XPK Start: Sat Apr 25 18:11:04 UTC 2026 2026-04-25 18:11:08.824176: E external/local_xla/xla/stream_executor/cuda/cuda_fft.cc:467] Unable to register cuFFT factory: Attempting to register factory for plugin cuFFT when one has already been registered WARNING: All log messages before absl::InitializeLog() is called are written to STDERR E0000 00:00:1777140668.837084 10 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered E0000 00:00:1777140668.840838 10 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered W0000 00:00:1777140668.852565 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1777140668.852583 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1777140668.852586 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1777140668.852588 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. 2026-04-25 18:11:28.006522: 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 18:11:28.521991 136328432793408 max_utils.py:273] Attempting to initialize the jax distributed system... INFO:2026-04-25 18:11:37,564:jax._src.distributed:140: Starting JAX distributed service on [::]:8482 I0425 18:11:37.564607 136328432793408 distributed.py:140] Starting JAX distributed service on [::]:8482 INFO:2026-04-25 18:11:37,566:jax._src.distributed:157: Connecting to JAX distributed service on mt-04-int8-x4xd8-slice-job-0-0.mt-04-int8-x4xd8:8482 I0425 18:11:37.566834 136328432793408 distributed.py:157] Connecting to JAX distributed service on mt-04-int8-x4xd8-slice-job-0-0.mt-04-int8-x4xd8:8482 I0425 18:11:38.621506 136328432793408 max_utils.py:284] Jax distributed system initialized! I0425 18:11:45.646522 136328432793408 max_utils.py:800] System Information: Jax Version: 0.8.1 I0425 18:11:45.646631 136328432793408 max_utils.py:801] System Information: Jaxlib Version: 0.8.1 I0425 18:11:45.646671 136328432793408 max_utils.py:802] System Information: Jax Backend: PJRT C API TFRT TPU v6 lite Built on Nov 12 2025 14:16:36 (1762985796) cl/831091709 I0425 18:11:45.646705 136328432793408 train_utils.py:347] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0425 18:11:46.264520 136328432793408 maxtext_utils.py:1517] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0425 18:11:46.264940 136328432793408 checkpointing.py:677] Setting up checkpoint logger... I0425 18:11:46.264998 136328432793408 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True I0425 18:11:46.265044 136328432793408 pytree_checkpoint_handler.py:589] save_device_host_concurrent_bytes=None I0425 18:11:46.265410 136328432793408 base_pytree_checkpoint_handler.py:415] 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 0x7bfce6774da0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0425 18:11:49.128985 136328432793408 checkpointing.py:265] Enabling policy for fixed interval checkpointing. I0425 18:11:49.129363 136328432793408 checkpoint_manager.py:709] [process=6][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7bfbaa96db20>}, handler_registry=None I0425 18:11:49.129605 136328432793408 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7bfbaa96db20>` 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 18:11:49.129654 136328432793408 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7be8541a73b0>` 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 18:11:49.129690 136328432793408 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 0x7bfbaa96db20>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7bfbaa96db20>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7be8541a73b0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7be8541a73b0>}). I0425 18:11:49.130225 136328432793408 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.33 I0425 18:11:49.130303 136328432793408 async_checkpointer.py:177] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7be85410aac0> timeout: 600 secs and primary_host=0 for async checkpoint writes I0425 18:11:51.963948 136328432793408 checkpoint_manager.py:1818] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260425_180433/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260425_180433_04_int8/checkpoints I0425 18:11:51.966908 136328432793408 checkpoint_manager.py:929] [process=6][thread=MainThread] CheckpointManager created, primary_host=0, CheckpointManagerOptions=CheckpointManagerOptions(save_interval_steps=1, max_to_keep=None, keep_time_interval=None, keep_period=None, should_keep_fn=None, best_fn=None, best_mode='max', keep_checkpoints_without_metrics=True, step_prefix=None, step_format_fixed_length=None, step_name_format=None, create=True, cleanup_tmp_directories=False, save_on_steps=frozenset(), single_host_load_and_broadcast=False, todelete_subdir=None, todelete_full_path=None, enable_background_delete=False, read_only=False, enable_async_checkpointing=True, async_options=None, multiprocessing_options=MultiprocessingOptions(primary_host=0, active_processes=None, barrier_sync_key_prefix=None), should_save_fn=None, file_options=FileOptions(path_permission_mode=None), save_root_metadata=True, temporary_path_class=None, save_decision_policy=FixedIntervalPolicy(interval=10), preservation_policy=LatestN(n=None), prevent_write_metrics=False, enable_should_save_is_saving_in_progress_check=True, enable_per_process_directory_creation=False, lightweight_initialize=False), root_directory=gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260425_180433/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260425_180433_04_int8/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7be8541a1880> I0425 