Deadline-aware Memory Scheduler and Governor for Heterogeneous Processors

Mobile systems are usually equipped with heterogeneous processors and memories to trade off power and performance. The energy-efficient scheduling of such system is difficulty from two folders: tasks executed on such system with the end-to-end deadline and with varied power consumption from the heterogeneous component. A deadline-aware scheduler is proposed to deal with the performance degradation from memory bandwidth contention. A DVFS governor to manage processors and memory, and the run-time memory overclocking reclaiming are presented to minimize the energy consumption while maintaining the performance. Evaluation results show considerable schedulability and energy conservation using this framework.