XPK Start: Fri Apr 24 16:03:27 UTC 2026 2026-04-24 16:03:31.363537: 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 00:00:1777046611.376746 10 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered E0000 00:00:1777046611.380534 10 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered W0000 00:00:1777046611.392064 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1777046611.392083 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1777046611.392085 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1777046611.392087 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. 2026-04-24 16:03:50.834326: 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 16:03:51.369877 132891047843648 max_utils.py:273] Attempting to initialize the jax distributed system... INFO:2026-04-24 16:04:00,411:jax._src.distributed:140: Starting JAX distributed service on [::]:8482 I0424 16:04:00.411249 132891047843648 distributed.py:140] Starting JAX distributed service on [::]:8482 INFO:2026-04-24 16:04:00,413:jax._src.distributed:157: Connecting to JAX distributed service on mt-15-ocdbt-false-sv-3lopc-slice-job-0-0.mt-15-ocdbt-false-sv-3lopc:8482 I0424 16:04:00.413623 132891047843648 distributed.py:157] Connecting to JAX distributed service on mt-15-ocdbt-false-sv-3lopc-slice-job-0-0.mt-15-ocdbt-false-sv-3lopc:8482 I0424 16:04:01.102343 132891047843648 max_utils.py:284] Jax distributed system initialized! I0424 16:04:08.277094 132891047843648 max_utils.py:800] System Information: Jax Version: 0.8.1 I0424 16:04:08.277198 132891047843648 max_utils.py:801] System Information: Jaxlib Version: 0.8.1 I0424 16:04:08.277238 132891047843648 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 16:04:08.277272 132891047843648 train_utils.py:377] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0424 16:04:08.903088 132891047843648 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0424 16:04:08.903673 132891047843648 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0424 16:04:08.903858 132891047843648 checkpointing.py:688] Setting up checkpoint logger... I0424 16:04:08.903907 132891047843648 checkpointing.py:234] Creating checkpoint manager with ocdbt=False and zarr3=True I0424 16:04:08.903963 132891047843648 pytree_checkpoint_handler.py:589] save_device_host_concurrent_bytes=None I0424 16:04:08.904307 132891047843648 base_pytree_checkpoint_handler.py:415] Created BasePyTreeCheckpointHandler: use_ocdbt=False, use_zarr3=True, pytree_metadata_options=PyTreeMetadataOptions(support_rich_types=False), array_metadata_store=<orbax.checkpoint._src.metadata.array_metadata_store.Store object at 0x78dc8ad79010>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0424 16:04:11.905342 132891047843648 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0424 16:04:11.905691 132891047843648 checkpoint_manager.py:709] [process=3][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x78c8243f71a0>}, handler_registry=None I0424 16:04:11.905938 132891047843648 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x78c8243f71a0>` 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 16:04:11.905989 132891047843648 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x78c824488e30>` 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 16:04:11.906025 132891047843648 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 0x78c8243f71a0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x78c8243f71a0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x78c824488e30>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x78c824488e30>}). I0424 16:04:11.906524 132891047843648 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.33 I0424 16:04:11.906600 132891047843648 async_checkpointer.py:177] [process=3][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x78c80c79c180> timeout: 600 secs and primary_host=0 for async checkpoint writes I0424 16:04:12.837092 132891047843648 checkpoint_manager.py:1818] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/linen_xpk_feat_nnx_set_defaults_true_20260424_145744_15_ocdbt_false/checkpoints I0424 16:04:13.257691 132891047843648 checkpoint_manager.py:929] [process=3][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=5), 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_20260424_145744/linen_xpk_feat_nnx_set_defaults_true_20260424_145744_15_ocdbt_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x78c80c533ef0> I0424 16:04:13.257865 132891047843648 checkpointing.py:302] Checkpoint manager created! I0424 16:04:14.198916 132891047843648 nnx_wrappers.py:455] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0424 16:04:14.199032 132891047843648 nnx_wrappers.py:455] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0424 16:04:14.568553 132891047843648 attentions.py:1084] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0424 16:04:14.568648 132891047843648 attentions.py:1084] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0424 16:04:14.584509 132891047843648 attentions.py:1085] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0424 16:04:14.584571 