XPK Start: Thu Apr 23 17:43:57 UTC 2026 2026-04-23 17:44:01.986644: 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 00:00:1776966241.999195 10 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered E0000 00:00:1776966242.002900 10 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered W0000 00:00:1776966242.014241 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776966242.014261 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776966242.014263 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776966242.014265 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. 2026-04-23 17:44:21.359511: E external/local_xla/xla/stream_executor/cuda/cuda_platform.cc:51] failed call to cuInit: INTERNAL: CUDA error: Failed call to cuInit: UNKNOWN ERROR (303) I0423 17:44:21.879052 136085542016832 max_utils.py:273] Attempting to initialize the jax distributed system... INFO:2026-04-23 17:44:30,919:jax._src.distributed:140: Starting JAX distributed service on [::]:8482 I0423 17:44:30.919603 136085542016832 distributed.py:140] Starting JAX distributed service on [::]:8482 INFO:2026-04-23 17:44:30,921:jax._src.distributed:157: Connecting to JAX distributed service on mt-06-grad-accum-w8cfv-slice-job-0-0.mt-06-grad-accum-w8cfv:8482 I0423 17:44:30.921843 136085542016832 distributed.py:157] Connecting to JAX distributed service on mt-06-grad-accum-w8cfv-slice-job-0-0.mt-06-grad-accum-w8cfv:8482 I0423 17:44:31.718818 136085542016832 max_utils.py:284] Jax distributed system initialized! I0423 17:44:38.618059 136085542016832 max_utils.py:800] System Information: Jax Version: 0.8.1 I0423 17:44:38.618163 136085542016832 max_utils.py:801] System Information: Jaxlib Version: 0.8.1 I0423 17:44:38.618203 136085542016832 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 I0423 17:44:38.618238 136085542016832 train_utils.py:377] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0423 17:44:39.240835 136085542016832 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0423 17:44:39.353366 136085542016832 checkpointing.py:688] Setting up checkpoint logger... I0423 17:44:39.353482 136085542016832 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0423 17:44:39.353527 136085542016832 pytree_checkpoint_handler.py:589] save_device_host_concurrent_bytes=None I0423 17:44:39.353741 136085542016832 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 0x7bc45b9787a0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0423 17:44:42.288028 136085542016832 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0423 17:44:42.288379 136085542016832 checkpoint_manager.py:709] [process=5][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7bafd02dc710>}, handler_registry=None I0423 17:44:42.288609 136085542016832 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7bafd02dc710>` for item "items" and save args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>` to `_handler_registry`. I0423 17:44:42.288669 136085542016832 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7bafb824bbf0>` for item "metrics" and save args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>` to `_handler_registry`. I0423 17:44:42.288709 136085542016832 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 0x7bafd02dc710>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7bafd02dc710>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7bafb824bbf0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7bafb824bbf0>}). I0423 17:44:42.289032 136085542016832 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.33 I0423 17:44:42.289110 136085542016832 async_checkpointer.py:177] [process=5][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7bafd01d0f40> timeout: 600 secs and primary_host=0 for async checkpoint writes I0423 17:44:43.129382 136085542016832 checkpoint_manager.py:1818] Found 0 checkpoint steps in gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/nnx_xpk_feat_nnx_set_defaults_true_20260423_155242_06_grad_accum/checkpoints I0423 17:44:43.539648 136085542016832 checkpoint_manager.py:929] [process=5][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/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/nnx_xpk_feat_nnx_set_defaults_true_20260423_155242_06_grad_accum/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7bafb8253a10> I0423 17:44:43.539867 136085542016832 checkpointing.py:302] Checkpoint manager created! I0423 17:44:45.264219 136085542016832 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0423 17:44:45.264340 136085542016832 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0423 17:44:46.683905 136085542016832 maxtext_utils.py:1749] decoder/decoder_norm/scale/value Shape: float32[2048] Physical: (None,) I0423 17:44:46.684031 136085542016832 maxtext_utils.py:1749] decoder/layers/mlp/wi_0/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0423 17:44:46.684086 136085542016832 maxtext_utils.py:1749] decoder/layers/mlp/wi_1/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0423 17:44:46.684131 136085542016832 maxtext_utils.py:1749] decoder/layers/mlp/wo/kernel/value Shape: float32[7168,16,2048] Physical: (None, None, 'fsdp') I0423 17:44:46.684169 136085542016832 maxtext_utils.py:1749] decoder/layers/post_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0423 17:44:46.684203 136085542016832 maxtext_utils.py:1749] decoder/layers/pre_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0423 17:44:46.684240 136085542016832 maxtext_utils.py:1749] decoder/layers/self_attention/key/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0423 17:44:46.684275 136085542016832 maxtext_utils.py:1749] decoder/layers/self_attention/out/kernel/value Shape: float32[16,16,128,2048] Physical: (None, None, None, 'fsdp') I0423 17:44:46.684310 136085542016832 maxtext_utils.py:1749] decoder/layers/self_attention/query/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0423 17:44:46.684344 136085542016832 maxtext_utils.py:1749] decoder/layers/self_attention/value/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0423 17:44:46.684376 136085542016832 maxtext_utils.py:1749] decoder/logits_dense/kernel/value Shape: float32[2048,32000] Physical: ('fsdp', None) I0423 17:44:46.684409 136085542016832 maxtext_utils.py:1749] token_embedder/embedding/value Shape: float32[32000,2048] Physical: (None, 'fsdp') I0423 17:44:47.061801 136085542016832 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[2048]............................................... Unknown. I0423 17:44:47.061898 136085542016832 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[2048]............................................... (None,). I0423 17:44:47.076564 136085542016832 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[2048,16,7168]....................................... Unknown. I0423 17:44:47.076620 136085542016832 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[2048,16,7168]....................................... ('fsdp', None, None). I0423 17:44:47.105431 136085542016832 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[7168,16,2048]....................................... Unknown. I0423 17:44:47.105497 136085542016832 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[7168,16,2048]....................................... (None, None, 'fsdp'). I0423 17:44:47.119893 136085542016832 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[2048,16]............................................ Unknown. I0423 17:44:47.119958 136085542016832 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[2048,16]............................................ (None, None). I0423 17:44:47.148621 136085542016832 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[2048,16,16,128]..................................... Unknown. I0423 17:44:47.148701 136085542016832 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[2048,16,16,128]..................................... ('fsdp', None, None, None). I0423 17:44:47.163125 136085542016832 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[16,16,128,2048]..................................... Unknown. I0423 17:44:47.163184 136085542016832 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[16,16,128,2048]..................................... (None, None, None, 'fsdp'). I0423 17:44:47.206294 136085542016832 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[2048,32000]......................................... Unknown. I0423 17:44:47.206377 136085542016832 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[2048,32000]......................................... ('fsdp', None). I0423 17:44:47.220957 136085542016832 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[32000,2048]......................................... Unknown. I0423 17:44:47.221018 136085542016832 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[32000,2048]......................................... (None, 'fsdp'). I0423 17:44:47.441261 136085542016832 nnx_decoders.py:616] nnx_decoders/carry Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0423 17:44:47.441355 136085542016832 nnx_decoders.py:616] nnx_decoders/carry Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 17:44:47.445256 136085542016832 nnx_decoders.py:616] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0423 17:44:47.445310 136085542016832 nnx_decoders.py:616] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 17:44:47.461472 136085542016832 attentions.py:1084] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 17:44:47.461538 136085542016832 attentions.py:1084] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 17:44:47.477197 136085542016832 attentions.py:1085] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 17:44:47.477255 136085542016832 attentions.py:1085] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 17:44:47.500781 136085542016832 attentions.py:1150] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 17:44:47.500843 136085542016832 attentions.py:1150] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 17:44:47.523748 136085542016832 attentions.py:1151] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 17:44:47.523847 136085542016832 attentions.py:1151] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 17:44:47.539786 136085542016832 attentions.py:1152] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 17:44:47.539847 136085542016832 attentions.py:1152] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 17:44:47.564925 136085542016832 attentions.py:1193] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0423 17:44:47.565002 136085542016832 attentions.py:1193] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 17:44:47.584677 136085542016832 linears.py:541] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0423 17:44:47.584737 136085542016832 linears.py:541] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0423 17:44:59.207670 136085542016832 max_utils.py:791] Total memory size: 1.7 GB, Output size: 0.4 GB, Temp size: 1.3 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB. I0423 17:44:59.210058 136085542016832 metric_logger.py:289] number parameters: 1.104 billion I0423 17:45:01.128002 136085542016832 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0423 17:45:11.307568 136085542016832 checkpointing.py:798] Waited 10.179551362991333 seconds for step 0 to finish before starting checkpointing. I0423 17:45:11.309995 136085542016832 