Suppose cache has a hit rate of 0.89 and access time of 5ns, main memory has a hit rate of 0.98 and access time of 60ns, and virtual memory has an access time of 700us (microseconds). What is the average memory access time in us?

Accessing is done first in cache, and then in main memory is a miss occurs, and then in virtual…

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Engineering

Computer Science

rage memory access time in us

Systems Architecture

7th Edition

ISBN:9781305080195

Author:Stephen D. Burd

Publisher:Stephen D. Burd

Chapter4: Processor Technology And Architecture

Section: Chapter Questions

Problem 2PE: If a microprocessor has a cycle time of 0.5 nanoseconds, what’s the processor clock rate? If the...

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Concept explainers

Storage Devices

Storage devices can store digital information/data and applications (in the form of audio, video, image, etc.) to process the result of any computational work. They are a kind of computer hardware that stores information and instruction to be processed. A storage unit is a part of a computer system. Every computer has a storage device. The storage devices work as a memory. They are also known as a storage medium, digital storage, or storage media, which temporarily or permanently store information. They are used either internally or externally in the computer system, server, or any computation device to hold the information. Examples include a pen drive, CD, DVD, floppy disk, memory card and so forth.

Question

Suppose cache has a hit rate of 0.89 and access time of 5ns, main memory has a hit rate of 0.98 and access time of 60ns, and virtual memory has an access time of 700
us (microseconds). What is the average memory access time in us?

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