MaxView

XPK Start: Sat Apr 18 06:18:30 UTC 2026
PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used.
2026-04-18 06:18:54.991481: 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)
I0418 06:18:55.170172 135161681655616 max_utils.py:273] Attempting to initialize the jax distributed system...
I0418 06:19:04.212244 135161681655616 distributed.py:149] Starting JAX distributed service on [::]:8482
I0418 06:19:04.214720 135161681655616 distributed.py:172] Connecting to JAX distributed service on mt-05-fp8-yf4nh-slice-job-0-0.mt-05-fp8-yf4nh:8482
I0418 06:19:06.210536 135161681655616 max_utils.py:284] Jax distributed system initialized!
I0418 06:19:12.304371 135161681655616 max_utils.py:800] System Information: Jax Version: 0.9.2
I0418 06:19:12.304475 135161681655616 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0418 06:19:12.304516 135161681655616 max_utils.py:802] System Information: Jax Backend: PJRT C API
TFRT TPU v6 lite
Built on Mar 4 2026 11:32:08 (1772652728) cl/878335365
I0418 06:19:12.304550 135161681655616 train_utils.py:378] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0418 06:19:13.020353 135161681655616 maxtext_utils.py:1718] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0418 06:19:13.020947 135161681655616 maxtext_utils.py:1718] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0418 06:19:13.021140 135161681655616 checkpointing.py:688] Setting up checkpoint logger...
I0418 06:19:13.021189 135161681655616 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True
I0418 06:19:13.021236 135161681655616 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0418 06:19:13.021563 135161681655616 base_pytree_checkpoint_handler.py:441] 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 0x7aed2f38a9f0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0418 06:19:16.367126 135161681655616 checkpointing.py:266] Enabling policy for fixed interval checkpointing.
I0418 06:19:16.367370 135161681655616 checkpoint_manager.py:708] [process=3][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ad8cc639dc0>}, handler_registry=None
I0418 06:19:16.367605 135161681655616 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ad8cc639dc0>` 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`.
I0418 06:19:16.367667 135161681655616 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ad8cc63e5a0>` 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`.
I0418 06:19:16.367702 135161681655616 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 0x7ad8cc639dc0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ad8cc639dc0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ad8cc63e5a0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ad8cc63e5a0>}).
I0418 06:19:16.368005 135161681655616 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0418 06:19:16.368073 135161681655616 async_checkpointer.py:192] [process=3][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7ad8cc3d82c0> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0418 06:19:17.911777 135161681655616 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141/linen_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141_05_fp8/checkpoints
I0418 06:19:18.761210 135161681655616 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_trainstate_and_training_loop_20260418_060141/linen_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141_05_fp8/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7ad8cc63a0c0>
I0418 06:19:18.761392 135161681655616 checkpointing.py:302] Checkpoint manager created!
