Re: Rtai Digest, Vol 99, Issue 6

Dear Francescodario,

I am trying out that method, kernel is compiling will update you. but
before going ahead I just wanted to ask that after disabling my Hiper
threading- my "getconf _NPROCESSORS_ONLN" shows only 2 CPUs!
where as i3 is supposed to have 4 cpus, correct?

So, what CPU count should I use in config? 4 or 2?

Currently I am going ahead with 4!

Regards,
Rathin

On Sun, Mar 6, 2016 at 5:09 PM, Francescodario Cuzzocrea <
[email protected]> wrote:

> 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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>> Today's Topics:
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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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>> >> or, via email, send a message with subject or body 'help' to
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>> >> 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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-- 
Rathin A. Dholakia
"Dont GO through life, GROW through life"

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