diff --git a/cold_start_app.sh b/cold_start_app.sh
index 4a2b3ff..b7ebbf5 100755
--- a/cold_start_app.sh
+++ b/cold_start_app.sh
@@ -11,8 +11,6 @@ adb shell "perfetto -c /data/misc/perfetto-configs/perfconf.txt --txt -o /data/m
 perfetto_pid=$!
 echo perfetto_pid is $perfetto_pid
 
-ps -ef | grep $perfetto_pid
-
 # 启动应用
 sleep 1
 activity=$(adb shell dumpsys package $app | grep -A 1 -w "android.intent.action.MAIN:" | head -n 2 | tail -n 1 | awk '{print $2}')
@@ -23,7 +21,9 @@ echo "starting $app"
 adb shell am start -n $activity
 
 # 睡眠15s等待perfetto退出
-sleep 15
+sleep 12
+
+wait
 
 # 后面的dumpsys meminfo也会分配大页
 # 所以先看分配大页数