XPK Start: Wed Apr 22 14:21:31 UTC 2026 PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used. 2026-04-22 14:21:55.414594: E external/local_xla/xla/stream_executor/cuda/cuda_platform.cc:51] failed call to cuInit: INTERNAL: CUDA error: Failed call to cuInit: UNKNOWN ERROR (303) I0422 14:21:55.594986 137615375595328 max_utils.py:273] Attempting to initialize the jax distributed system... I0422 14:22:04.636558 137615375595328 distributed.py:149] Starting JAX distributed service on [::]:8482 I0422 14:22:04.638941 137615375595328 distributed.py:172] Connecting to JAX distributed service on mt-03-dropout-6oo07-slice-job-0-0.mt-03-dropout-6oo07:8482 I0422 14:22:06.315119 137615375595328 max_utils.py:284] Jax distributed system initialized! I0422 14:22:12.432848 137615375595328 max_utils.py:800] System Information: Jax Version: 0.9.2 I0422 14:22:12.432953 137615375595328 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0422 14:22:12.432992 137615375595328 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 I0422 14:22:12.433026 137615375595328 train_utils.py:378] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0422 14:22:13.134090 137615375595328 maxtext_utils.py:1718] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0422 14:22:13.248173 137615375595328 checkpointing.py:688] Setting up checkpoint logger... I0422 14:22:13.248290 137615375595328 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0422 14:22:13.248335 137615375595328 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0422 14:22:13.248542 137615375595328 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 0x7d2875b1cad0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0422 14:22:16.230980 137615375595328 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0422 14:22:16.231235 137615375595328 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 0x7d130c5bc230>}, handler_registry=None I0422 14:22:16.231480 137615375595328 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7d130c5bc230>` for item "items" and save args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>` to `_handler_registry`. I0422 14:22:16.231535 137615375595328 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d130c14f080>` for item "metrics" and save args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>` to `_handler_registry`. I0422 14:22:16.231571 137615375595328 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 0x7d130c5bc230>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7d130c5bc230>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d130c14f080>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d130c14f080>}). I0422 14:22:16.231887 137615375595328 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0422 14:22:16.231958 137615375595328 async_checkpointer.py:192] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7d130c589da0> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0422 14:22:18.826854 137615375595328 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/nnx_xpk_feat_nnx_post_train_fixes_20260422_123906_03_dropout/checkpoints I0422 14:22:18.991634 137615375595328 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_20260422_123906/nnx_xpk_feat_nnx_post_train_fixes_20260422_123906_03_dropout/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7d130c12f560> I0422 14:22:18.991802 137615375595328 checkpointing.py:302] Checkpoint manager created! I0422 14:22:19.372315 137615375595328 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0422 14:22:19.372434 137615375595328 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0422 14:22:20.777787 137615375595328 maxtext_utils.py:1836] decoder/decoder_norm/scale/value Shape: float32[2048] Physical: (None,) I0422 14:22:20.777901 137615375595328 maxtext_utils.py:1836] decoder/layers/mlp/wi_0/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0422 14:22:20.777952 137615375595328 maxtext_utils.py:1836] decoder/layers/mlp/wi_1/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0422 14:22:20.777994 137615375595328 maxtext_utils.py:1836] decoder/layers/mlp/wo/kernel/value Shape: float32[7168,16,2048] Physical: (None, None, 'fsdp') I0422 14:22:20.778031 137615375595328 maxtext_utils.py:1836] decoder/layers/post_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0422 14:22:20.778065 137615375595328 maxtext_utils.py:1836] decoder/layers/pre_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0422 14:22:20.778115 137615375595328 maxtext_utils.py:1836] decoder/layers/self_attention/key/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0422 14:22:20.778153 137615375595328 maxtext_utils.py:1836] decoder/layers/self_attention/out/kernel/value Shape: float32[16,16,128,2048] Physical: (None, None, None, 'fsdp') I0422 14:22:20.778188 137615375595328 maxtext_utils.py:1836] decoder/layers/self_attention/query/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0422 