checkpoint_manager.py:2013] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 17:45:11.311623 136085542016832 checkpoint_manager.py:1518] [process=5] Saving checkpoint at step 0 I0423 17:45:11.314372 136085542016832 async_checkpointer.py:452] [process=5] Started async saving checkpoint to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/nnx_xpk_feat_nnx_set_defaults_true_20260423_155242_06_grad_accum/checkpoints/0. I0423 17:45:11.898771 136085542016832 signaling_client.py:364] Using JaxDistributedSignalingClient I0423 17:45:11.899843 136085542016832 jax_array_handlers.py:358] Scheduling D2H of 69 prioritized jax.Array. I0423 17:45:11.899903 136085542016832 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False I0423 17:45:12.151289 136085542016832 base_pytree_checkpoint_handler.py:153] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.253627s I0423 17:45:12.151465 136085542016832 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.967 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.5199482440948486 s) (per-host) I0423 17:45:12.151522 136085542016832 base_pytree_checkpoint_handler.py:737] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.520015s (batch_requests_ready=0.259522s, total_serialization_initiated=0.260417s, others=0.000076s) I0423 17:45:12.151621 136085542016832 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.524094s (all_items=0.000020s, per_item={'items': '0.00002003'}, temp_paths=0.524074) I0423 17:45:12.152538 135962810111744 async_checkpointer.py:79] [process=5][thread=async_save] Background save thread started. I0423 17:45:12.152708 136085542016832 async_checkpointer.py:561] Finished blocking save. Time taken: 0.841000s. Continuing background save to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/nnx_xpk_feat_nnx_set_defaults_true_20260423_155242_06_grad_accum/checkpoints/0. I0423 17:45:12.219903 136085542016832 checkpoint_manager.py:1566] [process=5][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0423 17:45:12.220269 135959060408064 async_checkpointer.py:265] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0423 17:45:12.220433 136085542016832 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/nnx_xpk_feat_nnx_set_defaults_true_20260423_155242_06_grad_accum/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776966311.3099775, 'wait_for_prev_duration_secs': 6.270408630371094e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776966311.3116763, 'checkpointer_blocking_duration_secs': 0.8411386013031006, 'get_old_steps_start_time': 1776966312.1528347, 'get_old_steps_duration_secs': 2.5033950805664062e-05, 'checkpoint_manager_blocking_start_time': 1776966311.3079867, 'checkpoint_manager_blocking_duration_secs': 0.9124064445495605} I0423 17:45:12.220540 136085542016832 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0423 17:45:12.220611 136085542016832 max_utils.py:750] Memstats: After params initialized: I0423 17:45:12.220681 136085542016832 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_18(process=5,(2,4,0,0)) I0423 17:45:12.220717 136085542016832 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_19(process=5,(3,4,0,0)) I0423 17:45:12.220745 136085542016832 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_22(process=5,(2,5,0,0)) I0423 17:45:12.220769 136085542016832 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_23(process=5,(3,5,0,0)) I0423 17:45:12.487216 136085542016832 metric_logger.py:185] completed step: 0, seconds: 1.917, TFLOP/s/device: 28.352, Tokens/s/device: 4273.520, total_weights: 262144, loss: 10.876 I0423 17:45:13.083266 136085542016832 metric_logger.py:185] completed step: 1, seconds: 11.358, TFLOP/s/device: 4.785, Tokens/s/device: 721.279, total_weights: 262144, loss: 10.876 I0423 17:45:13.661933 136085542016832 metric_logger.py:185] completed step: 2, seconds: 0.019, TFLOP/s/device: 2858.793, Tokens/s/device: 430908.421, total_weights: 262144, loss: 10.561 I0423 17:45:14.240280 136085542016832 metric_logger.py:185] completed step: 3, seconds: 0.584, TFLOP/s/device: 93.056, Tokens/s/device: 14026.461, total_weights: 262144, loss: 10.270 I0423 17:45:15.293590 2426 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0423 17:45:15.398026 136085542016832 metric_logger.py:185] completed step: 4, seconds: 0.579, TFLOP/s/device: 93.848, Tokens/s/device: 14145.722, total_weights: 262144, loss: 10.021 I0423 17:45:15.406412 136085542016832 metric_logger.py:185] completed step: 5, seconds: 0.578, TFLOP/s/device: 94.036, Tokens/s/device: 14174.089, total_weights: 262144, loss: 9.819 I0423 17:45:17.611960 135962818504448 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/nnx_xpk_feat_nnx_set_defaults_true_20260423_155242_06_grad_accum/checkpoints/0/items/array_metadatas/process_5 I0423 17:45:50.187165 135962810111744 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/gbytes_per_sec: 40.969 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 38.55561089515686 s) (per-host) I0423 17:45:50.187273 135962810111744 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 38.034626s. I0423 17:45:53.936262 136085542016832 metric_logger.py:185] completed step: 6, seconds: 1.159, TFLOP/s/device: 46.881, Tokens/s/device: 7066.473, total_weights: 262144, loss: 9.666 I0423 17:45:54.514909 136085542016832 metric_logger.py:185] completed step: 7, seconds: 37.953, TFLOP/s/device: 1.432, Tokens/s/device: 215.846, total_weights: 262144, loss: 9.560 I0423 17:45:55.093241 136085542016832 metric_logger.py:185] completed step: 8, seconds: 0.584, TFLOP/s/device: 93.034, Tokens/s/device: 14023.099, total_weights: 262144, loss: 9.495 I0423 17:45:55.672775 136085542016832 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0423 