RealTimeLinux

http://ccrma.stanford.edu/planetccrma/software/

http://lwn.net/Articles/572740/

https://osadl.org/Realtime-Preempt-Kernel.kernel-rt.0.html

https://rt.wiki.kernel.org/index.php/Main_Page

http://www.raspberrypi.org/phpBB3/viewtopic.php?f=63&t=2376