python监控linux性能以及进程消耗的性能

# -*- 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("
cpu:%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 ("
cpumonit exited")
        f.close()
f.close()