Evaluation of 3D-DiamondMesh Homogeneous and Heterogeneous Architectures

The present work extends the 2D DiamondMesh to 3D homogeneous and heterogeneous DiamondMesh architectures. By incorporating diagonal links into the conventional mesh topology, the 2D DiamondMesh improves network performance while retaining the regular, simple and scalable properties of the Mesh topology. To further improve the performance of the network, 2D DiamondMesh has been extended to 3D DiamondMesh by stacking the 2D layers vertically and interconnecting with through silicon vias (TSVs). In this work, 3D DiamondMesh has been evaluated for different network sizes. Also, five heterogeneous 3D DiamondMesh architectures have been proposed and evaluated. The results have inferred that the heterogenity in topology across the layers have shown a remarkable reduction in latency with slight area overhead or a reduction in the area with a slight penality in performance. An average reduction of 7.83%, 9.59%, 13.18%, 4.80%, 8.85%, 10.50%, 6.56% and 10.63% in APL can be observed with 4Layer-64node XDMesh, DiamondMesh, DMesh, DiamondMesh+Mesh, DiamondMesh+XDMesh, Dia-mondMesh+DMesh, DMesh+Mesh, DMesh+XDMesh architectures respectively over the conventional 4Layer-64node Mesh architecture. Similarly, an average reduction of 9.26%, 21.21%, 25.00%, 10.47%, 15.21%, 23.00%, 12.50% and 16.90% can be observed with 4Layer-256node XDMesh, DiamondMesh, DMesh, DiamondMesh+Mesh, DiamondMesh+XDMesh, Dia-mondMesh+DMesh, DMesh+Mesh, DMesh+XDMesh architectures respectively over the conventional 4Layer-256node Mesh architecture.