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Power-Aware Scheduling for Mixed Real-Time Tasks

주기성과 산발성 태스크가 혼합된 시스템을 위한 전력절감 스케줄링 기법

  • 공민식 (충남대학교 공과대학원 컴퓨터공학부) ;
  • 정근재 (충남대학교 공과대학원 컴퓨터공학부) ;
  • 송예진 (충남대학교 공과대학원 컴퓨터공학부) ;
  • 정명조 (충남대학교 공과대학원 컴퓨터공학부) ;
  • 조문행 (충남대학교 공과대학원 컴퓨터공학부) ;
  • 이철훈 (충남대학교 공과대학원 컴퓨터공학부)
  • Published : 2007.01.28

Abstract

In this paper, we address a power-aware scheduling algorithm for a mixed real-time system which consists of periodic and sporadic tasks, each of which is characterized by its minimum period, worst-case execution requirement and deadline. We propose a dynamic voltage scaling algorithm called DVSMT(DVS for mixed tasks), which dynamically scales down the supplying voltage(and thus the frequency) using on-line distribution of the borrowed resources when jobs complete while still meeting their deadlines. With this scheme, we could reduce more energy consumption. As the proposed algorithm can be easily incorporated with RTOS(Real-Time Operating System), it is applicable for handhold devices and sensor network nodes that use a limited battery power. Simulation results show that DVSMT saves up 60% more than the existing algorithms both in the periodic-task and mixed-task systems.

Keywords

Periodic Tasks;Sporadic Tasks;Dynamic Voltage Scaling;Power-Aware Scheduling

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