XPK Start: Fri Apr 17 04:51:02 UTC 2026 PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used. 2026-04-17 04:51:26.178832: 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) I0417 04:51:26.358471 134731647133504 max_utils.py:273] Attempting to initialize the jax distributed system... I0417 04:51:35.399014 134731647133504 distributed.py:149] Starting JAX distributed service on [::]:8482 I0417 04:51:35.401301 134731647133504 distributed.py:172] Connecting to JAX distributed service on mt-04-int8-7ed4r-slice-job-0-0.mt-04-int8-7ed4r:8482 I0417 04:51:36.611320 134731647133504 max_utils.py:284] Jax distributed system initialized! I0417 04:51:42.666120 134731647133504 max_utils.py:800] System Information: Jax Version: 0.9.2 I0417 04:51:42.666222 134731647133504 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0417 04:51:42.666263 134731647133504 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 I0417 04:51:42.666298 134731647133504 train_utils.py:377] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0417 04:51:43.342326 134731647133504 maxtext_utils.py:1687] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0417 04:51:43.892639 134731647133504 checkpointing.py:688] Setting up checkpoint logger... I0417 04:51:43.892753 134731647133504 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0417 04:51:43.892802 134731647133504 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0417 04:51:43.893027 134731647133504 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 0x7a8909714e00>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0417 04:51:47.974965 134731647133504 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0417 04:51:47.975200 134731647133504 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 0x7a74ac4b0c80>}, handler_registry=None I0417 04:51:47.975442 134731647133504 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7a74ac4b0c80>` 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`. I0417 04:51:47.975490 134731647133504 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a74dc085d60>` 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`. I0417 04:51:47.975525 134731647133504 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 0x7a74ac4b0c80>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7a74ac4b0c80>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a74dc085d60>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a74dc085d60>}). I0417 04:51:47.975876 134731647133504 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0417 04:51:47.975948 134731647133504 async_checkpointer.py:192] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7a74dc07ae80> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0417 04:51:49.303181 134731647133504 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260417_023710/nnx_xpk_feat_nnx_post_train_fixes_20260417_023710_04_int8/checkpoints I0417 04:51:49.329010 134731647133504 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_20260417_023710/nnx_xpk_feat_nnx_post_train_fixes_20260417_023710_04_int8/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7a74dc120e90> I0417 04:51:49.329159 134731647133504 checkpointing.py:302] Checkpoint manager created! I0417 04:51:50.693717 134731647133504 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0417 04:51:50.693852 134731647133504 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0417 04:51:52.994532 134731647133504 maxtext_utils.py:1805] decoder/decoder_norm/scale/value Shape: float32[2048] Physical: (None,) I0417 04:51:52.994655 134731647133504 maxtext_utils.py:1805] decoder/layers/mlp/wi_0/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0417 04:51:52.994711 134731647133504 maxtext_utils.py:1805] decoder/layers/mlp/wi_1/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0417 04:51:52.994756 134731647133504 maxtext_utils.py:1805] decoder/layers/mlp/wo/kernel/value Shape: float32[7168,16,2048] Physical: (None, None, 'fsdp') I0417 04:51:52.994794 134731647133504 maxtext_utils.py:1805] decoder/layers/post_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0417 04:51:52.994842 134731647133504 maxtext_utils.py:1805] decoder/layers/pre_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0417 04:51:52.994883 134731647133504 maxtext_utils.py:1805] decoder/layers/self_attention/key/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0417 04:51:52.994920 134731647133504 maxtext_utils.py:1805] decoder/layers/self_attention/out/kernel/value Shape: float32[16,16,128,2048] Physical: (None, None, None, 'fsdp') I0417 04:51:52.994955 134731647133504 maxtext_utils.py:1805] decoder/layers/self_attention/query/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0417 04:51:52.994989 134731647133504 maxtext_utils.py:1805] decoder/layers/self_attention/value/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0417 04:51:52.995022 134731647133504 maxtext_utils.py:1805] decoder/logits_dense/kernel/value Shape: float32[2048,32000] Physical: ('fsdp', None) I0417 04:51:52.995053 134731647133504 maxtext_utils.py:1805] token_embedder/embedding/value Shape: float32[32000,2048] Physical: (None, 'fsdp') I0417 04:51:53.410329 134731647133504 nnx_decoders.py:465] nnx_decoders/carry Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0417 04:51:53.410427 134731647133504 nnx_decoders.py:465] nnx_decoders/carry Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0417 04:51:53.415702 134731647133504 nnx_decoders.py:465] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0417 04:51:53.415758 134731647133504 nnx_decoders.py:465] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0417 04:51:53.432130 134731647133504 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0417 04:51:53.432199 134731647133504 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0417 04:51:53.448370 134731647133504 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0417 04:51:53.448431 134731647133504 