The two scheduling algorithms released by Xen4. 1 neither get good performance in multitask virtualization on server. After analyzing the characteristic and requirements of three types of tasks running on virtual machines,optimization methods were proposed: sorting I/O tasks by consumed time,preferably scheduling I/O task of less consumed time,recording computing-mode task associated with the cache to maintain cache consistency. Thereby we improved the cache efficiency on the basis of ensuring the I/O response and bandwidth performance.%Xen4.1发布的两个调度算法,都无法在服务器多任务虚拟化时得到好的性能.首先分析虚拟机上运行的3种任务的特点及要求,然后提出优化方法:将I/O任务按已消耗时间排序,优先调度消耗时间少的I/O任务,并记录缓存关联计算型任务,以保持运行时缓存的一致性,最终在保证I/O响应和带宽性能的基础上显著提高了缓存性能.
展开▼
