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[00:36:20] <andypugh> is vec=14 always a segfault?
[00:37:19] <andypugh> I am looking at somebody else's kins file, and we get [11937.333687] RTAPI: Task 1[eef94000]: Fault with vec=14, signo=11 ip=fd23f019. at program line x = 250 - ((D1*sin(a-a0))+(D2*cos(180-((a-a0)+f+a1))));
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[00:38:15] <andypugh> Ah, bear with me, he has #defined D1 and D2
[00:41:17] <cradek> let's see the whole file?
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[01:07:55] <andypugh> I think I have spotted it, but it prompted something else..
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[01:14:31] <CIA-95> EMC: 03andypugh 07v2.5_branch * r9a3697335d5b 10/docs/rtfaults.txt: Document an easier way to track down segfaults.
[01:19:33] <CIA-95> EMC: 03andypugh 07v2.5_branch * rcb1d99a6d858 10/docs/rtfaults.txt: Gosh Darn it! I chose a module with more than one problem as an example.
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[01:33:12] <andypugh> cradek:
http://pastebin.com/bWxaYq6e
[01:34:13] <andypugh> It segfaults on line 43, which I assume is the #defined D1 or D2.
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[01:35:13] <andypugh> It's not my file, he has also changed "joints" to "joint" and "pos" to "world" and I don't know if it is wise to not pass-through the other joints.
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[01:46:32] <andypugh> Looks like the problem is not creating some HAL pins that he meant to.
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[02:07:54] <jepler> yes, haldata is never initialized
[02:08:00] <jepler> well, with anything non-NULL
[02:08:52] <andypugh> hi jepler
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[02:10:17] <jepler> hi andypugh
[02:10:28] <andypugh> Err, while you are here, I found an old message from you about "queue not empty after probe". Did you get to the bottom of that? A chap on the forum could probe OK with 4 axes, changed to a 5-axis config, and gets that error. Cause and effect are not confirmed.
[02:12:27] <jepler> when I got that error I'd already heavily modified probing (the now-discarded "high-resolution probing") so it's hard to say whether there's a single cause for both that old report and this report..
[02:13:00] <andypugh> Hmm, at what point was high-res probing discarded?
[02:13:40] <andypugh> (that was probing-to-index? I thought that was still there last time I was looking inside the encoders)
[02:13:49] <jepler> well, simultaneously with getting that error a lot with my new code, we also read the datasheet for cradek's wireless probe and discovered that it introduces a 20ms delay in the "probe contact closed" signal anyway, so trying to latch the exact encoder count was a waste of effort..
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[02:15:11] <andypugh> I confess I had already concluded that things don't move far in a servo thread, though the concept seemed valid.
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[02:16:04] <jepler> right now you have to probe slowly enough that the distance moved in 1 servo cycle is irrelevant to the precision of the probe result desired
[02:16:53] <jepler> as well as slowly enough that you can go from the probe speed to stopped before the probe is damaged
[02:17:51] <jepler> but for many machines it's faster to probe twice, once at a fast speed for an approximate answer and one at a lower speed over the last <1mm for resolution
[02:18:13] <andypugh> I suspect that, in general, the second point is the limit?
[02:20:49] <jepler> some renishaw probe and tip combination has a 4.5mm overtravel displacement and 480mm/min probing speed
[02:21:53] <jepler> so if you can decelerate from 480mm/min to 0mm/min in ~4mm of travel you could probe at that 480mm/min
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[02:22:39] <andypugh> Anyway... Any ideas why one might get that error in 2.4.7?
[02:22:45] <jepler> nope
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[02:24:16] <andypugh> I _demand_ that you have an idea, and I might even start stamping my feet if that helps. (I have a manager a bit like that, he thinks that force of personality can trump physics)
[02:25:45] <jepler> ok: it could be a bug in emc2
[02:27:02] <andypugh> I am failing to reproduce the problem. It doesn't help that El User posts G-code and HAL files as png, and broken zip files.
[02:27:39] <andypugh> It's here if you want to share my frustration:
http://www.linuxcnc.org/component/option,com_kunena/Itemid,20/func,view/id,14097/catid,38/limit,6/limitstart,0/lang,english/#14097
[02:27:57] <jepler> that does sound frustrating.
