XPK Start: Thu Apr 23 16:02:14 UTC 2026 2026-04-23 16:02:18.903574: 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 00:00:1776960138.916138 10 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered E0000 00:00:1776960138.919956 10 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered W0000 00:00:1776960138.931391 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776960138.931409 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776960138.931412 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776960138.931414 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. 2026-04-23 16:02:37.951869: E external/local_xla/xla/stream_executor/cuda/cuda_platform.cc:51] failed call to cuInit: INTERNAL: CUDA error: Failed call to cuInit: UNKNOWN ERROR (303) I0423 16:02:38.477598 137110758524736 max_utils.py:273] Attempting to initialize the jax distributed system... INFO:2026-04-23 16:02:47,517:jax._src.distributed:140: Starting JAX distributed service on [::]:8482 I0423 16:02:47.517716 137110758524736 distributed.py:140] Starting JAX distributed service on [::]:8482 INFO:2026-04-23 16:02:47,520:jax._src.distributed:157: Connecting to JAX distributed service on mt-04-int8-nzdye-slice-job-0-0.mt-04-int8-nzdye:8482 I0423 16:02:47.520016 137110758524736 distributed.py:157] Connecting to JAX distributed service on mt-04-int8-nzdye-slice-job-0-0.mt-04-int8-nzdye:8482 I0423 16:02:49.520671 137110758524736 max_utils.py:284] Jax distributed system initialized! I0423 16:02:56.379232 137110758524736 max_utils.py:800] System Information: Jax Version: 0.8.1 I0423 16:02:56.379346 137110758524736 max_utils.py:801] System Information: Jaxlib Version: 0.8.1 I0423 16:02:56.379387 137110758524736 max_utils.py:802] System Information: Jax Backend: PJRT C API TFRT TPU v6 lite Built on Nov 12 2025 14:16:36 (1762985796) cl/831091709 I0423 16:02:56.379423 137110758524736 train_utils.py:377] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0423 16:02:56.996012 137110758524736 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0423 16:02:56.996607 137110758524736 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0423 16:02:56.996917 137110758524736 checkpointing.py:688] Setting up checkpoint logger... I0423 16:02:56.996973 137110758524736 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0423 16:02:56.997017 137110758524736 pytree_checkpoint_handler.py:589] save_device_host_concurrent_bytes=None I0423 16:02:56.997414 137110758524736 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 0x7cb319b75700>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0423 16:02:59.881870 137110758524736 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0423 16:02:59.882108 137110758524736 checkpoint_manager.py:709] [process=5][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ca070e80680>}, handler_registry=None I0423 16:02:59.882353 137110758524736 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ca070e80680>` for item "items" and save args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>` to `_handler_registry`. I0423 16:02:59.882405 137110758524736 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7c9e7877adb0>` for item "metrics" and save args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>` to `_handler_registry`. I0423 16:02:59.882441 137110758524736 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 0x7ca070e80680>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ca070e80680>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7c9e7877adb0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7c9e7877adb0>}). I0423 16:02:59.882975 137110758524736 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.33 I0423 16:02:59.883057 137110758524736 async_checkpointer.py:177] [process=5][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7c9e78188180> timeout: 600 secs and primary_host=0 for async checkpoint writes I0423 16:03:00.617791 137110758524736 checkpoint_manager.py:1818] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_04_int8/checkpoints I0423 16:03:00.644792 137110758524736 checkpoint_manager.py:929] [process=5][thread=MainThread] CheckpointManager created, primary_host=0, CheckpointManagerOptions=CheckpointManagerOptions(save_interval_steps=1, max_to_keep=None, keep_time_interval=None, keep_period=None, should_keep_fn=None, best_fn=None, best_mode='max', keep_checkpoints_without_metrics=True, step_prefix=None, step_format_fixed_length=None, step_name_format=None, create=True, cleanup_tmp_directories=False, save_on_steps=frozenset(), single_host_load_and_broadcast=False, todelete_subdir=None, todelete_full_path=None, enable_background_delete=False, read_only=False, enable_async_checkpointing=True, async_options=None, multiprocessing_options=MultiprocessingOptions(primary_host=0, active_processes=None, barrier_sync_key_prefix=None), should_save_fn=None, file_options=FileOptions(path_permission_mode=None), save_root_metadata=True, temporary_path_class=None, save_decision_policy=FixedIntervalPolicy(interval=10), preservation_policy=LatestN(n=None), prevent_write_metrics=False, enable_should_save_is_saving_in_progress_check=True, enable_per_process_directory_creation=False, lightweight_initialize=False), root_directory=gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_04_int8/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7cb1d0e5a180> I0423 