Re: Rtai Digest, Vol 99, Issue 6

Hi Rathin,

I had the exact same problem with my two i7.

Can you try this kernel configuration ? http://pastebin.com/tzcuaadU

 Also, have you disabled HyperThreading and SpeedStep from BIOS ?

Also, try to run the test on a tty2 console (ctrl+alt+f2, then to return to
x ctrl+alt+f1).


Il giorno sab 5 mar 2016 alle ore 16:32 <[email protected]> ha scritto:

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>    1. Re: Rtai Digest, Vol 99, Issue 1 (Rathin Dholakia)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 5 Mar 2016 21:02:12 +0530
> From: Rathin Dholakia <[email protected]>
> To: Francescodario Cuzzocrea <[email protected]>
> Cc: [email protected]
> Subject: Re: [Rtai] Rtai Digest, Vol 99, Issue 1
> Message-ID:
>         <CAJW6HtSm26Sx3VUb7jb5UiecDN0sMqYJ=
> [email protected]>
> Content-Type: text/plain; charset="utf-8"
>
> Dear Francescodario,
>
> This thread seems to be dead yet I faced the same issue so I thought of
> sharing my information.
>
> Herewith attaching my kernel config & RTAI config file.
>
> My observation:
> System specifically hangs when we fiddle around preemption or threading.
> 1) if you run latency/preemption test it will hang
>    Modules loaded at the time (rtai_sched, rtai_hal, rtai_sem, rtai_mq,
> rtai_msg,rtai_shm,rtai_fifos, rtai_bits, rtai_mbx)
>
> I tried different combination of modules yet it hangs
>
> 2) simply load preemption_rt.ko or kthread.ko module and system will hang
> immediately.(in my case at least)
>
> This problem occurs specifically in latest version of RTAI ( I am using
> ShabbyX -- i.e. RTAI 5.1 I guess).
>
> Currently by using RTAI 4.1 this issue can be averted ( with NewLib ).
>
> Hope this helps debug the issue.
>
> Sincerely,
> Rathin
>
>
> On Tue, Mar 1, 2016 at 9:18 PM, Francescodario Cuzzocrea <
> [email protected]> wrote:
>
> > Hi Artyon,
> >
> > first, in order to get some help you should attach at least you kernel
> > (the .config file inside the kernel sources folder) and rtai
> configuration
> > (the .rtai-config file inside the rtai source folder), so we can see if
> is
> > ok.
> >
> > Il giorno mar 1 mar 2016 alle ore 12:00 <[email protected]> ha
> > scritto:
> >
> >> Send Rtai mailing list submissions to
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> >> To subscribe or unsubscribe via the World Wide Web, visit
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> >> or, via email, send a message with subject or body 'help' to
> >>         [email protected]
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> >>         [email protected]
> >>
> >> When replying, please edit your Subject line so it is more specific
> >> than "Re: Contents of Rtai digest..."
> >>
> >>
> >> Today's Topics:
> >>
> >>    1. Latency test hangs system (Artyom Lobach)
> >>
> >>
> >> ----------------------------------------------------------------------
> >>
> >> Message: 1
> >> Date: Tue, 1 Mar 2016 10:42:31 +0300
> >> From: Artyom Lobach <[email protected]>
> >> To: [email protected]
> >> Subject: [Rtai] Latency test hangs system
> >> Message-ID:
> >>         <CAFYUkWvoqWy_kcpA4t+1ySSFyOPnYCiQ4D8g3=
> >> [email protected]>
> >> Content-Type: text/plain; charset="utf-8"
> >>
> >> Hi! I installed RTAI v4.1 with linux kernel v3.10.32 on Ubuntu 14.04
> >> according this instruction (related to i386 arch):
> >> https://gist.github.com/gaoyifan/c881aa36cd02fb5c1c20.
> >> At the end of installation I tried kern/latency test, but it hangs
> system
> >> with no errors in console and kern.log file. only one warning:
> >> *"Error opening /proc/rtai/latency_calibrate*
> >> *Couldn't get infos about the module's state" - *an empty latency table
> >> below and no reaction.
> >> That happens with different components (i tried with different kernels
> and
> >> rtai versions during last 2 weeks).
> >> I think the kernel or rtai configuration for my machine is wrong, but in
> >> what way should i correct it?
> >>
> >> Thakns in advance!
> >>
> >> Best Regards
> >> Artyom
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> --
> Rathin A. Dholakia
> "Dont GO through life, GROW through life"
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