WeDBless: weighted deflection bufferless router for mesh NoCs

Abstract

Bufferless NoC routers employing deflection routing are gaining popularity due to their power and area efficiency. We propose WeDBless, a bufferless deflection router that reduces deflection rate of flits by employing port allocation based on weighted deflection of flits. The proposed method directs the frequently misrouted flits towards their destination by increasing their probability of getting a productive output port. Our evaluations on synthetic traffic patterns show that WeDBless achieves significant reduction in deflection rate, average flit latency and improvement in network saturation point compared to the state-of-the-art bufferless router and reduced complexity in route computing logic.