交换结构中的可重构缓存机制

Reconfigurable buffer mechanism in switch fabric design

大量研究集中在路由器对缓存区容量设置的理论需求上,可重构缓存则借助可重构系统按需分配的思想,试图从实现机制上提高缓存利用率以改善系统性能。现有固定缓存的交换结构,在大量缓存区空闲时仍可能有某些端口因较大突发流量而大量分组丢失。为此引入缓存的重构机制,打破端口对缓存单元的私有独占,按各端口的实际缓存需求量来实时重构,分析和实验结果表明,运用该机制可有效解决缓存资源浪费现象,在获得同等抗突发性能的条件下,节约大量存储单元,大大提高路由器交换系统中存储单元的利用率。

Current research focused on the theoretic buffer size of routers. The reconfigurable buffer tried to improve the buffer utilization rate to optimize the system performance based on the on-demand design of the reconfigurable system. In fact, for current switching fabrics with fixed buffers,.cell loss under burst traffics still could not be resolved at some ports despite abundant buffers were free. The reconfiguration mechanism was introduced into buffers, which broke the private occupancy of buffers by single ports and reconfigured buffers due to the real-time requirements of per port. Analysis and simulation results show that the reconfiguration mechanism could resolve the problem of resource con- sumption effectively, and improve the ultilization of buffers as well as save buffers with the same anti-burst performance.