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[11:41:39] <skunkworks> zlog
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[12:40:14] <jepler> I guess zlog got tired
[12:41:45] <JT-JA> is this a problem? debian/configure -r ; debuild -uc -us
[12:41:46] <JT-JA> your kernel '4.1.7-rt-rt' is not known. There might be needed dependencies which won't get set automatically.
[12:42:46] <jepler> are you trying to build for uspace / preempt-rt?
[12:42:55] <JT-JA> preempt-rt
[12:43:14] <jepler> then you need to debian/configure uspace
[12:43:27] <jepler> debian/configure -r is for rtai only
[12:43:38] <JT-JA> ok, so preempt-rt only is for uspace then
[12:44:20] <jepler> $ debian/configure --help
[12:44:33] <jepler> if you think that help can be refined, please do
[12:44:34] <JT-JA> thanks
[12:44:47] <jepler> such as mentioning that [kernel-version] / -r are for RTAI realtime only
[12:45:10] <jepler> see, for rtai realtime we have to compile for the exact kernel, have that kernel's headers available when we compile, etc
[12:45:34] <jepler> for uspace (whether it's for sim, or for realtime with preempt-rt) it doesn't need to do anything specific to the kernel while compiling
[12:47:11] <JT-JA> thanks that helps me understand
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[13:42:27] <JT-JA> and now I have preempt-rt and ja13 running on this computer thanks jepler
[13:47:52] <jepler> yay, I'm glad
[13:48:36] <JT-JA> going to do it again in the morning on another pc to make sure I have all my instructions correct and my mind right
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[14:16:48] <JT-Shop> so preempt-rt/uspace is for both ethernet mesa cards and pci/pcie mesa cards?
[14:16:56] <jepler> JT-Shop: yes
[14:17:06] <JT-Shop> thanks
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[14:19:58] <skunkworks_> http://imgur.com/aEYxzal
[14:20:17] <skunkworks> that might be usable...
[14:21:59] <skunkworks> have to hook up a 7i92 and see how it runs
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[14:30:24] <skunkworks> not too warm either..
[14:30:37] <skunkworks> fan certainly runs more..
[14:32:21] <skunkworks> (t520)
[14:32:42] <jepler> yeah my laptop sure runs warmer / higher fan when linuxcnc is going
[14:32:59] <jepler> it stops certain power management adjustments from happening
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[14:33:42] <skunkworks> happy so far with it..
[14:34:01] <skunkworks> jepler, do you always run the rt kernel?
[14:34:04] <jepler> https://pdfs.semanticscholar.org/d419/9b15bbaa1486d9b02e55363c4334a66a82a2.pdf
[14:34:12] <jepler> skunkworks: yes
[14:34:36] <jepler> changing cpu frequencies introduces latencies on the order of tens of microseconds
[14:35:14] <skunkworks> neat!
[14:36:29] <skunkworks> Looks like the only thing that doesn't work for me is virtual box. (not kernel driver)
[14:36:37] <skunkworks> *no
[14:36:43] <jepler> not something I use
[14:36:48] <skunkworks> right
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[16:53:29] <JT-Shop> I never would have thought of a bad video cable but that was the problem yesterday with the asrock, one pin was bent over on the cable
[17:10:02] <pcw_home> Thats why you had trouble with the digital video on the H97?
[17:10:38] <JT-Shop> yes
[17:11:23] <JT-Shop> I brought the j1900 up from the beer cave and plugged it in and had the same issue so time to look at the cable
[17:12:54] <pcw_home> HDMI cable?
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[17:14:29] <JT-Shop> no, DVI
[17:15:47] <pcw_home> Ahh those have crumpleable pins
[17:16:16] <JT-JA13> yep, the monitor came from a cat scan machine or something like that so only analog and DVI
[17:18:22] <JT-JA13> bah I need to build the html docs the pdf is too hard to read but its search-able
[17:24:46] <seb_kuzminsky> JT-JA13: the htmls docs are searchable if you're only, but maybe you want local search
[17:25:32] <JT-JA13> yea that's what I was talking about a local search
[17:26:56] <JT-JA13> something tells me I don't have the right stuff in /etc/network/interfaces to talk to the 7i92...
