[Freeswitch-users] freeswitch CPU usage

[Woody Dickson]

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
>
>
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