[Freeswitch-users] High syscall percentage on Centos 7

[Brian West]

Could you document your testing methodology so others can replicate it, and
are you testing this all on the exact same hardware?

On Fri, Dec 4, 2015 at 10:20 AM, Denys D <dvmorte at gmail.com> wrote:

> We made couple of synthetic tests with sipp uac scenario (unfortunately we
> cannot move the current load from the production to the test environment
> right now) - 300 cps, 1500 calls limi;, ulimits for FS set as recommended,
> same dialplan :
>  Debian  8.2 + FS 1.2.24 - up to 95% CPU utilization with ~65% syscalls
>  Debian  8.2 + FS 1.6.5 - up to 95% CPU utilization with ~65% syscalls
>  Centos 5.11 + FS 1.2.23 - up to 85% CPU utilization with ~20% syscalls
>  Centos 6.7 + FS 1.6.5 - up to 97% CPU utilization with ~67% syscalls
>  Centos 7.1 + FS 1.6.5 - up to 97% CPU utilization with ~67% syscalls
>  Centos 7.1 + FS 1.2.24 - up to97% CPU utilization with ~67% syscalls
>  FreeBSD 10.2 + FS 1.6.5 - up to 80% CPU utilization with ~20% syscalls
> So, it seems that we've something missed when configuring FS on modern
> Linux distributives.
>
>
>
> On Fri, Nov 27, 2015 at 2:44 PM, Sergey Safarov <s.safarov at gmail.com>
> wrote:
>
>> Could you build and test FS 1.2.23 on CentOS 7.
>> Probably it can help to locate problem on OS or FS.
>>
>> Sergey
>>
>> On Thu, Nov 26, 2015 at 11:21 AM, Denys D <dvmorte at gmail.com> wrote:
>>
>>> Hi! Has anybody faced with high system calls on Centos 7 while running
>>> FreeSwitch?
>>> We have migrated from FS 1.2.23 on Centos 5.11 to FS 1.6.2 on Centos 7
>>> and faced with very high syscall (up to 60% CPU time) rate under moderate
>>> load (300 CPS, 1500 simultaneous calls). We also faced the same issue on
>>> Centos 6.7 and Debian 8.2 with FS 1.6.2 on the same hardware. On Centos
>>> 5.11 with the same load and h/w we had no more than 10% syscalls CPU time.
>>> We have already tried nohz=off kernel option and it didn't solve the
>>> problem. What should we change in our environment to achieve the same
>>> performance level as it was on Centos 5.11?
>>>
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>>
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>>
>> Official FreeSWITCH Sites
>> http://www.freeswitch.org
>> http://confluence.freeswitch.org
>> 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://confluence.freeswitch.org
> http://www.cluecon.com
>
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> http://www.freeswitch.org
>



-- 

*Brian West*
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