Mixed Criticality Systems with Weakly-Hard Constraints

Oliver Gettings, Sophie Quinton, Robert Ian Davis

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Current adaptive mixed criticality scheduling policies assume
a high criticality mode in which all low criticality tasks are descheduled to ensure that high criticality tasks can meet timing constraints derived from certification approved methods. In this paper we present a new scheduling policy, Adaptive Mixed Criticality - Weakly Hard, which provides a guaranteed minimum quality of service for low criticality tasks in the event of a criticality mode change. We derive response time based schedulability tests for this model. Empirical evaluations are then used to assess the relative performance against previously published policies and their schedulability tests.
Original languageEnglish
Title of host publicationRTNS '15
Subtitle of host publicationProceedings of the 23rd International Conference on Real Time and Networks Systems
Place of PublicationNew York
ISBN (Print)978-1-4503-3591-1
Publication statusPublished - Nov 2015
Event23rd International conference on Real-Time Networks and Systems (RTNS 2015) - , United Kingdom
Duration: 4 Nov 20156 Nov 2015


Conference23rd International conference on Real-Time Networks and Systems (RTNS 2015)
Country/TerritoryUnited Kingdom


  • mixed criticality systems

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