XPK Start: Thu Apr 23 22:05:52 UTC 2026 PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used. `rope_parameters`'s factor field must be a float >= 1, got 40 `rope_parameters`'s beta_fast field must be a float, got 32 `rope_parameters`'s beta_slow field must be a float, got 1 DeepseekV32Config got `key=rope_scaling` in kwargs but hasn't set it as attribute. For RoPE standardization you need to set `self.rope_parameters` in model's config. 2026-04-23 22:06:17.203361: E external/local_xla/xla/stream_executor/cuda/cuda_platform.cc:51] failed call to cuInit: INTERNAL: CUDA error: Failed call to cuInit: UNKNOWN ERROR (303) I0423 22:06:17.414202 139103955990336 max_utils.py:273] Attempting to initialize the jax distributed system... I0423 22:06:26.456769 139103955990336 distributed.py:149] Starting JAX distributed service on [::]:8482 I0423 22:06:26.459308 139103955990336 distributed.py:172] Connecting to JAX distributed service on mt-14-async-ckpt-false--9sott-slice-job-0-0.mt-14-async-ckpt-false--9sott:8482 I0423 22:06:27.398421 139103955990336 max_utils.py:284] Jax distributed system initialized! I0423 22:06:33.491688 139103955990336 max_utils.py:800] System Information: Jax Version: 0.9.2 I0423 22:06:33.491790 139103955990336 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0423 22:06:33.491830 139103955990336 max_utils.py:802] System Information: Jax Backend: PJRT C API TFRT TPU v6 lite Built on Mar 4 2026 11:32:08 (1772652728) cl/878335365 I0423 22:06:33.491865 139103955990336 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0423 22:06:34.189180 139103955990336 maxtext_utils.py:1565] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0423 22:06:34.189463 139103955990336 checkpointing.py:677] Setting up checkpoint logger... I0423 22:06:34.189523 139103955990336 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True I0423 22:06:34.189567 139103955990336 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0423 22:06:34.189914 139103955990336 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 0x7e8310719ac0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0423 22:06:35.940471 139103955990336 checkpointing.py:265] Enabling policy for fixed interval checkpointing. I0423 22:06:35.940709 139103955990336 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 0x7e6e9c17b860>}, handler_registry=None I0423 22:06:35.940947 139103955990336 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e6e9c17b860>` for item "items" and save args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>` to `_handler_registry`. I0423 22:06:35.940996 139103955990336 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e6e9c17b440>` for item "metrics" and save args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>` to `_handler_registry`. I0423 22:06:35.941033 139103955990336 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 0x7e6e9c17b860>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e6e9c17b860>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e6e9c17b440>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e6e9c17b440>}). I0423 22:06:35.941376 139103955990336 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0423 22:06:37.399827 138981626857216 checkpoint.py:228] Read Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776981753364256141, 'commit_timestamp_nsecs': 1776981802106878877, 'custom_metadata': {}} from gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_14_async_ckpt_false/checkpoints/5/_CHECKPOINT_METADATA I0423 22:06:37.653637 138981626857216 checkpoint_manager.py:1871] Missing metrics for step 5 I0423 22:06:37.687071 139103955990336 checkpoint_manager.py:1812] Found 3 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_14_async_ckpt_false/checkpoints I0423 22:06:38.504223 139103955990336 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=False, 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_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_14_async_ckpt_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7e6e9c179ca0> I0423 22:06:38.504398 139103955990336 checkpointing.py:301] Checkpoint manager created! I0423 22:06:39.438559 139103955990336 nnx_wrappers.py:453] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0423 22:06:39.438671 139103955990336 nnx_wrappers.py:453] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 22:06:39.819510 139103955990336 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 22:06:39.819601 139103955990336 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 22:06:39.836067 139103955990336 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 22:06:39.836140 139103955990336 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 22:06:39.859658 139103955990336 