diff --git a/study/debug/trace/trace-events-sample/README.md b/study/debug/trace/trace-events-sample/README.md
index 9ee161a..5842b4b 100644
--- a/study/debug/trace/trace-events-sample/README.md
+++ b/study/debug/trace/trace-events-sample/README.md
@@ -1,12 +1,16 @@
-#驱动安装
--------
 http://blog.csdn.net/arethe/article/details/6293505]
 http://lxr.free-electrons.com/source/Documentation/trace/tracepoints.txt
+https://lwn.net/Articles/410200/
+
+
+#1  驱动安装
+-------
+
 
 sudo insmod trace-events-sample.ko
 
 
-#检查驱动
+#2  检查驱动
 -------
 
 cat /sys/kernel/debug/tracing/available_events | grep sample-trace
@@ -15,7 +19,7 @@ cd /sys/kernel/debug/tracing/events/sample-trace
 
 
 
-#trace-cmd
+#3  trace-cmd
 -------
 
 sudo trace-cmd reset