XPK Start: Sat Apr 25 14:44:42 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 14:45:07.839440: 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 14:45:08.054324 138233766950720 max_utils.py:273] Attempting to initialize the jax distributed system... I0425 14:45:17.094967 138233766950720 distributed.py:149] Starting JAX distributed service on [::]:8482 I0425 14:45:17.097322 138233766950720 distributed.py:172] Connecting to JAX distributed service on mt-16-zarr3-true-sv-v6r6t-slice-job-0-0.mt-16-zarr3-true-sv-v6r6t:8482 I0425 14:45:17.826117 138233766950720 max_utils.py:284] Jax distributed system initialized! I0425 14:45:23.834420 138233766950720 max_utils.py:800] System Information: Jax Version: 0.9.2 I0425 14:45:23.834527 138233766950720 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0425 14:45:23.834568 138233766950720 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 14:45:23.834604 138233766950720 train_utils.py:391] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0425 14:45:24.535379 138233766950720 maxtext_utils.py:1771] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0425 14:45:24.651230 138233766950720 checkpointing.py:688] Setting up checkpoint logger... I0425 14:45:24.651355 138233766950720 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0425 14:45:24.651402 138233766950720 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0425 14:45:24.651601 138233766950720 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 0x7db857138890>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0425 14:45:27.527968 138233766950720 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0425 14:45:27.528224 138233766950720 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 0x7da45833cad0>}, handler_registry=None I0425 14:45:27.528473 138233766950720 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7da45833cad0>` 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 14:45:27.528522 138233766950720 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7da41858be00>` 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 14:45:27.528559 138233766950720 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 0x7da45833cad0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7da45833cad0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7da41858be00>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7da41858be00>}). I0425 14:45:27.528885 138233766950720 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0425 14:45:27.528955 138233766950720 async_checkpointer.py:192] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7da4185d7560> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0425 14:45:28.645227 138233766950720 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_16_zarr3_true/checkpoints I0425 14:45:29.091263 138233766950720 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=5), 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_16_zarr3_true/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7da418566120> I0425 14:45:29.091447 138233766950720 checkpointing.py:302] Checkpoint manager created! I0425 14:45:30.077957 138233766950720 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0425 14:45:30.078078 138233766950720 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0425 14:45:31.511467 138233766950720 maxtext_utils.py:1889] decoder/decoder_norm/scale/value Shape: float32[2048] Physical: (None,) I0425 14:45:31.511584 138233766950720 maxtext_utils.py:1889] decoder/layers/mlp/wi_0/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0425 14:45:31.511637 138233766950720 maxtext_utils.py:1889] decoder/layers/mlp/wi_1/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0425 14:45:31.511682 138233766950720 maxtext_utils.py:1889] decoder/layers/mlp/wo/kernel/value Shape: float32[7168,16,2048] Physical: (None, None, 'fsdp') I0425 14:45:31.511720 138233766950720 maxtext_utils.py:1889] decoder/layers/post_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0425 14:45:31.511755 138233766950720 maxtext_utils.py:1889] decoder/layers/pre_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0425 14:45:31.511792 138233766950720 maxtext_utils.py:1889] decoder/layers/self_attention/key/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0425 14:45:31.511828 138233766950720 maxtext_utils.py:1889] decoder/layers/self_attention/out/kernel/value Shape: float32[16,16,128,2048] Physical: (None, None, None, 'fsdp') I0425 14:45:31.511862 138233766950720 maxtext_utils.py:1889] decoder/layers/self_attention/query/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0425 14:45:31.511896 138233766950720 maxtext_utils.py:1889] decoder/layers/self_attention/value/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0425 14:45:31.511930 138233766950720 maxtext_utils.py:1889] decoder/logits_dense/kernel/value Shape: float32[2048,32000] Physical: ('fsdp', None) I0425 14:45:31.511963 138233766950720 maxtext_utils.py:1889] token_embedder/embedding/value Shape: float32[32000,2048] Physical: (None, 'fsdp') I0425 14:45:31.917368 138233766950720 nnx_decoders.py:465] nnx_decoders/carry Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0425 14:45:31.917463 138233766950720 nnx_decoders.py:465] nnx_decoders/carry Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0425 14:45:31.922788 138233766950720 nnx_decoders.py:465] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0425 