-操作系统精髓与设计原理(第五版)+课后题答案1(11)

-操作系统精髓与设计原理(第五版)+课后题答案1

CHAPTER 9 UNIPROCESSOR SCHEDULING

Review Questions

9.1 Long-term scheduling: The decision to add to the pool of processes to be

executed. Medium-term scheduling: The decision to add to the number of processes that are partially or fully in main memory. Short-term

scheduling: The decision as to which available process will be executed by the processor

9.3 Turnaround time is the total time that a request spends in the system

(waiting time plus service time. Response time is the elapsed time

between the submission of a request until the response begins to appear as output.

Problems

9.1 Each square represents one time unit; the number in the square refers to

the currently-running process.

FCFS

RR, q = 1 RR, q = 4 SPN SRT HRRN Feedback, q = 1 Feedback, q = 2i

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