[Ccrtp-devel] performance and lower level api?

[Thomas Raschbacher]

Hi.

I've written some test apps which we want to use to evaluate ccRTPs performance.
It is mostly a re-written rtphello application where I mainly changed 2 things:
1) the transceiver had X destinations (command line parameter)
2) the receiver has X RTPSessions which are organized in a std::list (I don't 
do anything with the data apart from getData() and then delete it)

It now seems that if I start it with 360 or more RTP sessions it can hardly 
handle the load on my devel machine (recent P4 Dual core with 2GB memory).
If I use more ports than that then my (very simple) loop (see below) doesn't 
seem to be able to handle it anymore as both CPUs are permanently on 100% -> 
memory consumption goes up from ~ 5MB to 700+ (I killed the process then)

while (true)
        {

                        for (it_lRTPSession it = m_Sessions.begin(); it != 
m_Sessions.end(); ++it)
            {
                const AppDataUnit *adu = NULL;
                            while ( NULL == adu )
                {
                                    adu = 
(*it)->getData((*it)->getFirstTimestamp());
                    delete adu;
                            }
            }
            Thread::sleep(5);
                }

I'm using MS Visual Studio 2008 btw.

So now I'm wondering .. am I doing something wrong and there is a more 
efficient way to handle that many connections or is RTPSession just not fast 
enough (due to the queues,..) If the problem is with RTPSession is there a 
lower level api which I could potentially get better performance with (and 
which is relatively easy to use? - I don't mind implementing the timers,.. 
myself)

Regards,

Mit freundlichen Grüßen
Thomas Raschbacher
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