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If Cache access time is 10 ns . main memory access time is 150 ns. Cache hit rate is 99%.

Determine effective access time of system.
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Cache access time is 10 ns

main memory access time is 150 ns.

Cache hit rate is 99% i.e 0.99

To Determine effective access time of system: first we see in cache if it is not found in cache then we look in main memory.

Effective memory access time=0.99*10+0.01*(10+150)=9.9+1.6=11.5 ns
by Loyal (5.7k points)

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