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Mixed-Criticality Scheduling of Sporadic Task Systems

Abstract : We consider the scheduling of mixed-criticality task systems, that is, systems where each task to be scheduled has multiple levels of worst-case execution time estimates. We design a scheduling algorithm, EDF-VD, whose effectiveness we analyze using the processor speedup metric: we show that any 2-level task system that is schedulable on a unit-speed processor is correctly scheduled by EDF-VD using speed φ; here φ < 1.619 is the golden ratio. We also show how to generalize the algorithm to K > 2 criticality levels.We finally consider 2-level instances on m identical machines. We prove speedup bounds for scheduling an independent collection of jobs and for the partitioned scheduling of a 2-level task system.
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Contributor : Gianlorenzo D'Angelo Connect in order to contact the contributor
Submitted on : Wednesday, November 23, 2011 - 1:55:30 PM
Last modification on : Saturday, June 25, 2022 - 11:06:55 PM
Long-term archiving on: : Friday, February 24, 2012 - 2:25:48 AM


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Sanjoy K. Baruah, Vincenzo Bonifaci, Gianlorenzo d'Angelo, Alberto Marchetti-Spaccamela, Suzanne van Der Ster, et al.. Mixed-Criticality Scheduling of Sporadic Task Systems. 19th Annual European Symposium on Algorithms (ESA 2011), Sep 2011, Saarbruecken, Germany. pp.555-566, ⟨10.1007/978-3-642-23719-5_47⟩. ⟨hal-00643987⟩



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