基于Xen的I/O准虚拟化驱动研究

Research on I/O Para-Virtualization Driver Based on Xen

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。

Aiming at the problem that client Virtual Machine（VM） can not identify ViSual 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.