MaxView

XPK Start: Sat Apr 18 18:15:50 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 18:16:15.220328: 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 18:16:15.401217 134511891793728 max_utils.py:273] Attempting to initialize the jax distributed system...
I0418 18:16:24.443118 134511891793728 distributed.py:149] Starting JAX distributed service on [::]:8482
I0418 18:16:24.445453 134511891793728 distributed.py:172] Connecting to JAX distributed service on mt-05-fp8-k1sow-slice-job-0-0.mt-05-fp8-k1sow:8482
I0418 18:16:25.863977 134511891793728 max_utils.py:284] Jax distributed system initialized!
I0418 18:16:31.954729 134511891793728 max_utils.py:800] System Information: Jax Version: 0.9.2
I0418 18:16:31.954830 134511891793728 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0418 18:16:31.954873 134511891793728 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 18:16:31.954908 134511891793728 train_utils.py:348] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0418 18:16:32.656683 134511891793728 maxtext_utils.py:1551] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0418 18:16:32.656968 134511891793728 checkpointing.py:677] Setting up checkpoint logger...
I0418 18:16:32.657022 134511891793728 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True
I0418 18:16:32.657068 134511891793728 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0418 18:16:32.657423 134511891793728 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 0x7a55e21181a0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0418 18:16:36.039294 134511891793728 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0418 18:16:36.039529 134511891793728 checkpoint_manager.py:708] [process=7][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7a41a011b3e0>}, handler_registry=None
I0418 18:16:36.039763 134511891793728 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7a41a011b3e0>` 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 18:16:36.039810 134511891793728 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a41a011b500>` 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 18:16:36.039845 134511891793728 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 0x7a41a011b3e0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7a41a011b3e0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a41a011b500>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a41a011b500>}).
I0418 18:16:36.040189 134511891793728 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0418 18:16:36.040256 134511891793728 async_checkpointer.py:192] [process=7][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7a40a840bc40> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0418 18:16:37.969893 134511891793728 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_05_fp8/checkpoints
I0418 18:16:38.806761 134511891793728 checkpoint_manager.py:929] [process=7][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_20260418_180002/linen_xpk_main_20260418_180002_05_fp8/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7a41a011bda0>
I0418 18:16:38.806934 134511891793728 checkpointing.py:301] Checkpoint manager created!
I0418 18:16:39.896669 134511891793728 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0418 18:16:39.896785 134511891793728 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0418 18:16:40.282787 134511891793728 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0418 18:16:40.282877 134511891793728 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0418 18:16:40.299135 134511891793728 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0418 18:16:40.299195 134511891793728 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0418 18:16:40.350816 134511891793728 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 18:16:40.350898 134511891793728 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0418 18:16:40.367596 134511891793728 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 18:16:40.367654 134511891793728 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0418 18:16:40.384371 134511891793728 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 18:16:40.384431 134511891793728 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0418 18:16:40.409204 134511891793728 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0418 18:16:40.409275 134511891793728 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0418 18:16:40.460380 134511891793728 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0418 18:16:40.460458 134511891793728 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0418 18:16:40.911127 134511891793728 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0418 18:16:40.911241 134511891793728 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0418 18:16:42.823501 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/input_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.823621 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/input_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.823669 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/kernel_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.823708 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/kernel_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.823744 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/output_grad_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.823778 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/output_grad_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.823812 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/input_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.823842 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/input_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.823872 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/kernel_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.823902 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/kernel_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.823931 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/output_grad_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.823960 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/output_grad_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.823989 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/input_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.824016 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/input_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.824044 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/kernel_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.824088 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/kernel_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.824123 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/output_grad_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.824171 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/output_grad_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.824203 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/input_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.824231 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/input_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.824260 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/kernel_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.824287 