Abstract: Based on the previous research, a kind of novel network-on-chip which transfers commands and data separately was proposed,with regard to the different rectuirements for the commands transmission and the data transmission in chip-multiprocessors and the characteristics of different topologies in the large and very-large scale. A prototype to this novel network-on-chip named HHSR was presented. HHSR transfers commands and data in two networks-on-chip with different topology in the same chip-multiprocessor, which transfers commands in single hierarchical ring, a kind of network-on-chip with higher speed and higher general performance, to meet the needs for real-time to the commands transmission, and data in 2-D hexagon mesh grid, a kind of network-on-chip with lower speed but lower cost. The prototype guarantees and improves the transmission speed of the commands so as to guarantee and improve the performance of the whole chip-multiprocessors with a little speed-down to the data transmission and a little more cost.

Key words: Chip multiprocessor, Network-on-chip, Topology, Performance simulation