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[00:10:03] <skunkworks> and it almost seeems like the previous iso has better latency
[00:15:00] <skunkworks> but I thought they had the same kernel
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[03:27:02] <cradek> yeah I haven't changed the kernel. I'm really surprised it changed.
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[07:57:52] <KGB-linuxcnc> 03Chris Morley 05new_pncconf 8891b48 06linuxcnc 718 commits pushed, 10702 files changed, 03247849(+), 0419575(-)
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[11:39:09] <jepler> kgb really doesn't know what to make of rebases, does it...
[11:40:31] <jepler> also, cool: cmorley knows how to rebase. I hope he knows how / learns how to squash his commits too. it needs a slogan, like "nix the wips"
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[11:51:18] <skunkworks> cradek, never mind about the iso on wlo.. It must have been a bad burn or bad usb drive.. I burned it again on a different media and it mounted during install. (also latency seems much better)
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[12:00:59] <skunkworks> (the machine that normally has around 10us latency was pushing 50us...)
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[13:41:38] <jepler> hm, why do I bother building linuxcnc under clang scan-build if I'm just going to disbelieve most of the diagnostics?
[13:43:34] <jepler> http://emergent.unpythonic.net/files/sandbox/report-705972.html#EndPath
[13:44:29] <jepler> clang seems to think that "te_ptr" in iteration 2 is the same memory as "te" in iteration 1, but it seems to me they must be different if it's a proper linked list
[13:45:34] <jepler> http://emergent.unpythonic.net/files/sandbox/report-c92440.html#EndPath
[13:46:05] <jepler> though this one looks like it's right -- the error message was probably intended to have pin->port_num as its argument.
[13:47:16] <cradek> yep
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[13:48:09] <jepler> I was interested in running scan-build on the uspace branch mostly because I wasn't sure if for kernel-based RTOSes, the existing scan-build could check kernel modules
[13:48:46] <cradek> are there few enough diagnostics that you can at least glance at them all?
[13:49:11] <jepler> 167, so not really
[13:49:56] <skunkworks> cradek, installed - it still seems to have worse latency. (>50us vs <15) I am having dad put the old hd back in and re-test latency with 10.04
[13:50:46] <jepler> ooh here are some more accurate ones
[13:50:48] <jepler> static GLfloat *feedback_buffer = NULL;
[13:50:53] <jepler> feedback_buffer = realloc( feedback_buffer, sizeof(int) * sz);
[13:50:59] <jepler> scan-build says: Result of 'malloc' is converted to a pointer of type 'GLfloat', which is incompatible with sizeof operand type 'int'
[13:57:48] <jepler> wow, a reminder that xz is much better than gz:
[13:57:50] <jepler> 5.9M linuxcnc-uspace-scan-build-diagnostics.tar.gz
[13:57:53] <jepler> 912K linuxcnc-uspace-scan-build-diagnostics.tar.xz
[13:58:00] <jepler> (both using default compression level)
[13:58:17] <jepler> anyway, if anyone cares to look at the scan-build diagnostics:
http://emergent.unpythonic.net/files/sandbox/linuxcnc-uspace-scan-build-diagnostics.tar.xz
[13:58:35] <jepler> I know buildbot runs scan-build, but I couldn't figure out where it puts its diagnostics
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[14:26:45] <cradek> jepler: I think that loop doesn't free the first (last remaining) te
[14:27:25] <cradek> it only ever frees next's payload
[14:29:22] <cradek> in step 4 do you know which memory it is saying it thinks is used after free?
[14:29:52] <jepler> cradek: I *think* the first item in a list has no payload.
[14:30:56] <jepler> http://www.makelinux.net/ldd3/chp-11-sect-5
[14:31:56] <jepler> cradek: I assume the memory purportedly used in step 4 at line 184 is the line freed in step 2 at line 185 (previous loop iteration)
[14:32:18] <jepler> of course, it's entirely possible that my implementation of the list ops for userspace is wrong
[14:34:06] <jepler> I should figure out whether I can valgrind rtapi_app when it's running as root
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[14:38:05] <skunkworks> jepler, the 7i80 is still running with no issues
[14:40:03] <jepler> skunkworks: cool, though you have a ways to go until you match pcw's 31 billion packet record he reported last week..
