微信端网站开发模板,网站关键词过多,wordpress 删除数据库,冯耀宗seo视频教程一，工具简介 vfsreadlat.py工具用于跟踪VFS读取延迟分布情况，示例的运行结果是一个函数延迟分布直方图。 二，代码示例 #!/usr/bin/python# USAGE: vfsreadlat.py [interval [count]] # # The default interval is 5 seconds. A Ctrl-C will print the partially # gathere…一，工具简介 vfsreadlat.py工具用于跟踪VFS读取延迟分布情况，示例的运行结果是一个函数延迟分布直方图。 二，代码示例 #!/usr/bin/python# USAGE: vfsreadlat.py [interval [count]] # # The default interval is 5 seconds. A Ctrl-C will print the partially # gathered histogram then exit. # # Copyright (c) 2015 Brendan Gregg. # Licensed under the Apache License, Version 2.0 (the "License") # # 15-Aug-2015 Brendan Gregg Created this.from __future__ import print_function from bcc import BPF from time import sleep from sys import argvdef usage():print("USAGE: %s [interval [count]]" % argv[0])exit()# 参数 interval = 5 count = -1 if len(argv) 1:try:interval = int(argv[1])if interval == 0:raiseif len(argv) 2:count = int(argv[2])except: # also catches -h, --helpusage()# 加载BPF程序 b = BPF(src_file = "vfsreadlat.c") b.attach_kprobe(event="vfs_read