main (59e0f1759) vs test/pipeline-scan-nnx (5b21b66fc)| Metric | main 59e0f1759 | test/pipeline-scan-nnx 5b21b66fc | Diff (test/pipeline-scan-nnx − main) |
|---|---|---|---|
| Parameters | 1.104 billion | 1.104 billion | — |
| Final loss | 7.1810 | 7.1810 | 0 |
| TFLOP/s | 92.252 | 92.232 | -0.02 |
| Tok/s | 13905.3 | 13902.2 | -3.115 |
| Avg s/step | 7.668 | 7.768 | +0.1 |
| Memory % | 1.38 | 1.38 | 0 |
| JAX | 0.9.2 | 0.9.2 | — |
Diff = branch value − main value. Green = branch improved. Red = branch regressed.
XPK Start: Sat Apr 25 07:33:56 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 07:34:21.450062: 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 07:34:21.661243 139204217857856 max_utils.py:273] Attempting to initialize the jax distributed system... I0425 07:34:30.701868 139204217857856 distributed.py:149] Starting JAX distributed service on [::]:8482 I0425 07:34:30.704129 139204217857856 distributed.py:172] Connecting to JAX distributed service on mt-08-checkpoint-async--1r37d-slice-job-0-0.mt-08-checkpoint-async--1r37d:8482 I0425 07:34:31.918335 139204217857856 max_utils.py:284] Jax distributed system initialized! I0425 07:34:38.025483 139204217857856 max_utils.py:800] System Information: Jax Version: 0.9.2 I0425 07:34:38.025585 139204217857856 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0425 07:34:38.025633 139204217857856 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 07:34:38.025692 139204217857856 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0425 07:34:38.719029 139204217857856 maxtext_utils.py:1604] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0425 07:34:38.719330 139204217857856 checkpointing.py:677] Setting up checkpoint logger... I0425 07:34:38.719394 139204217857856 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True I0425 07:34:38.719449 139204217857856 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0425 07:34:38.719814 139204217857856 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 0x7e9a709e7680>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0425 07:34:41.552226 139204217857856 checkpointing.py:265] Enabling policy for fixed interval checkpointing. I0425 07:34:41.552459 139204217857856 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 0x7e861c40d8b0>}, handler_registry=None I0425 07:34:41.552722 139204217857856 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e861c40d8b0>` 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 07:34:41.552786 139204217857856 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e861c40df70>` 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 07:34:41.552838 139204217857856 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 0x7e861c40d8b0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e861c40d8b0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e861c40df70>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e861c40df70>}). I0425 07:34:41.553194 139204217857856 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0425 07:34:41.553286 139204217857856 async_checkpointer.py:192] [process=5][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7e861c1b9800> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0425 07:34:42.995147 139204217857856 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_08_checkpoint_async_true/checkpoints I0425 07:34:43.160899 139204217857856 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=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/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_08_checkpoint_async_true/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7e861c40ddc0> I0425 07:34:43.161085 139204217857856 checkpointing.py:301] Checkpoint manager created! I0425 07:34:44.097968 139204217857856 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0425 07:34:44.098085 139204217857856 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0425 07:34:44.477067 139204217857856 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0425 07:34:44.477160 139204217857856 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0425 07:34:44.493710 139204217857856 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0425 07:34:44.493769 139204217857856 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0425 07:34:44.517847 139204217857856 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0425 07:34:44.517917 139204217857856 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 07:34:44.534538 139204217857856 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0425 07:34:44.534600 139204217857856 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 07:34:44.551131 139204217857856 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0425 07:34:44.551208 139204217857856 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 07:34:44.576379 139204217857856 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0425 07:34:44.576450 139204217857856 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 07:34:44.598085 139204217857856 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0425 07:34:44.598152 139204217857856 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0425 07:34:44.811853 139204217857856 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint I0425 07:34:44.811963 139204217857856 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0425 07:34:46.245573 139204217857856 maxtext_utils.py:1707] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0425 07:34:46.245720 139204217857856 