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[00:08:38] <linuxcnc-build_> build #3244 of 1300.rip-precise-i386 is complete: Failure [4failed compile] Build details are at
http://buildbot.linuxcnc.org/buildbot/builders/1300.rip-precise-i386/builds/3244 blamelist: Jeff Epler <jepler@unpythonic.net>
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[00:09:46] <linuxcnc-build_> build #3246 of 1306.rip-precise-amd64 is complete: Failure [4failed compile] Build details are at
http://buildbot.linuxcnc.org/buildbot/builders/1306.rip-precise-amd64/builds/3246 blamelist: Jeff Epler <jepler@unpythonic.net>
[00:09:49] <linuxcnc-build_> build #3245 of 1200.rip-lucid-i386 is complete: Failure [4failed compile] Build details are at
http://buildbot.linuxcnc.org/buildbot/builders/1200.rip-lucid-i386/builds/3245 blamelist: Jeff Epler <jepler@unpythonic.net>
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[00:30:56] <linuxcnc-build_> build #3245 of 1202.rip-lucid-amd64 is complete: Failure [4failed compile] Build details are at
http://buildbot.linuxcnc.org/buildbot/builders/1202.rip-lucid-amd64/builds/3245 blamelist: Jeff Epler <jepler@unpythonic.net>
[00:33:14] <linuxcnc-build_> build #1405 of 1403.rip-wheezy-amd64 is complete: Failure [4failed compile] Build details are at
http://buildbot.linuxcnc.org/buildbot/builders/1403.rip-wheezy-amd64/builds/1405 blamelist: Jeff Epler <jepler@unpythonic.net>
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[00:34:46] <linuxcnc-build_> build #1596 of 1404.rip-wheezy-rtpreempt-amd64 is complete: Failure [4failed compile] Build details are at
http://buildbot.linuxcnc.org/buildbot/builders/1404.rip-wheezy-rtpreempt-amd64/builds/1596 blamelist: Jeff Epler <jepler@unpythonic.net>
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[00:35:55] <linuxcnc-build_> build #1404 of 1400.rip-wheezy-i386 is complete: Failure [4failed compile] Build details are at
http://buildbot.linuxcnc.org/buildbot/builders/1400.rip-wheezy-i386/builds/1404 blamelist: Jeff Epler <jepler@unpythonic.net>
[00:37:18] <linuxcnc-build_> build #915 of 1402.rip-wheezy-rtpreempt-i386 is complete: Failure [4failed compile] Build details are at
http://buildbot.linuxcnc.org/buildbot/builders/1402.rip-wheezy-rtpreempt-i386/builds/915 blamelist: Jeff Epler <jepler@unpythonic.net>
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[01:02:18] <linuxcnc-build_> build #3255 of 0000.checkin is complete: Failure [4failed] Build details are at
http://buildbot.linuxcnc.org/buildbot/builders/0000.checkin/builds/3255 blamelist: Jeff Epler <jepler@unpythonic.net>
[01:05:40] <linuxcnc-build_> build #3249 of 1201.rip-lucid-rtai-i386 is complete: Failure [4failed compile] Build details are at
http://buildbot.linuxcnc.org/buildbot/builders/1201.rip-lucid-rtai-i386/builds/3249 blamelist: Jeff Epler <jepler@unpythonic.net>
[01:07:36] <linuxcnc-build_> build #399 of 1902.clang-wheezy-rtai-i386 is complete: Failure [4failed compile] Build details are at
http://buildbot.linuxcnc.org/buildbot/builders/1902.clang-wheezy-rtai-i386/builds/399 blamelist: Jeff Epler <jepler@unpythonic.net>
[01:10:14] <seb_kuzminsky> jepler: buried in all that noise is this build failure in jepler/hal-streams:
http://buildbot.linuxcnc.org/buildbot/builders/1902.clang-wheezy-rtai-i386/builds/399/steps/compile/logs/stdio
[01:13:21] <linuxcnc-build_> build #1068 of 1401.rip-wheezy-rtai-i386 is complete: Failure [4failed compile] Build details are at
http://buildbot.linuxcnc.org/buildbot/builders/1401.rip-wheezy-rtai-i386/builds/1068 blamelist: Jeff Epler <jepler@unpythonic.net>
