Dynamic voltage scaling and power management for portable systems

  • Authors:
  • Tajana Simunic;Luca Benini;Andrea Acquaviva;Peter Glynn;Giovanni De Micheli

  • Affiliations:
  • Computer Systems, Laboratory, Stanford University;DEIS, University of Bologna;DEIS, University of Bologna;Management Science and Engineering Department, Stanford University;Computer Systems, Laboratory, Stanford University

  • Venue:
  • Proceedings of the 38th annual Design Automation Conference
  • Year:
  • 2001

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Abstract

Portable systems require long battery lifetime while still delivering high performance. Dynamic voltage scaling (DVS) algorithms reduce energy consumption by changing processor speed and voltage at run-time depending on the needs of the applications running. Dynamic power management (DPM) policies trade off the performance for the power consumption by selectively placing components into low-power states. In this work we extend the DPM model presented in [2, 3] with a DVS algorithm, thus enabling larger power savings. We test our approach on MPEG video and MP3 audio algorithms running on the SmartBadge portable device [1]. Our results show savings of a factor of three in energy consumption for combined DVS and DPM approaches.