光纤通道仲裁环实时性能分析

摘要

光纤通道仲裁环(FC-AL)是光纤通道的基本拓扑结构之一.确保消息的实时传输是衡量系统实时性能的关键指标,网络带宽在节点间的合理分配是保证消息实时传输的重要原因.为了保证仲裁环在强实时环境下的应用,分析比较目前存在的一些带宽分配方法,最后验证了选择合适的带宽分配方法对提高仲裁环的实时性能起着关键作用.%Arbitrated loop is one of basic fibre channel topology. The allocation of bandwidth among the nodes is important to guarantee the real-time message transmitting, which is critical for real-time systems. To extent FC-AL to support the hard real-time application such as avionics environment, some schemes of bandwidth allocation applied in data bus technology are compared in this paper, and a right scheme is proved,which can improve the real-time performance hugely.