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Replica-Aware Co-Scheduling for Mixed-Criticality

Authors Eberle A. Rambo, Rolf Ernst

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Eberle A. Rambo
Rolf Ernst

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Eberle A. Rambo and Rolf Ernst. Replica-Aware Co-Scheduling for Mixed-Criticality. In 29th Euromicro Conference on Real-Time Systems (ECRTS 2017). Leibniz International Proceedings in Informatics (LIPIcs), Volume 76, pp. 20:1-20:20, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2017) https://doi.org/10.4230/LIPIcs.ECRTS.2017.20

Abstract

Cross-layer fault-tolerance solutions are the key to effectively and efficiently increase the reliability in future safety-critical real-time systems. Replicated software execution with hardware support for error detection is a cross-layer approach that exploits future many-core platforms to increase reliability without resorting to redundancy in hardware. The performance of such systems, however, strongly depends on the scheduler. Standard schedulers, such as Partitioned~Strict Priority Preemptive (SPP) and Time-Division Multiplexing (TDM)-based ones, although widely employed, provide poor performance in face of replicated execution. In this paper, we propose the replica-aware co-scheduling for mixed-critical systems. Experimental results show schedulability improvements of more than 1.5x when compared to TDM and 6.9x when compared to SPP.

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Keywords
  • replicated execution
  • scheduling
  • fault-tolerance
  • real-time systems

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