[01:13:46] <linuxcnc-build_> build #2449 of 1301.rip-precise-rtai-i386 is complete: Failure [4failed compile] Build details are at
http://buildbot.linuxcnc.org/buildbot/builders/1301.rip-precise-rtai-i386/builds/2449 blamelist: Jeff Epler <jepler@unpythonic.net>
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[01:30:44] <linuxcnc-build_> build #3256 of 0000.checkin is complete: Failure [4failed] Build details are at
http://buildbot.linuxcnc.org/buildbot/builders/0000.checkin/builds/3256 blamelist: Jeff Epler <jepler@unpythonic.net>
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[02:13:10] <jepler> seb_kuzminsky: thanks
[02:15:47] <jepler> .. should be a call to rtapi_delay instead
[02:38:23] <KGB-linuxcnc> 03Jeff Epler 05jepler/hal-streams a1e8bfe 06linuxcnc 10(9 files in 3 dirs) hal: factor out streamer/sampler * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=a1e8bfe
[02:38:23] <KGB-linuxcnc> 03Jeff Epler 05jepler/hal-streams 735a747 06linuxcnc 03docs/man/man3/rtapi_stream.3rtapi hal: document the new C API * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=735a747
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[02:47:12] <seb_kuzminsky> jepler: also something went wrong with jepler/aarch64 on uspace machines:
http://buildbot.linuxcnc.org/buildbot/builders/1403.rip-wheezy-amd64/builds/1405/steps/compile/logs/stdio
[02:47:23] <seb_kuzminsky> not trying to nag, just wanted to make sure you saw it
[02:52:53] <jepler> seb_kuzminsky: I'll look into that too
[02:53:22] <jepler> tomorrow
[02:53:34] <jepler> hm did I fail to commit the change to configure.in ?
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[03:10:21] <seb_kuzminsky> has anyone heard from JT lately? is he done with his docs updates?
[03:10:38] <archivist> he is on holiday
[03:13:30] <archivist> he is dropping in the other chan under various location related nicks 2015-07-12 18:50:42 jt-alyeska That's where we are
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[05:38:32] <linuxcnc-build_> build #403 of 1902.clang-wheezy-rtai-i386 is complete: Failure [4failed compile] Build details are at
http://buildbot.linuxcnc.org/buildbot/builders/1902.clang-wheezy-rtai-i386/builds/403 blamelist: dummy, Jeff Epler <jepler@unpythonic.net>
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[06:17:13] <linuxcnc-build_> build #2453 of 1301.rip-precise-rtai-i386 is complete: Failure [4failed compile] Build details are at
http://buildbot.linuxcnc.org/buildbot/builders/1301.rip-precise-rtai-i386/builds/2453 blamelist: dummy, Jeff Epler <jepler@unpythonic.net>
[06:24:58] <linuxcnc-build_> build #3253 of 1201.rip-lucid-rtai-i386 is complete: Failure [4failed compile] Build details are at
http://buildbot.linuxcnc.org/buildbot/builders/1201.rip-lucid-rtai-i386/builds/3253 blamelist: dummy, Jeff Epler <jepler@unpythonic.net>
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[06:35:44] <linuxcnc-build_> build #1072 of 1401.rip-wheezy-rtai-i386 is complete: Failure [4failed compile] Build details are at
http://buildbot.linuxcnc.org/buildbot/builders/1401.rip-wheezy-rtai-i386/builds/1072 blamelist: dummy, Jeff Epler <jepler@unpythonic.net>
[06:47:09] <linuxcnc-build_> build #3260 of 0000.checkin is complete: Failure [4failed] Build details are at
http://buildbot.linuxcnc.org/buildbot/builders/0000.checkin/builds/3260 blamelist: dummy, Jeff Epler <jepler@unpythonic.net>
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[11:44:06] <jepler> hm, no, rtapi_delay isn't available in ULAPI..
