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XPK Start: Sat Apr 25 15:13:54 UTC 2026
2026-04-25 15:13:58.420137: 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 00:00:1777130038.432894      10 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered
E0000 00:00:1777130038.436750      10 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered
W0000 00:00:1777130038.447826      10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1777130038.447845      10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1777130038.447848      10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1777130038.447850      10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
2026-04-25 15:14:17.746177: 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)
I0425 15:14:18.269782 138956914530112 max_utils.py:273] Attempting to initialize the jax distributed system...
INFO:2026-04-25 15:14:27,310:jax._src.distributed:140: Starting JAX distributed service on [::]:8482
I0425 15:14:27.310603 138956914530112 distributed.py:140] Starting JAX distributed service on [::]:8482
INFO:2026-04-25 15:14:27,313:jax._src.distributed:157: Connecting to JAX distributed service on mt-05-fp8-vyrqd-slice-job-0-0.mt-05-fp8-vyrqd:8482
I0425 15:14:27.313007 138956914530112 distributed.py:157] Connecting to JAX distributed service on mt-05-fp8-vyrqd-slice-job-0-0.mt-05-fp8-vyrqd:8482
I0425 15:14:28.433000 138956914530112 max_utils.py:284] Jax distributed system initialized!
I0425 15:14:34.275407 138956914530112 max_utils.py:800] System Information: Jax Version: 0.8.1
I0425 15:14:34.275510 138956914530112 max_utils.py:801] System Information: Jaxlib Version: 0.8.1
I0425 15:14:34.275550 138956914530112 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
I0425 15:14:34.275584 138956914530112 train_utils.py:377] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0425 15:14:34.899965 138956914530112 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0425 15:14:34.900559 138956914530112 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0425 15:14:34.900761 138956914530112 checkpointing.py:688] Setting up checkpoint logger...
I0425 15:14:34.900812 138956914530112 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True
I0425 15:14:34.900855 138956914530112 pytree_checkpoint_handler.py:589] save_device_host_concurrent_bytes=None
I0425 15:14:34.901196 138956914530112 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 0x7e60e2378fe0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0425 15:14:37.809163 138956914530112 checkpointing.py:266] Enabling policy for fixed interval checkpointing.
I0425 15:14:37.809504 138956914530112 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 0x7e4e6bd759d0>}, handler_registry=None
I0425 15:14:37.809750 138956914530112 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e4e6bd759d0>` 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`.
I0425 15:14:37.809799 138956914530112 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e4e6bd7a870>` 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`.
I0425 15:14:37.809835 138956914530112 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 0x7e4e6bd759d0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e4e6bd759d0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e4e6bd7a870>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e4e6bd7a870>}).
I0425 15:14:37.810336 138956914530112 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.33
I0425 15:14:37.810414 138956914530112 async_checkpointer.py:177] [process=5][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7e4e6b4e0180> timeout: 600 secs and primary_host=0 for async checkpoint writes
I0425 15:14:38.903812 138956914530112 checkpoint_manager.py:1818] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_05_fp8/checkpoints
I0425 15:14:38.914889 138956914530112 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_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_05_fp8/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7e4e6bd7aae0>
I0425 15:14:38.915027 138956914530112 checkpointing.py:302] Checkpoint manager created!
