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XPK Start: Thu Apr 23 07:31:34 UTC 2026
PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used.
`rope_parameters`'s factor field must be a float >= 1, got 40
`rope_parameters`'s beta_fast field must be a float, got 32
`rope_parameters`'s beta_slow field must be a float, got 1
DeepseekV32Config got `key=rope_scaling` in kwargs but hasn't set it as attribute. For RoPE standardization you need to set `self.rope_parameters` in model's config. 
2026-04-23 07:31:59.656801: E external/local_xla/xla/stream_executor/cuda/cuda_platform.cc:51] failed call to cuInit: INTERNAL: CUDA error: Failed call to cuInit: UNKNOWN ERROR (303)
I0423 07:31:59.870465 139373294970688 max_utils.py:273] Attempting to initialize the jax distributed system...
I0423 07:32:08.920689 139373294970688 distributed.py:149] Starting JAX distributed service on [::]:8482
I0423 07:32:08.923003 139373294970688 distributed.py:172] Connecting to JAX distributed service on mt-05-fp8-alg8t-slice-job-0-0.mt-05-fp8-alg8t:8482
I0423 07:32:10.788594 139373294970688 max_utils.py:284] Jax distributed system initialized!
I0423 07:32:16.918651 139373294970688 max_utils.py:800] System Information: Jax Version: 0.9.2
I0423 07:32:16.918759 139373294970688 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0423 07:32:16.918799 139373294970688 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
I0423 07:32:16.918837 139373294970688 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0423 07:32:17.615948 139373294970688 maxtext_utils.py:1604] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0423 07:32:17.616255 139373294970688 checkpointing.py:677] Setting up checkpoint logger...
I0423 07:32:17.616314 139373294970688 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True
I0423 07:32:17.616358 139373294970688 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0423 07:32:17.616718 139373294970688 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 0x7ec1bf7ee6c0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0423 07:32:20.997365 139373294970688 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0423 07:32:20.997617 139373294970688 checkpoint_manager.py:708] [process=6][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ead88209430>}, handler_registry=None
I0423 07:32:20.997881 139373294970688 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ead88209430>` for item "items" and save args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>` to `_handler_registry`.
I0423 07:32:20.997934 139373294970688 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ead880a89b0>` for item "metrics" and save args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>` to `_handler_registry`.
I0423 07:32:20.997978 139373294970688 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 0x7ead88209430>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ead88209430>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ead880a89b0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ead880a89b0>}).
I0423 07:32:20.998344 139373294970688 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0423 07:32:20.998443 139373294970688 async_checkpointer.py:192] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7ead607a96c0> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0423 07:32:21.929824 139373294970688 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_05_fp8/checkpoints
I0423 07:32:22.342839 139373294970688 checkpoint_manager.py:929] [process=6][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_main_20260423_071538/linen_xpk_main_20260423_071538_05_fp8/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7ead880a9ac0>
I0423 07:32:22.343015 139373294970688 checkpointing.py:301] Checkpoint manager created!
I0423 07:32:23.426989 139373294970688 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0423 07:32:23.427126 139373294970688 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0423 07:32:23.815335 139373294970688 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn').
I0423 07:32:23.815428 139373294970688 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0423 07:32:23.831877 139373294970688 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn').
I0423 07:32:23.831938 139373294970688 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0423 07:32:23.884871 139373294970688 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim').
I0423 07:32:23.884955 139373294970688 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0423 07:32:23.901546 139373294970688 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim').
I0423 07:32:23.901607 139373294970688 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0423 07:32:23.918048 139373294970688 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim').
I0423 07:32:23.918122 139373294970688 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0423 07:32:23.943580 139373294970688 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch_attn', 'activation_length_attn', 'activation_heads', 'activation_kv').
