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[00:32:40] <jepler> PCW: did you identify any problems with my branch? does it cover what you wanted to see in 2.7?
[00:33:02] <jepler> seb_kuzminsky: if PCW feels good about it, how do you feel about me pushing it to 2.7? (jepler/hm2-eth-packetreduction)
[00:33:21] <PCW> no new problems
[00:33:43] <KGB-linuxcnc> 03Jeff Epler 05jepler/elbpcom 45cf42e 06linuxcnc 03docs/man/man1/elbpcom.1 10src/hal/utils/Submakefile 03src/hal/utils/elbpcom.py elpbcom: communicate directly with mesa ethernet cards * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=45cf42e
[00:33:50] <PCW> found a problem but master has the same issue
[00:34:12] <jepler> also for your review I put my elbpcom on another independent branch
[00:34:40] <PCW> Great, Ill try it when i get a chance
[00:35:02] <PCW> trying to track down a crash bug
[00:35:21] <jepler> ugh, want me to try reproducing it here?
[00:35:52] <PCW> probably need to wait until Ive narrowed it down a bit
[00:36:34] <PCW> resolver and DPLL in same config = crash
[00:36:56] <PCW> need to try on PCI first
[00:37:08] <jepler> ok, I wouldn't have a firmware to test with anyhow
[00:37:37] <jepler> you can attach gdb to rtapi_app, which will let you stop at the crash site. as long as you don't mind totally missing all your realtime deadlines.
[00:37:58] <jepler> depends if you're the type who likes debuggers or printfs :-P
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[00:40:20] <PCW> freeby.mesanet.com/7i80hd_16_rmesvss6_6d.bit crash
[00:40:22] <PCW> freeby.mesanet.com/7i80hd_16_rmesvss6_6.bit no crash
[00:41:08] <PCW> but I probably need to make a 5i23 of other PCI card version to see if its hm2_eth specific
[00:41:29] <PCW> and I'm burnt out for today
[00:41:41] <jepler> see ya
[00:42:48] <PCW> time for dinner and a nice dog walk
[00:42:53] <PCW> bbl
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[01:06:02] <KGB-linuxcnc> 03Chris Morley 052.7 89dbd1b 06linuxcnc 10src/emc/usr_intf/pncconf/pncconf.py pncconf -fix sserial combobox not select-able * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=89dbd1b
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[01:48:58] <seb_kuzminsky> jepler: in "hostmot2: split hm2_finish_write from hm2_tram_write", it's weird to me that you move the tram_write_iteration++ out of hm2_tram_write(), but i guess it doesn't substantially change the behavior
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[01:52:49] <seb_kuzminsky> jepler: in "hm2_eth: In realtime context, complain about llio->read", do you want a similar warning for llio->write?
[01:53:09] <seb_kuzminsky> other than those minor nitpicks, looks fine for 2.7
[02:04:04] <jepler> seb_kuzminsky: I can move the increment to a more sensible place
[02:04:21] <jepler> seb_kuzminsky: llio->read becomes a complaint, llio->write becomes llio->queue_write
[02:05:07] <jepler> seb_kuzminsky: llio->read has to be satisfied immediately, while I think all llio->writes can safely be queued as long as we fire the pending writes before finishing the hal function
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[02:05:12] <jepler> seb_kuzminsky: thanks for the review.
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[02:22:53] <KGB-linuxcnc> 03Jeff Epler 05jepler/hm2-eth-packetreduction 1ff8d47 06linuxcnc 03docs/man/man3/rtapi_task_self.3rtapi 10src/rtapi/rtapi.h rtapi: document that rtapi_task_self may be called from init/cleanup * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=1ff8d47
[02:22:53] <KGB-linuxcnc> 03Jeff Epler 05jepler/hm2-eth-packetreduction e1811b5 06linuxcnc 10src/rtapi/rtapi_uspace.hh 10src/rtapi/uspace_rtapi_app.cc uspace: implement rtapi_task_self * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=e1811b5
[02:22:53] <KGB-linuxcnc> 03Jeff Epler 05jepler/hm2-eth-packetreduction 68aed55 06linuxcnc 10src/hal/drivers/mesa-hostmot2/hm2_eth.c hm2_eth: In realtime context, complain about llio->read * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=68aed55
[02:22:56] <KGB-linuxcnc> 03Jeff Epler 05jepler/hm2-eth-packetreduction 7725e39 06linuxcnc 10src/hal/drivers/mesa-hostmot2/encoder.c hm2: encoder: use already-read latch register * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=7725e39
