Adaptive fault-tolerant wormhole routing with two virtual channels in 2D meshes

Abstract

An adaptive fault-tolerant wormhole routing algorithm based on a convex fault model in 2D meshes is presented. With the algorithm, a normal routing message, when blocked by faulty processors, would detour along some special polygons around the fault region. The result is that the proposed algorithm can tolerate convex faults with only two virtual channels per physical channel regardless of the overlapping of the boundaries of different fault regions. The convex fault model used does not include any nonfaulty processors and the proposed algorithm is deadlock-free.