Which is why I have been trying to agitate for preempt-rt ..... it's now following mainline, and is available on ALL architectures since it's general ...
Still sometimes there are driver problems, but check out osadl.org for ARM. / regards, Lars Segerlund. 2012/3/30 EBo <e...@sandien.com>: > On Fri, 30 Mar 2012 11:36:04 -0500, Jon Elson wrote: >> Anders Wallin wrote: >>>> 2) How portable is the real-time code (ie: can it be compiled for >>>> Arm >>>> or PowerPC)? >>>> >>> >>> LinuxCNC uses the RTAI kernel/API. There are a number of >>> architectures >>> listed here https://www.rtai.org/ >>> I don't know if anyone has made LinuxCNC work on other than x86 and >>> x86_64 >> >> I sent Torsten Koschorrek of RTAI a Beagle Board about 18 months ago, >> and as >> you can see, there is no ARM Cortex-A8 RTAI available yet. I can't >> believe it has taken >> this long! There is an RT-Preempt kernel that was done by some >> French >> guys, but I don't >> know if it has suitable latency for LinuxCNC, but it almost certainly >> is >> good enough >> for a system with attached hardware (not software stepping). > > <soapbox> > > That is what I was planning to work on with artek's NURBS hardware. If > you get similar stuff working with RT-preempt. The biggest problem with > RTAI is that the patches are to invasive to the kernel and each time > even a minor update to the kernel happens it needs to be majorly tweaked > by hand and (from my experience) never just updates. Then there are all > the bad feelings between the RTAI community and those using/promoting > RT-Linux. Personally I was caught in the crossfire and was left with no > love of RTAI. I am glad that there is a decent alternative. BTW, for > technical correctness, RTAI and RT-Linux will *always* be faster and > have less latency than the preemptive and similar approaches, but > getting RTAI working is truly a pain unless you only use the precompiled > CD/DVD version, and sometime that is not a realistic option. > > <\soapbox> > > EBo -- > > > ------------------------------------------------------------------------------ > This SF email is sponsosred by: > Try Windows Azure free for 90 days Click Here > http://p.sf.net/sfu/sfd2d-msazure > _______________________________________________ > Emc-developers mailing list > Emc-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-developers ------------------------------------------------------------------------------ This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