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[02:29:06] <andypugh> But, "Bug in EMC2" does seem likely, so I would like to get to the bottom of it.
[02:34:25] <andypugh> Supplementary question... Canonical pin names are lower case. The latest Mesa cards declare their pins to the driver, but are mixed-case (and non-canonical). Should I attempt to munge to canonical format, or just accept that nothing else is right, and live with it?
[02:36:05] <jepler> I don't have a big stake in that.
[02:37:14] <jepler> fwiw I just ran servo-sim.ini in some random old 2.4.x clone, did some steps, and eventually got the "queue not empty after probing" message
[02:37:43] <jepler> machine on, home all axes, MDI g10 l2 p1 z-1, F4, auto mode, load smartprobe.ngc, run
[02:37:51] <jepler> userspace simulator
[02:38:03] <andypugh> Is the fix just to breeze through the error?
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[02:38:29] <jepler> probably not
[02:39:53] <andypugh> It indicates a genuine problem then? I am completely blank on what the error means.
[02:39:57] <jepler> during a probe, the expectation is that the only item in the queue is the probeing move itself
[02:40:07] <jepler> once the probe is completed, there should be no additional items in the queue
[02:40:41] <jepler> so it could mean that task thought the probe was completed when it was not, or it could mean that something else was put on the queue (the one between task and motion, I am pretty sure) in the meantime even though it shouldn't have been
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[02:41:51] <andypugh> My first guess was MDI_COMMANDS linked to probe, but he has none,
[02:42:37] <jepler> in this case I was running code, not MDI
[02:43:29] <jepler> there may be additional problems when mdi with "O call"s; that makes some brain cell fire but I can't tell you any more. maybe mharbler has tried to fix that? it's been awhile..
[02:44:25] <andypugh> Does probe ignore any axes? I am a bit vague on anything outside src/hal/drivers
[02:45:40] <jepler> in 2.4 any axis letters may be used in a G38.x probing movement
[02:46:05] <jepler> I think some old versions didn't let you specify anything but XYZ but I don't know which versions that might have been
[02:47:19] <jepler> maybe UVW axes? not sure..
[02:47:22] <jepler> in 2.1
[02:47:29] <andypugh> So it isn't unserviced AB moves in the motion queue then (not that he is moving them in probe). It just seems odd that his stated correlation is that 4 axes is OK, 5 axes not.
[02:48:44] <jepler> servo-sim is strictly 3 axes unless it changed while I wasn't looking
[02:49:24] <jepler> but depending what the problem is, maybe the additional work done for each additional axis makes the problem more likely to manifest (race condition or the like)
[02:50:25] <andypugh> Well, if you have found a way to make it happen in a sim, then perhaps I can too, which is a big step towards getting to the bottom of it, though I would prefer someone with a clue to pick it up, rather than me.
[02:52:12] <andypugh> git clone --more-devs
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[02:53:25] <jepler> that would be convenient
[02:53:30] <jepler> for now, goodnight
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[10:19:09] <jthornton> File `boost/mpl/if.hpp' does not exist.
[10:19:11] <jthornton> Must remake target `boost/mpl/if.hpp'.
[10:19:12] <jthornton> Failed to remake target file `boost/mpl/if.hpp'.
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[10:34:03] <jthornton> logger[mah]: log
[10:34:03] <logger[mah]> jthornton: Log stored at
http://emc.mah.priv.at/irc/%23emc-devel/2011-11-05.html
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[11:51:51] <jthornton> 2.5 builds :)
[12:05:45] <jthornton> master does not :(
[12:20:00] <seb_kuzminsky> jthornton: you have libboost-python-dev installed?
[12:23:24] <seb_kuzminsky> oh, also fetch again, mhaberler committed yesterday to get rid of some unneeded includes
[12:23:37] <seb_kuzminsky> ok i'm out, back on monday, have a good weekend everyone
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[13:12:38] <jthornton> I did a fresh pull with make clean
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[13:31:57] <jthornton> is libboost-python-dev something that needs to be installed by hand?
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[14:17:52] * jthornton wonders if I need to rerun sudo apt-get build-dep emc2 and sudo apt-get install build-essential autoconf?
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[18:04:03] <jepler> jthornton: (unless you're using the buildbot repository) apt-get build-dep installs dependencies for the stable version; it won't know about new dependences like libboost-python-dev
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