XPK Start: Sat Apr 25 14:05:58 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. 2026-04-25 14:06:23.038437: 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) I0425 14:06:23.252289 137746502977344 max_utils.py:273] Attempting to initialize the jax distributed system... I0425 14:06:32.292975 137746502977344 distributed.py:149] Starting JAX distributed service on [::]:8482 I0425 14:06:32.295485 137746502977344 distributed.py:172] Connecting to JAX distributed service on mt-09-pdb-lt-1-zr6e0-slice-job-0-0.mt-09-pdb-lt-1-zr6e0:8482 I0425 14:06:33.552525 137746502977344 max_utils.py:284] Jax distributed system initialized! I0425 14:06:39.820257 137746502977344 max_utils.py:800] System Information: Jax Version: 0.9.2 I0425 14:06:39.820362 137746502977344 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0425 14:06:39.820402 137746502977344 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 I0425 14:06:39.820438 137746502977344 train_utils.py:391] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0425 14:06:40.521050 137746502977344 maxtext_utils.py:1771] Num_devices: 32, shape (1, 1, 1, 8, 1, 1, 1, 1, 4, 1, 1, 1, 1) I0425 14:06:40.636401 137746502977344 checkpointing.py:688] Setting up checkpoint logger... I0425 14:06:40.636521 137746502977344 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0425 14:06:40.636566 137746502977344 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0425 14:06:40.636763 137746502977344 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 0x7d470517a5d0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0425 14:06:43.534709 137746502977344 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0425 14:06:43.534952 137746502977344 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 0x7d329c1669c0>}, handler_registry=None I0425 14:06:43.535200 137746502977344 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7d329c1669c0>` 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`. I0425 14:06:43.535252 137746502977344 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d329c5dcc80>` 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`. I0425 14:06:43.535287 137746502977344 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 0x7d329c1669c0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7d329c1669c0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d329c5dcc80>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d329c5dcc80>}). I0425 14:06:43.535608 137746502977344 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0425 14:06:43.535691 137746502977344 async_checkpointer.py:192] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7d329c15f600> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0425 14:06:44.666491 137746502977344 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260425_121355/nnx_xpk_feat_nnx_post_train_fixes_20260425_121355_09_pdb_lt_1/checkpoints I0425 14:06:44.776912 137746502977344 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_20260425_121355/nnx_xpk_feat_nnx_post_train_fixes_20260425_121355_09_pdb_lt_1/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7d329c1a91c0> I0425 14:06:44.777089 137746502977344 checkpointing.py:302] Checkpoint manager created! I0425 14:06:45.743817 137746502977344 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0425 14:06:45.743938 137746502977344 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 8 tensor: 4 I0425 14:06:47.129440 137746502977344 maxtext_utils.py:1889] decoder/decoder_norm/scale/value Shape: float32[2048] Physical: ('tensor',) I0425 14:06:47.129557 137746502977344 maxtext_utils.py:1889] decoder/layers/mlp/wi_0/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, 'tensor') I0425 14:06:47.129609 137746502977344 maxtext_utils.py:1889] decoder/layers/mlp/wi_1/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, 'tensor') I0425 14:06:47.129652 137746502977344 maxtext_utils.py:1889] decoder/layers/mlp/wo/kernel/value Shape: float32[7168,16,2048] Physical: ('tensor', None, 'fsdp') I0425 14:06:47.129690 137746502977344 maxtext_utils.py:1889] decoder/layers/post_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: ('tensor', None) I0425 14:06:47.129724 137746502977344 maxtext_utils.py:1889] decoder/layers/pre_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: ('tensor', None) I0425 14:06:47.129759 137746502977344 maxtext_utils.py:1889] decoder/layers/self_attention/key/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, 'tensor', None) I0425 14:06:47.129793 137746502977344 maxtext_utils.py:1889] decoder/layers/self_attention/out/kernel/value Shape: float32[16,16,128,2048] Physical: ('tensor', None, None, 'fsdp') I0425 14:06:47.129825 137746502977344 maxtext_utils.py:1889] decoder/layers/self_attention/query/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, 