Logic-Based Distributed Routing for NoCs

13 years 4 months ago

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—The design of scalable and reliable interconnection networks for multicore chips (NoCs) introduces new design constraints like power consumption, area, and ultra low latencies. Although 2D meshes are usually proposed for NoCs, heterogeneous cores, manufacturing defects, hard failures, and chip virtualization may lead to irregular topologies. In this context, efﬁcient routing becomes a challenge. Although switches can be easily conﬁgured to support most routing algorithms and topologies by using routing tables, this solution does not scale in terms of latency and area. We propose a new circuit that removes the need for using routing tables. The new mechanism, referred to as Logic-Based Distributed Routing (LBDR), enables the implementation in NoCs of many routing algorithms for most of the practical topologies we might ﬁnd in the near future in a multicore chip. From an initial topology and routing algorithm, a set of three bits per switch output port is computed. By using a sm...

José Flich, José Duato

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