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Schedulability Analysis of Sporadic Tasks with Multiple Criticality Specifications

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2 Author(s)
Sanjoy Baruah ; North Carolina Univ., Chapter Hill, NC ; Steve Vestal

In a paper that was presented at the recently-concluded real-time systems symposium, Vestal proposed a new real-time task model that is able to represent the fact that the worst-case execution time (WCET) of a single task may be determined to different levels of accuracy with different degrees of confidence. In systems with multiple criticality requirements -different tasks need to be assured of meeting their deadlines with different levels of confidence - such multiple specifications of WCET may be exploited to obtain better processor utilization.This paper conducts a thorough study of the feasibility and schedulability questions for such multi-criticality real-time task systems when implemented upon preemptive uniprocessor platforms.

Published in:

2008 Euromicro Conference on Real-Time Systems

Date of Conference:

2-4 July 2008