[17:27:45] <JT-JA13> yep missing one line from my instructions lol
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[17:33:45] <JT-JA13> and it helps to have the 7i92 plugged into the right port
[17:34:01] <JT-JA13> on to the next task build a JA configuration
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[17:48:46] <jepler> skunkworks: if you didn't install the related "headers" package for your rt kernel, doing so may let virtualbox build its kernel module
[17:48:57] <JT-JA13> WOW Dewey has a conversion tool for JA
[17:49:10] <skunkworks> JT-JA13, that was actually andy...
[17:49:35] <JT-JA13> super cool and it worked in like 1 second
[17:49:43] <skunkworks> Yes :)
[17:49:47] <JT-JA13> now to make some steppers move
[17:51:33] <jepler> hm actually trying to install virtualbox that way seems to have wedged the whole computer. oops. maybe it doesn't work right with -rt.
[17:53:43] <skunkworks> sorry...
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[17:56:28] <jepler> no problem, except I can't reboot it from remote
[17:56:43] <dgarr> skunkworks: i run virtualbox on jessie 4.1.0-0.bpo.2-rt-amd64 without problems
[17:56:57] <jepler> this is 4.4-based
[17:58:12] <dgarr> JT-JA13: credit andy for the update_ini script ffee19a 2013-12-19 00:43:56
[17:58:46] <skunkworks> oh - How would you do that if it is already installe?
[18:03:23] <jepler> skunkworks: whatever linux-image- you installed, now install the linux-headers- that match it
[18:03:42] <jepler> I don't think there's another step
[18:04:27] <jepler> in my case I didn't have virtualbox installed, but I had headers. I installed virtualbox-dkms first, and that worked (reported that it built the modules)
[18:04:46] <jepler> then to see if it worked, I actually installed virtualbox, but that wedged while dpkg was setting up the virtualbox package
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[18:08:11] <skunkworks> says I need to do a /etc/init.d/vboxdrv setup but that doesn't exist.
[18:08:15] <skunkworks> more research
[18:18:43] <skunkworks> with an ssd - this thing takes about 4 seconds to boot from grub to login
[18:19:58] <JT-Shop> wow
[18:21:20] * skunkworks loves ssd's
[18:21:45] * Tom_itx does as well
[18:21:54] <Tom_itx> huge difference just changing hdd to ssd
[18:23:03] <skunkworks> zlog
[18:23:07] <skunkworks> Tom_itx, !
[18:25:38] <skunkworks> huh - wanted me to do a sudo dpkg --configure -a
[18:25:59] <skunkworks> then it seemed to build the kernel modules - now the rt_preempt kernel boot loops
[18:26:03] <skunkworks> :)\
[18:26:38] <jepler> uh oh
[18:26:46] <jepler> sorry I ruined your new laptop :-(
[18:27:11] <skunkworks> heh - I can always go back to the image before I installed the realtime kernel
[18:28:09] <jepler> select a different kernel at the boot menu and then remove the virtualbox-dkms package
[18:30:07] <skunkworks> yay - that booted
[18:30:53] <skunkworks> should I try re-installing it?
[18:31:25] <skunkworks> too late
[18:32:51] <skunkworks> heh - the second It gets done building the kernel modules - it reboots
[18:32:56] <jepler> hm could be
https://www.virtualbox.org/ticket/11286 even though that's 3 years old
[18:32:57] <skunkworks> what kernel are you usuing?
[18:33:01] <jepler> 4.4-something
[18:33:05] <Tom_itx> dammit, where did it go..
[18:33:22] <jepler> probably 4.4+71~bpo8+1 from jessie-backports, but I can't check it right now for obvious reasons
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[18:34:26] <Tom_itx> storms must have knocked it off
[18:34:59] <skunkworks> jepler, but that isn't there anymore?
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[18:42:45] <jepler> that one's there at the moment. it's the 4.1.0-0.bpo.2 that they removed. they'll eventually remove the 4.4 one as well, when they go to kernel 4.5 or later in debian testing.
