main (586e69205) vs feat/nnx-set-defaults-true (73213e044)| Metric | main 586e69205 | feat/nnx-set-defaults-true 73213e044 | Diff (feat/nnx-set-defaults-true − main) |
|---|---|---|---|
| Parameters | 1.105 billion | 1.105 billion | — |
| Final loss | 6.1670 | 6.1670 | 0 |
| TFLOP/s | 85.865 | 85.894 | +0.029 |
| Tok/s | 12942.4 | 12946.9 | +4.418 |
| Avg s/step | 1.825 | 2.652 | +0.827 |
| Memory % | 1.44 | 1.44 | 0 |
| JAX | 0.9.2 | 0.8.1 | — |
Diff = branch value − main value. Green = branch improved. Red = branch regressed.
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
XPK Start: Thu Apr 23 16:05:08 UTC 2026 2026-04-23 16:05:12.440847: E external/local_xla/xla/stream_executor/cuda/cuda_fft.cc:467] Unable to register cuFFT factory: Attempting to register factory for plugin cuFFT when one has already been registered WARNING: All log messages before absl::InitializeLog() is called are written to STDERR E0000 00:00:1776960312.453978 10 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered E0000 00:00:1776960312.457748 10 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered W0000 00:00:1776960312.469494 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776960312.469516 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776960312.469519 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776960312.469520 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. 2026-04-23 16:05:32.043786: 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 16:05:32.576167 135065090590528 max_utils.py:273] Attempting to initialize the jax distributed system... INFO:2026-04-23 16:05:41,617:jax._src.distributed:140: Starting JAX distributed service on [::]:8482 I0423 16:05:41.617328 135065090590528 distributed.py:140] Starting JAX distributed service on [::]:8482 INFO:2026-04-23 16:05:41,619:jax._src.distributed:157: Connecting to JAX distributed service on mt-05-fp8-ol59d-slice-job-0-0.mt-05-fp8-ol59d:8482 I0423 16:05:41.619678 135065090590528 distributed.py:157] Connecting to JAX distributed service on mt-05-fp8-ol59d-slice-job-0-0.mt-05-fp8-ol59d:8482 I0423 16:05:42.961057 135065090590528 max_utils.py:284] Jax distributed system initialized! I0423 16:05:49.942206 135065090590528 max_utils.py:800] System Information: Jax Version: 0.8.1 I0423 16:05:49.942315 135065090590528 max_utils.py:801] System Information: Jaxlib Version: 0.8.1 I0423 16:05:49.942355 135065090590528 max_utils.py:802] System Information: Jax Backend: PJRT C API TFRT TPU v6 lite Built on Nov 12 2025 14:16:36 (1762985796) cl/831091709 I0423 16:05:49.942389 135065090590528 train_utils.py:377] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0423 16:05:50.562815 135065090590528 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0423 16:05:50.563422 135065090590528 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0423 16:05:50.563610 135065090590528 checkpointing.py:688] Setting up checkpoint logger... I0423 16:05:50.563661 135065090590528 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0423 16:05:50.563705 135065090590528 pytree_checkpoint_handler.py:589] save_device_host_concurrent_bytes=None I0423 16:05:50.564050 135065090590528 base_pytree_checkpoint_handler.py:415] Created BasePyTreeCheckpointHandler: use_ocdbt=True, use_zarr3=True, pytree_metadata_options=PyTreeMetadataOptions(support_rich_types=False), array_metadata_store=<orbax.checkpoint._src.metadata.array_metadata_store.Store object at 0x7ad6d0574f20>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0423 16:05:53.481532 135065090590528 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0423 16:05:53.481768 135065090590528 checkpoint_manager.py:709] [process=6][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ac2a0563710>}, handler_registry=None I0423 16:05:53.481999 135065090590528 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ac2a0563710>` 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 16:05:53.482048 135065090590528 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ac2a0402fc0>` 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 16:05:53.482083 135065090590528 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 0x7ac2a0563710>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ac2a0563710>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ac2a0402fc0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ac2a0402fc0>}). I0423 16:05:53.482619 135065090590528 