Multi-cast snoop vectors within a mesh topology

Abstract

Techniques for sharing processor data within a network are disclosed. A system-on-a-chip (SOC) is accessed. The SOC includes a network-on-a-chip (NOC), which comprises an M×N mesh topology. The mesh includes a coherent tile at each mesh point. Each tile includes local snoop vectors (LSVs). A first coherent tile initiates a snoop operation. The tile generates a snoop vector that indicates other tiles to be notified of the snoop operation. The first coherent tile creates directional snoop vectors (DSVs). The creating logically combines the snoop vector with each of the LSVs. A coherent tile adjacent to the first coherent tile is selected. The adjacent tile is located in a cardinal direction from the first tile. A first DSV is chosen based on the cardinal direction. The first tile sends the snoop operation and the chosen first DSV to the selected adjacent tile.