14:45:31.922847 138233766950720 nnx_decoders.py:465] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0425 14:45:31.939515 138233766950720 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn'). I0425 14:45:31.939575 138233766950720 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0425 14:45:31.955471 138233766950720 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn'). I0425 14:45:31.955538 138233766950720 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0425 14:45:31.980741 138233766950720 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim'). I0425 14:45:31.980809 138233766950720 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 14:45:31.996827 138233766950720 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim'). I0425 14:45:31.996888 138233766950720 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 14:45:32.012743 138233766950720 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim'). I0425 14:45:32.012805 138233766950720 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 14:45:32.042353 138233766950720 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch_attn', 'activation_length_attn', 'activation_heads', 'activation_kv'). I0425 14:45:32.042433 138233766950720 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 14:45:32.062370 138233766950720 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0425 14:45:32.062435 138233766950720 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0425 14:45:43.443862 138233766950720 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. I0425 14:45:43.446338 138233766950720 metric_logger.py:301] number parameters: 1.104 billion I0425 14:45:54.887023 138233766950720 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0425 14:45:55.038773 138233766950720 checkpointing.py:798] Waited 0.1517319679260254 seconds for step 0 to finish before starting checkpointing. I0425 14:45:55.040909 138233766950720 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0425 14:45:55.042600 138233766950720 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 0 I0425 14:45:55.043944 138233766950720 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_16_zarr3_true/checkpoints/0. I0425 14:45:55.387410 138233766950720 signaling_client.py:364] Using JaxDistributedSignalingClient I0425 14:45:55.388337 138233766950720 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array. I0425 14:45:55.388395 138233766950720 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 14:45:55.663308 138233766950720 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.276703s I0425 14:45:55.663481 138233766950720 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 5.387 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28633737564086914 s) (per-host) I0425 14:45:55.663540 138233766950720 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.286403s (batch_requests_ready=0.003329s, total_serialization_initiated=0.283000s, others=0.000074s) I0425 14:45:55.663643 138233766950720 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.290448s (all_items=0.000017s, per_item={'items': '0.00001740'}, temp_paths=0.290431) I0425 14:45:55.664451 138233766950720 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.62 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_16_zarr3_true/checkpoints/0. I0425 14:45:55.664772 138105454262016 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-25 15:05:55.664736 I0425 14:45:55.673887 138233766950720 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0425 14:45:55.674165 138099036256000 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0425 14:45:55.674299 138233766950720 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_16_zarr3_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777128355.0408916, 'wait_for_prev_duration_secs': 5.841255187988281e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777128355.0426412, 'checkpointer_blocking_duration_secs': 0.622281551361084, 'get_old_steps_start_time': 1777128355.6649456, 'get_old_steps_duration_secs': 3.0040740966796875e-05, 'checkpoint_manager_blocking_start_time': 1777128355.039202, 'checkpoint_manager_blocking_duration_secs': 0.6350576877593994} I0425 14:45:55.674415 138233766950720 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0425 14:45:55.674484 138233766950720 max_utils.py:750] Memstats: After params initialized: I0425 14:45:55.674535 138233766950720 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0)) I0425 14:45:55.674565 138233766950720 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0)) I0425 14:45:55.674591 138233766950720 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0)) I0425 14:45:55.674613 138233766950720 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0)) I0425 14:45:55.991432 138233766950720 metric_logger.py:196] completed step: 0, seconds: 11.440, TFLOP/s/device: 1.188, Tokens/s/device: 179.028, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52786.469 I0425 14:45:56.161144 138233766950720 metric_logger.py:196] completed step: 1, seconds: 1.102, TFLOP/s/device: 12.324, Tokens/s/device: 1857.627, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52786.469 I0425 14:45:56.576853 138233766950720 metric_logger.py:196] completed step: 2, seconds: 0.023, TFLOP/s/device: 581.268, Tokens/s/device: 87614.973, total_weights: 65536, loss: 