On Wednesday 16 January 2013 13:15:44 Kent A. Reed did opine: Message additions Copyright Wednesday 16 January 2013 by Gene Heskett
> 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-xeno > > mai+_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 Same here Kent, and I am waiting for the first proposed cd alfa image that will boot on x86. I have a sacrificial goat in the garage that will torture test it, slow 1ghz athlon, short of memory. Should make a great goat. > > ------------------------------------------------------------------------ > ------ 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 Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> is up! My views <http://www.armchairpatriot.com/What%20Has%20America%20Become.shtml> It's useless to try to hold some people to anything they say while they're madly in love, drunk, or running for office. I was taught to respect my elders, but its getting harder and harder to find any... ------------------------------------------------------------------------------ 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