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0417 04:51:53.528909 134731647133504 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0417 04:51:53.528997 134731647133504 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0417 04:51:53.544846 134731647133504 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0417 04:51:53.544907 134731647133504 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0417 04:51:53.560756 134731647133504 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0417 04:51:53.560835 134731647133504 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0417 04:51:53.591309 134731647133504 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0417 04:51:53.591393 134731647133504 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0417 04:51:53.669371 134731647133504 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0417 04:51:53.669459 134731647133504 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0417 04:52:07.676038 134731647133504 max_utils.py:791] Total memory size: 1.8 GB, Output size: 0.4 GB, Temp size: 1.4 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB. I0417 04:52:07.679628 134731647133504 metric_logger.py:289] number parameters: 1.104 billion I0417 04:52:22.233408 134731647133504 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0417 04:52:22.472008 134731647133504 checkpointing.py:798] Waited 0.23858237266540527 seconds for step 0 to finish before starting checkpointing. I0417 04:52:22.474283 134731647133504 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0417 04:52:22.476291 134731647133504 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 0 I0417 04:52:22.477719 134731647133504 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260417_023710/nnx_xpk_feat_nnx_post_train_fixes_20260417_023710_04_int8/checkpoints/0. I0417 04:52:23.213306 134731647133504 signaling_client.py:364] Using JaxDistributedSignalingClient I0417 04:52:23.214323 134731647133504 jax_array_handlers.py:360] Scheduling D2H of 111 prioritized jax.Array. I0417 04:52:23.214382 134731647133504 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 I0417 04:52:23.498256 134731647133504 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.286559s I0417 04:52:23.498429 134731647133504 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 5.129 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.300734281539917 s) (per-host) I0417 04:52:23.498485 134731647133504 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.300801s (batch_requests_ready=0.004714s, total_serialization_initiated=0.296013s, others=0.000074s) I0417 04:52:23.498608 134731647133504 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.304933s (all_items=0.000017s, per_item={'items': '0.00001717'}, temp_paths=0.304916) I0417 04:52:23.499419 134731647133504 event_tracking.py:125] [process=6] [async] Finished blocking save in 1.02 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260417_023710/nnx_xpk_feat_nnx_post_train_fixes_20260417_023710_04_int8/checkpoints/0. I0417 04:52:23.499775 134600584066816 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-17 05:12:23.499736 I0417 04:52:23.501847 134731647133504 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0417 04:52:23.502096 134600529524480 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0417 04:52:23.502249 134731647133504 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260417_023710/nnx_xpk_feat_nnx_post_train_fixes_20260417_023710_04_int8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776401542.4742653, 'wait_for_prev_duration_secs': 6.079673767089844e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776401542.4763308, 'checkpointer_blocking_duration_secs': 1.023613691329956, 'get_old_steps_start_time': 1776401543.499971, 'get_old_steps_duration_secs': 2.86102294921875e-05, 'checkpoint_manager_blocking_start_time': 1776401542.4724507, 'checkpoint_manager_blocking_duration_secs': 1.0297601222991943} I0417 04:52:23.502365 134731647133504 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0417 04:52:23.502445 134731647133504 max_utils.py:750] Memstats: After params initialized: I0417 04:52:23.502495 134731647133504 max_utils.py:756] Using (GB) 0.44 / 31.25 (1.408000%) on TPU_24(process=6,(0,6,0,0)) I0417 04:52:23.502529 134731647133504 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0)) I0417 04:52:23.502557 134731647133504 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0)) I0417 04:52:23.502580 134731647133504 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0)) I0417 04:52:23.818659 134731647133504 metric_logger.py:185] completed step: 0, seconds: 14.552, TFLOP/s/device: 0.934, Tokens/s/device: 140.738, total_weights: 65536, loss: 10.872 I0417 04:52:24.071506 134731647133504 metric_logger.py:185] completed step: 1, seconds: 1.583, TFLOP/s/device: 8.583, Tokens/s/device: 1293.726, total_weights: 65536, loss: 10.872 I0417 04:52:24.514794 134731647133504 metric_logger.py:185] completed step: 2, seconds: 0.027, TFLOP/s/device: 502.408, Tokens/s/device: 75728.443, total_weights: 65536, loss: 10.260 I0417 04:52:24.744391 134731647133504 metric_logger.py:185] completed step: 3, seconds: 0.422, TFLOP/s/device: 32.164, Tokens/s/device: 4848.175, total_weights: 65536, loss: 9.728 I0417 04:52:25.205069 134731647133504 metric_logger.py:185] completed step: 4, seconds: 0.256, TFLOP/s/device: 52.978, Tokens/s/device: 7985.433, total_weights: 65536, loss: 9.271 I0417 04:52:25.213895 134731647133504 metric_logger.py:185] completed step: 5, seconds: 0.230, TFLOP/s/device: 59.198, Tokens/s/device: 8922.892, total_weights: 65536, loss: 8.885 I0417 04:52:27.616210 2881 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0417 04:52:30.020308 134600537917184 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 111 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260417_023710/nnx_xpk_feat_nnx_post_train_fixes_20260417_023710_04_int8/checkpoints/0/items/array_metadatas/process_6 