An important processing procedure in which top-priority processing most often results from real-time entries which usually have precedence, through the use of interrupts into lower-priority or background processing.

• 一种重要的处理过程，其中最高优先权处理任务常常由具有优先度的实时任务形成，经过使用中断而进入较低优先权任务或后台处理任务。