10.560, lm_loss: 10.560, perplexity: 38565.637 I0425 14:45:56.724252 138233766950720 metric_logger.py:196] completed step: 3, seconds: 0.406, TFLOP/s/device: 33.483, Tokens/s/device: 5046.983, total_weights: 65536, loss: 9.979, lm_loss: 9.979, perplexity: 21564.932 I0425 14:45:56.730036 138233766950720 checkpointing.py:794] Waiting for step 5 to finish before checkpoint... I0425 14:45:57.019691 138233766950720 checkpointing.py:798] Waited 0.2896265983581543 seconds for step 5 to finish before starting checkpointing. I0425 14:45:57.022370 138233766950720 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0425 14:45:58.745341 2816 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0425 14:46:00.783662 138102764988160 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_16_zarr3_true/checkpoints/0/items/array_metadatas/process_6 I0425 14:46:32.444617 138105454262016 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 42.614 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 37.06742572784424 s) (per-host) I0425 14:46:32.444745 138105454262016 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 36.779861s. I0425 14:46:42.299550 138105454262016 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 46.634649s. I0425 14:46:42.299835 138099036256000 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0425 14:46:42.299970 138099036256000 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0425 14:46:42.300025 138099036256000 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0425 14:46:42.302827 138099036256000 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0425 14:46:42.303023 138233766950720 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 14:46:42.303186 138233766950720 checkpoint_manager.py:1452] Waiting for previous save to complete took 45.280816 seconds. If this number is high, consider checkpointing less frequently. I0425 14:46:42.305372 138233766950720 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 5 I0425 14:46:42.307816 138233766950720 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_16_zarr3_true/checkpoints/5. I0425 14:46:42.597702 138233766950720 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array. I0425 14:46:42.597796 138233766950720 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 14:46:42.634493 138233766950720 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.038339s I0425 14:46:42.634655 138233766950720 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 33.734 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04572701454162598 s) (per-host) I0425 14:46:42.634709 138233766950720 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.045789s (batch_requests_ready=0.002942s, total_serialization_initiated=0.042779s, others=0.000068s) I0425 14:46:42.634803 138233766950720 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.050547s (all_items=0.000016s, per_item={'items': '0.00001574'}, temp_paths=0.050532) I0425 14:46:42.635542 138233766950720 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.33 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_16_zarr3_true/checkpoints/5. I0425 14:46:42.635932 138099036256000 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-25 15:06:42.635900 I0425 14:46:42.652825 138233766950720 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=5] Starting CheckpointManager Save Finalize thread=save_finalize I0425 14:46:42.653155 138104941836032 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0425 14:46:42.653320 138233766950720 standard_logger.py:34] {'step': 5, '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_16_zarr3_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777128357.0223396, 'wait_for_prev_duration_secs': 45.280816078186035, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777128402.3054109, 'checkpointer_blocking_duration_secs': 0.3306620121002197, 'get_old_steps_start_time': 1777128402.6361089, 'get_old_steps_duration_secs': 3.147125244140625e-05, 'checkpoint_manager_blocking_start_time': 1777128357.0200462, 'checkpoint_manager_blocking_duration_secs': 45.63323950767517} I0425 14:46:42.653440 138233766950720 checkpointing.py:409] Started an asynchronous checkpoint save for step 5 I0425 14:46:42.654510 138233766950720 metric_logger.py:196] completed step: 4, seconds: 0.164, TFLOP/s/device: 82.649, Tokens/s/device: 12457.800, total_weights: 65536, loss: 9.457, lm_loss: 9.457, perplexity: 12802.436 I0425 14:46:42.662347 138233766950720 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.477, Tokens/s/device: 13939.085, total_weights: 65536, loss: 8.955, lm_loss: 8.955, perplexity: 7748.778 I0425 14:46:47.831533 138102764988160 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_16_zarr3_true/checkpoints/5/items/array_metadatas/process_6 I0425 14:47:06.223076 138233766950720 metric_logger.py:196] completed step: 6, seconds: 45.930, TFLOP/s/device: 0.296, Tokens/s/device: 44.589, total_weights: 65536, loss: 8.465, lm_loss: 8.465, perplexity: 4743.984 I0425 14:47:06.370442 138233766950720 metric_logger.py:196] completed step: 7, seconds: 23.416, TFLOP/s/device: 0.580, Tokens/s/device: 87.463, total_weights: 65536, loss: 7.998, lm_loss: 7.998, perplexity: 2976.266 I0425 14:47:06.518308 138233766950720 metric_logger.py:196] completed step: 8, seconds: 0.153, TFLOP/s/device: 88.799, Tokens/s/device: 13384.746, total_weights: 65536, loss: 