But see here's where I'm confused. If Linux already provides priorities of tasks: http://www.thegeekstuff.com/2013/08/nice-renice-command-examples/ then the LinuxCNC as a task can run higher than anything else. If the motion/encoder control is offloaded to a device driver, which should have even higher priority then where does the real time kernel of the LinuxCNC fit in? John Dammeyer
> -----Original Message----- > From: Nicklas Karlsson [mailto:nicklas.karlsso...@gmail.com] > Sent: March-16-16 9:42 AM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] Linuxcnc on arm > > > > Real time is not one of the main concerns of the kernel devs. The kernel > > has graphics drivers that interfere with real time as well as X. > > Probably right no one are interested enough. Good real time performance > require proper priority of everything handled from interrupts, I also read > system management interrupts are not possible to get rid of. Knowlegde > about which real time tasks exist within kernel like serial receive buffers > which must be handled before filled up next time or accept lose data is > probably another issue I never even heard anyone mention. > > > Nicklas Karlsson > > ---------------------------------------------------------------------------- -- > Transform Data into Opportunity. > Accelerate data analysis in your applications with > Intel Data Analytics Acceleration Library. > Click to learn more. > http://pubads.g.doubleclick.net/gampad/clk?id=278785231&iu=/4140 > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Transform Data into Opportunity. Accelerate data analysis in your applications with Intel Data Analytics Acceleration Library. Click to learn more. http://pubads.g.doubleclick.net/gampad/clk?id=278785231&iu=/4140 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
