On 10/01/2014 11:12 AM, GP Orcullo wrote:
> On Oct 1, 2014 3:54 PM, "Gilles Chanteperdrix" <
> [email protected]> wrote:
>>
>> On 10/01/2014 01:32 AM, GP Orcullo wrote:
>>> On Sep 30, 2014 8:16 PM, "Gilles Chanteperdrix" <
>>> [email protected]> wrote:
>>>>
>>>> On 09/30/2014 02:04 PM, GP Orcullo wrote:
>>>>> On Sep 30, 2014 7:30 PM, "Gilles Chanteperdrix" <
>>>>> [email protected]> wrote:
>>>>>>
>>>>>> On 09/30/2014 07:31 AM, GP Orcullo wrote:
>>>>>>> Hi,
>>>>>>>
>>>>>>> Running the switchtest for extended periods (>10 mins) causes the
>>>>>>> machine to lockup.
>>>>>>>
>>>>>>> I'm running a modified xeno-regression-test which contains only the
>>>>>>> following tests:
>>>>>>>
>>>>>>> check_alive /usr/lib/xenomai/testsuite/switchtest
>>>>>>> check_alive /usr/lib/xenomai/testsuite/switchtest -s 1000
>>>>>>> check_alive /usr/lib/xenomai/testsuite/latency ${1+"$@"}
>>>>>>>
>>>>>>> The script is invoked with the following arguments:
>>>>>>>
>>>>>>> nohup sudo ./xeno-regression-test -l
>>>>>>> "/usr/lib/xenomai/testsuite/dohell -m /media/work 36000" -t 2 >
>>>>>>> /dev/null & top -d0.5
>>>>>>>
>>>>>>> The kernel dumps the OOPS information intermittently so it's
> difficult
>>>>>>> to diagnose the issue.
>>>>>>>
>>>>>>> Attached is the kernel config and the logfile.
>>>>>>
>>>>>> Ok, this is an exynos. Sorry, but I have never seen the patch for
>>>>>> exynos, so I do not know what is inside. You should direct your
>>>>>> questions to whoever provided you with this support.
>>>>>
>>>>> I'm in the process of porting xenomai to run on exynos.
>>>>>
>>>>> The ipipe-core-3.8.13-arm-3.patch applies cleanly to the 3.8.13.11
>>> kernel
>>>>> used by the odroid U3 board.
>>>>>
>>>>> Attached is the ipipe patch that I've made.
>>>>>
>>>>> I was just wondering what would cause switchtest to fail. The error
>>> that I
>>>>> can see is that the system is running out of memory and I don't know
>>>>> exactly what is causing this.
>>>>
>>>> Certainly not switchtest as it does not do any memory allocation.
>>>> However, the dohell script has a loop creating a large file and
> removing
>>>> it. So, could you try and run the dohell script with an unpatched
> kernel
>>>> and see if you have the error?
>>>>
>>>
>>> Running dohell on a patched and unpatched kernel doesn't trigger the
> lockup.
>>>
>>> Running switchtest without dohell works OK.
>>
>> Is the problem a lockup, or an OOM?
>>
>
> It's a lockup.
>
> The OOM message is the only one that I've captured so far. Most of the
> time the kernel doesn't spew any messages before the lockup.
>
> The lockups are repeatable but generating any error messages isn't.
Are you running the tests on the serial console, or with ssh? Do you
have unlocked context switch enabled? Have you tried enabling some debug
options?
Also note that xeno-regression-test puts the system under a lot of
stress, so it may happen that there is no output for some time (several
minutes), normally the test should stop by itself if there is no output
for something like 30 minutes. So, I would recommend not redirecting
xeno-test output to see if there is any error before the lockup, and
when you see the lockup, leave the system for 30 minutes to see if it
does not restart or if xeno-regression-test can exit gracefully.
--
Gilles.
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