You are redesigning a system. You can replace the existing single processor by two P processors or by four Q processors. However, the P processors are able to run 80% of the code in parallel, whereas the Q processors are able to run 50% of the code in parallel. Which is the better option?
What will be an ideal response?
If we use two P processors the time is 0.20 (unchanged) + 0.80/2 = 0.20 + 0.40 = 0.60.
If we use four Q processors the time is 0.50 (unchanged) + 0.50/4 = 0.50 + 0.125 = 0.625. Therefore the twoprocessor
option is the better.
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