Search

Selection strategy is an essential part of an adaptive routing algorithm that influences the performance of the networks‐on‐chip (NoC). A selection strategy is used for selecting the best output channel from the available channels according to the network status. This study presents a new output selection strategy called destination intensity and congestion aware (DICA) that uses both local and regional congestion information from adjacent and two hops away neighbours on the path to destination based on the channel and switch information. Also, the proposed output selection strategy uses a new global congestion‐aware scheme based on destination node called destination congestion awareness method to distribute traffic more equally over the network. The simulation results show that DICA strategy consistently improves the performance in both throughput and average latency with minimal overhead in terms of area consumption for various synthetic and real application traffic patterns. In addition, the microarchitecture of NoC routers is also presented in this study and it shows that the proposed output selection strategy can be combined with any adaptive routing algorithms. The experimental results show the average delay improvements of DICA to the Bufferlevel, neighbours‐on‐path, and regional congestion awareness are 87, 57, and 24%, respectively. [ABSTRACT FROM AUTHOR]

In the movement from a multi‐core to a many‐core era, cores count on the chip increases quickly thus interconnect plays a large role in achieving the desired performance. Network‐on‐chip (NoC) is the most widely used interconnect as a scalable alternative for traditional shared bus in many‐core chips. As the dimensions of mesh‐based NoC increase, routers and links serve as a major part to achieve the desired performance and low‐latency communication between cores. In this study, the authors propose an arbitration mechanism for NoC that leads to a reduction in congestion delay in routers as well as the network latency. The proposed mechanism is compatible with the bypass and baseline pipeline in routers. System simulations with Noxim demonstrate reduction in latencies and power consumption using different routing algorithms for 4×4,8×8 and 16×16 mesh topologies, as compared with a baseline router. [ABSTRACT FROM AUTHOR]

Network‐on‐chip (NoC) performance largely depends on the underlying deadlock‐free and efficient routing algorithm. The effectiveness of any adaptive routing algorithm strongly depends on the underlying selection strategy. When the routing function returns a set of admissible output channels with cardinality greater than one, a selection function is used to select the output channel to which the packet will be forwarded. In this study a novel selection strategy, LATEX, is proposed that can be used with any adaptive routing algorithm for specified applications. The objective of the proposed selection strategy is to efficiently balance traffic load and reach better performance results. Performance evaluation is carried out by using a flit‐accurate simulator under two real traffic scenarios. Result experiments show that the proposed selection strategy applied to several routing algorithms significantly improves average delay, max delay and power consumption. [ABSTRACT FROM AUTHOR]