feat/nnx-set-defaults-trueXPK Start: Sun Apr 19 03:53:38 UTC 2026 2026-04-19 03:53:42.491712: 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 00:00:1776570822.504365 10 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered E0000 00:00:1776570822.508023 10 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered W0000 00:00:1776570822.519261 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776570822.519280 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776570822.519283 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776570822.519285 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. 2026-04-19 03:54:01.660698: 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 03:54:02.187041 134995663525696 max_utils.py:273] Attempting to initialize the jax distributed system... INFO:2026-04-19 03:54:11,226:jax._src.distributed:140: Starting JAX distributed service on [::]:8482 I0419 03:54:11.226190 134995663525696 distributed.py:140] Starting JAX distributed service on [::]:8482 INFO:2026-04-19 03:54:11,228:jax._src.distributed:157: Connecting to JAX distributed service on mt-10-shardy-false-aybxq-slice-job-0-0.mt-10-shardy-false-aybxq:8482 I0419 03:54:11.228576 134995663525696 distributed.py:157] Connecting to JAX distributed service on mt-10-shardy-false-aybxq-slice-job-0-0.mt-10-shardy-false-aybxq:8482 I0419 03:54:13.060941 134995663525696 max_utils.py:284] Jax distributed system initialized! I0419 03:54:19.953674 134995663525696 max_utils.py:800] System Information: Jax Version: 0.8.1 I0419 03:54:19.953783 134995663525696 max_utils.py:801] System Information: Jaxlib Version: 0.8.1 I0419 03:54:19.953823 134995663525696 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 03:54:19.953855 134995663525696 train_utils.py:377] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0419 03:54:20.579356 134995663525696 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0419 03:54:20.579952 134995663525696 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0419 03:54:20.580132 134995663525696 checkpointing.py:688] Setting up checkpoint logger... I0419 03:54:20.580183 134995663525696 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0419 03:54:20.580226 134995663525696 pytree_checkpoint_handler.py:589] save_device_host_concurrent_bytes=None I0419 03:54:20.580583 134995663525696 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 0x7ac6a1b79250>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0419 03:54:24.634653 134995663525696 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0419 03:54:24.634890 134995663525696 checkpoint_manager.py:709] [process=6][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ab37e3196d0>}, handler_registry=None I0419 03:54:24.635125 134995663525696 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ab37e3196d0>` 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 03:54:24.635174 134995663525696 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ab37e31e810>` 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 03:54:24.635212 134995663525696 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 0x7ab37e3196d0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ab37e3196d0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ab37e31e810>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ab37e31e810>}). I0419 03:54:24.635719 134995663525696 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.33 I0419 03:54:24.635797 134995663525696 async_checkpointer.py:177] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7ab33c3a8180> timeout: 600 secs and primary_host=0 for async checkpoint writes I0419 03:54:27.094284 134995663525696 checkpoint_manager.py:1818] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints I0419 03:54:27.098503 134995663525696 checkpoint_manager.py:929] [process=6][thread=MainThread] CheckpointManager created, primary_host=0, CheckpointManagerOptions=CheckpointManagerOptions(save_interval_steps=1, max_to_keep=None, keep_time_interval=None, keep_period=None, should_keep_fn=None, best_fn=None, best_mode='max', keep_checkpoints_without_metrics=True, step_prefix=None, step_format_fixed_length=None, step_name_format=None, create=True, cleanup_tmp_directories=False, save_on_steps=frozenset(), single_host_load_and_broadcast=False, todelete_subdir=None, todelete_full_path=None, enable_background_delete=False, read_only=False, enable_async_checkpointing=True, async_options=None, multiprocessing_options=MultiprocessingOptions(primary_host=0, active_processes=None, barrier_sync_key_prefix=None), should_save_fn=None, file_options=FileOptions(path_permission_mode=None), save_root_metadata=True, temporary_path_class=None, save_decision_policy=FixedIntervalPolicy(interval=10), preservation_policy=LatestN(n=None), prevent_write_metrics=False, enable_should_save_is_saving_in_progress_check=True, enable_per_process_directory_creation=False, lightweight_initialize=False), root_directory=gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7ab37e31a9f0> I0419 03:54:27.098621 134995663525696 checkpointing.py:302] Checkpoint manager created! I0419 03:54:27.993580 134995663525696 nnx_wrappers.py:455] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0419 03:54:27.993685 134995663525696 nnx_wrappers.py:455] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0419 03:54:28.366987 134995663525696 attentions.py:1084] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0419 03:54:28.367088 134995663525696 attentions.py:1084] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0419 03:54:28.383156 