multi-resource end-to-end reservations for component-based distributed real-time systems
Energy optimization is a critical design concern for embedded systems. Combining DVFS+DPM is considered as one preferable technique to reduce energy consumption. There are optimal DVFS+DPM algorithms for periodic independent tasks running on uni-processor in the literature. Optimal combination of DVFS and DPM for periodic dependent tasks on multi-core systems is however not yet reported. The challenge of this problem is that the idle intervals of cores is not easy to model. In this paper, a novel technique are proposed to directly model the idle intervals of individual cores such that both DVFS and DPM can be optimized at the same time. Based on this technique, the energy optimization problem is formulated by means of mixed integrated linear programming. We also present techniques to prune the exploration space of the formulation. Experimental results using real-world benchmarks demonstrate the effectiveness of our approach compared to existing approaches.
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