TM-FAR: Turn-Model based Fully Adaptive Routing for Networks on Chip

A novel Turn-Model based Fully-Adaptive-Routing (TM-FAR) algorithm is proposed for Networks-on-Chip (NoC). TM-FAR retains the deadlock-free property of traditional turn-model based routing algorithms (e.g., XY, Odd-Even), while alleviating restrictions on turn and path selections. Just like the current Virtual-Channel based Fully-Adaptive-Routing (VC-FAR) algorithm, TM-FAR allows full exploitation of all available minimal paths, yet TM-FAR does not use virtual channels. This fully adaptive routing capability of TM-FAR promises improved routing adaptivity and enhanced level of fault-tolerance. Preliminary experimental results indicate that the TM-FAR achieves an averaged delay reduction of 30.08% and a throughput rate increase of 4.54% compared to the state-of-the-art NoC routing algorithm based on the Odd-Even turn model.