132891047843648 attentions.py:1085] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0424 16:04:14.607457 132891047843648 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 16:04:14.607535 132891047843648 attentions.py:1150] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 16:04:14.623524 132891047843648 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 16:04:14.623589 132891047843648 attentions.py:1151] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 16:04:14.639440 132891047843648 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 16:04:14.639505 132891047843648 attentions.py:1152] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 16:04:14.664357 132891047843648 attentions.py:1193] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0424 16:04:14.664427 132891047843648 attentions.py:1193] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 16:04:14.684029 132891047843648 linears.py:541] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0424 16:04:14.684094 132891047843648 linears.py:541] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0424 16:04:14.873828 132891047843648 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0424 16:04:14.873954 132891047843648 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0424 16:04:16.305114 132891047843648 maxtext_utils.py:1740] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: PartitionSpec('norm',) Physical: (None,) I0424 16:04:16.305254 132891047843648 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) I0424 16:04:16.305311 132891047843648 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) I0424 16:04:16.305371 132891047843648 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') I0424 16:04:16.305425 132891047843648 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) I0424 16:04:16.305472 132891047843648 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) I0424 16:04:16.305527 132891047843648 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) I0424 16:04:16.305580 132891047843648 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') I0424 16:04:16.305621 132891047843648 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) I0424 16:04:16.305660 132891047843648 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) I0424 16:04:16.305709 132891047843648 maxtext_utils.py:1740] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: PartitionSpec('embed', 'vocab') Physical: ('fsdp', None) I0424 16:04:16.305759 132891047843648 maxtext_utils.py:1740] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: PartitionSpec('vocab', 'embed') Physical: (None, 'fsdp') I0424 16:04:16.816078 132891047843648 train.py:158] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0424 16:04:16.816176 132891047843648 train.py:158] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0424 16:04:16.831166 132891047843648 train.py:165] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0424 16:04:16.831228 132891047843648 train.py:165] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0424 16:04:27.846232 132891047843648 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. I0424 16:04:27.847050 132891047843648 metric_logger.py:289] number parameters: 1.104 billion I0424 16:04:39.276501 132891047843648 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0424 16:04:39.429283 132891047843648 checkpointing.py:798] Waited 0.15276408195495605 seconds for step 0 to finish before starting checkpointing. I0424 16:04:39.431765 132891047843648 checkpoint_manager.py:2013] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0424 16:04:39.433381 132891047843648 checkpoint_manager.py:1518] [process=3] Saving checkpoint at step 0 I0424 16:04:39.436037 132891047843648 async_checkpointer.py:452] [process=3] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/linen_xpk_feat_nnx_set_defaults_true_20260424_145744_15_ocdbt_false/checkpoints/0. I0424 16:04:40.066544 132891047843648 signaling_client.py:364] Using JaxDistributedSignalingClient I0424 16:04:40.067603 132891047843648 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array. I0424 16:04:40.067661 132891047843648 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 16:04:40.318796 132891047843648 base_pytree_checkpoint_handler.py:153] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.252332s I0424 16:04:40.318985 132891047843648 base_pytree_checkpoint_handler.py:129] [process=3] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.726 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.5658533573150635 s) (per-host) I0424 16:04:40.319044 132891047843648 base_pytree_checkpoint_handler.py:737] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.565921s (batch_requests_ready=0.309896s, total_serialization_initiated=0.255948s, others=0.000077s) I0424 16:04:40.319136 132891047843648 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.570237s (all_items=0.000019s, per_item={'items': '0.00001931'}, temp_paths=0.570218) I0424 16:04:40.320096 132765223745280 async_checkpointer.py:79] [process=3][thread=async_save] Background save thread