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 22:06:39.859726 139103955990336 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 22:06:39.876385 139103955990336 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 22:06:39.876456 139103955990336 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 22:06:39.893012 139103955990336 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 22:06:39.893074 139103955990336 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 22:06:39.918015 139103955990336 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0423 22:06:39.918103 139103955990336 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 22:06:39.940155 139103955990336 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0423 22:06:39.940223 139103955990336 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0423 22:06:40.150250 139103955990336 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint I0423 22:06:40.150357 139103955990336 checkpointing.py:581] restoring from this run's directory step 9 I0423 22:06:40.399955 139103955990336 event_tracking.py:70] [process=6] [sync] Started load checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_14_async_ckpt_false/checkpoints/9. I0423 22:06:40.649910 139103955990336 checkpointer.py:307] Restoring checkpoint from gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_14_async_ckpt_false/checkpoints/9. I0423 22:06:40.650370 139103955990336 event_tracking.py:125] [process=6] [sync] Finished blocking load in 0.25 seconds. Continuing load @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_14_async_ckpt_false/checkpoints/9. I0423 22:06:42.918521 1464 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0423 22:06:49.166614 139103955990336 jax_array_handlers.py:843] [process=6] /jax/orbax/read/worker/io/requested throughput: 252.671 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 6.254283666610718 s) (per-host) I0423 22:06:49.171997 139103955990336 base_pytree_checkpoint_handler.py:130] [process=6] /jax/checkpoint/read/gbytes_per_sec: 237.647 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 6.65942907333374 s) (per-host) I0423 22:06:50.007085 139103955990336 event_tracking.py:138] [process=6] [sync] Finished load in 9.61 seconds @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_14_async_ckpt_false/checkpoints/9 I0423 22:06:50.007279 139103955990336 standard_logger.py:34] {'step': 9, 'event_type': 'restore', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_14_async_ckpt_false/checkpoints', 'checkpointer_start_time': 1776982000.3998744, 'checkpointer_duration_secs': 9.607370853424072, 'checkpoint_manager_start_time': 1776982000.1506064, 'checkpoint_manager_duration_secs': 9.85664176940918} fsdp: 32 I0423 22:06:50.427460 139103955990336 maxtext_utils.py:1668] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0423 22:06:50.427593 139103955990336 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) I0423 22:06:50.427646 139103955990336 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) I0423 22:06:50.427703 139103955990336 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') I0423 22:06:50.427755 139103955990336 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) I0423 22:06:50.427794 139103955990336 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) I0423 22:06:50.427850 139103955990336 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) I0423 22:06:50.427902 139103955990336 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') I0423 22:06:50.427941 139103955990336 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) I0423 22:06:50.427977 139103955990336 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) I0423 22:06:50.428022 139103955990336 maxtext_utils.py:1668] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', None) I0423 22:06:50.428066 139103955990336 maxtext_utils.py:1668] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0423 22:06:50.927456 139103955990336 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0423 22:06:50.927561 139103955990336 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0423 22:06:50.943148 139103955990336 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0423 22:06:50.943205 139103955990336 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0423 22:07:01.696999 139103955990336 max_utils.py:791] Total memory size: 1.5 GB, Output size: 0.4 GB, Temp size: 1.1 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB. I0423 22:07:01.697790 139103955990336 metric_logger.py:301] number parameters: 1.104 billion I0423 22:07:13.305645 139103955990336 checkpointing.py:772] Waiting for step 10 to finish before checkpoint... I0423 22:07:13.541426 139103955990336 checkpointing.py:776] Waited 