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Effect of frequency scaling granularity on energy-saving strategies.

Authors :
Sundriyal, Vaibhav
Keipert, Kristopher
Sosonkina, Masha
Gordon, Mark S
Source :
International Journal of High Performance Computing Applications. Jul2019, Vol. 33 Issue 4, p590-601. 12p.
Publication Year :
2019

Abstract

Energy efficiency and energy proportional computing have become major constraints in the design of modern exascale platforms. Dynamic voltage and frequency scaling (DVFS) is one of the most commonly used and effective techniques to dynamically reduce power consumption based on workload characteristics. Many energy-saving strategies, however, employ DVFS without considering its applicability level in a given multicore processor. The present work demonstrates that disregarding the DVFS granularity as a design constraint while developing energy-saving strategies may reduce the efficacy of the strategy for certain application classes. Specifically, DVFS applicability levels (called granularities) are determined here for three different Intel processor microarchitectures. Then, the degradation in energy savings is evaluated if the DVFS granularity is disregarded. Experiments were conducted on the widely used quantum chemistry packages, General Atomic and Molecular Electronic Structure System (GAMESS) and NWChem, and show that, for granularity unaware energy-saving techniques, the overall energy consumption may increase by as much as 19%. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
10943420
Volume :
33
Issue :
4
Database :
Academic Search Index
Journal :
International Journal of High Performance Computing Applications
Publication Type :
Academic Journal
Accession number :
137058223
Full Text :
https://doi.org/10.1177/1094342018774405