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Optimal Checkpoint Placement on Real-Time Tasks with Harmonic Periods

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Abstract

This paper presents an optimal checkpoint strategy for fault-tolerance in real-time systems where transient faults occur in Poisson distribution. In our environment, multiple real-time tasks with different deadlines and harmonic periods are scheduled in the system by rate-monotonic algorithm, and checkpoints are inserted at a constant interval in each task. When a fault is detected, the system carries out rollback to the latest checkpoint and re-executes tasks. The maximum number of re-executable checkpoints and an equation to check schedulability are derived, and the optimal number of checkpoints is selected to maximize the probability of completing all the tasks within their deadlines.

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Authors and Affiliations

  1. Department of Electronic Engineering, Keimyung University, Daegu, 704-701, Korea

    Seong Woo Kwak

  2. Department of Electrical Engineering, Catholic University of Daegu, Gyeongbuk, 712-702, Korea

    Jung-Min Yang

Authors
  1. Seong Woo Kwak
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  2. Jung-Min Yang
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Correspondence to Seong Woo Kwak.

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Kwak, S.W., Yang, JM. Optimal Checkpoint Placement on Real-Time Tasks with Harmonic Periods. J. Comput. Sci. Technol. 27, 105–112 (2012). https://doi.org/10.1007/s11390-012-1209-0

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  • DOI: https://doi.org/10.1007/s11390-012-1209-0

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