如何测量当前在Linux上使用的内存带宽？ [英] How to measure memory bandwidth currently being used on Linux?

问题描述

我在写一个小型Linux应用程序，记录计算机的功耗以及CPU利用率和磁盘利用率。我想添加记录当前使用的内存带宽的能力，这样我就可以看到与功耗相关的程度。

I'm writing a small Linux application which logs the computer's power consumption along with CPU utilisation and disk utilisation. I'd like to add the ability to log memory bandwidth currently being used so I can see how well that correlates with a power consumption.

我知道我可以获得信息关于当前从 / proc / meminfo 分配的内存量，但当然不告诉我有多少带宽目前正在使用。有没有人知道我如何测量当前使用的内存带宽？

I understand that I can get information about the amount of memory currently allocated from /proc/meminfo but, of course, that doesn't tell me how much bandwidth is being used at present. Does anyone know how I could measure memory bandwidth currently in use?

编辑
我想这主要工作在x86和x86-64平台

edit I'd like this to work primarily on the x86 and x86-64 platforms

推荐答案

这是高度CPU依赖，但你需要能够访问CPU性能寄存器。你可以通过oprofile来做到这一点。注意，并非所有的CPU都有一个性能寄存器（或寄存器组合），可用于计算内存带宽使用。

It's highly CPU-dependent but you'll need to be able to get access to the CPU's performance registers. You may be able to do this via oprofile. Note that not all CPUs have a performance register (or combination of registers) which can be used to calculate to memory bandwidth usage, however.

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