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/kernel_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.824315 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/output_grad_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.824342 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/output_grad_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.824370 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/input_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.824397 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/input_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.824424 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/kernel_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.824450 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/kernel_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.824476 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/output_grad_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.824503 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/output_grad_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.824529 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/input_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.824557 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/input_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.824584 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/kernel_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.824610 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/kernel_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.824636 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/output_grad_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.824662 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/output_grad_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.824688 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/input_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.824714 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/input_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.824741 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/kernel_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.824767 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/kernel_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.824793 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/output_grad_amax_history
    Shape:     float32[16,1024]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.824820 134511891793728 maxtext_utils.py:1654]  params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/output_grad_scale
    Shape:     float32[16,1]
    Logical:   P()
    Physical:  ()
I0418 18:16:42.824869 134511891793728 maxtext_utils.py:1654]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  (None,)
I0418 18:16:42.824922 134511891793728 maxtext_utils.py:1654]  params/params/decoder/layers/mlp/wi_0/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0418 18:16:42.824959 134511891793728 maxtext_utils.py:1654]  params/params/decoder/layers/mlp/wi_1/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0418 18:16:42.825007 134511891793728 maxtext_utils.py:1654]  params/params/decoder/layers/mlp/wo/kernel
    Shape:     float32[7168,16,2048]
    Logical:   P('mlp', 'layers', 'embed')
    Physical:  (None, None, 'fsdp')
I0418 18:16:42.825054 134511891793728 maxtext_utils.py:1654]  params/params/decoder/layers/post_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0418 18:16:42.825105 134511891793728 maxtext_utils.py:1654]  params/params/decoder/layers/pre_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0418 18:16:42.825155 134511891793728 maxtext_utils.py:1654]  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 18:16:42.825203 134511891793728 maxtext_utils.py:1654]  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 18:16:42.825237 134511891793728 maxtext_utils.py:1654]  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 18:16:42.825268 134511891793728 maxtext_utils.py:1654]  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 18:16:42.825311 134511891793728 maxtext_utils.py:1654]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)
I0418 18:16:42.825352 134511891793728 maxtext_utils.py:1654]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')

I0418 18:16:44.433262 134511891793728 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0418 18:16:44.433358 134511891793728 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0418 18:16:44.448648 134511891793728 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0418 18:16:44.448712 134511891793728 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0418 18:16:58.130581 134511891793728 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 18:16:58.131484 134511891793728 metric_logger.py:301] number parameters: 1.105 billion
I0418 18:17:13.271946 134511891793728 checkpointing.py:772] Waiting for step 0 to finish before checkpoint...
I0418 18:17:13.442163 134511891793728 checkpointing.py:776] Waited 0.1701948642730713 seconds for step 0 to finish before starting checkpointing.
I0418 18:17:13.445579 134511891793728 checkpoint_manager.py:2009] [process=7][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0418 18:17:13.447524 134511891793728 checkpoint_manager.py:1512] [process=7] Saving checkpoint at step 0
I0418 18:17:13.448919 134511891793728 event_tracking.py:70] [process=7] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_05_fp8/checkpoints/0.
I0418 18:17:14.206906 134511891793728 signaling_client.py:364] Using JaxDistributedSignalingClient
I0418 18:17:14.207857 134511891793728 jax_array_handlers.py:360] Scheduling D2H of 81 prioritized jax.Array.
I0418 18:17:14.207912 134511891793728 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 18:17:14.626933 134511891793728 base_pytree_checkpoint_handler.py:154] [process=7][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.420151s
I0418 18:17:14.627134 134511891793728 base_pytree_checkpoint_handler.py:130] [process=7] /jax/orbax/write/blocking_gbytes_per_sec: 3.600 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.4285409450531006 s) (per-host)
I0418 18:17:14.627191 134511891793728 base_pytree_checkpoint_handler.py:768] [process=7][thread=MainThread] Initiated Pytree async_save. Time taken: 0.428609s (batch_requests_ready=0.003613s, total_serialization_initiated=0.424919s, others=0.000077s)
I0418 18:17:14.627296 134511891793728 composite_checkpoint_handler.py:715] [process=7][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.432819s (all_items=0.000018s, per_item={'items': '0.00001764'}, temp_paths=0.432801)
I0418 18:17:14.628108 134511891793728 event_tracking.py:125] [process=7] [async] Finished blocking save in 1.18 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_05_fp8/checkpoints/0.
I0418 18:17:14.628461 134382346041088 async_checkpointer.py:76] [process=7][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-18 18:37:14.628423
I0418 18:17:14.631799 134511891793728 checkpoint_manager.py:1560] [process=7][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0418 18:17:14.632155 134382288758528 async_checkpointer.py:280] [process=7][thread=save_finalize] Waiting for background save thread=async_save.