started. I0424 16:04:40.320269 132891047843648 async_checkpointer.py:561] Finished blocking save. Time taken: 0.886817s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/linen_xpk_feat_nnx_set_defaults_true_20260424_145744_15_ocdbt_false/checkpoints/0. I0424 16:04:40.322096 132891047843648 checkpoint_manager.py:1566] [process=3][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0424 16:04:40.322361 132764124825344 async_checkpointer.py:265] [process=3][thread=save_finalize] Waiting for background save thread=async_save. I0424 16:04:40.322488 132891047843648 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/linen_xpk_feat_nnx_set_defaults_true_20260424_145744_15_ocdbt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777046679.4317474, 'wait_for_prev_duration_secs': 6.198883056640625e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777046679.4334188, 'checkpointer_blocking_duration_secs': 0.8869562149047852, 'get_old_steps_start_time': 1777046680.3203933, 'get_old_steps_duration_secs': 2.5987625122070312e-05, 'checkpoint_manager_blocking_start_time': 1777046679.4298291, 'checkpoint_manager_blocking_duration_secs': 0.8926243782043457} I0424 16:04:40.322644 132891047843648 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0424 16:04:40.322693 132891047843648 max_utils.py:750] Memstats: After params initialized: I0424 16:04:40.322744 132891047843648 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_10(process=3,(2,2,0,0)) I0424 16:04:40.322777 132891047843648 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_11(process=3,(3,2,0,0)) I0424 16:04:40.322803 132891047843648 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_14(process=3,(2,3,0,0)) I0424 16:04:40.322828 132891047843648 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_15(process=3,(3,3,0,0)) I0424 16:04:40.592156 132891047843648 metric_logger.py:185] completed step: 0, seconds: 11.429, TFLOP/s/device: 1.189, Tokens/s/device: 179.188, total_weights: 65536, loss: 10.874 I0424 16:04:40.763133 132891047843648 metric_logger.py:185] completed step: 1, seconds: 1.314, TFLOP/s/device: 10.338, Tokens/s/device: 1558.183, total_weights: 65536, loss: 10.874 I0424 16:04:41.226662 132891047843648 metric_logger.py:185] completed step: 2, seconds: 0.024, TFLOP/s/device: 572.282, Tokens/s/device: 86260.635, total_weights: 65536, loss: 10.560 I0424 16:04:41.374178 132891047843648 metric_logger.py:185] completed step: 3, seconds: 0.464, TFLOP/s/device: 29.295, Tokens/s/device: 4415.725, total_weights: 65536, loss: 9.980 I0424 16:04:41.378766 132891047843648 checkpointing.py:794] Waiting for step 5 to finish before checkpoint... I0424 16:04:41.668462 132891047843648 checkpointing.py:798] Waited 0.28966379165649414 seconds for step 5 to finish before starting checkpointing. I0424 16:04:41.671442 132891047843648 checkpoint_manager.py:2024] [process=3][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0424 16:04:42.945389 2595 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0424 16:04:44.858799 132765712779008 array_metadata_store.py:203] [process=3][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/linen_xpk_feat_nnx_set_defaults_true_20260424_145744_15_ocdbt_false/checkpoints/0/items/array_metadatas/process_3 I0424 16:04:50.499063 132765223745280 base_pytree_checkpoint_handler.py:129] [process=3] /jax/checkpoint/write/gbytes_per_sec: 146.996 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 10.745883703231812 s) (per-host) I0424 16:04:50.499172 132765223745280 async_checkpointer.py:90] [process=3][thread=async_save] 3 Handler Commit operations completed. Time taken: 10.178962s. I0424 16:04:56.739610 132765223745280 async_checkpointer.py:144] [process=3][thread=async_save] Background save thread done. Time taken: 16.419385s. I0424 16:04:56.739982 132764124825344 async_checkpointer.py:273] [process=3][thread=save_finalize] Done with waiting for background save thread=async_save. I0424 16:04:56.740101 132764124825344 async_checkpointer.py:283] [process=3][thread=save_finalize] No errors found in background save thread=async_save. I0424 16:04:56.740158 132764124825344 checkpoint_manager.py:2133] [process=3][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0424 16:04:56.741550 132764124825344 checkpoint_manager.py:2142] [process=3][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0424 16:04:56.741741 132891047843648 checkpoint_manager.py:2036] [process=3][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0. W0424 16:04:56.741875 132891047843648 checkpoint_manager.py:1458] Waiting for previous save to complete took 15.070438 seconds. If this number is high, consider checkpointing less frequently. I0424 16:04:56.744070 132891047843648 checkpoint_manager.py:1518] [process=3] Saving checkpoint at step 5 I0424 16:04:56.748488 132891047843648 async_checkpointer.py:452] [process=3] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/linen_xpk_feat_nnx_set_defaults_true_20260424_145744_15_ocdbt_false/checkpoints/5. I0424 16:04:57.465686 132891047843648 