134995663525696 attentions.py:1085] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0419 03:54:28.383216 134995663525696 attentions.py:1085] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0419 03:54:28.405959 134995663525696 attentions.py:1150] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0419 03:54:28.406027 134995663525696 attentions.py:1150] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0419 03:54:28.421770 134995663525696 attentions.py:1151] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0419 03:54:28.421834 134995663525696 attentions.py:1151] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0419 03:54:28.437510 134995663525696 attentions.py:1152] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0419 03:54:28.437576 134995663525696 attentions.py:1152] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0419 03:54:28.462278 134995663525696 attentions.py:1193] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0419 03:54:28.462347 134995663525696 attentions.py:1193] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0419 03:54:28.481674 134995663525696 linears.py:541] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0419 03:54:28.481739 134995663525696 linears.py:541] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0419 03:54:28.670149 134995663525696 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0419 03:54:28.670272 134995663525696 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0419 03:54:30.091887 134995663525696 maxtext_utils.py:1740] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: PartitionSpec('norm',) Physical: (None,) I0419 03:54:30.092022 134995663525696 maxtext_utils.py:1740] params/params/decoder/layers/mlp/wi_0/kernel Shape: float32[2048,16,7168] Logical: PartitionSpec('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0419 03:54:30.092082 134995663525696 maxtext_utils.py:1740] params/params/decoder/layers/mlp/wi_1/kernel Shape: float32[2048,16,7168] Logical: PartitionSpec('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0419 03:54:30.092141 134995663525696 maxtext_utils.py:1740] params/params/decoder/layers/mlp/wo/kernel Shape: float32[7168,16,2048] Logical: PartitionSpec('mlp', 'layers', 'embed') Physical: (None, None, 'fsdp') I0419 03:54:30.092194 134995663525696 maxtext_utils.py:1740] params/params/decoder/layers/post_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: PartitionSpec('norm', 'layers') Physical: (None, None) I0419 03:54:30.092247 134995663525696 maxtext_utils.py:1740] params/params/decoder/layers/pre_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: PartitionSpec('norm', 'layers') Physical: (None, None) I0419 03:54:30.092305 134995663525696 maxtext_utils.py:1740] 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 03:54:30.092363 134995663525696 maxtext_utils.py:1740] 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 03:54:30.092405 134995663525696 maxtext_utils.py:1740] 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 03:54:30.092441 134995663525696 maxtext_utils.py:1740] 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 03:54:30.092489 134995663525696 maxtext_utils.py:1740] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: PartitionSpec('embed', 'vocab') Physical: ('fsdp', None) I0419 03:54:30.092539 134995663525696 maxtext_utils.py:1740] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: PartitionSpec('vocab', 'embed') Physical: (None, 'fsdp') I0419 03:54:30.592093 134995663525696 train.py:158] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0419 03:54:30.592187 134995663525696 train.py:158] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0419 03:54:30.607172 134995663525696 train.py:165] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0419 03:54:30.607247 134995663525696 train.py:165] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0419 03:54:41.246995 134995663525696 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 03:54:41.247856 134995663525696 metric_logger.py:289] number parameters: 1.104 billion I0419 03:54:52.350228 134995663525696 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0419 03:54:52.507860 134995663525696 checkpointing.py:798] Waited 0.15761375427246094 seconds for step 0 to finish before starting checkpointing. I0419 03:54:52.510411 134995663525696 checkpoint_manager.py:2013] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0419 03:54:52.512080 134995663525696 checkpoint_manager.py:1518] [process=6] Saving checkpoint at step 0 I0419 03:54:52.514806 134995663525696 async_checkpointer.py:452] [process=6] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints/0. I0419 03:54:53.506943 134995663525696 signaling_client.py:364] Using JaxDistributedSignalingClient I0419 03:54:53.508136 134995663525696 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array. I0419 03:54:53.508195 134995663525696 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 03:54:53.758790 134995663525696 base_pytree_checkpoint_handler.py:153] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.251930s I0419 03:54:53.758960 134995663525696 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/blocking_gbytes_per_sec: 3.042 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.5070748329162598 s) (per-host) I0419 03:54:53.759011 134995663525696 base_pytree_checkpoint_handler.py:737] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.507134s (batch_requests_ready=0.251547s, total_serialization_initiated=0.255520s, others=0.000067s) I0419 03:54:53.759100 134995663525696 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.511336s (all_items=0.000019s, per_item={'items': '0.00001931'}, temp_paths=0.511317) I0419 03:54:53.760034 134872702117632 async_checkpointer.py:79] [process=6][thread=async_save] Background save thread started. I0419 03:54:53.760204 134995663525696 async_checkpointer.py:561] Finished blocking save. Time taken: 1.248053s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints/0. I0419 03:54:54.618680 134995663525696 checkpoint_manager.py:1566] [process=6][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0419 03:54:54.619070 134867878672128 async_checkpointer.py:265] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0419 03:54:54.619251 134995663525696 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776570892.5103946, 'wait_for_prev_duration_secs': 6.4849853515625e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776570892.512119, 'checkpointer_blocking_duration_secs': 1.2482068538665771, 'get_old_steps_start_time': 1776570893.760348, 'get_old_steps_duration_secs': 2.5272369384765625e-05, 'checkpoint_manager_blocking_start_time': 1776570892.5084581, 'checkpoint_manager_blocking_duration_secs': 2.11073899269104} I0419 03:54:54.619359 134995663525696 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0419 03:54:54.619411 134995663525696 max_utils.py:750] Memstats: After params initialized: I0419 03:54:54.619467 134995663525696 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0)) I0419 03:54:54.619503 134995663525696 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0)) I0419 03:54:54.619536 134995663525696 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0)) I0419 03:54:54.619563 134995663525696 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0)) I0419 03:54:54.882458 134995663525696 metric_logger.py:185] completed step: 0, seconds: 11.102, TFLOP/s/device: 1.224, Tokens/s/device: 184.467, total_weights: 65536, loss: 10.874 I0419 03:54:55.063828 134995663525696 metric_logger.py:185] completed step: 1, seconds: 2.531, TFLOP/s/device: 5.368, Tokens/s/device: 809.196, total_weights: 65536, loss: 10.874 I0419 03:54:55.859093 134995663525696 metric_logger.py:185] completed step: 2, seconds: 0.034, TFLOP/s/device: 397.087, Tokens/s/device: 59853.289, total_weights: 65536, loss: 10.263 I0419 03:54:56.006720 134995663525696 metric_logger.py:185] completed step: 3, seconds: 0.796, TFLOP/s/device: 17.074, Tokens/s/device: 2573.550, total_weights: 65536, loss: 9.734 I0419 03:54:56.302023 134995663525696 metric_logger.py:185] completed step: 4, seconds: 0.153, TFLOP/s/device: 89.035, Tokens/s/device: 13420.356, total_weights: 65536, loss: 9.278 I0419 03:54:56.307708 134995663525696 metric_logger.py:185] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.214, Tokens/s/device: 13899.446, total_weights: 65536, loss: 8.892 I0419 03:55:17.329708 134995663525696 metric_logger.py:185] completed step: 6, seconds: 0.296, TFLOP/s/device: 45.930, Tokens/s/device: 6923.035, total_weights: 65536, loss: 8.592 I0419 03:55:17.477285 134995663525696 metric_logger.py:185] completed step: 7, seconds: 20.876, TFLOP/s/device: 0.651, Tokens/s/device: 98.105, total_weights: 65536, loss: 8.384 I0419 03:55:17.624789 134995663525696 metric_logger.py:185] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.539, Tokens/s/device: 13496.237, total_weights: 65536, loss: 8.255 I0419 03:55:17.771954 134995663525696 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0419 03:55:17.772646 134995663525696 checkpointing.py:798] Waited 0.0007131099700927734 seconds for step 9 to finish before starting checkpointing. I0419 03:55:17.774527 134995663525696 checkpoint_manager.py:2024] [process=6][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0419 03:55:18.590979 2622 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0419 03:55:21.177212 134872710510336 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints/0/items/array_metadatas/process_6 I0419 03:55:50.934852 134872702117632 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/gbytes_per_sec: 27.384 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 57.682924032211304 s) (per-host) I0419 03:55:50.934976 134872702117632 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 57.174831s. I0419 03:56:01.503636 134872702117632 async_checkpointer.py:144] [process=6][thread=async_save] Background save thread done. Time taken: 67.743475s. I0419 03:56:01.503868 134867878672128 async_checkpointer.py:273] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0419 03:56:01.503929 134867878672128 async_checkpointer.py:283] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0419 03:56:01.503981 134867878672128 checkpoint_manager.py:2133] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0419 03:56:01.505697 134867878672128 checkpoint_manager.py:2142] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0419 03:56:01.505865 134995663525696 checkpoint_manager.py:2036] [process=6][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0. W0419 03:56:01.506011 134995663525696 checkpoint_manager.py:1458] Waiting for previous save to complete took 43.731487 seconds. If this number is high, consider checkpointing less frequently. I0419 03:56:01.507746 134995663525696 checkpoint_manager.py:1518] [process=6] Saving checkpoint at step 9 I0419 03:56:01.511144 134995663525696 async_checkpointer.py:452] [process=6] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints/9. I0419 03:56:03.341085 134995663525696 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array. I0419 03:56:03.341182 134995663525696 