The purpose of benchmarking systems is most commonly to alow judgment if a system configuration is suitable for a given RT-spec. Aside from the fact that these RT-specs are most often quite vague, the problem of benchmarking is not well resolved in the currently available hard real-time solutions for Linux.

As a guidance to many of the findings presented here we have adopted the following theme:

Celestial navigation is based on the premise that the Earth is the center of the universe. The premise is wrong, but the navigation works. An incorrect model can be a useful tool.

The issue thus is to validate the models on practical code and not drop to deeply into a theoretical view. In this article we summarize our experience with benchmarking RTLinux and with some partially paradox optimization strategies that we have derived from benchmark results.

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