An Efficient Fault-Tolerant Routing Methodology for Meshes and Tori

In this paper we present a methodology to design fault-tolerant routing algorithms for regular direct interconnection networks. It supports fully adaptive routing, does not degrade performance in the absence of faults, and supports a reasonably large number of faults without significantly degrading performance. The methodology is mainly based on the selection of an intermediate node (if needed) for each source-destination pair. Packets are adaptively routed to the intermediate node and, at this node, without being ejected, they are adaptively forwarded to their destinations. In order to allow deadlock-free minimal adaptive routing, the methodology requires only one additional virtual channel (for a total of three), even for tori. Evaluation results for a

• Type: Journal
• Year: 2004
• Where: CAL
• Authors: María Engracia Gómez, José Duato, Jose Flich, Pedro López, Antonio Robles, Nils Agne Nordbotten, Olav Lysne, Tor Skeie
• Keywords: CAL 2004, CAL 2008, Intermediate Node, Methodology, Regular Direct Interconnection