[14:40:36] <skunkworks> right.. although I bet pcw has a machine setup right now that will beat the record.. ;)
[14:43:13] <skunkworks> I don't know if I could leave it alone long enough..
[14:56:12] <jepler> to avoid the false warning at line 184, clang would have to know that x->next->prev == x
[14:56:31] <jepler> not knowing that, it can't infer that rtapi_list_del(te_ptr) changes hm2->tram_read_entries.next
[14:56:41] <jepler> your favorite static analyzer sucks
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[15:04:18] <seb_kuzminsky> jepler: i hid the link to clang on the buildbot dev page:
http://buildbot.linuxcnc.org/dev.html
[15:04:29] <seb_kuzminsky> which points to
http://buildbot.linuxcnc.org/clang/
[15:04:45] <seb_kuzminsky> then in the scratch section are links to the clang results from all non-release branches
[15:15:42] <cradek> my responses to these are "that's so complicated I don't get what it's even saying, but it seems to run, so whatever" or "that sure is wrong, wonder what the author really intended, oh well it seems to run."
[15:18:07] <seb_kuzminsky> at some point i should re-figure-out how to run linuxcnc through Coverity Scan again
[15:19:24] <seb_kuzminsky> last time i did it, years(?) ago, it found lot of things that clang missed (and that never bite our users)
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[15:20:55] <cradek> decade = 1;
[15:20:55] <cradek> sub_decade = 1;
[15:20:55] <cradek> actual_usec_per_div = decade * sub_decade;
[15:20:59] <cradek> uhh
[15:21:16] <cradek> oh well it seems to run
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[15:27:44] <skunkworks> I wonder if there is something not quite right with the motherboard dad is using.. (here the computers seem to have similar latencys to 10.04..)
[15:27:52] <skunkworks> maybe a bios setting
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[15:37:38] <jepler> seb_kuzminsky: thanks
[15:37:53] <cradek> haha,
http://buildbot.linuxcnc.org/clang/2.6-sim/v2.6.0-pre4/report-xJ2zBI.html#EndPath
[15:38:13] <jepler> looks like clang 3.5 finds ~30 more diagnostics (138 in precise-amd64-clang with unspecified clang version, 167 in mine with clang 3.5 on debian 7)
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[15:44:15] <seb_kuzminsky> jepler: yeah, it keeps getting better(?) and better(?)
[15:44:18] <cradek> this is the kind where "fixing" the diagnostic would make the code worse:
http://buildbot.linuxcnc.org/clang/2.6-sim/v2.6.0-pre4/report-WnEJES.html#EndPath
[15:44:41] <seb_kuzminsky> now that we have an rtai kernel on precise and wheezy i should move the clang-rtai build to one of those buildslaves
[15:44:55] <jepler> cradek: yes indeed
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[15:46:19] <seb_kuzminsky> that's an unusual idiom
[15:49:33] <jepler> well, looking at these *is* enough to irritate me about the general code quality of linuxcnc, so mission accomplished I guess
[15:51:53] <seb_kuzminsky> if we git rm emclcd and halrmt that removes like 75% of our clang warnings
[15:52:28] <cradek> and classicladder and nml will take care of the rest
[15:52:36] <seb_kuzminsky> heh
[15:52:50] <cradek> then I'll fix these three I recently wrote:
http://buildbot.linuxcnc.org/clang/2.6-sim/v2.6.0-pre4/report-qvCVR2.html#EndPath
[15:54:25] <jepler> just a heads up: I'll be busy with guests from about 9-12, and then out of town until about the 21st
[15:55:25] <jepler> so I will be unlikely to act on any further code reviews before then
[15:56:14] <jepler> or we could just go ahead and merge it <3/8 wink>
[15:57:28] <cradek> wfm
[15:58:57] <CaptHindsight> the 3.4.55 RTAI kernel and the wheezy-sim work so far on Mint-Debian-Mate, did anyone ever package linuxcnc with RTAI for wheezy?
