XPK Start: Fri Apr 24 16:42:00 UTC 2026 2026-04-24 16:42:04.671378: 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 00:00:1777048924.684362 10 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered E0000 00:00:1777048924.688125 10 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered W0000 00:00:1777048924.699470 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1777048924.699490 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1777048924.699492 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1777048924.699494 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. 2026-04-24 16:42:23.887251: 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) I0424 16:42:24.405503 137283945723712 max_utils.py:273] Attempting to initialize the jax distributed system... INFO:2026-04-24 16:42:33,445:jax._src.distributed:140: Starting JAX distributed service on [::]:8482 I0424 16:42:33.445971 137283945723712 distributed.py:140] Starting JAX distributed service on [::]:8482 INFO:2026-04-24 16:42:33,448:jax._src.distributed:157: Connecting to JAX distributed service on mt-06-grad-accum-bucwo-slice-job-0-0.mt-06-grad-accum-bucwo:8482 I0424 16:42:33.448208 137283945723712 distributed.py:157] Connecting to JAX distributed service on mt-06-grad-accum-bucwo-slice-job-0-0.mt-06-grad-accum-bucwo:8482 I0424 16:42:34.534737 137283945723712 max_utils.py:284] Jax distributed system initialized! I0424 16:42:41.386943 137283945723712 max_utils.py:800] System Information: Jax Version: 0.8.1 I0424 16:42:41.387047 137283945723712 max_utils.py:801] System Information: Jaxlib Version: 0.8.1 I0424 16:42:41.387087 137283945723712 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 I0424 16:42:41.387121 137283945723712 train_utils.py:377] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0424 16:42:42.004427 137283945723712 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0424 16:42:42.119244 137283945723712 checkpointing.py:688] Setting up checkpoint logger... I0424 16:42:42.119361 137283945723712 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0424 16:42:42.119405 137283945723712 pytree_checkpoint_handler.py:589] save_device_host_concurrent_bytes=None I0424 16:42:42.119613 137283945723712 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 0x7cdb52f78bf0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0424 16:42:45.357296 137283945723712 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0424 16:42:45.357531 137283945723712 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 0x7cc839f04ec0>}, handler_registry=None I0424 16:42:45.357779 137283945723712 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7cc839f04ec0>` 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`. I0424 16:42:45.357831 137283945723712 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7cc839f02fc0>` 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`. I0424 16:42:45.357867 137283945723712 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 0x7cc839f04ec0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7cc839f04ec0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7cc839f02fc0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7cc839f02fc0>}). I0424 16:42:45.358223 137283945723712 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.33 I0424 16:42:45.358302 137283945723712 async_checkpointer.py:177] [process=5][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7cc6e44d8f40> timeout: 600 secs and primary_host=0 for async checkpoint writes I0424 16:42:46.042843 137283945723712 checkpoint_manager.py:1818] Found 0 checkpoint steps in gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/nnx_xpk_feat_nnx_set_defaults_true_20260424_145744_06_grad_accum/checkpoints I0424 16:42:46.079233 137283945723712 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_20260424_145744/nnx_xpk_feat_nnx_set_defaults_true_20260424_145744_06_grad_accum/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7cc6e454eab0> I0424 16:42:46.079378 137283945723712 checkpointing.py:302] Checkpoint manager created! I0424 16:42:47.796512 137283945723712 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0424 16:42:47.796627 137283945723712 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0424 16:42:49.179874 137283945723712 maxtext_utils.py:1749] decoder/decoder_norm/scale/value Shape: float32[2048] Physical: (None,) I0424 16:42:49.179996 137283945723712 maxtext_utils.py:1749] decoder/layers/mlp/wi_0/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0424 16:42:49.180050 137283945723712 maxtext_utils.py:1749] decoder/layers/mlp/wi_1/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0424 16:42:49.180094 137283945723712 maxtext_utils.py:1749] decoder/layers/mlp/wo/kernel/value Shape: float32[7168,16,2048] Physical: (None, None, 'fsdp') I0424 16:42:49.180132 137283945723712 maxtext_utils.py:1749] decoder/layers/post_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0424 16:42:49.180166 137283945723712 maxtext_utils.py:1749] decoder/layers/pre_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0424 16:42:49.180208 137283945723712 maxtext_utils.py:1749] decoder/layers/self_attention/key/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0424 16:42:49.180247 137283945723712 maxtext_utils.py:1749] decoder/layers/self_attention/out/kernel/value Shape: float32[16,16,128,2048] Physical: (None, None, None, 'fsdp') I0424 16:42:49.180282 137283945723712 maxtext_utils.py:1749] decoder/layers/self_attention/query/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0424 16:42:49.180317 