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 03:56:03.390259 134995663525696 base_pytree_checkpoint_handler.py:153] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.050360s I0419 03:56:03.390451 134995663525696 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.079 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.7420163154602051 s) (per-host) I0419 03:56:03.390524 134995663525696 base_pytree_checkpoint_handler.py:737] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.742103s (batch_requests_ready=0.689782s, total_serialization_initiated=0.052223s, others=0.000098s) I0419 03:56:03.390633 134995663525696 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.746057s (all_items=0.000016s, per_item={'items': '0.00001574'}, temp_paths=0.746042) I0419 03:56:03.391520 134869973694208 async_checkpointer.py:79] [process=6][thread=async_save] Background save thread started. I0419 03:56:03.391676 134995663525696 async_checkpointer.py:561] Finished blocking save. Time taken: 1.883858s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints/9. I0419 03:56:03.394783 134995663525696 checkpoint_manager.py:1566] [process=6][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0419 03:56:03.395067 134867878672128 async_checkpointer.py:265] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0419 03:56:03.395241 134995663525696 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776570917.7745001, 'wait_for_prev_duration_secs': 43.73148703575134, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776570961.507786, 'checkpointer_blocking_duration_secs': 1.8839983940124512, 'get_old_steps_start_time': 1776570963.3918045, 'get_old_steps_duration_secs': 2.6226043701171875e-05, 'checkpoint_manager_blocking_start_time': 1776570917.7728758, 'checkpoint_manager_blocking_duration_secs': 45.62231755256653} I0419 03:56:03.395343 134995663525696 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0419 03:56:03.395387 134995663525696 checkpoint_manager.py:2024] [process=6][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0419 03:56:09.716909 134872710510336 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints/9/items/array_metadatas/process_6 I0419 03:56:46.435780 134869973694208 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/gbytes_per_sec: 36.074 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 43.787309885025024 s) (per-host) I0419 03:56:46.435896 134869973694208 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 43.044266s. I0419 03:56:53.950583 134869973694208 async_checkpointer.py:144] [process=6][thread=async_save] Background save thread done. Time taken: 50.558937s. I0419 03:56:53.950870 134867878672128 async_checkpointer.py:273] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0419 03:56:53.950997 134867878672128 async_checkpointer.py:283] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0419 03:56:53.951042 134867878672128 checkpoint_manager.py:2133] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0419 03:56:53.952372 134867878672128 checkpoint_manager.py:2142] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0419 03:56:53.952547 134995663525696 checkpoint_manager.py:2036] [process=6][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9. I0419 03:56:53.952683 134995663525696 checkpoint_manager.py:2013] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0419 03:56:53.953324 134995663525696 metric_logger.py:185] completed step: 9, seconds: 0.148, TFLOP/s/device: 92.106, Tokens/s/device: 13883.240, 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 03:57:04 UTC 2026 EXIT_CODE=0
XPK Start: Sun Apr 19 05:31:03 UTC 2026 2026-04-19 05:31:07.746390: 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 00:00:1776576667.759591 10 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered E0000 00:00:1776576667.763330 10 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered W0000 00:00:1776576667.774663 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776576667.774681 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776576667.774683 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776576667.774685 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. 2026-04-19 05:31:26.888650: 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 05:31:27.417913 135160546879296 max_utils.py:273] Attempting to initialize the jax distributed system... INFO:2026-04-19 05:31:36,459:jax._src.distributed:140: Starting JAX distributed service on [::]:8482 I0419 05:31:36.459800 135160546879296 distributed.py:140] Starting JAX distributed service on [::]:8482 INFO:2026-04-19 05:31:36,462:jax._src.distributed:157: Connecting to JAX distributed service on mt-10-shardy-false-cy4wg-slice-job-0-0.mt-10-shardy-false-cy4wg:8482 I0419 05:31:36.462196 135160546879296 distributed.py:157] Connecting to JAX distributed service on mt-10-shardy-false-cy4wg-slice-job-0-0.mt-10-shardy-false-cy4wg:8482 I0419 05:31:38.159269 135160546879296 max_utils.py:284] Jax distributed system initialized! I0419 05:31:43.980872 135160546879296 max_utils.py:800] System Information: Jax Version: 0.8.1 I0419 05:31:43.980981 135160546879296 max_utils.py:801] System Information: Jaxlib Version: 0.8.1 I0419 05:31:43.981022 135160546879296 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 05:31:43.981058 135160546879296 train_utils.py:377] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0419 05:31:44.587439 135160546879296 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0419 05:31:44.701460 135160546879296 checkpointing.py:688] Setting up checkpoint