A dynamic frequency scaling solution to DPM in embedded Linux systems

Author

Yuhua, Zhang ; Longhua, Qian ; Qiang, Lv ; Peide, Qian ; Lei, Zhao

Author_Institution

Sch. of Comput. Sci. & Technol., Soochow Univ., Suzhou, China

fYear

2009

fDate

10-12 Aug. 2009

Firstpage

256

Lastpage

261

Abstract

Traditional power management enables CPU to switch among different power consumption modes such as running, idle and standby to save energy to a certain degree. In battery-powered embedded Linux systems, power management plays an even more important role than in desktops. This paper proposes a solution to dynamic power management (DPM) based on dynamic frequency scaling (DFS). According to the system workload, it switches the working frequency among several predefined settings. This paper presents a design and implementation of the solution in an embedded Linux system. Experimental results on an Intel PXA250-based system have demonstrated that the system running a DPM-enabled Linux can save up to 44% of execution time with less than 8% extra power consumption in an email application.

Keywords

Linux; embedded systems; power aware computing; CPU; Intel PXA250-based system; battery-powered embedded Linux system; dynamic frequency scaling solution; dynamic power management; power consumption; Battery management systems; Dynamic voltage scaling; Electronic mail; Embedded system; Energy consumption; Energy management; Frequency; Linux; Power system management; Switches; Dynamic Frequency Scaling; Dynamic Voltage Scaling; Embedded Linux;

fLanguage

English

Publisher

ieee

Conference_Titel

Information Reuse & Integration, 2009. IRI '09. IEEE International Conference on

Conference_Location

Las Vegas, NV

Print_ISBN

978-1-4244-4114-3

Electronic_ISBN

978-1-4244-4116-7

Type

conf

DOI

10.1109/IRI.2009.5211561

Filename

5211561