[15:59:16] <cradek> not for that kernel
[15:59:42] <CaptHindsight> ah, then which kernel and where are the packages?
[16:00:52] <cradek> www.linuxcnc.org wheezy 2.6
[16:01:11] <cradek> the kernel's in base
[16:03:00] <seb_kuzminsky> the precise rtai debs are for 3.4.55, they'll probably work on the same kernel in wheezy
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[16:03:12] <seb_kuzminsky> deb
http://linuxcnc.org precise 2.6
[16:03:43] <CaptHindsight> I was going to try those next
[16:03:55] <jepler> too many kernels
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[16:05:58] <CaptHindsight> I'm just testing to see if it works. The Video drivers have issues with new hardware in Mate and Cinnamon
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[16:12:08] <CaptHindsight> oh yeah, it wants libboost-python1.46.1
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[16:59:52] <CaptHindsight> ok, the precise 3.4.55 RTAI and Linuxcnc work in Mint-Debian-Mate
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[17:35:56] <skunkworks> this asus laptop runs 12us latency on the wheezy image
[17:36:05] <skunkworks> doesn't see the wireless though
[17:36:23] <skunkworks> and that is on battery
[17:38:56] <skunkworks> huh - seems to be an intel wireless nic
[17:51:53] <seb_kuzminsky> jthornton: i dont understand the thc change that you and marius liebenberg are talking about, but i keep hearing about velocity and acceleration control
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[17:52:10] <seb_kuzminsky> can't that be handled by the limit3 component? seems silly to reimplement it in thc
[17:53:43] <seb_kuzminsky> i didnt understant marius's objection when i suggested it
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[18:22:56] <CaptHindsight> well it runs, but the latency is terrible, was ~7K with the LiveCD
[18:24:38] <skunkworks> what is it now?
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[19:01:09] <PCW> I agree with seb, reimplementing limit 3 in THCUD (or TCH) seems contrary to the normal hal (or unix)
[19:01:11] <PCW> "string comps together system" for THC external PID probably makes sense also
[19:01:12] <PCW> Hmm wonder if theres a way to embed a component in a component...
[19:02:07] <cradek> it seems like there's also something going on where an input goes from 0 to 100 to represent percentages or something -- that is also not the normal hal way
[19:04:47] <PCW> for most systems (with step motor on Z) the stepgen accel limit works
[19:05:56] <PCW> of course this fails on servo systems (not sure you would want a servo near a plasma torch though)
[19:24:51] <jepler> It's too bad the design of HAL didn't come up with a way to make things both components (which can be hooked together in hal) and objects (things which can be embedded by other components to perform a sub-function)
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[19:28:50] <KGB-linuxcnc> 03Norbert Schechner 052.6 78df5fb 06linuxcnc 10src/emc/usr_intf/gmoccapy/gmoccapy.py 10src/emc/usr_intf/gmoccapy/release_notes.txt gmoccapy_1_1_5_4 - solved screen 2 bug * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=78df5fb
[19:28:53] <jepler> (that is, ddt, limit3, etc could be "C" functions with extern linkage, available to any component)
[19:30:12] <seb_kuzminsky> yay, gmoccapy fix in 2.6 :-)
[19:31:18] <jepler> (but those two examples both have *state*, so now they each have a structure that is part of the API, too)
[19:33:05] <jepler> double ddt_function(struct ddt_state *st, unsigned long dt, double in);
[19:33:17] <KGB-linuxcnc> 03Norbert Schechner 05master 7b2346b 06linuxcnc 10src/emc/usr_intf/gmoccapy/gmoccapy.py 10src/emc/usr_intf/gmoccapy/release_notes.txt gmoccapy_1_1_5_4 - fixed screen 2 error * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=7b2346b
[19:33:36] <jepler> branch understand fail
[19:34:16] <seb_kuzminsky> aww, same commit in master :-/
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[19:35:20] <cradek> ...
