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

Consider three different processors P1, P2, and P3 executing the same instruction set. P1 has a 3 GHz clock rate and a CPI of 1.5. P2 has a 2.5 GHz clock rate and a CPI of 1.0. P3 has a 4.0 GHz clock rate and has a CPI of 2.0.

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

b) If processor P1 executes a program in 10 seconds, find the number of cycles and the number of instructions.

c) For processor P2, we are trying to reduce the execution time by 30% but this leads to an increase of 20% in CPI. What clock rate (for P2) should we have to get this time reduction?

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