I0425 15:14:40.022485 138956914530112 nnx_wrappers.py:455] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0425 15:14:40.022592 138956914530112 nnx_wrappers.py:455] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0425 15:14:40.415079 138956914530112 attentions.py:1084] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0425 15:14:40.415183 138956914530112 attentions.py:1084] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0425 15:14:40.431337 138956914530112 attentions.py:1085] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0425 15:14:40.431397 138956914530112 attentions.py:1085] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0425 15:14:40.491148 138956914530112 attentions.py:1150] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 15:14:40.491235 138956914530112 attentions.py:1150] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 15:14:40.507472 138956914530112 attentions.py:1151] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 15:14:40.507534 138956914530112 attentions.py:1151] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 15:14:40.523703 138956914530112 attentions.py:1152] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 15:14:40.523760 138956914530112 attentions.py:1152] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 15:14:40.553329 138956914530112 attentions.py:1193] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0425 15:14:40.553432 138956914530112 attentions.py:1193] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 15:14:40.614001 138956914530112 linears.py:541] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0425 15:14:40.614092 138956914530112 linears.py:541] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0425 15:14:41.081171 138956914530112 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint
I0425 15:14:41.081287 138956914530112 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0425 15:14:43.135389 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/input_amax_history
    Shape:     float32[16,1024]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.135513 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/input_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.135562 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/kernel_amax_history
    Shape:     float32[16,1024]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.135602 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/kernel_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.135638 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/output_grad_amax_history
    Shape:     float32[16,1024]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.135688 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/output_grad_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.135723 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/input_amax_history
    Shape:     float32[16,1024]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.135755 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/input_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.135785 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/kernel_amax_history
    Shape:     float32[16,1024]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.135815 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/kernel_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.135846 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/output_grad_amax_history
    Shape:     float32[16,1024]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.135875 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/output_grad_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.135906 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/input_amax_history
    Shape:     float32[16,1024]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.135936 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/input_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.135966 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/kernel_amax_history
    Shape:     float32[16,1024]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.135994 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/kernel_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.136024 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/output_grad_amax_history
    Shape:     float32[16,1024]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.136053 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/output_grad_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.136081 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/input_amax_history
    Shape:     float32[16,1024]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.136108 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/input_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.136135 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/kernel_amax_history
    Shape:     float32[16,1024]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.136162 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/kernel_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.136189 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/output_grad_amax_history
    Shape:     float32[16,1024]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.136216 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/output_grad_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.136243 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/input_amax_history
    Shape:     float32[16,1024]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.136277 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/input_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.136306 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/kernel_amax_history
    Shape:     float32[16,1024]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.136336 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/kernel_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.136363 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/output_grad_amax_history
    Shape:     float32[16,1024]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.136390 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/output_grad_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.136416 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/input_amax_history
    Shape:     float32[16,1024]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.136443 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/input_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.136470 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/kernel_amax_history
    Shape:     float32[16,1024]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.136496 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/kernel_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.136523 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/output_grad_amax_history
    Shape:     float32[16,1024]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.136549 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/output_grad_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.136575 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/input_amax_history
    Shape:     float32[16,1024]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.136603 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/input_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.136629 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/kernel_amax_history
    Shape:     float32[16,1024]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.136680 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/kernel_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.136711 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/output_grad_amax_history
    Shape:     float32[16,1024]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.136739 138956914530112 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/output_grad_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0425 15:14:43.136790 138956914530112 maxtext_utils.py:1740]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   PartitionSpec('norm',)
    Physical:  (None,)
I0425 15:14:43.136845 138956914530112 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)
I0425 15:14:43.136885 138956914530112 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)
I0425 15:14:43.136934 138956914530112 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')
I0425 15:14:43.136982 138956914530112 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)
I0425 15:14:43.137019 138956914530112 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)
I0425 15:14:43.137069 138956914530112 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)
I0425 15:14:43.137119 138956914530112 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')
I0425 15:14:43.137156 138956914530112 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)
I0425 15:14:43.137192 138956914530112 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)
I0425 15:14:43.137239 138956914530112 maxtext_utils.py:1740]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   PartitionSpec('embed', 'vocab')
    Physical:  ('fsdp', None)

I0425 15:14:43.137290 138956914530112 maxtext_utils.py:1740]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   PartitionSpec('vocab', 'embed')
    Physical:  (None, 'fsdp')
I0425 15:14:44.926423 138956914530112 train.py:158] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0425 15:14:44.926519 138956914530112 train.py:158] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0425 15:14:44.942373 138956914530112 train.py:165] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0425 15:14:44.942436 138956914530112 train.py:165] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0425 15:14:58.355632 138956914530112 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.
I0425 15:14:58.356684 138956914530112 metric_logger.py:289] number parameters: 1.105 billion
I0425 15:15:12.846416 138956914530112 checkpointing.py:794] Waiting for step 0 to finish before checkpoint...
I0425 15:15:13.013220 138956914530112 checkpointing.py:798] Waited 0.16678428649902344 seconds for step 0 to finish before starting checkpointing.
I0425 15:15:13.016000 138956914530112 checkpoint_manager.py:2013] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0425 15:15:13.017909 138956914530112 checkpoint_manager.py:1518] [process=5] Saving checkpoint at step 0
I0425 15:15:13.021117 138956914530112 async_checkpointer.py:452] [process=5] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_05_fp8/checkpoints/0.
