Global EDF scheduling of directed acyclic graphs on multiprocessor systems

Manar Qamhieh 1, * Frédéric Fauberteau 2 Laurent George 1 Serge Midonnet 1
* Auteur correspondant
1 LIGM - Laboratoire d'Informatique Gaspard-Monge
2 LACSC - Laboratoire d'Analyse et Contrôle des Systèmes Complexes
Abstract : In this paper, we study the problem of real-time scheduling of parallel tasks represented by a Directed Acyclic Graph (DAG) on multiprocessor architectures. We focus on Global Earliest Deadline First scheduling of sporadic DAG tasksets with constrained-deadlines on a system of homogeneous processors. Our contributions consist in analyzing DAG tasks by considering their internal structures and providing a tighter bound on the workload and interference analysis. This approach consists in assigning a local offset and deadline for each subtask in the DAG. We derive an improved sufficient schedulability test w.r.t. an existing test proposed in the state of the art. Then we discuss the sustainability of this test.
Keywords : Real-time systems real-time scheduling multiprocessor systems Parallel tasks Directed Acyclic Graphs
Type de document :
Communication dans un congrès
Proceedings of the 21st International conference on Real-Time Networks and Systems, Oct 2013, Sophia Antipolis, France. pp.287-297, 2013, 〈10.1145/2516821.2516836〉
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Manar Qamhieh, Frédéric Fauberteau, Laurent George, Serge Midonnet. Global EDF scheduling of directed acyclic graphs on multiprocessor systems. Proceedings of the 21st International conference on Real-Time Networks and Systems, Oct 2013, Sophia Antipolis, France. pp.287-297, 2013, 〈10.1145/2516821.2516836〉. 〈hal-00878667〉

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