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.33 I0423 16:05:53.482697 135065090590528 async_checkpointer.py:177] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7ac2a00dc180> timeout: 600 secs and primary_host=0 for async checkpoint writes I0423 16:05:54.586621 135065090590528 checkpoint_manager.py:1818] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_05_fp8/checkpoints I0423 16:05:54.617139 135065090590528 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_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_05_fp8/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7ac2a03fcd70> I0423 16:05:54.617280 135065090590528 checkpointing.py:302] Checkpoint manager created! I0423 16:05:55.706727 135065090590528 nnx_wrappers.py:455] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0423 16:05:55.706834 135065090590528 nnx_wrappers.py:455] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 16:05:56.080466 135065090590528 attentions.py:1084] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 16:05:56.080572 135065090590528 attentions.py:1084] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 16:05:56.096447 135065090590528 attentions.py:1085] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 16:05:56.096508 135065090590528 attentions.py:1085] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 16:05:56.155763 135065090590528 attentions.py:1150] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 16:05:56.155851 135065090590528 attentions.py:1150] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 16:05:56.171778 135065090590528 attentions.py:1151] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 16:05:56.171840 135065090590528 attentions.py:1151] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 16:05:56.187651 135065090590528 attentions.py:1152] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 16:05:56.187712 135065090590528 attentions.py:1152] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 16:05:56.211541 135065090590528 attentions.py:1193] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0423 16:05:56.211608 135065090590528 attentions.py:1193] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 16:05:56.271437 135065090590528 linears.py:541] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0423 16:05:56.271529 135065090590528 linears.py:541] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0423 16:05:56.736485 135065090590528 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0423 16:05:56.736604 135065090590528 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0423 16:05:58.811722 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0423 16:05:58.811867 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0423 16:05:58.811935 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0423 16:05:58.811996 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0423 16:05:58.812055 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0423 16:05:58.812122 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0423 16:05:58.812177 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0423 16:05:58.812227 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0423 16:05:58.812277 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0423 16:05:58.812326 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0423 16:05:58.812375 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0423 16:05:58.812423 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0423 16:05:58.812471 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0423 16:05:58.812521 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0423 16:05:58.812567 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0423 16:05:58.812612 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0423 16:05:58.812657 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0423 16:05:58.812701 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0423 16:05:58.812746 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0423 16:05:58.812791 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0423 16:05:58.812834 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0423 16:05:58.812898 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0423 16:05:58.812946 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0423 16:05:58.812993 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0423 16:05:58.813036 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0423 