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2014 | OriginalPaper | Chapter

The Energy/Frequency Convexity Rule: Modeling and Experimental Validation on Mobile Devices

Authors : Karel De Vogeleer, Gerard Memmi, Pierre Jouvelot, Fabien Coelho

Published in: Parallel Processing and Applied Mathematics

Publisher: Springer Berlin Heidelberg

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Abstract

This paper provides both theoretical and experimental evidence for the existence of an Energy/Frequency Convexity Rule, which relates energy consumption and CPU frequency on mobile devices. We monitored a typical smartphone running a specific computing-intensive kernel of multiple nested loops written in C using a high-resolution power gauge. Data gathered during a week-long acquisition campaign suggest that energy consumed per input element is strongly correlated with CPU frequency, and, more interestingly, the curve exhibits a clear minimum over a 0.2 GHz to 1.6 GHz window. We provide and motivate an analytical model for this behavior, which fits well with the data. Our work should be of clear interest to researchers focusing on energy usage and minimization for mobile devices, and provide new insights for optimization opportunities.

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Metadata
Title
The Energy/Frequency Convexity Rule: Modeling and Experimental Validation on Mobile Devices
Authors
Karel De Vogeleer
Gerard Memmi
Pierre Jouvelot
Fabien Coelho
Copyright Year
2014
Publisher
Springer Berlin Heidelberg
Book
Parallel Processing and Applied Mathematics

Print ISBN: 978-3-642-55223-6

Electronic ISBN: 978-3-642-55224-3

Copyright Year: 2014

DOI
https://doi.org/10.1007/978-3-642-55224-3_74

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