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Exam 5: Cpu Scheduling

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Question 31

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Which of the following items does not belong to the function of a dispatcher?

A) switching context from one process to another
B) selecting a process among the available ones in the ready queue
C) switching to user mode
D) jumping to the proper location in the user program to resume that program

E) B) and C)
F) A) and B)

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Question 32

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Load balancing is typically only necessary on systems with a common run queue.

A) True
B) False

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Question 33

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If the time quantum get too large, RR scheduling degenerates to __________?

In the Linux CFS scheduler, the task with smallest value of vruntime is considered to have the highest priority.

Which of the following circumstances can preemptive scheduling take place?

Which of the following POSIX API sets the scheduling policy?

A Solaris interactive thread with priority 15 has a higher relative priority than an interactive thread with priority 20

Which of the following can be a solution to the problem of indefinite blockage of low-priority processes?

Describe two general approaches to load balancing.

What role does the dispatcher play in CPU scheduling?

Explain the fundamental difference between asymmetric and symmetric multiprocessing.

The Linux CFS scheduler identifies _____________ as the interval of time during which every runnable task should run at least once.

In RR scheduling, the time quantum should be small with respect to the context-switch time.

What effect does the size of the time quantum have on the performance of an RR algorithm?

What is the numeric priority of a Windows thread in the NORMAL_PRIORITY_CLASS with HIGHEST relative priority?

Distinguish between coarse-grained and fine-grained multithreading.

A Solaris interactive thread with a time quantum of 80 has a higher priority than an interactive thread with a time quantum of 120.