16:05:58.813078 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0423 16:05:58.813140 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0423 16:05:58.813186 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0423 16:05:58.813229 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0423 16:05:58.813274 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0423 16:05:58.813319 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0423 16:05:58.813361 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0423 16:05:58.813402 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0423 16:05:58.813443 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0423 16:05:58.813484 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0423 16:05:58.813532 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0423 16:05:58.813574 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0423 16:05:58.813615 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0423 16:05:58.813656 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0423 16:05:58.813698 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0423 16:05:58.813739 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0423 16:05:58.813781 135065090590528 maxtext_utils.py:1740] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0423 16:05:58.813857 135065090590528 maxtext_utils.py:1740] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: PartitionSpec('norm',) Physical: (None,) I0423 16:05:58.813943 135065090590528 maxtext_utils.py:1740] params/params/decoder/layers/mlp/wi_0/kernel Shape: float32[2048,16,7168] Logical: PartitionSpec('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0423 16:05:58.814005 135065090590528 maxtext_utils.py:1740] params/params/decoder/layers/mlp/wi_1/kernel Shape: float32[2048,16,7168] Logical: PartitionSpec('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0423 16:05:58.814078 135065090590528 maxtext_utils.py:1740] params/params/decoder/layers/mlp/wo/kernel Shape: float32[7168,16,2048] Logical: PartitionSpec('mlp', 'layers', 'embed') Physical: (None, None, 'fsdp') I0423 16:05:58.814169 135065090590528 maxtext_utils.py:1740] params/params/decoder/layers/post_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: PartitionSpec('norm', 'layers') Physical: (None, None) I0423 16:05:58.814217 135065090590528 maxtext_utils.py:1740] params/params/decoder/layers/pre_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: PartitionSpec('norm', 'layers') Physical: (None, None) I0423 16:05:58.814280 135065090590528 maxtext_utils.py:1740] params/params/decoder/layers/self_attention/key/kernel Shape: float32[2048,16,16,128] Logical: PartitionSpec('embed', 'layers', 'kv_heads', 'kv_head_dim') Physical: ('fsdp', None, None, None) I0423 16:05:58.814343 135065090590528 maxtext_utils.py:1740] params/params/decoder/layers/self_attention/out/kernel Shape: float32[16,16,128,2048] Logical: PartitionSpec('heads', 'layers', 'kv', 'embed') Physical: (None, None, None, 'fsdp') I0423 16:05:58.814390 135065090590528 maxtext_utils.py:1740] params/params/decoder/layers/self_attention/query/kernel Shape: float32[2048,16,16,128] Logical: PartitionSpec('embed', 'layers', 'q_heads', 'kv') Physical: ('fsdp', None, None, None) I0423 16:05:58.814443 135065090590528 maxtext_utils.py:1740] params/params/decoder/layers/self_attention/value/kernel Shape: float32[2048,16,16,128] Logical: PartitionSpec('embed', 'layers', 'kv_heads', 'kv_head_dim') Physical: ('fsdp', None, None, None) I0423 16:05:58.814523 135065090590528 maxtext_utils.py:1740] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: PartitionSpec('embed', 'vocab') Physical: ('fsdp', None) I0423 16:05:58.814596 135065090590528 maxtext_utils.py:1740] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: PartitionSpec('vocab', 'embed') Physical: (None, 'fsdp') I0423 16:06:00.585002 135065090590528 train.py:158] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0423 16:06:00.585122 135065090590528 train.py:158] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0423 16:06:00.601186 135065090590528 train.py:165] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0423 16:06:00.601248 135065090590528 train.py:165] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0423 16:06:14.154530 135065090590528 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 16:06:14.155553 135065090590528 metric_logger.py:289] number