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Uncertainty-Based Scheduling: Energy-Efficient Ordering for Tasks with Variable Execution Time

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Author

Summary, in English

Energy consumption reduction is today an important design issue for all kinds of digital systems. Offering both flexibility and efficient energy management, variable speed processor architectures are prefered for low energy consumption even in hard real-time systems. For this type of systems, the main approach consists in trading speed for lower energy while meeting all deadlines. For tasks with varying execution time, speed scheduling is most efficient if performed at run-time. This paper presents a new ordering technique for such tasks, that reduces the energy consumption resulting from the run-time speed scheduling. Without affecting the real-time behavior, our Uncertainty-Based Scheduling (UBS) is a low complexity but energy-efficient method that can be applied on top of already existent real-time scheduling techniques, such as EDF. These claims are backed up by extensive simulation results accompanied by measurements on a platform based on an Intel 180200 XScale processor.

Publishing year

2003

Language

English

Pages

465-468

Publication/Series

Proceedings of the International Symposium on Low Power Design

Document type

Conference paper

Publisher

Association for Computing Machinery (ACM)

Topic

  • Computer Science

Keywords

  • Dynamic voltage scaling
  • Run-time power management

Conference name

Proceedings of the 2003 International Symposium on Low Power Electronics and Design, (ISLPED'03)

Conference date

2003-08-25 - 2003-08-27

Conference place

Seoul, Korea, Republic of

Status

Published

Research group

  • ESDLAB

ISBN/ISSN/Other

  • ISBN: 1-58113-682-X