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XPK Start: Sun Apr 19 03:28:41 UTC 2026
2026-04-19 03:28:45.491696: 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 00:00:1776569325.504082      10 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered
E0000 00:00:1776569325.507939      10 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered
W0000 00:00:1776569325.519163      10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776569325.519182      10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776569325.519184      10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776569325.519186      10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
2026-04-19 03:29:04.513340: E external/local_xla/xla/stream_executor/cuda/cuda_platform.cc:51] failed call to cuInit: INTERNAL: CUDA error: Failed call to cuInit: UNKNOWN ERROR (303)
I0419 03:29:05.038861 132804013868864 max_utils.py:273] Attempting to initialize the jax distributed system...
INFO:2026-04-19 03:29:14,078:jax._src.distributed:140: Starting JAX distributed service on [::]:8482
I0419 03:29:14.078495 132804013868864 distributed.py:140] Starting JAX distributed service on [::]:8482
INFO:2026-04-19 03:29:14,080:jax._src.distributed:157: Connecting to JAX distributed service on mt-05-fp8-qr5hf-slice-job-0-0.mt-05-fp8-qr5hf:8482
I0419 03:29:14.080758 132804013868864 distributed.py:157] Connecting to JAX distributed service on mt-05-fp8-qr5hf-slice-job-0-0.mt-05-fp8-qr5hf:8482
I0419 03:29:16.021970 132804013868864 max_utils.py:284] Jax distributed system initialized!
I0419 03:29:21.800526 132804013868864 max_utils.py:800] System Information: Jax Version: 0.8.1
I0419 03:29:21.800637 132804013868864 max_utils.py:801] System Information: Jaxlib Version: 0.8.1
I0419 03:29:21.800689 132804013868864 max_utils.py:802] System Information: Jax Backend: PJRT C API
TFRT TPU v6 lite
Built on Nov 12 2025 14:16:36 (1762985796) cl/831091709
I0419 03:29:21.800724 132804013868864 train_utils.py:377] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0419 03:29:22.436388 132804013868864 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0419 03:29:22.436983 132804013868864 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0419 03:29:22.437167 132804013868864 checkpointing.py:688] Setting up checkpoint logger...
I0419 03:29:22.437218 132804013868864 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True
I0419 03:29:22.437273 132804013868864 pytree_checkpoint_handler.py:589] save_device_host_concurrent_bytes=None
I0419 03:29:22.437626 132804013868864 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 0x78c851375190>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0419 03:29:27.662836 132804013868864 checkpointing.py:266] Enabling policy for fixed interval checkpointing.
I0419 03:29:27.663180 132804013868864 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 0x78b5fe32d910>}, handler_registry=None
I0419 03:29:27.663426 132804013868864 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x78b5fe32d910>` for item "items" and save args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>` to `_handler_registry`.
I0419 03:29:27.663476 132804013868864 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x78b5fe333470>` for item "metrics" and save args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>` to `_handler_registry`.
I0419 03:29:27.663511 132804013868864 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 0x78b5fe32d910>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x78b5fe32d910>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x78b5fe333470>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x78b5fe333470>}).
I0419 03:29:27.664010 132804013868864 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.33
I0419 03:29:27.664089 132804013868864 async_checkpointer.py:177] [process=3][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x78b5fc4ec180> timeout: 600 secs and primary_host=0 for async checkpoint writes
I0419 03:29:28.891437 132804013868864 checkpoint_manager.py:1818] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_05_fp8/checkpoints
I0419 03:29:29.315036 132804013868864 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=10), preservation_policy=LatestN(n=None), prevent_write_metrics=False, enable_should_save_is_saving_in_progress_check=True, enable_per_process_directory_creation=False, lightweight_initialize=False), root_directory=gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_05_fp8/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x78b5ff348fe0>
I0419 03:29:29.315209 132804013868864 checkpointing.py:302] Checkpoint manager created!
