XPK Start: Sat Apr 25 20:53:51 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 20:54:16.546484: 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 20:54:16.759685 134508583069504 max_utils.py:273] Attempting to initialize the jax distributed system... I0425 20:54:25.800064 134508583069504 distributed.py:149] Starting JAX distributed service on [::]:8482 I0425 20:54:25.802499 134508583069504 distributed.py:172] Connecting to JAX distributed service on mt-14-async-ckpt-false--ilbcd-slice-job-0-0.mt-14-async-ckpt-false--ilbcd:8482 I0425 20:54:26.900027 134508583069504 max_utils.py:284] Jax distributed system initialized! I0425 20:54:32.833897 134508583069504 max_utils.py:800] System Information: Jax Version: 0.9.2 I0425 20:54:32.834004 134508583069504 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0425 20:54:32.834045 134508583069504 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 20:54:32.834081 134508583069504 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0425 20:54:33.531116 134508583069504 maxtext_utils.py:1565] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0425 20:54:33.531404 134508583069504 checkpointing.py:677] Setting up checkpoint logger... I0425 20:54:33.531461 134508583069504 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True I0425 20:54:33.531506 134508583069504 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0425 20:54:33.531858 134508583069504 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 0x7a5536787dd0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0425 20:54:36.694280 134508583069504 checkpointing.py:265] Enabling policy for fixed interval checkpointing. I0425 20:54:36.694521 134508583069504 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 0x7a40e02d6ea0>}, handler_registry=None I0425 20:54:36.694769 134508583069504 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7a40e02d6ea0>` 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 20:54:36.694820 134508583069504 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a40e02d9460>` 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 20:54:36.694857 134508583069504 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 0x7a40e02d6ea0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7a40e02d6ea0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a40e02d9460>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a40e02d9460>}). I0425 20:54:36.695199 134508583069504 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0425 20:54:37.641053 134508583069504 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_14_async_ckpt_false/checkpoints I0425 20:54:37.643413 134508583069504 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_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7a40e02d70b0> I0425 20:54:37.643532 134508583069504 checkpointing.py:301] Checkpoint manager created! I0425 20:54:38.575160 134508583069504 nnx_wrappers.py:453] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0425 20:54:38.575275 134508583069504 nnx_wrappers.py:453] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0425 20:54:38.952492 134508583069504 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0425 20:54:38.952581 134508583069504 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0425 20:54:38.969796 134508583069504 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0425 20:54:38.969858 134508583069504 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0425 20:54:38.993942 134508583069504 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 20:54:38.994010 134508583069504 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 20:54:39.011104 134508583069504 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 20:54:39.011165 134508583069504 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 20:54:39.027953 134508583069504 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 20:54:39.028014 134508583069504 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 20:54:39.053353 134508583069504 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0425 20:54:39.053427 134508583069504 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 20:54:39.074892 134508583069504 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0425 20:54:39.074956 134508583069504 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0425 20:54:39.288346 134508583069504 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint I0425 20:54:39.288455 134508583069504 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0425 20:54:40.721957 134508583069504 maxtext_utils.py:1668] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0425 20:54:40.722084 134508583069504 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 20:54:40.722153 134508583069504 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 20:54:40.722213 134508583069504 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 20:54:40.722291 134508583069504 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 20:54:40.722338 134508583069504 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 20:54:40.722395 134508583069504 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 20:54:40.722449 134508583069504 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 20:54:40.722489 134508583069504 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 20:54:40.722526 134508583069504 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 20:54:40.722573 134508583069504 maxtext_utils.py:1668] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', None) I0425 20:54:40.722623 134508583069504 maxtext_utils.py:1668] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0425 20:54:41.216943 134508583069504 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0425 20:54:41.217043 134508583069504 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0425 20:54:41.232862 134508583069504 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0425 20:54:41.232923 134508583069504 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0425 20:54:52.256596 134508583069504 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 20:54:52.257413 134508583069504 metric_logger.py:301] number parameters: 1.104 billion I0425 20:55:04.096032 134508583069504 checkpointing.py:772] Waiting for step 0 to finish before checkpoint... I0425 20:55:04.251846 134508583069504 checkpointing.py:776] Waited 0.1557917594909668 seconds for step 0 to finish before starting checkpointing. I0425 20:55:04.254295 134508583069504 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0425 20:55:04.255969 134508583069504 