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()