[02:23:00] <KGB-linuxcnc> 03Jeff Epler 05jepler/hm2-eth-packetreduction b1d6518 06linuxcnc 10src/hal/drivers/mesa-hostmot2/hostmot2.c 10src/hal/drivers/mesa-hostmot2/hostmot2.h 10src/hal/drivers/mesa-hostmot2/tram.c hostmot2: split hm2_finish_write from hm2_tram_write * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=b1d6518
[02:23:05] <KGB-linuxcnc> 03Jeff Epler 05jepler/hm2-eth-packetreduction 6b52f68 06linuxcnc 10src/hal/drivers/mesa-hostmot2/hm2_eth.c hm2_eth: in realtime context, queue all writes * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=6b52f68
[02:23:10] <KGB-linuxcnc> 03Jeff Epler 05jepler/hm2-eth-packetreduction 63704a3 06linuxcnc 10src/hal/drivers/mesa-hostmot2/hostmot2.c 10src/hal/drivers/mesa-hostmot2/hostmot2.h 10src/hal/drivers/mesa-hostmot2/tram.c hostmot2: split hm2_finish_read from hm2_tram_read * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=63704a3
[02:23:15] <KGB-linuxcnc> 03Jeff Epler 05jepler/hm2-eth-packetreduction 4a1b81d 06linuxcnc 10src/hal/drivers/mesa-hostmot2/hostmot2.c 10src/hal/drivers/mesa-hostmot2/hostmot2.h 10src/hal/drivers/mesa-hostmot2/raw.c hostmot2: make 'raw' queue its read * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=4a1b81d
[02:23:19] <KGB-linuxcnc> 03Jeff Epler 05jepler/hm2-eth-packetreduction 1e7a4d2 06linuxcnc 10src/hal/drivers/mesa-hostmot2/hostmot2.c 10src/hal/drivers/mesa-hostmot2/hostmot2.h 10src/hal/drivers/mesa-hostmot2/tp_pwmgen.c hostmot2: make tp_pwmgen use queue_read * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=1e7a4d2
[02:23:24] <KGB-linuxcnc> 03Jeff Epler 05jepler/hm2-eth-packetreduction 067b8f7 06linuxcnc 10docs/man/man9/hm2_eth.9 10src/hal/drivers/mesa-hostmot2/resolver.c 10src/hal/drivers/mesa-hostmot2/uart.c hostmot2: comment about functions that don't work well on hm2_eth * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=067b8f7
[02:23:29] <KGB-linuxcnc> 03Jeff Epler 05jepler/hm2-eth-packetreduction 6246ac6 06linuxcnc 10src/hal/drivers/mesa-hostmot2/ioport.c hostmot2: comment on a llio->read that doesn't hurt hm2 * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=6246ac6
[02:23:33] <KGB-linuxcnc> 03Jeff Epler 05jepler/hm2-eth-packetreduction da07d64 06linuxcnc 10docs/man/man9/hm2_eth.9 hm2_eth: note some LED gotchas * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=da07d64
[02:57:16] <jepler> huh, the wolfram "rule 30" CA makes a not-bad PRNG. Apparently it has long been used in Mathematica for that purpose.
[02:59:04] <jepler> I didn't find an exact description of the Mathematica algorithm, but my program runs rule 30 in a 64-bit circular buffer starting with a single "1" bit; the output of the RNG is each successive value of bit 0 of the buffer after applying the CA rule
[03:00:06] <jepler> it failes .07% of rngtest (FIPS) tests, which is comparable to /dev/urandom
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[03:20:15] <jepler> ooh it's bedtime
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[13:21:32] <jepler> zlog:
[13:21:33] <zlog> jepler: Log stored at
http://tom-itx.no-ip.biz:81/~tom-itx/irc/logs/%23linuxcnc-devel/2015-04-19.html
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[14:39:00] <jepler> pcw_home: I reproduced the crash
[14:39:14] <jepler> unfortunately the debugger fails to furnish line-number information
[14:39:20] <jepler> Program received signal SIGSEGV, Segmentation fault.
[14:39:21] <jepler> [Switching to Thread 0x7f92391d6700 (LWP 4667)]
[14:39:21] <jepler> 0x00007f9237695f9e in ?? () from /usr/lib/linuxcnc/modules/hostmot2.so
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[14:40:03] <pcw_home> Yeah Didnt yet try on PCI (need to buld a resolver/DPLL config)
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[14:40:45] <jepler> ah there it is
[14:40:47] <jepler> 0x00007fc3947abf0e in hm2_stepgen_write (hm2=hm2@entry=0x19d2260)
[14:40:47] <jepler> at hal/drivers/mesa-hostmot2/stepgen.c:436
[14:40:47] <jepler> 436 if (*hm2->stepgen.hal->pin.dpll_timer_num != hm2->stepgen.written_dpll_timer_num) {
[14:43:12] <jepler> I should have a patch to test in 5
[14:43:42] <pcw_home> is it a bug with configs with dpll but no stepgens?
