Repeat Problem if the cache access time from the CPU is 1 ns and the main memory has an access time from the CPU of 20 ns.
Problem
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*A cache memory has an access time from the CPU of 4 ns, and the main memory has an access time from the CPU of 40 ns. What is the effective access time for the cache–main memory hierarchy if the hit ratio is:
(a) 0.91,
(b) 0.82, and (c) 0.96?
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