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Practical Voltage Scaling for Mobile Multimedia Devices Wanghong Yuan, Klara Nahrstedt
 

Summary: Practical Voltage Scaling for Mobile Multimedia Devices
Wanghong Yuan, Klara Nahrstedt
Department of Computer Science
University of Illinois at Urbana-Champaign
201 N. Goodwin, Urbana, IL 61801, USA
{wyuan1, klara}@cs.uiuc.edu
ABSTRACT
This paper presents the design, implementation, and evaluation of a
practical voltage scaling (PDVS) algorithm for mobile devices pri-
marily running multimedia applications. PDVS seeks to minimize
the total energy of the whole device while meeting multimedia tim-
ing requirements. To do this, PDVS extends traditional real-time
scheduling by deciding what execution speed 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 de-
vice 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 experi-
mental results show that PDVS saves energy substantially without
affecting multimedia performance. It saves energy by 14.4% to

  

Source: Adve, Sarita - Department of Computer Science, University of Illinois at Urbana-Champaign

 

Collections: Computer Technologies and Information Sciences