I0419 03:29:30.400036 132804013868864 nnx_wrappers.py:455] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0419 03:29:30.400145 132804013868864 nnx_wrappers.py:455] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0419 03:29:30.774746 132804013868864 attentions.py:1084] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0419 03:29:30.774847 132804013868864 attentions.py:1084] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0419 03:29:30.790740 132804013868864 attentions.py:1085] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0419 03:29:30.790801 132804013868864 attentions.py:1085] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0419 03:29:30.850616 132804013868864 attentions.py:1150] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0419 03:29:30.850705 132804013868864 attentions.py:1150] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0419 03:29:30.866776 132804013868864 attentions.py:1151] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0419 03:29:30.866838 132804013868864 attentions.py:1151] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0419 03:29:30.882643 132804013868864 attentions.py:1152] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0419 03:29:30.882706 132804013868864 attentions.py:1152] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0419 03:29:30.906581 132804013868864 attentions.py:1193] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0419 03:29:30.906651 132804013868864 attentions.py:1193] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0419 03:29:30.970188 132804013868864 linears.py:541] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0419 03:29:30.970297 132804013868864 linears.py:541] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0419 03:29:31.434576 132804013868864 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint
I0419 03:29:31.434694 132804013868864 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0419 03:29:33.509917 132804013868864 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:  ()
I0419 03:29:33.510045 132804013868864 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/input_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0419 03:29:33.510097 132804013868864 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:  ()
I0419 03:29:33.510138 132804013868864 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/kernel_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0419 03:29:33.510175 132804013868864 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:  ()
I0419 03:29:33.510209 132804013868864 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:  ()
I0419 03:29:33.510262 132804013868864 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:  ()
I0419 03:29:33.510296 132804013868864 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/input_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0419 03:29:33.510327 132804013868864 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:  ()
I0419 03:29:33.510357 132804013868864 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/kernel_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0419 03:29:33.510387 132804013868864 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:  ()
I0419 03:29:33.510417 132804013868864 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:  ()
I0419 03:29:33.510449 132804013868864 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/input_amax_history
    Shape:     float32[16,1024]
    Logical:   PartitionSpec()
    Physical:  ()
I0419 03:29:33.510479 132804013868864 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/input_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0419 03:29:33.510509 132804013868864 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/kernel_amax_history
    Shape:     float32[16,1024]
    Logical:   PartitionSpec()
    Physical:  ()
I0419 03:29:33.510538 132804013868864 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/kernel_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0419 03:29:33.510569 132804013868864 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:  ()
I0419 03:29:33.510636 132804013868864 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/output_grad_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0419 03:29:33.510675 132804013868864 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:  ()
I0419 03:29:33.510706 132804013868864 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/input_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0419 03:29:33.510735 132804013868864 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:  ()
I0419 03:29:33.510763 132804013868864 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/kernel_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0419 03:29:33.510790 132804013868864 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:  ()
I0419 03:29:33.510818 132804013868864 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:  ()
I0419 03:29:33.510851 132804013868864 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:  ()
I0419 03:29:33.510878 132804013868864 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/input_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0419 03:29:33.510905 132804013868864 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:  ()
I0419 03:29:33.510932 132804013868864 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/kernel_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0419 03:29:33.510959 132804013868864 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:  ()
I0419 03:29:33.510986 132804013868864 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:  ()
I0419 03:29:33.511013 132804013868864 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:  ()
I0419 03:29:33.511040 132804013868864 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/input_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0419 03:29:33.511067 132804013868864 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:  ()
I0419 03:29:33.511096 132804013868864 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/kernel_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0419 03:29:33.511122 132804013868864 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:  ()
