小编K_K*_*K_K的帖子

我编写了这段代码来将2个内核线程绑定到不同的CPU:

#include<linux/kthread.h>
#include<linux/sched.h>
#include<linux/delay.h>
#include<linux/slab.h>

struct task_struct *task1;
struct task_struct *task2;
int cpu, data;

int thread_function_one(void *data)
{
    int ret = 10;
    printk(KERN_INFO "IN THREAD FUNCTION 1 \n");

    while(!kthread_should_stop()){
       cpu = get_cpu();
       put_cpu();
       printk("t1 cpu = %d\n",cpu);
       msleep(5000);
    }
    printk(KERN_INFO "EXIT from thread function 1\n");
    return ret;
}

int thread_function_two(void *data)
{
    int ret = 10;
    printk(KERN_INFO "IN THREAD FUNCTION 2 \n");

    while(!kthread_should_stop()){
        cpu = get_cpu();
        put_cpu();
        printk("t2 cpu = %d\n",cpu);
        msleep(6000);
    }
    printk(KERN_INFO "EXIT from thread function 2\n");
    return …

为什么在Linux中很多结构使用____cacheline_aligned_in_smp宏？在访问结构时是否有助于提高性能.如果是,那怎么样？