fio（一）

http://blog.csdn.net/youngstonep/article/details/52315192#t1

http://www.jianshu.com/p/c406a967a4ad

http://jicki.blog.51cto.com/1323993/1330025

http://chuansong.me/n/2186976

http://lilinji.blog.51cto.com/5441000/1569623