XPK Start: Thu Apr 23 15:01:15 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. 2026-04-23 15:01:40.490612: 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) I0423 15:01:40.705206 132598163208000 max_utils.py:273] Attempting to initialize the jax distributed system... I0423 15:01:49.747393 132598163208000 distributed.py:149] Starting JAX distributed service on [::]:8482 I0423 15:01:49.749740 132598163208000 distributed.py:172] Connecting to JAX distributed service on mt-13-scan-layers-true-tdozj-slice-job-0-0.mt-13-scan-layers-true-tdozj:8482 I0423 15:01:50.786755 132598163208000 max_utils.py:284] Jax distributed system initialized! I0423 15:01:56.102042 132598163208000 max_utils.py:800] System Information: Jax Version: 0.9.2 I0423 15:01:56.102173 132598163208000 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0423 15:01:56.102216 132598163208000 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 I0423 15:01:56.102257 132598163208000 train_utils.py:391] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0423 15:01:56.804259 132598163208000 maxtext_utils.py:1771] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0423 15:01:56.917347 132598163208000 checkpointing.py:688] Setting up checkpoint logger... I0423 15:01:56.917468 132598163208000 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0423 15:01:56.917522 132598163208000 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0423 15:01:56.917729 132598163208000 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 0x789835d3e600>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0423 15:01:59.895243 132598163208000 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0423 15:01:59.895488 132598163208000 checkpoint_manager.py:708] [process=6][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x78848c4a9190>}, handler_registry=None I0423 15:01:59.895755 132598163208000 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x78848c4a9190>` 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`. I0423 15:01:59.895811 132598163208000 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7884b42688f0>` 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`. I0423 15:01:59.895848 132598163208000 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 0x78848c4a9190>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x78848c4a9190>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7884b42688f0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7884b42688f0>}). I0423 15:01:59.896210 132598163208000 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0423 15:01:59.896288 132598163208000 async_checkpointer.py:192] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7884b42576a0> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0423 15:02:00.880539 132598163208000 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_13_scan_layers_true/checkpoints I0423 15:02:01.304389 132598163208000 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_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_13_scan_layers_true/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7884b47e5ca0> I0423 15:02:01.304560 132598163208000 checkpointing.py:302] Checkpoint manager created! I0423 15:02:02.280090 132598163208000 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0423 15:02:02.280227 132598163208000 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0423 15:02:03.678852 132598163208000 maxtext_utils.py:1889] decoder/decoder_norm/scale/value Shape: float32[2048] Physical: (None,) I0423 15:02:03.678972 132598163208000 maxtext_utils.py:1889] decoder/layers/mlp/wi_0/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0423 15:02:03.679024 132598163208000 maxtext_utils.py:1889] decoder/layers/mlp/wi_1/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0423 15:02:03.679067 132598163208000 maxtext_utils.py:1889] decoder/layers/mlp/wo/kernel/value Shape: float32[7168,16,2048] Physical: (None, None, 'fsdp') I0423 15:02:03.679119 132598163208000 maxtext_utils.py:1889] decoder/layers/post_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0423 15:02:03.679156 132598163208000 maxtext_utils.py:1889] decoder/layers/pre_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0423 15:02:03.679192 132598163208000 maxtext_utils.py:1889] decoder/layers/self_attention/key/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0423 15:02:03.679226 132598163208000 maxtext_utils.py:1889] decoder/layers/self_attention/out/kernel/value Shape: float32[16,16,128,2048] Physical: (None, None, None, 'fsdp') I0423 15:02:03.679262 132598163208000 maxtext_utils.py:1889] decoder/layers/self_attention/query/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0423 15:02:03.679302 132598163208000 maxtext_utils.py:1889] decoder/layers/self_attention/value/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0423 15:02:03.679334 132598163208000 maxtext_utils.py:1889] decoder/logits_dense/kernel/value Shape: float32[2048,32000] Physical: ('fsdp', None) I0423 15:02:03.679365 132598163208000 maxtext_utils.py:1889] token_embedder/embedding/value Shape: float32[32000,2048] Physical: (None, 'fsdp') I0423 15:02:04.084339 132598163208000 nnx_decoders.py:465] nnx_decoders/carry Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0423 15:02:04.084438 132598163208000 nnx_decoders.py:465] nnx_decoders/carry Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 15:02:04.089732 132598163208000 nnx_decoders.py:465] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0423 15:02:04.089788 132598163208000 nnx_decoders.py:465] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 15:02:04.106652 132598163208000 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 15:02:04.106710 132598163208000 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 15:02:04.122874 