python 监控 linux cpu 使用率，pythonlinux,[Python]代码

python 监控 linux cpu 使用率，pythonlinux,[Python]代码

[Python]代码

    def _read_cpu_usage(self):          """Read the current system cpu usage from /proc/stat."""          try:              fd = open("/proc/stat", 'r')              lines = fd.readlines()          finally:              if fd:                  fd.close()          for line in lines:              l = line.split()              if len(l) < 5:                  continue              if l[0].startswith('cpu'):                  return l          return []      def get_cpu_usage(self):          """         get cpu avg used by percent         """          cpustr=self._read_cpu_usage()          if not cpustr:              return 0          #cpu usage=[(user_2 +sys_2+nice_2) - (user_1 + sys_1+nice_1)]/(total_2 - total_1)*100          usni1=long(cpustr[1])+long(cpustr[2])+long(cpustr[3])+long(cpustr[5])+long(cpustr[6])+long(cpustr[7])+long(cpustr[4])          usn1=long(cpustr[1])+long(cpustr[2])+long(cpustr[3])          #usni1=long(cpustr[1])+long(cpustr[2])+long(cpustr[3])+long(cpustr[4])          # self.sleep=2          time.sleep(self.sleep)          cpustr=self._read_cpu_usage()          if not cpustr:              return 0          usni2=long(cpustr[1])+long(cpustr[2])+float(cpustr[3])+long(cpustr[5])+long(cpustr[6])+long(cpustr[7])+long(cpustr[4])          usn2=long(cpustr[1])+long(cpustr[2])+long(cpustr[3])          cpuper=(usn2-usn1)/(usni2-usni1)          return 100*cpupe