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[00:43:46] <andypugh> Someone is reporting that having installed uspace and linuxcnc from debs he didn’t have halcompile, and apt-get install linuxcnc-dev installs the rtai kernel. Is this to be expected?
[00:44:08] <andypugh> [citation needed]
https://forum.linuxcnc.org/forum/30-cnc-machines/30876-emcoturn-120-lathe-retrofit?start=160#77114
[00:45:05] <cradek> I think it's spelled linuxcnc-uspace and linuxcnc-uspace-dev
[00:46:17] <cradek> linuxcnc-uspace-dev:
[00:46:18] <cradek> Installed: (none)
[00:46:18] <cradek> Candidate: 1:2.7.4
[00:46:23] <cradek> yeah, that's the ticket
[00:47:17] <cradek> that might be a doc error?
[00:49:21] <andypugh> Not sure
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[01:54:27] <cradek> wow, Ed's photos of his mini lathe as-received:
https://softsolder.com/
[02:25:31] <Tom_itx> is there anything that comes in in good shape anymore?
[02:35:26] <mozmck> I built packages of master on 16.04 installed in VirtualBox, and I had to add --dpkg-shlibdeps-params=--ignore-missing-info to the dh_shlibdeps line in debian/rules because it couldn't find info on the openGL lib installed by vbox
[02:36:15] <mozmck> So I'm guessing I should use KVM for building instead?
[02:37:43] <mozmck> hmm, or maybe not install the guest additions
[02:41:32] <cradek> maybe pbuilder?
[02:44:03] <mozmck> does that run another system?
[02:44:40] <mozmck> My host is linux mint, and I'm trying to do some testing with xubuntu 16.04
[02:45:39] <cradek> it's the thing that builds isolated, without depending on the state of your current system so much
[02:45:44] <cradek> like what buildbot uses
[02:46:02] <cradek> but yeah if you avoid the guest stuff maybe it'll be fine
[02:46:14] <cradek> that stuff is generally badly packaged
[02:46:33] <mozmck> huh. I saw that buildbot had something for KVM. I'll have to look at pbuilder again.
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[03:44:16] -linuxcnc-github:#linuxcnc-devel- [13linuxcnc] 15hazelnusse commented on issue #106: @SebKuzminsky is there anything more needed for this to go in? The only thing I can think of is setting up a build slave that has libmodbus 3.1.x so that tests can be run that would actually exercise the code in this patchset. I realize this is probably pretty low priority so no worries if you guys want to wait before merging this. 02
https://github.com/LinuxCNC/linuxcnc/pull/106#iss
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[10:41:24] -linuxcnc-github:#linuxcnc-devel- [13linuxcnc] 15andypugh commented on issue #107: I think that this also needs a manpage in docs/man/man9... 02
https://github.com/LinuxCNC/linuxcnc/pull/107#issuecomment-231043974
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[12:40:29] -linuxcnc-github:#linuxcnc-devel- [13linuxcnc] 15jepler opened pull request #108: Preview: uspace+RTAI (06master...06uspace-rtai) 02
https://github.com/LinuxCNC/linuxcnc/pull/108
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[13:22:40] -linuxcnc-github:#linuxcnc-devel- [13linuxcnc] 15tinkercnc commented on issue #108: Suggestion: ... 02
https://github.com/LinuxCNC/linuxcnc/pull/108#issuecomment-231075637
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[14:08:54] -linuxcnc-github:#linuxcnc-devel- [13linuxcnc] 15jepler commented on issue #108: @tinkercnc that would be a fine topic for a different PR, thanks. 02
https://github.com/LinuxCNC/linuxcnc/pull/108#issuecomment-231088351
[14:11:54] <jepler> yay, description on pull #108 updated. silly github for eating my text in the first place.
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[14:12:57] <jepler> tl;dr: uspace has to change just slightly to work with rtai-realtime but then there's a lot of boring work yet to do. latency looks pretty good, but I didn't stress it yet (or compare to what my system does with rtai realtime and linuxcnc with traditional kernel modules)
https://cloud.githubusercontent.com/assets/1517291/16655638/e16a2c40-4420-11e6-8840-8dcf7e7324d7.png
[14:13:51] <cradek> does this loosen the requirements that the linuxcnc build and the rtai kernel match closely?
[14:15:13] <jepler> cradek: I'm not sure
[14:15:45] <jepler> I don't know if liblxrt.so has a stable ABI or not
[14:15:52] <cradek> there'd be no kernel modules except the rtai-provided ones, right?
[14:15:57] <cradek> oh hmm
[14:15:58] <jepler> yes that is true
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[14:16:59] <cradek> sure seems likely to help
[14:17:41] <jepler> the part that would be dependent on rtai/liblxrt version is just one ~200-line file
[14:26:28] <jepler> the realtime script for loading/unloading those modules would have to know how to find the modules that match the running kernel (we install them such that 'modprobe' doesn't find them, more's the pity)
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[16:19:23] <skunkworks_> Isn't there something about classic ladder only running at 1ms - no matter what the base thread is?
[16:19:38] <skunkworks_> *Servo thread
[16:22:06] <cradek> I remember that too, but I think it's no longer the case
[16:22:08] <cradek> what are you seeing?
[16:22:41] <skunkworks_> The post on the forum about the monostable acting funny
[16:23:13] <jepler> I didn't read every comment but
https://github.com/ShabbyX/RTAI/issues/16#issuecomment-44211118 makes it sound like their conclusion is that lxrt abi is pretty stable
[16:23:31] <jepler> I think I have two different rtai kernels available on my test machine, I can try it for myself..
[16:27:45] <jepler> > At least earlier RTAI kernels provided by the LinuxCNC project have had kernel symbol versioning turned off, which allows kmodules built for one kernel to be inserted into a different kernel. IMO this is a dangerous thing to do, ...
[16:27:50] <jepler> hm did we really?
[16:27:53] <jepler> on purpose?
[16:28:53] <cradek> the mists of time make it hard to say for sure
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[16:53:08] <skunkworks_> I know people are taking realtime modules (like linecurve) from linuxcnc and putting them on pathpilot without issues
[16:59:04] <cradek> I think pathpilot uses the linuxcnc rtai kernel on ubuntu10
[16:59:19] <cradek> so it's not surprising that modules from our packaged releases work
[16:59:42] <cradek> but I cry for people who do that kind of thing without using the packaging system
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[20:13:08] <KGB-linuxcnc> 03Sebastian Kuzminsky 05master 660a629 06linuxcnc 10docs/src/code/building-linuxcnc.txt docs: fix a typo in Building LinuxCNC * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=660a629
[20:13:08] <KGB-linuxcnc> 03Sebastian Kuzminsky 05master 092017b 06linuxcnc 10docs/src/code/building-linuxcnc.txt docs: more packaging info in Building LinuxCNC * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=092017b
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