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Improving the Schedulability of Sporadic Self-Suspending Soft Real-Time Multiprocessor Task Systems
 

Summary: Improving the Schedulability of Sporadic Self-Suspending Soft Real-Time
Multiprocessor Task Systems
Cong Liu and James H. Anderson
Department of Computer Science, University of North Carolina at Chapel Hill
Abstract
In work on globally-scheduled soft real-time multipro-
cessor systems, analysis has been presented for dealing with
self-suspensions, but this analysis can be pessimistic. In this
paper, we present an approach that is designed to improve
the schedulability of such systems. In experimental results
that are presented, the proposed approach significantly im-
proved schedulability in most considered scenarios.
1 Introduction
In many real-time systems, tasks self-suspend due to in-
teractions with external devices such as disks and network
cards. The suspension delays introduced by such behav-
iors can quite negatively impact schedulability if deadline
misses cannot be tolerated [13]. The most common way
to deal with such suspensions in analysis is to treat them
as computation. However, if suspension times can be long,

  

Source: Anderson, James - Department of Computer Science, University of North Carolina at Chapel Hill

 

Collections: Computer Technologies and Information Sciences