[14:43:58] <pcw_home> Didnt think of that possibility
[14:45:42] <jepler> the pin ...stepgen.timer-number doesn't exist but the C code dereferences the associated pointer pin.dpll_timer_num
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[14:46:20] <pcw_home> oops
[14:47:53] <KGB-linuxcnc> 03Jeff Epler 05jepler/hm2-resolver-no-stepgen eb5f2c7 06linuxcnc 10src/hal/drivers/mesa-hostmot2/stepgen.c hostmot2: don't crash with DPLL and no stepgen * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=eb5f2c7
[14:47:57] <pcw_home> All the configs ive been testing with have had stepgens
[14:47:59] <pcw_home> I guess I need test with things missing insead of just adding more modules
[14:48:40] <pcw_home> i wonder if the necoder module has the same issue
[14:50:04] <jepler> hostmot2 encoder.c doesn't have any references to pll
[14:50:09] <jepler> abs_encoder has
[14:50:38] <jepler> // If there is no dpll to link to, then we export the trigger function.
[14:50:41] <pcw_home> ahh maybe thats only in master
[14:51:16] <jepler> oh yes, I'm looking in 2.7.
[14:51:35] <pcw_home> I tested dpll encoder sampling it so I know its somewhere...
[14:53:39] <jepler> maybe I'm not grepping for the right things, but I don't see it in master either
[14:54:14] <pcw_home> maybe it was only a patch
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[15:10:15] <jepler> if so it would be good to dig it back up and get it in master
[15:10:30] <jepler> or maybe even 2.7 if it's important for ethernet performance
[15:16:25] <pcw_home> Yeah I though it was merged :-(
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[16:00:36] <jepler> huh clang (3.5) gets 1/3 the performance of gcc (4.9) on this code. but clang 3.7 is closer, only 10% slower
[16:06:30] <pcw_home> Thats a huge speed change between versions
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[16:48:26] <jepler> I think I'm hitting this clang optimizer shortcoming
https://llvm.org/bugs/show_bug.cgi?id=17332
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[16:56:06] <jepler> which as the last comment says is basically fixed now
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[17:12:50] <KGB-linuxcnc> 03Jeff Epler 052.7 21a083f 06linuxcnc Merge branch 'jepler/hm2-eth-packetreduction' into 2.7 * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=21a083f
[17:12:50] <KGB-linuxcnc> 03Jeff Epler 052.7 35cc7e2 06linuxcnc Merge branch 'jepler/hm2-resolver-no-stepgen' into 2.7 * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=35cc7e2
[17:12:50] <KGB-linuxcnc> 03Jeff Epler 052.7 f3fc602 06linuxcnc Merge branch 'jepler/elbpcom' into 2.7 * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=f3fc602
[17:12:51] <KGB-linuxcnc> 03Jeff Epler 052.7 e868776 06linuxcnc 10docs/man/man9/hm2_eth.9 hm2_eth: it's our elbpcom program now * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=e868776
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[17:40:53] <pcw_home> Yay!
[17:49:55] <skunkworks> Neat!
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[18:02:19] <pcw_home> elbpcom 01D91A00025A01C92800000001420001
[18:02:21] <pcw_home> to set the 7i 80/92/93/76e LEDs to hostmot2 permanently
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[21:47:01] <seb_kuzminsky> pcw_home: that thing that jeff just fixed, was that the 2.7 blocker that you were telling me about before?
[21:48:45] <pcw_home> Yeah, it pretty much broke using index with hm2_eth so was serious (as was the just discovered no stepgen but dpll bug)
[21:50:05] <pcw_home> I'd like to get the encoder sampled by dpll patch in but I may be optimistically remembering it as having been done
[21:50:07] <seb_kuzminsky> ok, so the original problem is fixed, but there's a new thing with stepgen but no dpll that needs to be fixed before 2.7, is that right?
[21:50:29] <pcw_home> Jeff fixed that also
[21:50:41] <seb_kuzminsky> oh wow
[21:50:46] <seb_kuzminsky> the man is on fire today
[21:50:48] <pcw_home> the probal was dpll but no stepgen
[21:50:54] <pcw_home> problem
[21:51:16] <pcw_home> yeah lots of fixes
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[21:56:41] <pcw_home> I have a lot of time in hm2-testing (more that a year 24/7) but not much breadth if configs
[21:56:59] <pcw_home> hm2-eth testing I mean
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[21:58:16] <seb_kuzminsky> that's how testing goes, often times
[21:58:37] <seb_kuzminsky> thus software works well in certain narrow code paths, and is buggy outside those well-tested code paths
[21:58:56] <pcw_home> well its a lot more work to try different configs than just rack up hours
[22:00:29] <seb_kuzminsky> it sure is
[22:00:53] <seb_kuzminsky> at my dayjob we have a roughly 50/50 split between folks writing product code and folks writing new tests of the product
[22:02:11] <seb_kuzminsky> and we still find tons of bugs when we extend the breadth of testing
[22:02:33] <pcw_home> Yeah I can easily see that
[22:03:55] <pcw_home> I had ablind spot where I thought the problem was likely a combination of modules,
[22:03:57] <pcw_home> not hidden assumptions in the code that a module is always there
[22:10:19] <pcw_home> I didn't expect that the most common problems people have with hm2_eth are basic network setup related
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[22:47:06] <skunkworks> I have done it before and it still takes me a couple of tries to get it right
[22:52:36] <pcw_home> maybe some kind of a setup script is needed
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