XPK Start: Sun Apr 19 06:51:16 UTC 2026 2026-04-19 06:51:20.922682: 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 00:00:1776581480.935398 10 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered E0000 00:00:1776581480.939057 10 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered W0000 00:00:1776581480.950274 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776581480.950291 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776581480.950293 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776581480.950295 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. 2026-04-19 06:51:39.992881: 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) I0419 06:51:40.505756 140593205258048 max_utils.py:273] Attempting to initialize the jax distributed system... INFO:2026-04-19 06:51:49,547:jax._src.distributed:140: Starting JAX distributed service on [::]:8482 I0419 06:51:49.547799 140593205258048 distributed.py:140] Starting JAX distributed service on [::]:8482 INFO:2026-04-19 06:51:49,550:jax._src.distributed:157: Connecting to JAX distributed service on mt-07-eval-l4hot-slice-job-0-0.mt-07-eval-l4hot:8482 I0419 06:51:49.550392 140593205258048 distributed.py:157] Connecting to JAX distributed service on mt-07-eval-l4hot-slice-job-0-0.mt-07-eval-l4hot:8482 I0419 06:51:51.584455 140593205258048 max_utils.py:284] Jax distributed system initialized! I0419 06:51:58.639630 140593205258048 max_utils.py:800] System Information: Jax Version: 0.8.1 I0419 06:51:58.639736 140593205258048 max_utils.py:801] System Information: Jaxlib Version: 0.8.1 I0419 06:51:58.639775 140593205258048 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 I0419 06:51:58.639824 140593205258048 train_utils.py:347] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0419 06:51:59.245681 140593205258048 maxtext_utils.py:1517] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0419 06:51:59.245981 140593205258048 checkpointing.py:677] Setting up checkpoint logger... I0419 06:51:59.246038 140593205258048 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True I0419 06:51:59.246085 140593205258048 pytree_checkpoint_handler.py:589] save_device_host_concurrent_bytes=None I0419 06:51:59.246441 140593205258048 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 0x7fddebb6d160>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0419 06:52:02.861545 140593205258048 checkpointing.py:265] Enabling policy for fixed interval checkpointing. I0419 06:52:02.861904 140593205258048 checkpoint_manager.py:709] [process=0][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7fcad9cfcbf0>}, handler_registry=None I0419 06:52:02.862143 140593205258048 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7fcad9cfcbf0>` 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`. I0419 06:52:02.862192 140593205258048 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7fcad9d97020>` 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`. I0419 06:52:02.862228 140593205258048 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 0x7fcad9cfcbf0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7fcad9cfcbf0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7fcad9d97020>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7fcad9d97020>}). I0419 06:52:02.862729 140593205258048 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.33 I0419 06:52:02.862818 140593205258048 async_checkpointer.py:177] [process=0][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7fcad9346ac0> timeout: 600 secs and primary_host=0 for async checkpoint writes I0419 06:52:04.566884 140593205258048 checkpoint_manager.py:1818] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615_07_eval/checkpoints I0419 06:52:05.844686 140593205258048 checkpoint_manager.py:929] [process=0][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_20260419_063615/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615_07_eval/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7fcad9d913a0> I0419 06:52:05.844888 140593205258048 checkpointing.py:301] Checkpoint manager created! I0419 06:52:06.731938 140593205258048 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0419 06:52:06.732048 140593205258048 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0419 06:52:07.103019 140593205258048 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0419 06:52:07.103120 140593205258048 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0419 06:52:07.118947 140593205258048 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0419 06:52:07.119007 140593205258048 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0419 06:52:07.142069 140593205258048 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0419 06:52:07.142138 140593205258048 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0419 06:52:07.157918 140593205258048 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0419 06:52:07.157978 140593205258048 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0419 06:52:07.173738 140593205258048 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0419 06:52:07.173801 140593205258048 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0419 06:52:07.198570 140593205258048 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0419 06:52:07.198640 140593205258048 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0419 06:52:07.218047 140593205258048 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0419 06:52:07.218112 140593205258048 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0419 06:52:07.414947 140593205258048 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint I0419 06:52:07.415059 140593205258048 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0419 06:52:08.830340 