16:03:00.644930 137110758524736 checkpointing.py:302] Checkpoint manager created! I0423 16:03:01.835285 137110758524736 nnx_wrappers.py:455] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0423 16:03:01.835391 137110758524736 nnx_wrappers.py:455] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 16:03:02.210670 137110758524736 attentions.py:1084] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 16:03:02.210766 137110758524736 attentions.py:1084] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 16:03:02.226671 137110758524736 attentions.py:1085] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 16:03:02.226735 137110758524736 attentions.py:1085] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 16:03:02.304568 137110758524736 attentions.py:1150] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 16:03:02.304673 137110758524736 attentions.py:1150] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 16:03:02.320675 137110758524736 attentions.py:1151] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 16:03:02.320736 137110758524736 attentions.py:1151] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 16:03:02.336688 137110758524736 attentions.py:1152] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 16:03:02.336754 137110758524736 attentions.py:1152] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 16:03:02.360960 137110758524736 attentions.py:1193] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0423 16:03:02.361029 137110758524736 attentions.py:1193] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 16:03:02.441293 137110758524736 linears.py:541] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0423 16:03:02.441382 137110758524736 linears.py:541] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0423 16:03:03.039770 137110758524736 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0423 16:03:03.039881 137110758524736 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0423 16:03:05.723705 137110758524736 maxtext_utils.py:1740] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: PartitionSpec('norm',) Physical: (None,) I0423 16:03:05.723844 137110758524736 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) I0423 16:03:05.723899 137110758524736 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) I0423 16:03:05.723958 137110758524736 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') I0423 16:03:05.724016 137110758524736 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) I0423 16:03:05.724057 137110758524736 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) I0423 16:03:05.724112 137110758524736 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) I0423 16:03:05.724167 137110758524736 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') I0423 16:03:05.724214 137110758524736 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) I0423 16:03:05.724255 137110758524736 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) I0423 16:03:05.724305 137110758524736 maxtext_utils.py:1740] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: PartitionSpec('embed', 'vocab') Physical: ('fsdp', None) I0423 16:03:05.724353 137110758524736 maxtext_utils.py:1740] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: PartitionSpec('vocab', 'embed') Physical: (None, 'fsdp') I0423 16:03:07.421037 137110758524736 train.py:158] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0423 16:03:07.421131 137110758524736 train.py:158] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0423 16:03:07.436030 137110758524736 train.py:165] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0423 16:03:07.436091 137110758524736 train.py:165] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0423 16:03:21.374807 137110758524736 max_utils.py:791] Total memory size: 1.8 GB, Output size: 0.4 GB, Temp size: 1.4 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB. I0423 16:03:21.375750 137110758524736 metric_logger.py:289] number parameters: 1.104 billion I0423 16:03:36.393352 137110758524736 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0423 16:03:36.634175 137110758524736 checkpointing.py:798] Waited 0.24080204963684082 seconds for step 0 to finish before starting checkpointing. I0423 16:03:36.636789 137110758524736 checkpoint_manager.py:2013] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 16:03:36.638993 137110758524736 checkpoint_manager.py:1518] [process=5] Saving checkpoint at step 0 I0423 16:03:36.641809 137110758524736 async_checkpointer.py:452] [process=5] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_04_int8/checkpoints/0. I0423 16:03:37.193236 137110758524736 signaling_client.py:364] Using JaxDistributedSignalingClient I0423 16:03:37.194364 137110758524736 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array. I0423 16:03:37.194423 