0.23575949668884277 seconds for step 10 to finish before starting checkpointing. I0423 22:07:13.543731 139103955990336 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 22:07:13.545594 139103955990336 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 10 I0423 22:07:13.547185 139103955990336 event_tracking.py:70] [process=6] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_14_async_ckpt_false/checkpoints/10. I0423 22:07:17.241999 139103955990336 signaling_client.py:364] Using JaxDistributedSignalingClient I0423 22:07:17.243648 139103955990336 future.py:372] [process=6][thread=MainThread][operation_id=1] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture. I0423 22:07:18.645027 139103955990336 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0423 22:07:18.646926 139103955990336 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False I0423 22:07:18.923292 139103955990336 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.279499s I0423 22:07:18.923480 139103955990336 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 5.438 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2836885452270508 s) (per-host) I0423 22:07:18.923557 139103955990336 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.283776s (batch_requests_ready=0.002435s, total_serialization_initiated=0.281245s, others=0.000097s) I0423 22:07:18.923680 139103955990336 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.681763s (all_items=0.000036s, per_item={'items': '0.00003552'}, temp_paths=1.681728) I0423 22:07:18.923745 139103955990336 future.py:372] [process=6][thread=MainThread][operation_id=1] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture. I0423 22:07:18.923797 139103955990336 future.py:372] [process=6][thread=MainThread][operation_id=1] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture. I0423 22:07:21.934085 138981048055552 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_14_async_ckpt_false/checkpoints/10/items/array_metadatas/process_6 I0423 22:07:57.983090 139103955990336 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 40.149 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 39.34326696395874 s) (per-host) I0423 22:08:01.974247 139103955990336 event_tracking.py:125] [process=6] [sync] Finished blocking save in 48.43 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_14_async_ckpt_false/checkpoints/10. I0423 22:08:06.076986 139103955990336 event_tracking.py:138] [process=6] [sync] Finished save in 52.53 seconds @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_14_async_ckpt_false/checkpoints/10 I0423 22:08:06.079901 139103955990336 checkpoint_manager.py:2137] [process=6][thread=MainThread][step=10] CheckpointManager Save Finalize is syncing with other hosts... I0423 22:08:06.081419 139103955990336 checkpoint_manager.py:2146] [process=6][thread=MainThread][step=10] CheckpointManager Save Finalize is done on all hosts. I0423 22:08:06.081471 139103955990336 checkpoint_manager.py:1581] [process=6][thread=MainThread][step=10] Finished synchronous save. I0423 22:08:06.081525 139103955990336 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1776982033.5437133, 'wait_for_prev_duration_secs': 6.222724914550781e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776982033.5456333, 'checkpointer_blocking_duration_secs': 52.53149676322937, 'get_old_steps_start_time': 1776982086.0771573, 'get_old_steps_duration_secs': 3.361701965332031e-05, 'checkpoint_manager_blocking_start_time': 1776982033.5417988, 'checkpoint_manager_blocking_duration_secs': 52.53969764709473} I0423 22:08:06.081626 139103955990336 checkpointing.py:410] Saved a checkpoint at step 10. I0423 22:08:06.081689 139103955990336 max_utils.py:750] Memstats: After params initialized: I0423 22:08:06.081756 139103955990336 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0)) I0423 22:08:06.081802 139103955990336 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0)) I0423 22:08:06.081835 139103955990336 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0)) I0423 22:08:06.081866 139103955990336 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0)) I0423 22:08:06.410187 139103955990336 metric_logger.py:196] completed step: 10, seconds: 11.608, TFLOP/s/device: 1.171, Tokens/s/device: 176.434, total_weights: 65536, loss: 6.833, lm_loss: 6.833, perplexity: 927.869 I0423 22:08:06.569324 139103955990336 metric_logger.py:196] completed step: 11, seconds: 53.086, TFLOP/s/device: 0.256, Tokens/s/device: 38.579, total_weights: 65536, loss: 6.527, lm_loss: 6.527, perplexity: 683.659 I0423 22:08:06.716682 139103955990336 metric_logger.py:196] completed step: 12, seconds: 0.029, TFLOP/s/device: 476.591, Tokens/s/device: 71836.964, total_weights: 