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array. I0424 16:04:57.465788 132891047843648 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 16:04:57.509685 132891047843648 base_pytree_checkpoint_handler.py:153] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.045088s I0424 16:04:57.509851 132891047843648 base_pytree_checkpoint_handler.py:129] [process=3] /jax/checkpoint/write/blocking_gbytes_per_sec: 4.985 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.30944275856018066 s) (per-host) I0424 16:04:57.509903 132891047843648 base_pytree_checkpoint_handler.py:737] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.309505s (batch_requests_ready=0.262511s, total_serialization_initiated=0.046924s, others=0.000071s) I0424 16:04:57.509999 132891047843648 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.314605s (all_items=0.000017s, per_item={'items': '0.00001669'}, temp_paths=0.314589) I0424 16:04:57.510833 132759838250752 async_checkpointer.py:79] [process=3][thread=async_save] Background save thread started. I0424 16:04:57.511004 132891047843648 async_checkpointer.py:561] Finished blocking save. Time taken: 0.766866s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/linen_xpk_feat_nnx_set_defaults_true_20260424_145744_15_ocdbt_false/checkpoints/5. I0424 16:04:57.619033 132891047843648 checkpoint_manager.py:1566] [process=3][thread=MainThread][step=5] Starting CheckpointManager Save Finalize thread=save_finalize I0424 16:04:57.619397 132764124825344 async_checkpointer.py:265] [process=3][thread=save_finalize] Waiting for background save thread=async_save. I0424 16:04:57.619563 132891047843648 standard_logger.py:34] {'step': 5, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/linen_xpk_feat_nnx_set_defaults_true_20260424_145744_15_ocdbt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777046681.6714134, 'wait_for_prev_duration_secs': 15.070437669754028, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777046696.7441084, 'checkpointer_blocking_duration_secs': 0.7670025825500488, 'get_old_steps_start_time': 1777046697.5111296, 'get_old_steps_duration_secs': 2.7894973754882812e-05, 'checkpoint_manager_blocking_start_time': 1777046681.6691365, 'checkpoint_manager_blocking_duration_secs': 15.950388669967651} I0424 16:04:57.619681 132891047843648 checkpointing.py:409] Started an asynchronous checkpoint save for step 5 I0424 16:04:57.620301 132891047843648 metric_logger.py:185] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.898, Tokens/s/device: 13399.634, total_weights: 65536, loss: 9.460 I0424 16:04:57.626333 132891047843648 metric_logger.py:185] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.159, Tokens/s/device: 13891.150, total_weights: 65536, loss: 8.959 I0424 16:05:17.149136 132891047843648 metric_logger.py:185] completed step: 6, seconds: 16.246, TFLOP/s/device: 0.836, Tokens/s/device: 126.059, total_weights: 65536, loss: 8.469 I0424 16:05:17.296548 132891047843648 metric_logger.py:185] completed step: 7, seconds: 19.377, TFLOP/s/device: 0.701, Tokens/s/device: 105.693, total_weights: 65536, loss: 8.003 I0424 16:05:17.443898 132891047843648 metric_logger.py:185] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.337, Tokens/s/device: 13465.888, total_weights: 65536, loss: 7.572 I0424 16:05:17.591284 132891047843648 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0424 16:05:17.591967 132891047843648 checkpointing.py:798] Waited 0.0007004737854003906 seconds for step 9 to finish before starting checkpointing. I0424 16:05:17.593983 132891047843648 checkpoint_manager.py:2024] [process=3][thread=MainThread][step=5][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0424 16:05:21.712404 132765712779008 array_metadata_store.py:203] [process=3][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/linen_xpk_feat_nnx_set_defaults_true_20260424_145744_15_ocdbt_false/checkpoints/5/items/array_metadatas/process_3 I0424 16:05:27.928653 132759838250752 base_pytree_checkpoint_handler.py:129] [process=3] /jax/checkpoint/write/gbytes_per_sec: 51.405 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 30.7281813621521 s) (per-host) I0424 16:05:27.928780 132759838250752 async_checkpointer.py:90] [process=3][thread=async_save] 3 Handler Commit operations completed. Time taken: 30.417826s. I0424 16:05:33.071619 132759838250752 async_checkpointer.py:144] [process=3][thread=async_save] Background save thread done. Time taken: 35.560643s. I0424 16:05:33.071907 132764124825344 async_checkpointer.py:273] [process=3][thread=save_finalize] Done with waiting for background save thread=async_save. I0424 16:05:33.072063 132764124825344 async_checkpointer.py:283] [process=3][thread=save_finalize] No errors found in background save thread=async_save. I0424 16:05:33.072118 132764124825344 checkpoint_manager.py:2133] [process=3][thread=save_finalize][step=5] CheckpointManager Save Finalize is syncing with other hosts... I0424 16:05:33.074470 132764124825344 checkpoint_manager.py:2142] [process=3][thread=save_finalize][step=5] CheckpointManager Save Finalize is done on