140593205258048 maxtext_utils.py:1620] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: PartitionSpec('norm',) Physical: (None,) I0419 06:52:08.830475 140593205258048 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) I0419 06:52:08.830532 140593205258048 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) I0419 06:52:08.830589 140593205258048 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') I0419 06:52:08.830641 140593205258048 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) I0419 06:52:08.830680 140593205258048 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) I0419 06:52:08.830732 140593205258048 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) I0419 06:52:08.830783 140593205258048 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') I0419 06:52:08.830845 140593205258048 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) I0419 06:52:08.830888 140593205258048 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) I0419 06:52:08.830936 140593205258048 maxtext_utils.py:1620] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: PartitionSpec('embed', 'vocab') Physical: ('fsdp', None) I0419 06:52:08.830984 140593205258048 maxtext_utils.py:1620] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: PartitionSpec('vocab', 'embed') Physical: (None, 'fsdp') I0419 06:52:09.335841 140593205258048 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0419 06:52:09.335940 140593205258048 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0419 06:52:09.350705 140593205258048 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0419 06:52:09.350768 140593205258048 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0419 06:52:20.172975 140593205258048 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. I0419 06:52:20.178962 140593205258048 metric_logger.py:289] number parameters: 1.104 billion I0419 06:52:31.695363 140593205258048 checkpointing.py:772] Waiting for step 0 to finish before checkpoint... I0419 06:52:31.848889 140593205258048 checkpointing.py:776] Waited 0.15350627899169922 seconds for step 0 to finish before starting checkpointing. I0419 06:52:31.851510 140593205258048 checkpoint_manager.py:2013] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0419 06:52:31.853288 140593205258048 checkpoint_manager.py:1518] [process=0] Saving checkpoint at step 0 I0419 06:52:31.856073 140593205258048 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615_07_eval/checkpoints/0. I0419 06:52:33.001071 140593205258048 signaling_client.py:364] Using JaxDistributedSignalingClient I0419 06:52:33.251408 140465999427328 atomicity.py:137] Creating tmp directory gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615_07_eval/checkpoints/0 I0419 06:52:33.308033 140593205258048 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array. I0419 06:52:33.308134 140593205258048 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 I0419 06:52:33.549357 140593205258048 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.242398s I0419 06:52:33.550125 140593205258048 base_pytree_checkpoint_handler.py:129] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.848 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.5415439605712891 s) (per-host) I0419 06:52:33.550197 140593205258048 base_pytree_checkpoint_handler.py:737] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 0.541630s (batch_requests_ready=0.294671s, total_serialization_initiated=0.246272s, others=0.000687s) I0419 06:52:33.550275 140593205258048 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.545467s (all_items=0.000019s, per_item={'items': '0.00001931'}, temp_paths=0.545448) I0419 06:52:33.551194 140467098347264 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0419 06:52:33.551351 140593205258048 async_checkpointer.py:561] Finished blocking save. Time taken: 1.697991s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615_07_eval/checkpoints/0. I0419 06:52:33.969419 140593205258048 checkpoint_manager.py:1566] [process=0][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0419 06:52:33.969802 140465991034624 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0419 06:52:33.969988 140593205258048 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615_07_eval/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776581551.8514922, 'wait_for_prev_duration_secs': 6.389617919921875e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776581551.8533263, 'checkpointer_blocking_duration_secs': 1.6981301307678223, 'get_old_steps_start_time': 1776581553.5514755, 'get_old_steps_duration_secs': 2.5987625122070312e-05, 'checkpoint_manager_blocking_start_time': 1776581551.8495271, 'checkpoint_manager_blocking_duration_secs': 2.120418071746826} I0419 06:52:33.970095 140593205258048 checkpointing.py:408] Started an asynchronous checkpoint save for step 0 I0419 06:52:33.970155 140593205258048 max_utils.py:750] Memstats: After params initialized: I0419 06:52:33.970214 140593205258048 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_0(process=0,(0,0,0,0)) I0419 06:52:33.970249 140593205258048 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_1(process=0,(1,0,0,0)) I0419 06:52:33.970276 140593205258048 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_4(process=0,(0,1,0,0)) I0419 06:52:33.970303 140593205258048 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_5(process=0,(1,1,0,0)) I0419 06:52:34.268736 140593205258048 metric_logger.py:185] completed step: 0, seconds: 11.171, TFLOP/s/device: 1.216, Tokens/s/device: 183.330, total_weights: 65536, loss: 10.874 I0419 06:52:34.272464 140593205258048 metric_logger.py:269] To see full metrics 'tensorboard --logdir=gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615_07_eval/tensorboard/' I0419 