Implementation of adaptive Mode-Switch-Algorithms in mixed critical Systems

Modern systems nowadays often integrate functionalities of different safety-criticality on the same hardware. Therefore several specialized schedulers have been proposed for these so called mixed-criticality systems, to guarantee all deadlines of high critical jobs, while keeping the quality of service as high as possible. A framework called SF3P was published to effectively simulate and analyze various scheduler set ups suitable for single core processors. However this framework didn’t support mixed-criticality systems. This paper covers the concepts and the implementation of several schedulers, which were designed for mixed-criticality systems and how SF3P has been updated to be able to simulate systems with tasks of multiple criticalities. Additionally the performance of these schedulers will be analyzed in respect to scheduling-overhead and quality of service.