j 3. (10 points) Assume Company A and Company B have just manufactured, tested, and benchmarked processors. Each company implements the same ISA using different methods. Compare the two company's processors along the following criteria, and determine which company wins each category. Company A Cost Per Wafer Wafer Diameter Die Area $12,500 300 mm 150 mm2 0.001 defects/mm2 Defects Per Area Company B Cost Per Wafer Wafer Diameter $12,500 300 mm 130 mm2 0.0012 defects/mm2 Die Area Defects Per Area a. Cost: Given the manufacturing data above, which company maintained a lower cost per die? Assume each company's processor is made with the same process technology and has the same number of processing stages. (3 points) b. Power: Given the data below, which company's processor uses more power? By how much (provide a power ratio)? (3 points) Company A Eswitched CL Voltage 1.2 GHz 40x10-9F 0.89 V Company B Eswitched CL Voltage 1.3 GHz 30x10-9F 0.91 V C. Performance: Company A's processor and Company B's processor are benchmarked on the same program. The CPI of the component instructions that are executed in the program are shown above for each processor. Additionally, the number of instructions of each type is provided. Company A 5 Branch CPI Load/Store CPI Arithmetic CPI 7 1 Company B 4 Branch CPI Load/Store CPI Arithmetic CPI 9 1 Program Instruction Count Branch Load/Store Arithmetic CPI 1.2x109 1.67x1010 1.5x1011 i. Using the clock rate given in the previous problem, find the execution time of the benchmark program on the two processors. Which processor is faster and by how much? (2 points) ii. The company with the largest execution time reports that a new feature will be released in a processor revision that will improve the branch CPI by 50%. Using Amdahl's Law, determine the change in execution time. (2 points) j 3. (10 points) Assume Company A and Company B have just manufactured, tested, and benchmarked processors. Each company implements the same ISA using different methods. Compare the two company's processors along the following criteria, and determine which company wins each category. Company A Cost Per Wafer Wafer Diameter Die Area $12,500 300 mm 150 mm2 0.001 defects/mm2 Defects Per Area Company B Cost Per Wafer Wafer Diameter $12,500 300 mm 130 mm2 0.0012 defects/mm2 Die Area Defects Per Area a. Cost: Given the manufacturing data above, which company maintained a lower cost per die? Assume each company's processor is made with the same process technology and has the same number of processing stages. (3 points) b. Power: Given the data below, which company's processor uses more power? By how much (provide a power ratio)? (3 points) Company A Eswitched CL Voltage 1.2 GHz 40x10-9F 0.89 V Company B Eswitched CL Voltage 1.3 GHz 30x10-9F 0.91 V C. Performance: Company A's processor and Company B's processor are benchmarked on the same program. The CPI of the component instructions that are executed in the program are shown above for each processor. Additionally, the number of instructions of each type is provided. Company A 5 Branch CPI Load/Store CPI Arithmetic CPI 7 1 Company B 4 Branch CPI Load/Store CPI Arithmetic CPI 9 1 Program Instruction Count Branch Load/Store Arithmetic CPI 1.2x109 1.67x1010 1.5x1011 i. Using the clock rate given in the previous problem, find the execution time of the benchmark program on the two processors. Which processor is faster and by how much? (2 points) ii. The company with the largest execution time reports that a new feature will be released in a processor revision that will improve the branch CPI by 50%. Using Amdahl's Law, determine the change in execution time. (2 points)