[18:42:50] <jepler> https://packages.debian.org/search?keywords=linux-image-rt-amd64
[18:42:57] <jepler> so it is not good to suggest in general to users :-/
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[19:33:30] <seb_kuzminsky> we could grab one and stick it in the deb archive at wlo
[19:44:13] <KGB-linuxcnc> 03Dewey Garrett 05joints_axes13 0786060 06linuxcnc 10lib/hallib/sim_lib.tcl sim_lib.tcl improve compatibility with twopass JA * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=0786060
[19:44:13] <KGB-linuxcnc> 03Dewey Garrett 05joints_axes13 4670057 06linuxcnc 10(44 files in 6 dirs) iocontrol-removed sim config: move to orphans JA * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=4670057
[19:44:13] <KGB-linuxcnc> 03Dewey Garrett 05joints_axes13 e339b4b 06linuxcnc 10(35 files in 10 dirs) configs/sim/axis/*.ini cleanups JA * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=e339b4b
[19:44:14] <KGB-linuxcnc> 03Dewey Garrett 05joints_axes13 4d34a39 06linuxcnc 10(70 files in 29 dirs) configs/sim/axis/* some subdirs cleanup JA * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=4d34a39
[19:44:18] <KGB-linuxcnc> 03Dewey Garrett 05joints_axes13 0126b46 06linuxcnc 10src/emc/ini/initraj.cc 10src/emc/usr_intf/axis/scripts/axis.py initraj.cc: report reason for failure JA * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=0126b46
[19:44:22] <KGB-linuxcnc> 03Dewey Garrett 05joints_axes13 bedae33 06linuxcnc 10src/emc/usr_intf/axis/scripts/axis.py axis.py message/exit if no [TRAJ]COORDINATES JA * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=bedae33
[19:44:26] <KGB-linuxcnc> 03Dewey Garrett 05joints_axes13 5417b04 06linuxcnc 10src/emc/usr_intf/axis/scripts/axis.py axis.py: fail if no [RS274NGC]PARAMETER_FILE JA * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=5417b04
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[21:17:20] <jepler> rebooted with non-rt kernel, virtualbox packages removed, no permanent harm done
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[21:23:39] <skunkworks_> zlog
[21:23:39] <zlog> skunkworks_: Log stored at
http://tom-itx.no-ip.biz:81/~tom-itx/irc/logs/%23linuxcnc-devel/2016-04-29.html
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[22:14:43] <jepler> skunkworks_: what gcode did you run to get the following error on ethernet with my branch?
[22:16:09] <skunkworks_> jepler, the splash screen does it. (it is the shuttles of the config are so high)
[22:16:34] <skunkworks_> if you jog the axis faster than a few hundred inches per minute - it does it too
[22:19:21] <jepler> OK, I'm not seeing that but I've modified my branch substantially compared to what you tested
[22:19:28] <jepler> I should go back to what you tested and see if I error there
[22:20:01] <jepler> oh yeah it ferrors right away there
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[22:34:09] <JT-JA13> yea moving things in JA
[22:49:07] <PCW> skunkworks_: assuming everything else is correct, you can get the lowest following error with tuning:
[22:49:08] <PCW> P= 1000 (at 1 ms servo thread) and FF2= seconds from position read to velocity write
[22:49:10] <PCW> P= 1/servo thread period is the same as what the driver tries to do (correct error in next period)
[22:50:52] <jepler> hm I seem to have written myself a 'fail after 2^16 cycles' bug too
[22:52:45] <skunkworks_> PCW, sure - I was just running the config you had created
[22:52:51] <PCW> it runs for a minute, ship-it!
[22:53:02] <jepler> hm2/hm2_7i92.0: error finishing read! iter=65541)
[22:53:09] <jepler> it's always an error on iter=65541
[22:53:11] <skunkworks_> it worked fine on master - not on jeplers branch
[22:53:28] <skunkworks_> (so it was jeplers fault) ;)
[22:53:37] <jepler> yeah I think the version skunkworks_ tested had a bug that meant it was always one one read response packet behind
[22:54:38] <PCW> Yeah almost anything will work for P, but if you are fussy you can get the errors < 5 u inch or so or so
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[22:55:27] <PCW> 5 more than 2^16?
