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On emerging multicore systems, task replication is a powerful way to achieve high reliability targets. In this paper, we consider the problem of achieving a given reliability target for a set of periodic real-time tasks running on a multicore system with minimum energy consumption. Our framework explicitly takes into account the coverage factor of the fault detection techniques and the negative impact of Dynamic Voltage Scaling (DVS) on the rate of transient faults leading to soft errors. We characterize the subtle interplay between the processing frequency, replication level, reliability, fault coverage, and energy consumption on DVS-enabled multicore systems. We first develop static solutions and then propose dynamic adaptation schemes in order to reduce the concurrent execution of the replicas of a given task and to take advantage of early completions. Our simulation results indicate that through our algorithms, a very broad spectrum of reliability targets can be achieved with minimum energy consumption thanks to the judicious task replication and frequency assignment.
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Mohammad A. Haque
Institute of Child and Mother Health
Hakan Aydın
Karadeniz Technical University
Dakai Zhu
Baylor College of Medicine
IEEE Transactions on Parallel and Distributed Systems
George Mason University
The University of Texas at San Antonio
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Haque et al. (Tue,) studied this question.
synapsesocial.com/papers/6a12d3a572dbc73dabc07691 — DOI: https://doi.org/10.1109/tpds.2016.2600595
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