Static Task Scheduling Algorithms Based on Greedy Heuristics for Battery-Powered DVS Systems

Tetsuo YOKOYAMA  Gang ZENG  Hiroyuki TOMIYAMA  Hiroaki TAKADA  

IEICE TRANSACTIONS on Information and Systems   Vol.E93-D    No.10    pp.2737-2746
Publication Date: 2010/10/01
Online ISSN: 1745-1361
DOI: 10.1587/transinf.E93.D.2737
Print ISSN: 0916-8532
Type of Manuscript: PAPER
Category: Software System
battery-aware voltage scheduling,  dynamic voltage scaling,  low power,  real-time systems,  

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The principles for good design of battery-aware voltage scheduling algorithms for both aperiodic and periodic task sets on dynamic voltage scaling (DVS) systems are presented. The proposed algorithms are based on greedy heuristics suggested by several battery characteristics and Lagrange multipliers. To construct the proposed algorithms, we use the battery characteristics in the early stage of scheduling more properly. As a consequence, the proposed algorithms show superior results on synthetic examples of periodic and aperiodic tasks from the task sets which are excerpted from the comparative work, on uni- and multi-processor platforms, respectively. In particular, for some large task sets, the proposed algorithms enable previously unschedulable task sets due to battery exhaustion to be schedulable.