<div dir="ltr"><div><div>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 : <br></div><div> Debian 8.2 + FS 1.2.24 - up to 95% CPU utilization with ~65% syscalls<br> Debian 8.2 + FS 1.6.5 - up to 95% CPU utilization with ~65% syscalls</div><div> Centos 5.11 + FS 1.2.23 - up to 85% CPU utilization with ~20% syscalls<br> Centos 6.7 + FS 1.6.5 - up to 97% CPU utilization with ~67% syscalls</div><div> Centos 7.1 + FS 1.6.5 - up to 97% CPU utilization with ~67% syscalls<br> Centos 7.1 + FS 1.2.24 - up to97% CPU utilization with ~67% syscalls</div><div> FreeBSD 10.2 + FS 1.6.5 - up to 80% CPU utilization with ~20% syscalls<br></div><div></div><div class="gmail_extra">So, it seems that we've something missed when configuring FS on modern Linux distributives.<br><br><br><div class="gmail_quote">On Fri, Nov 27, 2015 at 2:44 PM, Sergey Safarov <span dir="ltr"><<a href="mailto:s.safarov@gmail.com" target="_blank">s.safarov@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Could you build and test FS 1.2.23 on CentOS 7.<div>Probably it can help to locate problem on OS or FS.</div><div><br></div><div>Sergey </div></div><div class="gmail_extra"><br><div class="gmail_quote"><span>On Thu, Nov 26, 2015 at 11:21 AM, Denys D <span dir="ltr"><<a href="mailto:dvmorte@gmail.com" target="_blank">dvmorte@gmail.com</a>></span> wrote:<br></span><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><span><div dir="ltr"><div>Hi! Has anybody faced with high system calls on Centos 7 while running FreeSwitch?<br></div>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? <br></div>
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