maxtext_utils.py:1707] params/params/decoder/layers/mlp/wi_0/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0425 07:34:46.245779 139204217857856 maxtext_utils.py:1707] params/params/decoder/layers/mlp/wi_1/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0425 07:34:46.245839 139204217857856 maxtext_utils.py:1707] params/params/decoder/layers/mlp/wo/kernel Shape: float32[7168,16,2048] Logical: P('mlp', 'layers', 'embed') Physical: (None, None, 'fsdp') I0425 07:34:46.245891 139204217857856 maxtext_utils.py:1707] params/params/decoder/layers/post_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0425 07:34:46.245930 139204217857856 maxtext_utils.py:1707] params/params/decoder/layers/pre_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0425 07:34:46.245988 139204217857856 maxtext_utils.py:1707] 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) I0425 07:34:46.246041 139204217857856 maxtext_utils.py:1707] 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') I0425 07:34:46.246080 139204217857856 maxtext_utils.py:1707] 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) I0425 07:34:46.246117 139204217857856 maxtext_utils.py:1707] 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) I0425 07:34:46.246166 139204217857856 maxtext_utils.py:1707] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', None) I0425 07:34:46.246221 139204217857856 maxtext_utils.py:1707] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0425 07:34:46.741486 139204217857856 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0425 07:34:46.741580 139204217857856 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0425 07:34:46.757268 139204217857856 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0425 07:34:46.757326 139204217857856 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0425 07:34:57.607289 139204217857856 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 07:34:57.608129 139204217857856 metric_logger.py:301] number parameters: 1.104 billion I0425 07:35:09.193685 139204217857856 checkpointing.py:772] Waiting for step 0 to finish before checkpoint... I0425 07:35:09.347340 139204217857856 checkpointing.py:776] Waited 0.15365052223205566 seconds for step 0 to finish before starting checkpointing. I0425 07:35:09.349579 139204217857856 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0425 07:35:09.351580 139204217857856 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 0 I0425 07:35:09.353010 139204217857856 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_08_checkpoint_async_true/checkpoints/0. I0425 07:35:09.665458 139204217857856 signaling_client.py:364] Using JaxDistributedSignalingClient I0425 07:35:09.666443 139204217857856 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0425 07:35:09.666502 139204217857856 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 07:35:09.940307 139204217857856 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.274924s I0425 07:35:09.940485 139204217857856 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 5.500 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28044867515563965 s) (per-host) I0425 07:35:09.940538 139204217857856 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.280512s (batch_requests_ready=0.002240s, total_serialization_initiated=0.278200s, others=0.000071s) I0425 07:35:09.940629 139204217857856 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.284742s (all_items=0.000018s, per_item={'items': '0.00001788'}, temp_paths=0.284724) I0425 07:35:09.941461 139204217857856 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.59 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_08_checkpoint_async_true/checkpoints/0. I0425 07:35:09.941767 139075212355328 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-25 07:55:09.941733 I0425 07:35:09.953262 139204217857856 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0425 07:35:09.953574 139070386308864 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0425 07:35:09.953723 139204217857856 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_08_checkpoint_async_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777102509.3495603, 'wait_for_prev_duration_secs': 6.151199340820312e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777102509.3516188, 'checkpointer_blocking_duration_secs': 0.5902988910675049, 'get_old_steps_start_time': 1777102509.9419436, 'get_old_steps_duration_secs': 3.147125244140625e-05, 'checkpoint_manager_blocking_start_time': 1777102509.3478587, 'checkpoint_manager_blocking_duration_secs': 0.605825662612915} I0425 07:35:09.953883 139204217857856 checkpointing.py:408] Started an asynchronous checkpoint save for step 0 I0425 07:35:09.953937 139204217857856 max_utils.py:750] Memstats: After params initialized: I0425 07:35:09.953989 139204217857856 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_18(process=5,(2,4,0,0)) I0425 07:35:09.954023 139204217857856 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_19(process=5,(3,4,0,0)) I0425 07:35:09.954051 139204217857856 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_22(process=5,(2,5,0,0)) I0425 07:35:09.954078 139204217857856 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_23(process=5,(3,5,0,0)) I0425 07:35:10.274363 139204217857856 metric_logger.py:196] completed step: 0, seconds: 11.585, TFLOP/s/device: 1.173, Tokens/s/device: 176.774, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875 I0425 07:35:10.521266 139204217857856 metric_logger.py:196] completed