I0418 06:19:19.857199 135161681655616 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0418 06:19:19.857308 135161681655616 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0418 06:19:20.240718 135161681655616 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0418 06:19:20.240809 135161681655616 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0418 06:19:20.257245 135161681655616 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0418 06:19:20.257302 135161681655616 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0418 06:19:20.309743 135161681655616 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0418 06:19:20.309822 135161681655616 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0418 06:19:20.326358 135161681655616 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0418 06:19:20.326416 135161681655616 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0418 06:19:20.342863 135161681655616 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0418 06:19:20.342923 135161681655616 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0418 06:19:20.368211 135161681655616 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0418 06:19:20.368281 135161681655616 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0418 06:19:20.419598 135161681655616 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0418 06:19:20.419685 135161681655616 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0418 06:19:20.861510 135161681655616 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint
I0418 06:19:20.861742 135161681655616 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0418 06:19:22.775090 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/input_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.775205 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/input_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.775252 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/kernel_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.775291 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/kernel_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.775327 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/output_grad_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.775360 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/output_grad_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.775390 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/input_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.775420 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/input_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.775451 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/kernel_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.775480 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/kernel_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.775509 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/output_grad_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.775538 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/output_grad_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.775566 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/input_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.775593 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/input_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.775633 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/kernel_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.775666 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/kernel_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.775695 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/output_grad_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.775723 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/output_grad_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.775751 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/input_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.775778 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/input_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.775804 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/kernel_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.775830 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/kernel_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.775857 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/output_grad_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.775884 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/output_grad_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.775911 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/input_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.775937 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/input_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.775967 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/kernel_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.775995 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/kernel_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.776021 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/output_grad_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.776047 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/output_grad_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.776073 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/input_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.776101 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/input_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.776127 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/kernel_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.776153 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/kernel_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.776178 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/output_grad_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.776204 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/output_grad_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.776246 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/input_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.776278 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/input_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.776305 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/kernel_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.776332 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/kernel_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.776358 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/output_grad_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.776384 135161681655616 maxtext_utils.py:1821]  params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/output_grad_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 06:19:22.776432 135161681655616 maxtext_utils.py:1821]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  (None,)
I0418 06:19:22.776484 135161681655616 maxtext_utils.py:1821]  params/params/decoder/layers/mlp/wi_0/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0418 06:19:22.776520 135161681655616 maxtext_utils.py:1821]  params/params/decoder/layers/mlp/wi_1/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0418 06:19:22.776565 135161681655616 maxtext_utils.py:1821]  params/params/decoder/layers/mlp/wo/kernel
    Shape:     float32[7168,16,2048]
    Logical:   P('mlp', 'layers', 'embed')
    Physical:  (None, None, 'fsdp')
I0418 06:19:22.776610 135161681655616 maxtext_utils.py:1821]  params/params/decoder/layers/post_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0418 06:19:22.776656 135161681655616 maxtext_utils.py:1821]  params/params/decoder/layers/pre_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0418 06:19:22.776704 135161681655616 maxtext_utils.py:1821]  params/params/decoder/layers/self_attention/key/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   P('embed', 'layers', 'kv_heads', 'kv_head_dim')
    Physical:  ('fsdp', None, None, None)
I0418 06:19:22.776751 135161681655616 maxtext_utils.py:1821]  params/params/decoder/layers/self_attention/out/kernel
    Shape:     float32[16,16,128,2048]
    Logical:   P('heads', 'layers', 'kv', 'embed')
    Physical:  (None, None, None, 'fsdp')
I0418 06:19:22.776785 135161681655616 maxtext_utils.py:1821]  params/params/decoder/layers/self_attention/query/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   P('embed', 'layers', 'q_heads', 'kv')
    Physical:  ('fsdp', None, None, None)
I0418 06:19:22.776817 135161681655616 maxtext_utils.py:1821]  params/params/decoder/layers/self_attention/value/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   P('embed', 'layers', 'kv_heads', 'kv_head_dim')
    Physical:  ('fsdp', None, None, None)
I0418 06:19:22.776860 135161681655616 maxtext_utils.py:1821]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)

I0418 06:19:22.776901 135161681655616 maxtext_utils.py:1821]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')
I0418 06:19:24.414138 135161681655616 train.py:157] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0418 06:19:24.414236 135161681655616 train.py:157] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0418 06:19:24.430007 135161681655616 train.py:164] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0418 06:19:24.430068 135161681655616 train.py:164] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0418 06:19:38.117869 135161681655616 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.
I0418 06:19:38.118895 135161681655616 metric_logger.py:301] number parameters: 1.105 billion
I0418 06:19:53.396734 135161681655616 checkpointing.py:794] Waiting for step 0 to finish before checkpoint...
I0418 06:19:53.567125 135161681655616 checkpointing.py:798] Waited 0.17037630081176758 seconds for step 0 to finish before starting checkpointing.