132598163208000 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 15:02:04.122937 132598163208000 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 15:02:04.148665 132598163208000 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 15:02:04.148733 132598163208000 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 15:02:04.170339 132598163208000 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 15:02:04.170439 132598163208000 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 15:02:04.186891 132598163208000 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 15:02:04.186951 132598163208000 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 15:02:04.217059 132598163208000 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0423 15:02:04.217144 132598163208000 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 15:02:04.237482 132598163208000 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0423 15:02:04.237545 132598163208000 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0423 15:02:15.296235 132598163208000 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. I0423 15:02:15.298576 132598163208000 metric_logger.py:301] number parameters: 1.104 billion I0423 15:02:26.687859 132598163208000 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0423 15:02:26.839756 132598163208000 checkpointing.py:798] Waited 0.15188121795654297 seconds for step 0 to finish before starting checkpointing. I0423 15:02:26.842384 132598163208000 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 15:02:26.844178 132598163208000 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 0 I0423 15:02:26.845620 132598163208000 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_13_scan_layers_true/checkpoints/0. I0423 15:02:27.145084 132598163208000 signaling_client.py:364] Using JaxDistributedSignalingClient I0423 15:02:27.146142 132598163208000 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array. I0423 15:02:27.146198 132598163208000 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 I0423 15:02:27.423870 132598163208000 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.279548s I0423 15:02:27.424042 132598163208000 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 5.346 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28853607177734375 s) (per-host) I0423 15:02:27.424113 132598163208000 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.288597s (batch_requests_ready=0.002944s, total_serialization_initiated=0.285583s, others=0.000069s) I0423 15:02:27.424216 132598163208000 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.292699s (all_items=0.000017s, per_item={'items': '0.00001693'}, temp_paths=0.292682) I0423 15:02:27.424993 132598163208000 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.58 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_13_scan_layers_true/checkpoints/0. I0423 15:02:27.425317 132472345384704 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 15:22:27.425284 I0423 15:02:27.432060 132598163208000 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0423 15:02:27.432341 132470213179136 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0423 15:02:27.432467 132598163208000 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_13_scan_layers_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776956546.8423657, 'wait_for_prev_duration_secs': 6.198883056640625e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776956546.844218, 'checkpointer_blocking_duration_secs': 0.5811991691589355, 'get_old_steps_start_time': 1776956547.4254422, 'get_old_steps_duration_secs': 2.8133392333984375e-05, 'checkpoint_manager_blocking_start_time': 1776956546.8401632, 'checkpoint_manager_blocking_duration_secs': 0.5922651290893555} I0423 15:02:27.432578 132598163208000 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0423 15:02:27.432645 132598163208000 max_utils.py:750] Memstats: After params initialized: I0423 15:02:27.432694 132598163208000 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0)) I0423 15:02:27.432726 132598163208000 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0)) I0423 15:02:27.432754 132598163208000 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0)) I0423 15:02:27.432780 132598163208000 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0)) I0423 15:02:27.748900 132598163208000 metric_logger.py:196] completed step: 0, seconds: 11.388, TFLOP/s/device: 1.193, Tokens/s/device: 179.835, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52786.469 I0423 15:02:27.939300 132598163208000 metric_logger.py:196] completed step: 1, seconds: 1.059, TFLOP/s/device: 12.827, Tokens/s/device: 1933.403, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52786.469 I0423 15:02:28.333767 132598163208000 metric_logger.py:196] completed step: 2, seconds: 0.044, TFLOP/s/device: 305.913, Tokens/s/device: 46110.548, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28632.133 I0423 15:02:28.481298 132598163208000 metric_logger.py:196] completed step: 3, seconds: 0.384, TFLOP/s/device: 35.366, Tokens/s/device: 5330.751, total_weights: 65536, loss: 9.732, lm_loss: 9.732, perplexity: 16855.789 I0423 15:02:28.776694 132598163208000 metric_logger.py:196] completed step: 4, seconds: 0.164, TFLOP/s/device: 82.820, Tokens/s/device: 12483.542, total_weights: 65536, loss: 9.274, lm_loss: 9.274, perplexity: 10661.594 I0423 15:02:28.784353 132598163208000 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.308, Tokens/s/device: 13913.705, total_weights: 65536, loss: 8.888, lm_loss: 8.888, perplexity: 7245.978 I0423 15:02:30.546586 2731 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0423 15:02:32.617452 132472304109312 