Software annotations for power optimization on mobile devices

Authors:
Radu Cornea;Alex Nicolau;Nikil Dutt
Affiliations:
University of California, Irvine, CA;University of California, Irvine, CA;University of California, Irvine, CA
Venue:
Proceedings of the conference on Design, automation and test in Europe: Proceedings
Year:
2006

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Abstract

Modern applications for mobile devices, such as multimedia video/audio, often exhibit a common behavior: they process streams of incoming data in a regular, predictable way. The runtime behavior of these applications can be accurately estimated most of the time by analyzing the data to be processed and annotating the stream with the information collected. We introduce a software annotation based approach to power optimization and demonstrate its application on a backlight adjustment technique for LCD displays during multimedia playback, for improved battery life and user experience. Results from analysis and simulation show that up to 65% of backlight power can be saved through our technique, with minimal or no visible quality degradation.