I0418 18:17:14.632332 134511891793728 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776536233.445561, 'wait_for_prev_duration_secs': 6.222724914550781e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776536233.4475625, 'checkpointer_blocking_duration_secs': 1.181058645248413, 'get_old_steps_start_time': 1776536234.6286476, 'get_old_steps_duration_secs': 3.0279159545898438e-05, 'checkpoint_manager_blocking_start_time': 1776536233.4426782, 'checkpoint_manager_blocking_duration_secs': 1.1896164417266846}
I0418 18:17:14.632442 134511891793728 checkpointing.py:408] Started an asynchronous checkpoint save for step 0
I0418 18:17:14.632491 134511891793728 max_utils.py:750] 
Memstats: After params initialized:
I0418 18:17:14.632543 134511891793728 max_utils.py:756] 	Using (GB) 0.45 / 31.25 (1.440000%) on TPU_26(process=7,(2,6,0,0))
I0418 18:17:14.632578 134511891793728 max_utils.py:756] 	Using (GB) 0.45 / 31.25 (1.440000%) on TPU_27(process=7,(3,6,0,0))
I0418 18:17:14.632605 134511891793728 max_utils.py:756] 	Using (GB) 0.45 / 31.25 (1.440000%) on TPU_30(process=7,(2,7,0,0))
I0418 18:17:14.632628 134511891793728 max_utils.py:756] 	Using (GB) 0.45 / 31.25 (1.440000%) on TPU_31(process=7,(3,7,0,0))
I0418 18:17:14.947874 134511891793728 metric_logger.py:196] completed step: 0, seconds: 15.140, TFLOP/s/device: 0.897, Tokens/s/device: 135.268, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52776.805
I0418 18:17:15.143847 134511891793728 metric_logger.py:196] completed step: 1, seconds: 1.674, TFLOP/s/device: 8.117, Tokens/s/device: 1223.508, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52761.840
I0418 18:17:15.564787 134511891793728 metric_logger.py:196] completed step: 2, seconds: 0.038, TFLOP/s/device: 353.914, Tokens/s/device: 53345.836, total_weights: 65536, loss: 10.816, lm_loss: 10.816, perplexity: 49832.398
I0418 18:17:15.723206 134511891793728 metric_logger.py:196] completed step: 3, seconds: 0.421, TFLOP/s/device: 32.266, Tokens/s/device: 4863.464, total_weights: 65536, loss: 10.431, lm_loss: 10.431, perplexity: 33901.820
I0418 18:17:16.040598 134511891793728 metric_logger.py:196] completed step: 4, seconds: 0.164, TFLOP/s/device: 82.688, Tokens/s/device: 12463.562, total_weights: 65536, loss: 9.992, lm_loss: 9.992, perplexity: 21847.639
I0418 18:17:16.047224 134511891793728 metric_logger.py:196] completed step: 5, seconds: 0.158, TFLOP/s/device: 85.844, Tokens/s/device: 12939.341, total_weights: 65536, loss: 9.549, lm_loss: 9.549, perplexity: 14035.006
I0418 18:17:18.280435    2847 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0418 18:17:20.675175 134382297151232 array_metadata_store.py:203] [process=7][thread=array_type_handler] Wrote 81 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_05_fp8/checkpoints/0/items/array_metadatas/process_7
I0418 18:17:34.787708 134382346041088 base_pytree_checkpoint_handler.py:130] [process=7] /jax/orbax/write/gbytes_per_sec: 76.728 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 20.589051246643066 s) (per-host)
I0418 18:17:34.787839 134382346041088 async_checkpointer.py:90] [process=7][thread=async_save] 3 Handler Commit operations completed. Time taken: 20.159262s.
I0418 18:17:41.159799 134511891793728 metric_logger.py:196] completed step: 6, seconds: 0.318, TFLOP/s/device: 42.723, Tokens/s/device: 6439.705, total_weights: 65536, loss: 9.111, lm_loss: 9.111, perplexity: 9058.688
I0418 18:17:41.318297 134511891793728 metric_logger.py:196] completed step: 7, seconds: 24.955, TFLOP/s/device: 0.544, Tokens/s/device: 82.067, total_weights: 65536, loss: 8.685, lm_loss: 8.685, perplexity: 5914.720
I0418 18:17:41.476956 134511891793728 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 18:17:41.482017 134511891793728 checkpointing.py:772] Waiting for step 10 to finish before checkpoint...
I0418 18:17:41.793649 134511891793728 checkpointing.py:776] Waited 0.3115971088409424 seconds for step 10 to finish before starting checkpointing.
