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Virtualization, together with realtime support emerges to be used in an increasing amount of use cases, varying from embedded systems to enterprise computing. One of the most popular opensource virtualization software’s is Xen. Its current implementation does not qualify it to be a candidate for timecritical systems. Researchers and developers extended it and claim the efficient usage of their versions in such systems.
RTXen is one of these versions. It is a virtualization platform based on Compositional Scheduling and uses a suite of fixedpriority schedulers.
This paper evaluates the performance and scheduling behaviour of RTXen. The test results show that only two proposed schedulers are suitable to be used for soft realtime applications.
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