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_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_13_scan_layers_true/checkpoints/0/items/array_metadatas/process_6 I0423 15:02:51.878572 132598163208000 metric_logger.py:196] completed step: 6, seconds: 0.296, TFLOP/s/device: 45.863, Tokens/s/device: 6912.963, total_weights: 65536, loss: 8.589, lm_loss: 8.589, perplexity: 5371.156 I0423 15:02:52.026119 132598163208000 metric_logger.py:196] completed step: 7, seconds: 22.948, TFLOP/s/device: 0.592, Tokens/s/device: 89.245, total_weights: 65536, loss: 8.380, lm_loss: 8.380, perplexity: 4360.465 I0423 15:02:52.173602 132598163208000 metric_logger.py:196] completed step: 8, seconds: 0.153, TFLOP/s/device: 88.702, Tokens/s/device: 13370.066, total_weights: 65536, loss: 8.251, lm_loss: 8.251, perplexity: 3831.256 I0423 15:02:52.321889 132598163208000 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0423 15:02:52.322517 132598163208000 checkpointing.py:798] Waited 0.0006403923034667969 seconds for step 9 to finish before starting checkpointing. I0423 15:02:52.324484 132598163208000 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 15:03:04.086938 132472345384704 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 42.748 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 36.95139122009277 s) (per-host) I0423 15:03:04.087045 132472345384704 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 36.661134s. I0423 15:03:12.611088 132472345384704 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 45.185158s. I0423 15:03:12.611395 132470213179136 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 15:03:12.611522 132470213179136 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0423 15:03:12.611575 132470213179136 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0423 15:03:12.613391 132470213179136 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0423 15:03:12.613568 132598163208000 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0. W0423 15:03:12.613705 132598163208000 checkpoint_manager.py:1452] Waiting for previous save to complete took 20.289222 seconds. If this number is high, consider checkpointing less frequently. I0423 15:03:12.615653 132598163208000 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 9 I0423 15:03:12.617685 132598163208000 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_13_scan_layers_true/checkpoints/9. I0423 15:03:13.206758 132598163208000 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array. I0423 15:03:13.206854 132598163208000 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 I0423 15:03:13.241129 132598163208000 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.036110s I0423 15:03:13.241288 132598163208000 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 35.655 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.043263912200927734 s) (per-host) I0423 15:03:13.241339 132598163208000 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.043324s (batch_requests_ready=0.002759s, total_serialization_initiated=0.040497s, others=0.000067s) I0423 15:03:13.241431 132598163208000 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.047354s (all_items=0.000015s, per_item={'items': '0.00001478'}, temp_paths=0.047340) I0423 15:03:13.242141 132598163208000 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.63 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_13_scan_layers_true/checkpoints/9. I0423 15:03:13.242423 132470213179136 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 15:23:13.242398 I0423 15:03:13.248555 132598163208000 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0423 15:03:13.248831 132472304109312 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0423 15:03:13.248992 132598163208000 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_13_scan_layers_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776956572.3244543, 'wait_for_prev_duration_secs': 20.28922152519226, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776956592.6156929, 'checkpointer_blocking_duration_secs': 0.6268332004547119, 'get_old_steps_start_time': 1776956593.2425513, 'get_old_steps_duration_secs': 2.956390380859375e-05, 'checkpoint_manager_blocking_start_time': 1776956572.32274, 'checkpoint_manager_blocking_duration_secs': 20.92621946334839} I0423 15:03:13.249123 132598163208000 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0423 15:03:13.249171 132598163208000 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 15:03:19.014066 132444544022272 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_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_13_scan_layers_true/checkpoints/9/items/array_metadatas/process_6 I0423 15:03:55.820654 132470213179136 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 37.060 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.62259006500244 s) (per-host) I0423 15:03:55.820779 132470213179136 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.578277s. I0423 15:04:03.479423 132470213179136 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 50.236905s. I0423 15:04:03.479699 132472304109312 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 15:04:03.479825 132472304109312 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0423 15:04:03.479874 132472304109312 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0423 15:04:03.481244 132472304109312 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0423 15:04:03.481429 132598163208000 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9. I0423 15:04:03.481606 132598163208000 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 15:04:03.482598 132598163208000 metric_logger.py:196] completed step: 9, seconds: 0.148, TFLOP/s/device: 91.904, Tokens/s/device: 13852.814, 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: Thu Apr 23 15:04:15 UTC 2026 EXIT_CODE=0