From 42464cbe1f364122d3019f20bd5486eb704581de Mon Sep 17 00:00:00 2001
From: winlin <winlin@vip.126.com>
Date: Sun, 27 Jul 2014 17:59:19 +0800
Subject: [PATCH] add disk io test command

---
 trunk/src/app/srs_app_utility.hpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/trunk/src/app/srs_app_utility.hpp b/trunk/src/app/srs_app_utility.hpp
index a8d6b6af9..63a4c60f5 100644
--- a/trunk/src/app/srs_app_utility.hpp
+++ b/trunk/src/app/srs_app_utility.hpp
@@ -325,6 +325,10 @@ extern void srs_update_proc_stat();
 // @see: http://stackoverflow.com/questions/4458183/how-the-util-of-iostat-is-computed
 // for total disk io, @see: cat /proc/vmstat |grep pgpg
 // for device disk io, @see: cat /proc/diskstats
+// @remark, user can use command to test the disk io:
+//      time dd if=/dev/zero bs=1M count=2048 of=file_2G
+// @remark, the iotop is right, the iostat and dstat result seems not ok.
+//      where the dd command will give the write MBps, it's absolutely right.
 class SrsDiskStat
 {
 public: