Evaluation of Bufferless Network-On-Chip with Parallel Port Allocator

Abstract

Multicore network-on-chip when scales upto hundred of nodes, energy consumption, design complexity and cost increases multifold owing to structure of interconnect. Many researches are being conducted to design novel architecture to build efficient networks-on-chips. Our paper proposes efficient bufferless design with deflection containment technique to eliminate buffers and latency. The high cost of buffers motivate us to go for bufferless design, however with increasing network loads, it become notorious with multiple deflection and flit loss between nodes. To overcome this, we have designed a bufferless architecture with local bypass ring within nodes to reduce deflection and packet loss. Deflection Containment with the use of local bypass ring shortens critical path and improves performance. Architecture of our designed bufferless NoC is analysed and RTL implementation of its components is done with Xillinx ISE design suite and its working is analysed in Modelsim SE. Our evaluation proves that bufferless routing with deflection containment technique reduces power dissipation without compromising on its performance.