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The determination of upper bounds of execution time (Worst-Case Execution Time -- WCET) of tasks is an importantstep in the development and validation of safety-critical hard real-time systems. Measurement based methods arenot considered safe and the static code analysis is know to be a difficult problem if the underling processorarchitecture uses cache memories, pipelines and speculative components...
There is a tendency toward the use of personal computers (PC) in real-time systems. These computers have highprocessing capacity and reduced costs when compared to software and hardware development fordedicated platforms. However, real-time systems require latency predictability and the processors of the x86architecture have aspecial protection and correction mode known as SystemManagement Mode (SMM)...
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