Dynamic voltage leveling scheduling for real-time embedded systems on low-power variable speed processors
Jian-Liang Kuo, Tien-Fu Chen · 2002
One of the energy reduction techniques for embedded systems is Dynamic Voltage Scaling (DVS), which varies processor voltage and clock to achieve desired performance while using minimal amount of energy. By using system control instruction on the voltage and clock-rate, the scheduler in operating systems can vary the execution environment to obtain energy deduction at a cost of the propagation delay and transition time. So minimizing energy and meeting the deadline of tasks are critical problems in hard real-time scheduling policy. In this paper, we propose off-line scheduling policies by leveling the voltage switching for hard real-time embedded systems as well as an online scheduling to take advantages of slack times.