Question: Consider three different processors P1, P2, and P3 executing the same instruction set. P1 has a 3GHz clock rate and a CPI of 1.5. P2

Consider three different processors P1, P2, and P3 executing the same instruction set. P1 has a 3GHz clock rate and a CPI of 1.5. P2 has a 2.5GHz clock rate and a CPI of 1.0, P3 has a 4GHz and a CPI of 2.5

a) Which processor has the highest performance expressed in instructions per second?

b) If the processors each execute a program in 5 seconds, find the number of cycles and the number of instructions.

c) We are trying to reduce the execution time by 20% but this leads to an increase of 15% in the CPI. What clock rate should we have to get this time reduction?

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