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Journal of Information Science and Engineering, Vol. 27 No. 3, pp. 1165-1182 (May 2011)

A Real-Time Power Analysis Platform for Power-Aware Embedded System Development*

LIANG-BI CHEN, YEN-LING CHEN AND ING-JER HUANG
Department of Computer Science and Engineering
National Sun Yat-sen University
Kaohsiung, 804 Taiwan
E-mail: {liangbi@eslab.; ijhuang@}cse.nsysu.edu.tw

This paper proposes a real-time power analysis platform, including both hardware and software modules, which is capable of profiling, analyzing and controlling power behavior for power-efficient/aware embedded system applications that can be used for both educational and research purposes. The platform consists of an SoC development board with power measurement probes and supporting power measurement mechanisms, application phase tagging, power analysis, and power control. It allows the developer to profile and analyze the real-time power usage of various major parts of a major hardware system while running an embedded system application on the development board. Application phase tagging makes it possible for the developer to associate the power usage with the application behavior in detail, and the power control mechanism makes it possible to develop power-aware applications capable of dynamically adjusting power behavior while sustaining necessary performance. A digital still camera (DSC) was used as a case study to test this platform. We first characterized the power usage of the DSC and then improved its power efficiency with power-aware operations.

Keywords: embedded systems, energy-aware, low-power design, power analysis, poweraware, power control, power management, power measurement, power optimization

Full Text () Retrieve PDF document (201105_24.pdf)

Received February 15, 2009; revised July 31, 2009 & February 1, 2010; accepted February 26, 2010.
Communicated by Chung-Ta King.
* This paper was partially supported by the National Science Council (NSC) of Taiwan R.O.C. under contracts NSC-96-2815-C-110-037-E and NSC-97-2917-I-110-109.