step: 1, seconds: 1.079, TFLOP/s/device: 12.591, Tokens/s/device: 1897.848, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875 I0425 07:35:10.934001 139204217857856 metric_logger.py:196] completed step: 2, seconds: 0.100, TFLOP/s/device: 136.260, Tokens/s/device: 20538.535, total_weights: 65536, loss: 10.560, lm_loss: 10.560, perplexity: 38547.719 I0425 07:35:11.081317 139204217857856 metric_logger.py:196] completed step: 3, seconds: 0.413, TFLOP/s/device: 32.886, Tokens/s/device: 4956.893, total_weights: 65536, loss: 9.980, lm_loss: 9.980, perplexity: 21590.506 I0425 07:35:11.085866 139204217857856 checkpointing.py:772] Waiting for step 5 to finish before checkpoint... I0425 07:35:11.375416 139204217857856 checkpointing.py:776] Waited 0.2895162105560303 seconds for step 5 to finish before starting checkpointing. I0425 07:35:11.378314 139204217857856 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0425 07:35:13.043615 2864 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0425 07:35:15.543012 139070929733376 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_08_checkpoint_async_true/checkpoints/0/items/array_metadatas/process_5 I0425 07:35:46.620497 139075212355328 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 42.738 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 36.96042084693909 s) (per-host) I0425 07:35:46.620627 139075212355328 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 36.678748s. I0425 07:35:55.186698 139075212355328 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 45.244771s. I0425 07:35:55.186964 139070386308864 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0425 07:35:55.187085 139070386308864 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0425 07:35:55.187138 139070386308864 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0425 07:35:55.188789 139070386308864 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0425 07:35:55.188978 139204217857856 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. W0425 07:35:55.189111 139204217857856 checkpoint_manager.py:1452] Waiting for previous save to complete took 43.810795 seconds. If this number is high, consider checkpointing less frequently. I0425 07:35:55.190945 139204217857856 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 5 I0425 07:35:55.193447 139204217857856 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_08_checkpoint_async_true/checkpoints/5. I0425 07:35:55.481607 139204217857856 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0425 07:35:55.481713 139204217857856 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 07:35:55.516243 139204217857856 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.035793s I0425 07:35:55.516419 139204217857856 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 39.282 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.039269208908081055 s) (per-host) I0425 07:35:55.516472 139204217857856 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.039331s (batch_requests_ready=0.001776s, total_serialization_initiated=0.037483s, others=0.000072s) I0425 07:35:55.516564 139204217857856 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.044365s (all_items=0.000015s, per_item={'items': '0.00001526'}, temp_paths=0.044350) I0425 07:35:55.518621 139204217857856 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.33 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_08_checkpoint_async_true/checkpoints/5. I0425 07:35:55.518929 139070386308864 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-25 07:55:55.518896 I0425 07:35:55.530670 139204217857856 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=5] Starting CheckpointManager Save Finalize thread=save_finalize I0425 07:35:55.530980 139070929733376 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0425 07:35:55.531141 139204217857856 standard_logger.py:34] {'step': 5, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_08_checkpoint_async_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777102511.3782854, 'wait_for_prev_duration_secs': 43.81079459190369, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777102555.190984, 'checkpointer_blocking_duration_secs': 0.3281073570251465, 'get_old_steps_start_time': 1777102555.519115, 'get_old_steps_duration_secs': 3.4332275390625e-05, 'checkpoint_manager_blocking_start_time': 1777102511.3760743, 'checkpoint_manager_blocking_duration_secs': 44.15503144264221} I0425 07:35:55.531259 139204217857856 checkpointing.py:408] Started an asynchronous checkpoint save for step 5 I0425 07:35:55.532133 139204217857856 metric_logger.py:196] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.881, Tokens/s/device: 13397.179, total_weights: 65536, loss: 9.460, lm_loss: 9.460, perplexity: 12840.355 I0425 07:35:55.538544 139204217857856 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.285, Tokens/s/device: 13910.209, total_weights: 65536, loss: 8.959, lm_loss: 8.959, perplexity: 7776.467 I0425 07:36:00.757247 139053219436288 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_08_checkpoint_async_true/checkpoints/5/items/array_metadatas/process_5 I0425 07:36:18.054320 139204217857856 metric_logger.py:196] completed step: 6, seconds: 44.451, TFLOP/s/device: 0.306, Tokens/s/device: 46.073, total_weights: 65536, loss: 8.469, lm_loss: 8.469, perplexity: 4762.740 I0425 07:36:18.201704 139204217857856 metric_logger.py:196] completed step: 7, seconds: 22.370, TFLOP/s/device: 0.607, Tokens/s/device: 