06:52:34.680528 140593205258048 metric_logger.py:185] completed step: 1, seconds: 2.572, TFLOP/s/device: 5.283, Tokens/s/device: 796.343, total_weights: 65536, loss: 10.874 I0419 06:52:34.826920 140593205258048 metric_logger.py:185] completed step: 2, seconds: 0.413, TFLOP/s/device: 32.932, Tokens/s/device: 4963.838, total_weights: 65536, loss: 10.263 I0419 06:52:34.974547 140593205258048 metric_logger.py:185] completed step: 3, seconds: 0.008, TFLOP/s/device: 1683.242, Tokens/s/device: 253716.551, total_weights: 65536, loss: 9.734 I0419 06:52:53.409260 140593205258048 metric_logger.py:185] completed step: 4, seconds: 0.149, TFLOP/s/device: 91.461, Tokens/s/device: 13786.047, total_weights: 65536, loss: 9.278 I0419 06:52:53.418215 140593205258048 metric_logger.py:185] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.153, Tokens/s/device: 13890.302, total_weights: 65536, loss: 8.892 I0419 06:52:53.564612 140593205258048 metric_logger.py:185] completed step: 6, seconds: 18.433, TFLOP/s/device: 0.737, Tokens/s/device: 111.102, total_weights: 65536, loss: 8.592 I0419 06:52:53.711880 140593205258048 metric_logger.py:185] completed step: 7, seconds: 0.006, TFLOP/s/device: 2110.458, Tokens/s/device: 318111.215, total_weights: 65536, loss: 8.384 I0419 06:52:53.859373 140593205258048 metric_logger.py:185] completed step: 8, seconds: 0.147, TFLOP/s/device: 92.184, Tokens/s/device: 13894.920, total_weights: 65536, loss: 8.255 I0419 06:52:54.006494 140593205258048 checkpointing.py:772] Waiting for step 9 to finish before checkpoint... I0419 06:52:54.007270 140593205258048 checkpointing.py:776] Waited 0.0007929801940917969 seconds for step 9 to finish before starting checkpointing. I0419 06:52:54.009270 140593205258048 checkpoint_manager.py:2024] [process=0][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0419 06:52:54.059282 140467056383744 checkpoint.py:188] Wrote Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776581573661192516, 'commit_timestamp_nsecs': None, 'custom_metadata': {}}, json={"item_handlers": null, "metrics": {}, "performance_metrics": {}, "init_timestamp_nsecs": 1776581573661192516, "commit_timestamp_nsecs": null, "custom_metadata": {}} to gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615_07_eval/checkpoints/0/_CHECKPOINT_METADATA I0419 06:52:54.359009 140467593254656 atomicity.py:137] Creating tmp directory gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615_07_eval/checkpoints/0/items I0419 06:52:55.494462 2684 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0419 06:52:57.585686 140470319572736 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615_07_eval/checkpoints/0/items/array_metadatas/process_0 I0419 06:53:32.732963 140470311180032 base_pytree_checkpoint_handler.py:1232] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 37.239803s (commit=36.165547s, array_metadata_write=1.074256s) I0419 06:53:32.734073 140467098347264 base_pytree_checkpoint_handler.py:129] [process=0] /jax/checkpoint/write/gbytes_per_sec: 26.448 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 59.725462436676025 s) (per-host) I0419 06:53:32.734195 140467098347264 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 59.182894s. I0419 06:53:33.481345 140467098347264 checkpoint.py:228] Read Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776581573661192516, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} from gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615_07_eval/checkpoints/0/_CHECKPOINT_METADATA I0419 06:53:34.648282 140467098347264 array_metadata_store.py:411] [process=0][thread=async_save] Validated ArrayMetadata from all 8 hosts. Time taken: 0.000238s. I0419 06:53:34.667319 140467056383744 checkpoint.py:247] Updated Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776581573661192516, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} to gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615_07_eval/checkpoints/0/_CHECKPOINT_METADATA I0419 06:53:34.870125 140467098347264 ocdbt_utils.py:49] Param validation support for Zarr3 will be added later (b/362328389). I0419 06:53:35.798526 140467098347264 base_pytree_checkpoint_handler.py:1356] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 2.176397s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615_07_eval/checkpoints/0/items I0419 06:53:35.801367 140467098347264 atomicity.py:608] Finalizing gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615_07_eval/checkpoints/0/items I0419 06:53:36.242141 140467098347264 atomicity.py:608] Finalizing gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615_07_eval/checkpoints/0 I0419 06:53:38.436345 140467098347264 atomicity.py:790] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615_07_eval/checkpoints/0`. I0419 06:53:38.437144 140467098347264 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 66.583805s. directory=gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615_07_eval/checkpoints/0 I0419 06:53:38.439139 140467098347264 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 64.887837s. I0419 06:53:38.439357 140465991034624 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0419 06:53:38.439473 140465991034624 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0419 06:53:38.439538 140465991034624 checkpoint_manager.py:2133] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0419 06:53:38.442167 140465991034624 checkpoint_manager.py:2142] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0419 06:53:38.442316 140593205258048 checkpoint_manager.py:2036] [process=0][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0. W0419 06:53:38.442419 140593205258048 checkpoint_manager.py:1458] Waiting for previous save to