I0419 03:29:33.511149 132804013868864 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:  ()
I0419 03:29:33.511175 132804013868864 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:  ()
I0419 03:29:33.511202 132804013868864 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/input_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0419 03:29:33.511228 132804013868864 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:  ()
I0419 03:29:33.511267 132804013868864 maxtext_utils.py:1740]  params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/kernel_scale
    Shape:     float32[16,1]
    Logical:   PartitionSpec()
    Physical:  ()
I0419 03:29:33.511294 132804013868864 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:  ()
I0419 03:29:33.511320 132804013868864 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:  ()
I0419 03:29:33.511371 132804013868864 maxtext_utils.py:1740]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   PartitionSpec('norm',)
    Physical:  (None,)
I0419 03:29:33.511426 132804013868864 maxtext_utils.py:1740]  params/params/decoder/layers/mlp/wi_0/kernel
    Shape:     float32[2048,16,7168]
    Logical:   PartitionSpec('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0419 03:29:33.511465 132804013868864 maxtext_utils.py:1740]  params/params/decoder/layers/mlp/wi_1/kernel
    Shape:     float32[2048,16,7168]
    Logical:   PartitionSpec('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0419 03:29:33.511514 132804013868864 maxtext_utils.py:1740]  params/params/decoder/layers/mlp/wo/kernel
    Shape:     float32[7168,16,2048]
    Logical:   PartitionSpec('mlp', 'layers', 'embed')
    Physical:  (None, None, 'fsdp')
I0419 03:29:33.511560 132804013868864 maxtext_utils.py:1740]  params/params/decoder/layers/post_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   PartitionSpec('norm', 'layers')
    Physical:  (None, None)
I0419 03:29:33.511594 132804013868864 maxtext_utils.py:1740]  params/params/decoder/layers/pre_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   PartitionSpec('norm', 'layers')
    Physical:  (None, None)
I0419 03:29:33.511643 132804013868864 maxtext_utils.py:1740]  params/params/decoder/layers/self_attention/key/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   PartitionSpec('embed', 'layers', 'kv_heads', 'kv_head_dim')
    Physical:  ('fsdp', None, None, None)
I0419 03:29:33.511691 132804013868864 maxtext_utils.py:1740]  params/params/decoder/layers/self_attention/out/kernel
    Shape:     float32[16,16,128,2048]
    Logical:   PartitionSpec('heads', 'layers', 'kv', 'embed')
    Physical:  (None, None, None, 'fsdp')
I0419 03:29:33.511727 132804013868864 maxtext_utils.py:1740]  params/params/decoder/layers/self_attention/query/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   PartitionSpec('embed', 'layers', 'q_heads', 'kv')
    Physical:  ('fsdp', None, None, None)
I0419 03:29:33.511761 132804013868864 maxtext_utils.py:1740]  params/params/decoder/layers/self_attention/value/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   PartitionSpec('embed', 'layers', 'kv_heads', 'kv_head_dim')
    Physical:  ('fsdp', None, None, None)
I0419 03:29:33.511807 132804013868864 maxtext_utils.py:1740]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   PartitionSpec('embed', 'vocab')
    Physical:  ('fsdp', None)
I0419 03:29:33.511856 132804013868864 maxtext_utils.py:1740]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   PartitionSpec('vocab', 'embed')

    Physical:  (None, 'fsdp')
I0419 03:29:35.302157 132804013868864 train.py:158] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0419 03:29:35.302274 132804013868864 train.py:158] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0419 03:29:35.318097 132804013868864 train.py:165] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0419 03:29:35.318159 132804013868864 train.py:165] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0419 03:29:48.626638 132804013868864 max_utils.py:791] Total memory size: 1.5 GB, Output size: 0.4 GB, Temp size: 1.1 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB.
I0419 03:29:48.627705 132804013868864 metric_logger.py:289] number parameters: 1.105 billion
I0419 03:30:03.411557 132804013868864 checkpointing.py:794] Waiting for step 0 to finish before checkpoint...
I0419 03:30:03.578064 132804013868864 checkpointing.py:798] Waited 0.16648554801940918 seconds for step 0 to finish before starting checkpointing.
I0419 03:30:03.580872 132804013868864 checkpoint_manager.py:2013] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0419 03:30:03.582833 132804013868864 checkpoint_manager.py:1518] [process=3] Saving checkpoint at step 0
I0419 03:30:03.585977 132804013868864 async_checkpointer.py:452] [process=3] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_05_fp8/checkpoints/0.
I0419 03:30:05.878881 132804013868864 signaling_client.py:364] Using JaxDistributedSignalingClient
I0419 03:30:05.880062 132804013868864 jax_array_handlers.py:358] Scheduling D2H of 81 prioritized jax.Array.
I0419 03:30:05.880181 132804013868864 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False
I0419 03:30:06.241383 132804013868864 base_pytree_checkpoint_handler.py:153] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.362617s
I0419 03:30:06.241558 132804013868864 base_pytree_checkpoint_handler.py:129] [process=3] /jax/checkpoint/write/blocking_gbytes_per_sec: 1.034 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 1.492323637008667 s) (per-host)
I0419 03:30:06.241608 132804013868864 base_pytree_checkpoint_handler.py:737] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 1.492384s (batch_requests_ready=1.124292s, total_serialization_initiated=0.368023s, others=0.000069s)
I0419 03:30:06.241712 132804013868864 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.496563s (all_items=0.000018s, per_item={'items': '0.00001836'}, temp_paths=1.496545)
I0419 03:30:06.242690 132683652904704 async_checkpointer.py:79] [process=3][thread=async_save] Background save thread started.
