[Freeswitch-users] High syscall percentage on Centos 7

[Anthony Minessale]

The syscalls are the read and write from the RTP stack probably.
We don't give official help on load related queries because its too
subjective to the environment.
300cps for a hint though, is 6 times the industry standard that even a
commercial product will claim to do in terms of CPS.


On Mon, Nov 30, 2015 at 3:51 AM, Michael Giagnocavo <mgg at giagnocavo.net>
wrote:

> Without media, FS  seems to spend around 30-40% of its CPU time in
> malloc/free[1]. While I wouldn’t think this would directly create so many
> syscalls, it might be something to look at. Otherwise, start by seeing what
> syscalls are actually being made and go from there.
>
>
>
> -Michael
>
>
>
> *From:* freeswitch-users-bounces at lists.freeswitch.org [mailto:
> freeswitch-users-bounces at lists.freeswitch.org] *On Behalf Of *Sergey
> Safarov
> *Sent:* Friday, 27 November, 2015 6:44
> *To:* FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org>
> *Subject:* Re: [Freeswitch-users] High syscall percentage on Centos 7
>
>
>
> 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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-- 
Anthony Minessale II       ♬ @anthmfs  ♬ @FreeSWITCH  ♬

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