Certain investigations on energy saving techniques using DVS for low power embedded system

Authors:
A. Chilambuchelvan;S. Saravanan;B. Chidhambararajan;J. Raja Paul Perinbam
Affiliations:
Department of ECE, IRTT, Erode, Tamilnadu, India;Department of EEE, JCE, Chennai, Tamilnadu, India;Department of ECE, MEC, Tiruchencode, Tamilnadu, India;Department of ECE, CEG, Anna University, Tamil Nadu, India
Venue:
AIC'06 Proceedings of the 6th WSEAS International Conference on Applied Informatics and Communications
Year:
2006

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Abstract

Energy consumption has become an important aspect while designing a portable embedded system. Dynamic voltage scaling (DVS) is an energy saving technique, reducing energy dissipation of the core by lowering the supply voltage and operating frequency, so that battery life of portable devices can be extended. In this paper it is discussed about a simulation environment to test various DVS algorithms because there are no standard simulators readily available in market. The simulator environment provides a framework for objective performance evaluations of various DVS algorithms. It is compared several key DVS algorithms recently proposed for hard real-time periodic task sets, analyze their energy efficiency, and discuss the performance differences quantitatively. We show through simulations these real time DVS algorithms closely approach the theoretical lower bound on energy consumption, and can easily reduce energy consumption 20% to 30% in an embedded real-time system.