I0425 15:15:13.619620 138956914530112 signaling_client.py:364] Using JaxDistributedSignalingClient
I0425 15:15:13.620719 138956914530112 jax_array_handlers.py:358] Scheduling D2H of 81 prioritized jax.Array.
I0425 15:15:13.620840 138956914530112 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
I0425 15:15:13.984089 138956914530112 base_pytree_checkpoint_handler.py:153] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.364585s
I0425 15:15:13.984265 138956914530112 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.382 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.6476328372955322 s) (per-host)
I0425 15:15:13.984316 138956914530112 base_pytree_checkpoint_handler.py:737] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.647696s (batch_requests_ready=0.277736s, total_serialization_initiated=0.369888s, others=0.000072s)
I0425 15:15:13.984425 138956914530112 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.651814s (all_items=0.000021s, per_item={'items': '0.00002050'}, temp_paths=0.651794)
I0425 15:15:13.985357 138833609881344 async_checkpointer.py:79] [process=5][thread=async_save] Background save thread started.
I0425 15:15:13.985484 138956914530112 async_checkpointer.py:561] Finished blocking save. Time taken: 0.967507s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_05_fp8/checkpoints/0.
I0425 15:15:14.134589 138956914530112 checkpoint_manager.py:1566] [process=5][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0425 15:15:14.134997 138831428826880 async_checkpointer.py:265] [process=5][thread=save_finalize] Waiting for background save thread=async_save.
I0425 15:15:14.135161 138956914530112 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777130113.0159802, 'wait_for_prev_duration_secs': 6.747245788574219e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777130113.0179484, 'checkpointer_blocking_duration_secs': 0.967731237411499, 'get_old_steps_start_time': 1777130113.9856992, 'get_old_steps_duration_secs': 2.47955322265625e-05, 'checkpoint_manager_blocking_start_time': 1777130113.0140688, 'checkpoint_manager_blocking_duration_secs': 1.121051549911499}
I0425 15:15:14.135287 138956914530112 checkpointing.py:409] Started an asynchronous checkpoint save for step 0
I0425 15:15:14.135343 138956914530112 max_utils.py:750] 
Memstats: After params initialized:
I0425 15:15:14.135402 138956914530112 max_utils.py:756] 	Using (GB) 0.45 / 31.25 (1.440000%) on TPU_18(process=5,(2,4,0,0))
I0425 15:15:14.135441 138956914530112 max_utils.py:756] 	Using (GB) 0.45 / 31.25 (1.440000%) on TPU_19(process=5,(3,4,0,0))
I0425 15:15:14.135468 138956914530112 max_utils.py:756] 	Using (GB) 0.45 / 31.25 (1.440000%) on TPU_22(process=5,(2,5,0,0))
I0425 15:15:14.135494 138956914530112 max_utils.py:756] 	Using (GB) 0.45 / 31.25 (1.440000%) on TPU_23(process=5,(3,5,0,0))
I0425 15:15:14.405003 138956914530112 metric_logger.py:185] completed step: 0, seconds: 14.490, TFLOP/s/device: 0.938, Tokens/s/device: 141.343, total_weights: 65536, loss: 10.874
I0425 15:15:14.588383 138956914530112 metric_logger.py:185] completed step: 1, seconds: 1.557, TFLOP/s/device: 8.728, Tokens/s/device: 1315.632, total_weights: 65536, loss: 10.874
I0425 15:15:15.010091 138956914530112 metric_logger.py:185] completed step: 2, seconds: 0.026, TFLOP/s/device: 523.589, Tokens/s/device: 78921.002, total_weights: 65536, loss: 10.816
I0425 15:15:15.168308 138956914530112 metric_logger.py:185] completed step: 3, seconds: 0.422, TFLOP/s/device: 32.172, Tokens/s/device: 4849.357, total_weights: 65536, loss: 10.431
I0425 15:15:15.485711 138956914530112 metric_logger.py:185] completed step: 4, seconds: 0.164, TFLOP/s/device: 83.078, Tokens/s/device: 12522.471, total_weights: 65536, loss: 9.992
I0425 15:15:15.491941 138956914530112 metric_logger.py:185] completed step: 5, seconds: 0.158, TFLOP/s/device: 85.984, Tokens/s/device: 12960.385, total_weights: 65536, loss: 9.549
I0425 15:15:35.568160 138956914530112 metric_logger.py:185] completed step: 6, seconds: 0.318, TFLOP/s/device: 42.730, Tokens/s/device: 6440.717, total_weights: 65536, loss: 9.111
I0425 15:15:35.726531 138956914530112 metric_logger.py:185] completed step: 7, seconds: 19.919, TFLOP/s/device: 0.682, Tokens/s/device: 102.815, total_weights: 65536, loss: 8.685
I0425 15:15:35.884703 138956914530112 metric_logger.py:185] completed step: 8, seconds: 0.163, TFLOP/s/device: 83.218, Tokens/s/device: 12543.486, total_weights: 65536, loss: 8.281
I0425 15:15:35.889688 138956914530112 checkpointing.py:794] Waiting for step 10 to finish before checkpoint...
