Assume an instruction cache miss rate for a program A of 1%, and data cache miss rate of 5%, If a machine has CPI of 2 without any memory stall, and the miss penalty is 50 cycles for all, misses, determine how much faster a machine would run with a perfect cache that never missed. Assume the frequency of load and store in program A is 30%. 答案上面写着 instruction miss cycle: I * 1% * 500 = 5I data miss cycle : I *30% * 5% *500 = 7.5I .............. 我是想问 哪里来的500? 上面只有50耶 --

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