'tensor', None) I0425 14:06:47.129857 137746502977344 maxtext_utils.py:1889] decoder/layers/self_attention/value/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, 'tensor', None) I0425 14:06:47.129888 137746502977344 maxtext_utils.py:1889] decoder/logits_dense/kernel/value Shape: float32[2048,32000] Physical: ('fsdp', 'tensor') I0425 14:06:47.129918 137746502977344 maxtext_utils.py:1889] token_embedder/embedding/value Shape: float32[32000,2048] Physical: ('tensor', 'fsdp') I0425 14:06:47.540701 137746502977344 nnx_decoders.py:465] nnx_decoders/carry Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0425 14:06:47.540805 137746502977344 nnx_decoders.py:465] nnx_decoders/carry Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, 'tensor'). I0425 14:06:47.546125 137746502977344 nnx_decoders.py:465] Unknown Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0425 14:06:47.546182 137746502977344 nnx_decoders.py:465] Unknown Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, 'tensor'). I0425 14:06:47.562731 137746502977344 attentions.py:1088] attentions/inputs_q Logical: bfloat16[8,2048,2048]....................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn'). I0425 14:06:47.562791 137746502977344 attentions.py:1088] attentions/inputs_q Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, 'tensor'). I0425 14:06:47.578544 137746502977344 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[8,2048,2048]....................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn'). I0425 14:06:47.578602 137746502977344 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, 'tensor'). I0425 14:06:47.602719 137746502977344 attentions.py:1154] attentions/query Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim'). I0425 14:06:47.602787 137746502977344 attentions.py:1154] attentions/query Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, 'tensor', None). I0425 14:06:47.618820 137746502977344 attentions.py:1155] attentions/key Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim'). I0425 14:06:47.618885 137746502977344 attentions.py:1155] attentions/key Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, 'tensor', None). I0425 14:06:47.634747 137746502977344 attentions.py:1156] attentions/value Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim'). I0425 14:06:47.634811 137746502977344 attentions.py:1156] attentions/value Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, 'tensor', None). I0425 14:06:47.665499 137746502977344 attentions.py:1198] attentions/out Logical: bfloat16[8,2048,16,128]..................................... ('activation_batch_attn', 'activation_length_attn', 'activation_heads', 'activation_kv'). I0425 14:06:47.665574 137746502977344 attentions.py:1198] attentions/out Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, 'tensor', None). I0425 14:06:47.685655 137746502977344 linears.py:525] linears/x Logical: bfloat16[8,2048,7168]....................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0425 14:06:47.685719 137746502977344 linears.py:525] linears/x Physical: bfloat16[8,2048,7168]....................................... ('fsdp', None, 'tensor'). I0425 14:07:02.997695 137746502977344 max_utils.py:791] Total memory size: 0.9 GB, Output size: 0.4 GB, Temp size: 0.5 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB. I0425 14:07:03.000142 137746502977344 metric_logger.py:301] number parameters: 1.104 billion I0425 14:07:03.952049 137746502977344 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0425 14:07:18.490000 137746502977344 checkpointing.py:798] Waited 14.537934303283691 seconds for step 0 to finish before starting checkpointing. I0425 14:07:18.492489 137746502977344 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0425 14:07:18.494361 137746502977344 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 0 I0425 14:07:18.495948 137746502977344 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260425_121355/nnx_xpk_feat_nnx_post_train_fixes_20260425_121355_09_pdb_lt_1/checkpoints/0. I0425 14:07:18.798773 137746502977344 signaling_client.py:364] Using JaxDistributedSignalingClient I0425 14:07:18.799682 137746502977344 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array. I0425 14:07:18.799741 137746502977344 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 I0425 14:07:19.067476 137746502977344 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.269489s I0425 14:07:19.067655 137746502977344 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 5.529 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2789790630340576 s) (per-host) I0425 14:07:19.067707 137746502977344 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.279042s (batch_requests_ready=0.003473s, total_serialization_initiated=0.275497s, others=0.000071s) I0425 