Re: Rtai Digest, Vol 99, Issue 1

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:
>
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>>    1. Latency test hangs system (Artyom Lobach)
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>> 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]>
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>>
>> 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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