91.553, total_weights: 65536, loss: 8.003, lm_loss: 8.003, perplexity: 2989.151 I0425 07:36:18.349203 139204217857856 metric_logger.py:196] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.164, Tokens/s/device: 13439.819, total_weights: 65536, loss: 7.572, lm_loss: 7.572, perplexity: 1943.098 I0425 07:36:18.495793 139204217857856 checkpointing.py:772] Waiting for step 9 to finish before checkpoint... I0425 07:36:18.496416 139204217857856 checkpointing.py:776] Waited 0.0006437301635742188 seconds for step 9 to finish before starting checkpointing. I0425 07:36:18.498522 139204217857856 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=5][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0425 07:36:36.639727 139070386308864 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 38.375 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.162537574768066 s) (per-host) I0425 07:36:36.639852 139070386308864 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.120805s. I0425 07:36:44.671406 139070386308864 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 49.152340s. I0425 07:36:44.671729 139070929733376 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0425 07:36:44.671846 139070929733376 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0425 07:36:44.671896 139070929733376 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=5] CheckpointManager Save Finalize is syncing with other hosts... I0425 07:36:44.673525 139070929733376 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=5] CheckpointManager Save Finalize is done on all hosts. I0425 07:36:44.673718 139204217857856 checkpoint_manager.py:2032] [process=5][thread=MainThread][step=5][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=5. W0425 07:36:44.673846 139204217857856 checkpoint_manager.py:1452] Waiting for previous save to complete took 26.175329 seconds. If this number is high, consider checkpointing less frequently. I0425 07:36:44.675390 139204217857856 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 9 I0425 07:36:44.677469 139204217857856 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_08_checkpoint_async_true/checkpoints/9. I0425 07:36:44.962568 139204217857856 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0425 07:36:44.962671 139204217857856 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 07:36:44.999148 139204217857856 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.037389s I0425 07:36:44.999301 139204217857856 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 37.767 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04084467887878418 s) (per-host) I0425 07:36:44.999366 139204217857856 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.040921s (batch_requests_ready=0.001649s, total_serialization_initiated=0.039190s, others=0.000082s) I0425 07:36:44.999471 139204217857856 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.045449s (all_items=0.000010s, per_item={'items': '0.00001025'}, temp_paths=0.045439) I0425 07:36:45.000184 139204217857856 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.32 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_08_checkpoint_async_true/checkpoints/9. I0425 07:36:45.000465 139070929733376 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-25 07:56:45.000431 I0425 07:36:45.009576 139204217857856 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0425 07:36:45.009883 139053219436288 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0425 07:36:45.010050 139204217857856 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_08_checkpoint_async_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777102578.4984932, 'wait_for_prev_duration_secs': 26.175329208374023, 'time_between_consecutive_saves_sec': 23.30966353416443, 'checkpointer_blocking_start_time': 1777102604.6754274, 'checkpointer_blocking_duration_secs': 0.3251767158508301, 'get_old_steps_start_time': 1777102605.0006208, 'get_old_steps_duration_secs': 2.5272369384765625e-05, 'checkpoint_manager_blocking_start_time': 1777102578.4966462, 'checkpoint_manager_blocking_duration_secs': 26.513370752334595} I0425 07:36:45.010163 139204217857856 checkpointing.py:408] Started an asynchronous checkpoint save for step 9 I0425 07:36:45.010206 139204217857856 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0425 07:36:50.061917 139053122975488 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_08_checkpoint_async_true/checkpoints/9/items/array_metadatas/process_5 I0425 07:37:26.909519 139070929733376 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 37.653 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.95103311538696 s) (per-host) I0425 07:37:26.909623 139070929733376 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.909051s. I0425 07:37:32.388534 139070929733376 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 47.387947s. I0425 07:37:32.388808 139053219436288 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0425 07:37:32.388923 139053219436288 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0425 07:37:32.388970 139053219436288 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0425 07:37:32.390679 139053219436288 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0425 07:37:32.390839 139204217857856 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. I0425 07:37:32.390989 139204217857856 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0425 07:37:32.391906 139204217857856 metric_logger.py:196] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.252, Tokens/s/device: 13905.297, total_weights: 65536, loss: 7.181, lm_loss: 7.181, perplexity: 1314.495 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Sat Apr 25 07:37:41 UTC 2026 EXIT_CODE=0
