XPK Start: Wed Apr 22 19:08:24 UTC 2026 2026-04-22 19:08:28.992287: 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 00:00:1776884909.004748 10 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered E0000 00:00:1776884909.008417 10 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered W0000 00:00:1776884909.020145 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776884909.020165 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776884909.020168 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776884909.020170 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. 2026-04-22 19:08:49.265752: 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) I0422 19:08:49.780224 134284584347456 max_utils.py:273] Attempting to initialize the jax distributed system... INFO:2026-04-22 19:08:58,821:jax._src.distributed:140: Starting JAX distributed service on [::]:8482 I0422 19:08:58.821824 134284584347456 distributed.py:140] Starting JAX distributed service on [::]:8482 INFO:2026-04-22 19:08:58,824:jax._src.distributed:157: Connecting to JAX distributed service on mt-01-base-qywi3-slice-job-0-0.mt-01-base-qywi3:8482 I0422 19:08:58.824083 134284584347456 distributed.py:157] Connecting to JAX distributed service on mt-01-base-qywi3-slice-job-0-0.mt-01-base-qywi3:8482 I0422 19:09:02.443327 134284584347456 max_utils.py:284] Jax distributed system initialized! I0422 19:09:09.716675 134284584347456 max_utils.py:800] System Information: Jax Version: 0.8.1 I0422 19:09:09.716787 134284584347456 max_utils.py:801] System Information: Jaxlib Version: 0.8.1 I0422 19:09:09.716828 134284584347456 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 I0422 19:09:09.716864 134284584347456 train_utils.py:347] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0422 19:09:10.339552 134284584347456 maxtext_utils.py:1517] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0422 19:09:10.339843 134284584347456 checkpointing.py:677] Setting up checkpoint logger... I0422 19:09:10.339916 134284584347456 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True I0422 19:09:10.339962 134284584347456 pytree_checkpoint_handler.py:589] save_device_host_concurrent_bytes=None I0422 19:09:10.340317 134284584347456 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 0x7a210f16d2b0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0422 19:09:14.152148 134284584347456 checkpointing.py:265] Enabling policy for fixed interval checkpointing. I0422 19:09:14.152400 134284584347456 checkpoint_manager.py:709] [process=4][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7a0d281b2030>}, handler_registry=None I0422 19:09:14.152638 134284584347456 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7a0d281b2030>` 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`. I0422 19:09:14.152688 134284584347456 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a0d281b0170>` 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`. I0422 19:09:14.152724 134284584347456 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 0x7a0d281b2030>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7a0d281b2030>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a0d281b0170>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a0d281b0170>}). I0422 19:09:14.153245 134284584347456 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.33 I0422 19:09:14.153329 134284584347456 async_checkpointer.py:177] [process=4][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7a0cc8252ac0> timeout: 600 secs and primary_host=0 for async checkpoint writes I0422 19:09:15.259447 134284584347456 checkpoint_manager.py:1818] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741_01_base/checkpoints I0422 19:09:15.703861 134284584347456 checkpoint_manager.py:929] [process=4][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_20260422_190741/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741_01_base/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7a0d281b74a0> I0422 19:09:15.704074 134284584347456 checkpointing.py:301] Checkpoint manager created! I0422 19:09:16.600484 134284584347456 nnx_wrappers.py:442] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0422 19:09:16.600591 134284584347456 nnx_wrappers.py:442] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0422 19:09:16.972827 134284584347456 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0422 19:09:16.972937 134284584347456 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0422 19:09:16.988790 134284584347456 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0422 19:09:16.988850 134284584347456 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0422 19:09:17.011991 134284584347456 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0422 19:09:17.012065 134284584347456 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0422 19:09:17.028105 134284584347456 