1. perf perf 是一个调查 Linux 中各种性能问题的有力工具. NAME perf - Performance analysis tools for Linux SYNOPSIS perf [--version] [--help] COMMAND [ARGS] DESCRIPTION Performance counters for Linux are a new kernel-based subsystem that provide a framework for all thi…
转自:http://ariasprado.name/2011/11/30/profiling-application-llc-cache-misses-under-linux-using-perf-events.html In this post we will see how to do some profiling under Ubuntu Linux using Perf Events, present in the kernel since version 2.6.31 [1, 2].…
Perf是Linux kernel自带的系统性能优化工具.Perf的优势在于与Linux Kernel的紧密结合,它可以最先应用到加入Kernel的new feature.pef可以用于查看热点函数,查看cashe miss的比率,从而帮助开发者来优化程序性能. 1.perf的安装 由于我们经常是在自己编译的内核上进行开发工作,这里需要有包含调式信息的内核启动镜像文件vmlinux,在自定义内核的基础之上,进入linux内核源码,linux/tools/perf make make instal…
从2.6.31内核开始,linux内核自带了一个性能分析工具perf,能够进行函数级与指令级的热点查找. perf Performance analysis tools for Linux. Performance counters for Linux are a new kernel-based subsystem that provide a framework for all things performance analysis. It covers hardware level (CP…