all hosts. I0424 16:05:33.074682 132891047843648 checkpoint_manager.py:2036] [process=3][thread=MainThread][step=5][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=5. W0424 16:05:33.074814 132891047843648 checkpoint_manager.py:1458] Waiting for previous save to complete took 15.480841 seconds. If this number is high, consider checkpointing less frequently. I0424 16:05:33.076429 132891047843648 checkpoint_manager.py:1518] [process=3] Saving checkpoint at step 9 I0424 16:05:33.079843 132891047843648 async_checkpointer.py:452] [process=3] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/linen_xpk_feat_nnx_set_defaults_true_20260424_145744_15_ocdbt_false/checkpoints/9. I0424 16:05:33.614356 132891047843648 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array. I0424 16:05:33.614453 132891047843648 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 16:05:33.657802 132891047843648 base_pytree_checkpoint_handler.py:153] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.044367s I0424 16:05:33.657979 132891047843648 base_pytree_checkpoint_handler.py:129] [process=3] /jax/checkpoint/write/blocking_gbytes_per_sec: 5.062 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.3047525882720947 s) (per-host) I0424 16:05:33.658029 132891047843648 base_pytree_checkpoint_handler.py:737] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.304813s (batch_requests_ready=0.258361s, total_serialization_initiated=0.046387s, others=0.000066s) I0424 16:05:33.658117 132891047843648 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.309496s (all_items=0.000010s, per_item={'items': '0.00001049'}, temp_paths=0.309485) I0424 16:05:33.659069 132760904333056 async_checkpointer.py:79] [process=3][thread=async_save] Background save thread started. I0424 16:05:33.659231 132891047843648 async_checkpointer.py:561] Finished blocking save. Time taken: 0.582728s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/linen_xpk_feat_nnx_set_defaults_true_20260424_145744_15_ocdbt_false/checkpoints/9. I0424 16:05:33.661156 132891047843648 checkpoint_manager.py:1566] [process=3][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0424 16:05:33.661409 132764124825344 async_checkpointer.py:265] [process=3][thread=save_finalize] Waiting for background save thread=async_save. I0424 16:05:33.661563 132891047843648 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/linen_xpk_feat_nnx_set_defaults_true_20260424_145744_15_ocdbt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777046717.5939567, 'wait_for_prev_duration_secs': 15.480840682983398, 'time_between_consecutive_saves_sec': 20.85236668586731, 'checkpointer_blocking_start_time': 1777046733.0764709, 'checkpointer_blocking_duration_secs': 0.5828666687011719, 'get_old_steps_start_time': 1777046733.6593506, 'get_old_steps_duration_secs': 1.9550323486328125e-05, 'checkpoint_manager_blocking_start_time': 1777046717.5921936, 'checkpoint_manager_blocking_duration_secs': 16.069338083267212} I0424 16:05:33.661663 132891047843648 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0424 16:05:33.661705 132891047843648 checkpoint_manager.py:2024] [process=3][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0424 16:05:38.419622 132765712779008 array_metadata_store.py:203] [process=3][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/linen_xpk_feat_nnx_set_defaults_true_20260424_145744_15_ocdbt_false/checkpoints/9/items/array_metadatas/process_3 I0424 16:05:44.153481 132760904333056 base_pytree_checkpoint_handler.py:129] [process=3] /jax/checkpoint/write/gbytes_per_sec: 146.256 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 10.80021357536316 s) (per-host) I0424 16:05:44.153610 132760904333056 async_checkpointer.py:90] [process=3][thread=async_save] 3 Handler Commit operations completed. Time taken: 10.494429s. I0424 16:05:49.602363 132760904333056 async_checkpointer.py:144] [process=3][thread=async_save] Background save thread done. Time taken: 15.943166s. I0424 16:05:49.602694 132764124825344 async_checkpointer.py:273] [process=3][thread=save_finalize] Done with waiting for background save thread=async_save. I0424 16:05:49.602827 132764124825344 async_checkpointer.py:283] [process=3][thread=save_finalize] No errors found in background save thread=async_save. I0424 16:05:49.602870 132764124825344 checkpoint_manager.py:2133] [process=3][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0424 16:05:49.604302 132764124825344 checkpoint_manager.py:2142] [process=3][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0424 16:05:49.604470 132891047843648 checkpoint_manager.py:2036] [process=3][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9. I0424 16:05:49.604623 132891047843648 checkpoint_manager.py:2013] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0424 16:05:49.605243 132891047843648 metric_logger.py:185] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.187, Tokens/s/device: 13895.391, total_weights: 65536, loss: 7.181 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Fri Apr 24 16:06:02 UTC 2026 EXIT_CODE=0