65536, loss: 6.265, lm_loss: 6.265, perplexity: 526.068 I0423 22:08:06.864088 139103955990336 metric_logger.py:196] completed step: 13, seconds: 0.153, TFLOP/s/device: 88.607, Tokens/s/device: 13355.854, total_weights: 65536, loss: 6.045, lm_loss: 6.045, perplexity: 422.001 I0423 22:08:06.868435 139103955990336 checkpointing.py:772] Waiting for step 15 to finish before checkpoint... I0423 22:08:07.158168 139103955990336 checkpointing.py:776] Waited 0.2896616458892822 seconds for step 15 to finish before starting checkpointing. I0423 22:08:07.161149 139103955990336 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 22:08:07.162638 139103955990336 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 15 I0423 22:08:07.164438 139103955990336 event_tracking.py:70] [process=6] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_14_async_ckpt_false/checkpoints/15. I0423 22:08:10.112024 139103955990336 future.py:372] [process=6][thread=MainThread][operation_id=2] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture. I0423 22:08:11.894210 139103955990336 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0423 22:08:11.894314 139103955990336 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False I0423 22:08:11.938762 139103955990336 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.045754s I0423 22:08:11.938936 139103955990336 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 31.160 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.049504756927490234 s) (per-host) I0423 22:08:11.938994 139103955990336 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.049572s (batch_requests_ready=0.001883s, total_serialization_initiated=0.047616s, others=0.000074s) I0423 22:08:11.939108 139103955990336 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.828330s (all_items=0.000024s, per_item={'items': '0.00002432'}, temp_paths=1.828306) I0423 22:08:11.939154 139103955990336 future.py:372] [process=6][thread=MainThread][operation_id=2] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture. I0423 22:08:11.939193 139103955990336 future.py:372] [process=6][thread=MainThread][operation_id=2] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture. I0423 22:08:14.814898 138981048055552 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_14_async_ckpt_false/checkpoints/15/items/array_metadatas/process_6 I0423 22:08:51.165821 139103955990336 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 40.217 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 39.27635335922241 s) (per-host) I0423 22:08:57.906473 139103955990336 event_tracking.py:125] [process=6] [sync] Finished blocking save in 50.74 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_14_async_ckpt_false/checkpoints/15. I0423 22:09:01.941425 139103955990336 event_tracking.py:138] [process=6] [sync] Finished save in 54.78 seconds @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_14_async_ckpt_false/checkpoints/15 I0423 22:09:01.943903 139103955990336 checkpoint_manager.py:2137] [process=6][thread=MainThread][step=15] CheckpointManager Save Finalize is syncing with other hosts... I0423 22:09:01.945388 139103955990336 checkpoint_manager.py:2146] [process=6][thread=MainThread][step=15] CheckpointManager Save Finalize is done on all hosts. I0423 22:09:01.945439 139103955990336 checkpoint_manager.py:1581] [process=6][thread=MainThread][step=15] Finished synchronous save. I0423 22:09:01.945491 139103955990336 standard_logger.py:34] {'step': 15, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1776982087.161129, 'wait_for_prev_duration_secs': 5.936622619628906e-05, 'time_between_consecutive_saves_sec': 1.0796687602996826, 'checkpointer_blocking_start_time': 1776982087.1626785, 'checkpointer_blocking_duration_secs': 54.77886247634888, 'get_old_steps_start_time': 1776982141.9415605, 'get_old_steps_duration_secs': 2.47955322265625e-05, 'checkpoint_manager_blocking_start_time': 1776982087.1587594, 'checkpoint_manager_blocking_duration_secs': 54.78670692443848} I0423 22:09:01.945579 139103955990336 checkpointing.py:410] Saved a checkpoint at step 15. I0423 22:09:01.946422 139103955990336 metric_logger.py:196] completed step: 14, seconds: 0.148, TFLOP/s/device: 92.077, Tokens/s/device: 13878.912, total_weights: 65536, loss: 5.864, lm_loss: 5.864, perplexity: 352.193 I0423 22:09:01.970143 139103955990336 metric_logger.py:196] completed step: 15, seconds: 0.147, TFLOP/s/device: 92.475, Tokens/s/device: 13938.895, total_weights: 65536, loss: 5.719, lm_loss: 5.719, perplexity: 304.661 I0423 22:09:22.915734 139103955990336 metric_logger.py:196] completed step: 16, seconds: 55.083, TFLOP/s/device: 0.247, Tokens/s/device: 37.181, total_weights: 65536, loss: 5.605, lm_loss: 