I did some tests with the linux-stable 3.12.6 kernel with the rt9 patch on a beagleboard.
Finally I did some latency tests which shew some strange results.
Testing with cylictest from the rt-tests I get an average latency at about 65us.
But max latency is about 4!
I am very interested if anybody got an 3.12-rt system up and running at much better
do you still work with Kernel 3.12 and PREEMPT_RT ?
The question is, how you built the Kernel,
because I’m not shure how to inject the PREEMPT - Patch into Robert Nelson Kernel https://github.com/RobertCNelson/stable-kernel/tree/v3.1.x
if it is Cross Compile on Ubuntu.
Could it be done by the following lines:
#patch -p1 <[patch-3.12.24-rt37.patch](https://www.kernel.org/pub/linux/kernel/projects/rt/3.12/patch-3.12.24-rt37.patch.gz)
I’m not shure what happend because there is no PREEMPT option in the following configuration menue
Thank you in advance