logger... I0419 05:31:44.701582 135160546879296 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0419 05:31:44.701626 135160546879296 pytree_checkpoint_handler.py:589] save_device_host_concurrent_bytes=None I0419 05:31:44.701835 135160546879296 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 0x7aed16f75280>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0419 05:31:48.540795 135160546879296 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0419 05:31:48.541049 135160546879296 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 0x7adaa08b2a20>}, handler_registry=None I0419 05:31:48.541291 135160546879296 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7adaa08b2a20>` 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 05:31:48.541340 135160546879296 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7adaa08b1af0>` 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 05:31:48.541375 135160546879296 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 0x7adaa08b2a20>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7adaa08b2a20>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7adaa08b1af0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7adaa08b1af0>}). I0419 05:31:48.541718 135160546879296 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.33 I0419 05:31:48.541796 135160546879296 async_checkpointer.py:177] [process=0][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7ad9ebe38f40> timeout: 600 secs and primary_host=0 for async checkpoint writes I0419 05:31:50.073566 135160546879296 checkpoint_manager.py:1818] Found 0 checkpoint steps in gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/nnx_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints I0419 05:31:50.215395 135160546879296 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/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/nnx_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7ad9ebe97200> I0419 05:31:50.215572 135160546879296 checkpointing.py:302] Checkpoint manager created! I0419 05:31:51.134054 135160546879296 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0419 05:31:51.134181 135160546879296 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0419 05:31:52.501378 135160546879296 maxtext_utils.py:1749] decoder/decoder_norm/scale/value Shape: float32[2048] Physical: (None,) I0419 05:31:52.501499 135160546879296 maxtext_utils.py:1749] decoder/layers/mlp/wi_0/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0419 05:31:52.501554 135160546879296 maxtext_utils.py:1749] decoder/layers/mlp/wi_1/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0419 05:31:52.501599 135160546879296 maxtext_utils.py:1749] decoder/layers/mlp/wo/kernel/value Shape: float32[7168,16,2048] Physical: (None, None, 'fsdp') I0419 05:31:52.501636 135160546879296 maxtext_utils.py:1749] decoder/layers/post_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0419 05:31:52.501671 135160546879296 maxtext_utils.py:1749] decoder/layers/pre_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0419 05:31:52.501709 135160546879296 maxtext_utils.py:1749] decoder/layers/self_attention/key/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0419 05:31:52.501745 135160546879296 maxtext_utils.py:1749] decoder/layers/self_attention/out/kernel/value Shape: float32[16,16,128,2048] Physical: (None, None, None, 'fsdp') I0419 05:31:52.501781 135160546879296 maxtext_utils.py:1749] decoder/layers/self_attention/query/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0419 05:31:52.501827 135160546879296 maxtext_utils.py:1749] decoder/layers/self_attention/value/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0419 05:31:52.501863 135160546879296 maxtext_utils.py:1749] decoder/logits_dense/kernel/value Shape: float32[2048,32000] Physical: ('fsdp', None) I0419 05:31:52.501897 135160546879296 maxtext_utils.py:1749] token_embedder/embedding/value Shape: float32[32000,2048] Physical: (None, 'fsdp') I0419 05:31:52.899756 135160546879296 nnx_decoders.py:616] nnx_decoders/carry Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0419 05:31:52.899924 135160546879296 nnx_decoders.py:616] nnx_decoders/carry Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0419 05:31:52.905285 135160546879296 nnx_decoders.py:616] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0419 05:31:52.905380 135160546879296 nnx_decoders.py:616] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0419 05:31:53.053324 135160546879296 attentions.py:1084] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0419 05:31:53.053457 135160546879296 attentions.py:1084] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0419 05:31:53.196856 135160546879296 attentions.py:1085] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0419 05:31:53.197003 135160546879296 attentions.py:1085] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0419 05:31:53.350483 135160546879296 attentions.py:1150] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0419 05:31:53.350615 135160546879296 attentions.py:1150] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0419 05:31:53.491254 135160546879296 attentions.py:1151] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0419 05:31:53.491382 135160546879296 attentions.py:1151] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0419 05:31:53.631158 135160546879296 attentions.py:1152] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0419 05:31:53.631297 135160546879296 attentions.py:1152] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0419 05:31:53.779993 135160546879296 