My experience (sorry 2.0.37, HZ=1000) is that mlocked processes running with
RT priority can miss the deadline by more than 50 ms. Especially core dumps
of big programs are a disaster.
Try "dd if=/dev/zero of=aaa bs=10x1024k count=10"
For any hard real time only RT-Linux gives the guarantee. I think that
performance of many drivers would improve if microsecond resolution timers
with jitter typical 5 us, max 30 us would be available in the kernel.
ftp://fsmlabs.com/pub/rtlinux/
http://www.rtlinux.org/~rtlinux/
ftp://www.aero.polimi.it/RTAI/
http://www.aero.polimi.it/projects/rtai/
-- Tomek
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/