Another simple question about LXRT

[Paolo Mantegazza]

Stefan Frank wrote:
> Thanks for the answer.
> 
> Actually I'm not interested in the figures and numbers, but the theoretic 
> aspect of LXRT. Is the LXRT task in the RTAI domain handled like a task from 
> a RTAI kernel module? If it doesn't leave the the hard-realtime mode?
> 

YES!

Notice that in kernel you can have 2 kind of tasks, RTAI-proper and 
Linux kernel threads, all working in hard real time. The choice is is 
the sceduler you use:
-rtai_lxrt: user space hardened Linux user space tasks and kernel threads
- rtai_ksched: user space hardened Linux processes and kernel threads + 
RTAI proper tasks, all available as you like.

Naturally it is possible to use RTAI is soft mode in any Linux user 
space task and kernel threads, also. I've found it easies a lot writing 
standard kernel drivers with a supporting bottom half kthread, as it 
allows to crap you right hear using your right hand.

Paolo.