[11:47:26] <KGB-linuxcnc> 03Jeff Epler 05jepler/hal-streams 7ca658a 06linuxcnc 10(10 files in 3 dirs) hal: factor out streamer/sampler * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=7ca658a
[11:47:26] <KGB-linuxcnc> 03Jeff Epler 05jepler/hal-streams 97ef8ef 06linuxcnc 03docs/man/man3/rtapi_stream.3rtapi hal: document the new C API * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=97ef8ef
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[11:51:41] <KGB-linuxcnc> 03Jeff Epler 05jepler/aarch64 aa18ad4 06linuxcnc 10src/configure.in 10src/rtapi/rtapi_io.h 10src/rtapi/rtapi_pci.cc 10src/rtapi/uspace_rtapi_app.cc rtapi: accommodate systems without sys/io.h * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=aa18ad4
[11:51:41] <KGB-linuxcnc> 03Jeff Epler 05jepler/aarch64 f1c84aa 06linuxcnc 10src/Makefile 10src/Makefile.modinc.in build: remove unused IS_POWERPC * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=f1c84aa
[11:55:07] <linuxcnc-build_> build #3254 of 1201.rip-lucid-rtai-i386 is complete: Failure [4failed compile] Build details are at
http://buildbot.linuxcnc.org/buildbot/builders/1201.rip-lucid-rtai-i386/builds/3254 blamelist: dummy, Jeff Epler <jepler@unpythonic.net>
[11:58:37] <linuxcnc-build_> build #1073 of 1401.rip-wheezy-rtai-i386 is complete: Failure [4failed compile] Build details are at
http://buildbot.linuxcnc.org/buildbot/builders/1401.rip-wheezy-rtai-i386/builds/1073 blamelist: dummy, Jeff Epler <jepler@unpythonic.net>
[11:59:25] <KGB-linuxcnc> 03Jeff Epler 05jepler/hal-streams d116f3c 06linuxcnc 10(10 files in 3 dirs) hal: factor out streamer/sampler * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=d116f3c
[11:59:25] <KGB-linuxcnc> 03Jeff Epler 05jepler/hal-streams d6a73ca 06linuxcnc 03docs/man/man3/rtapi_stream.3rtapi hal: document the new C API * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=d6a73ca
[11:59:50] <linuxcnc-build_> build #2454 of 1301.rip-precise-rtai-i386 is complete: Failure [4failed compile] Build details are at
http://buildbot.linuxcnc.org/buildbot/builders/1301.rip-precise-rtai-i386/builds/2454 blamelist: dummy, Jeff Epler <jepler@unpythonic.net>
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[12:07:35] <linuxcnc-build_> build #404 of 1902.clang-wheezy-rtai-i386 is complete: Failure [4failed compile] Build details are at
http://buildbot.linuxcnc.org/buildbot/builders/1902.clang-wheezy-rtai-i386/builds/404 blamelist: dummy, Jeff Epler <jepler@unpythonic.net>
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[12:13:08] <jepler> huh, apparently clang rtai builds usually have piles of messages that say "error", but they are not actually fatal errors e.g.,
[12:13:11] <jepler> /usr/src/linux-headers-3.4-9-common-rtai/arch/x86/include/asm/thread_info.h:190:24: error: global register variables are not supported
[12:13:14] <jepler> register unsigned long current_stack_pointer asm("esp") __used;
[12:13:17] <jepler> ^/usr/src/linux-headers-3.4-9-common-rtai/arch/x86/include/asm/thread_info.h:190:24: error: global register variables are not supported
[12:13:20] <jepler> register unsigned long current_stack_pointer asm("esp") __used;
[12:15:48] <linuxcnc-build_> build #3261 of 0000.checkin is complete: Failure [4failed] Build details are at
http://buildbot.linuxcnc.org/buildbot/builders/0000.checkin/builds/3261 blamelist: dummy, Jeff Epler <jepler@unpythonic.net>
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[13:29:18] <linuxcnc-build_> build #406 of 1902.clang-wheezy-rtai-i386 is complete: Failure [4failed compile] Build details are at
http://buildbot.linuxcnc.org/buildbot/builders/1902.clang-wheezy-rtai-i386/builds/406 blamelist: dummy, Jeff Epler <jepler@unpythonic.net>
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[13:50:16] <jepler> this time I can't spot the real error
[13:51:04] <linuxcnc-build_> build #2456 of 1301.rip-precise-rtai-i386 is complete: Failure [4failed compile] Build details are at