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0422 19:09:17.028172 134284584347456 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0422 19:09:17.044114 134284584347456 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0422 19:09:17.044181 134284584347456 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0422 19:09:17.069167 134284584347456 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0422 19:09:17.069236 134284584347456 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0422 19:09:17.089173 134284584347456 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0422 19:09:17.089244 134284584347456 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0422 19:09:17.281654 134284584347456 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint I0422 19:09:17.281764 134284584347456 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0422 19:09:18.713993 134284584347456 maxtext_utils.py:1620] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: PartitionSpec('norm',) Physical: (None,) I0422 19:09:18.714120 134284584347456 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) I0422 19:09:18.714176 134284584347456 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) I0422 19:09:18.714234 134284584347456 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') I0422 19:09:18.714294 134284584347456 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) I0422 19:09:18.714363 134284584347456 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) I0422 19:09:18.714450 134284584347456 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) I0422 19:09:18.714536 134284584347456 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') I0422 19:09:18.714601 134284584347456 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) I0422 19:09:18.714658 134284584347456 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) I0422 19:09:18.714731 134284584347456 maxtext_utils.py:1620] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: PartitionSpec('embed', 'vocab') Physical: ('fsdp', None) I0422 19:09:18.714805 134284584347456 maxtext_utils.py:1620] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: PartitionSpec('vocab', 'embed') Physical: (None, 'fsdp') I0422 19:09:19.226774 134284584347456 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0422 19:09:19.226885 134284584347456 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0422 19:09:19.241642 134284584347456 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0422 19:09:19.241700 134284584347456 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0422 19:09:29.868183 134284584347456 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. I0422 19:09:29.869186 134284584347456 metric_logger.py:289] number parameters: 1.104 billion I0422 19:09:41.001276 134284584347456 checkpointing.py:772] Waiting for step 0 to finish before checkpoint... I0422 19:09:41.154023 134284584347456 checkpointing.py:776] Waited 0.15272736549377441 seconds for step 0 to finish before starting checkpointing. I0422 19:09:41.156528 134284584347456 checkpoint_manager.py:2013] [process=4][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0422 19:09:41.158282 134284584347456 checkpoint_manager.py:1518] [process=4] Saving checkpoint at step 0 I0422 19:09:41.161071 134284584347456 async_checkpointer.py:452] [process=4] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741_01_base/checkpoints/0. I0422 19:09:41.746048 134284584347456 signaling_client.py:364] Using JaxDistributedSignalingClient I0422 19:09:41.747075 134284584347456 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array. I0422 19:09:41.747134 134284584347456 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 I0422 19:09:41.993774 134284584347456 base_pytree_checkpoint_handler.py:153] [process=4][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.247802s I0422 19:09:41.993967 134284584347456 base_pytree_checkpoint_handler.py:129] [process=4] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.992 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.5155282020568848 s) (per-host) I0422 19:09:41.994021 134284584347456 base_pytree_checkpoint_handler.py:737] [process=4][thread=MainThread] Initiated Pytree async_save. Time taken: 0.515593s (batch_requests_ready=0.263917s, total_serialization_initiated=0.251603s, others=0.000072s) I0422 19:09:41.994117 134284584347456 composite_checkpoint_handler.py:715] [process=4][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.519739s (all_items=0.000019s, per_item={'items': '0.00001931'}, temp_paths=0.519720) I0422 19:09:41.995118 134159737546496 async_checkpointer.py:79] [process=4][thread=async_save] Background save thread started. I0422 19:09:41.995300 134284584347456 async_checkpointer.py:561] Finished blocking save. Time taken: 0.836945s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741_01_base/checkpoints/0. I0422 19:09:42.033021 