I fully share the urgency Michael feels about the issue, but I think that the RT issue is not easily tackled from LinuxCNC2.
So in LinuxCNC2 I would rather vote for getting Xenomai to work (again) as a real time alternative. If you look in the building scripts there always was that option, it has been neglected a bit lately. On top of it, there is the issue of the software stepgeneraration for a majority of systems, for which RTPREEMPT is not the perfect vehicle yet, unless you invest in a high-end board. My experience with other systems shows that RTPREEMPT is quite stable on the 3 series kernel, provided some rules are followed in your design. So personally I am not prepared to fantasize about backhacking RT into LCNC2, a few people have been at it now and nothing was finished into a workable product or perhaps the interest of the community is not there, I do not know. cheers, j. On Mon, Aug 27, 2012 at 10:04 PM, Michael Haberler <[email protected]>wrote: > I am late to get the gist on options for RT with Linux, but what I found > leaves me a bit speechless. > > My understanding is the following: > > LinuxCNC supports two RT linux kernels, RTLinux and RTAI. > > RTLinux is dead in the water. Website doesnt even respond. Product > abandoned by last owner, Wind River Systems. > > RTAI is a mostly one-man-show project locked into a single platform. > > The hope for RTAI on non-PC platform is just that - somebody seems to have > noticed a dead end here. > > RT_PREEMPT is where the Linux mainstream is heading, as is Xenomai stated > direction. > > There is no coordinated attempt on getting LinuxCNC to run out of the box > on RT_PREEMPT or Xenomai, or any other alternative, despite some work as at > least a starting point being available. > > --- > > Please tell me where I'm wrong: is this really it - Paolo walks into the > wrong car, and the LinuxCNC project has no viable and believably maintained > kernel alternative at hand? > > If I'm right: this must be changed ASAP, and this is a LinuxCNC2 issue. > > At the risk of hurting some feelings: if LinuxCNC were my company, and my > chief tech told me "this is our strategy", I would have this fellow empty > his desk the very same day. > > - Michael > > > ps: I am leaving software stepgen type performance issues out of the > picture for now, and on purpose - I dont think this is a terribly > important property going forward given the hardware on the market at a > reasonable price point and with good integration into LinuxCNC. > > ------------------------------------------------------------------------------ > Live Security Virtual Conference > Exclusive live event will cover all the ways today's security and > threat landscape has changed and how IT managers can respond. Discussions > will include endpoint security, mobile security and the latest in malware > threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ > _______________________________________________ > Emc-developers mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-developers > ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
