Corba-based Real-time Scheduling Technology Research

Middleware (e.g. CORBA) provides the ability of interoperability among heterogeneous entities in the distributed systems. With the rapid progress of network and computer technologies, more and more importance is being attached upon the performance-related requirements of the distributed system: Real-time performance. It's been hot topic to study on RT-CORBA, and the dynamic scheduling service of RT-CORBA is one of its new study sides, there's few research on this field at home or overseas, so, it must be an inaugurating study.For this, this thesis does some research on the RT-CORBA Dynamic Scheduling Service from theoretical and practical point of view.At beginning, CORBA specification and its' contribution in applications are described, putting emphasis upon Real-Time scheduling technology in Real-Time system and dynamic scheduling service of RT-CORBA.Upon this, According to the dynamic scheduling specification of RT-CORBA, this paper brings forword a dynamic scheduling service frame, this project brings up a modularization idea, it has two key modules: scheduling module and dispatching module.Finally, a performance test has been made. As a result, this dynamic scheduling service framework is capable enough to meet the prearranged goal, and acting perfectly; under the same test condition, for high prior task, the latency of the RT-CORBA which integrated with dynamic scheduling service is less than that which integrated with no dynamic scheduling service, so, this sysem's Real-Time performance has been enhanced.