A CPU is equipped with a cache; Accessing a word takes 20 clock cycles if the data is not in the cache and 5 clock cycles if the data is in the cache. What should be the hit ratio if the effective memory access time is 8 clock cycles? 95% O 70% None of them 80% - 90% Question 22 A CPU is equipped with a cache; Accessing a word takes 20 clock cycles if the data is not in the cache and 5 clock cycles if the data is in the cache. What is the effective memory access time in clock cycles if the hit ratio is 90%? O 6.5 O 6.4 None of them 6.3 6.2

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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Question 21
A CPU is equipped with a cache; Accessing a word takes 20 clock cycles if the data is not in the cache and 5 clock cycles if the data is in the cache.
What should be the hit ratio if the effective memory access time is 8 clock cycles?
O 95%
O 70%
O None of them
O 80%
O 90%
Question 22
A CPU is equipped with a cache; Accessing a word takes 20 clock cycles if the data is not in the cache and 5 clock cycles if the data is in the cache.
What is the effective memory access time in clock cycles if the hit ratio is 90%?
O 6.5
O 6.4
O None of them
O 6.3
O 6.2
Transcribed Image Text:Question 21 A CPU is equipped with a cache; Accessing a word takes 20 clock cycles if the data is not in the cache and 5 clock cycles if the data is in the cache. What should be the hit ratio if the effective memory access time is 8 clock cycles? O 95% O 70% O None of them O 80% O 90% Question 22 A CPU is equipped with a cache; Accessing a word takes 20 clock cycles if the data is not in the cache and 5 clock cycles if the data is in the cache. What is the effective memory access time in clock cycles if the hit ratio is 90%? O 6.5 O 6.4 O None of them O 6.3 O 6.2
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