申論題

1. You are going to enbance a machine, and there are two possible improvements:
either make multiply instructions run four times faster than before, or make memory access instructions run two times faster than before. You repeatedly run a program that takes 200 seconds to execute. Of this time, 50% is used for multiplication, 20% for memory access instructions, and 30% for other tasks. Determine the speedup for the corresponding cases. Copy Table I to your answer sheet and fill your answers.
Enhancement cases:
C1: Improve only multiplication
C2: Improve only memory access
C3: Improve both multiplication and memory access
Table 1.