134284584347456 checkpoint_manager.py:1566] [process=4][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0422 19:09:42.033355 134158630233856 async_checkpointer.py:265] [process=4][thread=save_finalize] Waiting for background save thread=async_save. I0422 19:09:42.033515 134284584347456 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741_01_base/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776884981.156503, 'wait_for_prev_duration_secs': 6.890296936035156e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776884981.158322, 'checkpointer_blocking_duration_secs': 0.8370907306671143, 'get_old_steps_start_time': 1776884981.995435, 'get_old_steps_duration_secs': 2.4080276489257812e-05, 'checkpoint_manager_blocking_start_time': 1776884981.154626, 'checkpoint_manager_blocking_duration_secs': 0.8788506984710693} I0422 19:09:42.033623 134284584347456 checkpointing.py:408] Started an asynchronous checkpoint save for step 0 I0422 19:09:42.033677 134284584347456 max_utils.py:750] Memstats: After params initialized: I0422 19:09:42.033728 134284584347456 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_16(process=4,(0,4,0,0)) I0422 19:09:42.033762 134284584347456 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_17(process=4,(1,4,0,0)) I0422 19:09:42.033791 134284584347456 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_20(process=4,(0,5,0,0)) I0422 19:09:42.033816 134284584347456 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_21(process=4,(1,5,0,0)) I0422 19:09:42.305075 134284584347456 metric_logger.py:185] completed step: 0, seconds: 11.132, TFLOP/s/device: 1.221, Tokens/s/device: 183.974, total_weights: 65536, loss: 10.874 I0422 19:09:42.468484 134284584347456 metric_logger.py:185] completed step: 1, seconds: 1.302, TFLOP/s/device: 10.432, Tokens/s/device: 1572.434, total_weights: 65536, loss: 10.874 I0422 19:09:42.889865 134284584347456 metric_logger.py:185] completed step: 2, seconds: 0.016, TFLOP/s/device: 826.619, Tokens/s/device: 124596.946, total_weights: 65536, loss: 10.263 I0422 19:09:43.037282 134284584347456 metric_logger.py:185] completed step: 3, seconds: 0.422, TFLOP/s/device: 32.227, Tokens/s/device: 4857.673, total_weights: 65536, loss: 9.734 I0422 19:09:43.332651 134284584347456 metric_logger.py:185] completed step: 4, seconds: 0.153, TFLOP/s/device: 89.015, Tokens/s/device: 13417.367, total_weights: 65536, loss: 9.278 I0422 19:09:43.338342 134284584347456 metric_logger.py:185] completed step: 5, seconds: 0.148, TFLOP/s/device: 91.961, Tokens/s/device: 13861.346, total_weights: 65536, loss: 8.892 I0422 19:10:02.087736 134284584347456 metric_logger.py:185] completed step: 6, seconds: 0.295, TFLOP/s/device: 45.996, Tokens/s/device: 6933.043, total_weights: 65536, loss: 8.592 I0422 19:10:02.235760 134284584347456 metric_logger.py:185] completed step: 7, seconds: 18.603, TFLOP/s/device: 0.730, Tokens/s/device: 110.090, total_weights: 65536, loss: 8.384 I0422 19:10:02.383195 134284584347456 metric_logger.py:185] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.451, Tokens/s/device: 13482.998, total_weights: 65536, loss: 8.255 I0422 19:10:02.530321 134284584347456 checkpointing.py:772] Waiting for step 9 to finish before checkpoint... I0422 19:10:02.531001 134284584347456 checkpointing.py:776] Waited 0.0007061958312988281 seconds for step 9 to finish before starting checkpointing. I0422 19:10:02.533098 134284584347456 checkpoint_manager.py:2024] [process=4][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0422 19:10:03.231885 2624 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0422 19:10:05.178806 134159745939200 array_metadata_store.py:203] [process=4][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741_01_base/checkpoints/0/items/array_metadatas/process_4 I0422 19:10:36.678255 134159737546496 base_pytree_checkpoint_handler.py:129] [process=4] /jax/checkpoint/write/gbytes_per_sec: 28.616 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 55.19976878166199 s) (per-host) I0422 19:10:36.678375 134159737546496 async_checkpointer.py:90] [process=4][thread=async_save] 3 Handler Commit operations completed. Time taken: 54.683131s. I0422 19:10:48.828160 134159737546496 async_checkpointer.py:144] [process=4][thread=async_save] Background save thread done. Time taken: 66.832901s. I0422 19:10:48.828445 134158630233856 async_checkpointer.py:273] [process=4][thread=save_finalize] Done with waiting for background save thread=async_save. I0422 19:10:48.828588 134158630233856 async_checkpointer.py:283] [process=4][thread=save_finalize] No errors found in background save thread=async_save. I0422 19:10:48.828642 134158630233856 checkpoint_manager.py:2133] [process=4][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0422 19:10:48.831233 134158630233856 checkpoint_manager.py:2142] [process=4][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0422 