18:11:51.967021 136328432793408 checkpointing.py:301] Checkpoint manager created! I0425 18:11:53.151298 136328432793408 nnx_wrappers.py:442] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0425 18:11:53.151409 136328432793408 nnx_wrappers.py:442] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0425 18:11:53.524302 136328432793408 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0425 18:11:53.524400 136328432793408 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0425 18:11:53.540305 136328432793408 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0425 18:11:53.540364 136328432793408 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0425 18:11:53.618634 136328432793408 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 18:11:53.618737 136328432793408 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 18:11:53.634839 136328432793408 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 18:11:53.634903 136328432793408 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 18:11:53.650830 136328432793408 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 18:11:53.650893 136328432793408 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 18:11:53.675386 136328432793408 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0425 18:11:53.675458 136328432793408 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 18:11:53.756484 136328432793408 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0425 18:11:53.756576 136328432793408 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0425 18:11:54.355860 136328432793408 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint I0425 18:11:54.355977 136328432793408 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0425 18:11:57.028488 136328432793408 maxtext_utils.py:1620] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: PartitionSpec('norm',) Physical: (None,) I0425 18:11:57.028624 136328432793408 maxtext_utils.py:1620] params/params/decoder/layers/mlp/wi_0/kernel Shape: float32[2048,16,7168] Logical: PartitionSpec('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0425 18:11:57.028678 136328432793408 maxtext_utils.py:1620] params/params/decoder/layers/mlp/wi_1/kernel Shape: float32[2048,16,7168] Logical: PartitionSpec('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0425 18:11:57.028736 136328432793408 maxtext_utils.py:1620] params/params/decoder/layers/mlp/wo/kernel Shape: float32[7168,16,2048] Logical: PartitionSpec('mlp', 'layers', 'embed') Physical: (None, None, 'fsdp') I0425 18:11:57.028789 136328432793408 maxtext_utils.py:1620] params/params/decoder/layers/post_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: PartitionSpec('norm', 'layers') Physical: (None, None) I0425 18:11:57.028828 136328432793408 maxtext_utils.py:1620] params/params/decoder/layers/pre_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: PartitionSpec('norm', 'layers') Physical: (None, None) I0425 18:11:57.028881 136328432793408 maxtext_utils.py:1620] params/params/decoder/layers/self_attention/key/kernel Shape: float32[2048,16,16,128] Logical: PartitionSpec('embed', 'layers', 'kv_heads', 'kv_head_dim') Physical: ('fsdp', None, None, None) I0425 18:11:57.028933 136328432793408 maxtext_utils.py:1620] params/params/decoder/layers/self_attention/out/kernel Shape: float32[16,16,128,2048] Logical: PartitionSpec('heads', 'layers', 'kv', 'embed') Physical: (None, None, None, 'fsdp') I0425 18:11:57.028973 136328432793408 maxtext_utils.py:1620] params/params/decoder/layers/self_attention/query/kernel Shape: float32[2048,16,16,128] Logical: PartitionSpec('embed', 'layers', 'q_heads', 'kv') Physical: ('fsdp', None, None, None) I0425 18:11:57.029009 136328432793408 maxtext_utils.py:1620] params/params/decoder/layers/self_attention/value/kernel Shape: float32[2048,16,16,128] Logical: PartitionSpec('embed', 'layers', 'kv_heads', 'kv_head_dim') Physical: ('fsdp', None, None, None) I0425 18:11:57.029056 136328432793408 maxtext_utils.py:1620] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: PartitionSpec('embed', 'vocab') Physical: ('fsdp', None) I0425 18:11:57.029127 136328432793408 maxtext_utils.py:1620] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: PartitionSpec('vocab', 'embed') Physical: (None, 'fsdp') I0425 18:11:58.741808 136328432793408 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0425 18:11:58.741912 136328432793408 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0425 18:11:58.756796 136328432793408 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0425 18:11:58.756856 136328432793408 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0425 18:12:12.816176 136328432793408 max_utils.py:791] Total memory size: 1.8 GB, Output size: 0.4 GB, Temp size: 1.4 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB. I0425 18:12:12.817058 136328432793408 metric_logger.py:289] number parameters: 1.104 billion I0425 18:12:28.438791 136328432793408 checkpointing.py:772] Waiting for step 0 to finish before checkpoint... I0425 18:12:28.680114 136328432793408 checkpointing.py:776] Waited 0.24128222465515137 seconds for step 0 to finish before starting checkpointing. I0425 18:12:28.682749 136328432793408 checkpoint_manager.py:2013] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0425 18:12:28.684352 136328432793408 checkpoint_manager.py:1518] [process=6] Saving checkpoint at step 0 I0425 18:12:28.687063 136328432793408 async_checkpointer.py:452] [process=6] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260425_180433/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260425_180433_04_int8/checkpoints/0. I0425 