XPK Start: Fri Apr 17 03:03:40 UTC 2026 PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used. 2026-04-17 03:04:04.835335: 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) I0417 03:04:05.011952 135628788725568 max_utils.py:273] Attempting to initialize the jax distributed system... I0417 03:04:14.052809 135628788725568 distributed.py:149] Starting JAX distributed service on [::]:8482 I0417 03:04:14.055088 135628788725568 distributed.py:172] Connecting to JAX distributed service on mt-07-eval-1c79d-slice-job-0-0.mt-07-eval-1c79d:8482 I0417 03:04:15.018014 135628788725568 max_utils.py:284] Jax distributed system initialized! I0417 03:04:21.111504 135628788725568 max_utils.py:800] System Information: Jax Version: 0.9.2 I0417 03:04:21.111612 135628788725568 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0417 03:04:21.111653 135628788725568 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 I0417 03:04:21.111687 135628788725568 train_utils.py:377] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0417 03:04:21.792619 135628788725568 maxtext_utils.py:1687] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0417 03:04:21.793214 135628788725568 maxtext_utils.py:1687] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0417 03:04:21.793396 135628788725568 checkpointing.py:688] Setting up checkpoint logger... I0417 03:04:21.793446 135628788725568 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0417 03:04:21.793488 135628788725568 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0417 03:04:21.793817 135628788725568 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 0x7b59f3518ce0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0417 03:04:25.093799 135628788725568 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0417 03:04:25.094051 135628788725568 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 0x7b458c764440>}, handler_registry=None I0417 03:04:25.094286 135628788725568 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7b458c764440>` 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`. I0417 03:04:25.094335 135628788725568 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7b458c767170>` 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`. I0417 03:04:25.094370 135628788725568 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 0x7b458c764440>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7b458c764440>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7b458c767170>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7b458c767170>}). I0417 03:04:25.094702 135628788725568 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0417 03:04:25.094775 135628788725568 async_checkpointer.py:192] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7b449c38c7c0> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0417 03:04:26.286224 135628788725568 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260417_023710/linen_xpk_feat_nnx_post_train_fixes_20260417_023710_07_eval/checkpoints I0417 03:04:27.581662 135628788725568 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/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260417_023710/linen_xpk_feat_nnx_post_train_fixes_20260417_023710_07_eval/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7b458c7650a0> I0417 03:04:27.581872 135628788725568 checkpointing.py:302] Checkpoint manager created! I0417 03:04:28.522859 135628788725568 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0417 03:04:28.522961 135628788725568 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0417 03:04:28.907235 135628788725568 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0417 03:04:28.907325 135628788725568 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0417 03:04:28.923778 135628788725568 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0417 03:04:28.923851 135628788725568 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0417 03:04:28.947813 135628788725568 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0417 03:04:28.947894 135628788725568 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0417 03:04:28.964369 135628788725568 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0417 03:04:28.964432 135628788725568 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0417 03:04:28.980806 135628788725568 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0417 03:04:28.980874 135628788725568 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0417 03:04:29.005659 135628788725568 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0417 03:04:29.005725 135628788725568 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0417 03:04:29.027402 135628788725568 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0417 03:04:29.027464 135628788725568 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0417 03:04:29.243789 135628788725568 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0417 03:04:29.243906 135628788725568 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0417 03:04:30.670632 135628788725568 maxtext_utils.py:1796] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0417 03:04:30.670760 135628788725568 maxtext_utils.py:1796] params/params/decoder/layers/mlp/wi_0/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0417 03:04:30.670813 135628788725568 maxtext_utils.py:1796] params/params/decoder/layers/mlp/wi_1/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0417 03:04:30.670884 135628788725568 maxtext_utils.py:1796] params/params/decoder/layers/mlp/wo/kernel Shape: float32[7168,16,2048] Logical: P('mlp', 'layers', 'embed') Physical: (None, None, 'fsdp') I0417 03:04:30.670938 135628788725568 maxtext_utils.py:1796] params/params/decoder/layers/post_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0417 03:04:30.670975 135628788725568 maxtext_utils.py:1796] params/params/decoder/layers/pre_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0417 03:04:30.671024 135628788725568 maxtext_utils.py:1796] params/params/decoder/layers/self_attention/key/kernel Shape: float32[2048,16,16,128] Logical: P('embed', 'layers', 'kv_heads', 'kv_head_dim') Physical: ('fsdp', None, None, None) I0417 03:04:30.671076 135628788725568 maxtext_utils.py:1796] params/params/decoder/layers/self_attention/out/kernel Shape: float32[16,16,128,2048] Logical: P('heads', 'layers', 'kv', 'embed') Physical: (None, None, None, 'fsdp') I0417 03:04:30.671115 135628788725568 maxtext_utils.py:1796] params/params/decoder/layers/self_attention/query/kernel Shape: float32[2048,16,16,128] Logical: P('embed', 'layers', 'q_heads', 'kv') Physical: ('fsdp', None, None, None) I0417 03:04:30.671149 135628788725568 maxtext_utils.py:1796] params/params/decoder/layers/self_attention/value/kernel Shape: float32[2048,16,16,128] Logical: P('embed', 'layers', 'kv_heads', 'kv_head_dim') Physical: ('fsdp', None, None, None) I0417 03:04:30.671195 135628788725568 maxtext_utils.py:1796] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', None) I0417 03:04:30.671241 135628788725568 maxtext_utils.py:1796] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0417 03:04:31.171492 135628788725568 train.py:157] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0417 03:04:31.171593 135628788725568 train.py:157] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0417 03:04:31.187394 135628788725568 train.py:164] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0417 03:04:31.187451 135628788725568 train.py:164] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0417 03:04:42.226646 135628788725568 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. I0417 03:04:42.227497 135628788725568 metric_logger.py:289] number parameters: 1.104 billion I0417 03:04:53.554260 135628788725568 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0417 03:04:53.708753 135628788725568 checkpointing.py:798] Waited 0.15447115898132324 seconds for step 0 to finish before starting checkpointing. I0417 03:04:53.711477 135628788725568 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0417 03:04:53.713303 135628788725568 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 0 I0417 03:04:53.714681 135628788725568 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260417_023710/linen_xpk_feat_nnx_post_train_fixes_20260417_023710_07_eval/checkpoints/0. I0417 03:04:54.477625 135628788725568 signaling_client.py:364] Using JaxDistributedSignalingClient I0417 03:04:54.478592 135628788725568 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0417 03:04:54.478649 135628788725568 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 I0417 03:04:54.758402 135628788725568 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.280856s I0417 03:04:54.758576 135628788725568 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 5.388 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28630971908569336 s) (per-host) I0417 03:04:54.758634 135628788725568 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.286377s (batch_requests_ready=0.002173s, total_serialization_initiated=0.284128s, others=0.000076s) I0417 03:04:54.758724 135628788725568 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.290368s (all_items=0.000019s, per_item={'items': '0.00001860'}, temp_paths=0.290350) I0417 03:04:54.759590 135628788725568 event_tracking.py:125] [process=6] [async] Finished blocking save in 1.05 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260417_023710/linen_xpk_feat_nnx_post_train_fixes_20260417_023710_07_eval/checkpoints/0. I0417 03:04:54.759888 135499967895296 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-17 03:24:54.759855 I0417 03:04:54.772038 135628788725568 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0417 03:04:54.772361 135498349664000 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0417 03:04:54.772527 135628788725568 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260417_023710/linen_xpk_feat_nnx_post_train_fixes_20260417_023710_07_eval/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776395093.711457, 'wait_for_prev_duration_secs': 6.222724914550781e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776395093.7133412, 'checkpointer_blocking_duration_secs': 1.0466997623443604, 'get_old_steps_start_time': 1776395094.7600667, 'get_old_steps_duration_secs': 3.0040740966796875e-05, 'checkpoint_manager_blocking_start_time': 1776395093.7093034, 'checkpoint_manager_blocking_duration_secs': 1.063185691833496} I0417 03:04:54.772639 135628788725568 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0417 03:04:54.772689 135628788725568 max_utils.py:750] Memstats: After params initialized: I0417 03:04:54.772737 135628788725568 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0)) I0417 03:04:54.772772 135628788725568 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0)) I0417 03:04:54.772796 135628788725568 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0)) I0417 03:04:54.772834 135628788725568 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0)) I0417 03:04:55.087066 135628788725568 metric_logger.py:185] completed step: 0, seconds: 11.327, TFLOP/s/device: 1.200, Tokens/s/device: 180.812, total_weights: 65536, loss: 10.874 I0417 03:04:55.272200 135628788725568 metric_logger.py:185] completed step: 1, seconds: 1.532, TFLOP/s/device: 8.872, Tokens/s/device: 1337.209, total_weights: 65536, loss: 10.874 I0417 03:04:55.687919 135628788725568 metric_logger.py:185] completed step: 2, seconds: 0.038, TFLOP/s/device: 357.622, Tokens/s/device: 53904.667, total_weights: 65536, loss: 10.262 I0417 03:04:55.835003 135628788725568 metric_logger.py:185] completed step: 3, seconds: 0.416, TFLOP/s/device: 32.696, Tokens/s/device: 4928.266, total_weights: 65536, loss: 9.734 I0417 03:04:56.129948 135628788725568 metric_logger.py:185] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.775, Tokens/s/device: 13381.073, total_weights: 65536, loss: 9.277 I0417 03:04:56.135552 135628788725568 metric_logger.py:185] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.396, Tokens/s/device: 13926.952, total_weights: 65536, loss: 8.892 I0417 03:04:58.521173 2838 