parameters: 1.105 billion I0423 16:06:29.367814 135065090590528 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0423 16:06:29.534981 135065090590528 checkpointing.py:798] Waited 0.1671466827392578 seconds for step 0 to finish before starting checkpointing. I0423 16:06:29.537627 135065090590528 checkpoint_manager.py:2013] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 16:06:29.539731 135065090590528 checkpoint_manager.py:1518] [process=6] Saving checkpoint at step 0 I0423 16:06:29.543204 135065090590528 async_checkpointer.py:452] [process=6] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_05_fp8/checkpoints/0. I0423 16:06:30.501873 135065090590528 signaling_client.py:364] Using JaxDistributedSignalingClient I0423 16:06:30.502970 135065090590528 jax_array_handlers.py:358] Scheduling D2H of 81 prioritized jax.Array. I0423 16:06:30.503090 135065090590528 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 16:06:30.864833 135065090590528 base_pytree_checkpoint_handler.py:153] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.363075s I0423 16:06:30.865007 135065090590528 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/blocking_gbytes_per_sec: 1.568 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.9836323261260986 s) (per-host) I0423 16:06:30.865060 135065090590528 base_pytree_checkpoint_handler.py:737] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.983697s (batch_requests_ready=0.615247s, total_serialization_initiated=0.368377s, others=0.000073s) I0423 16:06:30.865188 135065090590528 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.988107s (all_items=0.000020s, per_item={'items': '0.00001955'}, temp_paths=0.988088) I0423 16:06:30.866159 134943074137856 async_checkpointer.py:79] [process=6][thread=async_save] Background save thread started. I0423 16:06:30.866332 135065090590528 async_checkpointer.py:561] Finished blocking save. Time taken: 1.326530s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_05_fp8/checkpoints/0. I0423 16:06:30.868233 135065090590528 checkpoint_manager.py:1566] [process=6][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0423 16:06:30.868472 134936623294208 async_checkpointer.py:265] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0423 16:06:30.868572 135065090590528 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776960389.5376086, 'wait_for_prev_duration_secs': 6.461143493652344e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776960389.5397723, 'checkpointer_blocking_duration_secs': 1.326664924621582, 'get_old_steps_start_time': 1776960390.8664565, 'get_old_steps_duration_secs': 2.47955322265625e-05, 'checkpoint_manager_blocking_start_time': 1776960389.5357678, 'checkpoint_manager_blocking_duration_secs': 1.332768201828003} I0423 16:06:30.868740 135065090590528 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0423 16:06:30.868791 135065090590528 max_utils.py:750] Memstats: After params initialized: I0423 16:06:30.868840 135065090590528 max_utils.py:756] Using (GB) 0.45 / 31.25 (1.440000%) on TPU_24(process=6,(0,6,0,0)) I0423 16:06:30.868874 135065090590528 max_utils.py:756] Using (GB) 0.45 / 31.25 (1.440000%) on TPU_25(process=6,(1,6,0,0)) I0423 16:06:30.868901 135065090590528 max_utils.py:756] Using (GB) 0.45 / 31.25 (1.440000%) on TPU_28(process=6,(0,7,0,0)) I0423 16:06:30.868927 135065090590528 max_utils.py:756] Using (GB) 0.45 / 31.25 (1.440000%) on TPU_29(process=6,(1,7,0,0)) I0423 16:06:31.142849 135065090590528 metric_logger.py:185] completed step: 0, seconds: 15.212, TFLOP/s/device: 0.893, Tokens/s/device: 134.629, total_weights: 65536, loss: 10.874 I0423 16:06:31.311390 135065090590528 metric_logger.py:185] completed step: 1, seconds: 1.773, TFLOP/s/device: 7.663, Tokens/s/device: 1155.099, total_weights: 65536, loss: 10.874 I0423 16:06:31.748642 135065090590528 metric_logger.py:185] completed step: 2, seconds: 0.012, TFLOP/s/device: 1175.662, Tokens/s/device: 177208.618, total_weights: 65536, loss: 10.816 I0423 16:06:31.906865 135065090590528 metric_logger.py:185] completed step: 3, seconds: 0.438, TFLOP/s/device: 31.042, Tokens/s/device: 4679.036, total_weights: 65536, loss: 10.431 I0423 16:06:32.224311 135065090590528 metric_logger.py:185] completed step: 4, seconds: 0.164, TFLOP/s/device: 83.061, Tokens/s/device: 12519.791, total_weights: 65536, loss: 9.992 I0423 16:06:32.230628 135065090590528 metric_logger.py:185] completed