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Evaluating a DVS Scheme for Real-Time Embedded Systems

Dynamic voltage scaling (DVS) has become a well-known and effective technique to exploit energyperformance trade-off in real-time embedded systems where energy imposes a major constraint. We focus on frame-based real-time systems that execute variable workloads with the goal of minimizing expected energy consumption in the system while still meeting the deadlines. In our previous publication [15], We showed that failing to capture the dynamic behavior of the tasks by the existing DVS schemes lead to suboptimal power management and proposed an optimal DVS scheme under the assumption of unresticted continuous frequency. Although issues that arise when applying the optimal DVS scheme in practice were discussed in [15], it remains unknown how it performs in the real world. In this paper, we present demonstration and extensive evaluations of our DVS scheme, including comparsion with the existng DVS schemes.