http://buildbot.linuxcnc.org/buildbot/builders/1301.rip-precise-rtai-i386/builds/2456 blamelist: dummy, Jeff Epler <jepler@unpythonic.net>
[13:52:26] <linuxcnc-build_> build #3252 of 1300.rip-precise-i386 is complete: Failure [4failed compile runtests] Build details are at
http://buildbot.linuxcnc.org/buildbot/builders/1300.rip-precise-i386/builds/3252 blamelist: dummy, Jeff Epler <jepler@unpythonic.net>
[13:52:52] <linuxcnc-build_> build #3254 of 1306.rip-precise-amd64 is complete: Failure [4failed compile runtests] Build details are at
http://buildbot.linuxcnc.org/buildbot/builders/1306.rip-precise-amd64/builds/3254 blamelist: dummy, Jeff Epler <jepler@unpythonic.net>
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[14:08:13] <linuxcnc-build_> build #3256 of 1201.rip-lucid-rtai-i386 is complete: Failure [4failed compile] Build details are at
http://buildbot.linuxcnc.org/buildbot/builders/1201.rip-lucid-rtai-i386/builds/3256 blamelist: dummy, Jeff Epler <jepler@unpythonic.net>
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[14:17:01] <linuxcnc-build_> build #1075 of 1401.rip-wheezy-rtai-i386 is complete: Failure [4failed compile] Build details are at
http://buildbot.linuxcnc.org/buildbot/builders/1401.rip-wheezy-rtai-i386/builds/1075 blamelist: dummy, Jeff Epler <jepler@unpythonic.net>
[14:28:55] <linuxcnc-build_> build #3263 of 0000.checkin is complete: Failure [4failed] Build details are at
http://buildbot.linuxcnc.org/buildbot/builders/0000.checkin/builds/3263 blamelist: dummy, Jeff Epler <jepler@unpythonic.net>
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[15:55:50] <KGB-linuxcnc> 03Jeff Epler 05jepler/hal-streams b3afc5e 06linuxcnc 10(10 files in 3 dirs) hal: factor out streamer/sampler * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=b3afc5e
[15:55:50] <KGB-linuxcnc> 03Jeff Epler 05jepler/hal-streams 9b87adf 06linuxcnc 03docs/man/man3/rtapi_stream.3rtapi hal: document the new C API * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=9b87adf
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[16:44:20] <jepler> pcw_home: I have a 7i92 from a pile of boards you sent to cradek. as far as I can see, there are no jumpers W5/W6 for controlling IP address selection. They're not by the power input block as shown in the pdf. did I get an early revision that omitted them?
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[16:46:29] <pcw_home> Yes, senior moment during schematic capture...
[16:46:55] <jepler> OK, I'll stop looking
[16:46:57] <pcw_home> it works, you just can't set the IP address mode
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[16:48:17] <pcw_home> (well you can by changing bitfile to have pullups or pulldowns on the pins that were supposed to read the jumpers)
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[16:53:30] <Tom_itx> pcw_home, incidentally i was trying to find those ISL32274 online and none of the vendors stock them. Would it be possible to get those and that other act04 from you some time so i can repair this 7i47s as a backup?
[16:54:03] <Tom_itx> i'd be more than happy to pay for em
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[17:00:08] <jepler> pcw_home: in 7i92man page 25 and 7i80dbman page 27, the command to change the eeprom ip address is given as 82C9200072000A8C0. On a later page, a different command is given: 82C920000100a8C0
[17:00:17] <jepler> the IP addresses are different, but i think the first one has had a spurious "7" inserted
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[17:10:44] <pcw_home> yeah wrong length
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[17:15:20] <jepler> http://paste.ubuntu.com/11873365/
[17:16:51] <jepler> ^^ two hm2_eth cards on one hardware interface
[17:21:58] amnesic is now known as amnesic_away
[17:22:39] <jepler> I don't immediately see a way to send both read requests and then wait for both of them, which is a pity.
