期刊
IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS
卷 6, 期 4, 页码 621-636出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TII.2010.2053938
关键词
Design space exploration; distributed system; extensibility; platform-based design; real-time
We consider a set of control tasks that must be executed on distributed platforms so that end-to-end latencies are within deadlines. We investigate how to allocate tasks to nodes, pack signals to messages, allocate messages to buses, and assign priorities to tasks and messages, so that the design is extensible and robust with respect to changes in task requirements. We adopt a notion of extensibility metric that measures how much the execution times of tasks can be increased without violating end-to-end deadlines. We optimize the task and message design with respect to this metric by adopting a mathematical programming front-end followed by postprocessing heuristics. The proposed algorithm as applied to industrial strength test cases shows its effectiveness in optimizing extensibility and a marked improvement in running time with respect to an approach based on randomized optimization.
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