'}, temp_paths=0.053249) I0425 14:08:35.710900 134706853001024 event_tracking.py:125] [process=5] [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_10_shardy_false/checkpoints/9. I0425 14:08:35.711212 134575774746368 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-25 14:28:35.711176 I0425 14:08:35.713190 134706853001024 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0425 14:08:35.713421 134575783139072 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0425 14:08:35.713521 134706853001024 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_10_shardy_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777126092.905243, 'wait_for_prev_duration_secs': 22.47338628768921, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777126115.3804772, 'checkpointer_blocking_duration_secs': 0.33087658882141113, 'get_old_steps_start_time': 1777126115.7113774, 'get_old_steps_duration_secs': 3.0517578125e-05, 'checkpoint_manager_blocking_start_time': 1777126092.903323, 'checkpoint_manager_blocking_duration_secs': 22.810166358947754} I0425 14:08:35.713691 134706853001024 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0425 14:08:35.713739 134706853001024 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0425 14:08:41.413386 134555298150144 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_post_train_fixes_20260425_121355/nnx_xpk_feat_nnx_post_train_fixes_20260425_121355_10_shardy_false/checkpoints/9/items/array_metadatas/process_5 I0425 14:09:18.041743 134575774746368 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 37.271 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.380849838256836 s) (per-host) I0425 14:09:18.041862 134575774746368 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.330540s. I0425 14:09:25.408895 134575774746368 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 49.697557s. I0425 14:09:25.409168 134575783139072 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0425 14:09:25.409231 134575783139072 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0425 14:09:25.409276 134575783139072 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0425 14:09:25.410928 134575783139072 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0425 14:09:25.411108 134706853001024 checkpoint_manager.py:2032] [process=5][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9. I0425 14:09:25.411284 134706853001024 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0425 14:09:25.412261 134706853001024 metric_logger.py:196] completed step: 9, seconds: 0.148, TFLOP/s/device: 91.878, Tokens/s/device: 13848.880, 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 14:09:37 UTC 2026 EXIT_CODE=0