利用linux线程亲和性绑定，使所有的core（指逻辑核而不是物理核）满负荷运行

linux_affinity.c

#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/syscall.h>
#include <sched.h>
#include <pthread.h>

void test_proc(void *arg)
{
    pid_t cur_tid = syscall(SYS_gettid);
    cpu_set_t mask;
    int cpu_seq = *(int *)arg;
    int num = 0;
    
    CPU_ZERO(&mask);
    CPU_SET(cpu_seq, &mask);
    
    if( sched_setaffinity(cur_tid, sizeof(mask), &mask ) == -1 )
    {
      printf("Could not set CPU Affinity CpuCore[%d]\n", cpu_seq);
    }
    
    while(1)num++;
}

int main()
{
    int i;
    int cpu_cores;
    pthread_t tid;
    
    cpu_cores = sysconf(_SC_NPROCESSORS_ONLN);
    printf("cpu cores = %d\n", cpu_cores);
    
    for (i = 0; i < cpu_cores; i++)
    {
        if (0 != pthread_create(&tid, NULL, (void*)test_proc, &i))
        {
            printf("pthread_create %d error\n", i);
        }
        sleep(1);
    }
    
    while(1)sleep(1);
}