[Freeswitch-users] Strange "timer_test" result

[Stephen Wilde]

Thank you Chirs,
do you have any reference to how to patch the glibc for this issue?

Stephen

On Wed, Jun 27, 2012 at 1:46 PM, Christopher Rienzo <cmrienzo at gmail.com>wrote:

> The crash in the old posix timer is actually caused by a glibc
> timer_create() race condition when using SIGEV_THREAD.  So, you could
> should be able to use the old timer if you patch glibc.  I figured that was
> not a good solution for end users, so I switched to SIGEV_SIGNAL which did
> degrade performance.
>
> Chris
>
>
>
> On Wed, Jun 27, 2012 at 4:44 AM, Stephen Wilde <wstephen80 at gmail.com>wrote:
>
>> My experience in FS timers:
>>
>> 1. voice quality is related to timer_test result so if you have irregular
>> result, you'll have bad voice quality (and low ACD)
>>
>> 2. mod_posix_timer is my solution (I haven't try timerfd because I'm
>> using CentOS 5.8).
>>
>> 3. there are two version of mod_posix_timer, the "old" one (the one
>> before the fix of git 'FS-4064 mod_posix_timer workaround of CentOS 5 glibc
>> problem'  of 30 april) and the 'new' one (present in latest git)
>>
>> 4. the 'old' mod_posix_timer is much more efficient that 'new' one (with
>> 'new' mod_posix_timer is half way between 'old' mod_posix_timer and soft
>> timer).
>>
>>  5. loading the 'old' mod_posix_timer there are random FS crashes, also
>> if you don't use the posix timer in your profile
>>
>> 6. the 'new' mod_posix_timer solves the crashes of FS
>>
>> So my conclusion is that the 'old' mod_posix_timer is the best one but
>> sometimes FS crashes but the 'new' mod_posix_timer is not good as the 'old'
>> one but it solves the crash issue.
>>
>> In my production system I'm using the 'old' one in servers with high load
>> and the 'new' one in serves with less load, according with timer_test
>> results.
>>
>> Memory leak: I have done some test mixing different versions of FS and
>> mod_posix_timer and in any case, if I use the latest Freeswitch git the
>> used memory grows up continously, also if I use 'old' mod_posix_timer so,
>> my conclusion is that the memory leakage is related to Freeswitch. In my
>> production server, latest FS git + old mod_posix_timer consumes all server
>> memory (12MB) in 2 days. For this reason, in all my installation I'm using
>> the Freeswitch git of 26th march with new or old mod_posix_timer (depending
>> on timer_test result).
>>
>> Stephen
>>
>> On Wed, Jun 27, 2012 at 12:00 AM, marksly <mark at callassistants.com>wrote:
>>
>>> I am having the same issue as Stephen Wilde regarding the strange
>>> "timer_test" results. Was it determined that the mod_posix timer is the
>>> best
>>> solution? Likewise with Stephen, any timer except 20ms works great.
>>>
>>> --
>>> View this message in context:
>>> http://freeswitch-users.2379917.n2.nabble.com/Strange-timer-test-result-tp7399299p7580297.html
>>> Sent from the freeswitch-users mailing list archive at Nabble.com.
>>>
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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
> http://www.freeswitch.org
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> http://www.cluecon.com
>
> Join Us At ClueCon - Aug 7-9, 2012
>
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