python实现监控linux性能及进程消耗性能的方法

# -*- coding: utf-8 -*-"""Created on Tue Jun 10 10:20:13 2014@author: lifeix"""from collections import OrderedDictimport timeimport osdef 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 CPUinfodef 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 meminfof = 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()