5.605, perplexity: 271.872 I0423 22:09:23.063159 139103955990336 metric_logger.py:196] completed step: 17, seconds: 20.817, TFLOP/s/device: 0.653, Tokens/s/device: 98.381, total_weights: 65536, loss: 5.517, lm_loss: 5.517, perplexity: 248.975 I0423 22:09:23.210777 139103955990336 metric_logger.py:196] completed step: 18, seconds: 0.152, TFLOP/s/device: 89.136, Tokens/s/device: 13435.587, total_weights: 65536, loss: 5.448, lm_loss: 5.448, perplexity: 232.333 I0423 22:09:23.357431 139103955990336 checkpointing.py:772] Waiting for step 19 to finish before checkpoint... I0423 22:09:23.358125 139103955990336 checkpointing.py:776] Waited 0.0006947517395019531 seconds for step 19 to finish before starting checkpointing. I0423 22:09:23.360279 139103955990336 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 22:09:23.362119 139103955990336 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 19 I0423 22:09:23.363609 139103955990336 event_tracking.py:70] [process=6] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_14_async_ckpt_false/checkpoints/19. I0423 22:09:26.293978 139103955990336 future.py:372] [process=6][thread=MainThread][operation_id=3] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture. I0423 22:09:27.722017 139103955990336 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0423 22:09:27.722131 139103955990336 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False I0423 22:09:27.769158 139103955990336 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.048338s I0423 22:09:27.769343 139103955990336 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 29.585 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.05214095115661621 s) (per-host) I0423 22:09:27.769400 139103955990336 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.052208s (batch_requests_ready=0.001882s, total_serialization_initiated=0.050255s, others=0.000072s) I0423 22:09:27.769502 139103955990336 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.476857s (all_items=0.000025s, per_item={'items': '0.00002456'}, temp_paths=1.476833) I0423 22:09:27.769542 139103955990336 future.py:372] [process=6][thread=MainThread][operation_id=3] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture. I0423 22:09:27.769582 139103955990336 future.py:372] [process=6][thread=MainThread][operation_id=3] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture. I0423 22:09:29.848410 139020546422528 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_14_async_ckpt_false/checkpoints/19/items/array_metadatas/process_6 I0423 22:10:07.577880 139103955990336 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 39.628 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 39.860642194747925 s) (per-host) I0423 22:10:09.292826 139103955990336 event_tracking.py:125] [process=6] [sync] Finished blocking save in 45.93 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_14_async_ckpt_false/checkpoints/19. I0423 22:10:13.547871 139103955990336 event_tracking.py:138] [process=6] [sync] Finished save in 50.19 seconds @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_14_async_ckpt_false/checkpoints/19 I0423 22:10:13.549907 139103955990336 checkpoint_manager.py:2137] [process=6][thread=MainThread][step=19] CheckpointManager Save Finalize is syncing with other hosts... I0423 22:10:13.551643 139103955990336 checkpoint_manager.py:2146] [process=6][thread=MainThread][step=19] CheckpointManager Save Finalize is done on all hosts. I0423 22:10:13.551692 139103955990336 checkpoint_manager.py:1581] [process=6][thread=MainThread][step=19] Finished synchronous save. I0423 22:10:13.551738 139103955990336 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1776982163.3602633, 'wait_for_prev_duration_secs': 5.53131103515625e-05, 'time_between_consecutive_saves_sec': 21.41483497619629, 'checkpointer_blocking_start_time': 1776982163.3621566, 'checkpointer_blocking_duration_secs': 50.18583035469055, 'get_old_steps_start_time': 1776982213.548, 'get_old_steps_duration_secs': 2.0265579223632812e-05, 'checkpoint_manager_blocking_start_time': 1776982163.358362, 'checkpoint_manager_blocking_duration_secs': 50.193355083465576} I0423 22:10:13.551820 139103955990336 checkpointing.py:410] Saved a checkpoint at step 19. I0423 22:10:13.551850 139103955990336 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 22:10:13.551878 139103955990336 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 22:10:13.552531 139103955990336 metric_logger.py:196] completed step: 19, seconds: 0.147, TFLOP/s/device: 92.245, Tokens/s/device: 13904.164, total_weights: 65536, loss: 5.391, lm_loss: 5.391, perplexity: 219.349 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Thu Apr 23 22:10:22 UTC 2026 EXIT_CODE=0