零拷贝技术在网络行为分析系统中的应用与改进  

Application and improvement of zero-copy technique in network behavior analysis system

作　　者：顾鹏[1] 汪敏[1] 卢旌平[1] 

机构地区：[1]上海大学通信与信息工程学院,上海200072

出　　处：《计算机工程与设计》2010年第7期1462-1464,1468,共4页Computer Engineering and Design

基　　金：上海市科委重点攻关基金项目(075115004);上海市重点学科建设基金项目(T0102)

摘　　要：为了适应高速网络环境对网络行为分析系统提出的高吞吐量、低时延的要求,并提高系统处理高速数据流的实时性,提出了一种改进型的零拷贝技术。在网络行为分析系统的设计中可在使用DMA和内存映射的基础上应用零拷贝技术,并根据系统的需求对零拷贝技术做出优化,使用专用内存区域来存储网络数据包,并修改Linux操作系统对网络数据包的分配和释放方式。测试结果表明,使用改进后的零拷贝技术的系统吞吐量有明显的提高。High speed network nowadays which works in gigabit requests network behavior analysis system performance in high through-put and low latency,to meet these requests,an improved zero-copy technique is presented.During the development time,network behavior analysis system not only apply zero-copy technique on the basis of DMA and memory map,but also make some suitable modi-fications in zero-copy according to the requests from system.These modifications include using private memory region to storage network packets,modifying the modes of Linux operation system to allocate and free the memory of network packets.Experimental result shows that the throughput of system is improved significantly using the modified zero-copy technique.

关 键 词：千兆 网络行为分析系统 LINUX 零拷贝 吞吐量 

分 类 号：TP316[自动化与计算机技术—计算机软件与理论]