Find the AMAT for a processor with a 1 ns clock cycle time, a miss penalty of 20 clock cycles, a miss rate of 0.05 misses per instruction, and a cache access time (including hit detection) of 1 clock cycle. Assume that the read and write miss penalties are the same and ignore other write stalls.

Check the explanation

Explanation:

To answer the question above, we will need to first:

Hittime                      = 2 ns clock

Misspenalty                =20 clock cycles x 2ns

Missrate                     =0.05 misses per instruction

cache access time       = 1 clockcycle.

AMAT for a processor = ?

AMAT= Hit time + (Miss rate × Misspenalty)AMAT = 2 ns + (0.05 . (20 × 2ns)) = 4ns