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MORA: An Energy-Aware Slack Reclamation Scheme for Scheduling Sporadic Real-Time Tasks upon Multiprocessor Platforms

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2 Author(s)
Vincent Nelis ; Dept. of Comput. Sci., Univ. Libre de Bruxelles (U.L.B.), Brussels, Belgium ; Joël Goossens

In this paper, we address the global and preemptive energy-aware scheduling problem of sporadic constrained-deadline tasks on DVFS-identical multiprocessor platforms. We propose an online slack reclamation scheme which profits from the discrepancy between the worst- and actual-case execution time of the tasks by slowing down the speed of the processors in order to save energy. Our algorithm called MORA takes into account the application-specific consumption profile of the tasks. We demonstrate that MORA does not jeopardize the system schedulability and we show by performing simulations that it can save up to 32% of energy (in average) compared to execution without using any energy-aware algorithm.

Published in:

2009 15th IEEE International Conference on Embedded and Real-Time Computing Systems and Applications

Date of Conference:

24-26 Aug. 2009