Re: [Xenomai-help] Problems when cross-compiling Xenomai

[Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>]

Felipe Brandão Cavalcanti wrote:
> 2010/2/11 Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
> 
>> Felipe Brandão Cavalcanti wrote:
>>> 2010/2/11 Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.orgom>
>>>
>>>> Felipe Brandão Cavalcanti wrote:
>>>>> Sending the boot log and the xeno-test output as attachments.
>>>> [    0.000000] OMAP clockevent source: GPTIMER12 at 32768 Hz
>>>>
>>>> Definitely not OK. We do not want this unprecise clockevent source.
>>>> Disable it in the kernel configuration (option CONFIG_OMAP_32K_TIMER).
>>>>
>>>>
>>> This is very interesting - this option doesnt seem to be set in my
>> current
>>> kernel config. Ive attached my .config.
>> Selecting GPTIMER 1 should work. But if you get lockups or thing like
>> that, please try with a vanilla 2.6.30 to see if you get them.
>>
>>
> Great - changing GPTIMER to 1 did the trick! Gilles, thank you very much!
> 
> Here are the results of the first latency test, under 100% load:
> 
> RTT|  00:08:46  (periodic user-mode task, 1000 us period, priority 99)
> RTH|----lat min|----lat avg|----lat max|-overrun|---msw|---lat best|--lat
> worst
> RTD|     12.999|     13.769|     18.846|       0|     0|     12.538|
> 44.692
> RTD|     13.076|     13.769|     20.692|       0|     0|     12.538|
> 44.692
> RTD|     12.923|     13.769|     18.076|       0|     0|     12.538|
> 44.692
> RTD|     12.846|     13.769|     20.153|       0|     0|     12.538|
> 44.692
> RTD|     12.999|     13.769|     18.692|       0|     0|     12.538|
> 44.692
> RTD|     12.999|     13.769|     19.230|       0|     0|     12.538|
> 44.692
> RTD|     13.076|     13.769|     18.769|       0|     0|     12.538|
> 44.692
> RTD|     13.076|     13.769|     19.153|       0|     0|     12.538|
> 44.692
> RTD|     12.846|     13.769|     19.999|       0|     0|     12.538|
> 44.692
> 
> BTW, the system does seem a lot more stable now - no random errors. I will
> run some more tests, and will send in the results later - I will document
> the procedure and post it online once we get Xenomai running well in the
> IGEPv2.

Ok. Good news. I would have liked to find out what was this building
issue of yours, at least to be able to use your rootfs build system
instead of building xenomai manually.

-- 
Gilles Chanteperdrix, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com