Going Enhance Computer Two Possible Improvements Either Make Multiply Instructions Run Fou Q43842441
You are going to enhance a computer, and there are two possibleimprovements: either make multiply instructions run four timesfaster than before, or make memory access instructions run twotimes faster than before. The computer is used for a program thattakes 100 seconds to execute. Of this time, 24% is used formultiplication, 50% for memory access instructions, and 26% forother tasks.
(a) What will the speedup (ratio of old to new execution time)be if only multiplication is improved?
(b) What will the speedup be if only memory access is improved?(c) What will the speedup be if both improvements are made?
(2 marks) Suppose that a SPEC benchmark suite contains 4benchmarks, with running times on a system A of 5, 8, 2, and 50seconds, respectively, and running times on a system B of 4, 11, 6,and 30 seconds, respectively. Which system would have a better(i.e. larger) SPEC rating, and by what factor?
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