I0418 06:19:53.569950 135161681655616 checkpoint_manager.py:2009] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0418 06:19:53.572006 135161681655616 checkpoint_manager.py:1512] [process=3] Saving checkpoint at step 0
I0418 06:19:53.573519 135161681655616 event_tracking.py:70] [process=3] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141/linen_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141_05_fp8/checkpoints/0.
I0418 06:19:54.316666 135161681655616 signaling_client.py:364] Using JaxDistributedSignalingClient
I0418 06:19:54.317649 135161681655616 jax_array_handlers.py:360] Scheduling D2H of 81 prioritized jax.Array.
I0418 06:19:54.317765 135161681655616 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
I0418 06:19:54.745546 135161681655616 base_pytree_checkpoint_handler.py:154] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.429012s
I0418 06:19:54.745759 135161681655616 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/blocking_gbytes_per_sec: 3.529 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.437150239944458 s) (per-host)
I0418 06:19:54.745815 135161681655616 base_pytree_checkpoint_handler.py:768] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.437217s (batch_requests_ready=0.003416s, total_serialization_initiated=0.433727s, others=0.000075s)
I0418 06:19:54.745924 135161681655616 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.441589s (all_items=0.000017s, per_item={'items': '0.00001693'}, temp_paths=0.441572)
I0418 06:19:54.746828 135161681655616 event_tracking.py:125] [process=3] [async] Finished blocking save in 1.17 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141/linen_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141_05_fp8/checkpoints/0.
I0418 06:19:54.747157 135031985125120 async_checkpointer.py:76] [process=3][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-18 06:39:54.747124
I0418 06:19:54.749273 135161681655616 checkpoint_manager.py:1560] [process=3][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0418 06:19:54.749578 135031462799104 async_checkpointer.py:280] [process=3][thread=save_finalize] Waiting for background save thread=async_save.
I0418 06:19:54.749752 135161681655616 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141/linen_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776493193.5699313, 'wait_for_prev_duration_secs': 6.413459777832031e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776493193.5720518, 'checkpointer_blocking_duration_secs': 1.1752653121948242, 'get_old_steps_start_time': 1776493194.7473435, 'get_old_steps_duration_secs': 3.0517578125e-05, 'checkpoint_manager_blocking_start_time': 1776493193.5677521, 'checkpoint_manager_blocking_duration_secs': 1.1819636821746826}
I0418 06:19:54.749867 135161681655616 checkpointing.py:409] Started an asynchronous checkpoint save for step 0
I0418 06:19:54.749919 135161681655616 max_utils.py:750] 
Memstats: After params initialized:
I0418 06:19:54.749969 135161681655616 max_utils.py:756] 	Using (GB) 0.45 / 31.25 (1.440000%) on TPU_10(process=3,(2,2,0,0))
I0418 06:19:54.750003 135161681655616 max_utils.py:756] 	Using (GB) 0.45 / 31.25 (1.440000%) on TPU_11(process=3,(3,2,0,0))
I0418 06:19:54.750030 135161681655616 max_utils.py:756] 	Using (GB) 0.45 / 31.25 (1.440000%) on TPU_14(process=3,(2,3,0,0))
I0418 06:19:54.750060 135161681655616 max_utils.py:756] 	Using (GB) 0.45 / 31.25 (1.440000%) on TPU_15(process=3,(3,3,0,0))
I0418 06:19:55.070693 135161681655616 metric_logger.py:196] completed step: 0, seconds: 15.278, TFLOP/s/device: 0.889, Tokens/s/device: 134.052, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52776.805
I0418 06:19:55.258723 135161681655616 metric_logger.py:196] completed step: 1, seconds: 1.672, TFLOP/s/device: 8.127, Tokens/s/device: 1225.000, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52761.840
