Efficient Virtual Channel Organization and Congestion Avoidance in Multicore NoC Systems

Dynamically Allocated Multi Queues (DAMQ) is an effective mechanism to achieve Virtual Channel (VC) based flow control with maximum buffer utilization in multi-core Network-on-Chip (NoC) systems. We present a new methodology to remedy some of the drawbacks of DAMQ technique. The architectural design of a DAMQ router input-port that uses minimal hardware is introduced. Our input-port design saves 70% of combinational-logic and 14.7% register hardware as compared to conventional Link-List input-port. We also present an efficient mechanism to remove traffic congestion in on-chip communication for NoC systems. It improves latency and throughput by 30% and 23% respectively as compared to conventional dynamic Virtual Channel design.