根据服务对象不同,常用的单处理机 OS 可以分为如下三种类型: 允许多个用户在其终端上同时交互地使用计算机的 OS 称为 系统,它通常采用 策略为用户服务; 允许用户把苦干个作业提交计算机系统集中处理的 OS 称为 系统,衡量这种系统性能的一个主要指标是系统的 ; 在 系统控制下,计算机系统能及时处理由过程控制反馈的数据并做出响应。设计这种系统首先考虑系统的 。
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