137283945723712 maxtext_utils.py:1749] decoder/layers/self_attention/value/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0424 16:42:49.180353 137283945723712 maxtext_utils.py:1749] decoder/logits_dense/kernel/value Shape: float32[2048,32000] Physical: ('fsdp', None) I0424 16:42:49.180389 137283945723712 maxtext_utils.py:1749] token_embedder/embedding/value Shape: float32[32000,2048] Physical: (None, 'fsdp') I0424 16:42:49.559616 137283945723712 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[2048]............................................... Unknown. I0424 16:42:49.559718 137283945723712 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[2048]............................................... (None,). I0424 16:42:49.573946 137283945723712 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[2048,16,7168]....................................... Unknown. I0424 16:42:49.574008 137283945723712 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[2048,16,7168]....................................... ('fsdp', None, None). I0424 16:42:49.602206 137283945723712 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[7168,16,2048]....................................... Unknown. I0424 16:42:49.602271 137283945723712 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[7168,16,2048]....................................... (None, None, 'fsdp'). I0424 16:42:49.616452 137283945723712 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[2048,16]............................................ Unknown. I0424 16:42:49.616508 137283945723712 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[2048,16]............................................ (None, None). I0424 16:42:49.644813 137283945723712 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[2048,16,16,128]..................................... Unknown. I0424 16:42:49.644876 137283945723712 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[2048,16,16,128]..................................... ('fsdp', None, None, None). I0424 16:42:49.659003 137283945723712 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[16,16,128,2048]..................................... Unknown. I0424 16:42:49.659065 137283945723712 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[16,16,128,2048]..................................... (None, None, None, 'fsdp'). I0424 16:42:49.701597 137283945723712 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[2048,32000]......................................... Unknown. I0424 16:42:49.701677 137283945723712 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[2048,32000]......................................... ('fsdp', None). I0424 16:42:49.715830 137283945723712 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[32000,2048]......................................... Unknown. I0424 16:42:49.715888 137283945723712 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[32000,2048]......................................... (None, 'fsdp'). I0424 16:42:49.933918 137283945723712 nnx_decoders.py:616] nnx_decoders/carry Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0424 16:42:49.934010 137283945723712 nnx_decoders.py:616] nnx_decoders/carry Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0424 16:42:49.937960 137283945723712 nnx_decoders.py:616] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0424 16:42:49.938016 137283945723712 nnx_decoders.py:616] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0424 16:42:49.954170 137283945723712 attentions.py:1084] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0424 16:42:49.954234 137283945723712 attentions.py:1084] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0424 16:42:49.969807 137283945723712 attentions.py:1085] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0424 16:42:49.969862 137283945723712 attentions.py:1085] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0424 16:42:49.993481 137283945723712 attentions.py:1150] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0424 16:42:49.993550 137283945723712 attentions.py:1150] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 16:42:50.009371 137283945723712 attentions.py:1151] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0424 16:42:50.009432 137283945723712 attentions.py:1151] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 16:42:50.025186 137283945723712 attentions.py:1152] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0424 16:42:50.025242 137283945723712 attentions.py:1152] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 16:42:50.050322 137283945723712 attentions.py:1193] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0424 16:42:50.050391 137283945723712 attentions.py:1193] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 16:42:50.069925 137283945723712 linears.py:541] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0424 16:42:50.069998 137283945723712 linears.py:541] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0424 16:43:01.456290 137283945723712 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. I0424 16:43:01.458764 137283945723712 metric_logger.py:289] number parameters: 1.104 billion I0424 16:43:03.359477 137283945723712 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0424 16:43:13.457035 137283945723712 checkpointing.py:798] Waited 10.09754467010498 seconds for step 0 to finish before starting checkpointing. I0424 16:43:13.459517 137283945723712 checkpoint_manager.py:2013] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0424 16:43:13.461194 137283945723712 checkpoint_manager.py:1518] [process=5] Saving