Computers and Technology

Computers and Technology, 19.09.2019 18:00, kkpsmith

Solution another fallacy is to consider that the processor executing the largest number of instructions will need a larger cpu time. considering that processor p1 is executing a sequence of 1.0e9 instructions and that the cpi of processors p1 and p2 do not change, determine the number of instructions that p2 can execute in the same time that p1 needs to execute 1.0e9 instructions.

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Business, 27.06.2019 05:10, bananaslugs

Assume for arithmetic, load/store, and branch instructions, a processor has cpis of 1, 12, and 5, respectively. also assume that on a single processor a program requires the execution of 2.56e9 arithmetic instructions, 1.28e9 load/store instructions, and 256 million branch instructions. assume that each processor has a 2 ghz clock frequency. assume that, as the program is parallelized to run over multiple cores, the number of arithmetic and load/store instructions per processor is divided by 0.7 x p (where p is the number of processors) but the number of branch instructions per processor remains the same.1) find the total execution time for this program on 1, 2, 4, and 8 processors, and show the relative speedup of the 2, 4, and 8 processor result relative to the single processor result.2) if the cpi of the arithmetic instructions was doubled, what would the impact be on the execution time of the program on 1, 2, 4, or 8 processors? 3) to what should the cpi of load/store instructions be reduced in order for a single processor to match the performance of four processors using the original cpi values?

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Computers and Technology, 14.09.2019 02:30, testingawge

Consider three processors (p1, p2, p3), each with the same instruction set. p1 has a 2.0 ghz clock rate and a cpi of 1.5. p2 has a 2.5 ghz clock rate and a cpi of 2.0. p3 has a 4.0 ghz clock rate and a cpi of 2.5. a) compute the instructions per second for each processor. b) for each processor executing a different program in 10 seconds, compute the number of cycles and the number of instructions that were performed. c) for each processor executing the programs in part b, the cpi is increased by 20%. we now wish to reduce the execution time by 30%. what should the new clock rate be for each processor?

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Computers and Technology, 15.10.2019 21:20, mari200150

1.12 section 1.10 cites as a pitfall the utilization of a subset of the performance equation as a performance metric. to illustrate this, consider the following two processors. p1 has a clock rate of 4 ghz, average cpi of 0.9, and requires the execution of 5.0e9 instructions. p2 has a clock rate of 3 ghz, an average cpi of 0.75, and requires the execution of 1.0e9 instructions. [5] < §§1.6, 1.10> one usual fallacy is to consider the computer with the largest clock rate as having the largest performance. check if this is true for p1 and p2. [10] < §§1.6, 1.10> another fallacy is to consider that the processor executing the largest number of instructions will need a larger cpu time. considering that processor p1 is executing a sequence of 1.0e9 instructions and that the cpi of processors p1 and p2 do not change, determine the number of instructions that p2 can execute in the same time that p1 needs to execute 1.0e9 instructions.

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