step: 5, seconds: 0.158, TFLOP/s/device: 85.947, Tokens/s/device: 12954.810, total_weights: 65536, loss: 9.549 I0423 16:06:52.442287 135065090590528 metric_logger.py:185] completed step: 6, seconds: 0.318, TFLOP/s/device: 42.754, Tokens/s/device: 6444.325, total_weights: 65536, loss: 9.111 I0423 16:06:52.600657 135065090590528 metric_logger.py:185] completed step: 7, seconds: 20.055, TFLOP/s/device: 0.677, Tokens/s/device: 102.120, total_weights: 65536, loss: 8.685 I0423 16:06:52.758766 135065090590528 metric_logger.py:185] completed step: 8, seconds: 0.163, TFLOP/s/device: 83.403, Tokens/s/device: 12571.358, total_weights: 65536, loss: 8.281 I0423 16:06:52.763940 135065090590528 checkpointing.py:794] Waiting for step 10 to finish before checkpoint... I0423 16:06:53.075478 135065090590528 checkpointing.py:798] Waited 0.31150197982788086 seconds for step 10 to finish before starting checkpointing. I0423 16:06:53.078171 135065090590528 checkpoint_manager.py:2024] [process=6][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 16:06:53.727502 2734 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0423 16:06:55.679287 134943082530560 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 81 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_05_fp8/checkpoints/0/items/array_metadatas/process_6 I0423 16:07:10.871809 134943074137856 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/gbytes_per_sec: 38.540 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 40.99037575721741 s) (per-host) I0423 16:07:10.871931 134943074137856 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 40.005654s. I0423 16:07:17.998222 134943074137856 async_checkpointer.py:144] [process=6][thread=async_save] Background save thread done. Time taken: 47.131928s. I0423 16:07:17.998513 134936623294208 async_checkpointer.py:273] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 16:07:17.998638 134936623294208 async_checkpointer.py:283] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0423 16:07:17.998698 134936623294208 checkpoint_manager.py:2133] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0423 16:07:18.001625 134936623294208 checkpoint_manager.py:2142] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0423 16:07:18.001798 135065090590528 checkpoint_manager.py:2036] [process=6][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0. W0423 16:07:18.001929 135065090590528 checkpoint_manager.py:1458] Waiting for previous save to complete took 24.923761 seconds. If this number is high, consider checkpointing less frequently. I0423 16:07:18.003907 135065090590528 checkpoint_manager.py:1518] [process=6] Saving checkpoint at step 10 I0423 16:07:18.007256 135065090590528 async_checkpointer.py:452] [process=6] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_05_fp8/checkpoints/10. I0423 16:07:18.558075 135065090590528 jax_array_handlers.py:358] Scheduling D2H of 81 prioritized jax.Array. I0423 16:07:18.558188 135065090590528 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 16:07:18.612643 135065090590528 base_pytree_checkpoint_handler.py:153] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.055664s I0423 16:07:18.612815 135065090590528 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/blocking_gbytes_per_sec: 4.898 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.31496524810791016 s) (per-host) I0423 16:07:18.612868 135065090590528 base_pytree_checkpoint_handler.py:737] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.315027s (batch_requests_ready=0.255859s, total_serialization_initiated=0.059098s, others=0.000070s) I0423 16:07:18.612966 135065090590528 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.319165s (all_items=0.000014s, per_item={'items': '0.00001431'}, temp_paths=0.319151) I0423 16:07:18.613877 134938225514240 async_checkpointer.py:79] [process=6][thread=async_save] Background save thread started. I0423 16:07:18.614031 135065090590528 async_checkpointer.py:561] Finished blocking save. Time taken: 0.610051s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_05_fp8/checkpoints/10. I0423 16:07:18.629308 135065090590528 checkpoint_manager.py:1566] [process=6][thread=MainThread][step=10] Starting CheckpointManager Save Finalize thread=save_finalize I0423 16:07:18.629613 134936623294208 async_checkpointer.py:265] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0423 16:07:18.629791 