A resource synchronization protocol for dynamic scheduling real-time CORBA

In 1989, the Object Management Group (OMG) formed a Real-Time Special Interest Group (RT SIG) with the goal of extending the Common Object Request Broker Architecture (CORBA) standard with real-time specifications. The most recent effort attempts to meet the requirements of dynamic distributed real-time systems. In such systems, one of the requirements is resource access synchronization for tasks with end-to-end timing constraints under dynamic scheduling. The paper proposes a resource synchronization protocol that meets the requirements of the dynamic distributed realtime system specified by the Dynamic Scheduling Real-Time CORBA (DSRT CORBA). The proposed protocol can be applied to both Earliest Deadline First (EDF) and Least Laxity First (LLF) dynamic scheduling algorithms, allows distributed nested critical sections, and avoids unnecessary runtime overhead