I0418 06:19:55.684917 135161681655616 metric_logger.py:196] completed step: 2, seconds: 0.030, TFLOP/s/device: 446.681, Tokens/s/device: 67328.555, total_weights: 65536, loss: 10.816, lm_loss: 10.816, perplexity: 49832.398
I0418 06:19:55.843052 135161681655616 metric_logger.py:196] completed step: 3, seconds: 0.426, TFLOP/s/device: 31.878, Tokens/s/device: 4804.951, total_weights: 65536, loss: 10.431, lm_loss: 10.431, perplexity: 33901.820
I0418 06:19:56.160627 135161681655616 metric_logger.py:196] completed step: 4, seconds: 0.165, TFLOP/s/device: 82.321, Tokens/s/device: 12408.361, total_weights: 65536, loss: 9.992, lm_loss: 9.992, perplexity: 21847.639
I0418 06:19:56.166839 135161681655616 metric_logger.py:196] completed step: 5, seconds: 0.157, TFLOP/s/device: 86.318, Tokens/s/device: 13010.857, total_weights: 65536, loss: 9.549, lm_loss: 9.549, perplexity: 14035.006
I0418 06:19:58.599222    2818 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0418 06:20:01.488866 135031471191808 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_trainstate_and_training_loop_20260418_060141/linen_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141_05_fp8/checkpoints/0/items/array_metadatas/process_3
I0418 06:20:15.841762 135031985125120 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/gbytes_per_sec: 73.364 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 21.533114671707153 s) (per-host)
I0418 06:20:15.841885 135031985125120 async_checkpointer.py:90] [process=3][thread=async_save] 3 Handler Commit operations completed. Time taken: 21.094614s.
I0418 06:20:21.480381 135161681655616 metric_logger.py:196] completed step: 6, seconds: 0.318, TFLOP/s/device: 42.741, Tokens/s/device: 6442.359, total_weights: 65536, loss: 9.111, lm_loss: 9.111, perplexity: 9058.688
I0418 06:20:21.638868 135161681655616 metric_logger.py:196] completed step: 7, seconds: 25.156, TFLOP/s/device: 0.540, Tokens/s/device: 81.411, total_weights: 65536, loss: 8.685, lm_loss: 8.685, perplexity: 5914.720
I0418 06:20:21.797776 135161681655616 metric_logger.py:196] completed step: 8, seconds: 0.163, TFLOP/s/device: 83.205, Tokens/s/device: 12541.565, total_weights: 65536, loss: 8.281, lm_loss: 8.281, perplexity: 3950.010
I0418 06:20:21.802963 135161681655616 checkpointing.py:794] Waiting for step 10 to finish before checkpoint...
I0418 06:20:22.114559 135161681655616 checkpointing.py:798] Waited 0.31155872344970703 seconds for step 10 to finish before starting checkpointing.
I0418 06:20:22.117468 135161681655616 checkpoint_manager.py:2020] [process=3][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0418 06:20:25.463678 135031985125120 async_checkpointer.py:160] [process=3][thread=async_save] Background save thread done. Time taken: 30.716391s.
I0418 06:20:25.463946 135031462799104 async_checkpointer.py:288] [process=3][thread=save_finalize] Done with waiting for background save thread=async_save.
I0418 06:20:25.464086 135031462799104 async_checkpointer.py:298] [process=3][thread=save_finalize] No errors found in background save thread=async_save.
I0418 06:20:25.464138 135031462799104 checkpoint_manager.py:2137] [process=3][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0418 06:20:25.465829 135031462799104 checkpoint_manager.py:2146] [process=3][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0418 06:20:25.466002 135161681655616 checkpoint_manager.py:2032] [process=3][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0418 06:20:25.466144 135161681655616 checkpoint_manager.py:1452] Waiting for previous save to complete took 3.348676 seconds. If this number is high, consider checkpointing less frequently.
I0418 06:20:25.467920 135161681655616 checkpoint_manager.py:1512] [process=3] Saving checkpoint at step 10
I0418 06:20:25.469985 135161681655616 event_tracking.py:70] [process=3] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141/linen_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141_05_fp8/checkpoints/10.