14:07:19.067802 137746502977344 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.283386s (all_items=0.000017s, per_item={'items': '0.00001740'}, temp_paths=0.283369) I0425 14:07:19.068564 137746502977344 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.57 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260425_121355/nnx_xpk_feat_nnx_post_train_fixes_20260425_121355_09_pdb_lt_1/checkpoints/0. I0425 14:07:19.068917 137617429477120 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-25 14:27:19.068874 I0425 14:07:19.083806 137746502977344 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0425 14:07:19.084116 137616926177024 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0425 14:07:19.084274 137746502977344 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260425_121355/nnx_xpk_feat_nnx_post_train_fixes_20260425_121355_09_pdb_lt_1/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777126038.4924703, 'wait_for_prev_duration_secs': 6.031990051269531e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777126038.4943988, 'checkpointer_blocking_duration_secs': 0.5746874809265137, 'get_old_steps_start_time': 1777126039.0691319, 'get_old_steps_duration_secs': 2.765655517578125e-05, 'checkpoint_manager_blocking_start_time': 1777126038.4904401, 'checkpoint_manager_blocking_duration_secs': 0.5937962532043457} I0425 14:07:19.084387 137746502977344 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0425 14:07:19.084457 137746502977344 max_utils.py:750] Memstats: After params initialized: I0425 14:07:19.084511 137746502977344 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0)) I0425 14:07:19.084543 137746502977344 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0)) I0425 14:07:19.084569 137746502977344 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0)) I0425 14:07:19.084592 137746502977344 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0)) I0425 14:07:19.404314 137746502977344 metric_logger.py:196] completed step: 0, seconds: 0.951, TFLOP/s/device: 3.572, Tokens/s/device: 538.468, total_weights: 16384, loss: 10.864, lm_loss: 10.864, perplexity: 52258.910 I0425 14:07:19.488183 137746502977344 metric_logger.py:196] completed step: 1, seconds: 15.450, TFLOP/s/device: 0.220, Tokens/s/device: 33.138, total_weights: 16384, loss: 10.864, lm_loss: 10.864, perplexity: 52258.910 I0425 14:07:19.887122 137746502977344 metric_logger.py:196] completed step: 2, seconds: 0.027, TFLOP/s/device: 126.270, Tokens/s/device: 19032.750, total_weights: 16384, loss: 9.760, lm_loss: 9.760, perplexity: 17319.064 I0425 14:07:19.945658 137746502977344 metric_logger.py:196] completed step: 3, seconds: 0.390, TFLOP/s/device: 8.720, Tokens/s/device: 1314.307, total_weights: 16384, loss: 8.820, lm_loss: 8.820, perplexity: 6771.344 I0425 14:07:20.063379 137746502977344 metric_logger.py:196] completed step: 4, seconds: 0.074, TFLOP/s/device: 45.657, Tokens/s/device: 6881.905, total_weights: 16384, loss: 7.947, lm_loss: 7.947, perplexity: 2825.893 I0425 14:07:20.072004 137746502977344 metric_logger.py:196] completed step: 5, seconds: 0.058, TFLOP/s/device: 58.637, Tokens/s/device: 8838.406, total_weights: 16384, loss: 7.209, lm_loss: 7.209, perplexity: 1352.040 I0425 14:07:22.321893 2560 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0425 14:07:24.324296 137617412691712 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_20260425_121355/nnx_xpk_feat_nnx_post_train_fixes_20260425_121355_09_pdb_lt_1/checkpoints/0/items/array_metadatas/process_6 I0425 14:07:34.105114 137746502977344 metric_logger.py:196] completed step: 6, seconds: 0.120, TFLOP/s/device: 28.391, Tokens/s/device: 4279.326, total_weights: 16384, loss: 6.651, lm_loss: 6.651, perplexity: 773.347 I0425 14:07:34.163507 137746502977344 metric_logger.py:196] completed step: 7, seconds: 13.976, TFLOP/s/device: 0.243, Tokens/s/device: 36.634, total_weights: 16384, loss: 6.267, lm_loss: 6.267, perplexity: 526.951 I0425 14:07:34.222042 137746502977344 metric_logger.py:196] completed step: 8, seconds: 0.064, TFLOP/s/device: 52.871, Tokens/s/device: 7969.368, total_weights: 16384, loss: 6.030, lm_loss: 6.030, perplexity: 415.600 I0425 14:07:34.281355 137746502977344 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0425 14:07:34.282008 137746502977344 checkpointing.py:798] Waited 0.0006618499755859375 seconds for step 9 to finish before starting checkpointing. I0425 14:07:34.284008 137746502977344 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0425 14:07:56.234785 137617429477120 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 42.183 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 37.44607138633728 s) (per-host) I0425 14:07:56.234894 137617429477120 