Linux为一组进程保留处理器(动态地) [英] Linux reserve a processor for a group of processes (dynamically)

问题描述

有没有一种方法可以将处理器排除在正常调度之外?

Is there a way to exclude a processor from normal scheduling?

也就是说，使用sched_setaffinity我可以指示线程应该在哪个处理器上运行，但是我正在寻找某种相反的说法.也就是说，我想从正常调度中排除给定的处理器，以便只有在那里明确调度的进程才能在其中运行.

That is, using sched_setaffinity I can indicate which processor a thread should run on, but I'm looking for kind of the inverse. That is, I want exclude a given processor from the normal scheduling, such that only processes which have been explicitly scheduled there can run there.

我还知道，在引导过程中，我可以限制init进程使用的处理器，因此可以限制所有继承的进程.但是，我希望有比这更动态的解决方案-在启动后我可以更改某些内容.

I also know that during boot I can limit the processors used by the init process, thus all inherited process. I was however hoping there would be a more dynamic solution than this -- something I can change post-boot.

请注意，我希望调度线程，而不仅仅是高级进程(这在某些情况下可能会有所作为).

推荐答案

cgroups，或者具体地说，cgroups基础结构的cpuset部分是在Linux中实现此目的的方法.请参见 http://www.kernel.org/doc中的1.4节专有cpusets" /Documentation/cgroups/cpusets.txt .

cgroups, or specifically, the cpuset part of the cgroups infrastructure is the way to do it in Linux. See section 1.4 "exclusive cpusets" in http://www.kernel.org/doc/Documentation/cgroups/cpusets.txt .

然后，如果如您在评论中所述，如果系统未启用cpuset，则表示您不走运.

Then again, if, as you say in a comment, your system does not have cpusets enabled, you're out of luck.

此外，您所要求的也许有点不合常规.也许，如果您要解释自己实际要实现的目标，就能为您提供替代解决方案.

Also, what you're asking for is perhaps slightly un-orthodox; perhaps if you were to explain what you're actually trying to achieve people would be able to point you to alternative solutions.

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