面向用户态Click的I/O优化框架的设计与实现  

Design and Implementation of Optimization I/O Framework for Click Modular Router in User Level

作　　者：刘松[1] 卢泽新[1] 张晓哲[1] 马世聪[1] LIU Song;LU Zexin;ZHANG Xiaozhe;MA Shicong(School of Computer, National University of Defense Technology, Changsha 410073, China)

机构地区：[1]国防科学技术大学计算机学院,长沙410073

出　　处：《计算机科学与探索》2016年第12期1693-1700,共8页Journal of Frontiers of Computer Science and Technology

基　　金：国家重点基础研究发展计划(973计划)No.2012LB315900~~

摘　　要：软件路由器在现代网络的发展中发挥着越来越重要的作用,而Click是具有良好模块化设计的软件路由器,为开发和验证新的路由协议等应用提供了很好的软件平台。由于实现机制问题,用户态Click的I/O性能严重限制报文处理能力,影响以Click软件路由器为平台的系统的整体性能。针对现有Click用户态I/O机制的不足,提出了一种面向用户态Click的I/O优化框架,通过采用轮询技术、零拷贝技术和报文预取技术提升了I/O性能。实验结果表明:优化后的用户态Click的I/O性能提升了121倍。Software router has played a more and more important role in the development of modern networks, and the Click modular router has been one of the most popular software routers as it provides a good platform for new protocol development and rapid prototyping. Due to external overhead introduced by practical mechanism, I/O performance,which has become a bottleneck, strictly prevents the packet processing capability of Click in the user level.Aiming at the shortcomings of the I/O mechanism in the existing Click modular router, this paper proposes an optimized I/O framework for the Click modular router in the user level, through using the poll mode, zero copy and packet prefetching. The experimental results show that the optimized I/O framework can provide better performance (121 times) than the native.

关 键 词：软件路由器 CLICK I/O 轮询 零拷贝 报文预取 

分 类 号：TP393.0[自动化与计算机技术—计算机应用技术]