I0418 18:17:41.796318 134511891793728 checkpoint_manager.py:2020] [process=7][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0418 18:17:43.478874 134382346041088 async_checkpointer.py:160] [process=7][thread=async_save] Background save thread done. Time taken: 28.850281s.
I0418 18:17:43.479170 134382288758528 async_checkpointer.py:288] [process=7][thread=save_finalize] Done with waiting for background save thread=async_save.
I0418 18:17:43.479291 134382288758528 async_checkpointer.py:298] [process=7][thread=save_finalize] No errors found in background save thread=async_save.
I0418 18:17:43.479341 134382288758528 checkpoint_manager.py:2137] [process=7][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0418 18:17:43.480841 134382288758528 checkpoint_manager.py:2146] [process=7][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0418 18:17:43.481029 134511891793728 checkpoint_manager.py:2032] [process=7][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0418 18:17:43.481188 134511891793728 checkpoint_manager.py:1452] Waiting for previous save to complete took 1.684863 seconds. If this number is high, consider checkpointing less frequently.
I0418 18:17:43.483016 134511891793728 checkpoint_manager.py:1512] [process=7] Saving checkpoint at step 10
I0418 18:17:43.485008 134511891793728 event_tracking.py:70] [process=7] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_05_fp8/checkpoints/10.
I0418 18:17:44.229100 134511891793728 jax_array_handlers.py:360] Scheduling D2H of 81 prioritized jax.Array.
I0418 18:17:44.229199 134511891793728 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 18:17:44.266477 134511891793728 base_pytree_checkpoint_handler.py:154] [process=7][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.038349s
I0418 18:17:44.266637 134511891793728 base_pytree_checkpoint_handler.py:130] [process=7] /jax/orbax/write/blocking_gbytes_per_sec: 34.620 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04456162452697754 s) (per-host)
I0418 18:17:44.266689 134511891793728 base_pytree_checkpoint_handler.py:768] [process=7][thread=MainThread] Initiated Pytree async_save. Time taken: 0.044622s (batch_requests_ready=0.003103s, total_serialization_initiated=0.041452s, others=0.000068s)
I0418 18:17:44.266795 134511891793728 composite_checkpoint_handler.py:715] [process=7][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.049040s (all_items=0.000015s, per_item={'items': '0.00001502'}, temp_paths=0.049025)
I0418 18:17:44.267495 134511891793728 event_tracking.py:125] [process=7] [async] Finished blocking save in 0.78 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_05_fp8/checkpoints/10.
I0418 18:17:44.267876 134379091244800 async_checkpointer.py:76] [process=7][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-18 18:37:44.267838
I0418 18:17:44.273256 134511891793728 checkpoint_manager.py:1560] [process=7][thread=MainThread][step=10] Starting CheckpointManager Save Finalize thread=save_finalize
I0418 18:17:44.273501 134382288758528 async_checkpointer.py:280] [process=7][thread=save_finalize] Waiting for background save thread=async_save.
I0418 18:17:44.273635 134511891793728 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776536261.7962868, 'wait_for_prev_duration_secs': 1.6848626136779785, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776536263.4830546, 'checkpointer_blocking_duration_secs': 0.7849705219268799, 'get_old_steps_start_time': 1776536264.2680476, 'get_old_steps_duration_secs': 4.482269287109375e-05, 'checkpoint_manager_blocking_start_time': 1776536261.7944648, 'checkpoint_manager_blocking_duration_secs': 2.479135751724243}
I0418 18:17:44.273767 134511891793728 checkpointing.py:408] Started an asynchronous checkpoint save for step 10
I0418 18:17:44.274417 134511891793728 metric_logger.py:196] completed step: 9, seconds: 0.159, TFLOP/s/device: 85.670, Tokens/s/device: 12913.151, total_weights: 65536, loss: 7.908, lm_loss: 7.908, perplexity: 2720.116
I0418 18:17:44.281920 134511891793728 metric_logger.py:196] completed step: 10, seconds: 0.159, TFLOP/s/device: 85.677, Tokens/s/device: 12914.129, total_weights: 65536, loss: 7.568, lm_loss: 7.568, perplexity: 1936.198