XPK Start: Sat Apr 25 20:31:08 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 20:31:33.236955: 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 20:31:33.448179 135310452000576 max_utils.py:273] Attempting to initialize the jax distributed system... I0425 20:31:42.488241 135310452000576 distributed.py:149] Starting JAX distributed service on [::]:8482 I0425 20:31:42.490605 135310452000576 distributed.py:172] Connecting to JAX distributed service on mt-08-checkpoint-async--hd516-slice-job-0-0.mt-08-checkpoint-async--hd516:8482 I0425 20:31:43.748279 135310452000576 max_utils.py:284] Jax distributed system initialized! I0425 20:31:50.191308 135310452000576 max_utils.py:800] System Information: Jax Version: 0.9.2 I0425 20:31:50.191416 135310452000576 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0425 20:31:50.191456 135310452000576 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 20:31:50.191491 135310452000576 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0425 20:31:50.888948 135310452000576 maxtext_utils.py:1565] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0425 20:31:50.889227 135310452000576 checkpointing.py:677] Setting up checkpoint logger... I0425 20:31:50.889287 135310452000576 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True I0425 20:31:50.889332 135310452000576 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0425 20:31:50.889704 135310452000576 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 0x7b0fca714b60>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0425 20:31:54.595040 135310452000576 checkpointing.py:265] Enabling policy for fixed interval checkpointing. I0425 20:31:54.595280 135310452000576 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 0x7afbc85cf950>}, handler_registry=None I0425 20:31:54.595520 135310452000576 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7afbc85cf950>` 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 20:31:54.595569 135310452000576 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7afbc85d0470>` 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 20:31:54.595604 135310452000576 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 0x7afbc85cf950>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7afbc85cf950>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7afbc85d0470>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7afbc85d0470>}). I0425 20:31:54.595961 135310452000576 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0425 20:31:54.596031 135310452000576 async_checkpointer.py:192] [process=5][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7afbc82c3560> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0425 20:31:55.337082 135310452000576 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_08_checkpoint_async_true/checkpoints I0425 20:31:55.778092 135310452000576 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=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/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_08_checkpoint_async_true/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7afbc85cff80> I0425 20:31:55.778274 135310452000576 checkpointing.py:301] Checkpoint manager created! I0425 20:31:56.701964 135310452000576 nnx_wrappers.py:453] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0425 20:31:56.702082 135310452000576 nnx_wrappers.py:453] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0425 20:31:57.081551 135310452000576 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0425 20:31:57.081646 135310452000576 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0425 20:31:57.098248 135310452000576 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0425 20:31:57.098309 135310452000576 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0425 20:31:57.121769 135310452000576 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0425 20:31:57.121841 135310452000576 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 20:31:57.138372 135310452000576 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0425 20:31:57.138434 135310452000576 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 20:31:57.154908 135310452000576 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0425 20:31:57.154977 135310452000576 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 20:31:57.179893 135310452000576 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0425 20:31:57.179966 135310452000576 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 20:31:57.201019 135310452000576 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0425 20:31:57.201094 135310452000576 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0425 20:31:57.411991 135310452000576 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint I0425 20:31:57.412098 135310452000576 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0425 20:31:58.853967 135310452000576 maxtext_utils.py:1668] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0425 20:31:58.854099 135310452000576 maxtext_utils.py:1668] params/params/decoder/layers/mlp/wi_0/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0425 20:31:58.854154 135310452000576 maxtext_utils.py:1668] params/params/decoder/layers/mlp/wi_1/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0425 