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Performance analysis of fault-tolerant routing algorithm in wormhole-switched interconnections

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Abstract

With nowadays popularity of large-scale parallel computers, Multiprocessors System-on-Chip (MP-SoCs), multicomputers, cluster computers and peer-to-peer communication networks, fault-tolerant routing becomes an important issue in developing these systems. Fault-tolerant routing algorithms in such systems aim at providing continuous operations in the presence of one or more failures by allowing the graceful degradation of system. The Software-Based fault-tolerant routing scheme has been suggested as an efficient routing algorithm to preserve both communication performance and fault-tolerant demands in parallel computer systems. To study network performance, a number of different analytical models for fault-free routing algorithms have been proposed in the past literature. However, there has not been reported any similar analytical model of fault-tolerant routing in the presence of faulty components. This paper presents a new analytical modeling approach for determining the effects of failures in wormhole-switched 2-D tori using the fault-tolerant Software-Based scheme. More specifically, we describe a general model to derive mathematical expressions to investigate the performance behavior of routing algorithms confronting convex (|-shaped, □-shaped) or concave (U-shaped, +-shaped, T-shaped, H-shaped) faulty regions. The model is validated through comprehensive simulation experiments for different types of failures.

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Authors and Affiliations

  1. Department of Computer Engineering, Iran University of Science and Technology, Tehran, Iran

    F. Safaei & M. Fathy

  2. Department of Electrical and Computer Engineering, University of Tehran, Tehran, Iran

    A. Khonsari

  3. Department of Computing Science, University of Glasgow, Glasgow, UK

    M. Ould-Khaoua

Authors
  1. F. Safaei
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  2. A. Khonsari
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  3. M. Fathy
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  4. M. Ould-Khaoua
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Correspondence to F. Safaei.

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Safaei, F., Khonsari, A., Fathy, M. et al. Performance analysis of fault-tolerant routing algorithm in wormhole-switched interconnections. J Supercomput 41, 215–245 (2007). https://doi.org/10.1007/s11227-007-0114-8

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  • DOI: https://doi.org/10.1007/s11227-007-0114-8

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