Job partitioning strategies for multiprocessor scheduling of real-time periodic tasks with restricted migrations

Authors:
Joël Goossens;Pascal Richard;Markus Lindström;Irina Iulia Lupu;Frédéric Ridouard
Affiliations:
Université libre de Bruxelles, Belgium;LIAS/Ensma & Universitéé de Poitiers, France;Université libre de Bruxelles, Belgium;Université libre de Bruxelles, Belgium;LIAS/Ensma, France
Venue:
Proceedings of the 20th International Conference on Real-Time and Network Systems
Year:
2012

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Abstract

In this work, we consider the scheduling of real-time periodic tasks on multiprocessors under a restricted-migration constraint (tasks are allowed to migrate whereas jobs are not). We first propose a technique, (offline) job partitioning, which statically assigns jobs to processors before execution. We show that (offline) job partitioning strictly dominates both partitioned and restricted-migration scheduling. We then consider r-RM, a restricted-migration variant of global RM, we design a sufficient schedulability test and we provide a speedup factor for the scheduler.