7.567, lm_loss: 7.567, perplexity: 1933.479 I0425 14:47:06.666533 138233766950720 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0425 14:47:06.667286 138233766950720 checkpointing.py:798] Waited 0.0007624626159667969 seconds for step 9 to finish before starting checkpointing. I0425 14:47:06.669202 138233766950720 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=5][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0425 14:47:24.776816 138099036256000 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 37.442 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.18784999847412 s) (per-host) I0425 14:47:24.776941 138099036256000 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.140900s. I0425 14:47:31.758955 138099036256000 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 49.122900s. I0425 14:47:31.759282 138104941836032 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0425 14:47:31.759415 138104941836032 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0425 14:47:31.759467 138104941836032 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=5] CheckpointManager Save Finalize is syncing with other hosts... I0425 14:47:31.761935 138104941836032 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=5] CheckpointManager Save Finalize is done on all hosts. I0425 14:47:31.762126 138233766950720 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=5][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=5. W0425 14:47:31.762258 138233766950720 checkpoint_manager.py:1452] Waiting for previous save to complete took 25.093059 seconds. If this number is high, consider checkpointing less frequently. I0425 14:47:31.763836 138233766950720 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 9 I0425 14:47:31.765952 138233766950720 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_16_zarr3_true/checkpoints/9. I0425 14:47:32.062835 138233766950720 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array. I0425 14:47:32.062931 138233766950720 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 14:47:32.096367 138233766950720 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.035117s I0425 14:47:32.096526 138233766950720 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 36.353 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04243350028991699 s) (per-host) I0425 14:47:32.096580 138233766950720 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.042494s (batch_requests_ready=0.003019s, total_serialization_initiated=0.039410s, others=0.000065s) I0425 14:47:32.096666 138233766950720 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.046456s (all_items=0.000011s, per_item={'items': '0.00001073'}, temp_paths=0.046445) I0425 14:47:32.097367 138233766950720 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.33 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_16_zarr3_true/checkpoints/9. I0425 14:47:32.097708 138104941836032 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-25 15:07:32.097672 I0425 14:47:32.099724 138233766950720 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0425 14:47:32.099948 138102764988160 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0425 14:47:32.100049 138233766950720 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_16_zarr3_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777128426.6691716, 'wait_for_prev_duration_secs': 25.093058586120605, 'time_between_consecutive_saves_sec': 24.36630344390869, 'checkpointer_blocking_start_time': 1777128451.7638757, 'checkpointer_blocking_duration_secs': 0.3339393138885498, 'get_old_steps_start_time': 1777128452.0978336, 'get_old_steps_duration_secs': 2.5510787963867188e-05, 'checkpoint_manager_blocking_start_time': 1777128426.667567, 'checkpoint_manager_blocking_duration_secs': 25.432451486587524} I0425 14:47:32.100224 138233766950720 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0425 14:47:32.100276 138233766950720 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0425 14:47:37.163542 138082619729664 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_16_zarr3_true/checkpoints/9/items/array_metadatas/process_6 I0425 14:48:13.613944 138104941836032 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 38.008 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.559809923172 s) (per-host) I0425 14:48:13.614065 138104941836032 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.515664s. I0425 14:48:21.528151 138104941836032 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 49.429734s. I0425 14:48:21.528436 138102764988160 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0425 14:48:21.528585 138102764988160 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0425 14:48:21.528628 138102764988160 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0425 14:48:21.531281 138102764988160 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0425 14:48:21.531455 138233766950720 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 14:48:21.531626 138233766950720 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0425 14:48:21.532685 138233766950720 metric_logger.py:196] completed step: 9, seconds: 0.148, TFLOP/s/device: 91.940, Tokens/s/device: 13858.157, total_weights: 65536, loss: 7.176, lm_loss: 7.176, perplexity: 1307.366 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Sat Apr 25 14:48:32 UTC 2026 EXIT_CODE=0