A modified dual-priority scheduling algorithm for hard real-time systems to improve energy savings

Authors:
M. Angels Moncusí;Alex Arenas;Jesus Labarta
Affiliations:
Dpt d'Enginyeria Informàtica i Matemàtiques-Universitat Rovira i Virgili;Dpt d'Enginyeria Informàtica i Matemàtiques-Universitat Rovira i Virgili;Dpt d'Arquitectura de Computadors-Universitat Politècnica de Catalunya
Venue:
Compilers and operating systems for low power
Year:
2003

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Abstract

We present a modification of the dual-priority scheduling algorithm for hard real-time systems that takes advantage of its performance to efficiently improve energy saving. The approach exploits the priority scheme to lengthen the runtime of tasks by reducing the speed of the processor and the voltage supply, thereby saving energy by spreading execution cycles up to the maximal time constraints allowed. We show by simulation that our approach improves the energy saving obtained with a pre-emptive fixed-priority scheduling scheme.