[Freeswitch-users] Different behavior of FS under gdb

[mayamatakeshi]

Thanks,
yes, it was the same problem:

futex(0x7f4732b32e6c, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0x7f4732b32e68,
{FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1}) = 1
futex(0x7f4732b32ec0, FUTEX_WAKE_PRIVATE, 1) = 1

I can see Torsten created a ticket for this and Anthony already solved it:
https://jira.freeswitch.org/browse/FS-6424

Regards,
Takeshi

On Mon, Jun 23, 2014 at 7:55 PM, Steven Ayre <steveayre at gmail.com> wrote:

> Someone else on the list reported a similar startup issue on the list
> today ('Peter'). Possibly the cause is the same. The strace he did seemed
> to show it stuck on a futex, which might explain the high CPU usage you're
> seeing.
>
> Can you run freeswitch through strace and see if you're seeing the same.
>
>
> On 23 June 2014 11:04, mayamatakeshi <mayamatakeshi at gmail.com> wrote:
>
>> I tried using gcore but it got frozen too (and now I realize FS is
>> consuming 95% of the CPU time so probably it entered an infinite loop).
>> But i can see gcore is just a wrapper for gdb so I can check its man page
>> and try other things.
>> Thanks for the tip.
>>
>>
>>
>> On Mon, Jun 23, 2014 at 5:53 PM, Steven Ayre <steveayre at gmail.com> wrote:
>>
>>> Since it's running through gdb you could get slightly different
>>> behaviour, because timing etc is different.
>>>
>>> Try collecting a coredump of the program while it's frozen using 'gcore'
>>> then open that coredump using gdb. You'll be able to inspect the backtrace
>>> to find out exactly what FS was running (ie waiting on) while frozen.
>>>
>>>
>>> On 23 June 2014 09:24, mayamatakeshi <mayamatakeshi at gmail.com> wrote:
>>>
>>>> I am testing latest commit b21f34bffc with CentOS 6.5.
>>>>
>>>> FS gets stuck at this point during startup:
>>>>
>>>> # ./freeswitch -nonat
>>>> 2014-06-23 17:16:34.231865 [INFO] switch_event.c:670 Activate Eventing
>>>> Engine.
>>>> 2014-06-23 17:16:34.232154 [WARNING] switch_event.c:652 Create
>>>> additional event dispatch thread 0
>>>>
>>>> So I tried to run it under gdb,
>>>> but when i do 'r -nonat' in the gdb cli, FS doesn't get stuck and
>>>> starts properly (i get the FS CLI and I am able to execute commands in it).
>>>>
>>>> Any idea why would this be?
>>>>
>>>>
>>>>
>>>>
>>>> _________________________________________________________________________
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>>>>
>>>> 
>>>> 
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>>>
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>>>
>>> 
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>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>>
>> 
>> 
>>
>> Official FreeSWITCH Sites
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>> http://www.cluecon.com
>>
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>>
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> 
> 
>
> Official FreeSWITCH Sites
> http://www.freeswitch.org
> http://wiki.freeswitch.org
> http://www.cluecon.com
>
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