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CATBR-Congestion Aware Traffic Bridging Routing among hierarchical networks-on-chip

机译：CATBRERION在片上网络中的交通桥接路由

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摘要

In order to ease the communication cost, application tasks are always distributed to nearby nodes in NoC-enabled SoCs, which result in concentrated area of traffic and power distribution. To utilize the intellectual properties on a single chip, and at the meantime, to reduce the high latency due to the long routing hops in large scale on-chip networks, hierarchy has been adopted to provide more attractive solutions to eliminate the performance degradation. Therefore, application tasks are more freely assigned to distant nodes with less communication cost. However, high competition of hierarchical channels along with the hierarchical levels, brings about traffic distribution challenge among the hierarchy, which greatly impacts the network saturation and overall performance. In this paper, we propose an expandable routing Congestion Aware Traffic Bridging Routing(CATBR) strategy to alleviate the potential severe congestion in hierarchical NoCs. By dividing the network into virtual regions, the region header node (bridge node) makes the decision of whether to route a packet to higher levels or not. The simulation results proved that the congestion is easy to form in the bridging up-links, while the bridging down-links has less effect on the network performance. Through the traffic bridging routing on up-links, the network achieves better link utilization and the network throughput is guaranteed.
机译：为了缓解通信成本，应用任务总是分配给邻近节点中启用了NOC-SoC中，这会导致流量和配电的集中区域。为了利用一个单一的芯片上的知识产权，并在此期间，以减少高延迟，由于片上网络，层次已经通过提供更具吸引力的解决方案，以消除性能退化大规模长期路由跳数。因此，应用程序任务被更自由地分配给远距离节点以较少的通信成本。然而，分层级沿层次渠道的高度竞争，带来层次间的流量分配的挑战，这极大地影响了网络的饱和度和整体性能。在本文中，我们提出了一个可扩展的路由拥塞感知的流量路由桥接（CATBR）的策略，以缓解分层片上网络的潜在严重堵塞。通过将网络划分为虚拟区域，该区域标头节点（网桥节点）使是否将分组路由到更高的水平或不决定。仿真结果表明，拥挤很容易在桥接上行链路的形式，而桥接下行链路对网络性能的影响较小。通过交通衔接上了链路路由，网络达到更好的链路利用率和吞吐量保证了网络。

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