XPK Start: Fri Apr 24 13:41:20 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. 2026-04-24 13:41:45.753061: 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) I0424 13:41:45.965963 133851429095232 max_utils.py:273] Attempting to initialize the jax distributed system... I0424 13:41:55.007399 133851429095232 distributed.py:149] Starting JAX distributed service on [::]:8482 I0424 13:41:55.009687 133851429095232 distributed.py:172] Connecting to JAX distributed service on mt-05-fp8-gyb4p-slice-job-0-0.mt-05-fp8-gyb4p:8482 I0424 13:41:56.136047 133851429095232 max_utils.py:284] Jax distributed system initialized! I0424 13:42:02.332214 133851429095232 max_utils.py:800] System Information: Jax Version: 0.9.2 I0424 13:42:02.332325 133851429095232 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0424 13:42:02.332366 133851429095232 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 I0424 13:42:02.332402 133851429095232 train_utils.py:391] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0424 13:42:03.028422 133851429095232 maxtext_utils.py:1771] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0424 13:42:03.460857 133851429095232 checkpointing.py:688] Setting up checkpoint logger... I0424 13:42:03.460980 133851429095232 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0424 13:42:03.461027 133851429095232 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0424 13:42:03.461273 133851429095232 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 0x79bc16518dd0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0424 13:42:06.405658 133851429095232 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0424 13:42:06.405948 133851429095232 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 0x79a6d87913d0>}, handler_registry=None I0424 13:42:06.406270 133851429095232 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x79a6d87913d0>` 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`. I0424 13:42:06.406336 133851429095232 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x79a7d41b26c0>` 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`. I0424 13:42:06.406384 133851429095232 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 0x79a6d87913d0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x79a6d87913d0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x79a7d41b26c0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x79a7d41b26c0>}). I0424 13:42:06.406806 133851429095232 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0424 13:42:06.406899 133851429095232 async_checkpointer.py:192] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x79a7d41d7d80> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0424 13:42:07.147604 133851429095232 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/nnx_xpk_feat_nnx_post_train_fixes_20260424_120657_05_fp8/checkpoints I0424 13:42:07.197192 133851429095232 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_20260424_120657/nnx_xpk_feat_nnx_post_train_fixes_20260424_120657_05_fp8/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x79a7d41e3500> I0424 13:42:07.197345 133851429095232 checkpointing.py:302] Checkpoint manager created! I0424 13:42:08.470385 133851429095232 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0424 13:42:08.470514 133851429095232 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0424 13:42:10.601480 133851429095232 maxtext_utils.py:1889] decoder/decoder_norm/scale/value Shape: float32[2048] Physical: (None,) I0424 13:42:10.601601 133851429095232 maxtext_utils.py:1889] decoder/layers/mlp/wi_0/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0424 13:42:10.601653 133851429095232 maxtext_utils.py:1889] decoder/layers/mlp/wi_1/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0424 13:42:10.601696 133851429095232 maxtext_utils.py:1889] decoder/layers/mlp/wo/kernel/value Shape: float32[7168,16,2048] Physical: (None, None, 'fsdp') I0424 13:42:10.601733 133851429095232 maxtext_utils.py:1889] decoder/layers/post_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0424 13:42:10.601767 133851429095232 maxtext_utils.py:1889] decoder/layers/pre_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0424 13:42:10.601801 133851429095232 maxtext_utils.py:1889] decoder/layers/self_attention/key/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0424 13:42:10.601836 133851429095232 maxtext_utils.py:1889] decoder/layers/self_attention/out/kernel/value Shape: float32[16,16,128,2048] Physical: (None, None, None, 'fsdp') I0424 13:42:10.601870 133851429095232 maxtext_utils.py:1889] decoder/layers/self_attention/query/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0424 13:42:10.601903 133851429095232 maxtext_utils.py:1889] decoder/layers/self_attention/value/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0424 13:42:10.601934 133851429095232 maxtext_utils.py:1889] decoder/logits_dense/kernel/value Shape: float32[2048,32000] Physical: ('fsdp', None) I0424 13:42:10.601965 133851429095232 maxtext_utils.py:1889] token_embedder/embedding/value