Integrating job parallelism in real-time scheduling theory

Sébastien Collette (1) , Liliana Cucu (2) , Joël Goossens (1)

1 ULB - Université libre de Bruxelles
2 TRIO - Real time and interoperability

We investigate the global scheduling of sporadic, implicit deadline, real-time task systems on multiprocessor platforms. We provide a task model which integrates job parallelism. We prove that the time-complexity of the feasibility problem of these systems is linear relatively to the number of (sporadic) tasks for a fixed number of processors. We propose a scheduling algorithm theoretically optimal (i.e., preemptions and migrations neglected). Moreover, we provide an exact feasibility utilization bound. Lastly, we propose a technique to limit the number of migrations and preemptions.

Mots clés: Real-time Systems; Scheduling; Multiprocessor Systems; Parallel Systems

Domaines: Systèmes embarqués

Sébastien Collette, Liliana Cucu, Joël Goossens. Integrating job parallelism in real-time scheduling theory. Information Processing Letters, 2008, 106 (5), pp.180-187. ⟨10.1016/j.ipl.2007.11.014⟩. ⟨inria-00192215⟩