Towards RTOS support for mixed time-triggered and event-triggered task sets

M.M.H.P. Heuvel, van den, R.J. Bril, J.J. Lukkien, D. Isovic, G. Sankar Ramachandran

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

4 Citations (Scopus)
2 Downloads (Pure)

Abstract

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 real-time operating system (RTOS) with a table-driven dispatcher complemented with a preemptive scheduler to allocate free time slots to event-driven tasks. Rather than allocating dedicated time-slots to time-triggered tasks, we propose to dynamically re-allocate time-slots of time-triggered tasks within a pre-computed time range to maximize the available processing capacity for event-triggered tasks. Although the concept - called slotshifting - is not new, we are unaware of a commercial RTOS with such support. After identifying the mechanisms for an RTOS implementation of slotshifting, we discuss the run-time overheads for admitting aperiodic requests into the system1.
Original languageEnglish
Title of host publicationProceedings of the Work-in-progress (WiP) session of the 17th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA, Kraków, Poland, September 17-21, 2012)
Place of PublicationNew York
PublisherInstitute of Electrical and Electronics Engineers
Pages1-4
ISBN (Print)978-1-4673-4737-2
DOIs
Publication statusPublished - 2012
Event17th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA 2012) - Krakow, Poland
Duration: 17 Sep 201221 Sep 2012
Conference number: 17

Conference

Conference17th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA 2012)
Abbreviated titleETFA 2012
CountryPoland
CityKrakow
Period17/09/1221/09/12
OtherEmerging Technologies & Factory Automation (ETFA)

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