NDLI: DFR-EDF: A Unified Energy Management Framework for Real-Time Systems

Content Provider	IEEE Xplore Digital Library
Author	Devadas, V. Aydin, H.
Copyright Year	2010
Abstract	Dynamic Voltage Scaling (DVS) and Dynamic Power Management (DPM) techniques form the basis of numerous energy management schemes proposed for real-time embedded systems. DVS targets reducing the dynamic CPU energy consumption, while DPM attempts to reduce theenergy consumption of idle devices by putting them to low-power states over sufficiently long intervals. It is imperative that the system-wide energy management schemes efficiently integrate DVS and DPM while exploiting the subtle trade-off dimensions. In this paper, we develop and propose a unified framework for periodic real-time tasks where DVS and DPM are judiciously combined. The framework, called DFR-EDF, assumes a general system-level energy model and includes both static and dynamic(online) components. The static part is based on the extension of the recently proposed Device Forbidden Regions (DFRs) approach to Earliest-Deadline-First (EDF) scheduling. The online component integrates the predictive DPM techniques and offers a generalized slack reclaiming mechanism that can be used by DVS and DPMsimultaneously. Our experimental evaluation indicates significant gains of DFR-EDF at the system-level compared to the state-of-the-art solutions. Finally, this research effort makes another contribution by formally showing that optimally solving the DPM problem in periodic real-time execution settings is NP-Hard in the strong sense, even in the absence of DVS.
Starting Page	121
Ending Page	130
File Size	416760
Page Count	10
File Format	PDF
ISBN	9781424466900
ISSN	10801812
e-ISBN	9781424466917
DOI	10.1109/RTAS.2010.32
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-04-12
Publisher Place	Sweden
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Real time systems Energy consumption Energy Management Power system management Dynamic voltage scaling Dynamic Power Management Application software Voltage control Runtime Embedded system Frequency Energy management Dynamic Voltage Scaling Real-Time Systems
Content Type	Text
Resource Type	Article

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