Schedulability analysis for desktop multimedia applications: simple ways to handle general-purpose operating systems and open environments

Erik Cota-Robles, J. P. Held, Thomas J. Barnes
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引用次数: 3

Abstract

Unlike traditional real-time applications, multimedia applications are commonly deployed on top of general-purpose operating systems in open environments. Because Rate Monotonic Analysis (RMA) assumes that the total system workload is known in advance and uses worst case values for operating system overhead (e.g., context switch time), it has not been usable for personal computer and workstation based multimedia applications. We extend RMA to model systems where these OS services have highly non-deterministic timing behavior and where the total system workload is not specified in advance. We validate our techniques by modeling a video telephony application based on Intel's ProShare(R) technology.
桌面多媒体应用程序的可调度性分析:处理通用操作系统和开放环境的简单方法
与传统的实时应用程序不同,多媒体应用程序通常部署在开放环境中的通用操作系统之上。由于速率单调分析(Rate Monotonic Analysis, RMA)假设系统的总工作负载是事先已知的,并且使用了操作系统开销的最坏情况值(例如,上下文切换时间),因此它不适用于个人计算机和基于工作站的多媒体应用程序。我们将RMA扩展到这些操作系统服务具有高度不确定的定时行为以及未预先指定总系统工作负载的系统。我们通过基于英特尔ProShare(R)技术的视频电话应用程序建模来验证我们的技术。
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