Deadlock-Free Fully Adaptive Routing in Tori Based on a New Virtual Network Partitioning Scheme

A new, deadlock-free, fully adaptive routing algorithm is proposed for worm hole-switched 3-dimensional tori with only two virtual channels. The deadlock avoidance technique is presented based on a new virtual network partitioning scheme. Unlike the previous virtual network partitioning schemes, the new method allows all virtual networks to share some common virtual channels. A new virtual channel assignment scheme is proposed for the 3-dimensional mesh subnetwork by using a channel overlap scheme. A combination of the virtual network partitioning scheme and the channel overlap scheme provides a deadlock-free fully adaptive routing for 3-dimensional tori. Sufficient theoretical analysis on the proposed virtual network partitioning scheme is presented. Simulation results are presented to demonstrate the effectiveness of the proposed algorithm by comparing with several important previous methods.