14:22:20.778220 137615375595328 maxtext_utils.py:1836] decoder/layers/self_attention/value/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0422 14:22:20.778251 137615375595328 maxtext_utils.py:1836] decoder/logits_dense/kernel/value Shape: float32[2048,32000] Physical: ('fsdp', None) I0422 14:22:20.778282 137615375595328 maxtext_utils.py:1836] token_embedder/embedding/value Shape: float32[32000,2048] Physical: (None, 'fsdp') I0422 14:22:21.181196 137615375595328 nnx_decoders.py:465] nnx_decoders/carry Logical: bfloat16[32,128,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0422 14:22:21.181288 137615375595328 nnx_decoders.py:465] nnx_decoders/carry Physical: bfloat16[32,128,2048]....................................... ('fsdp', None, None). I0422 14:22:21.187110 137615375595328 nnx_decoders.py:465] Unknown Logical: bfloat16[32,128,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0422 14:22:21.187167 137615375595328 nnx_decoders.py:465] Unknown Physical: bfloat16[32,128,2048]....................................... ('fsdp', None, None). I0422 14:22:21.203423 137615375595328 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,128,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0422 14:22:21.203483 137615375595328 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,128,2048]....................................... ('fsdp', None, None). I0422 14:22:21.218966 137615375595328 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,128,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0422 14:22:21.219029 137615375595328 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,128,2048]....................................... ('fsdp', None, None). I0422 14:22:21.242892 137615375595328 attentions.py:1154] attentions/query Logical: bfloat16[32,128,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0422 14:22:21.242961 137615375595328 attentions.py:1154] attentions/query Physical: bfloat16[32,128,16,128]..................................... ('fsdp', None, None, None). I0422 14:22:21.258742 137615375595328 attentions.py:1155] attentions/key Logical: bfloat16[32,128,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0422 14:22:21.258805 137615375595328 attentions.py:1155] attentions/key Physical: bfloat16[32,128,16,128]..................................... ('fsdp', None, None, None). I0422 14:22:21.274542 137615375595328 attentions.py:1156] attentions/value Logical: bfloat16[32,128,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0422 14:22:21.274606 137615375595328 attentions.py:1156] attentions/value Physical: bfloat16[32,128,16,128]..................................... ('fsdp', None, None, None). I0422 14:22:21.304445 137615375595328 attentions.py:1197] attentions/out Logical: bfloat16[32,128,16,128]..................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0422 14:22:21.304515 137615375595328 attentions.py:1197] attentions/out Physical: bfloat16[32,128,16,128]..................................... ('fsdp', None, None, None). I0422 14:22:21.330295 137615375595328 linears.py:525] linears/x Logical: bfloat16[32,128,7168]....................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0422 14:22:21.330362 137615375595328 linears.py:525] linears/x Physical: bfloat16[32,128,7168]....................................... ('fsdp', None, None). I0422 14:22:25.060561 137615375595328 max_utils.py:791] Total memory size: 0.8 GB, Output size: 0.4 GB, Temp size: 0.4 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB. I0422 14:22:25.062865 137615375595328 metric_logger.py:301] number parameters: 1.104 billion I0422 14:22:29.063563 137615375595328 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0422 14:22:29.240009 137615375595328 checkpointing.py:798] Waited 0.17642998695373535 seconds for step 0 to finish before starting checkpointing. I0422 14:22:29.242285 137615375595328 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0422 14:22:29.244483 137615375595328 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 0 I0422 14:22:29.245834 137615375595328 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/nnx_xpk_feat_nnx_post_train_fixes_20260422_123906_03_dropout/checkpoints/0. I0422 14:22:29.962169 137615375595328 signaling_client.py:364] Using JaxDistributedSignalingClient I0422 14:22:29.963047 137615375595328 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array. I0422 14:22:29.963124 137615375595328 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False I0422 14:22:30.239585 137615375595328 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.278256s I0422 14:22:30.239763 137615375595328 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 5.364 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28757667541503906 s) (per-host) I0422 14:22:30.239818 137615375595328 