Energy-Aware Task Scheduling for Real-Time Systems with Discrete Frequencies

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概要

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• Power-aware scheduling of periodic tasks in real-time systems has been extensively studied to save energy while still meeting the performance requirement. Many previous studies use the probability information of tasks execution cycles to assist the scheduling. However, most of these approaches adopt heuristic algorithms to cope with realistic CPU models with discrete frequencies and cannot achieve the globally optimal solution. Sometimes they even show worse results than non-stochastic DVS schemes. This paper presents an optimal DVS scheme for frame-based real-time systems under realistic power models in which the processor provides only a limited number of speeds and no assumption is made on power/frequency relation. A suboptimal DVS scheme is also presented in this paper to work out a solution near enough to the optimal one with only polynomial time expense. Experiment results show that the proposed algorithm can save at most 40% more energy compared with previous ones.

• （社）電子情報通信学会の論文
• 2011-04-01

著者

• JI Xincun

  Southeast University

• Zhang Zhe

  Southeast University

• Hu Chen

  Southeast University

• Hu Chen

  Southeast Univ.

• QIAN Dejun

  Southeast University

• Zhang Zhe

  Southeast Univ.

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