操作系统拟操作系统进程调度过程，包含先来先服务，时间片轮转，多级反馈等调度策略。-Simulation of the operating system process scheduling process, including the first come first serve, time slice rotation, multi-level feedback scheduling strategy.-OS operating system process scheduling process intended to contain a first-come, first served, time slice rotation, multi-level feedback scheduling strategy.-Simulation Of the operating system process scheduling process, including the first come first serve, time slice rotation, multi-level feedback scheduling strategy.