137110758524736 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False I0423 16:03:37.443419 137110758524736 base_pytree_checkpoint_handler.py:153] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.250262s I0423 16:03:37.443595 137110758524736 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/blocking_gbytes_per_sec: 3.116 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.4950876235961914 s) (per-host) I0423 16:03:37.443661 137110758524736 base_pytree_checkpoint_handler.py:737] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.495154s (batch_requests_ready=0.241279s, total_serialization_initiated=0.253801s, others=0.000074s) I0423 16:03:37.443764 137110758524736 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.499819s (all_items=0.000020s, per_item={'items': '0.00002003'}, temp_paths=0.499799) I0423 16:03:37.444688 136979544405760 async_checkpointer.py:79] [process=5][thread=async_save] Background save thread started. I0423 16:03:37.444857 137110758524736 async_checkpointer.py:561] Finished blocking save. Time taken: 0.805792s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_04_int8/checkpoints/0. I0423 16:03:37.471687 137110758524736 checkpoint_manager.py:1566] [process=5][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0423 16:03:37.471961 136974711101184 async_checkpointer.py:265] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0423 16:03:37.472089 137110758524736 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_04_int8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776960216.636771, 'wait_for_prev_duration_secs': 6.222724914550781e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776960216.6390321, 'checkpointer_blocking_duration_secs': 0.8059325218200684, 'get_old_steps_start_time': 1776960217.4449852, 'get_old_steps_duration_secs': 2.7418136596679688e-05, 'checkpoint_manager_blocking_start_time': 1776960216.634802, 'checkpoint_manager_blocking_duration_secs': 0.8372478485107422} I0423 16:03:37.472202 137110758524736 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0423 16:03:37.472256 137110758524736 max_utils.py:750] Memstats: After params initialized: I0423 16:03:37.472307 137110758524736 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_18(process=5,(2,4,0,0)) I0423 16:03:37.472343 137110758524736 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_19(process=5,(3,4,0,0)) I0423 16:03:37.472371 137110758524736 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_22(process=5,(2,5,0,0)) I0423 16:03:37.472395 137110758524736 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_23(process=5,(3,5,0,0)) I0423 16:03:37.745153 137110758524736 metric_logger.py:185] completed step: 0, seconds: 15.017, TFLOP/s/device: 0.905, Tokens/s/device: 136.374, total_weights: 65536, loss: 10.874 I0423 16:03:37.995212 137110758524736 metric_logger.py:185] completed step: 1, seconds: 1.350, TFLOP/s/device: 10.062, Tokens/s/device: 1516.614, total_weights: 65536, loss: 10.874 I0423 16:03:38.416160 137110758524736 metric_logger.py:185] completed step: 2, seconds: 0.022, TFLOP/s/device: 628.946, Tokens/s/device: 94801.648, total_weights: 65536, loss: 10.262 I0423 16:03:38.645746 137110758524736 metric_logger.py:185] completed step: 3, seconds: 0.421, TFLOP/s/device: 32.249, Tokens/s/device: 4860.959, total_weights: 65536, loss: 9.731 I0423 16:03:39.105033 137110758524736 metric_logger.py:185] completed step: 4, seconds: 0.234, TFLOP/s/device: 58.001, Tokens/s/device: 8742.610, total_weights: 65536, loss: 9.272 I0423 16:03:39.110827 137110758524736 metric_logger.py:185] completed step: 5, seconds: 0.229, TFLOP/s/device: 59.209, Tokens/s/device: 8924.681, total_weights: 65536, loss: 8.887 I0423 16:04:01.880767 137110758524736 metric_logger.py:185] completed step: 6, seconds: 0.460, TFLOP/s/device: 29.556, Tokens/s/device: 4455.031, total_weights: 65536, loss: 8.588 I0423 16:04:02.111871 137110758524736 metric_logger.py:185] completed step: 7, seconds: 22.542, TFLOP/s/device: 0.603, Tokens/s/device: 90.852, total_weights: 65536, loss: 8.380 I0423 16:04:02.341307 137110758524736 metric_logger.py:185] completed step: 8, seconds: 0.233, TFLOP/s/device: 58.231, Tokens/s/device: 8777.155, total_weights: 65536, loss: 8.251 I0423 16:04:02.571359 137110758524736 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0423 16:04:02.572061 137110758524736 checkpointing.py:798] Waited 0.0007219314575195312 seconds for step 9 to finish before starting checkpointing. I0423 16:04:02.574041 137110758524736 checkpoint_manager.py:2024] [process=5][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 16:04:03.392278 2788 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0423 16:04:05.342007 136979593295616 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_04_int8/checkpoints/0/items/array_metadatas/process_5 I0423 16:04:33.485913 136979544405760 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/gbytes_per_sec: 27.939 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 56.53736853599548 s) (per-host) I0423 16:04:33.486018 136979544405760 