I0417 04:52:54.059926 134731647133504 metric_logger.py:185] completed step: 6, seconds: 0.461, TFLOP/s/device: 29.486, Tokens/s/device: 4444.502, total_weights: 65536, loss: 8.586 I0417 04:52:54.289210 134731647133504 metric_logger.py:185] completed step: 7, seconds: 28.619, TFLOP/s/device: 0.475, Tokens/s/device: 71.560, total_weights: 65536, loss: 8.378 I0417 04:52:54.518538 134731647133504 metric_logger.py:185] completed step: 8, seconds: 0.235, TFLOP/s/device: 57.721, Tokens/s/device: 8700.307, total_weights: 65536, loss: 8.249 I0417 04:52:54.749724 134731647133504 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0417 04:52:54.750756 134731647133504 checkpointing.py:798] Waited 0.0010406970977783203 seconds for step 9 to finish before starting checkpointing. I0417 04:52:54.752845 134731647133504 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0417 04:52:57.423440 134600584066816 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 46.152 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 34.225706815719604 s) (per-host) I0417 04:52:57.423550 134600584066816 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 33.923645s. I0417 04:53:05.617217 134600584066816 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 42.117296s. I0417 04:53:05.617519 134600529524480 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0417 04:53:05.617641 134600529524480 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0417 04:53:05.617694 134600529524480 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0417 04:53:05.620227 134600529524480 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0417 04:53:05.620412 134731647133504 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. W0417 04:53:05.620546 134731647133504 checkpoint_manager.py:1452] Waiting for previous save to complete took 10.867716 seconds. If this number is high, consider checkpointing less frequently. I0417 04:53:05.622982 134731647133504 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 9 I0417 04:53:05.625071 134731647133504 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260417_023710/nnx_xpk_feat_nnx_post_train_fixes_20260417_023710_04_int8/checkpoints/9. I0417 04:53:06.358376 134731647133504 jax_array_handlers.py:360] Scheduling D2H of 111 prioritized jax.Array. I0417 04:53:06.358475 134731647133504 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 I0417 04:53:06.404457 134731647133504 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.048697s I0417 04:53:06.404632 134731647133504 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 25.455 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.060599565505981445 s) (per-host) I0417 04:53:06.404687 134731647133504 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.060664s (batch_requests_ready=0.004281s, total_serialization_initiated=0.056304s, others=0.000079s) I0417 04:53:06.404805 134731647133504 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.064929s (all_items=0.000016s, per_item={'items': '0.00001621'}, temp_paths=0.064912) I0417 04:53:06.405502 134731647133504 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.78 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260417_023710/nnx_xpk_feat_nnx_post_train_fixes_20260417_023710_04_int8/checkpoints/9. I0417 04:53:06.405874 134600529524480 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-17 05:13:06.405836 I0417 04:53:06.407774 134731647133504 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0417 04:53:06.408076 134600537917184 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0417 04:53:06.408210 134731647133504 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260417_023710/nnx_xpk_feat_nnx_post_train_fixes_20260417_023710_04_int8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776401574.752797, 'wait_for_prev_duration_secs': 10.867716073989868, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776401585.6230206, 'checkpointer_blocking_duration_secs': 0.7829961776733398, 'get_old_steps_start_time': 1776401586.4060385, 'get_old_steps_duration_secs': 3.266334533691406e-05, 'checkpoint_manager_blocking_start_time': 1776401574.7510805, 'checkpoint_manager_blocking_duration_secs': 11.657096147537231} I0417 04:53:06.408369 134731647133504 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0417 04:53:06.408415 134731647133504 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0417 04:53:13.681197 134596376188672 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 111 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260417_023710/nnx_xpk_feat_nnx_post_train_fixes_20260417_023710_04_int8/checkpoints/9/items/array_metadatas/process_6 I0417 04:53:49.561851 134600529524480 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 36.550 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 43.217767000198364 s) (per-host) I0417 04:53:49.561978 134600529524480 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 43.155989s. I0417 04:53:58.520381 134600529524480 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 52.114378s. I0417 04:53:58.520743 134600537917184 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0417 04:53:58.520883 134600537917184 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0417 04:53:58.520933 134600537917184 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0417 04:53:58.523051 134600537917184 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0417 04:53:58.523236 134731647133504 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. I0417 04:53:58.523426 134731647133504 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0417 04:53:58.524155 134731647133504 metric_logger.py:185] completed step: 9, seconds: 0.229, TFLOP/s/device: 59.218, Tokens/s/device: 8926.042, total_weights: 65536, loss: 8.174 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Fri Apr 17 04:54:07 UTC 2026 EXIT_CODE=0