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Much of the research on scheduling schemes is prevented from being used in practice by the lack of implementations that provide the necessary abstractions. An example of this is the support of execution-time servers. Apart for a single mechanism (the sporadic server), which is defined in the POSIX standard, these important building blocks are not available to the system developer. Over the last few...
This paper analyses the performance of an Attitude and Orbital Control System for the Olympus Satellite. The system was designed using HRT-HOOD and implemented in Ada 83 augmented with some of the facilities of Ada 9X. The program consisted of multiple tasks communicating via protected shared data areas. A worst-case execution time analysis tool was used to estimate the execution time of each task,...
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