Given a demand-paged virtual memory system with the following parameters: Page Fault Probability (p) Memory Access Time
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Question:
Page Fault Probability (p)
Memory Access Time
Average time to read a page from disk
(i) Calculate the effective access time.
(ii) What is the slowdown due to the use of demand paging (as a factor of
memory access time)?
0.000001
5nS
10 mS
(iii) What would the page-fault probability have to be to have an overhead
of less than 50% (i.e. so that the average access time would be not
more than 150% of the memory access time)?
Related Book For
Computer Organization and Design The Hardware Software Interface
ISBN: 978-0124077263
5th edition
Authors: David A. Patterson, John L. Hennessy
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