關於/proc/stat與CPU使用率的計算

http://new-acos.blogspot.com/2010/02/linuxprocstatcpu.html

http://colby.id.au/node/39

http://hi.baidu.com/%B5%DA%C6%DF%B9%FA%B6%C8/blog/item/8849e14b6a82e4f682025cc6.html

http://www.linuxhowtos.org/System/procstat.htm
http://blog.csdn.net/pppjob/article/details/4060336