Performance Evaluation Of Dynamic Voltage Scaling Algorithms For Hard Real-Time Systems

Dynamic voltage scaling (DVS) is an effective low-power design technique for embedded real-time systems, adjusting the clock speed and supply voltage dynamically. In this paper, we evaluate state-of-art DVS algorithms recently proposed for hard real-time periodic task sets. W e compare the energy efficiency of the proposed DVS algorithms under various task/system configurations. Experimental results both from the simulation tool and a real H/W-based DVS platform are presented. Our results provide important insights in understanding the performance differences among the proposed DVS algorithms in a unified fashion.