I0418 06:20:26.625518 135161681655616 jax_array_handlers.py:360] Scheduling D2H of 81 prioritized jax.Array.
I0418 06:20:26.625628 135161681655616 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
I0418 06:20:26.679342 135161681655616 base_pytree_checkpoint_handler.py:154] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.054748s
I0418 06:20:26.679505 135161681655616 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/blocking_gbytes_per_sec: 25.358 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.0608372688293457 s) (per-host)
I0418 06:20:26.679553 135161681655616 base_pytree_checkpoint_handler.py:768] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.060895s (batch_requests_ready=0.003041s, total_serialization_initiated=0.057789s, others=0.000065s)
I0418 06:20:26.679670 135161681655616 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.065068s (all_items=0.000016s, per_item={'items': '0.00001645'}, temp_paths=0.065051)
I0418 06:20:26.680332 135161681655616 event_tracking.py:125] [process=3] [async] Finished blocking save in 1.21 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141/linen_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141_05_fp8/checkpoints/10.
I0418 06:20:26.680696 135031462799104 async_checkpointer.py:76] [process=3][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-18 06:40:26.680658
I0418 06:20:26.682729 135161681655616 checkpoint_manager.py:1560] [process=3][thread=MainThread][step=10] Starting CheckpointManager Save Finalize thread=save_finalize
I0418 06:20:26.683025 135026649851648 async_checkpointer.py:280] [process=3][thread=save_finalize] Waiting for background save thread=async_save.
I0418 06:20:26.683188 135161681655616 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141/linen_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776493222.1174383, 'wait_for_prev_duration_secs': 3.3486762046813965, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776493225.4679606, 'checkpointer_blocking_duration_secs': 1.2128863334655762, 'get_old_steps_start_time': 1776493226.6808684, 'get_old_steps_duration_secs': 3.0517578125e-05, 'checkpoint_manager_blocking_start_time': 1776493222.11545, 'checkpoint_manager_blocking_duration_secs': 4.567705154418945}
I0418 06:20:26.683300 135161681655616 checkpointing.py:409] Started an asynchronous checkpoint save for step 10
I0418 06:20:26.683932 135161681655616 metric_logger.py:196] completed step: 9, seconds: 0.159, TFLOP/s/device: 85.589, Tokens/s/device: 12900.950, total_weights: 65536, loss: 7.908, lm_loss: 7.908, perplexity: 2720.116
I0418 06:20:26.691419 135161681655616 metric_logger.py:196] completed step: 10, seconds: 0.159, TFLOP/s/device: 85.588, Tokens/s/device: 12900.787, total_weights: 65536, loss: 7.568, lm_loss: 7.568, perplexity: 1936.198
I0418 06:20:26.849731 135161681655616 metric_logger.py:196] completed step: 11, seconds: 4.886, TFLOP/s/device: 2.781, Tokens/s/device: 419.144, total_weights: 65536, loss: 7.288, lm_loss: 7.288, perplexity: 1463.272
I0418 06:20:27.008130 135161681655616 metric_logger.py:196] completed step: 12, seconds: 0.007, TFLOP/s/device: 2085.515, Tokens/s/device: 314351.497, total_weights: 65536, loss: 7.032, lm_loss: 7.032, perplexity: 1132.061
I0418 06:20:27.166672 135161681655616 metric_logger.py:196] completed step: 13, seconds: 0.159, TFLOP/s/device: 85.369, Tokens/s/device: 12867.716, total_weights: 65536, loss: 6.815, lm_loss: 6.815, perplexity: 911.031
I0418 06:20:27.715552 135161681655616 metric_logger.py:196] completed step: 14, seconds: 0.158, TFLOP/s/device: 85.775, Tokens/s/device: 12928.885, total_weights: 65536, loss: 6.635, lm_loss: 6.635, perplexity: 761.080
