On Tue, 2 Feb 2016, Nicklas Karlsson wrote: > Date: Tue, 2 Feb 2016 22:27:59 +0100 > From: Nicklas Karlsson <nicklas.karlsso...@gmail.com> > Reply-To: "Enhanced Machine Controller (EMC)" > <emc-users@lists.sourceforge.net> > To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> > Subject: Re: [Emc-users] Prempt RT --> RTAI, Xenomai, delay > >> ... >> That's because NOBODY (manufacturers or distributors) wants to futz with >> testing motherboard latencies, problems with their obsolescence, IO >> boards, controllers, USB issues, etc. All that is a big concern to >> anybody who wants to see LinuxCNC as part of their business. > > Preempt RT do not manage priorities properly for interrupts while RTAI and > Xenomai do. It is rather simple, execution time to service an interupt every > now and then will delay real time tasks with as much time as they take to > execute. Then there are SMI which will interrupt anyway. I run control loop > at micro controller at 40kHz and it works perfect because it allow nested > interrupts with priority. >
umm not true at all http://freeby.mesanet.com/h97-g3258-preemt-rt.png RTAI is not significantly better on decent modern hardware Many PC latency issues are hardware related (DMA, Caching etc) and affect Preempt-RT, RTAI and Xenomai equally >> ... > > > Nicklas Karlsson Peter Wallace Mesa Electronics ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=267308311&iu=/4140 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
