A. If a memory reference takes 200 nanoseconds, how long does a paged memory reference take? B. If we add associative registers, and 75 percent of all page-table references are found in the associative registers, what is the effective memory reference time? (Assume that finding a page-table entry in the associative registers takes zero time, if the entry is there.)

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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Consider a paging system with the page table stored in memory.
A. If a memory reference takes 200 nanoseconds, how long does a paged
memory reference take?
B. If we add associative registers, and 75 percent of all page-table references
are found in the associative registers, what is the effective memory reference
time? (Assume that finding a page-table entry in the associative registers
takes zero time, if the entry is there.)
Transcribed Image Text:Consider a paging system with the page table stored in memory. A. If a memory reference takes 200 nanoseconds, how long does a paged memory reference take? B. If we add associative registers, and 75 percent of all page-table references are found in the associative registers, what is the effective memory reference time? (Assume that finding a page-table entry in the associative registers takes zero time, if the entry is there.)
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