What is the difference between preemptive scheduling and time slicing? 抢先调度与分时调度有何不同？
Under preemptive scheduling, the highest priority task executes until it enters the waiting or dead states or a higher priority task comes into existence. 采用抢先调度方式时，具有最高优先级的任务先执行直到它进入等待或僵死状态，或者是有更高优先级的任务产生。
