[Freeswitch-users] freeswitch CPU usage

[Woody Dickson]

Based on my experiment, that is still the case with CentOS.  After
using my own UDP, I was able to get 70K pps on 1 ethernet card on a
Intel 5550.  The limitation is that I don't have enough machine power
to fire off enough calls to max it out.


On Mon, Aug 23, 2010 at 8:25 PM, Nyamul Hassan <mnhassan at usa.net> wrote:
> Is this also the case for the recommended CentOS / RHEL?  Do you still have
> to resort to having your own UDP implementation to max out Eth Card
> limitation?
> In the past, I have found a limitation on Linux, that the eth driver is
> single-threaded.  So, I couldn't push beyond 50K pps on a Intel Quad E5504
> HP machine through 1 ethernet card.
> Regards
> HASSAN
>
> On Mon, Aug 23, 2010 at 09:34, Woody Dickson <woodydickson at gmail.com> wrote:
>>
>> Hi Vince,
>>
>> I have played with running Freeswitch on BSD too but the result is not
>> great.  The reason seems to be because BSD's threading is not as
>> efficient as the one in Linux or there may be some other ways to tune
>> it.  BSD does give a better pure UDP throughput performance by the
>> way.
>>
>> So what I ended up doing is developing my own UDP implementation which
>> enable media to move through the ethernet at raw wire speed.  I am
>> able to max out the ethernet card limitation on Linux platform as a
>> result of that.
>>
>> Woody
>>
>>
>> On Mon, Aug 23, 2010 at 1:53 AM, Vincent Stemen
>> <vince.freeswitch at hightek.org> wrote:
>> > On Fri, Aug 20, 2010 at 05:29:31PM +0800, Woody Dickson wrote:
>> >> Hi,
>> >>
>> >> I am doing some experiments with Freeswitch by torturing it to see how
>> >> the machine's CPU response to heavy loaded situation.
>> >> The test is done on a 16 core 5550 dual quad core server running
>> >> fedora 2.6.30.10-105.2.23.fc11.x86_64 OS.
>> >>
>> >> What I found so strange was that while CPU usage remains pretty low
>> >> and distributed among all cores at 190 - 200 calls per second.  Then,
>> >> after added a few more calls per second, all CPU becomes fully
>> >> utilized.
>> >>
>> >> Is this due to some wrong setting?  Any idea how I can tweak the
>> >> configuration and continue my test?
>> >>
>> >> Thanks,
>> >> Woody
>> >
>> > Hi Woody.
>> >
>> > I would hazard to guess that this could be a Linux resource management
>> > issue.  I don't have any experience with SMP on Linux, but Linux has
>> > a long history of memory management (among other) problems.  We ran
>> > Linux exclusively on all our servers and workstations for over 10 years
>> > before finally switching to BSD several years ago.  We had continuous
>> > problems ranging from minor strange unexplained behaviours, as you
>> > describe, to what appeared to be bugs in applications, to outright
>> > crashes and freezes of the whole OS every day.  When we switched to BSD
>> > nearly all the problems went away.  Even some of the (what appeared to
>> > be) bugs in Linux binary applications went way, going from Linux to BSD
>> > running under Linux emulation (without re-compiling), using the same
>> > Linux libraries on the same hardware.
>> >
>> > An interesting test would be to try the same load test with BSD on the
>> > same machine and see if you get a similar result.
>> >
>> > Regards,
>> > Vince
>> >
>> >
>> > _______________________________________________
>> > FreeSWITCH-users mailing list
>> > FreeSWITCH-users at lists.freeswitch.org
>> > http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>> > UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
>> > http://www.freeswitch.org
>> >
>>
>> _______________________________________________
>> FreeSWITCH-users mailing list
>> FreeSWITCH-users at lists.freeswitch.org
>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
>> http://www.freeswitch.org
>
>
> _______________________________________________
> FreeSWITCH-users mailing list
> FreeSWITCH-users at lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
> http://www.freeswitch.org
>
>