半虚拟化I/O模型的KVM虚拟机域间通信优化方法  

Optimization for Inter-VMs Communication on KVM with Para-Virtualized I/O Model

作　　者：丁圣阁[1] 马汝辉[2] 梁阿磊[1] 管海兵[2] 

机构地区：[1]上海交通大学软件学院,上海200001 [2]上海交通大学计算机科学与工程系,上海200001

出　　处：《计算机科学与探索》2011年第12期1114-1120,共7页Journal of Frontiers of Computer Science and Technology

基　　金：国家自然科学基金No.60970108;60970107~~

摘　　要：提出了一种半虚拟化网络模型来优化虚拟机域间通信的性能,通过共享内存建立通信通道来打破虚拟机之前的隔离屏障,减少在数据传输过程中的拷贝次数。基于内核虚拟机(kernel-based virtual machine,KVM)半虚拟化框架编程接口的实现方法可以简化设备I/O的模拟,减少特权指令模拟所需的根-非根模式的切换,提供高效的I/O模拟,并向客户提供标准的网络接口,使通信通道透明。利用共享内存的通信方法,其性能接近进程间通信。对系统原型进行测试,结果表明域间通信的吞吐量和响应延时都得到了较好的优化。This paper presents a para-virtualized network model to optimize inter-VMs communication performance, which is designed as a shared-memory-based channel crossing barriers to reduce data copies in virtualization sys- tems. The implementation of kernel-based virtual machine （KVM） with para-virtualized I/O device emulation can simplify I/O operation and reduce traps which incur switches between root and non-root modes in KVM. It provides an efficient I/O path and this communication channel is transparent to guest applications while the front-end driver has a standard interface for kernel. This method can achieve performance nearly at inter-processes communication level. The test results on prototype show that the throughput and latency of inter-VMs communication are improved.

关 键 词：半虚拟化 域间通信 共享内存 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]