I0419 03:30:06.242864 132804013868864 async_checkpointer.py:561] Finished blocking save. Time taken: 2.659959s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_05_fp8/checkpoints/0.
I0419 03:30:06.244798 132804013868864 checkpoint_manager.py:1566] [process=3][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0419 03:30:06.245103 132676707153664 async_checkpointer.py:265] [process=3][thread=save_finalize] Waiting for background save thread=async_save.
I0419 03:30:06.245228 132804013868864 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776569403.5808542, 'wait_for_prev_duration_secs': 6.508827209472656e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776569403.582873, 'checkpointer_blocking_duration_secs': 2.660097122192383, 'get_old_steps_start_time': 1776569406.2429917, 'get_old_steps_duration_secs': 2.5033950805664062e-05, 'checkpoint_manager_blocking_start_time': 1776569403.5788174, 'checkpoint_manager_blocking_duration_secs': 2.6663763523101807}
I0419 03:30:06.245419 132804013868864 checkpointing.py:409] Started an asynchronous checkpoint save for step 0
I0419 03:30:06.245483 132804013868864 max_utils.py:750] 
Memstats: After params initialized:
I0419 03:30:06.245536 132804013868864 max_utils.py:756] 	Using (GB) 0.45 / 31.25 (1.440000%) on TPU_10(process=3,(2,2,0,0))
I0419 03:30:06.245569 132804013868864 max_utils.py:756] 	Using (GB) 0.45 / 31.25 (1.440000%) on TPU_11(process=3,(3,2,0,0))
I0419 03:30:06.245596 132804013868864 max_utils.py:756] 	Using (GB) 0.45 / 31.25 (1.440000%) on TPU_14(process=3,(2,3,0,0))
I0419 03:30:06.245621 132804013868864 max_utils.py:756] 	Using (GB) 0.45 / 31.25 (1.440000%) on TPU_15(process=3,(3,3,0,0))
I0419 03:30:06.517832 132804013868864 metric_logger.py:185] completed step: 0, seconds: 14.784, TFLOP/s/device: 0.919, Tokens/s/device: 138.531, total_weights: 65536, loss: 10.874
I0419 03:30:06.701108 132804013868864 metric_logger.py:185] completed step: 1, seconds: 3.104, TFLOP/s/device: 4.377, Tokens/s/device: 659.724, total_weights: 65536, loss: 10.874
I0419 03:30:07.100787 132804013868864 metric_logger.py:185] completed step: 2, seconds: 0.026, TFLOP/s/device: 524.114, Tokens/s/device: 79000.154, total_weights: 65536, loss: 10.816
I0419 03:30:07.259378 132804013868864 metric_logger.py:185] completed step: 3, seconds: 0.400, TFLOP/s/device: 33.940, Tokens/s/device: 5115.843, total_weights: 65536, loss: 10.431
I0419 03:30:07.576983 132804013868864 metric_logger.py:185] completed step: 4, seconds: 0.163, TFLOP/s/device: 83.103, Tokens/s/device: 12526.147, total_weights: 65536, loss: 9.992
I0419 03:30:07.583022 132804013868864 metric_logger.py:185] completed step: 5, seconds: 0.158, TFLOP/s/device: 85.789, Tokens/s/device: 12931.089, total_weights: 65536, loss: 9.549
I0419 03:30:29.348296 132804013868864 metric_logger.py:185] completed step: 6, seconds: 0.318, TFLOP/s/device: 42.729, Tokens/s/device: 6440.515, total_weights: 65536, loss: 9.111
I0419 03:30:29.506648 132804013868864 metric_logger.py:185] completed step: 7, seconds: 21.608, TFLOP/s/device: 0.629, Tokens/s/device: 94.780, total_weights: 65536, loss: 8.685
I0419 03:30:29.665006 132804013868864 metric_logger.py:185] completed step: 8, seconds: 0.163, TFLOP/s/device: 83.286, Tokens/s/device: 12553.712, total_weights: 65536, loss: 8.281
I0419 03:30:29.669931 132804013868864 checkpointing.py:794] Waiting for step 10 to finish before checkpoint...
I0419 03:30:29.982008 132804013868864 checkpointing.py:798] Waited 0.3120417594909668 seconds for step 10 to finish before starting checkpointing.
