When scheduling processes on multiple cores, which is the following is not a valid state- ment?...

When scheduling processes on multiple cores, which is the following is not a valid state-
ment?
Having a run queue per core reduces contention
Scheduling affinity (keeping a process executing on the same core) promotes good cache perfor-
mance
Work stealing is when work owned by a particular core is illicitly taken by another core without
permission

Which of the following is not a valid transition between process states?
A process that is waiting for I/O can be dispatched and given the CPU to execute when the I/O
completes
A process that is on the run queue can be dispatched and given the CPU to execute
A process that is running can be preempted and placed on the run queue

Expert Solution

Hi, I would love to answer you with this question, hope you will like an answer and get a clear idea related to the same. So not wasting much time lets get started with the question.

Ans.1 When scheduling processes on multiple cores, which is the following is not a valid statement?

Work stealing is when work owned by a particular core is illicitly taken by another core without permission . This is wrong option as the work in the queue of the one processor in not illicitly taken the other core takes the work when its free and to contribute to the work on the other core.

Ans.2 Which of the following is not a valid transition between process states?

A process that is waiting for I/O can be dispatched and given the CPU to execute when the I/O
completes. This is not a correct transition as if the processes waiting for the I/O can be preempted and send to to the run queue where all other processes are also scheduled and those will be sent to the CPU for the completion.

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venereology answered 1 year ago

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