Application specific NoC design

Luca Benini

Abstract: Scalable networks on chips (NoCs) are needed to match the ever-increasing communication demands of large-scale multi-processor systems-on-chip (MPSoCs) for high-end wireless communications applications. The heterogeneous nature of on-chip cores and the energy efficiency requirements typical of wireless communications call for application-specific NoCs which eliminate much of the overheads connected with general-purpose communication architectures. However, application-specific NoCs must be supported by adequate design flows to reduce design time and effort. In this paper we survey the main challenges in application-specific NoC design, and we outline a complete NoC design flow and methodology. A case study on a high complexity SoC demonstrates that it is indeed possible to generate an application-specific NoC from a high level specification in a few hours. Comparison with a hand-tuned solution shows that the automatically generated one is very competitive from the area, performance and power viewpoint, while design time is reduced from days to hours