如何从C程序刷新Linux中的CPU缓存? [英] How to flush the CPU cache in Linux from a C program?

问题描述

我正在编写一个C程序，需要在其中刷新内存.我想知道是否有任何UNIX系统命令来刷新CPU缓存.

I am writing a C program in which I need to flush my memory. I would like know if there is any UNIX system command to flush the CPU cache.

这是我的项目的要求，其中涉及计算逻辑所需的时间.

This is a requirement for my project which involves calculating the time taken for my logic.

我已经阅读过有关cacheflush(char *s, int a, int b)函数的信息，但是我不确定它是否合适以及在参数中传递什么.

I have read about the cacheflush(char *s, int a, int b) function but I am not sure as to whether it will be suitable and what to pass in the parameters.

推荐答案

1. 我认为您的意思是"CPU缓存"，而不是内存缓存

1. I take it you mean "CPU cache", not memory cache

上面的链接很好:通过CPU写入大量数据"的建议不是 Windows特定的

The link above is good: the suggestion "write a lot of data via CPU" is not Windows specific

这是同一主题的另一种变化:

Here's another variation on the same theme:

• 如何清除CPU L1和L2缓存

这是有关Linux和CPU缓存的文章:

Here's an article about Linux and CPU cache:

• http://lwn.net/Articles/252125/

注意:

在此级别(非常低)，"Linux"！="Unix"

At this (very, very low) level, "Linux" != "Unix"

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