Python监控进程性能数据并绘图保存为PDF文档

引言

利用psutil模块（https://pypi.python.org/pypi/psutil/），能够非常方便的监控系统的CPU、内存、磁盘IO、网络带宽等性能参数，以下是否代码为监控某个特定程序的CPU资源消耗，打印监控数据，最终绘图显示，并且保存为指定的 PDF 文档备份。

示范代码

#!/usr/bin/env python
# -*- coding: utf-8 -*-
'''
Copyright (C)  2015 By Thomas Hu.  All rights reserved.

@author : Thomas Hu (thomashtq#163测试数据)
@version: 1.0
@created: 2015-7-14
'''
import matplotlib.pyplot as plt
import psutil as ps
import os
import time
import random
import collections
import argparse

class ProcessMonitor(object):
    def __init__(self, key_name, fields, duration, interval):
        self.key_name = key_name
        self.fields = fields
        self.duration = float(duration)
        self.inveral = float(interval)

        self.CPU_COUNT = ps.cpu_count()
        self.MEM_TOTAL = ps.virtual_memory().total / (1024 * 1024)
        self.procinfo_dict = collections.defaultdict(dict)


    def _get_proc_info(self, pid):
        try:
            proc = ps.Process(pid)
            name = proc.name()
            # If not contains the key word, return None
            if name.find(self.key_name) == -1:
                return None
            pinfo = {
                    "name": name,
                    "pid" : pid,
                    }
            # If the field is correct, add it to the process information dictionary.
            for field in self.fields:
                if hasattr(proc, field):
                    if field == "cpu_percent":
                        pinfo[field] = getattr(proc, field)(interval = 0.1) / self.CPU_COUNT
                    elif field == "memory_percent":
                        pinfo[field] = getattr(proc, field)() * self.MEM_TOTAL / 100
                    else:
                        pinfo[field] = getattr(proc, field)()
            if pid not in self.procinfo_dict:
                self.procinfo_dict[pid] = collections.defaultdict(list)
                self.procinfo_dict[pid]["name"] = name
            for field in self.fields:
                self.procinfo_dict[pid][field].append(pinfo.get(field, 0))
            print(pinfo)
            return pinfo
        except:
            pass
        return None

    def monitor_processes(self):
        start = time.time()
        while time.time() - start  

输出结果示范图

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