[Asterisk-Dev] G.729 MIPS calculation

[Daniel Pocock]

I just tried the IPP stuff on a HP DL140, dual 3.0GHz, the codec compile 
is optimized for Xeon and statically linked.

'show translation recalc 200' showed me that compress from slinear to 
G729 was 6ms and decompress was 1ms or less. 

That's a total of 7ms to handle 1000ms of audio full duplex.

Does that mean that 1000ms / 7ms = 142 is the number of channels this 
server could handle simultaneously, or is there other overhead to consider?





Steve Underwood wrote:

> Miroslav Nachev wrote:
>
>>   Hi,
>>
>>   I would like to meter the MIPS for G.729 implementation using Intel
>> IPP. Can you help me how to do that?
>>  
>>   Best Regards,
>>   Miroslav Nachev
>>  
>>
> For 1 Rx channel + 1 Tx channel, G.729 typically takes 10 to 20MIPs on 
> a DSP, depending how you count MIPs, and what the DSP chip is. It 
> typically takes 80 to 100MIPs on a Pentium, depending on the 
> implementation. The IPP stuff doesn't make a huge difference, as it 
> doesn't seem to speed things up a great deal. On a 3GHz Pentium you 
> can typically run about an E1's worth of G.729 channels. A really 
> efficient version might get you to 2 E1s, but I haven't seem one that 
> quite gets that far.
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