Re: [Sipp-users] Performance tips

Peter Higginson Tue, 12 Sep 2006 00:06:17 -0700

I believe CPU CONGESTED means that the triggered actions are using too much time relative to the polling loop. Probably not much you can do about it. In my local version I have changed the inner pool loop to a switch which helps a little but you would probably have to attack the Call-ID map to get greater efficiency.

One thing to watch if the UAS is using excessive time is that calls are not getting hung. For example the UAC times out a BYE and that “call” is still in the tables at the UAS – that can result in the call still being active at the UAS. I have seen cases with 50K calls at the UAC and 250K calls at the UAS. The UAS is still scanning all the 250K calls in its tables.

There was nothing attached by me – I think Sourceforge adds them.

Peter

Peter Higginson

Newport Networks Ltd,

Direct line 01494 470694

http://www.newport-networks.com/

From: Eyal Czitron [mailto:[EMAIL PROTECTED]
Sent: 12 September 2006 05:49
To: Peter Higginson
Subject: RE: [Sipp-users] Performance tips

Hello,

Thanks for you answer but I can’t any solution to the “CPU CONGESTED” problem that I have, any idea?

I saw that you attached some files but I can’t get them because they were blocked, can you please zip them and send me again?

Thanks

Eyal Czitron: Followap

PSP QA Engineer
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From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Peter Higginson
Sent: Tuesday, September 12, 2006 12:46 AM
To: [email protected]
Subject: Re: [Sipp-users] Performance tips

One thing I find is that SIPP is essentially single threaded – so on a Dual Core (or Hyperthreaded) system you only really use one CPU, which is where I suspect your 50% comes from. We would normally run UAS and UAC on a single system – which uses both CPUs.

Then to scale use multiple systems – emulating multiple destinations of course – it depends on exactly what you are trying to test.

Peter

Peter Higginson

Newport Networks Ltd,

Direct line 01494 470694

http://www.newport-networks.com/

From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Eyal Czitron
Sent: 05 September 2006 10:54
To: [EMAIL PROTECTED]
Subject: [Sipp-users] Performance tips

Hi, fellow sipp users.

 I've been testing with sipp for some time now and I would like to know what

 are there some kind of tricks to make it perform better on my system. I've

 read the manual and I know about the -timer_resol, -max_recv_loops and

 -up_nb commands. I have tried different variations, like decreasing the

 max_recv_loops value and increasing the up_nb value, but I don't seem to

 gain much performance with that. Especially I have problems with the UAS

 scenario, that shows CPU congested basically all the time. I'm using two

 P4's with 3,6GHz CPU and 2GB of DDR2 RAM. Other one is running the UAC and

 other the UAS scenario. I'm getting about 3000 calls/second, connecting

 directly between two sipps.

 UAS scenario is bugging me since it shows CPU congested and the CPU load is

 somewhere around 50%. Could someone give me a hint on what values of

 -timer_resol, -max_recv_loops and -up_nb I could try on my system? What kind

 of values are you getting and with what kind of systems?

 Regards,

Eyal Czitron: Followap

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