20:31:58.854211 135310452000576 maxtext_utils.py:1668] params/params/decoder/layers/mlp/wo/kernel Shape: float32[7168,16,2048] Logical: P('mlp', 'layers', 'embed') Physical: (None, None, 'fsdp') I0425 20:31:58.854262 135310452000576 maxtext_utils.py:1668] params/params/decoder/layers/post_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0425 20:31:58.854300 135310452000576 maxtext_utils.py:1668] params/params/decoder/layers/pre_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0425 20:31:58.854351 135310452000576 maxtext_utils.py:1668] 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) I0425 20:31:58.854402 135310452000576 maxtext_utils.py:1668] 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') I0425 20:31:58.854442 135310452000576 maxtext_utils.py:1668] 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) I0425 20:31:58.854478 135310452000576 maxtext_utils.py:1668] 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) I0425 20:31:58.854524 135310452000576 maxtext_utils.py:1668] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', None) I0425 20:31:58.854572 135310452000576 maxtext_utils.py:1668] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0425 20:31:59.347817 135310452000576 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0425 20:31:59.347909 135310452000576 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0425 20:31:59.363413 135310452000576 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0425 20:31:59.363472 135310452000576 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0425 20:32:10.403955 135310452000576 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 20:32:10.404750 135310452000576 metric_logger.py:301] number parameters: 1.104 billion I0425 20:32:22.263717 135310452000576 checkpointing.py:772] Waiting for step 0 to finish before checkpoint... I0425 20:32:22.419400 135310452000576 checkpointing.py:776] Waited 0.15566182136535645 seconds for step 0 to finish before starting checkpointing. I0425 20:32:22.421699 135310452000576 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0425 20:32:22.423278 135310452000576 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 0 I0425 20:32:22.424800 135310452000576 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_08_checkpoint_async_true/checkpoints/0. I0425 20:32:23.150864 135310452000576 signaling_client.py:364] Using JaxDistributedSignalingClient I0425 20:32:23.151847 135310452000576 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0425 20:32:23.151904 135310452000576 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 20:32:23.427413 135310452000576 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.276623s I0425 20:32:23.427577 135310452000576 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 5.467 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28217315673828125 s) (per-host) I0425 20:32:23.427627 135310452000576 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.282233s (batch_requests_ready=0.002233s, total_serialization_initiated=0.279933s, others=0.000067s) I0425 20:32:23.427736 135310452000576 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.286346s (all_items=0.000018s, per_item={'items': '0.00001788'}, temp_paths=0.286328) I0425 20:32:23.428553 135310452000576 event_tracking.py:125] [process=5] [async] Finished blocking save in 1.01 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_08_checkpoint_async_true/checkpoints/0. I0425 20:32:23.428834 135183371060992 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-25 20:52:23.428809 I0425 20:32:23.443750 135310452000576 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0425 20:32:23.444060 135181783746304 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0425 20:32:23.444219 135310452000576 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_08_checkpoint_async_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777149142.4216816, 'wait_for_prev_duration_secs': 5.888938903808594e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777149142.4233167, 'checkpointer_blocking_duration_secs': 1.005631923675537, 'get_old_steps_start_time': 1777149143.4289746, 'get_old_steps_duration_secs': 3.123283386230469e-05, 'checkpoint_manager_blocking_start_time': 1777149142.419935, 'checkpoint_manager_blocking_duration_secs': 1.0242435932159424} I0425 20:32:23.444332 135310452000576 checkpointing.py:408] Started an asynchronous checkpoint save for step 0 I0425 20:32:23.444383 135310452000576 max_utils.py:750] Memstats: After params initialized: I0425 20:32:23.444432 135310452000576 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_18(process=5,(2,4,0,0)) I0425 20:32:23.444466 135310452000576 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_19(process=5,(3,4,0,0)) I0425 20:32:23.444492 135310452000576 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_22(process=5,(2,5,0,0)) I0425 20:32:23.444518 135310452000576 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_23(process=5,(3,5,0,0)) I0425 20:32:23.764956 135310452000576 metric_logger.py:196] completed step: 0, seconds: 11.859, TFLOP/s/device: 1.146, Tokens/s/device: 172.698, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875 I0425 20:32:23.946906 135310452000576 metric_logger.py:196] completed step: 1, seconds: 1.500, TFLOP/s/device: 9.061, Tokens/s/device: 1365.717, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875 I0425 20:32:24.360701 135310452000576 metric_logger.py:196] completed step: 2, seconds: 