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 0 I0425 20:55:04.257463 134508583069504 event_tracking.py:70] [process=6] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/0. I0425 20:55:07.647384 134508583069504 signaling_client.py:364] Using JaxDistributedSignalingClient I0425 20:55:07.648661 134508583069504 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. I0425 20:55:09.049998 134508583069504 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0425 20:55:09.050112 134508583069504 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 20:55:09.328736 134508583069504 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.279774s I0425 20:55:09.328923 134508583069504 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 5.396 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28586769104003906 s) (per-host) I0425 20:55:09.328981 134508583069504 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.285935s (batch_requests_ready=0.002557s, total_serialization_initiated=0.283303s, others=0.000075s) I0425 20:55:09.329081 134508583069504 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.681786s (all_items=0.000035s, per_item={'items': '0.00003529'}, temp_paths=1.681751) I0425 20:55:09.329157 134508583069504 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. I0425 20:55:09.329200 134508583069504 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. I0425 20:55:09.342216 2773 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0425 20:55:11.364511 134379780626176 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_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/0/items/array_metadatas/process_6 I0425 20:55:42.788719 134508583069504 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 46.809 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 33.745622634887695 s) (per-host) I0425 20:55:48.226718 134508583069504 event_tracking.py:125] [process=6] [sync] Finished blocking save in 43.97 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/0. I0425 20:55:52.358456 134508583069504 event_tracking.py:138] [process=6] [sync] Finished save in 48.10 seconds @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/0 I0425 20:55:52.360631 134508583069504 checkpoint_manager.py:2137] [process=6][thread=MainThread][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0425 20:55:52.362343 134508583069504 checkpoint_manager.py:2146] [process=6][thread=MainThread][step=0] CheckpointManager Save Finalize is done on all hosts. I0425 20:55:52.362394 134508583069504 checkpoint_manager.py:1581] [process=6][thread=MainThread][step=0] Finished synchronous save. I0425 20:55:52.362449 134508583069504 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_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1777150504.2542698, 'wait_for_prev_duration_secs': 8.893013000488281e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777150504.2560263, 'checkpointer_blocking_duration_secs': 48.102550983428955, 'get_old_steps_start_time': 1777150552.3586013, 'get_old_steps_duration_secs': 2.5272369384765625e-05, 'checkpoint_manager_blocking_start_time': 1777150504.25244, 'checkpoint_manager_blocking_duration_secs': 48.109981298446655} I0425 20:55:52.362542 134508583069504 checkpointing.py:410] Saved a checkpoint at step 0. I0425 20:55:52.362585 134508583069504 max_utils.py:750] Memstats: After params initialized: I0425 20:55:52.362631 134508583069504 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0)) I0425 20:55:52.362662 134508583069504 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0)) I0425 20:55:52.362689 134508583069504 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0)) I0425 20:55:52.362713 134508583069504 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0)) I0425 20:55:52.686215 134508583069504 metric_logger.py:196] completed step: 0, seconds: 11.839, TFLOP/s/device: 1.148, Tokens/s/device: 172.995, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875 I0425 20:55:52.849904 134508583069504 metric_logger.py:196] completed step: 1, seconds: 48.583, TFLOP/s/device: 0.280, Tokens/s/device: 42.155, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875 I0425 20:55:53.269640 134508583069504 metric_logger.py:196] completed step: 2, seconds: 0.022, TFLOP/s/device: 616.364, Tokens/s/device: 92905.099, total_weights: 65536, loss: 10.560, lm_loss: 10.560, perplexity: 38547.719 I0425 20:55:53.417200 134508583069504 metric_logger.py:196] completed step: 3, seconds: 0.420, TFLOP/s/device: 32.315, Tokens/s/device: 4870.821, total_weights: 65536, loss: 9.980, lm_loss: 9.980, perplexity: 21590.506 I0425 20:55:53.421576 134508583069504 checkpointing.py:772] Waiting for step 5 to finish before checkpoint... I0425 20:55:53.711217 134508583069504 checkpointing.py:776] Waited 0.2896091938018799 seconds for step 5 to finish before starting checkpointing. I0425 20:55:53.714174 134508583069504 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0425 20:55:53.715837 134508583069504 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 5 I0425 20:55:53.717759 134508583069504 event_tracking.py:70] [process=6] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/5. I0425 20:55:56.549303 134508583069504 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. I0425 20:55:58.244065 134508583069504 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0425 20:55:58.244183 134508583069504 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 20:55:58.287620 134508583069504 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.044984s I0425 20:55:58.287773 134508583069504 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 31.581 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.048844337463378906 s) (per-host) I0425 20:55:58.287828 134508583069504 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.048907s (batch_requests_ready=0.002091s, total_serialization_initiated=0.046748s, others=0.000068s) I0425 20:55:58.287928 134508583069504 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.739851s (all_items=0.000032s, per_item={'items': '0.00003171'}, temp_paths=1.739820) I0425 20:55:58.287971 134508583069504 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. I0425 20:55:58.288009 134508583069504 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. I0425 20:56:00.789454 134379250640640 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_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/5/items/array_metadatas/process_6 I0425 20:56:36.467853 134508583069504 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 41.319 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 