135065090590528 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776960413.0781426, 'wait_for_prev_duration_secs': 24.923760652542114, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776960438.0039477, 'checkpointer_blocking_duration_secs': 0.6102120876312256, 'get_old_steps_start_time': 1776960438.6141796, 'get_old_steps_duration_secs': 2.47955322265625e-05, 'checkpoint_manager_blocking_start_time': 1776960413.0764344, 'checkpoint_manager_blocking_duration_secs': 25.553322553634644} I0423 16:07:18.629899 135065090590528 checkpointing.py:409] Started an asynchronous checkpoint save for step 10 I0423 16:07:18.630274 135065090590528 metric_logger.py:185] completed step: 9, seconds: 0.158, TFLOP/s/device: 85.868, Tokens/s/device: 12942.939, total_weights: 65536, loss: 7.908 I0423 16:07:18.637667 135065090590528 metric_logger.py:185] completed step: 10, seconds: 0.158, TFLOP/s/device: 85.948, Tokens/s/device: 12955.056, total_weights: 65536, loss: 7.568 I0423 16:07:18.794850 135065090590528 metric_logger.py:185] completed step: 11, seconds: 25.872, TFLOP/s/device: 0.525, Tokens/s/device: 79.160, total_weights: 65536, loss: 7.288 I0423 16:07:18.953113 135065090590528 metric_logger.py:185] completed step: 12, seconds: 0.006, TFLOP/s/device: 2188.648, Tokens/s/device: 329896.907, total_weights: 65536, loss: 7.032 I0423 16:07:19.111330 135065090590528 metric_logger.py:185] completed step: 13, seconds: 0.158, TFLOP/s/device: 85.935, Tokens/s/device: 12953.089, total_weights: 65536, loss: 6.815 I0423 16:07:19.269370 135065090590528 metric_logger.py:185] completed step: 14, seconds: 0.158, TFLOP/s/device: 85.753, Tokens/s/device: 12925.621, total_weights: 65536, loss: 6.635 I0423 16:07:19.427584 135065090590528 metric_logger.py:185] completed step: 15, seconds: 0.158, TFLOP/s/device: 85.905, Tokens/s/device: 12948.585, total_weights: 65536, loss: 6.492 I0423 16:07:19.585695 135065090590528 metric_logger.py:185] completed step: 16, seconds: 0.158, TFLOP/s/device: 86.040, Tokens/s/device: 12968.838, total_weights: 65536, loss: 6.380 I0423 16:07:19.743845 135065090590528 metric_logger.py:185] completed step: 17, seconds: 0.158, TFLOP/s/device: 85.866, Tokens/s/device: 12942.611, total_weights: 65536, loss: 6.293 I0423 16:07:19.902164 135065090590528 metric_logger.py:185] completed step: 18, seconds: 0.158, TFLOP/s/device: 85.892, Tokens/s/device: 12946.539, total_weights: 65536, loss: 6.223 I0423 16:07:20.059953 135065090590528 checkpointing.py:794] Waiting for step 19 to finish before checkpoint... I0423 16:07:20.060964 135065090590528 checkpointing.py:798] Waited 0.0010313987731933594 seconds for step 19 to finish before starting checkpointing. I0423 16:07:20.062973 135065090590528 checkpoint_manager.py:2024] [process=6][thread=MainThread][step=10][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 16:07:23.380275 134937168557824 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 81 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_05_fp8/checkpoints/10/items/array_metadatas/process_6 I0423 16:08:00.441933 134938225514240 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/gbytes_per_sec: 37.485 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.144036054611206 s) (per-host) I0423 16:08:00.442055 134938225514240 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.828071s. I0423 16:08:09.283218 134938225514240 async_checkpointer.py:144] [process=6][thread=async_save] Background save thread done. Time taken: 50.669218s. I0423 16:08:09.283527 134936623294208 async_checkpointer.py:273] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 16:08:09.283648 134936623294208 async_checkpointer.py:283] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0423 16:08:09.283698 134936623294208 checkpoint_manager.py:2133] [process=6][thread=save_finalize][step=10] CheckpointManager Save Finalize is syncing with other hosts... I0423 16:08:09.285037 134936623294208 checkpoint_manager.py:2142] [process=6][thread=save_finalize][step=10] CheckpointManager Save Finalize is done on all hosts. I0423 16:08:09.285226 135065090590528 checkpoint_manager.py:2036] [process=6][thread=MainThread][step=10][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=10. W0423 16:08:09.285359 135065090590528 checkpoint_manager.py:1458] Waiting for previous save to complete took 49.222398 seconds. If this number is high, consider checkpointing less