[17:23:02] <jepler> surprising to me is that the variability of the second read function is higher
http://emergent.unpythonic.net/files/sandbox/hm2-eth-multiple.png
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[17:39:19] <skunkworks> is that through a switch?
[17:44:23] <jepler> skunkworks: yes, PC to gigabit switch to 2x7i90s
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[17:58:25] <skunkworks> cool
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[18:07:08] <PCW> That's neat (though to gain the most advantage from the switch as a concentrator you need to send the N read requests and then wait for the N responses)
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[18:08:44] <PCW> well sending all the requests and then waiting on them in sequence is probably good enough
[18:09:23] <PCW> allowing most of the response/wire times to overlap
[18:09:38] <PCW> (100BT wire times that is)
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[18:12:16] <PCW> My test setup has been up about 3 weeks now at 3 KHz though the switch (my $20 switch was TPLink not DLink, basically bottom of the barrel)
[18:13:30] <jepler> yeah I'm working on that but something's wonky
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[18:18:08] <PCW> Not surprising, its not simple...
[18:20:00] <PCW> if the scatter/gather can be made to work, it may actually be a case where receive interrupt coalescing helps performance
[18:21:41] <PCW> (since the response packets will come very close together on the 1G link)
[18:22:29] <jepler> pcw_home: should hostmot2 stepgen position feedback be 0 at powerup?
[18:22:51] <jepler> or is the position undefined?
[18:23:17] <PCW> I think it would default to that
[18:25:11] <PCW> you can write it with any value
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[18:29:07] <PCW> Its not specifically initialized in the VHDL but the default for uninitialized registers is 0
[18:30:12] <jepler> in that first halcmd show I pastebinned, the stepgen position-fbs were all 0 as expected
[18:31:34] <jepler> in my working version where I am overlapping the reads it looks like the "power-on" value is different and nonzero on each run, though commanding a position seems to work
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[18:32:46] <PCW> hmm, an errant write to the rate registers might cause that
[18:33:30] <PCW> (they also default to 0 but are not readable)
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[18:36:14] <PCW> I dont know if the driver clears the position register at linuxcnc startup (so a full power cycle would be needed for the actual position registers to be cleared)
[18:36:36] <PCW> (7I80 power cycle)
[18:39:41] <jepler> a little more testing and it is clear that it's something to do with my overlapped read code
[18:39:55] <jepler> reverting just that part makes the stepgens be at 0 at linuxcnc startup
[18:41:06] <PCW> random numbers?
[18:44:12] <PCW> maybe read the cookie at the end of the read request as an alignment sanity check
[18:45:13] <jepler> some of the .position-fb vary widely from run to run, others are rather stable
[18:45:24] <jepler> http://paste.debian.net/282003/
[18:45:30] <PCW> weird...
[18:46:17] <jepler> I am assuming I am either managing to read uninitialized memory, or read from the other packet. I'll figure it out after lunch.
[18:46:35] <PCW> Yeah
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[18:47:51] <PCW> adding alignment and sequence checks might not be a bad idea to help debug these types of issues
[18:53:00] <jepler> hm2_eth: enqueue_read ERROR: reading packet: recv() -> -1 Resource temporarily unavailable (expected to read 116 bytes)
[18:53:12] <jepler> ah well this would explain why the numbers are nonsense
[18:53:17] <jepler> .. it happens just once at startup
[18:53:57] <PCW> ahh first transfer is bolluxed-up
[18:55:23] <mozmck> Is there a way to show the state of a pin using gladevcp whether it is tied to a signal or not?
[18:55:33] <mozmck> The way halshow does it...
