/* - use master clock (not sound device) for the clock source, since sound device may be disturbed by high CPU load and CPU spikes. - use clock rate 8000 Hz for the master clock (or conf bridge, if you use it) to avoid resampling. */ Thanks very much for this complete answer. I didn't understand what you mean with 'use master clock'. I don't user any hardware but only your wav_player methods. The clock rate is 8000 Hz by default, isn't it ? Regards, Frederic Nanang Izzuddin a ?crit : > Hi, > > G711 is very low complexity codec (see > http://trac.pjsip.org/repos/wiki/PJMEDIA-MIPS, stream with G711 in P3 > 700MHz only cost < 0.1% CPU), so the codec shouldn't be the problem. > Also your CPU utilization seems to be relatively low (although it > supposed to be lower than 30%). So it's not the CPU limitation. > > Please see this, in case you haven't: > https://trac.pjsip.org/repos/wiki/FAQ#high-perf. > And also please try this, in case you haven't: > - use master clock (not sound device) for the clock source, since > sound device may be disturbed by high CPU load and CPU spikes. > - use clock rate 8000 Hz for the master clock (or conf bridge, if you > use it) to avoid resampling. > > Btw, is there any chance that the problem is in the caller/tester > (e.g: the app tester can only handle 20 concurrent calls, so you > should run 2 instances of app tester on 2 different machines)? > > Regards, > nanang > > > On 03/09/2008, Fr??d??ric CLEMENT <fclement at viatelecom.com> wrote: > >> My Load average is about 1.00 (34 % CPU utilization). >> The codec I am using is Alaw (g711). >> Can I expect to handle 100 calls with a Core2Duo or QuadCore Xeon ? >> >> Should I user another codec ? My switch have many implemented. (Dialogic >> Cantata IMG). >> >> Regards, >> >> Frederic >> >> >> Nanang Izzuddin a ?crit : >> Hi, >> > > Which codec are you using? How about the CPU utilization? Since > >> it's >> > may be caused by CPU limitation in doing media processing > >> (especially >> > encoding). > > Regards, > nanang > > > On 03/09/2008, Fr??d??ric CLEMENT > >> <fclement at viatelecom.com> wrote: >> > > >> Hi again all, >> > > I am still building an IVR server and testing the max > >> possible account of >> > calls that can be handled by pjsip. > I set > >> PJSUA_MAX_CALLS to 100 >> > The value inf config_site.h for > >> PJMEDIA_SOUND_BUFFER_COUNT is set to 16. >> > My application just take calls and > >> play a sound file looped. I use the pjsua >> > high level methods > >> (pjsua_player_create ....) >> > The machine is a Pentium IV 1.9 Ghz with enough > >> memory. >> > > When I send 20 calls, the sound stays being correct. > > If I send 30 > >> simultaneous calls, I get the same result than described on >> > your site > >> : >> > > http://trac.pjsip.org/repos/wiki/audio-problem-dropouts > > The > >> sound I have is the same than the stutter.wav found >> there. >> > > http://trac.pjsip.org/repos/attachment/wiki/audio-problem-dropouts/stutter.wav > > Wich > >> optimisations can be done ? My goal is about 100 simultaneous >> calls. >> > > Regards, > > Frederic > > (Sorry again for my very bad > >> english) >> > > _______________________________________________ > Visit > >> our blog: http://blog.pjsip.org >> > > pjsip mailing > >> list >> > pjsip at lists.pjsip.org > http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org > > > > >> _______________________________________________ >> > Visit our > >> blog: http://blog.pjsip.org >> > > pjsip mailing > >> list >> > pjsip at lists.pjsip.org > http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org > >> _______________________________________________ >> Visit our blog: http://blog.pjsip.org >> >> pjsip mailing list >> pjsip at lists.pjsip.org >> http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org >> >> >> >> > > _______________________________________________ > Visit our blog: http://blog.pjsip.org > > pjsip mailing list > pjsip at lists.pjsip.org > http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org > -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20080903/8eca4af6/attachment-0001.html -------------- next part -------------- A non-text attachment was scrubbed... Name: fclement.vcf Type: text/x-vcard Size: 389 bytes Desc: not available Url : http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20080903/8eca4af6/attachment-0001.vcf
