Corollaries to Amdahl's Law for Energy

Provided by: Institute of Electrical & Electronic Engineers
Topic: Hardware
Format: PDF
In this paper, the authors study the important interaction between parallelization and energy consumption in a parallelizable application. Given the ratio of serial and parallel portion in an application and the number of processors, they derive the optimal frequencies allocated to the serial and parallel regions in the application to minimize the total energy consumption, while the execution time is preserved (i.e., speedup = 1). They show that dynamic energy improvement due to parallelization has a function rising faster with the increasing number of processors than the speed improvement function given by the well-known Amdahl's Law.

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