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0417 03:05:00.893731 135498358056704 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260417_023710/linen_xpk_feat_nnx_post_train_fixes_20260417_023710_07_eval/checkpoints/0/items/array_metadatas/process_6 I0417 03:05:17.786285 135628788725568 metric_logger.py:185] completed step: 6, seconds: 0.295, TFLOP/s/device: 46.013, Tokens/s/device: 6935.508, total_weights: 65536, loss: 8.592 I0417 03:05:17.933486 135628788725568 metric_logger.py:185] completed step: 7, seconds: 21.504, TFLOP/s/device: 0.632, Tokens/s/device: 95.238, total_weights: 65536, loss: 8.384 I0417 03:05:18.080668 135628788725568 metric_logger.py:185] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.361, Tokens/s/device: 13469.519, total_weights: 65536, loss: 8.255 I0417 03:05:18.227699 135628788725568 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0417 03:05:18.228361 135628788725568 checkpointing.py:798] Waited 0.0006821155548095703 seconds for step 9 to finish before starting checkpointing. I0417 03:05:18.230373 135628788725568 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0417 03:05:31.728101 135499967895296 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 42.399 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 37.25579595565796 s) (per-host) I0417 03:05:31.728223 135499967895296 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 36.968224s. I0417 03:05:41.675189 135499967895296 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 46.915173s. I0417 03:05:41.675472 135498349664000 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0417 03:05:41.675611 135498349664000 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0417 03:05:41.675661 135498349664000 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0417 03:05:41.677178 135498349664000 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0417 03:05:41.677345 135628788725568 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. W0417 03:05:41.677477 135628788725568 checkpoint_manager.py:1452] Waiting for previous save to complete took 23.447103 seconds. If this number is high, consider checkpointing less frequently. I0417 03:05:41.679385 135628788725568 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 9 I0417 03:05:41.681459 135628788725568 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260417_023710/linen_xpk_feat_nnx_post_train_fixes_20260417_023710_07_eval/checkpoints/9. I0417 03:05:42.391768 135628788725568 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0417 03:05:42.391878 135628788725568 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 I0417 03:05:42.425615 135628788725568 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.035025s I0417 03:05:42.425797 135628788725568 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 40.088 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.03847980499267578 s) (per-host) I0417 03:05:42.425869 135628788725568 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.038561s (batch_requests_ready=0.001810s, total_serialization_initiated=0.036661s, others=0.000089s) I0417 03:05:42.425963 135628788725568 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.042820s (all_items=0.000016s, per_item={'items': '0.00001574'}, temp_paths=0.042804) I0417 03:05:42.426638 135628788725568 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.75 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260417_023710/linen_xpk_feat_nnx_post_train_fixes_20260417_023710_07_eval/checkpoints/9. I0417 03:05:42.426926 135499417745152 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-17 03:25:42.426890 I0417 03:05:42.428659 135628788725568 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0417 03:05:42.428945 135498349664000 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0417 03:05:42.429108 135628788725568 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260417_023710/linen_xpk_feat_nnx_post_train_fixes_20260417_023710_07_eval/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776395118.2303429, 'wait_for_prev_duration_secs': 23.447103261947632, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776395141.6794233, 'checkpointer_blocking_duration_secs': 0.747645378112793, 'get_old_steps_start_time': 1776395142.4270904, 'get_old_steps_duration_secs': 2.8133392333984375e-05, 'checkpoint_manager_blocking_start_time': 1776395118.2285833, 'checkpoint_manager_blocking_duration_secs': 24.200491666793823} I0417 03:05:42.429213 135628788725568 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0417 03:05:42.429258 135628788725568 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0417 03:05:48.822252 135478502225664 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260417_023710/linen_xpk_feat_nnx_post_train_fixes_20260417_023710_07_eval/checkpoints/9/items/array_metadatas/process_6 I0417 03:06:24.440502 135499417745152 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 37.562 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.05314326286316 s) (per-host) I0417 03:06:24.440620 135499417745152 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.013580s. I0417 03:06:33.326695 135499417745152 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 50.899640s. I0417 03:06:33.326964 135498349664000 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0417 03:06:33.327031 135498349664000 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0417 03:06:33.327081 135498349664000 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0417 03:06:33.329712 135498349664000 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0417 03:06:33.329916 135628788725568 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. I0417 03:06:33.330071 135628788725568 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0417 03:06:33.330798 135628788725568 metric_logger.py:185] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.330, Tokens/s/device: 13917.014, total_weights: 65536, loss: 8.179 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Fri Apr 17 03:06:41 UTC 2026 EXIT_CODE=0