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Choosing the correct quantum size is important to the effective operation of an operating system. Later in the text we will consider the issue of

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Choosing the correct quantum size is important to the effective operation of an operating system. Later in the text we will consider the issue of quantum determination in depth. For now, let us anticipate some of the problems. Consider a single-processor timesharing system that supports a large number of interactive users. Each time a process gets the processor, the interrupting clock is set to interrupt after the quantum expires. This allows the operating system to prevent any single process from monopolizing the processor and to provide rapid response to interactive processes. Assume a single quantum for all processes on the system. a What would be the effect of setting the quantum to an extremely large value, say 10 minutes? b What if the quantum were set to an extremely small value, say a few processor cycles? c Obviously, an appropriate quantum must be between the values in (a) and (b). Suppose you could turn a dial and vary the quantum, starting with a small value and gradually increasing. How would you know when you had chosen the "right" value? d What factors make this value right from the user's standpoint? e What factors make it right from the system's standpoint

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