Communication latency aware low power NoC synthesis

Communication latency and power consumption are two competing objectives in network-on-chip (NoC) design. This paper proposes a novel method that unifies these two objectives in a multi-commodity flow (MCF) formulation. With an improved fully polynomial approximation algorithm, power efficient design of an 8 times 8 NoC can be found for given average latency constraints with certain communication bandwidth requirements. Experimental results suggest that (1) compared with mesh, torus and hypercube topologies, the optimized design can improve power latency product by up to 52.1%, 29.4% and 35.6%, respectively. (2) By sacrificing 2% latency, power consumption of the optimized design can be improved by up to 19.4%, which indicates the importance of power and latency co-optimization in NoC design