Xen中VCPU调度算法分析  

Research on schedulers of virtual CPU in Xen

作　　者：时光[1] 郭玉东[1] 王晓睿[1] 李勇[1] 

机构地区：[1]信息工程大学信息工程学院,河南郑州450002

出　　处：《计算机工程与设计》2010年第18期4116-4119,4123,共5页Computer Engineering and Design

摘　　要：为了降低虚拟化环境中虚拟机的性能开销,提高虚拟化实施效率,在综合考虑虚拟处理器在虚拟机调度过程中的需求的基础上,对Xen中基于信用度的调度算法进行了分析,该算法在处理器密集型应用、多处理器调度和QoS控制方面具有明显的优势。针对目前调度算法在多处理器和新型虚拟机监控器结构下存在的性能问题,提出了自旋锁优先和处理器绑定等优化措施。实例表明,该措施能够提高虚拟处理器的调度效率。To reduce the performance costs of the virtual machine in virtualized environment and improve the efficiency of virtualization implementation, the algorithm of credit-based scheduler in Xen is analyzed. The algorithm has obvious advantages in processor-intensive application, multi-processor scheduling and QoS control. But the current scheduling algorithms have shortcomings in deal with multi- processor and the new framework ofvirtual machine. The optimization methods such as processor fixed and spin locks priority is proposed to solve these performance problems. These optimization methods can effective improve the virtual CPU scheduling efficiency.

关 键 词：虚拟处理器 虚拟机 调度 简单最小时限调度 信用度 

分 类 号：TP311.11[自动化与计算机技术—计算机软件与理论]