I agree entirely.. I tell this has been a lot of work! I'm sorry that I have been too busy to do any testing the last month or so.
Dave On 1/16/2013 10:49 AM, Kent A. Reed wrote: > On 1/16/2013 9:15 AM, Michael Haberler wrote: > >> a short update: >> > There's a lot of really good news here, folks. My thanks and a tip of > the hat to Michael, John, Charles, and everyone else who has > contributed. I doubt most of us can appreciate how much work has been > done to get us to this point. The devil's in the details as they say. > > >> linuxcnc development branches: >> >> ... John and me are working to produce a single 'userland threads' build >> which supports all of the mentioned styles, and activates them based on >> autodetection of the underlying kernel (default) or explicity through a >> startup option. This should make it significantly easier for the build >> process, and also for trying different kernels with the same configuration >> (reboot, but no rebuild required). >> > This is terrific. I've futzed with various schemes to keep separate > builds available on the same machine and it's a real nuisance. > > >> ... >> >> x86 kernels: >> >> from the 'it doesnt boot on my machine' perspective it seems we're through >> the worst with this kernel: >> http://static.mah.priv.at/public/xenomai-debs/linux-image-3.2.21-xenomai+_0.4_i386.deb >> . However, John is working with the folks on the Xenomai list to produce >> debian-style and other 'universal' kernels which likely will be based on a >> later vanilla kernel (3.5.x). Since these will likely see more exposure than >> my initial attempt I would rather bet on that option. There is also talk >> about forward-porting the ipipe patch to 3.8 so with that route it seems to >> me the 'kernel too old' problem will go away. John probably can give a >> better picture here. >> > Fortunately, all your kernels have booted on my machines without any > problems not of my own making. I'm glad to hear the worst is over for > others. > > I'm also relieved to hear the ipipe folks are still breathing. > > >> from the latency perspective, I must say the results are still confusing - >> we have Sam's AMD results which are disappointing, and we have other reports >> like memleak's which really shine on an AMD (different base version though). >> We have no figures from the efforts on the Xenomai list yet, but that >> shouldnt be too long. Also memleak has access to my git kernel repo and I am >> looking forward to having a build which can be reviewed on other platforms >> as well. So here it's more about consistent results, rather than >> instability. In fact I havent seen a kernel oops or crash with the 3.2.21 >> based kernels in quite a while. >> > Sam's results were so different from my own that I keep thinking there's > something obvious we're missing here. Time will tell. I need to repeat > my tests using the latest version. > > >> ARM work: >> >> Several people have been able to get the Beaglebone ubuntu/xenomai setup >> working as outlined here: >> http://wiki.linuxcnc.org/cgi-bin/wiki.pl?BeagleboneDevsetup >> I have updated the kernel and rootfs image a few days ago so the kernel >> includes ext2/3/4 support compiled in, which should take care of two failure >> reports I got. >> >> Again that xenomai kernel is based on 3.2.21; it works very stable for me >> but there have been several reports of 'sudden stops'. The BB is a bit >> sensitive to power fluctuations but it might be more than that. As for that >> kernel, it works, but it is based on a branch which will see no further >> development. It supports most of the stuff needed to development; there >> might be some patches coming from more active BB users than me. >> > I'm not convinced it is solely a power supply issue, at least not in my > case, but more usage should shed light on any underlying problems. I'd > be happy to be proven wrong. > > >> Charles has done some great work for a high-speed stepgen on the Beaglebone, >> and a few folks have reproduced that, but I leave the fanfare to Charles >> here;) >> > That's your cue, Charles; time to appear through the curtain before the > drum roll stops :-) > > >> I have done no further work on the Raspberry, I do not consider that >> platform particularly useful to base work on. >> > Yep. For me, the RPi ranks right up there with Arduinos as fun but > ultimately dissatisfying. I'm using mine for spur-of-the-moment projects. > > >> RTAI note: >> >> I was pointed to this thread recently, which is interesting to read for >> several reasons: >> https://mail.rtai.org/pipermail/rtai/2012-December/thread.html "Git >> repository for RTAI" >> >> It does mention a Ubuntu 12.04 RTAI kernel (Shahbaz Youssefi shabbyx at >> gmail.com Tue Dec 18 11:09:41 CET 2012) - it might be worth following that >> up, maybe this is an option to get the current builds out of the 10.04 >> end-of-support-life situation. I would appreciate if somebody more >> RTAI-aware than me would pick that up. >> >> It also touches on the issue how the source repository and collaboration >> model touches upon a project's success, and that's an interesting read. It >> looks like the nature of open source communities changes due to for instance >> the github model, making it easier for the casual contributor, which is a >> sore spot with the linuxcnc proejct. Something to think about. >> > Interesting read, indeed. > > Regards, > Kent > > > ------------------------------------------------------------------------------ > Master Java SE, Java EE, Eclipse, Spring, Hibernate, JavaScript, jQuery > and much more. Keep your Java skills current with LearnJavaNow - > 200+ hours of step-by-step video tutorials by Java experts. > SALE $49.99 this month only -- learn more at: > http://p.sf.net/sfu/learnmore_122612 > _______________________________________________ > Emc-developers mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-developers > > ------------------------------------------------------------------------------ Master Visual Studio, SharePoint, SQL, ASP.NET, C# 2012, HTML5, CSS, MVC, Windows 8 Apps, JavaScript and much more. Keep your skills current with LearnDevNow - 3,200 step-by-step video tutorials by Microsoft MVPs and experts. 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