Synthesis of Flexible Fault-Tolerant Schedules with Preemption for Mixed Soft and Hard Real-Time Systems

Viacheslav Izosimov, Paul Pop, Petru Eles, Zebo Peng

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    Abstract

    In this paper we present an approach for scheduling with preemption for fault-tolerant embedded systems composed of soft and hard real-time processes. We are interested to maximize the overall utility for average, most likely to happen, scenarios and to guarantee the deadlines for the hard processes in the worst case scenarios. In many applications, the worst-case execution times of processes can be much longer than their average execution times. Thus, designs for the worst-case can be overly pessimistic, i.e., result in low overall utility. We propose preemption of process executions as a method to generate flexible schedules that maximize the overall utility for the average case while guarantee timing constraints in the worst case. Our scheduling algorithms determine off-line when to preempt and when to resurrect processes. The experimental results show the superiority of our new scheduling approach compared to approaches without preemption.
    Original languageEnglish
    Title of host publication11th Euromicro Conference on Digital System Design
    PublisherIEEE
    Publication date2008
    ISBN (Print)9780769532776
    DOIs
    Publication statusPublished - 2008
    EventEuromicro Conference on Digital System Design - Parma, Italy
    Duration: 1 Jan 2008 → …
    Conference number: 11th

    Conference

    ConferenceEuromicro Conference on Digital System Design
    Number11th
    CityParma, Italy
    Period01/01/2008 → …

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