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首页> 外文期刊>Journal of systems and software >Period sensitivity analysis and D-P domain feasibility region in dynamic priority systems
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Period sensitivity analysis and D-P domain feasibility region in dynamic priority systems

机译：动态优先级系统中的周期敏感性分析和D-P域可行性区域

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摘要

In the design of a real-time application it is fundamental to know how a change in the task parameters would affect the feasibility of the system. Relaxing the classical assumptions on static task sets with fixed periods and deadlines can give higher resource utilisation and better performance. But the changes on task parameters have to be done always maintaining feasibility. In practice, period and deadline modifications are only necessary on single tasks. Our work focuses on finding the feasibility region of deadlines and periods (called D-P feasibility region) for a single task in the context of dynamic, uniprocessor scheduling of hard real-time systems. This way, designers can choose the optimal deadline and period pairs that best fit application requirements. We provide an exact and an approximated algorithm to calculate this region. We will show that the approximated solution is very close to the exact one and it takes considerably less time.
机译：在实时应用程序的设计中，了解任务参数的更改将如何影响系统的可行性至关重要。放宽对具有固定期限和期限的静态任务集的经典假设，可以提高资源利用率和性能。但是必须始终保持可行性对任务参数进行更改。实际上，仅在单个任务上需要修改期限和截止日期。我们的工作重点是在硬实时系统的动态，单处理器调度中找到单个任务的期限和期限的可行性区域（称为D-P可行性区域）。这样，设计人员可以选择最适合应用程序需求的最佳期限和周期对。我们提供了精确和近似的算法来计算该区域。我们将证明近似解与精确解非常接近，并且花费的时间要少得多。

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