#emc-devel | Logs for 2011-08-17

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[00:51:35] <jepler> an "order 7" allocation seems to be 512kB of contiguous (in physical address space?) memory. your kernel is out of any blocks that big -- "Normal: ... 0*512kB ..."
[00:52:34] <jepler> a linux developer would tell you that your kernel module should deal gracefully with this condition; high-order allocations should be rare and done early
[00:53:31] <jepler> it could also point at a memory leak of something in kernel space (like emc or rtai), particularly if you've run many times without rebooting
[00:58:39] <skunkworks_> jepler: this was just booted. - applied some patched from seb - then ran emc
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[00:59:25] <skunkworks_> (with a make and such)
[01:01:40] <skunkworks_> and like I say - emc loaded. (I just powed it up and homed it) so it seems to be working. not something to worry about?
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[01:10:45] <skunkworks_> bbl
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[01:21:31] <jepler> I don't know. if it runs, it's probably fine..
[01:21:52] <jepler> I'm not sure of the purpose of that allocation
[01:27:27] <jepler> I think that emc does not use the "rt heap" for memory allocation
[01:27:45] <jepler> the "rt heap" is an area from which allocations can be made even in realtime code, but emc doesn't do any allocations of that kind.
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[01:48:18] <skunkworks_> logger[psha]:
[01:48:50] <skunkworks_> jepler: thanks
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[14:51:41] <CIA-11> EMC: 03seb 07v2.5_branch * r062f1c15ebb9 10/src/hal/drivers/mesa-hostmot2/encoder.c: hostmot2: warn of old buggy muxed-encoder version
[14:51:43] <CIA-11> EMC: 03seb 07v2.5_branch * r731056d3e599 10/src/hal/drivers/mesa-hostmot2/encoder.c: hostmot2: parse muxed vs regular encoder mds right
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[15:14:47] <skunkworks> Yay!
[15:15:33] <skunkworks> Now the firmware needs to be straitened out?
[15:17:28] <CIA-11> EMC: 03seb 07v2.5_branch * rdf3a92466ec2 10/scripts/latencyplot.in: make latencyplot fail gracefully if blt is missing
[15:18:57] * skunkworks wonders what effect the 16.6666 times velocity signal to the B axis encoder will be. bet some re-tuning will be in order
[15:33:11] <CIA-11> EMC: 03seb 07v2.5_branch * r791ad03f023c 10/scripts/latencyplot.in: better error messages in latencyplot
[15:37:55] <JT-Shop> Yippie!
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[16:09:52] <cradek> yay, guess he found the velocity problem
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[16:10:18] <cradek> wonder if that'll mess me up now... I forget which card drives the axis with the simulated tach.
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[16:11:31] <KimK> In my first attempt I seem to have created a component that freezes EMC, linux, everything. When the splash screen comes up and it says "Starting EMC...", you're done using the computer. Turn it off and back on. Any advice?
[16:12:02] <cradek> I suggest fixing whatever is wrong with your component
[16:12:30] <KimK> What could it be, do you think?
[16:12:42] <KimK> Pastebin?
[16:12:42] <cradek> I have nothing to go on...
[16:12:45] <cradek> sure
[16:13:21] <KimK> It's a very slightly modified version of the existing estop_latch
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[16:15:45] <KimK> http://pastebin.com/dEibsEeg
[16:17:57] <KimK> I know that if I comment out the "loadrt estop_latch2" line, it doesn't freeze. If I do it errors out for the usual reasons (component not found, etc.)
[16:18:36] <cradek> http://pastebin.com/eRrXJKf2
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[16:18:57] <cradek> the differences between the version on master and your version do not appear crashworthy
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[16:19:52] <KimK> Could it be something I did wrong as far as compiling generally, installing the component, etc.?
[16:20:01] <cradek> I'm not sure
[16:20:17] <cradek> too bad there's only and2, but you need and3+
[16:20:41] <cradek> ... which is a good general argument for using ladder instead
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[16:21:02] <KimK> Any advice as far as how to troubleshoot such a problem, to find out things before I let it freeze?
