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Linux: Embedded Development by Chris Simmonds, Alex González, Alexandru Vaduva

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Benchmarking

The Linux operating system was for a very long time seen as a GPOS, but in the last couple of years, some projects tried to change this by modifying the Linux kernel into a RTOS. One such project is the PREEMPT_RT patch, which was mentioned previously.

In this section of the chapter, I will discuss a series of tests that could be executed for both versions of the Linux OS with or without applying the PREEMPT_RT patches. I should mention that for those of you who are interested in some actual results, there are a number of papers available that try to investigate the latency effect of the PREEMPT_RT or its advantages or disadvantages. One such example is available at http://www.versalogic.com/downloads/whitepapers/real-time_linux_benchmark.pdf ...

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