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Old 12-17-2012, 07:02 PM   #1
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How does a memory system work?

Hey! I have an exercise to solve.

I hope you guys can guide me.

A memory system contains a cache memory, a main memory and a virtual memory.
The cache memory has an access time of 5 nanoseconds and its hit rate is 80%.
The access time for the main memory is 100 nanoseconds and its hit rate is 99.5%.
The access tieme for the virtual memory is 10 milliseconds.

¿What is the average access time for the whole hierachy.
Old 12-17-2012, 07:33 PM   #2
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Per the LQ Rules, please do not post homework assignments verbatim. We're happy to assist if you have specific questions or have hit a stumbling point, however. Let us know what you've already tried and what references you have used (including class notes, books, and Google searches) and we'll do our best to help. Also, keep in mind that your instructor might also be an LQ member.
Old 12-17-2012, 08:23 PM   #3
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Oh, I'm not asking you to resolve my exercise... lol... sorry

I just posted it as a reference, the title of the thread "How does a memory system work?" is what I need to know in order to resolve that exercise...
Old 12-21-2012, 06:14 AM   #4
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Just a hint. Do you know what is indicated with the hit rate?


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