In many real-life situations, you may be called upon to determine the relative p
ID: 3673760 • Letter: I
Question
In many real-life situations, you may be called upon to determine the relative performance of given different computing systems. In this case, you have to know what characteristics determine performance. Is it the cost, circuit size, or the speed? In this assignment, three different computing system are given; you must determine which has the highest performance.
Consider three different processors P1, P2, and P3, executing the same instruction set. P1 has a 2 GHz clock rate and a CPI of 1.5. P2 has 2.0 GHz clock rate and a CPI of 1.0. P3 has a 4 GHz clock rate and a CPI of 2.5.
Which processor has the highest performance? Please be sure to show and explain the detailed steps of how you arrived at your answer in your submission.
Explanation / Answer
It is faster speed, larger memories, smaller physical size and lower cost that determines the higher performance of many real life computing system.
processor P2 has the highest performance
performance of P1 (instructions/sec) = 2 x 10^9/1.5 = 1.33 x10^9
performance of P2 (instructions/sec) = 2 x10^9/1.0 = 2×10^9
performance of P3 (instructions/sec) = 4x 10^9/2.5 = 1.6 x 10^9
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