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Theoperatingsystemmustmakethreetypesofschedulingdecisionswithrespecttotheexecutionofp... The operating system must make three types of scheduling decisions with respect to the execution of processes.Long-term scheduling determines when new
processes are adtermine to the system.Medium-term scheduling is part of the swapping function and determines when a program is brought partially or
fully into main memory so that it may be executed .Short-term scheduling determines whhich ready process will be executed next by the processor This
section focuses on the issues relating to short -term scheduling.
A variety of criteria are used in designing the short-term scheduler.Some of these criteria relate to the behavior of the system as perceived by the
individual user(user oriented),whereas others view the total effectiveness of the system in meeting the needs of all users(system oriented).Some of
the criteria relate specifically to some quantitative measure of performance time is generally the most important characteristic of a system,whereas
fron a system point of view,throughput or processor utilization is important.
A variety of algorithms have been developed for making the short-term scheduling decision among all ready proccsses. These include the following.
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2010-11-29 · 超过19用户采纳过TA的回答
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操作系统的必需做三个类型预定的决定关于过程的施行。长期预定确定,当新
过程是adtermine对系统。中期预定是交换的作用的一部分并且确定节目什么时候部分地被带来或
fully到主存储器里,以便它能被执行。短期预定确定准备好过程将由加工者其次执行这的whhich
section集中于问题与短期预定相关。
各种各样的标准用于设计短期调度程序。其中一些标准与系统的行为关连如察觉由
individual用户(用户针对),而其他观看系统的总有效率在适应所有用户的需要的(面向系统)。一些
the标准与表现时间某一定量措施关连明确地通常是系统的最重要的特征,而
fron系统观点、生产量或者处理器运用是重要的。
各种各样的算法为做出在所有准备好proccsses之中的短期预定的决定被开发了。 这些包括以下。
owengeng
2010-11-28
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悬赏分数太少,不想翻译,建议找谷歌去
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