I0423 07:32:23.943653 139373294970688 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0423 07:32:23.994808 139373294970688 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0423 07:32:23.994889 139373294970688 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0423 07:32:24.426899 139373294970688 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0423 07:32:24.427016 139373294970688 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0423 07:32:26.345986 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/input_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.346121 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/input_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.346169 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/kernel_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.346214 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/kernel_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.346251 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/output_grad_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.346287 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/output_grad_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.346320 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/input_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.346351 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/input_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.346382 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/kernel_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.346411 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/kernel_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.346441 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/output_grad_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.346477 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/output_grad_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.346511 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/input_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.346543 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/input_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.346573 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/kernel_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.346601 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/kernel_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.346629 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/output_grad_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.346658 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/output_grad_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.346686 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/input_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.346713 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/input_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.346740 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/kernel_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.346768 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/kernel_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.346795 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/output_grad_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.346821 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/output_grad_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.346848 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/input_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.346874 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/input_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.346901 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/kernel_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.346927 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/kernel_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.346954 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/output_grad_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.346981 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/output_grad_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.347010 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/input_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.347037 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/input_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.347064 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/kernel_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.347091 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/kernel_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.347133 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/output_grad_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.347162 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/output_grad_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.347188 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/input_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.347247 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/input_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.347299 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/kernel_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.347333 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/kernel_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.347362 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/output_grad_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.347390 139373294970688 maxtext_utils.py:1707]  params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/output_grad_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0423 07:32:26.347440 139373294970688 maxtext_utils.py:1707]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  (None,)
I0423 07:32:26.347500 139373294970688 maxtext_utils.py:1707]  params/params/decoder/layers/mlp/wi_0/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0423 07:32:26.347538 139373294970688 maxtext_utils.py:1707]  params/params/decoder/layers/mlp/wi_1/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0423 07:32:26.347585 139373294970688 maxtext_utils.py:1707]  params/params/decoder/layers/mlp/wo/kernel
    Shape:     float32[7168,16,2048]
    Logical:   P('mlp', 'layers', 'embed')
    Physical:  (None, None, 'fsdp')
I0423 07:32:26.347630 139373294970688 maxtext_utils.py:1707]  params/params/decoder/layers/post_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0423 07:32:26.347663 139373294970688 maxtext_utils.py:1707]  params/params/decoder/layers/pre_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0423 07:32:26.347710 139373294970688 maxtext_utils.py:1707]  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)
I0423 07:32:26.347757 139373294970688 maxtext_utils.py:1707]  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')
I0423 07:32:26.347794 139373294970688 maxtext_utils.py:1707]  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)
I0423 07:32:26.347827 139373294970688 maxtext_utils.py:1707]  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)
I0423 07:32:26.347871 139373294970688 maxtext_utils.py:1707]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)
I0423 07:32:26.347914 139373294970688 maxtext_utils.py:1707]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')

I0423 07:32:27.969732 139373294970688 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0423 07:32:27.969832 139373294970688 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0423 07:32:27.985569 139373294970688 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0423 07:32:27.985629 139373294970688 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0423 07:32:41.867264 139373294970688 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.
I0423 07:32:41.868116 139373294970688 metric_logger.py:301] number parameters: 1.105 billion
I0423 07:32:57.006255 139373294970688 checkpointing.py:772] Waiting for step 0 to finish before checkpoint...
I0423 07:32:57.179013 139373294970688 checkpointing.py:776] Waited 0.17274188995361328 seconds for step 0 to finish before starting checkpointing.
I0423 07:32:57.181473 139373294970688 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0423 07:32:57.183639 139373294970688 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 0
I0423 07:32:57.185044 139373294970688 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_05_fp8/checkpoints/0.
I0423 07:32:57.536808 139373294970688 signaling_client.py:364] Using JaxDistributedSignalingClient
I0423 07:32:57.539361 139373294970688 jax_array_handlers.py:360] Scheduling D2H of 81 prioritized jax.Array.
I0423 07:32:57.539422 139373294970688 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False
I0423 07:32:57.956130 139373294970688 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.419444s
I0423 07:32:57.956305 139373294970688 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 3.607 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.4277513027191162 s) (per-host)
I0423 07:32:57.956357 139373294970688 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.427814s (batch_requests_ready=0.003576s, total_serialization_initiated=0.424168s, others=0.000070s)
I0423 07:32:57.956454 139373294970688 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.432122s (all_items=0.000018s, per_item={'items': '0.00001812'}, temp_paths=0.432104)
I0423 07:32:57.957205 139373294970688 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.77 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_05_fp8/checkpoints/0.