[19:38:21] <jepler> seb_kuzminsky: any thoughts to share on a timeline to merge rtos-uspace?
[19:42:17] * jepler wonders if "Niemand Sonst" = "none other"?
[19:44:00] <CaptHindsight> skunkworks: it's ~500K
[19:44:55] <skunkworks> oh - yeck
[19:45:55] <CaptHindsight> so something is missing or not setup right, plus the EFI is flaky,
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[19:49:45] <cmorley> cmorley knows how to squash commits too -- and will before merging. :)
[19:50:08] <jepler> cmorley also knows how to talk about himself in the third person. excellent.
[19:50:17] <cmorley> lol
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[20:03:06] <jthornton> seb_kuzminsky, I don't know what Marius is talking about
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[20:16:32] <seb_kuzminsky> bummer
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[20:19:38] <JT-Shop> yea, I can't understand how using the F word and the period he gets an acceleration AFAIK those two number won't vary as you cut
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[21:33:43] <micges-dev> PCW: got chance to pull mesaflash repo and check ethernet comm?
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[21:49:07] <CaptHindsight> hmm, increased memlock to 81920 and latency is ~23K now
[21:49:28] <CaptHindsight> also turned off kernel mode settings
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[21:57:25] <PCW> micges-dev: will check right now still working on 7I90 ssremote
[21:59:00] <micges-dev> ok
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[22:07:52] <PCW> OK seems good
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[22:11:29] <micges-dev> thanks
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[22:15:36] <PCW> Ha the 7I90 starts with ssslbp now
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[22:18:33] <PCW> Card Name = 7I90 Channel = 0 Baud Rate = 2500000
[22:18:35] <PCW> RecvBuffer = HEX 00 0D 00 00 00 FF FF FF 00 FF FF FF 00 00 00 00
[22:18:37] <PCW> State = blather1
[22:18:38] <PCW> CRCErrorCount = 0
[22:18:40] <PCW> LBPDataSize = 0 RPCRecvSize = 13 RPCXmitSize = 12
[22:18:41] <PCW> MeasuredTime = 132.000 uS Response time = 24.000 uS LoopTime = 4.000 uS
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[22:32:22] <micges-dev> cool
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[22:32:50] <micges-dev> you had to rewrite sserial slave into fpga onboard cpu?
[22:33:01] <PCW> Yes
[22:33:41] <micges-dev> how much room it takes?
[22:33:44] <PCW> well I just wrote it from scratch sine the environment/hardware is so different
[22:33:49] <PCW> since
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[22:34:51] <PCW> about 700 instructions so far
[22:35:33] <PCW> still needs:
[22:35:34] <PCW> discovery database init
[22:35:36] <PCW> watchdog
[22:35:37] <PCW> blinkylights
[22:37:39] <PCW> probably about 1K when done, more if there are more modes supported
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[22:39:43] <micges-dev> nice
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[22:42:27] <PCW> need to write some string macros for the database init
[22:42:28] <PCW> ldib something
[22:42:30] <PCW> stab somewhere
[22:42:31] <PCW> ldib somethingelse
[22:42:33] <PCW> stab somewhere+1 ...
[22:42:34] <PCW> gets old pretty fast
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[22:52:04] <skunkworks_> ssslbp?
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[23:02:53] <alex_joni> super speedy serial link bit protocol
[23:03:31] <micges-dev> heh I think too many 's'
[23:03:40] <micges-dev> smart serial little binary protocol
[23:04:03] <alex_joni> hey.. I was actually quite close
[23:04:35] <micges-dev> yeah
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[23:26:03] <skunkworks_> it had 3 S's
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[23:29:26] <alex_joni> super smart then
[23:29:59] <jepler> somewhat silly serial
[23:30:05] <jepler> (hi alex_joni)
[23:32:05] <jepler> ah, I meant "slightly silly".
http://en.wikipedia.org/wiki/Election_Night_Special
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