[18:57:08] <PCW> lot of gnarly things happen at startup (why it would be nice to skip-cycle the first 100 or so transfers and defer initiliazing the tmaxes or checking overruns until things are running smoothly)
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[18:58:49] <jepler> Period FP Name ( Time, Max-Time )
[18:58:49] <jepler> original: 1000000 YES thread1 ( 791768, 951596 )
[18:58:49] <jepler> overlapped: 1000000 YES thread1 ( 407579, 479038 )
[18:58:50] <jepler> whee
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[19:02:42] <PCW> Nice
[19:04:02] <jepler> one board: 1000000 YES thread1 ( 411977, 442396 )
[19:04:27] <PCW> overlap is a good thing
[19:04:31] <jepler> it sure is
[19:06:45] <KGB-linuxcnc> 03Jeff Epler 05jepler/hm2-eth-multiple 8188768 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: allow multiple instances (up to 4) * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=8188768
[19:06:46] <KGB-linuxcnc> 03Jeff Epler 05jepler/hm2-eth-multiple 67393ca 06linuxcnc 10(6 files in 2 dirs) hostmot2: support split reads * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=67393ca
[19:06:46] <KGB-linuxcnc> 03Jeff Epler 05jepler/hm2-eth-multiple 500e905 06linuxcnc 10src/hal/drivers/mesa-hostmot2/hm2_eth.c hm2_eth: in case of failed recv(), show an error * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=500e905
[19:06:59] <jepler> seb_kuzminsky: this is another one I'd like your review on, since it adds some stuff to hostmot2 (the new "read-request" hal function, mostly)
[19:07:04] <PCW> I never thought to mess with switches because I mistakenly believed that the smallest 1G packet size was 522 bytes
[19:07:05] <PCW> Turns out thats only for half duplex links
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[19:07:33] <jepler> now really off to lunch this time
[19:07:44] <PCW> ( full duplex 1G is 64 byte minimum like 100 BT )
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[19:29:57] <linuxcnc-build_> build #925 of 1402.rip-wheezy-rtpreempt-i386 is complete: Failure [4failed compile runtests] Build details are at
http://buildbot.linuxcnc.org/buildbot/builders/1402.rip-wheezy-rtpreempt-i386/builds/925 blamelist: Jeff Epler <jepler@unpythonic.net>
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[19:46:45] <linuxcnc-build_> build #3265 of 0000.checkin is complete: Failure [4failed] Build details are at
http://buildbot.linuxcnc.org/buildbot/builders/0000.checkin/builds/3265 blamelist: Jeff Epler <jepler@unpythonic.net>
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[20:22:32] <jepler> I verified my device is full duplex to the switch
[20:22:46] <jepler> the pc that is
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[20:26:07] <jepler> wow, wikipedia days optical versions of gigabit are good for terms of km
[20:26:13] <jepler> says
[20:28:06] <jepler> hm and that auto mdi-x is optional
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[20:36:02] <PCW> Half duplex is rare/old AFAICT
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[20:40:32] <cradek> Do NOT include the apostrophe for contractions. For example, search for the word DON'T by searching DON T.
[20:40:49] <cradek> someone is new at database
[20:41:42] <jepler> pcw_home: if you get a chance to test it, let me know any trouble you run into
[20:45:44] <PCW> I will test later this week
[20:49:08] <jepler> PCW: ok
[20:49:15] <PCW> Great to know that you can overlap a lot of the 100BT wiretime/slave response overhead with multiple channels (I thought its was possible but didn't know for sure)
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[21:03:00] <PCW> multiple channels with little overhead is also great for distributed I/O (but I need to see what happens to jitter with some long term banging on it)
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[21:21:11] <jepler> 3 boards:
[21:21:12] <jepler> Period FP Name ( Time, Max-Time )
[21:21:12] <jepler> 1000000 YES thread1 ( 453198, 588867 )
[21:22:13] <jepler> trying to power 3 of them from one VUSB: not the best idea.
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[21:34:47] <PCW> We had a (non linuxcnc) customer with a problem claiming 7I80HD was losing register settings
[21:34:49] <PCW> (turn on all outputs --> add ~100 mAa more drain from pullups, Pull USB power out or reg --> reset 7I80HD)
[21:35:23] <jepler> I removed the rtapi_delay from the receive loop, and it makes for a very distinctive signature in the thread1 (servo thread) time:
http://emergent.unpythonic.net/files/sandbox/thread-time-stairstep.png
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[21:36:07] <PCW> what CPU?
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[21:36:26] <jepler> core2duo
[21:36:43] <jepler> hmm possibly with CPU frequency scaling turned on (!)