checkpoint at step 0 I0424 16:43:13.464066 137283945723712 async_checkpointer.py:452] [process=5] Started async saving checkpoint to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/nnx_xpk_feat_nnx_set_defaults_true_20260424_145744_06_grad_accum/checkpoints/0. I0424 16:43:14.169606 137283945723712 signaling_client.py:364] Using JaxDistributedSignalingClient I0424 16:43:14.170697 137283945723712 jax_array_handlers.py:358] Scheduling D2H of 69 prioritized jax.Array. I0424 16:43:14.170758 137283945723712 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 I0424 16:43:14.410756 137283945723712 base_pytree_checkpoint_handler.py:153] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.242280s I0424 16:43:14.410932 137283945723712 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.918 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.5285944938659668 s) (per-host) I0424 16:43:14.410990 137283945723712 base_pytree_checkpoint_handler.py:737] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.528661s (batch_requests_ready=0.279424s, total_serialization_initiated=0.249163s, others=0.000075s) I0424 16:43:14.411091 137283945723712 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.532902s (all_items=0.000021s, per_item={'items': '0.00002050'}, temp_paths=0.532881) I0424 16:43:14.412066 137161072416512 async_checkpointer.py:79] [process=5][thread=async_save] Background save thread started. I0424 16:43:14.412243 137283945723712 async_checkpointer.py:561] Finished blocking save. Time taken: 0.950978s. Continuing background save to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/nnx_xpk_feat_nnx_set_defaults_true_20260424_145744_06_grad_accum/checkpoints/0. I0424 16:43:14.431601 137283945723712 checkpoint_manager.py:1566] [process=5][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0424 16:43:14.431941 137156249011968 async_checkpointer.py:265] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0424 16:43:14.432103 137283945723712 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/nnx_xpk_feat_nnx_set_defaults_true_20260424_145744_06_grad_accum/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777048993.4594994, 'wait_for_prev_duration_secs': 6.341934204101562e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777048993.4612322, 'checkpointer_blocking_duration_secs': 0.9511175155639648, 'get_old_steps_start_time': 1777048994.41237, 'get_old_steps_duration_secs': 2.574920654296875e-05, 'checkpoint_manager_blocking_start_time': 1777048993.4574406, 'checkpoint_manager_blocking_duration_secs': 0.9746236801147461} I0424 16:43:14.432213 137283945723712 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0424 16:43:14.432284 137283945723712 max_utils.py:750] Memstats: After params initialized: I0424 16:43:14.432336 137283945723712 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_18(process=5,(2,4,0,0)) I0424 16:43:14.432373 137283945723712 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_19(process=5,(3,4,0,0)) I0424 16:43:14.432401 137283945723712 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_22(process=5,(2,5,0,0)) I0424 16:43:14.432426 137283945723712 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_23(process=5,(3,5,0,0)) I0424 16:43:14.700440 137283945723712 metric_logger.py:185] completed step: 0, seconds: 1.900, TFLOP/s/device: 28.610, Tokens/s/device: 4312.416, total_weights: 262144, loss: 10.876 I0424 16:43:15.303495 137283945723712 metric_logger.py:185] completed step: 1, seconds: 11.339, TFLOP/s/device: 4.793, Tokens/s/device: 722.435, total_weights: 262144, loss: 10.876 I0424 16:43:15.882029 137283945723712 metric_logger.py:185] completed step: 2, seconds: 0.026, TFLOP/s/device: 2073.817, Tokens/s/device: 312588.240, total_weights: 262144, loss: 10.561 I0424 16:43:16.460256 137283945723712 metric_logger.py:185] completed step: 3, seconds: 0.584, TFLOP/s/device: 93.056, Tokens/s/device: 14026.437, total_weights: 262144, loss: 10.270 I0424 16:43:17.130955 2445 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0424 16:43:17.617983 137283945723712 metric_logger.py:185] completed step: 4, seconds: 0.579, TFLOP/s/device: 93.898, Tokens/s/device: 14153.274, total_weights: 262144, loss: 10.021 I0424 16:43:17.624806 137283945723712 metric_logger.py:185] completed step: 5, seconds: 0.578, TFLOP/s/device: 93.971, Tokens/s/device: 14164.384, total_weights: 262144, loss: 9.819 I0424 16:43:19.066781 137161080809216 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_20260424_145744/nnx_xpk_feat_nnx_set_defaults_true_20260424_145744_06_grad_accum/checkpoints/0/items/array_metadatas/process_5 I0424 16:43:52.049382 137161072416512 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/gbytes_per_sec: 41.386 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 38.16701936721802 s) (per-host) I0424 16:43:52.049486 137161072416512 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 37.637308s. I0424 16:43:55.665237 137283945723712 metric_logger.py:185] completed step: 6, seconds: 1.158, TFLOP/s/device: 46.950, Tokens/s/device: 7076.796, total_weights: 262144, loss: 9.666 I0424 16:43:56.243344 137283945723712 metric_logger.py:185] completed step: 7, seconds: 37.463, TFLOP/s/device: 1.451, Tokens/s/device: 218.669, total_weights: 262144, loss: 9.560 I0424 16:43:56.821880 137283945723712 metric_logger.py:185] completed step: 8, seconds: 0.584, TFLOP/s/device: 92.988, Tokens/s/device: 14016.117, total_weights: 262144, loss: 9.495 I0424 16:43:57.401336 137283945723712 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0424 