A Rely-Guarantee Specification of Mixed-Criticality Scheduling

12/02/2020

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by   Cliff B. Jones, et al.

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The application considered is mixed-criticality scheduling. The core formal approaches used are Rely-Guarantee conditions and the Timeband framework; these are applied to give a layered description of job scheduling which includes resilience to jobs overrunning their expected execution time. A novel formal modelling idea is proposed to handle the relationship between actual time and its approximation in hardware clocks.