COMPUTER SCIENCE AND ENGINEERING
COMPUTER ARCHITECTURE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It maintain efficiency at a fixed value by simultaneously increasing the number of processors and the size of the problem
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We can add the new resources and system still works
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The efficiency increase linearly with the number of processors
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No correct answer
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Detailed explanation-1: -– Scalable parallel systems. For some parallel systems, the efficiency remains at a fixed value – If both the number of processing elements and the size of the problem are increasing simultaneously. – Such parallel systems are known as scalable parallel systems.
Detailed explanation-2: -The scalability of a parallel algorithm on a parallel architecture is a measure of its capacity to effectively utilize an increasing number of processors.
Detailed explanation-3: -For some systems, the efficiency of a parallel system increases if the problem size is increased while keeping the number of processing elements constant.
Detailed explanation-4: -The scalability of a parallel system is a measure of its capacity to deliver linearly increasing speedup with respect to the number of processors used. It reflects the capacity of the parallel system to effectively utilize an increasing amount of processing resources .
Detailed explanation-5: -Amdahl’s law gives the upper limit of speedup for a problem of fixed size. This seems to be a bottleneck for parallel computing; if one would like to gain a 500 times speedup on 1000 processors, Amdahl’s law requires that the proportion of serial part cannot exceed 0.1%.