Scheduling and prototyping of distributed real-time systems (an approach using JINI/JAVASPACES)
MetadataShow full item record
Scheduling is one of the basic issues in building real-time applications on a distributed computing system. A distributed computing system is typically modeled as a collection of processes interconnected by a communication network. For real-time applications, scheduling is needed to meet applications timing constraints. The major difference between single processor and distributed processors scheduling is that, in addition to deciding which order to execute tasks, distributed processors' scheduling algorithms must also decide which processors the task should run on. Moreover, these algorithms must also take into consideration practical network issues like transmission delay, loss of messages, and synchronization in the absence of a global clock. This thesis proposes a formal model to capture these network constraints and develops a proxy-based network buffer technique to support the inter-process communication for the user-defined distributed real-time systems prototypes generated by the Distributed Computer Aided Prototyping System (DCAPS). The proxy-based technique builds on the Jini/JavaSpaces infrastructure. We have conducted several experiments to measure the response time of inter-process communication via JavaSpaces. We have demonstrated the effectiveness of the proxy-based technique by creating an executable prototype of a user-defined distributed real-time system specification.
RightsCopyright is reserved by the copyright owner
Showing items related by title, author, creator and subject.
Software architecture for distributed real-time embedded systems Almeida, Jose Carlos Alves de. (Monterey, California. Naval Postgraduate School, 1998-09);Real time embedded systems have particularly strict requirements on accuracy, safety and reliability. A central question in the design of such systems is how to support concurrent processing without adversely affecting the ...
Dynamic Segment Scheduling in JMCIS Ambrosius, Stephen L.; Byram, Judith K.; Campbell, Mark; Freund, Richard F.; Kidd, Taylor; Klich, David; Kramer, G. Fred; Weissman, Marc; Wellington, Robert J. (Center for Advanced Concepts and Technology, 1996-06);This paper summarizes the results of an investigation made into the use of SmartNet, a global distributed computing environment scheduling tool, with the Joint Maritime Command Information System (JMCIS). It was found that ...
The effects of security choices and limits in a metacomputing environment Irvine, Cynthia E.; Levin, Timothy E. (Monterey, California. Naval Postgraduate School, 2000); NPS-CS-00-004It is anticipated that the introduction of metacomputing and distributed resource management mechanisms to the Internet and World Wide Web will make available to users and applications a large diversity of previously ...