19:10:48.831428 134284584347456 checkpoint_manager.py:2036] [process=4][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0. W0422 19:10:48.831564 134284584347456 checkpoint_manager.py:1458] Waiting for previous save to complete took 46.298465 seconds. If this number is high, consider checkpointing less frequently. I0422 19:10:48.834117 134284584347456 checkpoint_manager.py:1518] [process=4] Saving checkpoint at step 9 I0422 19:10:48.837573 134284584347456 async_checkpointer.py:452] [process=4] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741_01_base/checkpoints/9. I0422 19:10:49.799422 134284584347456 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array. I0422 19:10:49.799522 134284584347456 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 I0422 19:10:49.843526 134284584347456 base_pytree_checkpoint_handler.py:153] [process=4][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.045293s I0422 19:10:49.843694 134284584347456 base_pytree_checkpoint_handler.py:129] [process=4] /jax/checkpoint/write/blocking_gbytes_per_sec: 5.122 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.301175594329834 s) (per-host) I0422 19:10:49.843747 134284584347456 base_pytree_checkpoint_handler.py:737] [process=4][thread=MainThread] Initiated Pytree async_save. Time taken: 0.301237s (batch_requests_ready=0.254012s, total_serialization_initiated=0.047157s, others=0.000068s) I0422 19:10:49.843839 134284584347456 composite_checkpoint_handler.py:715] [process=4][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.305392s (all_items=0.000015s, per_item={'items': '0.00001526'}, temp_paths=0.305377) I0422 19:10:49.844709 134159696848640 async_checkpointer.py:79] [process=4][thread=async_save] Background save thread started. I0422 19:10:49.844886 134284584347456 async_checkpointer.py:561] Finished blocking save. Time taken: 1.010679s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741_01_base/checkpoints/9. I0422 19:10:49.859564 134284584347456 checkpoint_manager.py:1566] [process=4][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0422 19:10:49.859848 134158630233856 async_checkpointer.py:265] [process=4][thread=save_finalize] Waiting for background save thread=async_save. I0422 19:10:49.860024 134284584347456 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741_01_base/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776885002.5330696, 'wait_for_prev_duration_secs': 46.29846453666687, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776885048.834166, 'checkpointer_blocking_duration_secs': 1.010829210281372, 'get_old_steps_start_time': 1776885049.8450136, 'get_old_steps_duration_secs': 2.4318695068359375e-05, 'checkpoint_manager_blocking_start_time': 1776885002.5312312, 'checkpoint_manager_blocking_duration_secs': 47.32875895500183} I0422 19:10:49.860132 134284584347456 checkpointing.py:408] Started an asynchronous checkpoint save for step 9 I0422 19:10:49.860175 134284584347456 checkpoint_manager.py:2024] [process=4][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0422 19:10:54.784967 134159745939200 array_metadata_store.py:203] [process=4][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741_01_base/checkpoints/9/items/array_metadatas/process_4 I0422 19:11:30.728596 134159696848640 base_pytree_checkpoint_handler.py:129] [process=4] /jax/checkpoint/write/gbytes_per_sec: 38.353 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.186039209365845 s) (per-host) I0422 19:11:30.728702 134159696848640 async_checkpointer.py:90] [process=4][thread=async_save] 3 Handler Commit operations completed. Time taken: 40.883879s. I0422 19:11:39.385681 134159696848640 async_checkpointer.py:144] [process=4][thread=async_save] Background save thread done. Time taken: 49.540843s. I0422 19:11:39.386007 134158630233856 async_checkpointer.py:273] [process=4][thread=save_finalize] Done with waiting for background save thread=async_save. I0422 19:11:39.386120 134158630233856 async_checkpointer.py:283] [process=4][thread=save_finalize] No errors found in background save thread=async_save. I0422 19:11:39.386166 134158630233856 checkpoint_manager.py:2133] [process=4][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0422 19:11:39.387614 134158630233856 checkpoint_manager.py:2142] [process=4][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0422 19:11:39.387804 134284584347456 checkpoint_manager.py:2036] [process=4][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9. I0422 19:11:39.387963 134284584347456 checkpoint_manager.py:2013] [process=4][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0422 19:11:39.388666 134284584347456 metric_logger.py:185] completed step: 9, seconds: 0.148, TFLOP/s/device: 91.802, Tokens/s/device: 13837.370, total_weights: 65536, loss: 8.179 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Wed Apr 22 19:11:49 UTC 2026 EXIT_CODE=0