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@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@lists.freeswitch.org [mailto: freeswitch-users-bounces@lists.freeswitch.org] *On Behalf Of *Sergey Safarov *Sent:* Friday, 27 November, 2015 6:44 *To:* FreeSWITCH Users Help <freeswitch-users@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@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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