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Discrete Frequency Selection of Frame-Based Stochastic Real-Time Tasks

par Berten, Vandy ;Chang, Chi-Ju;Kuo, Tei-Wei
Référence Proceedings (International Conference on Real-Time Computing Systems and Applications), page (269-278), 4617295
Publication Publié, 2008-08

Article révisé par les pairs

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Résumé :

Energy-efficient real-time task scheduling has been actively explored in the past decade. Different from the past work, this paper considers schedulability conditions for stochastic real-time tasks. A schedulability condition is first presented for frame-based stochastic real-time tasks, and several algorithms are also examined to check the schedulability of a given strategy. An approach is then proposed based on the schedulability condition to adapt a continuous-speed-based method to a discrete-speed system. The approach is able to stay as close as possible to the continuous-speed-based method, but still guaranteeing the schedulability. It is shown by simulations that the energy saving can be more than 20% for some system configurations. © 2008 IEEE.