frequently. I0423 16:08:09.286893 135065090590528 checkpoint_manager.py:1518] [process=6] Saving checkpoint at step 19 I0423 16:08:09.290482 135065090590528 async_checkpointer.py:452] [process=6] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_05_fp8/checkpoints/19. I0423 16:08:09.852898 135065090590528 jax_array_handlers.py:358] Scheduling D2H of 81 prioritized jax.Array. I0423 16:08:09.852999 135065090590528 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 16:08:09.907621 135065090590528 base_pytree_checkpoint_handler.py:153] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.055860s I0423 16:08:09.907795 135065090590528 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/blocking_gbytes_per_sec: 5.071 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.3042416572570801 s) (per-host) I0423 16:08:09.907847 135065090590528 base_pytree_checkpoint_handler.py:737] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.304306s (batch_requests_ready=0.244973s, total_serialization_initiated=0.059264s, others=0.000070s) I0423 16:08:09.907950 135065090590528 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.308364s (all_items=0.000011s, per_item={'items': '0.00001073'}, temp_paths=0.308354) I0423 16:08:09.908802 134935537288960 async_checkpointer.py:79] [process=6][thread=async_save] Background save thread started. I0423 16:08:09.908928 135065090590528 async_checkpointer.py:561] Finished blocking save. Time taken: 0.621965s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_05_fp8/checkpoints/19. I0423 16:08:10.312308 135065090590528 checkpoint_manager.py:1566] [process=6][thread=MainThread][step=19] Starting CheckpointManager Save Finalize thread=save_finalize I0423 16:08:10.312734 134936623294208 async_checkpointer.py:265] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0423 16:08:10.312902 135065090590528 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776960440.0629456, 'wait_for_prev_duration_secs': 49.22239828109741, 'time_between_consecutive_saves_sec': 2.0612783432006836, 'checkpointer_blocking_start_time': 1776960489.2869337, 'checkpointer_blocking_duration_secs': 0.6221776008605957, 'get_old_steps_start_time': 1776960489.9091268, 'get_old_steps_duration_secs': 2.1457672119140625e-05, 'checkpoint_manager_blocking_start_time': 1776960440.0612586, 'checkpoint_manager_blocking_duration_secs': 50.2516074180603} I0423 16:08:10.313040 135065090590528 checkpointing.py:409] Started an asynchronous checkpoint save for step 19 I0423 16:08:10.313082 135065090590528 checkpoint_manager.py:2024] [process=6][thread=MainThread][step=19][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 16:08:15.118442 134937168557824 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 81 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_05_fp8/checkpoints/19/items/array_metadatas/process_6 I0423 16:08:51.929682 134935537288960 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/gbytes_per_sec: 37.324 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.326088190078735 s) (per-host) I0423 16:08:51.929805 134935537288960 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.020801s. I0423 16:08:59.929556 134935537288960 async_checkpointer.py:144] [process=6][thread=async_save] Background save thread done. Time taken: 50.020535s. I0423 16:08:59.929777 134936623294208 async_checkpointer.py:273] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 16:08:59.929840 134936623294208 async_checkpointer.py:283] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0423 16:08:59.929894 134936623294208 checkpoint_manager.py:2133] [process=6][thread=save_finalize][step=19] CheckpointManager Save Finalize is syncing with other hosts... I0423 16:08:59.931418 134936623294208 checkpoint_manager.py:2142] [process=6][thread=save_finalize][step=19] CheckpointManager Save Finalize is done on all hosts. I0423 16:08:59.931578 135065090590528 checkpoint_manager.py:2036] [process=6][thread=MainThread][step=19][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=19. I0423 16:08:59.931735 135065090590528 checkpoint_manager.py:2013] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 16:08:59.932419 135065090590528 metric_logger.py:185] completed step: 19, seconds: 0.158, TFLOP/s/device: 85.894, Tokens/s/device: 12946.866, total_weights: 65536, loss: 6.167 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Thu Apr 23 16:09:13 UTC 2026 EXIT_CODE=0