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Limited preemptive scheduling of mixed time-triggered and event-triggered tasks
Technische Universiteit Eindhoven (TU/e).
Technische Universiteit Eindhoven (TU/e).ORCID-id: 0000-0001-6234-5117
Vise andre og tillknytning
2013 (engelsk)Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

Many embedded systems have complex timing constraints and, at the same time, have flexibility requirements which prohibit offline planning of the entire system. To support a mixture of time-triggered and event-triggered tasks, some industrial systems deploy a table-driven dispatcher for time-triggered tasks complemented with a preemptive scheduler to allocate the free time slots to event-driven tasks. Contrary to fully preemptive scheduling, limiting the preemptions of tasks to fixed preemptions points may reduce memory requirements and it alleviates the preemption costs in the system. We revisit slotshifting, which at run time mixes time-triggered and event-triggered tasks in a preemptive EDF schedule. In this paper, we extend slotshifting with limited-preemptive execution of event-triggered tasks. We present a synchronization protocol to arbitrate the executions of non-preemptive regions, so that time-triggered tasks keep meeting their timing constraints implicitly. Furthermore, we investigate how to disable preemptions of event-triggered tasks during the execution of the offline-scheduled time-triggered tasks, while keeping the feature of slotshifting to reallocate their slots of execution dynamically at run time.

sted, utgiver, år, opplag, sider
2013. s. Article number 6648046-
HSV kategori
Identifikatorer
URN: urn:nbn:se:mdh:diva-21389DOI: 10.1109/ETFA.2013.6648046Scopus ID: 2-s2.0-84890666064ISBN: 9781479908622 (tryckt)OAI: oai:DiVA.org:mdh-21389DiVA, id: diva2:648809
Konferanse
18th IEEE Conference on Emerging Technologies and Factory Automation (ETFA 2013), Cagliari, Italy, 10-13 September 2013
Tilgjengelig fra: 2013-09-17 Laget: 2013-09-11 Sist oppdatert: 2015-11-13bibliografisk kontrollert

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