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Posts tagged real-time

Necessary and Sufficient Conditions for Non-Preemptive Robustness

A real-time scheduler is robust (sustainable) for a certain task set if its schedulability is preserved under lighter system load by the scheduler. The first part of this paper shows that NPr (non-preemptive) robustness of a zero-concrete periodic task set against increase in period is sufficient to guarantee…

Bounding the Running time of Interrupt and Exception Forwarding in Recursive Virtualization for the x86 Architecture

Virtualization has been a key technology in enhancing interoperability and in making systems more secure. However, the question remains whether virtualization can be used in the context of real-time systems because of efficiency and schedulability issues. This question is even more controversial when recursive virtualization is considered. In…