A common fallacy is to use MIPS to compare the performace of two different processors, and consider that the processor with the largest MIPS has the largest performance. Check if this is true for P1 and P2. (2) Another common performace figure is MFLOPS, defined as
Section 1.0 cites as a pitfall the utilization of a subset of the performace equation as a performance metric. To illustrate this, consider the following two processors. P1 has a clock rate of 4GHz, average CPI of 0.9, and requires the execution of 5.0E9 instructions. P2 has a clock rate of 3GHz, an average CPI of 0.75, and requires the execution of 1.0E9 instructions.
(1) A common fallacy is to use MIPS to compare the performace of two different processors, and consider that the processor with the largest MIPS has the largest performance. Check if this is true for P1 and P2.
(2) Another common performace figure is MFLOPS, defined as
MFLOPS = No. FP operations / (execution time x 1E6)
but this figure has the same problems as MIPS. Assume that 40% of the instructions executed on both P1 and P2 are floating-point instructions. Find the MFLOPS figures for the processors.
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