支持QoS的操作系统框架的研究

视频会议、VOD、数字图书馆等实时多媒体应用要求计算机系统的资源管理者-操作系统必须支持QoS。该文提出了一种支持QoS的操作系统框架,该框架包括了资源的静态管理和动态管理策略,支持QoS需求到资源需求的转换、映射,支持允许控制、资源预留、动态调度与维护机制。文章对支持QoS所需的几个关键子系统进行了深入的研究,包括满足QoS需求的CPU调度算法、存储管理策略、磁盘I/O调度方法和网络接口的控制。

Research on Operating System Framework to Support QoS

Supporting Quality of Service(QoS)requirements for multimedia applications such as VOD,video conference and digital library places significant demands on Operating Systems as a resource manager for managing end system resources.A operating system framework supporting QoS is presented in this paper,which includes policies for static and dynamic resource management and supports QoS translation,admission control,resource reservation and maintainence.The key issues involved in various subsystems (CPU scheduler,Memory,Network Interface,Disk I /O)towards meeting these QoS requirements are discussed in detail.The approriate method and implementation for the subsystems are developed.