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Dynamic voltage and frequency scaling for optimal real-time scheduling on multiprocessors

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4 Author(s)
Funaoka, K. ; Grad. Sch. of Sci. & Technol., Keio Univ., Yokohama ; Takeda, A. ; Kato, S. ; Yamasaki, N.

Not only system performance but also energy efficiency is critically important for embedded systems. Optimal real-time scheduling is effective to not only schedulability improvement but also energy efficiency for the systems. In this paper, real-time dynamic voltage and frequency scaling (RT DVFS) techniques based on the theoretically optimal real-time static voltage and frequency scaling (RTSVFS) techniques proposed in our previous work are presented for multiprocessor systems. Simulation results show that RT-DVFS covers up the disadvantages of RT-SVFS in the sense that RTDVFS are not practically affected by the difference among systems, whereas the energy consumption of RT-SVFS highly depends on the selectable processor frequency especially in high system utilization.

Published in:

Industrial Embedded Systems, 2008. SIES 2008. International Symposium on

Date of Conference:

11-13 June 2008