8. Given the information about the 4 CPUs (processors) in the following table, answer the questions below explaining briefly how you got your answers. (Note that a processor with multiple cores can run multiple, different programs/jobs at the same time. With 2 cores, you can run 2 programs, with 3 cores you can run 3 programs, etc.) Note also that each sub-question is independent of all the others unless explicitly stated otherwise Feature Clock rate Average CPI Number of cores Cost CPU-1 3.9 GHz 4.2 CPU-2 2.85 GHz 4.2 CPU-3 1.85 GHz 5.2 CPU-4 5.4 GHz 6.45 $275 S425 S675 S350 Page 2 of 5 [ a. How long does it take to run a single 30 x 109 instruction program on CPU-4? [1] b. How long does it take to run 20 such programs on CPU-1? [1] c. How long does it take to run 40 such programs on CPU-3? [5] d. Based on what you learned in deriving your answers to parts a-c and considering that each program consists of a mere 25 instructions, which CPU offers the best throughput (i.e. total amount of work accomplished per unit time)? Show your work & explain! [2] e. How much faster is CPU-2 than CPU-1? You should consider two cases - a single program/iob executed per CPU and a stream of iobs executed per CPU. [2] [2] f. Which CPU will run a single job the fastest? Explain! g. Which CPU is most cost effective in terms of throughput (based on your answer to part d)? Explain! [3] h. Which CPU is most likely to appeal to a computational scientist who is interested in doing a lot of computation to solve a single large problem and has a large grant to pay for computing equipment? Assume that the program does not make use of multiple cores in the CPU. Explain! [3] i. Which CPU is most likely to appeal to a business executive who is a "low-end multi-tasker" running several interactive but not computationally intensive programs at once (e.g. spreadsheet, financial planning software, web browser, etc.)? Naturally, cost is a concern since this is a business environment. Explain! 8. Given the information about the 4 CPUs (processors) in the following table, answer the questions below explaining briefly how you got your answers. (Note that a processor with multiple cores can run multiple, different programs/jobs at the same time. With 2 cores, you can run 2 programs, with 3 cores you can run 3 programs, etc.) Note also that each sub-question is independent of all the others unless explicitly stated otherwise Feature Clock rate Average CPI Number of cores Cost CPU-1 3.9 GHz 4.2 CPU-2 2.85 GHz 4.2 CPU-3 1.85 GHz 5.2 CPU-4 5.4 GHz 6.45 $275 S425 S675 S350 Page 2 of 5 [ a. How long does it take to run a single 30 x 109 instruction program on CPU-4? [1] b. How long does it take to run 20 such programs on CPU-1? [1] c. How long does it take to run 40 such programs on CPU-3? [5] d. Based on what you learned in deriving your answers to parts a-c and considering that each program consists of a mere 25 instructions, which CPU offers the best throughput (i.e. total amount of work accomplished per unit time)? Show your work & explain! [2] e. How much faster is CPU-2 than CPU-1? You should consider two cases - a single program/iob executed per CPU and a stream of iobs executed per CPU. [2] [2] f. Which CPU will run a single job the fastest? Explain! g. Which CPU is most cost effective in terms of throughput (based on your answer to part d)? Explain! [3] h. Which CPU is most likely to appeal to a computational scientist who is interested in doing a lot of computation to solve a single large problem and has a large grant to pay for computing equipment? Assume that the program does not make use of multiple cores in the CPU. Explain! [3] i. Which CPU is most likely to appeal to a business executive who is a "low-end multi-tasker" running several interactive but not computationally intensive programs at once (e.g. spreadsheet, financial planning software, web browser, etc.)? Naturally, cost is a concern since this is a business environment. Explain