38.228859663009644 s) (per-host) I0425 20:56:41.783587 134508583069504 event_tracking.py:125] [process=6] [sync] Finished blocking save in 48.07 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/5. I0425 20:56:45.892178 134508583069504 event_tracking.py:138] [process=6] [sync] Finished save in 52.18 seconds @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/5 I0425 20:56:45.894066 134508583069504 checkpoint_manager.py:2137] [process=6][thread=MainThread][step=5] CheckpointManager Save Finalize is syncing with other hosts... I0425 20:56:45.895750 134508583069504 checkpoint_manager.py:2146] [process=6][thread=MainThread][step=5] CheckpointManager Save Finalize is done on all hosts. I0425 20:56:45.895801 134508583069504 checkpoint_manager.py:1581] [process=6][thread=MainThread][step=5] Finished synchronous save. I0425 20:56:45.895853 134508583069504 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_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1777150553.7141519, 'wait_for_prev_duration_secs': 6.318092346191406e-05, 'time_between_consecutive_saves_sec': 1.351768970489502, 'checkpointer_blocking_start_time': 1777150553.7158756, 'checkpointer_blocking_duration_secs': 52.17642092704773, 'get_old_steps_start_time': 1777150605.892316, 'get_old_steps_duration_secs': 3.314018249511719e-05, 'checkpoint_manager_blocking_start_time': 1777150553.7118366, 'checkpoint_manager_blocking_duration_secs': 52.1839919090271} I0425 20:56:45.895943 134508583069504 checkpointing.py:410] Saved a checkpoint at step 5. I0425 20:56:45.896731 134508583069504 metric_logger.py:196] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.886, Tokens/s/device: 13397.793, total_weights: 65536, loss: 9.460, lm_loss: 9.460, perplexity: 12840.355 I0425 20:56:45.911351 134508583069504 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.172, Tokens/s/device: 13893.223, total_weights: 65536, loss: 8.959, lm_loss: 8.959, perplexity: 7776.467 I0425 20:57:09.256076 134508583069504 metric_logger.py:196] completed step: 6, seconds: 52.479, TFLOP/s/device: 0.259, Tokens/s/device: 39.025, total_weights: 65536, loss: 8.469, lm_loss: 8.469, perplexity: 4762.740 I0425 20:57:09.403325 134508583069504 metric_logger.py:196] completed step: 7, seconds: 23.207, TFLOP/s/device: 0.585, Tokens/s/device: 88.248, total_weights: 65536, loss: 8.003, lm_loss: 8.003, perplexity: 2989.151 I0425 20:57:09.550856 134508583069504 metric_logger.py:196] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.270, Tokens/s/device: 13455.714, total_weights: 65536, loss: 7.572, lm_loss: 7.572, perplexity: 1943.098 I0425 20:57:09.697547 134508583069504 checkpointing.py:772] Waiting for step 9 to finish before checkpoint... I0425 20:57:09.698243 134508583069504 checkpointing.py:776] Waited 0.0007176399230957031 seconds for step 9 to finish before starting checkpointing. I0425 20:57:09.700247 134508583069504 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0425 20:57:09.701997 134508583069504 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 9 I0425 20:57:09.703388 134508583069504 event_tracking.py:70] [process=6] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/9. I0425 20:57:12.975285 134508583069504 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. I0425 20:57:14.426252 134508583069504 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0425 20:57:14.426352 134508583069504 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 20:57:14.466628 134508583069504 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.041562s I0425 20:57:14.466807 134508583069504 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 33.906 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.045496225357055664 s) (per-host) I0425 20:57:14.466860 134508583069504 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.045561s (batch_requests_ready=0.002034s, total_serialization_initiated=0.043457s, others=0.000070s) I0425 20:57:14.466965 134508583069504 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.493044s (all_items=0.000023s, per_item={'items': '0.00002289'}, temp_paths=1.493021) I0425 20:57:14.467009 134508583069504 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. I0425 20:57:14.467045 134508583069504 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. I0425 20:57:16.503746 134379795904256 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_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/9/items/array_metadatas/process_6 I0425 20:57:52.704715 134508583069504 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 41.261 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 38.28338646888733 s) (per-host) I0425 20:57:58.348961 134508583069504 event_tracking.py:125] [process=6] [sync] Finished blocking save in 48.65 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/9. I0425 20:58:02.601237 134508583069504 event_tracking.py:138] [process=6] [sync] Finished save in 52.90 seconds @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/9 I0425 20:58:02.603214 134508583069504 checkpoint_manager.py:2137] [process=6][thread=MainThread][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0425 20:58:02.604467 134508583069504 checkpoint_manager.py:2146] [process=6][thread=MainThread][step=9] CheckpointManager Save Finalize is done on all hosts. I0425 20:58:02.604519 134508583069504 checkpoint_manager.py:1581] [process=6][thread=MainThread][step=9] Finished synchronous save. I0425 20:58:02.604572 134508583069504 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_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1777150629.7002296, 'wait_for_prev_duration_secs': 5.841255187988281e-05, 'time_between_consecutive_saves_sec': 23.804439544677734, 'checkpointer_blocking_start_time': 1777150629.702035, 'checkpointer_blocking_duration_secs': 52.89935255050659, 'get_old_steps_start_time': 1777150682.6014066, 'get_old_steps_duration_secs': 2.6226043701171875e-05, 'checkpoint_manager_blocking_start_time': 1777150629.6984668, 'checkpoint_manager_blocking_duration_secs': 52.90608024597168} I0425 20:58:02.604670 134508583069504 checkpointing.py:410] Saved a checkpoint at step 9. I0425 20:58:02.604719 134508583069504 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0425 20:58:02.604765 134508583069504 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0425 20:58:02.605645 134508583069504 metric_logger.py:196] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.195, Tokens/s/device: 13896.617, 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 20:58:11 UTC 2026 EXIT_CODE=0