Re: Real time kernel

[Dragoslav Zaric <dragoslav.zaric.kd@gmail.com>]

This is definition from http://rt.wiki.kernel.org/

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Real-time applications have operational deadlines between some
triggering event and the application's response to that event. To meet
these operational deadlines, programmers use real-time operating
systems (RTOS) on which the maximum response time can be calculated or
measured reliably for the given application and environment.
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So for specific requirements I would not say, you get slower kernel,
you get purpose-making kernel, because on these kind of systems you
probably do not do anything. It is probably the system that listens
and responds to some events.

Do you want to say, when using preemption in "normal user mode", Linux
works slower then without preemption ?
It makes sense,

"because the latency of a task only depends on the tasks running at
equal or higher priorities, all other tasks can be ignored."
(http://rt.wiki.kernel.org/index.php/Frequently_Asked_Questions#What_is_real-time.3F)

Thanks