I0425 15:15:36.201147 138956914530112 checkpointing.py:798] Waited 0.31142425537109375 seconds for step 10 to finish before starting checkpointing.
I0425 15:15:36.203762 138956914530112 checkpoint_manager.py:2024] [process=5][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0425 15:15:36.678382    2610 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0425 15:15:38.793344 138834096396032 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 81 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_05_fp8/checkpoints/0/items/array_metadatas/process_5
I0425 15:15:53.499108 138833609881344 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/gbytes_per_sec: 39.334 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 40.162426710128784 s) (per-host)
I0425 15:15:53.499228 138833609881344 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 39.513663s.
I0425 15:16:01.078222 138833609881344 async_checkpointer.py:144] [process=5][thread=async_save] Background save thread done. Time taken: 47.092641s.
I0425 15:16:01.078533 138831428826880 async_checkpointer.py:273] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save.
I0425 15:16:01.078682 138831428826880 async_checkpointer.py:283] [process=5][thread=save_finalize] No errors found in background save thread=async_save.
I0425 15:16:01.078734 138831428826880 checkpoint_manager.py:2133] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0425 15:16:01.080138 138831428826880 checkpoint_manager.py:2142] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0425 15:16:01.080313 138956914530112 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.
W0425 15:16:01.080444 138956914530112 checkpoint_manager.py:1458] Waiting for previous save to complete took 24.876688 seconds. If this number is high, consider checkpointing less frequently.
I0425 15:16:01.082438 138956914530112 checkpoint_manager.py:1518] [process=5] Saving checkpoint at step 10
I0425 15:16:01.085878 138956914530112 async_checkpointer.py:452] [process=5] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_05_fp8/checkpoints/10.
I0425 15:16:01.613861 138956914530112 jax_array_handlers.py:358] Scheduling D2H of 81 prioritized jax.Array.
I0425 15:16:01.613963 138956914530112 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
I0425 15:16:01.671529 138956914530112 base_pytree_checkpoint_handler.py:153] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.058653s
I0425 15:16:01.671711 138956914530112 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/blocking_gbytes_per_sec: 4.942 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.31218814849853516 s) (per-host)
I0425 15:16:01.671766 138956914530112 base_pytree_checkpoint_handler.py:737] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.312254s (batch_requests_ready=0.250069s, total_serialization_initiated=0.062112s, others=0.000073s)
I0425 15:16:01.671870 138956914530112 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.316143s (all_items=0.000015s, per_item={'items': '0.00001550'}, temp_paths=0.316127)
I0425 15:16:01.672712 138831957305088 async_checkpointer.py:79] [process=5][thread=async_save] Background save thread started.
I0425 15:16:01.672880 138956914530112 async_checkpointer.py:561] Finished blocking save. Time taken: 0.590370s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_05_fp8/checkpoints/10.
I0425 15:16:02.111637 138956914530112 checkpoint_manager.py:1566] [process=5][thread=MainThread][step=10] Starting CheckpointManager Save Finalize thread=save_finalize
I0425 15:16:02.112107 138831428826880 async_checkpointer.py:265] [process=5][thread=save_finalize] Waiting for background save thread=async_save.
