Publication Name Resource Rationalizer: A Pattern Language for Multi-Scale Scheduling  
Publication Type Conference Proceeding  
Publication Date August, 2002  
Bibliography Entry Chris Gill, Douglas Niehaus, Venkita Subramonian, Lisa DiPippo, Victor Fay-Wolfe, Resource Rationalizer: A Pattern Language for Multi-Scale Scheduling, Proceedings of the 9th Conference on Pattern Language of Programs 2002, Monticello, IL, Sept. 2002  
Download Publication downloads/resource_rationalizer.pdf  
Assuring end-to-end timeliness properties in a distributed real-time system poses a variety of challenges at each, of several, levels of abstraction. The challenges vary with levels of abstraction that correspond generally to levels of architectural scale. In particular, there are key differences in the design forces for resource scheduling (1) within the operating system kernel, (2) within the middleware infras-tructure on a single endsystem, and (3) distributed across endsystems in the entire system. While there is signifi-cant commonality related to the system’s end-to-end time-liness requirements, the forces and their resolution vary non-trivially with each level of abstraction. Some design forces are seen at, or even span, multiple levels of scale. We document patterns that offer an organizing approach to design, within which the design forces at and across each level of abstraction can be resolved. This paper describes a pattern language for rationalizing resource scheduling at multiple levels of scale in distributed real-time and embedded systems.
Lisa DiPippo dipippo@cs.uri.edu
Victor Fay-Wolfe wolfe@cs.uri.edu
Patterns for real-time distributed object middleware scheduling

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Department Of Computer Science and Statistics
Univeristy Of Rhode Island