在多道程序或多任务系统中，系统同时处于就绪态的进程有若干个。为了使系统中的各进程能有条不紊地进行，必须选择某种调度策略，以选择一进程占用处理机。时间片轮转算法-Procedures in the multi-channel or multi-task system, the system in a ready state at the same time there are a number of processes. In order to make the process system ca