python实现监控linux性能及进程消耗性能的方法

本文以实例形式实现了python监控linux性能以及进程消耗性能的方法，具体实现代码如下：

# -*- coding: utf-8 -*-
"""
created on tue jun 10 10:20:13 2014

@author: lifeix
"""

from collections import ordereddict
import time
import os

def cpuinfo():
  lines = open('/proc/stat').readlines()
  for line in lines:
    ln = line.split()
    if ln[0].startswith('cpu'):
      return ln;
  return []
w = cpuinfo()
one_cputotal=long(w[1])+long(w[2])+long(w[3])+long(w[4])+long(w[5])+long(w[6])+long(w[7])
one_cpuused=long(w[1])+long(w[2])+long(w[3])

def cpuinfo():
  ''' return the information in /proc/cpuinfo
  as a dictionary in the following format:
  cpu_info['proc0']={...}
  cpu_info['proc1']={...}
  '''
  cpuinfo=ordereddict()
  procinfo=ordereddict()

  nprocs = 0
  f = open('/proc/cpuinfo')
  for line in f.readlines():
    if not line.strip():
      # end of one processor
      cpuinfo['proc%s' % nprocs] = procinfo
      nprocs=nprocs+1
      # reset
      procinfo=ordereddict()
    else:
      if len(line.split(':')) == 2:
        procinfo[line.split(':')[0].strip()] = line.split(':')[1].strip()
      else:
        procinfo[line.split(':')[0].strip()] = ''
  return cpuinfo

def meminfo():
  ''' return the information in /proc/meminfo
  as a dictionary '''
  meminfo=ordereddict()

  f = open('/proc/meminfo')
  for line in f.readlines():
    meminfo[line.split(':')[0]] = line.split(':')[1].strip()
  return meminfo

f = open("sysinfo.log",'a')
def logsysinfo(cpu,mem,line):
  f.write('\ncpu:%s -------mem: %s------mongocpu:%s'%(cpu,mem,line))
  f.flush();

def process_info():
  #获取drm_processes 的进程号
  textlist = os.popen('top -bcn 1 -p 12023').readlines()
  line = ''
  for t in textlist:
    if t.find('12023'):
      line = t
  line = line.split(' ')
  #此处的值按照自己的需求去取
  return line[15]
if __name__=='__main__':
  cpuinfo = cpuinfo()
  for processor in cpuinfo.keys():
    print(cpuinfo[processor]['model name'])
    f.write("cpu:%s"%cpuinfo[processor]['model name'])
  #meminfo = meminfo()
  #print('total memory: {0}'.format(meminfo['memtotal'])) 

  try:
    while true:
      line = process_info()
      time.sleep(2)
      mi = meminfo()
      print('free memory: {0}'.format(mi['memfree']))
      w = cpuinfo()
      two_cputotal=long(w[1])+long(w[2])+long(w[3])+long(w[4])+long(w[5])+long(w[6])+long(w[7])
      two_cpuused=long(w[1])+long(w[2])+long(w[3])
      cpuused=float(two_cpuused-one_cpuused)/(two_cputotal-one_cputotal)
      print ('%.2f%%'%(cpuused*100))
      print line
      cpu = '%.2f%%'%(cpuused*100)
      logsysinfo(cpu,format(mi['memfree']),line)
  except keyboardinterrupt, e:
    print ("\ncpumonit exited")
    f.close()
f.close()