先锋光纤通道交换网通信性能优化的研究与实现  

Research and Implementation of Communication Performance Optimization Based on FC Switch Network

作　　者：郭旭东[1] 冯萍[1] 康继昌[1] 许伟[1] 

机构地区：[1]西北工业大学计算机学院,陕西西安710072

出　　处：《计算机测量与控制》2009年第1期135-137,239,共4页Computer Measurement &Control

基　　金：国家"863"计划资助项目(2003AA001018)

摘　　要：原先锋交换网每传送1帧(2KB)数据,发送方和接收方都分别要启动1次DMA,1M字节的数据需要发送方和接收方都启动512次DMA,启动1次DMA花费的时间几乎占了消息在网络上传送时间的一半;针对这个问题,分析了每次DMA的消息块长度与通信速率的关系,提出并实现了"大缓存方案";在网卡上采用大容量存储器作为缓存,发送方还可不等待接收方是否准备好,就发送数据,接收方网卡自动接收数据,传送长度小于1MB的消息时,收发双方各只需进行1次DMA,收发双方网卡自动完成512帧数据的传送;经实验测试,大尺寸消息的传送带宽有了很大提高。Once initialization of DMA is needed every frame data to transfer in existed network. It is almost half the time to spent in net- work. Aimed at the problem, the communication process was analyzed, and in order to gain higher communication performance the whole software and hardware view was taken. Based on the main idea of reducing the DMA time cost, increasing the utilization ration of fiber channel and lower software complexity, the ＂Big Buffer in NIC Program＂ is proposed and implemented. The test result shows that the program can with a certain extent reduce the latency in communication, and improve the band, esoeciallv when message is very long.

关 键 词：光纤通道 高速通信 通信协议 通信优化 

分 类 号：TN915[电子电信—通信与信息系统]