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.287641s (batch_requests_ready=0.003207s, total_serialization_initiated=0.284362s, others=0.000072s) I0422 14:22:30.239922 137615375595328 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.291756s (all_items=0.000018s, per_item={'items': '0.00001812'}, temp_paths=0.291738) I0422 14:22:30.240702 137615375595328 event_tracking.py:125] [process=6] [async] Finished blocking save in 1.00 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/nnx_xpk_feat_nnx_post_train_fixes_20260422_123906_03_dropout/checkpoints/0. I0422 14:22:30.241038 137486030321408 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-22 14:42:30.241000 I0422 14:22:30.252155 137615375595328 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0422 14:22:30.252460 137484948186880 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0422 14:22:30.252617 137615375595328 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/nnx_xpk_feat_nnx_post_train_fixes_20260422_123906_03_dropout/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776867749.2422662, 'wait_for_prev_duration_secs': 6.771087646484375e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776867749.244523, 'checkpointer_blocking_duration_secs': 0.9966413974761963, 'get_old_steps_start_time': 1776867750.241188, 'get_old_steps_duration_secs': 3.0517578125e-05, 'checkpoint_manager_blocking_start_time': 1776867749.2404454, 'checkpoint_manager_blocking_duration_secs': 1.0121331214904785} I0422 14:22:30.252724 137615375595328 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0422 14:22:30.252794 137615375595328 max_utils.py:750] Memstats: After params initialized: I0422 14:22:30.252843 137615375595328 max_utils.py:756] Using (GB) 0.41 / 31.25 (1.312000%) on TPU_24(process=6,(0,6,0,0)) I0422 14:22:30.252875 137615375595328 max_utils.py:756] Using (GB) 0.41 / 31.25 (1.312000%) on TPU_25(process=6,(1,6,0,0)) I0422 14:22:30.252901 137615375595328 max_utils.py:756] Using (GB) 0.41 / 31.25 (1.312000%) on TPU_28(process=6,(0,7,0,0)) I0422 14:22:30.252932 137615375595328 max_utils.py:756] Using (GB) 0.41 / 31.25 (1.312000%) on TPU_29(process=6,(1,7,0,0)) I0422 14:22:30.572172 137615375595328 metric_logger.py:196] completed step: 0, seconds: 4.000, TFLOP/s/device: 0.200, Tokens/s/device: 32.003, total_weights: 4096, loss: 10.874, lm_loss: 10.874, perplexity: 52805.141 I0422 14:22:30.662983 137615375595328 metric_logger.py:196] completed step: 1, seconds: 1.507, TFLOP/s/device: 0.532, Tokens/s/device: 84.957, total_weights: 4096, loss: 10.892, lm_loss: 10.892, perplexity: 53764.488 I0422 14:22:31.087128 137615375595328 metric_logger.py:196] completed step: 2, seconds: 0.021, TFLOP/s/device: 37.626, Tokens/s/device: 6013.625, total_weights: 4096, loss: 9.969, lm_loss: 9.969, perplexity: 21350.100 I0422 14:22:31.157546 137615375595328 metric_logger.py:196] completed step: 3, seconds: 0.414, TFLOP/s/device: 1.934, Tokens/s/device: 309.053, total_weights: 4096, loss: 9.125, lm_loss: 9.125, perplexity: 9186.262 I0422 14:22:31.299404 137615375595328 metric_logger.py:196] completed step: 4, seconds: 0.088, TFLOP/s/device: 9.148, Tokens/s/device: 1462.122, total_weights: 4096, loss: 8.469, lm_loss: 8.469, perplexity: 4765.735 I0422 14:22:31.307119 137615375595328 metric_logger.py:196] completed step: 5, seconds: 0.070, TFLOP/s/device: 11.431, Tokens/s/device: 1827.032, total_weights: 4096, loss: 7.908, lm_loss: 7.908, perplexity: 2719.938 I0422 14:22:33.553605 2841 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0422 14:22:35.567506 137486013536000 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_20260422_123906/nnx_xpk_feat_nnx_post_train_fixes_20260422_123906_03_dropout/checkpoints/0/items/array_metadatas/process_6 I0422 14:22:41.116526 137615375595328 metric_logger.py:196] completed step: 6, seconds: 0.143, TFLOP/s/device: 5.616, Tokens/s/device: 897.584, total_weights: 4096, loss: 7.554, lm_loss: 7.554, perplexity: 1909.063 I0422 14:22:41.187174 137615375595328 metric_logger.py:196] completed step: 7, seconds: 9.740, TFLOP/s/device: 0.082, Tokens/s/device: 13.141, total_weights: 4096, loss: 7.313, lm_loss: 7.313, perplexity: 1500.206 I0422 14:22:41.257701 137615375595328 metric_logger.py:196] completed step: 8, seconds: 0.076, TFLOP/s/device: 10.530, Tokens/s/device: 1682.882, total_weights: 4096, loss: 7.091, lm_loss: 7.091, perplexity: 1200.912 I0422 14:22:41.329037 137615375595328 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0422 14:22:41.329747 137615375595328 checkpointing.py:798] Waited 0.0007205009460449219 seconds for step 9 to finish before starting checkpointing. I0422 14:22:41.331602 137615375595328 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0422 14:23:03.096115 137486030321408 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 47.659 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 