Integrating real time and power management in a real system
Authors
Martin P. Lawitzky, David C. Snowdon and Stefan M. Petters
NICTA
Sydney
Australia
School of Computer Science and Engineering
University of NSW
Sydney 2052
Australia
TU München
Munich
Germany
Abstract
Deploying dynamic voltage and frequency scaling (DVFS) techniques in a real-time context has generated some interest in recent years. However, most of this work is based on highly simplifying assumptions regarding the cost and benefit of frequency scaling. We have integrated a measurement-based DVFS technique with an EDF based scheduling framework. This enables the use of the dynamic slack caused by the variability of execution time, to reduce energy consumption and thus extend battery life or reduce thermal load. We have tested the approach using hardware instrumentation on a real system. This paper describes not only the theoretical basis for the work, but also our experiences with DVFS when confronted with physical reality.
BibTeX Entry
@inproceedings{Lawitzky_SP_08,
title = {Integrating Real Time and Power Management in a Real System},
booktitle = {Proceedings of the 4th Workshop on Operating System Platforms for Embedded Real-Time Applications},
author = {Martin P. Lawitzky and David C. Snowdon and Stefan M. Petters},
year = {2008},
month = {Jul},
address = {Prague, Czech Republic}
}