XPK Start: Thu Apr 23 14:49:38 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 14:50:03.751923: 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 14:50:03.964279 137520406697792 max_utils.py:273] Attempting to initialize the jax distributed system... I0423 14:50:13.003942 137520406697792 distributed.py:149] Starting JAX distributed service on [::]:8482 I0423 14:50:13.006296 137520406697792 distributed.py:172] Connecting to JAX distributed service on mt-10-shardy-true-h5gl1-slice-job-0-0.mt-10-shardy-true-h5gl1:8482 I0423 14:50:14.120622 137520406697792 max_utils.py:284] Jax distributed system initialized! I0423 14:50:19.129576 137520406697792 max_utils.py:800] System Information: Jax Version: 0.9.2 I0423 14:50:19.129698 137520406697792 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0423 14:50:19.129741 137520406697792 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 14:50:19.129777 137520406697792 train_utils.py:391] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0423 14:50:19.827482 137520406697792 maxtext_utils.py:1771] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0423 14:50:19.941431 137520406697792 checkpointing.py:688] Setting up checkpoint logger... I0423 14:50:19.941551 137520406697792 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0423 14:50:19.941596 137520406697792 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0423 14:50:19.941810 137520406697792 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 0x7d126071c110>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0423 14:50:23.029752 137520406697792 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0423 14:50:23.029989 137520406697792 checkpoint_manager.py:708] [process=5][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7cfed055da30>}, handler_registry=None I0423 14:50:23.030224 137520406697792 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7cfed055da30>` 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 14:50:23.030272 137520406697792 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7cfed0553140>` 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 14:50:23.030308 137520406697792 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 0x7cfed055da30>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7cfed055da30>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7cfed0553140>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7cfed0553140>}). I0423 14:50:23.030635 137520406697792 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0423 14:50:23.030719 137520406697792 async_checkpointer.py:192] [process=5][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7cfed05436a0> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0423 14:50:24.069257 137520406697792 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_10_shardy_true/checkpoints I0423 14:50:24.071752 137520406697792 checkpoint_manager.py:929] [process=5][thread=MainThread] CheckpointManager created, primary_host=0, CheckpointManagerOptions=CheckpointManagerOptions(save_interval_steps=1, max_to_keep=None, keep_time_interval=None, keep_period=None, should_keep_fn=None, best_fn=None, best_mode='max', keep_checkpoints_without_metrics=True, step_prefix=None, step_format_fixed_length=None, step_name_format=None, create=True, cleanup_tmp_directories=False, save_on_steps=frozenset(), single_host_load_and_broadcast=False, todelete_subdir=None, todelete_full_path=None, enable_background_delete=False, read_only=False, enable_async_checkpointing=True, async_options=None, multiprocessing_options=MultiprocessingOptions(primary_host=0, active_processes=None, barrier_sync_key_prefix=None), should_save_fn=None, file_options=FileOptions(path_permission_mode=None), save_root_metadata=True, temporary_path_class=None, save_decision_policy=FixedIntervalPolicy(interval=10), preservation_policy=LatestN(n=None), prevent_write_metrics=False, enable_should_save_is_saving_in_progress_check=True, enable_per_process_directory_creation=False, lightweight_initialize=False), root_directory=gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_10_shardy_true/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7cfed05682c0> I0423 14:50:24.071863 137520406697792 checkpointing.py:302] Checkpoint manager created! I0423 14:50:25.058340 137520406697792 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0423 14:50:25.058457 137520406697792 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0423 14:50:26.448767 137520406697792 maxtext_utils.py:1889] decoder/decoder_norm/scale/value Shape: float32[2048] Physical: (None,) I0423 14:50:26.448885 137520406697792 maxtext_utils.py:1889] decoder/layers/mlp/wi_0/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0423 14:50:26.448941 137520406697792 maxtext_utils.py:1889] decoder/layers/mlp/wi_1/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0423 14:50:26.448990 137520406697792 maxtext_utils.py:1889] decoder/layers/mlp/wo/kernel/value Shape: float32[7168,16,2048] Physical: (None, None, 'fsdp') I0423 14:50:26.449028 137520406697792 maxtext_utils.py:1889] decoder/layers/post_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0423 14:50:26.449064 137520406697792 maxtext_utils.py:1889] decoder/layers/pre_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0423 14:50:26.449104 137520406697792 maxtext_utils.py:1889] decoder/layers/self_attention/key/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0423 14:50:26.449141 137520406697792 maxtext_utils.py:1889] decoder/layers/self_attention/out/kernel/value Shape: float32[16,16,128,2048] Physical: (None, None, None, 'fsdp') I0423 14:50:26.449177 137520406697792 maxtext_utils.py:1889] decoder/layers/self_attention/query/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0423 14:50:26.449211 137520406697792 maxtext_utils.py:1889] decoder/layers/self_attention/value/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0423 14:50:26.449244 137520406697792 maxtext_utils.py:1889] decoder/logits_dense/kernel/value Shape: float32[2048,32000] Physical: ('fsdp', None) I0423 14:50:26.449276 137520406697792 maxtext_utils.py:1889] token_embedder/embedding/value Shape: float32[32000,2048] Physical: (None, 'fsdp') I0423 14:50:26.853123 137520406697792 nnx_decoders.py:465] nnx_decoders/carry Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0423 14:50:26.853225 137520406697792 nnx_decoders.py:465] nnx_decoders/carry Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 14:50:26.858435 137520406697792 nnx_decoders.py:465] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0423 14:50:26.858494 137520406697792 nnx_decoders.py:465] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 14:50:26.875396 137520406697792 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 14:50:26.875462 137520406697792 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 14:50:26.891414 137520406697792 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 14:50:26.891485 137520406697792 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 14:50:26.917454 137520406697792 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 14:50:26.917521 137520406697792 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 14:50:26.933455 137520406697792 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 14:50:26.933520 137520406697792 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 14:50:26.949393 137520406697792 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 14:50:26.949453 137520406697792 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 14:50:26.978966 137520406697792 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0423 14:50:26.979038 137520406697792 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 14:50:26.998925 137520406697792 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0423 14:50:26.998991 137520406697792 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0423 14:50:37.969104 137520406697792 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 14:50:37.971450 137520406697792 metric_logger.py:301] number parameters: 1.104 billion I0423 14:50:49.292896 137520406697792 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0423 14:50:49.448000 137520406697792 checkpointing.py:798] Waited 0.1550886631011963 seconds for step 0 to finish before starting checkpointing. I0423 14:50:49.450259 137520406697792 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 14:50:49.452156 137520406697792 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 0 I0423 14:50:49.453552 137520406697792 event_tracking.py:70] [process=5] [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_10_shardy_true/checkpoints/0. I0423 14:50:50.177116 137520406697792 signaling_client.py:364] Using JaxDistributedSignalingClient I0423 14:50:50.178033 137520406697792 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array. I0423 14:50:50.178088 137520406697792 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 14:50:50.450407 137520406697792 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.274083s I0423 14:50:50.450581 137520406697792 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 5.441 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28348827362060547 s) (per-host) I0423 14:50:50.450634 137520406697792 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.283553s (batch_requests_ready=0.003265s, total_serialization_initiated=0.280215s, others=0.000072s) I0423 14:50:50.450749 137520406697792 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.287767s (all_items=0.000018s, per_item={'items': '0.00001812'}, temp_paths=0.287749) I0423 14:50:50.451514 137520406697792 event_tracking.py:125] [process=5] [async] Finished blocking save in 1.00 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_10_shardy_true/checkpoints/0. I0423 14:50:50.451858 137390662473472 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 15:10:50.451818 I0423 14:50:50.458059 137520406697792 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0423 14:50:50.458336 137394579232512 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0423 14:50:50.458488 137520406697792 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_10_shardy_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776955849.450241, 'wait_for_prev_duration_secs': 6.651878356933594e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776955849.452198, 'checkpointer_blocking_duration_secs': 0.9997665882110596, 'get_old_steps_start_time': 1776955850.4519885, 'get_old_steps_duration_secs': 2.8371810913085938e-05, 'checkpoint_manager_blocking_start_time': 1776955849.4483984, 'checkpoint_manager_blocking_duration_secs': 1.0100507736206055} I0423 14:50:50.458591 137520406697792 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0423 14:50:50.458673 137520406697792 max_utils.py:750] Memstats: After params initialized: I0423 14:50:50.458723 137520406697792 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_18(process=5,(2,4,0,0)) I0423 14:50:50.458756 137520406697792 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_19(process=5,(3,4,0,0)) I0423 14:50:50.458782 137520406697792 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_22(process=5,(2,5,0,0)) I0423 14:50:50.458806 137520406697792 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_23(process=5,(3,5,0,0)) I0423 14:50:50.774101 137520406697792 metric_logger.py:196] completed step: 0, seconds: 11.320, TFLOP/s/device: 1.200, Tokens/s/device: 180.913, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52786.469 I0423 14:50:50.944749 137520406697792 metric_logger.py:196] completed step: 1, seconds: 1.479, TFLOP/s/device: 9.184, Tokens/s/device: 1384.373, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52786.469 I0423 14:50:51.378594 137520406697792 metric_logger.py:196] completed step: 2, seconds: 0.024, TFLOP/s/device: 560.965, Tokens/s/device: 84554.725, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28632.133 I0423 14:50:51.526021 137520406697792 metric_logger.py:196] completed step: 3, seconds: 0.423, TFLOP/s/device: 32.094, Tokens/s/device: 4837.628, total_weights: 65536, loss: 9.732, lm_loss: 9.732, perplexity: 16855.789 I0423 14:50:51.822004 137520406697792 metric_logger.py:196] completed step: 4, seconds: 0.165, TFLOP/s/device: 82.498, Tokens/s/device: 12434.956, total_weights: 65536, loss: 9.274, lm_loss: 9.274, perplexity: 