Fault-Tolerant Broadcasting in Wormhole-Routed Torus Networks

  • Authors:
  • Seungjin Park;Steven Seidel;Jong-Hoon Youn

  • Affiliations:
  • -;-;-

  • Venue:
  • IPDPS '02 Proceedings of the 16th International Parallel and Distributed Processing Symposium
  • Year:
  • 2002

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Abstract

This paper describes a fault-tolerant broadcast algorithm for wormhole-routed torus networks for which there is only local knowledge of faulty components. This algorithm tolerates up to k-1 faulty nodes in a k-ary n-cube provided the faults do not cause the network to be disconnected. Based on fault-tolerant dimension-order unicast communication, this algorithm is deadlock-free and no additional virtual channels are needed. The first stage of this algorithm is itself an optimal broadcast algorithm for a torus if no faults are present. The second stage overcomes the presence of up to k-1 faults with a fixed number of additional message transmissions. Thus, the cost of this algorithm is within a constant factor of the cost of optimal non-faulttolerant broadcast algorithms.