/* Suspends execution for approximately TICKS timer ticks. */voidtimer_sleep (int64_t ticks) { //ticks는 sleep 상태에 돌입해야 할 시간을 의미한다. int64_t start = timer_ticks (); //현재 타이머의 ticks을 가져오고 start에 대입한다. ASSERT (intr_get_level () == INTR_ON); while (timer_elapsed (start) /* Yields the CPU. The current thread is not put to sleep and may be scheduled again immediately at the scheduler's whim. */void..