Abstract: Full virtualization is vastly applied in desktop virtualization. Although hardware-assisted virtualization greatly improves the performance, the interactive performance is still a bottleneck for full virtualization. Interactive performance is mainly influenced by I/O devices. In one hand, I/O devices are slow device. In another hand, they are often shared by multiple virtual machines through simulation. This paper improves the interactive performance of full virtualization. Firstly, it investigates virtual machine deployment to ensure stable performance of the whole system and individual virtual machine. Secondly, it dynamically adjusts the resource among virtual machines based on the interactive behavior of individual machine. Thirdly, it optimizes the I/O request scheduler in term of the virtualization implementation. Finally, the experimental results prove the validity of the improved method.

Key words: multi-core, desktop virtualization, interactive performance, I/O feature, coordinated scheduling

摘要： 硬件辅助虚拟化的提出，极大地提高了全虚拟化的性能。但是全虚拟化下类似网络教室等桌面虚拟化应用，在交互式性能方面还存在较大局限。交互式性能主要受I/O性能的影响：一方面I/O设备属于慢速设备；另一方面全虚拟化中采用模拟方式来共享设备。对全虚拟化的交互式性能进行了改进，充分利用多核处理器的物理特征来部署配置虚拟机，根据用户行为动态调整虚拟机的使用资源，依据虚拟化特征进行I/O调度的优化。最后，通过评测实验证明了改进方案的有效性。

关键词: 多核, 桌面虚拟化, 交互式性能, I/O特征, 调度协同