attentions.py:1193] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0419 05:31:53.780127 135160546879296 attentions.py:1193] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0419 05:31:53.808610 135160546879296 linears.py:541] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0419 05:31:53.808743 135160546879296 linears.py:541] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0419 05:32:04.774650 135160546879296 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 05:32:04.782870 135160546879296 metric_logger.py:289] number parameters: 1.104 billion I0419 05:32:15.898404 135160546879296 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0419 05:32:16.054386 135160546879296 checkpointing.py:798] Waited 0.15596914291381836 seconds for step 0 to finish before starting checkpointing. I0419 05:32:16.057473 135160546879296 checkpoint_manager.py:2013] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0419 05:32:16.059905 135160546879296 checkpoint_manager.py:1518] [process=0] Saving checkpoint at step 0 I0419 05:32:16.062559 135160546879296 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/nnx_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints/0. I0419 05:32:16.790275 135160546879296 signaling_client.py:364] Using JaxDistributedSignalingClient I0419 05:32:17.488141 135034937779968 atomicity.py:137] Creating tmp directory gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/nnx_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints/0 I0419 05:32:17.489329 135160546879296 jax_array_handlers.py:358] Scheduling D2H of 69 prioritized jax.Array. I0419 05:32:17.489436 135160546879296 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 05:32:17.732007 135160546879296 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.245139s I0419 05:32:17.732781 135160546879296 base_pytree_checkpoint_handler.py:129] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 1.650 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.9346358776092529 s) (per-host) I0419 05:32:17.732868 135160546879296 base_pytree_checkpoint_handler.py:737] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 0.934741s (batch_requests_ready=0.679284s, total_serialization_initiated=0.254754s, others=0.000702s) I0419 05:32:17.732952 135160546879296 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.939262s (all_items=0.000023s, per_item={'items': '0.00002265'}, temp_paths=0.939239) I0419 05:32:17.733886 135036011521792 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0419 05:32:17.734045 135160546879296 async_checkpointer.py:561] Finished blocking save. Time taken: 1.674073s. Continuing background save to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/nnx_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints/0. I0419 05:32:17.781542 135160546879296 checkpoint_manager.py:1566] [process=0][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0419 05:32:17.781895 135034929387264 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0419 05:32:17.782056 135160546879296 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/nnx_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776576736.0574548, 'wait_for_prev_duration_secs': 6.580352783203125e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776576736.0599422, 'checkpointer_blocking_duration_secs': 1.674210548400879, 'get_old_steps_start_time': 1776576737.7341723, 'get_old_steps_duration_secs': 2.6941299438476562e-05, 'checkpoint_manager_blocking_start_time': 1776576736.0547857, 'checkpoint_manager_blocking_duration_secs': 1.7272298336029053} I0419 05:32:17.782168 135160546879296 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0419 05:32:17.782245 135160546879296 max_utils.py:750] Memstats: After params initialized: I0419 05:32:17.782299 135160546879296 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_0(process=0,(0,0,0,0)) I0419 05:32:17.782333 135160546879296 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_1(process=0,(1,0,0,0)) I0419 05:32:17.782361 135160546879296 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_4(process=0,(0,1,0,0)) I0419 05:32:17.782386 135160546879296 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_5(process=0,(1,1,0,0)) I0419 05:32:18.070623 135160546879296 metric_logger.py:185] completed step: 0, seconds: 10.846, TFLOP/s/device: 1.253, Tokens/s/device: 188.834, total_weights: 65536, loss: 10.874 I0419 05:32:18.073492 135160546879296 metric_logger.py:269] To see full metrics 'tensorboard --logdir=gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/nnx_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/tensorboard/' I0419 05:32:18.473240 135160546879296 metric_logger.py:185] completed step: 1, seconds: 2.169, TFLOP/s/device: 6.265, Tokens/s/device: 944.352, total_weights: 65536, loss: 10.874 I0419 05:32:18.615335 135160546879296 metric_logger.py:185] completed step: 2, seconds: 0.404, TFLOP/s/device: 33.639, Tokens/s/device: 5070.386, total_weights: 65536, loss: 10.262 I0419 05:32:18.762946 135160546879296 metric_logger.py:185] completed step: 3, seconds: 0.011, TFLOP/s/device: 1229.048, Tokens/s/device: 185255.540, total_weights: 65536, loss: 9.732 I0419 05:32:39.455000 135035469350656 checkpoint.py:188] Wrote Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776576738982680130, 'commit_timestamp_nsecs': None, 'custom_metadata': {}}, json={"item_handlers": null, "metrics": {}, "performance_metrics": {}, "init_timestamp_nsecs": 1776576738982680130, "commit_timestamp_nsecs": null, "custom_metadata": {}} to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/nnx_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints/0/_CHECKPOINT_METADATA