33.14388084411621 s) (per-host) I0422 14:23:03.096224 137486030321408 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 32.854517s. I0422 14:23:11.431602 137486030321408 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 41.189877s. I0422 14:23:11.431892 137484948186880 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0422 14:23:11.432007 137484948186880 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0422 14:23:11.432057 137484948186880 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0422 14:23:11.433669 137484948186880 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0422 14:23:11.433836 137615375595328 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. W0422 14:23:11.433971 137615375595328 checkpoint_manager.py:1452] Waiting for previous save to complete took 30.102368 seconds. If this number is high, consider checkpointing less frequently. I0422 14:23:11.435703 137615375595328 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 9 I0422 14:23:11.437796 137615375595328 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/nnx_xpk_feat_nnx_post_train_fixes_20260422_123906_03_dropout/checkpoints/9. I0422 14:23:12.190065 137615375595328 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array. I0422 14:23:12.190177 137615375595328 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False I0422 14:23:12.228026 137615375595328 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.039463s I0422 14:23:12.228208 137615375595328 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 32.976 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04677867889404297 s) (per-host) I0422 14:23:12.228282 137615375595328 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.046855s (batch_requests_ready=0.002898s, total_serialization_initiated=0.043874s, others=0.000083s) I0422 14:23:12.228401 137615375595328 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.050945s (all_items=0.000015s, per_item={'items': '0.00001454'}, temp_paths=0.050930) I0422 14:23:12.229217 137615375595328 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.79 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/nnx_xpk_feat_nnx_post_train_fixes_20260422_123906_03_dropout/checkpoints/9. I0422 14:23:12.229566 137484948186880 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-22 14:43:12.229528 I0422 14:23:12.232088 137615375595328 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0422 14:23:12.232425 137486013536000 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0422 14:23:12.232565 137615375595328 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/nnx_xpk_feat_nnx_post_train_fixes_20260422_123906_03_dropout/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776867761.331572, 'wait_for_prev_duration_secs': 30.102368354797363, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776867791.4357412, 'checkpointer_blocking_duration_secs': 0.7939672470092773, 'get_old_steps_start_time': 1776867792.2297316, 'get_old_steps_duration_secs': 3.314018249511719e-05, 'checkpoint_manager_blocking_start_time': 1776867761.3299825, 'checkpoint_manager_blocking_duration_secs': 30.902550220489502} I0422 14:23:12.232724 137615375595328 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0422 14:23:12.232771 137615375595328 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0422 14:23:17.455812 137462781196032 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_20260422_123906/nnx_xpk_feat_nnx_post_train_fixes_20260422_123906_03_dropout/checkpoints/9/items/array_metadatas/process_6 I0422 14:23:52.956739 137484948186880 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 38.739 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 40.775277614593506 s) (per-host) I0422 14:23:52.956866 137484948186880 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 40.727183s. I0422 14:23:59.655549 137484948186880 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 47.425852s. I0422 14:23:59.655858 137486013536000 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0422 14:23:59.655973 137486013536000 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0422 14:23:59.656020 137486013536000 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0422 14:23:59.658447 137486013536000 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0422 14:23:59.658622 137615375595328 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. I0422 14:23:59.658790 137615375595328 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0422 14:23:59.659897 137615375595328 metric_logger.py:196] completed step: 9, seconds: 0.072, TFLOP/s/device: 11.162, Tokens/s/device: 1783.922, total_weights: 4096, loss: 7.016, lm_loss: 7.016, perplexity: 1113.843 Per train step: Total TFLOPs: 0.80 split as 99.60% learnable weight flops and 0.40% attention flops XPK End: Wed Apr 22 14:24:11 UTC 2026 EXIT_CODE=0