I0419 03:30:29.984776 132804013868864 checkpoint_manager.py:2024] [process=3][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0419 03:30:32.084456    2599 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0419 03:30:35.482623 132683661297408 array_metadata_store.py:203] [process=3][thread=array_type_handler] Wrote 81 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_05_fp8/checkpoints/0/items/array_metadatas/process_3
I0419 03:30:47.159254 132683652904704 base_pytree_checkpoint_handler.py:129] [process=3] /jax/checkpoint/write/gbytes_per_sec: 37.250 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.409966707229614 s) (per-host)
I0419 03:30:47.159376 132683652904704 async_checkpointer.py:90] [process=3][thread=async_save] 3 Handler Commit operations completed. Time taken: 40.916577s.
I0419 03:30:58.432429 132683652904704 async_checkpointer.py:144] [process=3][thread=async_save] Background save thread done. Time taken: 52.189614s.
I0419 03:30:58.432710 132676707153664 async_checkpointer.py:273] [process=3][thread=save_finalize] Done with waiting for background save thread=async_save.
I0419 03:30:58.432831 132676707153664 async_checkpointer.py:283] [process=3][thread=save_finalize] No errors found in background save thread=async_save.
I0419 03:30:58.432882 132676707153664 checkpoint_manager.py:2133] [process=3][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0419 03:30:58.434521 132676707153664 checkpoint_manager.py:2142] [process=3][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0419 03:30:58.434684 132804013868864 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.
W0419 03:30:58.434809 132804013868864 checkpoint_manager.py:1458] Waiting for previous save to complete took 28.450038 seconds. If this number is high, consider checkpointing less frequently.
I0419 03:30:58.436935 132804013868864 checkpoint_manager.py:1518] [process=3] Saving checkpoint at step 10
I0419 03:30:58.440712 132804013868864 async_checkpointer.py:452] [process=3] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_05_fp8/checkpoints/10.
I0419 03:30:59.408547 132804013868864 jax_array_handlers.py:358] Scheduling D2H of 81 prioritized jax.Array.
I0419 03:30:59.408650 132804013868864 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False
I0419 03:30:59.463340 132804013868864 base_pytree_checkpoint_handler.py:153] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.056064s
I0419 03:30:59.463507 132804013868864 base_pytree_checkpoint_handler.py:129] [process=3] /jax/checkpoint/write/blocking_gbytes_per_sec: 5.016 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.3075563907623291 s) (per-host)
I0419 03:30:59.463561 132804013868864 base_pytree_checkpoint_handler.py:737] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.307620s (batch_requests_ready=0.248044s, total_serialization_initiated=0.059506s, others=0.000070s)
I0419 03:30:59.463663 132804013868864 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.311890s (all_items=0.000015s, per_item={'items': '0.00001454'}, temp_paths=0.311876)
I0419 03:30:59.464555 132676116055808 async_checkpointer.py:79] [process=3][thread=async_save] Background save thread started.
I0419 03:30:59.464726 132804013868864 async_checkpointer.py:561] Finished blocking save. Time taken: 1.027724s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_05_fp8/checkpoints/10.
I0419 03:30:59.923879 132804013868864 checkpoint_manager.py:1566] [process=3][thread=MainThread][step=10] Starting CheckpointManager Save Finalize thread=save_finalize
I0419 03:30:59.924306 132676707153664 async_checkpointer.py:265] [process=3][thread=save_finalize] Waiting for background save thread=async_save.
