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Demand Paging

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Assume we have a demand-paged memory. The page table is held in registers. It takes 8 ms to service a page fault if an empty page is available or the replaced page is not modified , and 20 ms if the replaced page is modified. Memory access time is 100 ns . Assume that the page to be replaced is modified 70 % of the time. What is the maximum acceptable page fault rate for an effective access time of no more than 200 ns ?

a) 6.1 * 10 ^ - 6

b) 7.3 * 10 ^ - 6

c) 3.4 * 10 ^ - 4

d) None of these

1 Answer

6 6 votes

OPTION A Correct.

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