diff --git a/study/debug/tools/perf/flame_graph/README.md b/study/debug/tools/perf/flame_graph/README.md
index b319ba9..f7d0395 100644
--- a/study/debug/tools/perf/flame_graph/README.md
+++ b/study/debug/tools/perf/flame_graph/README.md
@@ -143,8 +143,6 @@ sudo perf report -n --stdio
 -------
 
 
-```
-
 首先用 `perf script` 工具对 `perf.data` 进行解析