[22:56:42] <jepler> PCW: yes
[22:57:02] <jepler> it's because things go wrong starting at 2^16 and the error counter takes 5 increments to reach its limit
[22:57:07] <jepler> and I think I just spotted it, hopefully
[22:58:42] <jepler> yup that must have been it
[23:00:14] <jepler> .. because I'm not doing anything at the other layers of linuxcnc, a .1% packet loss still causes following errors very readily
[23:01:12] <PCW> One thing ive though would be a good idea is some sanity checking of the RX packet (like always reading the HM2 cookie as the last read)
[23:01:14] <PCW> though I guess if there is RX packet sequence checking that does pretty much the same thing
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[23:03:55] <PCW> I would think ( perhaps naively ) that is the following error was wider than velocity*servo_period that a single packet loss would not cause a following error
[23:04:05] <PCW> that if the
[23:05:56] <jepler> https://emergent.unpythonic.net/files/sandbox/ferror-after-lost-packet.png
[23:06:46] <jepler> the offset between command and fb is because both were in "ac couple" mode so their offsets differ
[23:08:11] <jepler> by "merely" opening up ferror by a factor of 10, no more ferrors
[23:08:27] <PCW> what velocity?
[23:09:29] <jepler> I think 1200in/min
[23:10:00] <jepler> when a packet goes astray, position-fb ends up being held for 1ms, which gives a PID / following error of +-.02
[23:10:11] <PCW> right
[23:10:52] <jepler> so opening FERROR up from .005 to .05 suffices
[23:11:15] <andypugh> F-error may only need to be a big as limit to hard stop dimension. :-)
[23:12:35] <jepler> when 2 packets in a row go missing, ferror goes up to +-.04
[23:12:44] <jepler> so ferror of 0.5 would give you "fail after 3 lost packets in a row"
[23:13:18] <jepler> er, 0.05
[23:14:14] <PCW> of course for velocity mode and the stepgen, the actual error is much less (and accel dependent)
[23:14:31] <jepler> yes
[23:15:44] <jepler> my captures have tended to be in the cruise phase of a long rapid move
[23:15:52] <PCW> you sort of want a "dont check ferror" input to motion if it were not such a effective foot gun
[23:16:15] <andypugh> seb_kuzminsky: Where are we with
https://github.com/LinuxCNC/linuxcnc/pull/55 ?
[23:17:24] <andypugh> They are talking CNC Glue-Guns on the other channel.
[23:18:48] <KGB-linuxcnc> 03Jeff Epler 05jepler/master/eth-packet-loss e98788c 06linuxcnc 10docs/man/man9/hm2_eth.9 10src/hal/drivers/mesa-hostmot2/hm2_eth.c 10src/hal/drivers/mesa-hostmot2/hm2_eth.h hm2_eth: detect lost reads and writes * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=e98788c
[23:18:48] <KGB-linuxcnc> 03Jeff Epler 05jepler/master/eth-packet-loss 0bc365a 06linuxcnc 10src/hal/drivers/mesa-hostmot2/hm2_eth.c 10src/hal/drivers/mesa-hostmot2/hm2_eth.h hm2_eth: fix array-vs-pointer thinko * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=0bc365a
[23:18:48] <KGB-linuxcnc> 03Jeff Epler 05jepler/master/eth-packet-loss 546f823 06linuxcnc 10src/hal/drivers/mesa-hostmot2/lbp16.h hm2_eth: make macros more robust * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=546f823
[23:18:52] <KGB-linuxcnc> 03Jeff Epler 05jepler/master/eth-packet-loss 3fd1907 06linuxcnc 10src/hal/drivers/mesa-hostmot2/hm2_eth.c 10src/hal/drivers/mesa-hostmot2/hm2_eth.h hm2_eth: read-request-packet is not just a sequence of lbp16_cmd_addr * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=3fd1907
[23:18:56] <KGB-linuxcnc> 03Jeff Epler 05jepler/master/eth-packet-loss 9efa581 06linuxcnc 10src/hal/drivers/mesa-hostmot2/hm2_eth.c 10src/hal/drivers/mesa-hostmot2/hm2_eth.h 10src/hal/drivers/mesa-hostmot2/lbp16.h hm2_eth: detect late read packets * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=9efa581
[23:19:19] <jepler> skunkworks_: if you feel like it, I think this branch is worth testing again. let me know.
[23:19:22] <jepler> afk for dinner
[23:48:58] <seb_kuzminsky> andypugh: i couldn't get it to build on RTAI or uspace, and the OP never responded to my questions about his build environment
[23:54:19] <skunkworks_> jepler, I will this weekend
[23:54:21] <skunkworks_> thanks
[23:56:42] -!- kingarmadillo has quit [Ping timeout: 260 seconds]
[23:56:56] <andypugh> seb_kuzminsky: I will chase him
