摘要： 针对全虚拟化下客户端虚拟机无法“感知”虚拟机监视器的问题，对基于Xen的I/O准虚拟化驱动进行研究，通过实验可知，准虚拟化驱动能够消除全虚拟化方式下虚拟机监视器“黑箱”特性的限制，可以实现和虚拟机监视器的密切配合，从而提高I/O性能。在虚拟机Xen的全虚拟化环境中加入准虚拟化驱动，采用对比测试方法验证了该驱动能大幅提升网络性能。

关键词: I/O虚拟化, 准虚拟化驱动, Xen虚拟机

Abstract: Aiming at the problem that client Virtual Machine(VM) can not identify Virtual Machine Monitor(VMM) in full virtualization, I/O para-virtualization driver based on Xen is researched. Experiments are conducted, and some results show the facts that, Para-Virtualization Driver(PV Driver) can eliminate the limitation of “black box” character for VMM, and implement cooperation with VMM, which promotes the I/O performance. It is added into full virtualization environment for Xen VM. Comparing test method is used to demonstrate it can improve network performance.

Key words: I/O virtualization, Para-Virtualization Driver(PV Driver), Xen Virtual Machine(VM)

中图分类号: 

• N945