Shape: float32[32000,2048] Physical: (None, 'fsdp') I0424 13:42:11.018708 133851429095232 nnx_decoders.py:465] nnx_decoders/carry Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0424 13:42:11.018815 133851429095232 nnx_decoders.py:465] nnx_decoders/carry Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0424 13:42:11.024157 133851429095232 nnx_decoders.py:465] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0424 13:42:11.024214 133851429095232 nnx_decoders.py:465] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0424 13:42:11.040802 133851429095232 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn'). I0424 13:42:11.040865 133851429095232 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0424 13:42:11.056856 133851429095232 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn'). I0424 13:42:11.056918 133851429095232 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0424 13:42:11.116523 133851429095232 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim'). I0424 13:42:11.116612 133851429095232 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 13:42:11.132731 133851429095232 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim'). I0424 13:42:11.132794 133851429095232 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 13:42:11.148703 133851429095232 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim'). I0424 13:42:11.148766 133851429095232 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 13:42:11.186217 133851429095232 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch_attn', 'activation_length_attn', 'activation_heads', 'activation_kv'). I0424 13:42:11.186333 133851429095232 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 13:42:11.246810 133851429095232 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0424 13:42:11.246894 133851429095232 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0424 13:42:25.819409 133851429095232 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. I0424 13:42:25.823266 133851429095232 metric_logger.py:301] number parameters: 1.104 billion I0424 13:42:39.560036 133851429095232 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0424 13:42:39.722791 133851429095232 checkpointing.py:798] Waited 0.16274023056030273 seconds for step 0 to finish before starting checkpointing. I0424 13:42:39.725243 133851429095232 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0424 13:42:39.727243 133851429095232 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 0 I0424 13:42:39.728586 133851429095232 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/nnx_xpk_feat_nnx_post_train_fixes_20260424_120657_05_fp8/checkpoints/0. I0424 13:42:40.525894 133851429095232 signaling_client.py:364] Using JaxDistributedSignalingClient I0424 13:42:40.526904 133851429095232 jax_array_handlers.py:360] Scheduling D2H of 153 prioritized jax.Array. I0424 13:42:40.526968 133851429095232 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 I0424 13:42:40.943467 133851429095232 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.419216s I0424 13:42:40.943641 133851429095232 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 3.534 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.4365580081939697 s) (per-host) I0424 13:42:40.943696 133851429095232 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.436623s (batch_requests_ready=0.006078s, total_serialization_initiated=0.430471s, others=0.000073s) I0424 13:42:40.943816 133851429095232 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.440775s (all_items=0.000018s, per_item={'items': '0.00001836'}, temp_paths=0.440757) I0424 13:42:40.944627 133851429095232 event_tracking.py:125] [process=6] [async] Finished blocking save in 1.22 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/nnx_xpk_feat_nnx_post_train_fixes_20260424_120657_05_fp8/checkpoints/0. I0424 13:42:40.944939 133721704994560 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-24 14:02:40.944901 I0424 13:42:40.947540 133851429095232 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0424 13:42:40.947840 133721175009024 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0424 13:42:40.947998 133851429095232 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/nnx_xpk_feat_nnx_post_train_fixes_20260424_120657_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777038159.7252235, 'wait_for_prev_duration_secs': 6.222724914550781e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777038159.7272806, 'checkpointer_blocking_duration_secs': 1.2178082466125488, 'get_old_steps_start_time': 1777038160.9451306, 'get_old_steps_duration_secs': 2.8371810913085938e-05, 'checkpoint_manager_blocking_start_time': 1777038159.7232914, 'checkpoint_manager_blocking_duration_secs': 1.2246670722961426} I0424 13:42:40.948121 133851429095232 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0424 13:42:40.948201 133851429095232 max_utils.py:750] Memstats: After params initialized: I0424 13:42:40.948251 133851429095232 