我可以以编程方式选择线程应在多核CPU的哪个核上运行吗? [英] Can I programmatically pick and choose which core of a multi-core CPU my thread should run on?

问题描述

还是由操作系统控制?我听说Google推出了新的Go语言，它具有供程序员使用的内置功能，还是我理解错了?

Or is it controlled by the operating system? I hear the new Go language from Google has built-in features for a programmer to go that granular, or have I understood it wrong?

推荐答案

对于linux操作系统， sched_setaffinity 是您的答案.从Linux内核2.5.8开始受支持.

For linux os, sched_setaffinity is your answer. It's supported since linux kernel 2.5.8.

名称

sched_setaffinity，sched_getaffinity —设置并获取进程的CPU亲和力掩码

sched_setaffinity, sched_getaffinity — set and get a process's CPU affinity mask

#define _GNU_SOURCE
#include <sched.h>

int sched_setaffinity(  pid_t pid,
    size_t cpusetsize,
    cpu_set_t *mask);

int sched_getaffinity(  pid_t pid,
    size_t cpusetsize,
    cpu_set_t *mask);

亲和力遮罩实际上是一个 每个线程的属性可以是 为每个独立调整 线程组中的多个线程.价值 从对gettid(2)的调用返回的值可以 在参数pid中传递. 将pid指定为0将设置 调用线程的属性，以及 传递调用返回的值 getpid(2)将设置属性 用于线程的主线程 团体. (如果您使用的是POSIX 线程API，然后使用 pthread_setaffinity_np(3)代替 sched_setaffinity().)

The affinity mask is actually a per-thread attribute that can be adjusted independently for each of the threads in a thread group. The value returned from a call to gettid(2) can be passed in the argument pid. Specifying pid as 0 will set the attribute for the calling thread, and passing the value returned from a call to getpid(2) will set the attribute for the main thread of the thread group. (If you are using the POSIX threads API, then use pthread_setaffinity_np(3) instead of sched_setaffinity().)

这篇关于我可以以编程方式选择线程应在多核CPU的哪个核上运行吗?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！