我編寫了這段代碼來將2個內核線程綁定到不同的CPU：

#include

#include

#include

#include

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 ret;

}

static int kernel_init(void)

{

printk(KERN_INFO "module_init\n");

cpu = get_cpu();

put_cpu();

printk("main thread cpu = %d \n",cpu);

task1 = kthread_create(&thread_function_one,(void *)&data,"one");

kthread_bind(task1, cpu);

wake_up_process(task1);

cpu = 5;

task2 = kthread_create(&thread_function_two,(void *)&data,"two");

kthread_bind(task2, cpu);

wake_up_process(task2);

return 0;

}

static void kernel_exit(void)

{

kthread_stop(task1);

kthread_stop(task2);

printk(KERN_INFO "module_exit\n");

}

module_init(kernel_init);

module_exit(kernel_exit);

MODULE_AUTHOR("K_K");

MODULE_LICENSE("GPL");

但是當我在thread_function_one和thread_function_two中打印cpu id時,兩者都打印與主線程相同的CPU.

我做錯了嗎？

這個編程的輸出：

kernel: [ 956.816510] module_init

kernel: [ 956.816515] main thread cpu = 8

kernel: [ 956.816743] IN THREAD FUNCTION 1

kernel: [ 956.816748] t1 cpu = 8

kernel: [ 956.817057] IN THREAD FUNCTION 2

kernel: [ 956.817062] t2 cpu = 8

kernel: [ 961.815160] t1 cpu = 8

kernel: [ 962.814649] t2 cpu = 8

kernel: [ 966.816760] t1 cpu = 8

kernel: [ 968.815711] t2 cpu = 8

kernel: [ 971.818307] EXIT from thread function 1

kernel: [ 974.816813] EXIT from thread function 2

kernel: [ 974.816872] module_exit

總結

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