0.035, TFLOP/s/device: 389.439, Tokens/s/device: 58700.450, total_weights: 65536, loss: 10.560, lm_loss: 10.560, perplexity: 38547.719 I0425 20:32:24.508035 135310452000576 metric_logger.py:196] completed step: 3, seconds: 0.414, TFLOP/s/device: 32.815, Tokens/s/device: 4946.227, total_weights: 65536, loss: 9.980, lm_loss: 9.980, perplexity: 21590.506 I0425 20:32:24.512691 135310452000576 checkpointing.py:772] Waiting for step 5 to finish before checkpoint... I0425 20:32:24.801942 135310452000576 checkpointing.py:776] Waited 0.2892160415649414 seconds for step 5 to finish before starting checkpointing. I0425 20:32:24.805085 135310452000576 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0425 20:32:26.575936 2780 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0425 20:32:28.592353 135181792139008 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_08_checkpoint_async_true/checkpoints/0/items/array_metadatas/process_5 I0425 20:32:59.108441 135183371060992 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 43.923 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 35.96299767494202 s) (per-host) I0425 20:32:59.108560 135183371060992 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 35.679647s. I0425 20:33:08.938876 135183371060992 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 45.509920s. I0425 20:33:08.939195 135181783746304 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0425 20:33:08.939327 135181783746304 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0425 20:33:08.939378 135181783746304 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0425 20:33:08.942187 135181783746304 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0425 20:33:08.942380 135310452000576 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. W0425 20:33:08.942520 135310452000576 checkpoint_manager.py:1452] Waiting for previous save to complete took 44.137429 seconds. If this number is high, consider checkpointing less frequently. I0425 20:33:08.944438 135310452000576 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 5 I0425 20:33:08.946968 135310452000576 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_08_checkpoint_async_true/checkpoints/5. I0425 20:33:09.248272 135310452000576 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0425 20:33:09.248368 135310452000576 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 20:33:09.283412 135310452000576 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.036234s I0425 20:33:09.283575 135310452000576 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 38.892 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.03966331481933594 s) (per-host) I0425 20:33:09.283625 135310452000576 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.039722s (batch_requests_ready=0.001784s, total_serialization_initiated=0.037874s, others=0.000065s) I0425 20:33:09.283735 135310452000576 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.044696s (all_items=0.000016s, per_item={'items': '0.00001621'}, temp_paths=0.044680) I0425 20:33:09.284473 135310452000576 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.34 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_08_checkpoint_async_true/checkpoints/5. I0425 20:33:09.284789 135181783746304 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-25 20:53:09.284756 I0425 20:33:09.291859 135310452000576 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=5] Starting CheckpointManager Save Finalize thread=save_finalize I0425 20:33:09.292154 135157176592128 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0425 20:33:09.292323 135310452000576 standard_logger.py:34] {'step': 5, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_08_checkpoint_async_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777149144.8050547, 'wait_for_prev_duration_secs': 44.13742923736572, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777149188.9444776, 'checkpointer_blocking_duration_secs': 0.3404512405395508, 'get_old_steps_start_time': 1777149189.284952, 'get_old_steps_duration_secs': 2.9802322387695312e-05, 'checkpoint_manager_blocking_start_time': 1777149144.8025427, 'checkpoint_manager_blocking_duration_secs': 44.48974537849426} I0425 20:33:09.292431 135310452000576 checkpointing.py:408] Started an asynchronous checkpoint save for step 5 I0425 20:33:09.293214 135310452000576 metric_logger.py:196] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.702, Tokens/s/device: 13370.153, total_weights: 65536, loss: 9.460, lm_loss: 9.460, perplexity: 12840.355 I0425 20:33:09.299317 135310452000576 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.333, Tokens/s/device: 13917.393, total_weights: 65536, loss: 8.959, lm_loss: 8.959, perplexity: 7776.467 I0425 20:33:15.373420 135181792139008 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_08_checkpoint_async_true/checkpoints/5/items/array_metadatas/process_5 I0425 20:33:32.027921 135310452000576 metric_logger.py:196] completed step: 6, seconds: 44.785, TFLOP/s/device: 0.303, Tokens/s/device: 45.729, total_weights: 65536, loss: 8.469, lm_loss: 8.469, perplexity: 4762.740 I0425 20:33:32.175437 135310452000576 metric_logger.py:196] completed step: 7, seconds: 22.583, TFLOP/s/device: 0.602, Tokens/s/device: 90.689, total_weights: 65536, loss: 8.003, lm_loss: 8.003, perplexity: 2989.151 I0425 20:33:32.322763 135310452000576 metric_logger.py:196] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.341, Tokens/s/device: 13466.508, total_weights: 