请问rtthread多核移植时一个核就得对应一个定时器吗？

个人理解：多核都有独立的定时器中断和tick计数，用于判断在当前核上的线程时间片是否用完。但是系统TICK是唯一的，既系统暴露给延时函数等的TICK值是唯一的，即核0上的tick计数值。可以从rt_tick_increase和rt_tick的定义理解一下。

/* src/clock.c */

/**

* This function will notify kernel there is one tick passed. Normally,

* this function is invoked by clock ISR.

*/

void rt_tick_increase(void)

{

    struct rt_thread *thread;

    /* increase the global tick */

#ifdef RT_USING_SMP

    rt_cpu_self()->tick ++;

#else

    ++ rt_tick;

#endif

    /* check time slice */

    thread = rt_thread_self();

    -- thread->remaining_tick;

    if (thread->remaining_tick == 0)

    {

        /* change to initialized tick */

        thread->remaining_tick = thread->init_tick;

        thread->stat |= RT_THREAD_STAT_YIELD;

        /* yield */

        rt_thread_yield();

    }

    /* check timer */

    rt_timer_check();

}

/* src/clock.c */

#ifdef RT_USING_SMP

#define rt_tick rt_cpu_index(0)->tick

#else

static rt_tick_t rt_tick = 0;

#endif