[asterisk-users] Capacity for transcode G711 to G729

[Mark Phillips]

What tools are you using for this? 

I'm sure you are aware of SIPp but wondered if you had anything else?

Mark

On Thu, 2006-09-07 at 21:41 +0200, Matt Riddell (IT) wrote:
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> RR wrote:
> > Hi matt,
> > 
> > sorry this might be a stupid question but is a bit pertinent to me,
> > I'd asked something similar in one of my last email regarding SMP. Do
> > you know if (*) is capable of making use of HT support i.e is
> > multi-threaded and improves performance for operations like
> > transcoding? Is that a valid question or is this only dependant on the
> 
> I don't think you will get double or anything, in fact many people have
> suggested that HT be turned off when people experience problems.
> 
> > OS/Kernel, the CPU itself and the chipset on the motherboard? If I
> > boot into an SMP kernel with Asterisk compiled with the SMP kernel
> > source, would it just make use of multi-threading as the load
> > increases on cpu-intensive operations?
> 
> The best use I have seen is the newly converted IAX2 which can use
> multithreading in version 1.4, the beta of which should be released
> later this week.
> 
> The best idea would be to compile Asterisk, run some tests (show
> translation recalc 60) with HT turned on, restart the box, bring it up
> with HT turned off and try again.
> 
> You should also run a few calls and check the CPU.
> 
> > Also, when you said the normal is 120 simultaneous transcoding
> > operations, what is "normal"? I have a P4 w/HT 3.4Ghz, 2GB RAM
> > machine. Would that be above or below "normal"?
> > 
> > Thanks much
> > \R
> 
> I would think that is above normal but not by much, I'm not sure what
> "normal" was, nor can I find the Digium document where this was stated.
> 
> It wasn't that long ago.
> 
> I'm doing some more tests on a 3000 line setup (external DS3s via
> Asterisk and SER clusters) at the moment which we are splitting to be
> half G.729 and half ulaw, and I will try to post some results.
> 
> - --
> Cheers,
> 
> Matt Riddell
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