[16:21:29] <cradek> if you use the original estop_latch it's fine?
[16:22:33] <KimK> It should be, except then it errors out for the usual reasons (inputs not previously declared, etc.)
[16:23:12] <KimK> I haven't gone back to it to see since I did the "2" version, but I can try it.
[16:23:14] <cradek> maybe try your comp in a sim build instead? it can't crash the whole machine then.
[16:23:40] <cradek> but really, I don't see that you've done anything wrong *in the code*
[16:23:44] <KimK> OK, now that's a thought.
[16:24:14] <cradek> but really, for chaining together logic like this, ladder is very superior
[16:25:02] <cradek> it has edge detection built in
[16:25:20] <cradek> your whole comp is easy to rewrite in a couple simple ladder rungs
[16:25:48] <cradek> bbl
[16:25:50] <KimK> Alright, I'll try a sim build, and if that doesn't help, then back to "1" as a test, and forward to ladder. Thanks, I think you've given me a direction. (Or two?)
[16:25:57] <KimK> Thanks, bye!
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[18:09:44] <skunkworks> cradek: the firmare that gets loaded into the mesa card had a little error. So - that has to be updated also
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[18:32:35] <KimK> skunkworks: What firmware was wrong, and how was it wrong?
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[18:35:06] <skunkworks> with the 7i48 (6 axis analog servo interface) the muxed encoders ouput the wrong velocity
[18:35:38] <skunkworks> it is 16.6ish times too small
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[18:36:16] <KimK> Excellent, I expect to be using the 7i48 shortly. Chris already is.
[18:36:35] <KimK> (shortly being loosely defined there, lol)
[18:36:48] <skunkworks> so for me - when the spindle encoder was spinning at 300rpm - the velocity output should have been 5 (rps) and it was showing .300ish
[18:37:22] <skunkworks> (I just scaled it and it worked for me - but seb and peter tracked it down)
[18:37:37] <KimK> Wow, and 16.6 something and not 16 exactly? Whaddya know.
[18:38:00] <skunkworks> it was a clock divider thingie it wasn't exactly 16.6
[18:38:13] <KimK> Ah, so 1/6, maybe?
[18:38:27] <KimK> No, that's not right.
[18:39:00] <KimK> Well, anyway, glad they fixed it. Congrats to Peter and Seb.
[18:42:37] <skunkworks> Yes - they are some smart guys
[18:43:02] <skunkworks> I think it is what ever firmware is in the repository.
[18:43:26] <skunkworks> I don't think I have done anything different on that front
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[18:45:16] <skunkworks> KimK: how is it going at the shop?
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[19:13:30] <KimK> skunkworks: It's always something. Right now I'm not working on the Mori Seiki like I should be, instead I'm getting beat up by the enshu, but I may be gaining on it. I'm getting an emc segfault, it appears: http://pastebin.com/E1tPnHQT Any advice or suggestions appreciated.
[19:16:02] <KimK> Oh, wait, I forgot to sudo make setuid, forget that one, let me re-do it. Yes, it's still freezing.
[19:17:48] <KimK> It doesn't freeze if I comment out either "loadrt hal_ppmc" or "loadrt estop_latch2"
[19:20:30] <cradek> wasn't the enshu already working?
[19:21:48] <skunkworks> KimK: I second the use of ladder for that... I used the wiki sample and it was 1 rung for great working estop solution.
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[19:26:26] <cradek> seb!
[19:26:27] <skunkworks> seb_kuzminsky: !!
[19:26:32] <skunkworks> heh
[19:27:11] <seb_kuzminsky> hi guys!
[19:27:17] <seb_kuzminsky> long time no see :-)
[19:27:32] <skunkworks> we thought you didn't like us anymore :(
[19:27:58] <seb_kuzminsky> hey i wouldnt spend 2 weeks debugging your machine if i didn't like you ;-)
[19:28:13] <skunkworks> heh - thanks again. Glad you guys figured it out.