[21:36:45] <jepler> no isolcpus
[21:36:52] <jepler> wheezy, kernel 3.14-rt
[21:37:17] <PCW> isolcpus seems to hurt latency on Preemt-RT in my limited testing
[21:37:44] <PCW> what MAC?
[21:37:56] <micges> PCW: what application did this non linuxcnc user use to access 7i80?
[21:38:35] <jepler> PCW: 04:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network Connection
[21:38:40] <PCW> Their own code (ground test equipment AFAICT)
[21:39:19] <PCW> do you IRQ coalescing turned off?
[21:39:27] <PCW> do you have
[21:42:51] <jepler> I don't think I have changed any irq stuff from defaults
[21:44:19] <jepler> default seems to be rx-usecs 3
[21:45:05] <jepler> changing it to 0 files off the peaks a bit
[21:46:14] <PCW> probably about 3 usec :-)
[21:49:18] <PCW> would like to know why the sawtooth is there (~30 usec on a 3 GHz machine)
[21:49:38] <jepler> yeah that is what I found interesting
[21:50:50] <PCW> it should show up in the DPLL error if its in the request packet
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[21:53:45] <kwallace_shiz> This is suppose to be round and _not_ look like a gear:
http://wallacecompany.com/machine_shop/fanuc_mpg/IMG_1539-1a.JPG
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[21:55:44] <jepler> looking at individual function .times, 0.read.time has a nice sawtooth and 1.read.time has a peak everyhwere 0.read.time is its lowest, otherwise it's negligible everywhere else
[21:56:45] <jepler> .. with the delays removed, it's also rather crashy, particularly while running halscope. at least, I hope it's removing the delays (not pushed anywhere) that has made it unreliable, not just the multiple interfaces stuff
[21:57:25] <jepler> whatever is happening, I can see from the fpga boards that packets are being sent rather slowly, probably hitting that hard-coded maximum timeout
[21:57:28] <PCW> I think its known to be crashy without the delays
[21:57:43] <jepler> but surprisingly the whole system becomes unresponsive even though the other CPU shuold be free of RT tasks
[21:59:05] <PCW> removing the dalys has been tried a couple times without success :-(
[21:59:50] <PCW> delays
[21:59:59] <jepler> groan
[22:01:17] <jepler> We set up rtapi_app to be at a higher RT priority than the IRQ. Is it priority inversion?
[22:04:32] <PCW> possibly... the Ethernet interrupt must interrupt the running thread of course
[22:06:36] <PCW> you could poke around with chrt (I have not noticed any remarkable improvements with uneducated priority futzing)
[22:09:05] <jepler> http://emergent.unpythonic.net/files/sandbox/sawtooth2.png
[22:09:29] <jepler> this is what I was trying to describe in prose a minute ago
[22:09:34] <jepler> not correlated with phase-error much
[22:13:54] <jepler> at 1kHz (vs 667Hz) servo thread, it's still typically 4 thread-executions per sawtooth
[22:14:50] <jepler> and same at 1.05kHz, 4 thread-executions per sawtooth
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[22:27:24] <PCW> that is really strange, wonder if its some characteristic of the switch
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[22:30:39] <PCW> you do have all rx packets coming back at roughly the same time so the order is not known
[22:31:47] <PCW> (determined by the request order but also the request and reply sizes)
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[22:37:04] <PCW> does the code that waits for the replies do first come/first serve?
[22:38:12] <jepler> no, it processes them in the same order as they were sent
[22:38:57] <jepler> well, more accurately, the processing is in hal's thread order and "same order as sent" seems most sensible
[22:41:01] <jepler> hm, running with 2 boards enabled instead of 3, it's just a square-ish wave instead of a sawtooth
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[22:53:11] <seb_kuzminsky> argh, it's that halui/mdi test bug again
[22:53:51] <seb_kuzminsky> i was debugging that, where did i put my branch...
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[23:35:27] <PCW> wonder if its missing cycles somehow (a scope on TP1 or TP2 might help)
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[23:45:13] <PCW> sorry TP0 and TP1. TP0 is high for PktRX time TP1 is high for PktTX time