I0418 06:20:27.873968 135161681655616 metric_logger.py:196] completed step: 15, seconds: 0.544, TFLOP/s/device: 24.976, Tokens/s/device: 3764.685, total_weights: 65536, loss: 6.492, lm_loss: 6.492, perplexity: 659.915
I0418 06:20:28.032277 135161681655616 metric_logger.py:196] completed step: 16, seconds: 0.163, TFLOP/s/device: 83.132, Tokens/s/device: 12530.592, total_weights: 65536, loss: 6.380, lm_loss: 6.380, perplexity: 589.948
I0418 06:20:28.190550 135161681655616 metric_logger.py:196] completed step: 17, seconds: 0.158, TFLOP/s/device: 85.742, Tokens/s/device: 12923.990, total_weights: 65536, loss: 6.293, lm_loss: 6.293, perplexity: 540.941
I0418 06:20:28.348838 135161681655616 metric_logger.py:196] completed step: 18, seconds: 0.158, TFLOP/s/device: 85.748, Tokens/s/device: 12924.887, total_weights: 65536, loss: 6.223, lm_loss: 6.223, perplexity: 504.108
I0418 06:20:28.506333 135161681655616 checkpointing.py:794] Waiting for step 19 to finish before checkpoint...
I0418 06:20:28.507366 135161681655616 checkpointing.py:798] Waited 0.0010519027709960938 seconds for step 19 to finish before starting checkpointing.
I0418 06:20:28.509634 135161681655616 checkpoint_manager.py:2020] [process=3][thread=MainThread][step=10][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0418 06:20:34.021425 135029871077120 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_trainstate_and_training_loop_20260418_060141/linen_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141_05_fp8/checkpoints/10/items/array_metadatas/process_3
I0418 06:21:09.706747 135031462799104 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/gbytes_per_sec: 36.664 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 43.088019132614136 s) (per-host)
I0418 06:21:09.706868 135031462799104 async_checkpointer.py:90] [process=3][thread=async_save] 3 Handler Commit operations completed. Time taken: 43.026053s.
I0418 06:21:20.432472 135031462799104 async_checkpointer.py:160] [process=3][thread=async_save] Background save thread done. Time taken: 53.751642s.
I0418 06:21:20.432782 135026649851648 async_checkpointer.py:288] [process=3][thread=save_finalize] Done with waiting for background save thread=async_save.
I0418 06:21:20.432927 135026649851648 async_checkpointer.py:298] [process=3][thread=save_finalize] No errors found in background save thread=async_save.
I0418 06:21:20.432985 135026649851648 checkpoint_manager.py:2137] [process=3][thread=save_finalize][step=10] CheckpointManager Save Finalize is syncing with other hosts...
I0418 06:21:20.436120 135026649851648 checkpoint_manager.py:2146] [process=3][thread=save_finalize][step=10] CheckpointManager Save Finalize is done on all hosts.
I0418 06:21:20.436286 135161681655616 checkpoint_manager.py:2032] [process=3][thread=MainThread][step=10][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=10.
W0418 06:21:20.436408 135161681655616 checkpoint_manager.py:1452] Waiting for previous save to complete took 51.926797 seconds. If this number is high, consider checkpointing less frequently.
I0418 06:21:20.437901 135161681655616 checkpoint_manager.py:1512] [process=3] Saving checkpoint at step 19
I0418 06:21:20.439961 135161681655616 event_tracking.py:70] [process=3] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141/linen_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141_05_fp8/checkpoints/19.
I0418 06:21:21.136364 135161681655616 jax_array_handlers.py:360] Scheduling D2H of 81 prioritized jax.Array.
