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Operating system support for multimedia systems

机译:多媒体系统的操作系统支持

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摘要

Distributed multimedia applications will be an important part of tomorrow's application mix and require appropriate operating system (OS) support. Neither hard real-time solutions nor best-effort solutions are directly well suited for this support. One reason is the co-existence of real-time and best effort requirements in future systems. Anther reason is that the requirements of multimedia applications are not easily predictable, like variable bit rate coded video data and user interactivity. In this article, we present a survey of new developments in OS support for (distributed) multimedia systems, which include: (1) development of new CPU and disk scheduling mechanisms that combine real-time and best effort in integrated solutions; (2) provision of mechanisms to dynamically adapt resource reservations to current needs; (3) establishment of new system abstractions for resource ownership to account more accurate resource consumption; (4) development of new file system structures; (5) introduction of memory management mechanisms that utilize knowledge about application behavior; (6) reduction of major performance bottlenecks, like copy operations in I/O subsystems; and (7) user-level control of resources including communication.
机译:分布式多媒体应用程序将是未来应用程序组合的重要组成部分,并且需要适当的操作系统(OS)支持。硬实时解决方案和尽力而为解决方案都不能很好地适合这种支持。原因之一是未来系统中实时需求和尽力而为需求的共存。另一个原因是多媒体应用的需求不容易预测,例如可变比特率编码的视频数据和用户交互性。在本文中,我们概述了对(分布式)多媒体系统的OS支持的新发展,其中包括:(1)开发新的CPU和磁盘调度机制,将实时和尽力而为的集成解决方案结合在一起; (2)提供机制以使资源预留动态适应当前需求; (3)建立用于资源所有权的新系统抽象,以解决更准确的资源消耗问题; (4)开发新的文件系统结构; (5)引入利用有关应用程序行为知识的内存管理机制; (6)减少主要的性能瓶颈,例如I / O子系统中的复制操作; (7)用户级别的资源控制,包括通信。

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