complete took 44.433145 seconds. If this number is high, consider checkpointing less frequently. I0419 06:53:38.444305 140593205258048 checkpoint_manager.py:1518] [process=0] Saving checkpoint at step 9 I0419 06:53:38.447788 140593205258048 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615_07_eval/checkpoints/9. I0419 06:53:39.815541 140467098347264 atomicity.py:137] Creating tmp directory gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615_07_eval/checkpoints/9 I0419 06:53:39.831897 140593205258048 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array. I0419 06:53:39.832010 140593205258048 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 I0419 06:53:39.859824 140593205258048 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.029013s I0419 06:53:39.860680 140593205258048 base_pytree_checkpoint_handler.py:129] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 5.384 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2865293025970459 s) (per-host) I0419 06:53:39.860751 140593205258048 base_pytree_checkpoint_handler.py:737] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 0.286617s (batch_requests_ready=0.254477s, total_serialization_initiated=0.031359s, others=0.000781s) I0419 06:53:39.860849 140593205258048 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.290547s (all_items=0.000016s, per_item={'items': '0.00001621'}, temp_paths=0.290531) I0419 06:53:39.861685 140466032998144 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0419 06:53:39.861844 140593205258048 async_checkpointer.py:561] Finished blocking save. Time taken: 1.417469s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615_07_eval/checkpoints/9. I0419 06:53:40.335840 140593205258048 checkpoint_manager.py:1566] [process=0][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0419 06:53:40.336217 140465991034624 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0419 06:53:40.336397 140593205258048 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615_07_eval/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776581574.0092392, 'wait_for_prev_duration_secs': 44.43314504623413, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776581618.4443464, 'checkpointer_blocking_duration_secs': 1.4176061153411865, 'get_old_steps_start_time': 1776581619.861973, 'get_old_steps_duration_secs': 2.9325485229492188e-05, 'checkpoint_manager_blocking_start_time': 1776581574.0075078, 'checkpoint_manager_blocking_duration_secs': 46.32884931564331} I0419 06:53:40.336534 140593205258048 checkpointing.py:408] Started an asynchronous checkpoint save for step 9 I0419 06:53:40.336579 140593205258048 checkpoint_manager.py:2024] [process=0][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0419 06:53:41.548847 140470311180032 atomicity.py:137] Creating tmp directory gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615_07_eval/checkpoints/9/items I0419 06:53:44.697420 140466520389376 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615_07_eval/checkpoints/9/items/array_metadatas/process_0 I0419 06:54:25.799015 140466511996672 base_pytree_checkpoint_handler.py:1232] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 42.742202s (commit=41.619303s, array_metadata_write=1.122899s) I0419 06:54:25.800172 140466032998144 base_pytree_checkpoint_handler.py:129] [process=0] /jax/checkpoint/write/gbytes_per_sec: 34.171 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 46.22598147392273 s) (per-host) I0419 06:54:25.800292 140466032998144 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 45.938499s. I0419 06:54:27.899824 140466032998144 ocdbt_utils.py:49] Param validation support for Zarr3 will be added later (b/362328389). I0419 06:54:28.089436 140466032998144 array_metadata_store.py:411] [process=0][thread=async_save] Validated ArrayMetadata from all 8 hosts. Time taken: 0.000243s. I0419 06:54:29.000507 140466032998144 base_pytree_checkpoint_handler.py:1356] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 1.935679s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615_07_eval/checkpoints/9/items I0419 06:54:29.003069 140466032998144 atomicity.py:608] Finalizing gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615_07_eval/checkpoints/9/items I0419 06:54:29.428596 140466032998144 atomicity.py:608] Finalizing gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615_07_eval/checkpoints/9 I0419 06:54:31.171560 140466032998144 atomicity.py:790] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615_07_eval/checkpoints/9`. I0419 06:54:31.172351 140466032998144 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 52.727978s. directory=gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260419_063615_07_eval/checkpoints/9 I0419 06:54:31.173781 140466032998144 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 51.311986s. I0419 06:54:31.173933 140465991034624 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0419 06:54:31.174011 140465991034624 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0419 06:54:31.174080 140465991034624 checkpoint_manager.py:2133] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0419 06:54:31.176928 140465991034624 checkpoint_manager.py:2142] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0419 06:54:31.177088 140593205258048 checkpoint_manager.py:2036] [process=0][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9. I0419 06:54:31.177235 140593205258048 checkpoint_manager.py:2013] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0419 06:54:31.177899 140593205258048 metric_logger.py:185] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.141, Tokens/s/device: 13888.512, 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: Sun Apr 19 06:54:43 UTC 2026 EXIT_CODE=0