Practical voltage scaling for mobile multimedia devices


This paper presents the design, implementation, and evaluation of a <i>practical</i> voltage scaling (PDVS) algorithm for mobile devices primarily running multimedia applications. PDVS seeks to minimize the total energy of the whole device while meeting multimedia timing requirements. To do this, PDVS extends traditional real-time scheduling by deciding <i>what execution speed</i> in addition to when to execute what applications. PDVS makes these decisions based on the discrete speed levels of the CPU, the total power of the device at different speeds, and the probability distribution of CPU demand of multimedia applications. We have implemented PDVS in the Linux kernel and evaluated it on an HP laptop. Our experimental results show that PDVS saves energy substantially without affecting multimedia performance. It saves energy by 14.4% to 37.2% compared to scheduling algorithms without voltage scaling and by up to 10.4% compared to previous voltage scaling algorithms that assume an ideal CPU with continuous speeds and cubic power-speed relationship.

DOI: 10.1145/1027527.1027737

Extracted Key Phrases

10 Figures and Tables


Citations per Year

74 Citations

Semantic Scholar estimates that this publication has 74 citations based on the available data.

See our FAQ for additional information.

Cite this paper

@inproceedings{Yuan2004PracticalVS, title={Practical voltage scaling for mobile multimedia devices}, author={Wanghong Yuan and Klara Nahrstedt}, booktitle={ACM Multimedia}, year={2004} }