18:12:29.716378 136328432793408 signaling_client.py:364] Using JaxDistributedSignalingClient I0425 18:12:29.717335 136328432793408 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array. I0425 18:12:29.717393 136328432793408 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 18:12:29.964738 136328432793408 base_pytree_checkpoint_handler.py:153] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.248436s I0425 18:12:29.964915 136328432793408 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.996 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.514939546585083 s) (per-host) I0425 18:12:29.964969 136328432793408 base_pytree_checkpoint_handler.py:737] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.515004s (batch_requests_ready=0.262597s, total_serialization_initiated=0.252335s, others=0.000073s) I0425 18:12:29.965061 136328432793408 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.519222s (all_items=0.000021s, per_item={'items': '0.00002050'}, temp_paths=0.519201) I0425 18:12:29.965992 136205131826944 async_checkpointer.py:79] [process=6][thread=async_save] Background save thread started. I0425 18:12:29.966179 136328432793408 async_checkpointer.py:561] Finished blocking save. Time taken: 1.281756s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260425_180433/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260425_180433_04_int8/checkpoints/0. I0425 18:12:30.401154 136328432793408 checkpoint_manager.py:1566] [process=6][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0425 18:12:30.401596 136194419586816 async_checkpointer.py:265] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0425 18:12:30.401769 136328432793408 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260425_180433/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260425_180433_04_int8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777140748.68273, 'wait_for_prev_duration_secs': 6.556510925292969e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777140748.6843903, 'checkpointer_blocking_duration_secs': 1.2818999290466309, 'get_old_steps_start_time': 1777140749.9663112, 'get_old_steps_duration_secs': 3.24249267578125e-05, 'checkpoint_manager_blocking_start_time': 1777140748.6807666, 'checkpoint_manager_blocking_duration_secs': 1.7209603786468506} I0425 18:12:30.401880 136328432793408 checkpointing.py:408] Started an asynchronous checkpoint save for step 0 I0425 18:12:30.401932 136328432793408 max_utils.py:750] Memstats: After params initialized: I0425 18:12:30.401990 136328432793408 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0)) I0425 18:12:30.402022 136328432793408 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0)) I0425 18:12:30.402050 136328432793408 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0)) I0425 18:12:30.402076 136328432793408 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0)) I0425 18:12:30.671845 136328432793408 metric_logger.py:185] completed step: 0, seconds: 15.622, TFLOP/s/device: 0.870, Tokens/s/device: 131.101, total_weights: 65536, loss: 10.874 I0425 18:12:30.929070 136328432793408 metric_logger.py:185] completed step: 1, seconds: 2.232, TFLOP/s/device: 6.088, Tokens/s/device: 917.721, total_weights: 65536, loss: 10.874 I0425 18:12:31.347723 136328432793408 metric_logger.py:185] completed step: 2, seconds: 0.028, TFLOP/s/device: 478.252, Tokens/s/device: 72087.293, total_weights: 65536, loss: 10.262 I0425 18:12:31.578049 136328432793408 metric_logger.py:185] completed step: 3, seconds: 0.419, TFLOP/s/device: 32.396, Tokens/s/device: 4883.120, total_weights: 65536, loss: 9.731 I0425 18:12:32.037731 136328432793408 metric_logger.py:185] completed step: 4, seconds: 0.235, TFLOP/s/device: 57.936, Tokens/s/device: 8732.768, total_weights: 65536, loss: 9.272 I0425 18:12:32.043243 136328432793408 metric_logger.py:185] completed step: 5, seconds: 0.230, TFLOP/s/device: 59.196, Tokens/s/device: 8922.736, total_weights: 65536, loss: 8.887 I0425 18:12:54.284942 136328432793408 metric_logger.py:185] completed step: 6, seconds: 0.460, TFLOP/s/device: 29.522, Tokens/s/device: 4449.930, total_weights: 65536, loss: 8.588 I0425 18:12:54.514584 136328432793408 metric_logger.py:185] completed step: 7, seconds: 22.014, TFLOP/s/device: 0.617, Tokens/s/device: 93.033, total_weights: 65536, loss: 8.380 I0425 18:12:54.745220 136328432793408 metric_logger.py:185] completed step: 8, seconds: 0.233, TFLOP/s/device: 58.331, Tokens/s/device: 8792.303, total_weights: 65536, loss: 8.251 I0425 18:12:54.975543 136328432793408 checkpointing.py:772] Waiting for step 9 to finish before checkpoint... I0425 18:12:54.976155 136328432793408 checkpointing.py:776] Waited 0.0006401538848876953 seconds for step 9 to finish before starting checkpointing. I0425 18:12:54.978230 136328432793408 checkpoint_manager.py:2024] [process=6][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0425 18:12:55.945448 2869 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0425 18:12:57.880513 136205140219648 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260425_180433/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260425_180433_04_int8/checkpoints/0/items/array_metadatas/process_6 I0425 18:13:26.292318 136205131826944 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/gbytes_per_sec: 27.789 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 56.8422966003418 s) (per-host) I0425 18:13:26.292442 