Mixed-Criticality Real-Time Scheduling for Multicore Systems

Authors:
Malcolm S. Mollison;Jeremy P. Erickson;James H. Anderson;Sanjoy K. Baruah;John A. Scoredos
Affiliations:
-;-;-;-;-
Venue:
CIT '10 Proceedings of the 2010 10th IEEE International Conference on Computer and Information Technology
Year:
2010

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Abstract

Current hard real-time scheduling and analysis techniques are unable to efficiently utilize the computational bandwidth provided by multicore platforms. This is due to the large gap between worst-case execution time predictions used in schedulability analysis and actual execution times seen in practice. In this paper, we view this gap as ``slack'' that can be accounted for during schedulability analysis and reclaimed for less critical work. We use this technique to develop an architecture for scheduling mixed criticality real-time workloads on multiprocessor platforms. Our architecture provides temporal isolation among tasks of different criticalities while allowing slack to be redistributed across criticality levels.