A software product line describes explicitly the commonalities of and differences between different products in a family of (software) systems. A formalization of these commonalities and differences amounts to reduced development, analysis and maintenance costs in the practice of software engineering. An important feature common to next-generation real-time software systems is the need of application-level control over scheduling for optimized utilization of resources provided by for example many-core and cloud infrastructures. In this paper, we introduce a formal model of real-time software product lines which supports variability in scheduling policies and rigorous and efficient techniques for modular schedulability analysis.
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