为Linux内核设置cpu亲和力，而不是进程 [英] setting cpu affinity for linux kernel, not process

问题描述

我很难找到有关如何设置linux内核(及其所有已加载模块)的cpu亲和力的信息，而不是特定过程的信息.

I am having a hard time finding information about how to set cpu affinity for linux kernel (with all of its loaded modules), NOT for a specific process.

这是因为我希望内核一直在CPU 0上运行以处理I/O内容，并且不希望任何开关在其他3个CPU上运行，因为它可能会污染L1和L2缓存.

This is because I want the kernel to run on CPU 0 all the time to handle I/O stuff, and not do any switches to run on other 3 CPUs because it may pollute L1 and L2 caches.

谢谢.

Nulik

推荐答案

代表进程的内核工作将始终在发出请求的CPU上进行.不过，您可以引导中断.查看/proc/interrupts以确定要移动的中断(例如与eth0匹配的所有内容)，并通过将十六进制掩码回显到/proc/irq/XXX/smp_affinity来设置亲和力.

Kernel work on behalf of processes will always happen on the CPU that makes the request. You can steer interrupts, though. Look at /proc/interrupts to identify the interrupts you want to move (say everything matching eth0) and set the affinity by echoing a hexadecimal mask to /proc/irq/XXX/smp_affinity.

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