处理机调度算法的设计需要考虑系统的设计目标，而且通常算法设计不能复杂，否则会带来过大的系统开销，因为处理机切换发生非常频繁。也正因为此，通常将调度与上下文切换过程以汇编语言书写-processor scheduling algorithm design need to consider the design goals, but usually not complex algorithm design. it will bring too much system overhead, as processor switch occurred very frequently. It is also why, in general context switching and scheduling process to write assembly language