16:43:57.401953 137283945723712 checkpointing.py:798] Waited 0.000629425048828125 seconds for step 9 to finish before starting checkpointing. I0424 16:43:57.404033 137283945723712 checkpoint_manager.py:2024] [process=5][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0424 16:44:34.655529 137161072416512 async_checkpointer.py:144] [process=5][thread=async_save] Background save thread done. Time taken: 80.243334s. I0424 16:44:34.655802 137156249011968 async_checkpointer.py:273] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0424 16:44:34.655859 137156249011968 async_checkpointer.py:283] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0424 16:44:34.655908 137156249011968 checkpoint_manager.py:2133] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0424 16:44:34.657496 137156249011968 checkpoint_manager.py:2142] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0424 16:44:34.657665 137283945723712 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. W0424 16:44:34.657734 137283945723712 checkpoint_manager.py:1458] Waiting for previous save to complete took 37.253711 seconds. If this number is high, consider checkpointing less frequently. I0424 16:44:34.660185 137283945723712 checkpoint_manager.py:1518] [process=5] Saving checkpoint at step 9 I0424 16:44:34.663513 137283945723712 async_checkpointer.py:452] [process=5] Started async saving checkpoint to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/nnx_xpk_feat_nnx_set_defaults_true_20260424_145744_06_grad_accum/checkpoints/9. I0424 16:44:35.596766 137283945723712 jax_array_handlers.py:358] Scheduling D2H of 69 prioritized jax.Array. I0424 16:44:35.596863 137283945723712 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 I0424 16:44:35.641695 137283945723712 base_pytree_checkpoint_handler.py:153] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.047163s I0424 16:44:35.641871 137283945723712 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.238 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.6893126964569092 s) (per-host) I0424 16:44:35.641925 137283945723712 base_pytree_checkpoint_handler.py:737] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.689377s (batch_requests_ready=0.637601s, total_serialization_initiated=0.051703s, others=0.000073s) I0424 16:44:35.642026 137283945723712 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.694314s (all_items=0.000016s, per_item={'items': '0.00001597'}, temp_paths=0.694298) I0424 16:44:35.642970 137155703707392 async_checkpointer.py:79] [process=5][thread=async_save] Background save thread started. I0424 16:44:35.643127 137283945723712 async_checkpointer.py:561] Finished blocking save. Time taken: 0.982873s. Continuing background save to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/nnx_xpk_feat_nnx_set_defaults_true_20260424_145744_06_grad_accum/checkpoints/9. I0424 16:44:35.645045 137283945723712 checkpoint_manager.py:1566] [process=5][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0424 16:44:35.645336 137156249011968 async_checkpointer.py:265] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0424 16:44:35.645472 137283945723712 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/nnx_xpk_feat_nnx_set_defaults_true_20260424_145744_06_grad_accum/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777049037.404005, 'wait_for_prev_duration_secs': 37.253711223602295, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777049074.6602237, 'checkpointer_blocking_duration_secs': 0.9830117225646973, 'get_old_steps_start_time': 1777049075.643255, 'get_old_steps_duration_secs': 2.5033950805664062e-05, 'checkpoint_manager_blocking_start_time': 1777049037.402177, 'checkpoint_manager_blocking_duration_secs': 38.24326157569885} I0424 16:44:35.645634 137283945723712 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0424 16:44:35.645691 137283945723712 checkpoint_manager.py:2024] [process=5][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0424 16:44:40.031698 137155737278208 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_20260424_145744/nnx_xpk_feat_nnx_set_defaults_true_20260424_145744_06_grad_accum/checkpoints/9/items/array_metadatas/process_5 I0424 16:45:17.123580 137155703707392 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/gbytes_per_sec: 37.457 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.17098307609558 s) (per-host) I0424 16:45:17.123713 137155703707392 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.480635s. I0424 16:45:23.044277 137155703707392 async_checkpointer.py:144] [process=5][thread=async_save] Background save thread done. Time taken: 47.401184s. I0424 16:45:23.044568 137156249011968 async_checkpointer.py:273] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0424 16:45:23.044723 137156249011968 async_checkpointer.py:283] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0424 16:45:23.044786 137156249011968 checkpoint_manager.py:2133] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0424 16:45:23.046299 137156249011968 checkpoint_manager.py:2142] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0424 16:45:23.046497 137283945723712 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. I0424 16:45:23.046676 137283945723712 checkpoint_manager.py:2013] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0424 16:45:23.047338 137283945723712 metric_logger.py:185] completed step: 9, seconds: 0.578, TFLOP/s/device: 94.067, Tokens/s/device: 14178.824, 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: Fri Apr 24 16:45:35 UTC 2026 EXIT_CODE=0