I0419 03:30:59.924482 132804013868864 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776569429.9847474, 'wait_for_prev_duration_secs': 28.45003843307495, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776569458.4369738, 'checkpointer_blocking_duration_secs': 1.0278599262237549, 'get_old_steps_start_time': 1776569459.4648533, 'get_old_steps_duration_secs': 2.5272369384765625e-05, 'checkpoint_manager_blocking_start_time': 1776569429.9829006, 'checkpoint_manager_blocking_duration_secs': 29.94154405593872}
I0419 03:30:59.924599 132804013868864 checkpointing.py:409] Started an asynchronous checkpoint save for step 10
I0419 03:30:59.925092 132804013868864 metric_logger.py:185] completed step: 9, seconds: 0.158, TFLOP/s/device: 85.842, Tokens/s/device: 12939.014, total_weights: 65536, loss: 7.908
I0419 03:30:59.932056 132804013868864 metric_logger.py:185] completed step: 10, seconds: 0.158, TFLOP/s/device: 85.842, Tokens/s/device: 12939.095, total_weights: 65536, loss: 7.568
I0419 03:31:00.090253 132804013868864 metric_logger.py:185] completed step: 11, seconds: 30.260, TFLOP/s/device: 0.449, Tokens/s/device: 67.679, total_weights: 65536, loss: 7.288
I0419 03:31:00.248556 132804013868864 metric_logger.py:185] completed step: 12, seconds: 0.006, TFLOP/s/device: 2365.859, Tokens/s/device: 356608.045, total_weights: 65536, loss: 7.032
I0419 03:31:00.406909 132804013868864 metric_logger.py:185] completed step: 13, seconds: 0.159, TFLOP/s/device: 85.253, Tokens/s/device: 12850.196, total_weights: 65536, loss: 6.815
I0419 03:31:00.565067 132804013868864 metric_logger.py:185] completed step: 14, seconds: 0.158, TFLOP/s/device: 85.807, Tokens/s/device: 12933.702, total_weights: 65536, loss: 6.635
I0419 03:31:00.723374 132804013868864 metric_logger.py:185] completed step: 15, seconds: 0.158, TFLOP/s/device: 85.891, Tokens/s/device: 12946.457, total_weights: 65536, loss: 6.492
I0419 03:31:00.881525 132804013868864 metric_logger.py:185] completed step: 16, seconds: 0.158, TFLOP/s/device: 85.864, Tokens/s/device: 12942.366, total_weights: 65536, loss: 6.380
I0419 03:31:01.039776 132804013868864 metric_logger.py:185] completed step: 17, seconds: 0.158, TFLOP/s/device: 85.791, Tokens/s/device: 12931.334, total_weights: 65536, loss: 6.293
I0419 03:31:01.197989 132804013868864 metric_logger.py:185] completed step: 18, seconds: 0.158, TFLOP/s/device: 85.959, Tokens/s/device: 12956.613, total_weights: 65536, loss: 6.223
I0419 03:31:01.355904 132804013868864 checkpointing.py:794] Waiting for step 19 to finish before checkpoint...
I0419 03:31:01.356901 132804013868864 checkpointing.py:798] Waited 0.0010094642639160156 seconds for step 19 to finish before starting checkpointing.
I0419 03:31:01.359063 132804013868864 checkpoint_manager.py:2024] [process=3][thread=MainThread][step=10][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0419 03:31:06.333789 132677202061056 array_metadata_store.py:203] [process=3][thread=array_type_handler] Wrote 81 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_05_fp8/checkpoints/10/items/array_metadatas/process_3
I0419 03:31:43.614849 132676116055808 base_pytree_checkpoint_handler.py:129] [process=3] /jax/checkpoint/write/gbytes_per_sec: 35.533 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 44.458847999572754 s) (per-host)
I0419 03:31:43.614967 132676116055808 async_checkpointer.py:90] [process=3][thread=async_save] 3 Handler Commit operations completed. Time taken: 44.150301s.
I0419 03:31:51.296245 132676116055808 async_checkpointer.py:144] [process=3][thread=async_save] Background save thread done. Time taken: 51.831549s.
I0419 03:31:51.296547 132676707153664 async_checkpointer.py:273] [process=3][thread=save_finalize] Done with waiting for background save thread=async_save.
I0419 03:31:51.296679 132676707153664 async_checkpointer.py:283] [process=3][thread=save_finalize] No errors found in background save thread=async_save.
I0419 03:31:51.296740 132676707153664 checkpoint_manager.py:2133] [process=3][thread=save_finalize][step=10] CheckpointManager Save Finalize is syncing with other hosts...
I0419 03:31:51.298746 132676707153664 checkpoint_manager.py:2142] [process=3][thread=save_finalize][step=10] CheckpointManager Save Finalize is done on all hosts.
I0419 03:31:51.298959 132804013868864 checkpoint_manager.py:2036] [process=3][thread=MainThread][step=10][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=10.
W0419 03:31:51.299083 132804013868864 checkpoint_manager.py:1458] Waiting for previous save to complete took 49.940031 seconds. If this number is high, consider checkpointing less frequently.
I0419 03:31:51.300709 132804013868864 checkpoint_manager.py:1518] [process=3] Saving checkpoint at step 19
I0419 03:31:51.304231 132804013868864 async_checkpointer.py:452] [process=3] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_05_fp8/checkpoints/19.
