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6.3 Real-Time Linux and Its Application Programming Interface

Real-time operating systems!Real-Time Linux

In 2006, Linus TorvaldsTorvalds Linus, the creator and maintainer of the Linux kernel, famously said of the idea of using the Linux kernel for real-time computing:

Controlling a laser with Linux is crazy, but everyone in this room is crazy in his own way. So if you want to use Linux to control an industrial welding laser, I have no problem with your using PREEMPT_RT. Gleixner (2010)

PREEMPT_RT

The PREEMPT_RT patch, the key to the Real-Time Linux project Foundation (2022), hardens the real-time performance of the main Linux kernel, which was not developed with real-time applications in mind. Since 2019, aspects of the PREEMPT_RT patch have been accepted to the Linux kernel Foundation (2022). The development of the project has been partly supported by industry stakeholders …

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