17:45:55.673321 136085542016832 checkpointing.py:798] Waited 0.0005583763122558594 seconds for step 9 to finish before starting checkpointing. I0423 17:45:55.675424 136085542016832 checkpoint_manager.py:2024] [process=5][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 17:46:35.653807 135962810111744 async_checkpointer.py:144] [process=5][thread=async_save] Background save thread done. Time taken: 83.501145s. I0423 17:46:35.654109 135959060408064 async_checkpointer.py:273] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 17:46:35.654249 135959060408064 async_checkpointer.py:283] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0423 17:46:35.654306 135959060408064 checkpoint_manager.py:2133] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0423 17:46:35.656093 135959060408064 checkpoint_manager.py:2142] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0423 17:46:35.656196 136085542016832 checkpoint_manager.py:2036] [process=5][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0. W0423 17:46:35.656273 136085542016832 checkpoint_manager.py:1458] Waiting for previous save to complete took 39.980855 seconds. If this number is high, consider checkpointing less frequently. I0423 17:46:35.658805 136085542016832 checkpoint_manager.py:1518] [process=5] Saving checkpoint at step 9 I0423 17:46:35.662116 136085542016832 async_checkpointer.py:452] [process=5] Started async saving checkpoint to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/nnx_xpk_feat_nnx_set_defaults_true_20260423_155242_06_grad_accum/checkpoints/9. I0423 17:46:36.662388 136085542016832 jax_array_handlers.py:358] Scheduling D2H of 69 prioritized jax.Array. I0423 17:46:36.662489 136085542016832 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False I0423 17:46:36.708905 136085542016832 base_pytree_checkpoint_handler.py:153] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.048576s I0423 17:46:36.709073 136085542016832 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/blocking_gbytes_per_sec: 4.588 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.33618927001953125 s) (per-host) I0423 17:46:36.709125 136085542016832 base_pytree_checkpoint_handler.py:737] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.336252s (batch_requests_ready=0.283103s, total_serialization_initiated=0.053079s, others=0.000070s) I0423 17:46:36.709224 136085542016832 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.340258s (all_items=0.000016s, per_item={'items': '0.00001597'}, temp_paths=0.340242) I0423 17:46:36.710047 135958909404928 async_checkpointer.py:79] [process=5][thread=async_save] Background save thread started. I0423 17:46:36.710204 136085542016832 async_checkpointer.py:561] Finished blocking save. Time taken: 1.051328s. Continuing background save to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/nnx_xpk_feat_nnx_set_defaults_true_20260423_155242_06_grad_accum/checkpoints/9. I0423 17:46:37.121823 136085542016832 checkpoint_manager.py:1566] [process=5][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0423 17:46:37.122199 135959060408064 async_checkpointer.py:265] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0423 17:46:37.122375 136085542016832 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/nnx_xpk_feat_nnx_set_defaults_true_20260423_155242_06_grad_accum/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776966355.6753967, 'wait_for_prev_duration_secs': 39.9808554649353, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776966395.6588466, 'checkpointer_blocking_duration_secs': 1.0514652729034424, 'get_old_steps_start_time': 1776966396.710331, 'get_old_steps_duration_secs': 2.574920654296875e-05, 'checkpoint_manager_blocking_start_time': 1776966355.6735415, 'checkpoint_manager_blocking_duration_secs': 41.44879603385925} I0423 17:46:37.122486 136085542016832 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0423 17:46:37.122531 136085542016832 checkpoint_manager.py:2024] [process=5][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 17:46:41.444322 135962818504448 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/nnx_xpk_feat_nnx_set_defaults_true_20260423_155242_06_grad_accum/checkpoints/9/items/array_metadatas/process_5 I0423 17:47:19.138679 135958909404928 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/gbytes_per_sec: 36.936 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.765748023986816 s) (per-host) I0423 17:47:19.138780 135958909404928 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.428623s. I0423 17:47:25.523676 135958909404928 async_checkpointer.py:144] [process=5][thread=async_save] Background save thread done. Time taken: 48.813486s. I0423 17:47:25.523985 135959060408064 async_checkpointer.py:273] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 17:47:25.524105 135959060408064 async_checkpointer.py:283] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0423 17:47:25.524152 135959060408064 checkpoint_manager.py:2133] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0423 17:47:25.525771 135959060408064 checkpoint_manager.py:2142] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0423 17:47:25.525943 136085542016832 checkpoint_manager.py:2036] [process=5][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9. I0423 17:47:25.526112 136085542016832 checkpoint_manager.py:2013] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 17:47:25.526791 136085542016832 metric_logger.py:185] completed step: 9, seconds: 0.578, TFLOP/s/device: 94.000, Tokens/s/device: 14168.696, total_weights: 262144, loss: 9.457 Per train step: Total TFLOPs: 54.35 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Thu Apr 23 17:47:39 UTC 2026 EXIT_CODE=0