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Energy-Efficient Soft Real-Time CPU Scheduling for Mobile Multimedia Systems
 

Summary: Energy-Efficient Soft Real-Time CPU Scheduling for
Mobile Multimedia Systems
Wanghong Yuan, Klara Nahrstedt
Department of Computer Science
University of Illinois at Urbana-Champaign
1304 W. Springfield Ave, Urbana, IL 61801, USA
{wyuan1, klara}@cs.uiuc.edu
ABSTRACT
This paper presents GRACE-OS, an energy-efficient soft
real-time CPU scheduler for mobile devices that primarily
run multimedia applications. The major goal of GRACE-OS
is to support application quality of service and save energy.
To achieve this goal, GRACE-OS integrates dynamic voltage
scaling into soft real-time scheduling and decides how fast
to execute applications in addition to when and how long to
execute them. GRACE-OS makes such scheduling decisions
based on the probability distribution of application cycle de-
mands, and obtains the demand distribution via online pro-
filing and estimation. We have implemented GRACE-OS
in the Linux kernel and evaluated it on an HP laptop with

  

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

 

Collections: Computer Technologies and Information Sciences