调度的实质是操作系统按照某种特定的分配策略来分配资源。进程调度的目的是分配CPU 资源。由于进程调度程序执行的频率很高，因此调度算法的好坏将直接影响到操作系统的性能。本实验的目的是编程模拟实现几种常见的进程调度算法，通过对几组进程分别使用不同的调度算法，计算进程的平均周转时间和平均带权周转时间，比较各种算法的性能优劣。-Scheduling is the essence of a particular operating system in accordance with the allocation strategy to allocate resources. The purpose of the process of scheduling is to allocate CPU resources. Since the implementation of the process of a high frequency of the scheduler, the scheduling algorithm will directly affect the operating system performance. The aim of this simulation is to achieve some common programming process scheduling algorithm, the process by several groups using different scheduling algorithms, respectively calculate the average turnaround time for the process and the average turnaround time with the right to compare the performance of the merits of various algorithms.