Improvement of the Interactive Performance Isolation of Virtual Machines on Xen Platform

分析了高整合程度环境下,虚拟机出现连续性网络延迟峰值的异常现象,设计并实现了针对交互式性能隔离的虚拟机调度算法优化方案,包括协作式抢占、抢占返回和精确核算机制, 这些优化方案不需要对客户操作系统做任何修改.实验表明,在8台CPU密集型虚拟机同时运行的情况下,另外8台虚拟机网络延迟的最高5%平均值降低至优化前的0.93%,Firefox浏览邮件延迟的最高5%平均值降低至优化前的56.1%.The authors address the problem that in a highly-consolidated environment, there are continuous peaks of network latency of guest OS. Three optimizations of VM scheduler are designed and implemented to improve interactive performance isolation, including cooperative preemption, preempt-back and accurate accounting. None of these optimizations needs guest OS to be modified. The evaluation results show that with 8 computing-intensive VMs running concurrently, the average of top 5% network latency of other 8 VMs is reduced to as mush as 0.93% of the original one, and the one of web-mail browsing by Firefox is reduced to 56.1%.国家高技术研究发展计划(863计划)中文核心期刊要目总览(PKU)中国科技核心期刊(ISTIC)中国科学引文数据库(CSCD)0141-474