I0418 18:17:44.439687 134511891793728 metric_logger.py:196] completed step: 11, seconds: 2.798, TFLOP/s/device: 4.857, Tokens/s/device: 732.043, total_weights: 65536, loss: 7.288, lm_loss: 7.288, perplexity: 1463.272
I0418 18:17:44.597949 134511891793728 metric_logger.py:196] completed step: 12, seconds: 0.006, TFLOP/s/device: 2103.922, Tokens/s/device: 317126.045, total_weights: 65536, loss: 7.032, lm_loss: 7.032, perplexity: 1132.061
I0418 18:17:45.155454 134511891793728 metric_logger.py:196] completed step: 13, seconds: 0.159, TFLOP/s/device: 85.361, Tokens/s/device: 12866.504, total_weights: 65536, loss: 6.815, lm_loss: 6.815, perplexity: 911.031
I0418 18:17:45.314314 134511891793728 metric_logger.py:196] completed step: 14, seconds: 0.552, TFLOP/s/device: 24.612, Tokens/s/device: 3709.748, total_weights: 65536, loss: 6.635, lm_loss: 6.635, perplexity: 761.080
I0418 18:17:45.472795 134511891793728 metric_logger.py:196] completed step: 15, seconds: 0.163, TFLOP/s/device: 83.261, Tokens/s/device: 12550.019, total_weights: 65536, loss: 6.492, lm_loss: 6.492, perplexity: 659.915
I0418 18:17:45.631316 134511891793728 metric_logger.py:196] completed step: 16, seconds: 0.159, TFLOP/s/device: 85.572, Tokens/s/device: 12898.350, total_weights: 65536, loss: 6.380, lm_loss: 6.380, perplexity: 589.948
I0418 18:17:45.789793 134511891793728 metric_logger.py:196] completed step: 17, seconds: 0.158, TFLOP/s/device: 85.789, Tokens/s/device: 12931.007, total_weights: 65536, loss: 6.293, lm_loss: 6.293, perplexity: 540.941
I0418 18:17:45.948246 134511891793728 metric_logger.py:196] completed step: 18, seconds: 0.159, TFLOP/s/device: 85.649, Tokens/s/device: 12909.895, total_weights: 65536, loss: 6.223, lm_loss: 6.223, perplexity: 504.108
I0418 18:17:46.106167 134511891793728 checkpointing.py:772] Waiting for step 19 to finish before checkpoint...
I0418 18:17:46.107165 134511891793728 checkpointing.py:776] Waited 0.001016855239868164 seconds for step 19 to finish before starting checkpointing.
I0418 18:17:46.109327 134511891793728 checkpoint_manager.py:2020] [process=7][thread=MainThread][step=10][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0418 18:17:52.134623 134379116422912 array_metadata_store.py:203] [process=7][thread=array_type_handler] Wrote 81 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_05_fp8/checkpoints/10/items/array_metadatas/process_7
I0418 18:18:27.760964 134379091244800 base_pytree_checkpoint_handler.py:130] [process=7] /jax/orbax/write/gbytes_per_sec: 36.284 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 43.53883337974548 s) (per-host)
I0418 18:18:27.761122 134379091244800 async_checkpointer.py:90] [process=7][thread=async_save] 3 Handler Commit operations completed. Time taken: 43.493122s.
I0418 18:18:35.815789 134379091244800 async_checkpointer.py:160] [process=7][thread=async_save] Background save thread done. Time taken: 51.547785s.
I0418 18:18:35.816120 134382288758528 async_checkpointer.py:288] [process=7][thread=save_finalize] Done with waiting for background save thread=async_save.
I0418 18:18:35.816241 134382288758528 async_checkpointer.py:298] [process=7][thread=save_finalize] No errors found in background save thread=async_save.
I0418 18:18:35.816288 134382288758528 checkpoint_manager.py:2137] [process=7][thread=save_finalize][step=10] CheckpointManager Save Finalize is syncing with other hosts...
I0418 18:18:35.817670 134382288758528 checkpoint_manager.py:2146] [process=7][thread=save_finalize][step=10] CheckpointManager Save Finalize is done on all hosts.
I0418 18:18:35.817838 134511891793728 checkpoint_manager.py:2032] [process=7][thread=MainThread][step=10][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=10.
W0418 18:18:35.817974 134511891793728 checkpoint_manager.py:1452] Waiting for previous save to complete took 49.708653 seconds. If this number is high, consider checkpointing less frequently.
I0418 18:18:35.819561 134511891793728 checkpoint_manager.py:1512] [process=7] Saving checkpoint at step 19
I0418 18:18:35.821613 134511891793728 event_tracking.py:70] [process=7] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_05_fp8/checkpoints/19.
