The Digraph Real-Time Task Model

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Provided by: Uppror Media Group
Topic: Hardware
Format: PDF
Models for real-time systems have to balance the inherently contradicting goals of expressiveness and analysis efficiency. Current, task models with tractable feasibility tests have limited expressiveness, restricting their ability to model many systems accurately. In particular, they are all recurrent, preventing the modeling of structures like mode switches, local loops, etc. In this paper, the authors advance the state-of-the-art with a model that is free from these constraints. Their proposed task model is based on arbitrary directed graphs (digraphs) for job releases. They show that the feasibility problem on preemptive uniprocessors for their model remains tractable.
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