Real-Time scheduling for power-saving of mixed tasks with periodic and aperiodic

We propose power-saving real-time scheduling method for mixed task sets which consist of both time-based periodic and event-based aperiodic tasks in the automotive operating system. In order to consider power saving, it is necessary to estimate the slack time and minimize the response time of the aperiodic task simultaneously. However, because these two goals conflict with each other, It must compromise between the two goals, depending on the given application domain. In this paper, we find an adjustment factor that improves the response time of the aperiodic task with a slight increase in power consumption. We propose the lccEDF algorithm and balance the two goals by systematically adjusting the factors. Our simulation results show that our approach is excellent in various task sets.