I0419 03:31:52.717336 132804013868864 jax_array_handlers.py:358] Scheduling D2H of 81 prioritized jax.Array.
I0419 03:31:52.717440 132804013868864 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False
I0419 03:31:52.774052 132804013868864 base_pytree_checkpoint_handler.py:153] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.057766s
I0419 03:31:52.774222 132804013868864 base_pytree_checkpoint_handler.py:129] [process=3] /jax/checkpoint/write/blocking_gbytes_per_sec: 4.965 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.3107290267944336 s) (per-host)
I0419 03:31:52.774287 132804013868864 base_pytree_checkpoint_handler.py:737] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.310805s (batch_requests_ready=0.249518s, total_serialization_initiated=0.061206s, others=0.000081s)
I0419 03:31:52.774392 132804013868864 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.315069s (all_items=0.000011s, per_item={'items': '0.00001121'}, temp_paths=0.315058)
I0419 03:31:52.775279 132677202061056 async_checkpointer.py:79] [process=3][thread=async_save] Background save thread started.
I0419 03:31:52.775436 132804013868864 async_checkpointer.py:561] Finished blocking save. Time taken: 1.474657s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_05_fp8/checkpoints/19.
I0419 03:31:53.226847 132804013868864 checkpoint_manager.py:1566] [process=3][thread=MainThread][step=19] Starting CheckpointManager Save Finalize thread=save_finalize
I0419 03:31:53.227207 132676707153664 async_checkpointer.py:265] [process=3][thread=save_finalize] Waiting for background save thread=async_save.
I0419 03:31:53.227391 132804013868864 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776569461.3590364, 'wait_for_prev_duration_secs': 49.940030574798584, 'time_between_consecutive_saves_sec': 2.92447566986084, 'checkpointer_blocking_start_time': 1776569511.3007493, 'checkpointer_blocking_duration_secs': 1.4747951030731201, 'get_old_steps_start_time': 1776569512.7755585, 'get_old_steps_duration_secs': 2.1219253540039062e-05, 'checkpoint_manager_blocking_start_time': 1776569461.3571763, 'checkpoint_manager_blocking_duration_secs': 51.87018179893494}
I0419 03:31:53.227525 132804013868864 checkpointing.py:409] Started an asynchronous checkpoint save for step 19
I0419 03:31:53.227568 132804013868864 checkpoint_manager.py:2024] [process=3][thread=MainThread][step=19][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0419 03:31:59.536285 132675088148224 array_metadata_store.py:203] [process=3][thread=array_type_handler] Wrote 81 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_05_fp8/checkpoints/19/items/array_metadatas/process_3
I0419 03:32:36.018118 132677202061056 base_pytree_checkpoint_handler.py:129] [process=3] /jax/checkpoint/write/gbytes_per_sec: 36.271 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 43.55458426475525 s) (per-host)
I0419 03:32:36.018250 132677202061056 async_checkpointer.py:90] [process=3][thread=async_save] 3 Handler Commit operations completed. Time taken: 43.242849s.
I0419 03:32:44.229851 132677202061056 async_checkpointer.py:144] [process=3][thread=async_save] Background save thread done. Time taken: 51.454446s.
I0419 03:32:44.230164 132676707153664 async_checkpointer.py:273] [process=3][thread=save_finalize] Done with waiting for background save thread=async_save.
I0419 03:32:44.230300 132676707153664 async_checkpointer.py:283] [process=3][thread=save_finalize] No errors found in background save thread=async_save.
I0419 03:32:44.230342 132676707153664 checkpoint_manager.py:2133] [process=3][thread=save_finalize][step=19] CheckpointManager Save Finalize is syncing with other hosts...
I0419 03:32:44.231553 132676707153664 checkpoint_manager.py:2142] [process=3][thread=save_finalize][step=19] CheckpointManager Save Finalize is done on all hosts.
I0419 03:32:44.231738 132804013868864 checkpoint_manager.py:2036] [process=3][thread=MainThread][step=19][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=19.
I0419 03:32:44.231889 132804013868864 checkpoint_manager.py:2013] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0419 03:32:44.232497 132804013868864 metric_logger.py:185] completed step: 19, seconds: 0.158, TFLOP/s/device: 85.814, Tokens/s/device: 12934.764, 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: Sun Apr 19 03:32:56 UTC 2026
EXIT_CODE=0