---
id: pr-sglang-5050
repo: sgl-project/sglang
pr: 5050
title: FA3 Spec Decoding to support top k = 1 and add cuda graph support
author: hebiao064
date: '2025-04-05'
url: https://github.com/sgl-project/sglang/pull/5050
source_category: upstream-code
architectures:
- sm100
tags: []
techniques: []
hardware_features: []
kernel_types: []
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: ca8d02abd520194bc0d182d62aeb39d9496ca91d
inclusion_reason: defer
changed_paths:
- python/sglang/srt/layers/attention/flashattention_backend.py
- python/sglang/srt/model_executor/forward_batch_info.py
artifact_dir: evidence/pull-bundles/sglang/gh-5050
head_ref_oid: bf67a4bea32a3129f29734369bc16f2b967beab4
---
# FA3 Spec Decoding to support top k = 1 and add cuda graph support

- Repository: `sgl-project/sglang`
- PR: [5050](https://github.com/sgl-project/sglang/pull/5050)
- Decision: `defer`
- Reason: defer

## Changed Paths

- `python/sglang/srt/layers/attention/flashattention_backend.py`
- `python/sglang/srt/model_executor/forward_batch_info.py`

## Evidence Bundle

`evidence/pull-bundles/sglang/gh-5050`
