A Performance M o d e l F o r Real- Time Systems John R. Newport, Ph.D. Naval Air Warfare Center, Aircraft Division, Indianapolis I. P R O B L E M STATEMENT H o w f a s t will this application run on the n e w system? This may be the most unwieldy for performance estimation o f normal service requests in such systems. This complexity can force analysts to rely on phenomenological models based on benchmarks. Although the proverbial silver bullet may lie beyond the extinction point o f a rainbow, analysts in the last decade have made much progress in developing a set o f tests that allow soRware designers to predict the behavior o f many types o f applications. In the 1980s, a library o f assembly language tests became the nostrum o f performance .analysts. Many o f these were later receded into Ada and became part o f the Association for Computing Machinery Performance Issues Working Group (PIWG) suite. 2 The PINVG tests are quite useful at probing the functionality o f a new design, but an extrapolation to the requirements o f a real-time, embedded control application can
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