I0425 15:16:02.112294 138956914530112 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777130136.2037332, 'wait_for_prev_duration_secs': 24.87668776512146, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777130161.0824773, 'checkpointer_blocking_duration_secs': 0.5905101299285889, 'get_old_steps_start_time': 1777130161.6730046, 'get_old_steps_duration_secs': 2.6464462280273438e-05, 'checkpoint_manager_blocking_start_time': 1777130136.2020557, 'checkpoint_manager_blocking_duration_secs': 25.910202026367188}
I0425 15:16:02.112413 138956914530112 checkpointing.py:409] Started an asynchronous checkpoint save for step 10
I0425 15:16:02.112870 138956914530112 metric_logger.py:185] completed step: 9, seconds: 0.158, TFLOP/s/device: 86.046, Tokens/s/device: 12969.741, total_weights: 65536, loss: 7.908
I0425 15:16:02.119641 138956914530112 metric_logger.py:185] completed step: 10, seconds: 0.158, TFLOP/s/device: 85.973, Tokens/s/device: 12958.827, total_weights: 65536, loss: 7.568
I0425 15:16:02.277332 138956914530112 metric_logger.py:185] completed step: 11, seconds: 26.228, TFLOP/s/device: 0.518, Tokens/s/device: 78.084, total_weights: 65536, loss: 7.288
I0425 15:16:02.435523 138956914530112 metric_logger.py:185] completed step: 12, seconds: 0.006, TFLOP/s/device: 2430.613, Tokens/s/device: 366368.515, total_weights: 65536, loss: 7.032
I0425 15:16:02.593778 138956914530112 metric_logger.py:185] completed step: 13, seconds: 0.159, TFLOP/s/device: 85.504, Tokens/s/device: 12888.123, total_weights: 65536, loss: 6.815
I0425 15:16:02.751893 138956914530112 metric_logger.py:185] completed step: 14, seconds: 0.158, TFLOP/s/device: 85.797, Tokens/s/device: 12932.232, total_weights: 65536, loss: 6.635
I0425 15:16:02.910072 138956914530112 metric_logger.py:185] completed step: 15, seconds: 0.158, TFLOP/s/device: 85.940, Tokens/s/device: 12953.745, total_weights: 65536, loss: 6.492
I0425 15:16:03.068120 138956914530112 metric_logger.py:185] completed step: 16, seconds: 0.158, TFLOP/s/device: 85.933, Tokens/s/device: 12952.762, total_weights: 65536, loss: 6.380
I0425 15:16:03.226390 138956914530112 metric_logger.py:185] completed step: 17, seconds: 0.159, TFLOP/s/device: 85.613, Tokens/s/device: 12904.527, total_weights: 65536, loss: 6.293
I0425 15:16:03.384541 138956914530112 metric_logger.py:185] completed step: 18, seconds: 0.158, TFLOP/s/device: 86.267, Tokens/s/device: 13003.092, total_weights: 65536, loss: 6.223
I0425 15:16:03.542484 138956914530112 checkpointing.py:794] Waiting for step 19 to finish before checkpoint...
I0425 15:16:03.543428 138956914530112 checkpointing.py:798] Waited 0.0009639263153076172 seconds for step 19 to finish before starting checkpointing.
I0425 15:16:03.545514 138956914530112 checkpoint_manager.py:2024] [process=5][thread=MainThread][step=10][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0425 15:16:07.360924 138831462397696 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 81 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_05_fp8/checkpoints/10/items/array_metadatas/process_5
I0425 15:16:43.697669 138831957305088 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/gbytes_per_sec: 37.313 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.33808994293213 s) (per-host)
I0425 15:16:43.697789 138831957305088 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.024959s.
I0425 15:16:50.256399 138831957305088 async_checkpointer.py:144] [process=5][thread=async_save] Background save thread done. Time taken: 48.583552s.
I0425 15:16:50.256715 138831428826880 async_checkpointer.py:273] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save.
I0425 15:16:50.256829 138831428826880 async_checkpointer.py:283] [process=5][thread=save_finalize] No errors found in background save thread=async_save.
I0425 15:16:50.256878 138831428826880 checkpoint_manager.py:2133] [process=5][thread=save_finalize][step=10] CheckpointManager Save Finalize is syncing with other hosts...
I0425 15:16:50.258393 138831428826880 checkpoint_manager.py:2142] [process=5][thread=save_finalize][step=10] CheckpointManager Save Finalize is done on all hosts.
I0425 15:16:50.258518 138956914530112 checkpoint_manager.py:2036] [process=5][thread=MainThread][step=10][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=10.
W0425 15:16:50.258598 138956914530112 checkpoint_manager.py:1458] Waiting for previous save to complete took 46.713097 seconds. If this number is high, consider checkpointing less frequently.
