摘要
I/O密集型虚拟机需要频繁地进行域间通信,为解决现有虚拟机域间通信效率低、延迟大的问题,提出一种基于双环形缓冲区的用户域与驱动域域间通信优化方法。在用户域中建立与驱动域共享的双环形缓冲区,由虚拟机监控器依据I/O任务表对驱动域的访问权限进行控制,减少处理器模式切换和内存映射开销。实验结果表明,与原虚拟机域间通信机制相比,使用该优化方法后的域间通信机制具有更高的吞吐率和更低的延迟,大幅提高了用户域与驱动域的域间通信性能。
The virtual machines which are I/O intensive need to communicate with each other frequently.In order to solve the problems of low efficiency and big latency in inter-domain communication of virtual machines,an inter-domain communiaction optimization method between driver domain and user domain based on Double Ring Buffer （DRB） is proposed.Two ring buffers in user domain are built to be shared with a driver domain,and the access rights of the driver domain is controlled by the virtual machines monitor according to I/O task tables,which reduces the overhead of processor mode switching and memory mapping.Experimental results show that the inter-domain communication mechanism after using the optimization method has higher throughput and lower delay compared with original interdomain virtual machine communication mechanism,and it greatly improves the inter-domain communication performance of the user domain and drive domain.
出处
《计算机工程》
CAS
CSCD
北大核心
2017年第1期1-7,共7页
Computer Engineering
基金
国家"973"计划项目(2011CB311801)