I0423 07:32:57.957540 139242940339968 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 07:52:57.957501
I0423 07:32:57.959526 139373294970688 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0423 07:32:57.959757 139242428688128 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0423 07:32:57.959854 139373294970688 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776929577.1814551, 'wait_for_prev_duration_secs': 6.818771362304688e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776929577.1836772, 'checkpointer_blocking_duration_secs': 0.774022102355957, 'get_old_steps_start_time': 1776929577.9577246, 'get_old_steps_duration_secs': 3.0279159545898438e-05, 'checkpoint_manager_blocking_start_time': 1776929577.1796067, 'checkpoint_manager_blocking_duration_secs': 0.7802093029022217}
I0423 07:32:57.960004 139373294970688 checkpointing.py:408] Started an asynchronous checkpoint save for step 0
I0423 07:32:57.960055 139373294970688 max_utils.py:750] 
Memstats: After params initialized:
I0423 07:32:57.960118 139373294970688 max_utils.py:756] 	Using (GB) 0.45 / 31.25 (1.440000%) on TPU_24(process=6,(0,6,0,0))
I0423 07:32:57.960156 139373294970688 max_utils.py:756] 	Using (GB) 0.45 / 31.25 (1.440000%) on TPU_25(process=6,(1,6,0,0))
I0423 07:32:57.960185 139373294970688 max_utils.py:756] 	Using (GB) 0.45 / 31.25 (1.440000%) on TPU_28(process=6,(0,7,0,0))
I0423 07:32:57.960210 139373294970688 max_utils.py:756] 	Using (GB) 0.45 / 31.25 (1.440000%) on TPU_29(process=6,(1,7,0,0))
I0423 07:32:58.274454 139373294970688 metric_logger.py:196] completed step: 0, seconds: 15.138, TFLOP/s/device: 0.898, Tokens/s/device: 135.288, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52776.805
I0423 07:32:58.477155 139373294970688 metric_logger.py:196] completed step: 1, seconds: 1.266, TFLOP/s/device: 10.731, Tokens/s/device: 1617.485, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52761.840
I0423 07:32:58.939247 139373294970688 metric_logger.py:196] completed step: 2, seconds: 0.045, TFLOP/s/device: 300.255, Tokens/s/device: 45257.668, total_weights: 65536, loss: 10.816, lm_loss: 10.816, perplexity: 49832.398
I0423 07:32:59.097347 139373294970688 metric_logger.py:196] completed step: 3, seconds: 0.462, TFLOP/s/device: 29.404, Tokens/s/device: 4432.066, total_weights: 65536, loss: 10.431, lm_loss: 10.431, perplexity: 33901.820
I0423 07:32:59.415153 139373294970688 metric_logger.py:196] completed step: 4, seconds: 0.164, TFLOP/s/device: 82.747, Tokens/s/device: 12472.518, total_weights: 65536, loss: 9.992, lm_loss: 9.992, perplexity: 21847.639
I0423 07:32:59.421382 139373294970688 metric_logger.py:196] completed step: 5, seconds: 0.158, TFLOP/s/device: 85.854, Tokens/s/device: 12940.894, total_weights: 65536, loss: 9.549, lm_loss: 9.549, perplexity: 14035.006
I0423 07:33:02.193426    2825 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0423 07:33:04.708017 139242437080832 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 81 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_05_fp8/checkpoints/0/items/array_metadatas/process_6
I0423 07:33:18.789169 139242940339968 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 74.305 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 21.26058292388916 s) (per-host)
I0423 07:33:18.789277 139242940339968 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 20.831622s.
I0423 07:33:25.474045 139373294970688 metric_logger.py:196] completed step: 6, seconds: 0.318, TFLOP/s/device: 42.737, Tokens/s/device: 6441.811, total_weights: 65536, loss: 9.111, lm_loss: 9.111, perplexity: 9058.688
I0423 07:33:25.632261 139373294970688 metric_logger.py:196] completed step: 7, seconds: 25.895, TFLOP/s/device: 0.525, Tokens/s/device: 79.088, total_weights: 65536, loss: 8.685, lm_loss: 8.685, perplexity: 5914.720
I0423 07:33:25.790932 139373294970688 metric_logger.py:196] completed step: 8, seconds: 0.164, TFLOP/s/device: 83.006, Tokens/s/device: 12511.607, total_weights: 65536, loss: 8.281, lm_loss: 8.281, perplexity: 3950.010
I0423 07:33:25.795874 139373294970688 checkpointing.py:772] Waiting for step 10 to finish before checkpoint...
I0423 07:33:26.107756 139373294970688 checkpointing.py:776] Waited 0.3118460178375244 seconds for step 10 to finish before starting checkpointing.
I0423 07:33:26.110548 139373294970688 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0423 07:33:29.500606 139242940339968 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 31.542934s.
I0423 07:33:29.500828 139242428688128 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0423 07:33:29.500886 139242428688128 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0423 07:33:29.500942 139242428688128 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0423 07:33:29.502681 139242428688128 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0423 07:33:29.502840 139373294970688 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0423 07:33:29.502973 139373294970688 checkpoint_manager.py:1452] Waiting for previous save to complete took 3.392425 seconds. If this number is high, consider checkpointing less frequently.