[19:28:26] <seb_kuzminsky> heh
[19:28:51] <seb_kuzminsky> i just hope we can get the fix into our firmware at some point
[19:29:49] <skunkworks> well - I didn't want the others to feel bad about you not talking to them... ;)
[19:30:48] <KimK> Hi Seb, thanks to you and Peter for fixing the 7i48 (and others?)
[19:31:21] <seb_kuzminsky> it was peter who fixed it, i just helped him find it
[19:32:22] <seb_kuzminsky> the fix is for a bug in muxed encoder velocity reporting (just affects the 7i48 afaik)
[19:33:42] <CIA-11> EMC: 03mhaberler 07master * r449512fd53c5 10/src/emc/rs274ngc/ (interp_convert.cc interp_execute.cc rs274ngc_pre.cc): interp/T,M6,abort handlers: remove save/restore bracket of global state around handlers
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[20:02:03] <seb_kuzminsky> ugh our docs take forever to build now, zzzzzzzzzz
[20:03:10] <skunkworks> really? I guess I walked away while it was building when you sent me all the patches. I didn't notice/
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[20:05:10] <seb_kuzminsky> maybe you configured with --disable-build-documentation? i always do...
[20:05:43] <skunkworks> seb_kuzminsky: did you see jeff's reply to the insmod error I got?
[20:05:50] <skunkworks> seb_kuzminsky: not that I know of..
[20:06:43] <seb_kuzminsky> i didnt see it
[20:07:07] <skunkworks> seb_kuzminsky: http://psha.org.ru/irc/%23emc-devel/2011-08-17.html
[20:07:58] <seb_kuzminsky> which day was it?
[20:08:11] <seb_kuzminsky> oh i see
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[20:19:11] <CIA-11> EMC: 03seb 07v2.5_branch * r6b1b65c47724 10/ (4 files in 2 dirs): only install latencyplot if it's going to work
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[21:53:46] <KimK> andypugh: When you've finished in #emc, I'd like to chat with you further about my emc freeze issue. I've used official emc components (estop_latch, or2) to replace my estop_latch2. It still freezes on startup. Advice appreciated.
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[21:54:26] <andypugh> Proper freezes? or just fails to load?
[21:54:55] <KimK> No, good and proper, as you say there. I have to turn it off and back on.
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[21:57:30] <KimK> I had been able to comment out at least two "loadrt somethings" and get it to merely fail to start, but I haven't gone back to that mode of testing lately, since I have to reboot each time. I was hoping to learn a more sophisticated test method.
[21:57:58] <KimK> I hadn't tried them all, of course.
[21:59:04] <andypugh> Well, you can do it a step at a time in halcmd
[21:59:42] <KimK> Ah, now that sounds like a good idea. Paste from the hal file into halcmd?
[21:59:55] <andypugh> I have never crashed it so badly that way that I couldn't find out what the problem was (and that included shifting bits into the sda buffer)
[22:00:08] <andypugh> halrun \\ source file.hal
[22:00:37] <andypugh> (the \\ just indicates the next command line)
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[22:01:11] <andypugh> Won't work if reference is made to an ini file. There is a way, but I have never needed it.
[22:02:09] <KimK> OK, I'll try that, thanks. Give me a few minutes.
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[22:02:51] <andypugh> OK, so I have added a new remote to my repo, how do I check out a branch from it?
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[22:05:08] <KimK> Well, regular checkout would be "git checkout -b v2.4_branch origin/v2.4_branch" so maybe replace origin with remote?
[22:05:24] <KimK> remote name
[22:05:56] <KimK> The full name if you haven't used it before, the informal name if you've told git about it.
[22:06:43] <andypugh> git remote list origin and mh, so that part seems OK. I am not sure how to list the branches on mh
[22:07:25] <KimK> git branch -r ?
[22:09:03] <andypugh> only list branches in origin
[22:09:19] <andypugh> It may be that I messed up adding the remote.
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