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 37.165855s. I0425 14:08:04.143337 137617429477120 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 45.074281s. I0425 14:08:04.143620 137616926177024 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0425 14:08:04.143740 137616926177024 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0425 14:08:04.143792 137616926177024 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0425 14:08:04.145427 137616926177024 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0425 14:08:04.145585 137746502977344 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. W0425 14:08:04.145671 137746502977344 checkpoint_manager.py:1452] Waiting for previous save to complete took 29.861667 seconds. If this number is high, consider checkpointing less frequently. I0425 14:08:04.147686 137746502977344 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 9 I0425 14:08:04.149777 137746502977344 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260425_121355/nnx_xpk_feat_nnx_post_train_fixes_20260425_121355_09_pdb_lt_1/checkpoints/9. I0425 14:08:04.436305 137746502977344 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array. I0425 14:08:04.436400 137746502977344 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 I0425 14:08:04.463372 137746502977344 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.028664s I0425 14:08:04.463525 137746502977344 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 42.997 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.03587651252746582 s) (per-host) I0425 14:08:04.463579 137746502977344 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.035937s (batch_requests_ready=0.002851s, total_serialization_initiated=0.033012s, others=0.000073s) I0425 14:08:04.463689 137746502977344 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.040417s (all_items=0.000016s, per_item={'items': '0.00001621'}, temp_paths=0.040401) I0425 14:08:04.464460 137746502977344 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.32 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260425_121355/nnx_xpk_feat_nnx_post_train_fixes_20260425_121355_09_pdb_lt_1/checkpoints/9. I0425 14:08:04.464759 137616926177024 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-25 14:28:04.464724 I0425 14:08:04.471588 137746502977344 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0425 14:08:04.471883 137615852435200 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0425 14:08:04.472044 137746502977344 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260425_121355/nnx_xpk_feat_nnx_post_train_fixes_20260425_121355_09_pdb_lt_1/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777126054.283977, 'wait_for_prev_duration_secs': 29.861666917800903, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777126084.1477246, 'checkpointer_blocking_duration_secs': 0.31717658042907715, 'get_old_steps_start_time': 1777126084.4649253, 'get_old_steps_duration_secs': 3.170967102050781e-05, 'checkpoint_manager_blocking_start_time': 1777126054.2822483, 'checkpoint_manager_blocking_duration_secs': 30.18976068496704} I0425 14:08:04.472169 137746502977344 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0425 14:08:04.472213 137746502977344 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0425 14:08:09.521750 137611012204288 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_20260425_121355/nnx_xpk_feat_nnx_post_train_fixes_20260425_121355_09_pdb_lt_1/checkpoints/9/items/array_metadatas/process_6 I0425 14:08:45.371819 137616926177024 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 38.579 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 40.94412899017334 s) (per-host) I0425 14:08:45.371946 137616926177024 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 40.907079s. I0425 14:08:52.401205 137616926177024 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 47.936323s. I0425 14:08:52.401431 137615852435200 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0425 14:08:52.401498 137615852435200 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0425 14:08:52.401545 137615852435200 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0425 14:08:52.406047 137615852435200 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0425 14:08:52.406227 137746502977344 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. I0425 14:08:52.406432 137746502977344 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0425 14:08:52.407459 137746502977344 metric_logger.py:196] completed step: 9, seconds: 0.059, TFLOP/s/device: 58.015, Tokens/s/device: 8744.663, total_weights: 16384, loss: 5.890, lm_loss: 5.890, perplexity: 361.390 Per train step: Total TFLOPs: 3.40 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Sat Apr 25 14:09:03 UTC 2026 EXIT_CODE=0