Question: Assume for a given processor the CPI of arithmetic instructions is 2, the CPI of load/store instructions is 6, and the CPI of branch instructions

Assume for a given processor the CPI of arithmetic instructions is 2, the CPI of load/store instructions is 6, and the CPI of branch instructions is 3. Assume a program has the following instruction breakdowns: 240 million arithmetic instructions, 70 million load/store instructions, 100 million branch instructions.

a. Suppose we find a way to double the performance of the arithmetic instructions. What is the speedup of our machine?

b. If in addition to the arithmetic instruction optimization we also find a way to double the performance of the load/store instructions, what is the overall speedup of our machine?

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