Control and datapath decoupling in the design of a NoC switch: area, power and performance implications

Abstract

Networks on chip are emerging as a disruptive technology to tackle the problem of scalable on-chip communication. An intensive research effort is being devoted to customizing generic network building blocks for specific design objectives such as low-latency or low-power. In this work, we identify in control and datapath decoupling inside a switch architecture an effective means of achieving the needed flexibility, while taking into account the switching, buffering and flow control implications of each design point. We deploy a 65 nm low-power technology library to explore the performance-power trade-off in the design of a NoC switch with area awareness, while leveraging placement-aware logic synthesis tools to deal with the predictability challenges posed by nanoscale designs.