python计算cpu利用率 iowait百分比

计算方式参考文档：http://www.jianshu.com/p/0ec1ea49f4a3

 
 
! /usr/bin/env python
 
 
coding:utf8
 
 
import commands
 import time
 def get_cpu_value():
 current_cpu_value={}
 cpu_info_stat=commands.getoutput("cat /proc/stat")
 cpu_info=cpu_info_stat.split('\n')[0].split()
 cpu_info.pop(0)
 current_cpu_value["cpu_idle"]=float(cpu_info[3])
 current_cpu_value["iowait"]=float(cpu_info[4])
 current_cpu_value["cpu_all"]=sum([float(i) for i in cpu_info])
 return current_cpu_value
 
 
def cpuinfo():
 last_cpu_value=get_cpu_value()
 time.sleep(60)
 current_cpu_value=get_cpu_value()
 idle_percent=(current_cpu_value["cpu_idle"]-last_cpu_value["cpu_idle"])/(current_cpu_value["cpu_all"]-last_cpu_value["cpu_all"])
 io_percent=(current_cpu_value["iowait"]-last_cpu_value["iowait"])/(current_cpu_value["cpu_all"]-last_cpu_value["cpu_all"])
 last_cpu_value=current_cpu_value
 return '%0.2f' % (1-idle_percent),'%0.2f' % (io_percent)
 
 
print cpuinfo()