I0423 07:33:29.505077 139373294970688 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 10
I0423 07:33:29.507053 139373294970688 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_05_fp8/checkpoints/10.
I0423 07:33:30.097562 139373294970688 jax_array_handlers.py:360] Scheduling D2H of 81 prioritized jax.Array.
I0423 07:33:30.097655 139373294970688 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False
I0423 07:33:30.155774 139373294970688 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.059222s
I0423 07:33:30.155932 139373294970688 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 23.515 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.06560540199279785 s) (per-host)
I0423 07:33:30.155980 139373294970688 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.065662s (batch_requests_ready=0.003061s, total_serialization_initiated=0.062536s, others=0.000065s)
I0423 07:33:30.156073 139373294970688 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.069979s (all_items=0.000020s, per_item={'items': '0.00001955'}, temp_paths=0.069960)
I0423 07:33:30.156833 139373294970688 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.65 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_05_fp8/checkpoints/10.
I0423 07:33:30.157213 139239702370048 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 07:53:30.157176
I0423 07:33:30.159186 139373294970688 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=10] Starting CheckpointManager Save Finalize thread=save_finalize
I0423 07:33:30.159416 139242428688128 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0423 07:33:30.159518 139373294970688 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776929606.1105175, 'wait_for_prev_duration_secs': 3.3924248218536377, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776929609.505127, 'checkpointer_blocking_duration_secs': 0.6522328853607178, 'get_old_steps_start_time': 1776929610.1573834, 'get_old_steps_duration_secs': 2.9325485229492188e-05, 'checkpoint_manager_blocking_start_time': 1776929606.1086085, 'checkpoint_manager_blocking_duration_secs': 4.050875663757324}
I0423 07:33:30.159680 139373294970688 checkpointing.py:408] Started an asynchronous checkpoint save for step 10
I0423 07:33:30.160352 139373294970688 metric_logger.py:196] completed step: 9, seconds: 0.158, TFLOP/s/device: 85.911, Tokens/s/device: 12949.486, total_weights: 65536, loss: 7.908, lm_loss: 7.908, perplexity: 2720.116
I0423 07:33:30.167417 139373294970688 metric_logger.py:196] completed step: 10, seconds: 0.159, TFLOP/s/device: 85.718, Tokens/s/device: 12920.402, total_weights: 65536, loss: 7.568, lm_loss: 7.568, perplexity: 1936.198
I0423 07:33:30.325752 139373294970688 metric_logger.py:196] completed step: 11, seconds: 4.369, TFLOP/s/device: 3.110, Tokens/s/device: 468.729, total_weights: 65536, loss: 7.288, lm_loss: 7.288, perplexity: 1463.272
I0423 07:33:30.896339 139373294970688 metric_logger.py:196] completed step: 12, seconds: 0.006, TFLOP/s/device: 2121.000, Tokens/s/device: 319700.281, total_weights: 65536, loss: 7.032, lm_loss: 7.032, perplexity: 1132.061
I0423 07:33:31.054591 139373294970688 metric_logger.py:196] completed step: 13, seconds: 0.567, TFLOP/s/device: 23.984, Tokens/s/device: 3615.130, total_weights: 65536, loss: 6.815, lm_loss: 6.815, perplexity: 911.031
I0423 07:33:31.212941 139373294970688 metric_logger.py:196] completed step: 14, seconds: 0.163, TFLOP/s/device: 83.216, Tokens/s/device: 12543.178, total_weights: 65536, loss: 6.635, lm_loss: 6.635, perplexity: 761.080
I0423 07:33:31.371157 139373294970688 metric_logger.py:196] completed step: 15, seconds: 0.158, TFLOP/s/device: 85.870, Tokens/s/device: 12943.266, total_weights: 65536, loss: 6.492, lm_loss: 6.492, perplexity: 659.915
I0423 07:33:31.529217 139373294970688 metric_logger.py:196] completed step: 16, seconds: 0.158, TFLOP/s/device: 85.898, Tokens/s/device: 12947.439, total_weights: 65536, loss: 6.380, lm_loss: 6.380, perplexity: 589.948
I0423 07:33:31.687371 139373294970688 metric_logger.py:196] completed step: 17, seconds: 0.158, TFLOP/s/device: 85.833, Tokens/s/device: 12937.624, total_weights: 65536, loss: 6.293, lm_loss: 6.293, perplexity: 540.941
I0423 07:33:31.845711 139373294970688 metric_logger.py:196] completed step: 18, seconds: 0.158, TFLOP/s/device: 86.035, Tokens/s/device: 12968.099, total_weights: 65536, loss: 6.223, lm_loss: 6.223, perplexity: 504.108
I0423 07:33:32.003240 139373294970688 checkpointing.py:772] Waiting for step 19 to finish before checkpoint...