I0418 06:21:21.136459 135161681655616 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
I0418 06:21:21.189273 135161681655616 base_pytree_checkpoint_handler.py:154] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.053900s
I0418 06:21:21.189441 135161681655616 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/blocking_gbytes_per_sec: 25.671 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.06009650230407715 s) (per-host)
I0418 06:21:21.189491 135161681655616 base_pytree_checkpoint_handler.py:768] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.060156s (batch_requests_ready=0.003012s, total_serialization_initiated=0.057080s, others=0.000064s)
I0418 06:21:21.189591 135161681655616 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.064880s (all_items=0.000011s, per_item={'items': '0.00001073'}, temp_paths=0.064870)
I0418 06:21:21.190346 135161681655616 event_tracking.py:125] [process=3] [async] Finished blocking save in 0.75 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141/linen_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141_05_fp8/checkpoints/19.
I0418 06:21:21.190633 135026649851648 async_checkpointer.py:76] [process=3][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-18 06:41:21.190588
I0418 06:21:21.192677 135161681655616 checkpoint_manager.py:1560] [process=3][thread=MainThread][step=19] Starting CheckpointManager Save Finalize thread=save_finalize
I0418 06:21:21.192956 135029871077120 async_checkpointer.py:280] [process=3][thread=save_finalize] Waiting for background save thread=async_save.
I0418 06:21:21.193124 135161681655616 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141/linen_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776493228.5095882, 'wait_for_prev_duration_secs': 51.92679738998413, 'time_between_consecutive_saves_sec': 3.04371976852417, 'checkpointer_blocking_start_time': 1776493280.4379413, 'checkpointer_blocking_duration_secs': 0.7528541088104248, 'get_old_steps_start_time': 1776493281.1908126, 'get_old_steps_duration_secs': 2.5510787963867188e-05, 'checkpoint_manager_blocking_start_time': 1776493228.5076602, 'checkpoint_manager_blocking_duration_secs': 52.68543362617493}
I0418 06:21:21.193231 135161681655616 checkpointing.py:409] Started an asynchronous checkpoint save for step 19
I0418 06:21:21.193273 135161681655616 checkpoint_manager.py:2020] [process=3][thread=MainThread][step=19][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0418 06:21:27.153745 135026633066240 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_trainstate_and_training_loop_20260418_060141/linen_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141_05_fp8/checkpoints/19/items/array_metadatas/process_3
I0418 06:22:04.034579 135026649851648 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/gbytes_per_sec: 36.820 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.905192136764526 s) (per-host)
I0418 06:22:04.034706 135026649851648 async_checkpointer.py:90] [process=3][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.843942s.
I0418 06:22:14.011172 135026649851648 async_checkpointer.py:160] [process=3][thread=async_save] Background save thread done. Time taken: 52.820394s.
I0418 06:22:14.011442 135029871077120 async_checkpointer.py:288] [process=3][thread=save_finalize] Done with waiting for background save thread=async_save.
I0418 06:22:14.011571 135029871077120 async_checkpointer.py:298] [process=3][thread=save_finalize] No errors found in background save thread=async_save.
I0418 06:22:14.011633 135029871077120 checkpoint_manager.py:2137] [process=3][thread=save_finalize][step=19] CheckpointManager Save Finalize is syncing with other hosts...
I0418 06:22:14.013215 135029871077120 checkpoint_manager.py:2146] [process=3][thread=save_finalize][step=19] CheckpointManager Save Finalize is done on all hosts.
I0418 06:22:14.013383 135161681655616 checkpoint_manager.py:2032] [process=3][thread=MainThread][step=19][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=19.
I0418 06:22:14.013535 135161681655616 checkpoint_manager.py:2009] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0418 06:22:14.014599 135161681655616 metric_logger.py:196] completed step: 19, seconds: 0.158, TFLOP/s/device: 85.959, Tokens/s/device: 12956.613, total_weights: 65536, loss: 6.167, lm_loss: 6.167, perplexity: 476.947
Per train step:
 Total TFLOPs: 13.59 
 split as 93.93% learnable weight flops and 6.07% attention flops
XPK End: Sat Apr 18 06:22:26 UTC 2026
EXIT_CODE=0