Sashka,
[..]
I've got it build several time. I'm confused with all those different
guides telling me what to enable and disable. Most of them are
outdated, as I can see.
The usual recommendation is:
1. Get the config of your distro
# cd /usr/src/kernels/linux-3.0.7-rt20
# cp /boot/config-`uname -r` .config
2. Configure the kernel for RT
# make menuconfig
Processor type and features --->
[ ] Tickless System (Dynamic Ticks)
Preemption Model (Fully Preemptible Kernel (RT)) --->
Kernel hacking --->
[ ] Check for stack overflows
To check out the new kernel for its RT capabilities:
# cd /usr/src
# git clone https://github.com/clrkwllms/rt-tests
# cd rt-tests
# make rpm
# rpm -ivh RPMS/*/rt-tests*.rpm
# cyclictest -m -Sp99 -i100 -d0
Let us know what worst-case latency you got.
-Carsten.
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