On Fri, Aug 22, 2014 at 9:41 AM, <[log in to unmask]> wrote: > Does it really make difference in timing control comparing to non-realtime > kernel? Thanks. Whether or not you need a RTOS depends on your specific needs. Since you're working with LabVIEW, I would check out their white paper on the subject. http://www.ni.com/white-paper/14238/en/ > I don't have NI's realtime system but I am looking for a free linux OS which > supports realtime kernel. So I wonder does anyone have experience in > this on scientific linux? Does it support realtime kernel? NI Linux Real-Time is based off of the PREEMPT_RT patch set which you can find on the kernel.org Wiki. https://rt.wiki.kernel.org/index.php/CONFIG_PREEMPT_RT_Patch I've never compiled an EL kernel with the patch, but there is no reason why it should not be possible. Brandon Vincent