#linuxcnc-devel | Logs for 2015-12-03

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[02:29:32] <skunkworks> zlog:
[02:29:32] <zlog> skunkworks: Log stored at http://tom-itx.no-ip.biz:81/~tom-itx/irc/logs/%23linuxcnc-devel/2015-12-02.html
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[05:32:09] <seb_kuzminsky> skunkworks: i sometimes see overruns in the rtai testsuite/kern/latency test too, on a machine that runs without overruns on wheezy
[05:32:18] <seb_kuzminsky> it still gets good latency though
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[05:59:04] <seb_kuzminsky> so, like, whatever
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[11:32:26] <cncbasher> just a query we are using kernel 3.4-9-rtai-pae #1 smp preempt .. is this to say that it's rtai & rt-prempt combined,
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[13:21:20] <jepler> cncbasher: it needs to say "PREEMPT RT" to be useful for uspace realtime.
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[14:07:38] <skunkworks> zlog
[14:07:38] <zlog> skunkworks: Log stored at http://tom-itx.no-ip.biz:81/~tom-itx/irc/logs/%23linuxcnc-devel/2015-12-03.html
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[14:27:47] <seb_kuzminsky> cncbasher: the 3.4-9-rtai kernel has RTAI but not RT-PREEMPT
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[15:10:05] <jepler> It might be convenient for a developer to have one kernel that did both, but I'm not sure it'd be useful for a user
[15:11:17] <cradek> yeah confusingly uname does say PREEMPT on that kernel
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[15:36:58] <seb_kuzminsky> preemption support is in the mainline kernel, and is recommended for rtai
[15:37:27] <seb_kuzminsky> the rt-preempt kernel patch adds improved latency on top of the standard preempt feature of the vanilla kernel
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[15:55:26] <cradek> ah thanks for explaining
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[16:06:26] <seb_kuzminsky> shore
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[16:43:01] <cncbasher> my query was more of is it RTAI + rt-preempt as an extension of so both rtai & rtpreempt or does it remove some of the rtai features in favor of rt-preempt
[16:43:38] <cncbasher> or rtai & rt-preempt as a bonus
[16:44:32] <cncbasher> so should we say along the lines of rtai including rt-preempt extension ... just to save some confusion
[16:45:01] <cncbasher> it helps to when your running a machine with multiple kernels ,
[16:45:48] <cradek> it would be really nice if one kernel let you run either kind of realtime, but I have no idea whether it's easy/possible to make that kernel
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[16:56:48] <pcw_home> wonder if any of the Preemt-RT patches interfere with the RTAI patches
[17:01:37] <skunkworks_> pcw_home, how are you feeling?
[17:02:41] <pcw_home> almost human again
[17:17:47] <skunkworks_> Great!
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[17:24:47] <cncbasher> pcw_home glad your ok
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[19:29:24] <skunkworks__> Wow Access 97 runs on windows 10
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[20:00:31] <jepler> good for them
[20:00:39] <jepler> I'm sorry for you that you have to run access 97 though!
[20:00:48] <cradek> or windows
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[20:01:04] <jepler> if I felt sorry for skunkworks__ anytime he was using windows I'd have to feel sorry for him all the time
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[20:34:45] <skunkworks__> Felling the love :)
[20:34:51] <skunkworks__> or feeling..
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