65536, loss: 7.572, lm_loss: 7.572, perplexity: 1943.098 I0425 20:33:32.469359 135310452000576 checkpointing.py:772] Waiting for step 9 to finish before checkpoint... I0425 20:33:32.470070 135310452000576 checkpointing.py:776] Waited 0.0007328987121582031 seconds for step 9 to finish before starting checkpointing. I0425 20:33:32.472130 135310452000576 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=5][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0425 20:33:52.278109 135181783746304 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 36.706 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 43.03415894508362 s) (per-host) I0425 20:33:52.278221 135181783746304 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.993318s. I0425 20:34:00.659319 135181783746304 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 51.374395s. I0425 20:34:00.659635 135157176592128 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0425 20:34:00.659786 135157176592128 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0425 20:34:00.659835 135157176592128 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=5] CheckpointManager Save Finalize is syncing with other hosts... I0425 20:34:00.661924 135157176592128 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=5] CheckpointManager Save Finalize is done on all hosts. I0425 20:34:00.662099 135310452000576 checkpoint_manager.py:2032] [process=5][thread=MainThread][step=5][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=5. W0425 20:34:00.662221 135310452000576 checkpoint_manager.py:1452] Waiting for previous save to complete took 28.190097 seconds. If this number is high, consider checkpointing less frequently. I0425 20:34:00.663644 135310452000576 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 9 I0425 20:34:00.665728 135310452000576 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_08_checkpoint_async_true/checkpoints/9. I0425 20:34:01.364865 135310452000576 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0425 20:34:01.364959 135310452000576 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 20:34:01.400889 135310452000576 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.036865s I0425 20:34:01.401028 135310452000576 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 38.255 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.040323734283447266 s) (per-host) I0425 20:34:01.401077 135310452000576 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.040382s (batch_requests_ready=0.001651s, total_serialization_initiated=0.038668s, others=0.000063s) I0425 20:34:01.401158 135310452000576 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.044518s (all_items=0.000010s, per_item={'items': '0.00001049'}, temp_paths=0.044507) I0425 20:34:01.401821 135310452000576 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.74 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_08_checkpoint_async_true/checkpoints/9. I0425 20:34:01.402150 135157176592128 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-25 20:54:01.402114 I0425 20:34:01.404282 135310452000576 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0425 20:34:01.404557 135181792139008 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0425 20:34:01.404726 135310452000576 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_08_checkpoint_async_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777149212.4720998, 'wait_for_prev_duration_secs': 28.190096616744995, 'time_between_consecutive_saves_sec': 23.529865980148315, 'checkpointer_blocking_start_time': 1777149240.6636977, 'checkpointer_blocking_duration_secs': 0.7386016845703125, 'get_old_steps_start_time': 1777149241.402316, 'get_old_steps_duration_secs': 2.6226043701171875e-05, 'checkpoint_manager_blocking_start_time': 1777149212.4703116, 'checkpoint_manager_blocking_duration_secs': 28.934382438659668} I0425 20:34:01.404842 135310452000576 checkpointing.py:408] Started an asynchronous checkpoint save for step 9 I0425 20:34:01.404888 135310452000576 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0425 20:34:06.494635 135182342416128 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_08_checkpoint_async_true/checkpoints/9/items/array_metadatas/process_5 I0425 20:34:42.374030 135157176592128 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 38.514 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.013275146484375 s) (per-host) I0425 20:34:42.374158 135157176592128 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 40.971893s. I0425 20:34:50.657258 135157176592128 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 49.254976s. I0425 20:34:50.657545 135181792139008 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0425 20:34:50.657692 135181792139008 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0425 20:34:50.657736 135181792139008 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0425 20:34:50.659760 135181792139008 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0425 20:34:50.659928 135310452000576 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. I0425 20:34:50.660074 135310452000576 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0425 20:34:50.660956 135310452000576 metric_logger.py:196] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.232, Tokens/s/device: 13902.182, total_weights: 65536, loss: 7.181, lm_loss: 7.181, perplexity: 1314.495 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Sat Apr 25 20:35:03 UTC 2026 EXIT_CODE=0