10661.594 I0423 14:50:51.829259 137520406697792 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.365, Tokens/s/device: 13922.312, total_weights: 65536, loss: 8.888, lm_loss: 8.888, perplexity: 7245.978 I0423 14:50:54.175343 2789 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0423 14:50:56.493107 137390702196480 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_10_shardy_true/checkpoints/0/items/array_metadatas/process_5 I0423 14:51:14.091772 137520406697792 metric_logger.py:196] completed step: 6, seconds: 0.297, TFLOP/s/device: 45.815, Tokens/s/device: 6905.784, total_weights: 65536, loss: 8.589, lm_loss: 8.589, perplexity: 5371.156 I0423 14:51:14.239211 137520406697792 metric_logger.py:196] completed step: 7, seconds: 22.116, TFLOP/s/device: 0.614, Tokens/s/device: 92.602, total_weights: 65536, loss: 8.380, lm_loss: 8.380, perplexity: 4360.465 I0423 14:51:14.386708 137520406697792 metric_logger.py:196] completed step: 8, seconds: 0.153, TFLOP/s/device: 88.650, Tokens/s/device: 13362.302, total_weights: 65536, loss: 8.251, lm_loss: 8.251, perplexity: 3831.256 I0423 14:51:14.534885 137520406697792 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0423 14:51:14.535561 137520406697792 checkpointing.py:798] Waited 0.0006871223449707031 seconds for step 9 to finish before starting checkpointing. I0423 14:51:14.537569 137520406697792 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 14:51:28.399535 137390662473472 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 41.316 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 38.23240828514099 s) (per-host) I0423 14:51:28.399675 137390662473472 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 37.947178s. I0423 14:51:36.987751 137390662473472 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 46.535254s. I0423 14:51:36.988029 137394579232512 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 14:51:36.988144 137394579232512 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0423 14:51:36.988193 137394579232512 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0423 14:51:36.989961 137394579232512 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0423 14:51:36.990147 137520406697792 checkpoint_manager.py:2032] [process=5][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0. W0423 14:51:36.990283 137520406697792 checkpoint_manager.py:1452] Waiting for previous save to complete took 22.452715 seconds. If this number is high, consider checkpointing less frequently. I0423 14:51:36.992051 137520406697792 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 9 I0423 14:51:36.994091 137520406697792 event_tracking.py:70] [process=5] [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_10_shardy_true/checkpoints/9. I0423 14:51:37.746844 137520406697792 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array. I0423 14:51:37.746934 137520406697792 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 14:51:37.784698 137520406697792 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.039486s I0423 14:51:37.784864 137520406697792 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 32.897 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.0468907356262207 s) (per-host) I0423 14:51:37.784914 137520406697792 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.046950s (batch_requests_ready=0.002979s, total_serialization_initiated=0.043904s, others=0.000068s) I0423 14:51:37.785016 137520406697792 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.051040s (all_items=0.000014s, per_item={'items': '0.00001383'}, temp_paths=0.051027) I0423 14:51:37.785670 137520406697792 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.79 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_10_shardy_true/checkpoints/9. I0423 14:51:37.786010 137371727107840 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 15:11:37.785974 I0423 14:51:37.787960 137520406697792 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0423 14:51:37.788240 137394579232512 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0423 14:51:37.788372 137520406697792 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_10_shardy_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776955874.5375388, 'wait_for_prev_duration_secs': 22.452715158462524, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776955896.9920907, 'checkpointer_blocking_duration_secs': 0.7940676212310791, 'get_old_steps_start_time': 1776955897.786182, 'get_old_steps_duration_secs': 2.8371810913085938e-05, 'checkpoint_manager_blocking_start_time': 1776955874.5357978, 'checkpoint_manager_blocking_duration_secs': 23.252540588378906} I0423 14:51:37.788542 137520406697792 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0423 14:51:37.788587 137520406697792 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 14:51:44.032321 137390702196480 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_10_shardy_true/checkpoints/9/items/array_metadatas/process_5 I0423 14:52:19.771496 137371727107840 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 37.579 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.033485651016235 s) (per-host) I0423 14:52:19.771622 137371727107840 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.985497s. I0423 14:52:30.136938 137371727107840 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 52.350799s. I0423 14:52:30.137228 137394579232512 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 14:52:30.137352 137394579232512 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0423 14:52:30.137400 137394579232512 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0423 14:52:30.138945 137394579232512 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0423 14:52:30.139117 137520406697792 checkpoint_manager.py:2032] [process=5][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9. I0423 14:52:30.139299 137520406697792 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 14:52:30.140307 137520406697792 metric_logger.py:196] completed step: 9, seconds: 0.148, TFLOP/s/device: 91.926, Tokens/s/device: 13856.094, 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 14:52:38 UTC 2026 EXIT_CODE=0