I0423 07:33:32.004149 139373294970688 checkpointing.py:776] Waited 0.0009305477142333984 seconds for step 19 to finish before starting checkpointing.
I0423 07:33:32.006573 139373294970688 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=10][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0423 07:33:37.373457 139240262870784 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 81 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_05_fp8/checkpoints/10/items/array_metadatas/process_6
I0423 07:34:12.478358 139239702370048 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 37.269 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.38797974586487 s) (per-host)
I0423 07:34:12.478490 139239702370048 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.321160s.
I0423 07:34:22.808341 139239702370048 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 52.650996s.
I0423 07:34:22.808561 139242428688128 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0423 07:34:22.808625 139242428688128 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0423 07:34:22.808672 139242428688128 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=10] CheckpointManager Save Finalize is syncing with other hosts...
I0423 07:34:22.811248 139242428688128 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=10] CheckpointManager Save Finalize is done on all hosts.
I0423 07:34:22.811438 139373294970688 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=10][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=10.
W0423 07:34:22.811580 139373294970688 checkpoint_manager.py:1452] Waiting for previous save to complete took 50.805012 seconds. If this number is high, consider checkpointing less frequently.
I0423 07:34:22.813238 139373294970688 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 19
I0423 07:34:22.815365 139373294970688 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_05_fp8/checkpoints/19.
I0423 07:34:23.520359 139373294970688 jax_array_handlers.py:360] Scheduling D2H of 81 prioritized jax.Array.
I0423 07:34:23.520456 139373294970688 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False
I0423 07:34:23.578991 139373294970688 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.059677s
I0423 07:34:23.579174 139373294970688 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 23.439 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.06581950187683105 s) (per-host)
I0423 07:34:23.579225 139373294970688 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.065882s (batch_requests_ready=0.002995s, total_serialization_initiated=0.062820s, others=0.000067s)
I0423 07:34:23.579337 139373294970688 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.070251s (all_items=0.000012s, per_item={'items': '0.00001168'}, temp_paths=0.070239)
I0423 07:34:23.580023 139373294970688 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.77 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_05_fp8/checkpoints/19.
I0423 07:34:23.580396 139242428688128 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 07:54:23.580352
I0423 07:34:23.582364 139373294970688 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=19] Starting CheckpointManager Save Finalize thread=save_finalize
I0423 07:34:23.582636 139240262870784 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0423 07:34:23.582767 139373294970688 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776929612.0065439, 'wait_for_prev_duration_secs': 50.80501198768616, 'time_between_consecutive_saves_sec': 2.5038228034973145, 'checkpointer_blocking_start_time': 1776929662.8132777, 'checkpointer_blocking_duration_secs': 0.7672295570373535, 'get_old_steps_start_time': 1776929663.580526, 'get_old_steps_duration_secs': 2.4557113647460938e-05, 'checkpoint_manager_blocking_start_time': 1776929612.0044262, 'checkpoint_manager_blocking_duration_secs': 51.57831048965454}
I0423 07:34:23.582931 139373294970688 checkpointing.py:408] Started an asynchronous checkpoint save for step 19
I0423 07:34:23.582974 139373294970688 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=19][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0423 07:34:30.448322 139242395117312 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 81 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_05_fp8/checkpoints/19/items/array_metadatas/process_6
I0423 07:35:05.930865 139242428688128 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 37.243 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.41748046875 s) (per-host)
I0423 07:35:05.930973 139242428688128 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.349913s.
I0423 07:35:15.871556 139242428688128 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 52.290481s.
I0423 07:35:15.871846 139240262870784 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0423 07:35:15.871965 139240262870784 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0423 07:35:15.872006 139240262870784 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=19] CheckpointManager Save Finalize is syncing with other hosts...
I0423 07:35:15.874220 139240262870784 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=19] CheckpointManager Save Finalize is done on all hosts.
I0423 07:35:15.874398 139373294970688 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=19][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=19.
I0423 07:35:15.874552 139373294970688 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0423 07:35:15.875467 139373294970688 metric_logger.py:196] completed step: 19, seconds: 0.158, TFLOP/s/device: 85.865, Tokens/s/device: 12942.448, 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: Thu Apr 23 07:35:24 UTC 2026
EXIT_CODE=0