[Freeswitch-users] Performance optimization and stack size value

Kevin Mathy k.mathy at hexanet.fr
Wed Feb 19 18:44:08 MSK 2014 

Right, I'll ask for it !




*Bien cordialement, Best Regards,  **Kevin MATHY* | Ingénieur VoIP



2014-02-19 6:26 GMT+01:00 Brian West <brian at freeswitch.org>:

> Since the wiki is wrong you may update that page by requesting an account.
>
> Sent from my iPad
>
> On Feb 18, 2014, at 4:08 AM, Kevin Mathy <k.mathy at hexanet.fr> wrote:
>
> Hi Peter, Anthony,
>
> Thanks for your answers.
> Indeed, if I wanted to increase the stack size, it was just because of the
> advices written on this wiki page :
> http://wiki.freeswitch.org/wiki/Performance_testing_and_configurations
>
> I'm just a bit aware of how works internally a Linux OS, and so I simply
> followed what was said on the wiki, thinking that it'll be OK.
> But in fact, it's not...
>
> Anyway, I'll follow what you said, and let the stack size value to 240k,
> as FS doesn't need to use more. Thank you for this information.
>
> Otherwise, when I make a "top" on my system, I've got the following output
> :
>
>> Tasks: 138 total,   1 running, 137 sleeping,   0 stopped,   0 zombie
>> Cpu0  :  2.0%us,  1.3%sy,  0.0%ni, 95.0%id,  0.0%wa,  0.0%hi,  1.7%si,
>>  0.0%st
>> Cpu1  :  1.3%us,  2.3%sy,  0.0%ni, 96.4%id,  0.0%wa,  0.0%hi,  0.0%si,
>>  0.0%st
>> Cpu2  :  0.7%us,  0.7%sy,  0.0%ni, 98.7%id,  0.0%wa,  0.0%hi,  0.0%si,
>>  0.0%st
>> Cpu3  :  0.7%us,  2.0%sy,  0.0%ni, 97.4%id,  0.0%wa,  0.0%hi,  0.0%si,
>>  0.0%st
>> Cpu4  :  2.0%us,  1.7%sy,  0.0%ni, 96.4%id,  0.0%wa,  0.0%hi,  0.0%si,
>>  0.0%st
>> Cpu5  :  1.0%us,  1.7%sy,  0.0%ni, 97.3%id,  0.0%wa,  0.0%hi,  0.0%si,
>>  0.0%st
>> Cpu6  :  0.3%us,  0.7%sy,  0.0%ni, 99.0%id,  0.0%wa,  0.0%hi,  0.0%si,
>>  0.0%st
>> Cpu7  :  0.3%us,  1.0%sy,  0.0%ni, 98.7%id,  0.0%wa,  0.0%hi,  0.0%si,
>>  0.0%st
>> Mem:  16455916k total,  3046676k used, 13409240k free,   356088k buffers
>> Swap:  7128056k total,        0k used,  7128056k free,  2373412k cached
>>   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  P COMMAND
>>
>>
>>
>>
>>  3497 freeswit  -2 -10  505m  92m 6812 S   *25 * 0.6   1430:38 5
>> freeswitch
>
>
> In which we can see that FS seems to use 25% of CPU ressources, but all
> CPUs seem to be around 7% used (all counted).
> So my question is : which one is the real value about CPU percentage used
> ?
>
> I'm remember that FS has a function to refuse new calls if a CPU used
> precentage threshold is reached, and I'd like to set this value as well as
> possible. And for that I have to know the real usage of my CPU by FS.
>
> Thanks a lot for your help,
>
>
>
> *Bien cordialement, Best Regards,  **Kevin MATHY* | Ingénieur VoIP
>
>
>
> 2014-02-14 20:28 GMT+01:00 Anthony Minessale <anthony.minessale at gmail.com>
> :
>
>> Stack size is how much ram is reserved per thread open.  We only need
>> 240k and you are offering to let it use 8 megs.
>>
>>
>>
>>
>>  On Fri, Feb 14, 2014 at 8:57 AM, Peter Olsson <peter at olssononline.se>wrote:
>>
>>> Why do you want to increase stack size? FS tries to keep it as low as
>>> possible.
>>>
>>>
>>> 2014-02-14 15:45 GMT+01:00 Kevin Mathy <k.mathy at hexanet.fr>:
>>>
>>>> Hi List,
>>>>
>>>> I'm trying to make my FS server more performant and reliable, and I
>>>> found the FS's wiki page telling that I can change some "ulimit" values on
>>>> my system, like the Stack Size.
>>>>
>>>> So, I've changed in the init script the "ulimit -s" value to 8192, but
>>>> now when I start freeswitch I've got the following error message :
>>>>
>>>>> Error: stacksize 8192 is not optimal: run ulimit -s 240 from your
>>>>> shell before starting the application.
>>>>> auto-adjusting stack size for optimal performance...
>>>>
>>>>
>>>> So when I check the status :
>>>>
>>>>> freeswitch at 10.84.9.41@internal> status
>>>>> UP 0 years, 0 days, 0 hours, 0 minutes, 6 seconds, 661 milliseconds,
>>>>> 592 microseconds
>>>>> FreeSWITCH (Version 1.3.17 git 16289ce 2013-03-14 03:24:25Z) is ready
>>>>> 0 session(s) since startup
>>>>> 0 session(s) - 0 out of max 30 per sec
>>>>> 1000 session(s) max
>>>>> min idle cpu 0.00/100.00
>>>>> Current Stack Size/Max 240K/8192K
>>>>
>>>>
>>>> It seems that the 8192 value isn't set and is rollbacked to 240...
>>>> I've got exactly the same result when the init script is filled with
>>>> "ulimit -s 240".
>>>>
>>>> Do you have any idea about how to have the stack size increased ?
>>>>
>>>> Thanks a lot,
>>>>
>>>>
>>>>
>>>> *Bien cordialement,  Best Regards, **Kevin MATHY* | Ingénieur VoIP
>>>>
>>>>
>>>>
>>>>
>>>> _________________________________________________________________________
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>>>> http://www.freeswitchsolutions.com
>>>>
>>>> 
>>>> 
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>>>>
>>>
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>>> 
>>> 
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>>>
>>
>>
>> --
>> Anthony Minessale II       ♬ @anthmfs  ♬ @FreeSWITCH  ♬
>>
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>>
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>> http://www.freeswitchsolutions.com
>>
>> 
>> 
>>
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>>
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>>
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> 
> 
>
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> http://www.cluecon.com
>
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>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> 
> 
>
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>
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