I0419 05:32:39.456332 135036045092608 atomicity.py:137] Creating tmp directory gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/nnx_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints/0/items I0419 05:32:39.456593 135160546879296 metric_logger.py:185] completed step: 4, seconds: 0.144, TFLOP/s/device: 94.309, Tokens/s/device: 14215.312, total_weights: 65536, loss: 9.274 I0419 05:32:39.467681 135160546879296 metric_logger.py:185] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.475, Tokens/s/device: 13938.895, total_weights: 65536, loss: 8.888 I0419 05:32:39.611011 135160546879296 metric_logger.py:185] completed step: 6, seconds: 20.694, TFLOP/s/device: 0.657, Tokens/s/device: 98.968, total_weights: 65536, loss: 8.589 I0419 05:32:39.758430 135160546879296 metric_logger.py:185] completed step: 7, seconds: 0.008, TFLOP/s/device: 1761.588, Tokens/s/device: 265525.736, total_weights: 65536, loss: 8.380 I0419 05:32:39.905985 135160546879296 metric_logger.py:185] completed step: 8, seconds: 0.145, TFLOP/s/device: 93.674, Tokens/s/device: 14119.561, total_weights: 65536, loss: 8.251 I0419 05:32:40.054371 135160546879296 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0419 05:32:40.054971 135160546879296 checkpointing.py:798] Waited 0.0006158351898193359 seconds for step 9 to finish before starting checkpointing. I0419 05:32:40.056948 135160546879296 checkpoint_manager.py:2024] [process=0][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0419 05:32:41.144272 2640 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0419 05:32:43.148681 135039803188992 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/nnx_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints/0/items/array_metadatas/process_0 I0419 05:33:18.400890 135039794796288 base_pytree_checkpoint_handler.py:1232] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 37.275425s (commit=36.272003s, array_metadata_write=1.003422s) I0419 05:33:18.402063 135036011521792 base_pytree_checkpoint_handler.py:129] [process=0] /jax/checkpoint/write/gbytes_per_sec: 25.641 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 61.60388684272766 s) (per-host) I0419 05:33:18.402214 135036011521792 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 60.668218s. I0419 05:33:19.528573 135036011521792 checkpoint.py:228] Read Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776576738982680130, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} from gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/nnx_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints/0/_CHECKPOINT_METADATA I0419 05:33:20.263338 135035469350656 checkpoint.py:247] Updated Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776576738982680130, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/nnx_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints/0/_CHECKPOINT_METADATA I0419 05:33:20.910912 135036011521792 ocdbt_utils.py:49] Param validation support for Zarr3 will be added later (b/362328389). I0419 05:33:21.078786 135036011521792 array_metadata_store.py:411] [process=0][thread=async_save] Validated ArrayMetadata from all 8 hosts. Time taken: 0.000426s. I0419 05:33:21.852969 135036011521792 base_pytree_checkpoint_handler.py:1356] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 2.200955s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/nnx_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints/0/items I0419 05:33:21.855066 135036011521792 atomicity.py:608] Finalizing gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/nnx_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints/0/items I0419 05:33:22.270551 135036011521792 atomicity.py:608] Finalizing gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/nnx_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints/0 I0419 05:33:24.866799 135036011521792 atomicity.py:790] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/nnx_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints/0`. I0419 05:33:24.867765 135036011521792 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 68.807797s. directory=gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/nnx_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints/0 I0419 05:33:24.869361 135036011521792 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 67.135365s. I0419 05:33:24.869497 135034929387264 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0419 05:33:24.869594 135034929387264 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0419 05:33:24.869674 135034929387264 checkpoint_manager.py:2133] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0419 05:33:24.871652 135034929387264 checkpoint_manager.py:2142] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0419 05:33:24.871761 135160546879296 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 05:33:24.871845 135160546879296 checkpoint_manager.py:1458] Waiting for previous save to complete took 44.814907 seconds. If this number is high, consider checkpointing less frequently. I0419 05:33:24.873868 135160546879296 checkpoint_manager.py:1518] [process=0] Saving checkpoint at step 9 I0419 05:33:24.877259 135160546879296 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/nnx_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints/9. I0419 05:33:26.253599 135036011521792 atomicity.py:137] Creating tmp directory gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/nnx_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints/9 