rtt消息队列delay问题

while (1)
{
    rt memset(&buf[0], 0, sizeof(buf));
    /* 从消息队列中接收消息 */
    if (rt mq recv(&mq, &buf[0], sizeof(buf), RT WAITING FOREVER) == RT EOK)
    {
        rt kprintf("thread1: recv msg from message queue, the content:%s

    /* 延迟10个OS Tick */
    rt thread delay(10);
}