Question

what is the hit ratio of a cache if a system performs memory access at 30 nanoseconds with the cache and 150 nanoseconds without it assume the cat uses 20 nanoseconds memory choose the closest estimate ​

Answer 1

I thing a cache if a system performs memory access at 30 nanoseconds

Answer 2

Answer:

93%

Explanation:

hit ratio be h

miss ratio is then 1-h

so,

h * 20 + (1-h) * 170 = 30

150h = 140

h= 93%