Performance Enhancement Techniques for InfiniBand" Architecture
HPCA '03 Proceedings of the 9th International Symposium on High-Performance Computer Architecture
Exploring IBA Design Space for Improved Performance
IEEE Transactions on Parallel and Distributed Systems
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In this paper, we propose a deadlock-free routing in irregular networks using prefix routing. Prefix routing is a special type of routing with a compact routing table associated with each node (processor). Basically, each outgoing channel of a node is assigned a special label and an outgoing channel is selected if its label is a prefix of the label of the destination node. Node and channel labeling in an irregular network is done through constructing a spanning tree. The routing process follows a two-phase process of going up and then down along the spanning tree, with a possible cross channel (shortcut) between two branches of the tree between two phases. We show that the proposed routing scheme is deadlock- and livelock- free.