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978326187 发布于 2017/03/07 22:03
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2.47 Assume that for a given program 70% of the executed instructions are arithmetic, 10% are load/store, and 20% are branch.
2.47.1  Given the instruction mix and the assumption that an arithmetic instruction requires 2 cycles, a load/store instruction takes 6
cycles, and a branch instruction takes 3 cycles, find the average CPI.
2.47.2 For a 25% improvement in performance, how many cycles, on average, may an arithmetic instruction take if load/store and
branch instructions are not improved at all?

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