Is this implementation open source? -- Kristian Kielhofner http://blog.krisk.org ----- Original Message ----- From: freeswitch-users-bounces@lists.freeswitch.org <freeswitch-users-bounces@lists.freeswitch.org> To: FreeSWITCH Users Help <freeswitch-users@lists.freeswitch.org> Sent: Mon Aug 23 09:44:04 2010 Subject: Re: [Freeswitch-users] freeswitch CPU usage 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@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@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@hightek.org> wrote:

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On Fri, Aug 20, 2010 at 05:29:31PM +0800, Woody Dickson wrote:

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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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