136205131826944 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 56.326323s. I0425 18:13:33.826427 136205131826944 async_checkpointer.py:144] [process=6][thread=async_save] Background save thread done. Time taken: 63.860292s. I0425 18:13:33.826659 136194419586816 async_checkpointer.py:273] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0425 18:13:33.826726 136194419586816 async_checkpointer.py:283] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0425 18:13:33.826774 136194419586816 checkpoint_manager.py:2133] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0425 18:13:33.828452 136194419586816 checkpoint_manager.py:2142] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0425 18:13:33.828650 136328432793408 checkpoint_manager.py:2036] [process=6][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0. W0425 18:13:33.828783 136328432793408 checkpoint_manager.py:1458] Waiting for previous save to complete took 38.850559 seconds. If this number is high, consider checkpointing less frequently. I0425 18:13:33.830660 136328432793408 checkpoint_manager.py:1518] [process=6] Saving checkpoint at step 9 I0425 18:13:33.834174 136328432793408 async_checkpointer.py:452] [process=6] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260425_180433/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260425_180433_04_int8/checkpoints/9. I0425 18:13:34.379449 136328432793408 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array. I0425 18:13:34.379553 136328432793408 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 18:13:34.422691 136328432793408 base_pytree_checkpoint_handler.py:153] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.044497s I0425 18:13:34.422861 136328432793408 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/blocking_gbytes_per_sec: 5.096 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.30272793769836426 s) (per-host) I0425 18:13:34.422913 136328432793408 base_pytree_checkpoint_handler.py:737] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.302788s (batch_requests_ready=0.256293s, total_serialization_initiated=0.046425s, others=0.000070s) I0425 18:13:34.423006 136328432793408 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.306929s (all_items=0.000017s, per_item={'items': '0.00001717'}, temp_paths=0.306912) I0425 18:13:34.423910 136198169290496 async_checkpointer.py:79] [process=6][thread=async_save] Background save thread started. I0425 18:13:34.424075 136328432793408 async_checkpointer.py:561] Finished blocking save. Time taken: 0.593342s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260425_180433/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260425_180433_04_int8/checkpoints/9. I0425 18:13:34.440438 136328432793408 checkpoint_manager.py:1566] [process=6][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0425 18:13:34.440681 136194419586816 async_checkpointer.py:265] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0425 18:13:34.440808 136328432793408 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260425_180433/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260425_180433_04_int8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777140774.9781995, 'wait_for_prev_duration_secs': 38.85055947303772, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777140813.8307009, 'checkpointer_blocking_duration_secs': 0.5934960842132568, 'get_old_steps_start_time': 1777140814.4242163, 'get_old_steps_duration_secs': 2.6464462280273438e-05, 'checkpoint_manager_blocking_start_time': 1777140774.9763877, 'checkpoint_manager_blocking_duration_secs': 39.46438670158386} I0425 18:13:34.440922 136328432793408 checkpointing.py:408] Started an asynchronous checkpoint save for step 9 I0425 18:13:34.440968 136328432793408 checkpoint_manager.py:2024] [process=6][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0425 18:13:39.551858 136205140219648 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260425_180433/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260425_180433_04_int8/checkpoints/9/items/array_metadatas/process_6 I0425 18:14:15.562183 136198169290496 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/gbytes_per_sec: 38.116 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.442007064819336 s) (per-host) I0425 18:14:15.562318 136198169290496 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.138290s. I0425 18:14:24.119863 136198169290496 async_checkpointer.py:144] [process=6][thread=async_save] Background save thread done. Time taken: 49.695821s. I0425 18:14:24.120090 136194419586816 async_checkpointer.py:273] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0425 18:14:24.120170 136194419586816 async_checkpointer.py:283] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0425 18:14:24.120216 136194419586816 checkpoint_manager.py:2133] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0425 18:14:24.122000 136194419586816 checkpoint_manager.py:2142] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0425 18:14:24.122177 136328432793408 checkpoint_manager.py:2036] [process=6][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9. I0425 18:14:24.122322 136328432793408 checkpoint_manager.py:2013] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0425 18:14:24.123068 136328432793408 metric_logger.py:185] completed step: 9, seconds: 0.230, TFLOP/s/device: 59.125, Tokens/s/device: 8911.904, total_weights: 65536, loss: 8.175 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Sat Apr 25 18:14:35 UTC 2026 EXIT_CODE=0