Resource Management Middleware for Dynamic, DependableReal-Time Systems

Abstract

This paper presents resource management techniques that achieve the quality of service (QoS) requirements of dynamic real-time systems using open architectures and commercial off-the-shelf technologies (COTS). Dynamic real-time systems are subject to constant changes such as a varying external environment, overload of internal systems, component failure, and evolving operational requirements. Examples of such systems include the emerging generation of computer-based, command and control systems of the U.S. Navy. To enable the engineering of such systems, we present adaptive resource management middleware techniques that achieve the QoS requirements of the system. The middleware performs QoS monitoring and failure detection, QoS diagnosis, and reallocation of resources to adapt the system to achieve acceptable levels of QoS. Experimental characterizations of the middleware using a real-time benchmark illustrate its effectiveness for adapting the system for achieving the desired real-time and survivability QoS during overload situations.