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 56.041216s. I0423 16:04:41.643502 136979544405760 async_checkpointer.py:144] [process=5][thread=async_save] Background save thread done. Time taken: 64.198685s. I0423 16:04:41.643754 136974711101184 async_checkpointer.py:273] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 16:04:41.643822 136974711101184 async_checkpointer.py:283] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0423 16:04:41.643872 136974711101184 checkpoint_manager.py:2133] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0423 16:04:41.646019 136974711101184 checkpoint_manager.py:2142] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0423 16:04:41.646213 137110758524736 checkpoint_manager.py:2036] [process=5][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0. W0423 16:04:41.646359 137110758524736 checkpoint_manager.py:1458] Waiting for previous save to complete took 39.072322 seconds. If this number is high, consider checkpointing less frequently. I0423 16:04:41.648136 137110758524736 checkpoint_manager.py:1518] [process=5] Saving checkpoint at step 9 I0423 16:04:41.651686 137110758524736 async_checkpointer.py:452] [process=5] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_04_int8/checkpoints/9. I0423 16:04:42.208838 137110758524736 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array. I0423 16:04:42.208935 137110758524736 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False I0423 16:04:42.251160 137110758524736 base_pytree_checkpoint_handler.py:153] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.043629s I0423 16:04:42.251327 137110758524736 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/blocking_gbytes_per_sec: 5.205 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2963752746582031 s) (per-host) I0423 16:04:42.251379 137110758524736 base_pytree_checkpoint_handler.py:737] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.296437s (batch_requests_ready=0.250911s, total_serialization_initiated=0.045459s, others=0.000067s) I0423 16:04:42.251468 137110758524736 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.300573s (all_items=0.000016s, per_item={'items': '0.00001621'}, temp_paths=0.300557) I0423 16:04:42.252366 136978519553792 async_checkpointer.py:79] [process=5][thread=async_save] Background save thread started. I0423 16:04:42.252492 137110758524736 async_checkpointer.py:561] Finished blocking save. Time taken: 0.604287s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_04_int8/checkpoints/9. I0423 16:04:42.271619 137110758524736 checkpoint_manager.py:1566] [process=5][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0423 16:04:42.271935 136974711101184 async_checkpointer.py:265] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0423 16:04:42.272103 137110758524736 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_04_int8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776960242.574013, 'wait_for_prev_duration_secs': 39.07232213020325, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776960281.648175, 'checkpointer_blocking_duration_secs': 0.6045033931732178, 'get_old_steps_start_time': 1776960282.2526991, 'get_old_steps_duration_secs': 2.7179718017578125e-05, 'checkpoint_manager_blocking_start_time': 1776960242.5722954, 'checkpoint_manager_blocking_duration_secs': 39.699772357940674} I0423 16:04:42.272212 137110758524736 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0423 16:04:42.272257 137110758524736 checkpoint_manager.py:2024] [process=5][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 16:04:47.013745 136979593295616 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_04_int8/checkpoints/9/items/array_metadatas/process_5 I0423 16:05:24.689878 136978519553792 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/gbytes_per_sec: 36.963 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.734886169433594 s) (per-host) I0423 16:05:24.690002 136978519553792 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.437430s. I0423 16:05:32.990792 136978519553792 async_checkpointer.py:144] [process=5][thread=async_save] Background save thread done. Time taken: 50.738205s. I0423 16:05:32.991100 136974711101184 async_checkpointer.py:273] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 16:05:32.991220 136974711101184 async_checkpointer.py:283] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0423 16:05:32.991268 136974711101184 checkpoint_manager.py:2133] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0423 16:05:32.992908 136974711101184 checkpoint_manager.py:2142] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0423 16:05:32.993081 137110758524736 checkpoint_manager.py:2036] [process=5][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9. I0423 16:05:32.993233 137110758524736 checkpoint_manager.py:2013] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 16:05:32.993892 137110758524736 metric_logger.py:185] completed step: 9, seconds: 0.231, TFLOP/s/device: 58.797, Tokens/s/device: 8862.501, 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: Thu Apr 23 16:05:45 UTC 2026 EXIT_CODE=0