I0419 05:33:26.266890 135160546879296 jax_array_handlers.py:358] Scheduling D2H of 69 prioritized jax.Array. I0419 05:33:26.266988 135160546879296 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 05:33:26.295535 135160546879296 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.030670s I0419 05:33:26.296353 135160546879296 base_pytree_checkpoint_handler.py:129] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 5.380 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2867393493652344 s) (per-host) I0419 05:33:26.296429 135160546879296 base_pytree_checkpoint_handler.py:737] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 0.286832s (batch_requests_ready=0.249669s, total_serialization_initiated=0.036429s, others=0.000734s) I0419 05:33:26.296514 135160546879296 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.290593s (all_items=0.000016s, per_item={'items': '0.00001597'}, temp_paths=0.290577) I0419 05:33:26.297377 135034946172672 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0419 05:33:26.297544 135160546879296 async_checkpointer.py:561] Finished blocking save. Time taken: 1.423609s. Continuing background save to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/nnx_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints/9. I0419 05:33:26.753503 135160546879296 checkpoint_manager.py:1566] [process=0][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0419 05:33:26.753873 135034929387264 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0419 05:33:26.754060 135160546879296 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/nnx_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776576760.0569165, 'wait_for_prev_duration_secs': 44.81490707397461, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776576804.8739066, 'checkpointer_blocking_duration_secs': 1.4237444400787354, 'get_old_steps_start_time': 1776576806.2976718, 'get_old_steps_duration_secs': 2.5033950805664062e-05, 'checkpoint_manager_blocking_start_time': 1776576760.0552046, 'checkpoint_manager_blocking_duration_secs': 46.69881772994995} I0419 05:33:26.754206 135160546879296 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0419 05:33:26.754255 135160546879296 checkpoint_manager.py:2024] [process=0][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0419 05:33:29.297635 135039794796288 atomicity.py:137] Creating tmp directory gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/nnx_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints/9/items I0419 05:33:33.010008 135034974131968 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/nnx_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints/9/items/array_metadatas/process_0 I0419 05:34:13.357138 135034965739264 base_pytree_checkpoint_handler.py:1232] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 42.472919s (commit=40.549330s, array_metadata_write=1.923590s) I0419 05:34:13.358314 135034946172672 base_pytree_checkpoint_handler.py:129] [process=0] /jax/checkpoint/write/gbytes_per_sec: 33.361 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 47.348668336868286 s) (per-host) I0419 05:34:13.358442 135034946172672 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 47.060939s. I0419 05:34:15.461117 135034946172672 ocdbt_utils.py:49] Param validation support for Zarr3 will be added later (b/362328389). I0419 05:34:15.682039 135034946172672 array_metadata_store.py:411] [process=0][thread=async_save] Validated ArrayMetadata from all 8 hosts. Time taken: 0.000409s. I0419 05:34:16.563605 135034946172672 base_pytree_checkpoint_handler.py:1356] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 1.923902s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/nnx_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints/9/items I0419 05:34:16.568586 135034946172672 atomicity.py:608] Finalizing gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/nnx_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints/9/items I0419 05:34:16.987072 135034946172672 atomicity.py:608] Finalizing gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/nnx_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints/9 I0419 05:34:18.254913 135034946172672 atomicity.py:790] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/nnx_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints/9`. I0419 05:34:18.255702 135034946172672 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 53.381771s. directory=gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/nnx_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_false/checkpoints/9 I0419 05:34:18.257191 135034946172672 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 51.959688s. I0419 05:34:18.257340 135034929387264 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0419 05:34:18.257399 135034929387264 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0419 05:34:18.257458 135034929387264 checkpoint_manager.py:2133] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0419 05:34:18.259848 135034929387264 checkpoint_manager.py:2142] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0419 05:34:18.260000 135160546879296 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 05:34:18.260159 135160546879296 checkpoint_manager.py:2013] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0419 05:34:18.260790 135160546879296 metric_logger.py:185] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.380, Tokens/s/device: 13924.584, total_weights: 65536, loss: 8.175 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Sun Apr 19 05:34:29 UTC 2026 EXIT_CODE=0