旧博文，搬到 csdn 原文：http://rebootcat.com/2018/05/20/analyze_cpu/

python脚本采集cpu

经常要做一些 linux 系统上的性能分析或者采集 cpu/mem/bandwidth 上报到监控系统。

分享一个我平常常用到的 cpu 采集脚本，原理是分析 /proc/stat 文件， 脚本如下：

#!/usr/bin/env python # -*- coding:utf8 -*- import time import copy class CpuWatch(object): def __init__(self, time_step): self.cpufile_ = '/proc/stat' self.watch_time_step_ = time_step # 60 s return # 采集cpu信息 def read_cpu(self): cpu_info = {} cpufile = self.cpufile_ with open(cpufile, 'r') as fin: for line in fin: line_fields = line.split() if line_fields[0] != "cpu": continue total = 0 for field in line_fields: if field == "cpu": continue total += int(field) cpu_info = { "User": int(line_fields[1]), "Sys": int(line_fields[3]), "Idle": int(line_fields[4]), "Steal": int(line_fields[8]), "Wait": int(line_fields[5]), "Total": total } fin.close() return cpu_info def get_avg_cpu(self, cpu_info_old, cpu_info): if not cpu_info_old or not cpu_info: return None result = {} if set(cpu_info.keys()) != set(cpu_info_old.keys()): return None delta_total = cpu_info["Total"] - cpu_info_old["Total"] delta_user = cpu_info["User"] - cpu_info_old["User"] delta_sys = cpu_info["Sys"] - cpu_info_old["Sys"] delta_idle = cpu_info["Idle"] - cpu_info_old["Idle"] delta_wait = cpu_info["Wait"] - cpu_info_old["Wait"] delta_steal = cpu_info["Steal"] - cpu_info_old["Steal"] last_cpu_info = cpu_info result = { "cpu_user": int(float(delta_user)/float(delta_total) * 100), "cpu_sys": int(float(delta_sys)/float(delta_total) * 100), "cpu_wait": int(float(delta_wait)/float(delta_total) * 100), "cpu_steal": int(float(delta_steal)/float(delta_total) * 100), "cpu_idle": int(float(delta_idle)/float(delta_total) * 100), "cpu_util": int(float(delta_total - delta_idle - delta_wait - delta_steal)/float(delta_total) * 100) } print(result) return result def run(self): cpu_info_old = {} while True: if not cpu_info_old: cpu_info_old = self.read_cpu() time.sleep(self.watch_time_step_) cpu_info = self.read_cpu() result = self.get_avg_cpu(cpu_info_old, cpu_info) cpu_info_old = copy.deepcopy(cpu_info) if __name__ == '__main__': cpu_watcher = CpuWatch(time_step = 5) cpu_watcher.run()

脚本可以直接在 我的github 进行下载。

其他

欢迎关注下我的其他脚本，平常可能会用到的一些脚本，整理了一下。

https://github.com/smaugx/dailytools

Blog:

rebootcat.com

email: linuxcode2niki@gmail.com

2018-05-20 于杭州 By 史矛革