如何比较几个GPROF探查报告？ [英] How to compare several Gprof profiler reports?

问题描述

在使用不同的参数值，我的C程序的多个运行，我得到多个分析报告文件。这是太难看了，并进行比较。

In multiple run of my C program with different parameter values, I get multiple profiling report files. This is too difficult to read and compare.

有没有一种方法，我可以得到一个比较文件，preferably用图表显示，性能如何增加或减少的大小增加（即我在运行时传递参数）。

Is there a way I can get a comparison file, preferably with graphs to show , how the performance increased or decreased as the size (the parameter that i am passing at the run time ) is increased.

推荐答案

尝试PERF（1）工具。

Try perf(1) tool.

perf record ./yourbinary
perf record ./yourbinary-v2
perf diff

有编译器选项-O0 -g -ggdb着使二进制文件的时候是会经常试图理解为什么这个VS该版本具有性能上的差异时提供帮助。

Having compiler options "-O0 -g -ggdb" around when making binaries is will often help when trying to understand why this vs that version have performance difference.

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