On Saturday 15 August 2015 03:36:55 Nicholas Mc Guire wrote: > On Fri, 14 Aug 2015, Jeff Epler wrote: > > As you may know, the current stable version of Debian (8.1 "jessie") > > does not have a realtime kernel packaged by debian.org, because the > > kernel version they selected (3.16) never got an rt patchset. > > > > However, Debian testing currently is based on linux kernel 4.1.3, > > and there is a matching rt patchset already included in the Debian > > package. > > > > I have rebuilt this package for Debian 8.1 amd64, and boot-tested it > > on one machine (my laptop), where I get OK but not great realtime > > performance (around 100us on a 5-hour test), but as I don't have any > > results for other rt kernel versions on this hardware it's not a > > great test. > > > > $ uname -a > > Linux babs 4.1.0-1-rt-amd64 #1 SMP PREEMPT RT Debian 4.1.3-1.1 > > (2015-08-14) x86_64 GNU/Linux > > there have been a few problems reported with 4.1.3-rt3 on the rt-users > mailing list - you might want that run a bit longer (on a i7 octocore > here the problems showed up after a few days only) > > > As far as I know, the package would rebuild for 32-bit machines with > > no trouble. > > > > The package repository is > > deb http://media.unpythonic.net/debs/ jessie/ > > deb-src http://media.unpythonic.net/debs/ jessie/ > > and it's signed with the public key C0873E61 "Jeff Epler (Package > > signing key) <jep...@unpythonic.net>" which is included below. > > would you mind cross-posting that to rt-users ? it would be a good > way of getting broader testing of this particular rt kernel which is > benificial for EMC and obviously also for PREEMPT_RT. > > > At some point I'll delete and recreate this repository. I made the > > unfortunate decision to mix non-Free (but redistributable) packages > > into the same repository, namely the nvidia proprietary video > > drivers also backported from debian testing. When I recreate it, > > I'll make sure the division between Free and non-Free is clear, or > > just skip the proprietary stuff entirely. So please don't depend on > > the longevity of the above-named package archives.
The proprietary nvidia driver and real time have NOT live peacefully on the same planet here. In fact I an amazed you managed to get 100 u-sec latencies out of it. My prior experience is more like 200 milliseconds, causing motor stalls at 5 ipm! So I avoid the nvidia supplied drivers like the plague. The nouveau driver does not suffer from this use of IRQ lockouts for extended periods of time. YMMVC, but I doubt if things have improved that much. > > There is not presently a pre-built linuxcnc package for debian > > jessie amd64, so you'll also have to build that for yourself. > > > > If you do try out these packages, please report your realtime > > results on the mailing list. > > thx! > hofrat > > ---------------------------------------------------------------------- >-------- _______________________________________________ > Emc-developers mailing list > Emc-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-developers Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