I0418 18:18:36.537542 134511891793728 jax_array_handlers.py:360] Scheduling D2H of 81 prioritized jax.Array.
I0418 18:18:36.537636 134511891793728 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 18:18:36.574451 134511891793728 base_pytree_checkpoint_handler.py:154] [process=7][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.037921s
I0418 18:18:36.574618 134511891793728 base_pytree_checkpoint_handler.py:130] [process=7] /jax/orbax/write/blocking_gbytes_per_sec: 35.066 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04399561882019043 s) (per-host)
I0418 18:18:36.574666 134511891793728 base_pytree_checkpoint_handler.py:768] [process=7][thread=MainThread] Initiated Pytree async_save. Time taken: 0.044055s (batch_requests_ready=0.003006s, total_serialization_initiated=0.040984s, others=0.000065s)
I0418 18:18:36.574798 134511891793728 composite_checkpoint_handler.py:715] [process=7][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.048144s (all_items=0.000011s, per_item={'items': '0.00001097'}, temp_paths=0.048133)
I0418 18:18:36.575600 134511891793728 event_tracking.py:125] [process=7] [async] Finished blocking save in 0.76 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_05_fp8/checkpoints/19.
I0418 18:18:36.575882 134379116422912 async_checkpointer.py:76] [process=7][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-18 18:38:36.575847
I0418 18:18:36.579324 134511891793728 checkpoint_manager.py:1560] [process=7][thread=MainThread][step=19] Starting CheckpointManager Save Finalize thread=save_finalize
I0418 18:18:36.579679 134382288758528 async_checkpointer.py:280] [process=7][thread=save_finalize] Waiting for background save thread=async_save.
I0418 18:18:36.579843 134511891793728 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776536266.1092987, 'wait_for_prev_duration_secs': 49.70865297317505, 'time_between_consecutive_saves_sec': 2.62841796875, 'checkpointer_blocking_start_time': 1776536315.8195994, 'checkpointer_blocking_duration_secs': 0.7564229965209961, 'get_old_steps_start_time': 1776536316.576041, 'get_old_steps_duration_secs': 2.4318695068359375e-05, 'checkpoint_manager_blocking_start_time': 1776536266.1074467, 'checkpoint_manager_blocking_duration_secs': 50.47236251831055}
I0418 18:18:36.579961 134511891793728 checkpointing.py:408] Started an asynchronous checkpoint save for step 19
I0418 18:18:36.580003 134511891793728 checkpoint_manager.py:2020] [process=7][thread=MainThread][step=19][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0418 18:18:43.387330 134379653293824 array_metadata_store.py:203] [process=7][thread=array_type_handler] Wrote 81 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_05_fp8/checkpoints/19/items/array_metadatas/process_7
I0418 18:19:20.097202 134379116422912 base_pytree_checkpoint_handler.py:130] [process=7] /jax/orbax/write/gbytes_per_sec: 36.261 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 43.56653714179993 s) (per-host)
I0418 18:19:20.097328 134379116422912 async_checkpointer.py:90] [process=7][thread=async_save] 3 Handler Commit operations completed. Time taken: 43.521339s.
I0418 18:19:27.734118 134379116422912 async_checkpointer.py:160] [process=7][thread=async_save] Background save thread done. Time taken: 51.158081s.
I0418 18:19:27.734410 134382288758528 async_checkpointer.py:288] [process=7][thread=save_finalize] Done with waiting for background save thread=async_save.
I0418 18:19:27.734549 134382288758528 async_checkpointer.py:298] [process=7][thread=save_finalize] No errors found in background save thread=async_save.
I0418 18:19:27.734597 134382288758528 checkpoint_manager.py:2137] [process=7][thread=save_finalize][step=19] CheckpointManager Save Finalize is syncing with other hosts...
I0418 18:19:27.736280 134382288758528 checkpoint_manager.py:2146] [process=7][thread=save_finalize][step=19] CheckpointManager Save Finalize is done on all hosts.
I0418 18:19:27.736471 134511891793728 checkpoint_manager.py:2032] [process=7][thread=MainThread][step=19][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=19.
I0418 18:19:27.736625 134511891793728 checkpoint_manager.py:2009] [process=7][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0418 18:19:27.737592 134511891793728 metric_logger.py:196] completed step: 19, seconds: 0.158, TFLOP/s/device: 85.808, Tokens/s/device: 12933.866, 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 18:19:40 UTC 2026
EXIT_CODE=0