max_utils.py:756] Using (GB) 0.45 / 31.25 (1.440000%) on TPU_24(process=6,(0,6,0,0)) I0424 13:42:40.948284 133851429095232 max_utils.py:756] Using (GB) 0.45 / 31.25 (1.440000%) on TPU_25(process=6,(1,6,0,0)) I0424 13:42:40.948311 133851429095232 max_utils.py:756] Using (GB) 0.45 / 31.25 (1.440000%) on TPU_28(process=6,(0,7,0,0)) I0424 13:42:40.948335 133851429095232 max_utils.py:756] Using (GB) 0.45 / 31.25 (1.440000%) on TPU_29(process=6,(1,7,0,0)) I0424 13:42:41.270878 133851429095232 metric_logger.py:196] completed step: 0, seconds: 13.735, TFLOP/s/device: 0.989, Tokens/s/device: 149.112, total_weights: 65536, loss: 10.872, lm_loss: 10.872, perplexity: 52680.742 I0424 13:42:41.446068 133851429095232 metric_logger.py:196] completed step: 1, seconds: 1.708, TFLOP/s/device: 7.955, Tokens/s/device: 1199.025, total_weights: 65536, loss: 10.872, lm_loss: 10.872, perplexity: 52680.742 I0424 13:42:41.896924 133851429095232 metric_logger.py:196] completed step: 2, seconds: 0.022, TFLOP/s/device: 611.620, Tokens/s/device: 92189.962, total_weights: 65536, loss: 10.856, lm_loss: 10.856, perplexity: 51864.762 I0424 13:42:42.054240 133851429095232 metric_logger.py:196] completed step: 3, seconds: 0.428, TFLOP/s/device: 31.733, Tokens/s/device: 4783.147, total_weights: 65536, loss: 10.824, lm_loss: 10.824, perplexity: 50225.512 I0424 13:42:42.369265 133851429095232 metric_logger.py:196] completed step: 4, seconds: 0.186, TFLOP/s/device: 72.970, Tokens/s/device: 10998.867, total_weights: 65536, loss: 10.793, lm_loss: 10.793, perplexity: 48689.156 I0424 13:42:42.379404 133851429095232 metric_logger.py:196] completed step: 5, seconds: 0.157, TFLOP/s/device: 86.509, Tokens/s/device: 13039.603, total_weights: 65536, loss: 10.763, lm_loss: 10.763, perplexity: 47229.012 I0424 13:42:43.823935 2895 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0424 13:42:45.865396 133721183401728 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 153 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/nnx_xpk_feat_nnx_post_train_fixes_20260424_120657_05_fp8/checkpoints/0/items/array_metadatas/process_6 I0424 13:43:00.020549 133721704994560 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 80.958 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 19.513410329818726 s) (per-host) I0424 13:43:00.020675 133721704994560 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 19.075626s. I0424 13:43:06.993680 133851429095232 metric_logger.py:196] completed step: 6, seconds: 0.316, TFLOP/s/device: 42.970, Tokens/s/device: 6476.913, total_weights: 65536, loss: 10.733, lm_loss: 10.733, perplexity: 45864.258 I0424 13:43:07.150368 133851429095232 metric_logger.py:196] completed step: 7, seconds: 24.460, TFLOP/s/device: 0.555, Tokens/s/device: 83.729, total_weights: 65536, loss: 10.706, lm_loss: 10.706, perplexity: 44620.242 I0424 13:43:07.450544 133851429095232 metric_logger.py:196] completed step: 8, seconds: 0.164, TFLOP/s/device: 83.007, Tokens/s/device: 12511.684, total_weights: 65536, loss: 10.680, lm_loss: 10.680, perplexity: 43477.055 I0424 13:43:07.458784 133851429095232 checkpointing.py:794] Waiting for step 10 to finish before checkpoint... I0424 13:43:07.764784 133851429095232 checkpointing.py:798] Waited 0.3059723377227783 seconds for step 10 to finish before starting checkpointing. I0424 13:43:07.767199 133851429095232 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0424 13:43:10.137982 133721704994560 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 29.192916s. I0424 13:43:10.138278 133721175009024 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0424 13:43:10.138406 133721175009024 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0424 13:43:10.138461 133721175009024 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0424 13:43:10.141166 133721175009024 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0424 13:43:10.141364 133851429095232 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. W0424 13:43:10.141503 133851429095232 checkpoint_manager.py:1452] Waiting for previous save to complete took 2.374303 seconds. If this number is high, consider checkpointing less frequently. I0424 13:43:10.143600 133851429095232 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 10 I0424 13:43:10.145653 133851429095232 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/nnx_xpk_feat_nnx_post_train_fixes_20260424_120657_05_fp8/checkpoints/10. I0424 13:43:10.482494 133851429095232 jax_array_handlers.py:360] Scheduling D2H of 153 prioritized jax.Array. I0424 13:43:10.482603 133851429095232 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 I0424 13:43:10.522637 133851429095232 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.042623s I0424 13:43:10.522829 133851429095232 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 26.744 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.057685136795043945 s) (per-host) I0424 13:43:10.522883 133851429095232 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.057749s (batch_requests_ready=0.005597s, total_serialization_initiated=0.052080s, others=0.000072s) I0424 13:43:10.523019 133851429095232 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.062058s (all_items=0.000015s, per_item={'items': '0.00001526'}, temp_paths=0.062043) I0424 13:43:10.523699 133851429095232 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.38 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/nnx_xpk_feat_nnx_post_train_fixes_20260424_120657_05_fp8/checkpoints/10. I0424 13:43:10.524059 133721175009024 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-24 14:03:10.524022 I0424 13:43:10.531982 133851429095232 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=10] Starting CheckpointManager Save Finalize thread=save_finalize I0424 13:43:10.532244 133718505158400 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0424 13:43:10.532377 133851429095232 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/nnx_xpk_feat_nnx_post_train_fixes_20260424_120657_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777038187.767169, 'wait_for_prev_duration_secs': 2.374302625656128, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777038190.1436393, 'checkpointer_blocking_duration_secs': 0.38057565689086914, 'get_old_steps_start_time': 1777038190.5242407, 'get_old_steps_duration_secs': 2.9325485229492188e-05, 'checkpoint_manager_blocking_start_time': 1777038187.7652488, 'checkpoint_manager_blocking_duration_secs': 2.767092704772949} I0424 13:43:10.532496 133851429095232 checkpointing.py:409] Started an asynchronous checkpoint save for step 10 I0424 13:43:10.533175 133851429095232 metric_logger.py:196] completed step: 9, seconds: 0.295, TFLOP/s/device: 46.136, Tokens/s/device: 6954.112, total_weights: 65536, loss: 10.656, lm_loss: 10.656, perplexity: 42467.320 I0424 13:43:10.545180 133851429095232 metric_logger.py:196] completed step: 10, seconds: 0.162, TFLOP/s/device: 83.651, Tokens/s/device: 12608.819, total_weights: 65536, loss: 10.636, lm_loss: 10.636, perplexity: 41601.941 I0424 13:43:10.697377 133851429095232 metric_logger.py:196] completed step: 11, seconds: 3.083, TFLOP/s/device: 4.407, Tokens/s/device: 664.223, total_weights: 65536, loss: 10.618, lm_loss: 10.618, perplexity: 40849.570 I0424 13:43:11.287143 133851429095232 metric_logger.py:196] completed step: 12, seconds: 0.010, TFLOP/s/device: 1305.827, Tokens/s/device: 196828.448, total_weights: 65536, loss: 10.602, lm_loss: 10.602, perplexity: 40203.926 I0424 13:43:11.444395 133851429095232 metric_logger.py:196] completed step: 13, seconds: 0.580, TFLOP/s/device: 23.421, Tokens/s/device: 3530.249, total_weights: 65536, loss: 10.588, lm_loss: 10.588, perplexity: 39652.145 I0424 13:43:11.600970 133851429095232 metric_logger.py:196] completed step: 14, seconds: 0.163, TFLOP/s/device: 83.394, Tokens/s/device: 12570.047, total_weights: 65536, loss: 10.577, lm_loss: 10.577, perplexity: 39212.879 I0424 13:43:11.757804 133851429095232 metric_logger.py:196] completed step: 15, seconds: 0.157, TFLOP/s/device: 86.462, Tokens/s/device: 13032.550, total_weights: 65536, loss: 10.568, lm_loss: 10.568, perplexity: 38879.223 I0424 13:43:11.914503 133851429095232 metric_logger.py:196] completed step: 16, seconds: 0.157, TFLOP/s/device: 86.774, Tokens/s/device: 13079.492, total_weights: 65536, loss: 10.562, lm_loss: 10.562, perplexity: 38619.105 I0424 13:43:12.071354 133851429095232 metric_logger.py:196] completed step: 17, seconds: 0.157, TFLOP/s/device: 86.635, Tokens/s/device: 13058.643, total_weights: 65536, loss: 10.556, lm_loss: 10.556, perplexity: 38395.816 I0424 13:43:12.228075 133851429095232 metric_logger.py:196] completed step: 18, seconds: 0.157, TFLOP/s/device: 86.585, Tokens/s/device: 13051.070, total_weights: 65536, loss: 10.552, lm_loss: 10.552, perplexity: 38236.652 I0424 13:43:12.386877 133851429095232 checkpointing.py:794] Waiting for step 19 to finish before checkpoint... I0424 13:43:12.388145 133851429095232 checkpointing.py:798] Waited 0.0012798309326171875 seconds for step 19 to finish before starting checkpointing. I0424 13:43:12.390081 133851429095232 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=10][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0424 13:43:16.253904 133720610678528 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 153 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/nnx_xpk_feat_nnx_post_train_fixes_20260424_120657_05_fp8/checkpoints/10/items/array_metadatas/process_6 I0424 13:43:31.610904 133721175009024 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 74.708 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 21.14572310447693 s) (per-host) I0424 13:43:31.611028 133721175009024 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 21.086842s. I0424 13:43:39.442937 133721175009024 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 28.918734s. I0424 13:43:39.443259 133718505158400 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0424 13:43:39.443395 133718505158400 