Vertical-mesh-conscious-dynamic routing algorithm for 3D NoCs

In this paper, a new deadlock-free dynamic turn model named VMCD (vertical-mesh-conscious-dynamic) is proposed for higher performance in 3D NoC. On vertical meshes and odd horizontal meshes, odd-even turn model is applied, while xy routing is utilized on even horizontal meshes. According to the priority of vertical meshes and horizontal meshes, two VMCD routing algorithms are applied based on this turn model. Compared with the Z-odd-even (ZOE) and balanced-odd-even (BOE), the proposed VMCD algorithms take adaptiveness and network balance into account simultaneously and show better performance including average latency and throughput. Compared to ZOE on 8∗8∗2 and 8∗8∗4 mesh, the improvement of throughput can be up to 68.5% and 9.3% respectively for the random traffic and 14.3% and 20% respectively for the transpose traffic pattern. The performance improvement is much more remarkable compared with BOE routing algorithm.