I0425 15:16:50.260156 138956914530112 checkpoint_manager.py:1518] [process=5] Saving checkpoint at step 19
I0425 15:16:50.263824 138956914530112 async_checkpointer.py:452] [process=5] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_05_fp8/checkpoints/19.
I0425 15:16:51.203862 138956914530112 jax_array_handlers.py:358] Scheduling D2H of 81 prioritized jax.Array.
I0425 15:16:51.203964 138956914530112 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
I0425 15:16:51.260159 138956914530112 base_pytree_checkpoint_handler.py:153] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.057338s
I0425 15:16:51.260328 138956914530112 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/blocking_gbytes_per_sec: 4.530 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.34053587913513184 s) (per-host)
I0425 15:16:51.260378 138956914530112 base_pytree_checkpoint_handler.py:737] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.340597s (batch_requests_ready=0.279794s, total_serialization_initiated=0.060736s, others=0.000067s)
I0425 15:16:51.260483 138956914530112 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.344701s (all_items=0.000010s, per_item={'items': '0.00001049'}, temp_paths=0.344691)
I0425 15:16:51.261326 138831462397696 async_checkpointer.py:79] [process=5][thread=async_save] Background save thread started.
I0425 15:16:51.261450 138956914530112 async_checkpointer.py:561] Finished blocking save. Time taken: 1.001229s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_05_fp8/checkpoints/19.
I0425 15:16:51.379065 138956914530112 checkpoint_manager.py:1566] [process=5][thread=MainThread][step=19] Starting CheckpointManager Save Finalize thread=save_finalize
I0425 15:16:51.379430 138831428826880 async_checkpointer.py:265] [process=5][thread=save_finalize] Waiting for background save thread=async_save.
I0425 15:16:51.379598 138956914530112 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777130163.5454876, 'wait_for_prev_duration_secs': 46.71309733390808, 'time_between_consecutive_saves_sec': 2.4653124809265137, 'checkpointer_blocking_start_time': 1777130210.260195, 'checkpointer_blocking_duration_secs': 1.0014231204986572, 'get_old_steps_start_time': 1777130211.2616322, 'get_old_steps_duration_secs': 3.337860107421875e-05, 'checkpoint_manager_blocking_start_time': 1777130163.5437198, 'checkpoint_manager_blocking_duration_secs': 47.83584523200989}
I0425 15:16:51.379721 138956914530112 checkpointing.py:409] Started an asynchronous checkpoint save for step 19
I0425 15:16:51.379766 138956914530112 checkpoint_manager.py:2024] [process=5][thread=MainThread][step=19][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0425 15:16:55.998197 138831454004992 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 81 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_05_fp8/checkpoints/19/items/array_metadatas/process_5
I0425 15:17:33.045205 138831462397696 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/gbytes_per_sec: 37.501 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.12537145614624 s) (per-host)
I0425 15:17:33.045323 138831462397696 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.783793s.
I0425 15:17:38.706441 138831462397696 async_checkpointer.py:144] [process=5][thread=async_save] Background save thread done. Time taken: 47.444896s.
I0425 15:17:38.706742 138831428826880 async_checkpointer.py:273] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save.
I0425 15:17:38.706861 138831428826880 async_checkpointer.py:283] [process=5][thread=save_finalize] No errors found in background save thread=async_save.
I0425 15:17:38.706908 138831428826880 checkpoint_manager.py:2133] [process=5][thread=save_finalize][step=19] CheckpointManager Save Finalize is syncing with other hosts...
I0425 15:17:38.708360 138831428826880 checkpoint_manager.py:2142] [process=5][thread=save_finalize][step=19] CheckpointManager Save Finalize is done on all hosts.
I0425 15:17:38.708524 138956914530112 checkpoint_manager.py:2036] [process=5][thread=MainThread][step=19][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=19.
I0425 15:17:38.708674 138956914530112 checkpoint_manager.py:2013] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0425 15:17:38.709325 138956914530112 metric_logger.py:185] completed step: 19, seconds: 0.158, TFLOP/s/device: 85.813, Tokens/s/device: 12934.682, total_weights: 65536, loss: 6.167
Per train step:
 Total TFLOPs: 13.59 
 split as 93.93% learnable weight flops and 6.07% attention flops
XPK End: Sat Apr 25 15:17:49 UTC 2026
EXIT_CODE=0