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0424 13:43:39.443443 133718505158400 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=10] CheckpointManager Save Finalize is syncing with other hosts... I0424 13:43:39.445125 133718505158400 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=10] CheckpointManager Save Finalize is done on all hosts. I0424 13:43:39.445297 133851429095232 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=10][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=10. W0424 13:43:39.445448 133851429095232 checkpoint_manager.py:1452] Waiting for previous save to complete took 27.055374 seconds. If this number is high, consider checkpointing less frequently. I0424 13:43:39.447206 133851429095232 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 19 I0424 13:43:39.449234 133851429095232 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/nnx_xpk_feat_nnx_post_train_fixes_20260424_120657_05_fp8/checkpoints/19. I0424 13:43:40.209755 133851429095232 jax_array_handlers.py:360] Scheduling D2H of 153 prioritized jax.Array. I0424 13:43:40.209867 133851429095232 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 I0424 13:43:40.245843 133851429095232 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.038914s I0424 13:43:40.246006 133851429095232 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 3.007 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.5131120681762695 s) (per-host) I0424 13:43:40.246056 133851429095232 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.513172s (batch_requests_ready=0.465086s, total_serialization_initiated=0.048022s, others=0.000065s) I0424 13:43:40.246194 133851429095232 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.517309s (all_items=0.000011s, per_item={'items': '0.00001121'}, temp_paths=0.517298) I0424 13:43:40.246937 133851429095232 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.80 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/nnx_xpk_feat_nnx_post_train_fixes_20260424_120657_05_fp8/checkpoints/19. I0424 13:43:40.247248 133718505158400 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-24 14:03:40.247214 I0424 13:43:40.249263 133851429095232 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=19] Starting CheckpointManager Save Finalize thread=save_finalize I0424 13:43:40.249500 133719562114816 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0424 13:43:40.249623 133851429095232 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/nnx_xpk_feat_nnx_post_train_fixes_20260424_120657_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777038192.3900504, 'wait_for_prev_duration_secs': 27.055373668670654, 'time_between_consecutive_saves_sec': 2.248844861984253, 'checkpointer_blocking_start_time': 1777038219.4472454, 'checkpointer_blocking_duration_secs': 0.8001492023468018, 'get_old_steps_start_time': 1777038220.247413, 'get_old_steps_duration_secs': 2.574920654296875e-05, 'checkpoint_manager_blocking_start_time': 1777038192.3884616, 'checkpoint_manager_blocking_duration_secs': 27.861127614974976} I0424 13:43:40.249740 133851429095232 checkpointing.py:409] Started an asynchronous checkpoint save for step 19 I0424 13:43:40.249781 133851429095232 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=19][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0424 13:43:45.416998 133721175009024 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 153 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/nnx_xpk_feat_nnx_post_train_fixes_20260424_120657_05_fp8/checkpoints/19/items/array_metadatas/process_6 I0424 13:44:00.564575 133718505158400 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 75.835 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 20.831641912460327 s) (per-host) I0424 13:44:00.564702 133718505158400 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 20.317341s. I0424 13:44:07.735205 133718505158400 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 27.487827s. I0424 13:44:07.735510 133719562114816 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0424 13:44:07.735629 133719562114816 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0424 13:44:07.735671 133719562114816 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=19] CheckpointManager Save Finalize is syncing with other hosts... I0424 13:44:07.737153 133719562114816 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=19] CheckpointManager Save Finalize is done on all hosts. I0424 13:44:07.737321 133851429095232 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=19][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=19. I0424 13:44:07.737499 133851429095232 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0424 13:44:07.738434 133851429095232 metric_logger.py:196] completed step: 19, seconds: 0.157, TFLOP/s/device: 86.725, Tokens/s/device: 13072.146, total_weights: 65536, loss: 10.549, lm_loss: 10.549, perplexity: 38125.074 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Fri Apr 24 13:44:20 UTC 2026 EXIT_CODE=0