[asterisk-biz] Asterisk Performance Results

[Zoa]

16mb/s is indeed half of what i would expect. (missed those figures)
I didn't read the pdf that good, but sipp is making the call and is 
calling to another sipp, is that second sipp also sending audio ?

Zoa

Trixter aka Bret McDanel wrote:
>
>
> On 11/16/07, *Jim Dalton* <jim.dalton at transnexus.com 
> <mailto:jim.dalton at transnexus.com>> wrote:
>
>     Each call has two legs: one call leg inbound to the B2BUA and one
>     call leg
>     outbound from the B2BUA.
>
>     1500/400 calls
>     3000/800 call legs
>
>
>
> I have been going through the PDF a bit and that prompted me for some 
> questions.
>
> On page 48-50 you list "Test Rate (cps)" as 1-8,5.  Is the highest cps 
> you did was 8.5?  That seems low, especially with the 180 second ALOC 
> (please verify that there was a reference to a 180 second pcap file).
>
> For 1 cps you have 600 completed calls but 3000 OSP CDRs why is there 
> a 5:1 ratio on that?
>
>
> Bandwidth utilization to calls:
> CPS                     1          2         3        4         5    
>       6         7         8        8.5
> total calls           600    1200   1800   2400   3000   3600   
> 4200    4800    5100
> simultaneous*    185      369    556     741     924    1113   1293    
> 1474    1563
> MB one side*         2          4        6         8        10       
> 12       14        16        16
> * I rounded to be easier
> Depending on ptime and other factors G.711 can take a varying amount 
> of bandwidth generally 80-90kbps, so if we were to take the reported 
> bandwidth usage, multiply by 8000 (to make it kbits) and divide by 
> lets say 85 as an average for overhead inclusion we can arrive at how 
> many channels actually could have done media.
>
> 2*8000/85=188  ok, so that is close to what sipp reports
> 4*8000/85=376 again very close to what sipp reports
> 16*8000/85=1505, really close to your 8/8.5cps (remember I did round 
> numbers and am estimating usage)
>
> The bandwidth is reported as the "asterisk server" which would see 
> both legs, and thus should have 2x the bandwidth for the concurrent 
> call count, not half.  Why does the bandwidth used seem to indicate 
> that only one leg had media, or is that correct and only one leg had 
> media?  Yes its broken into Tx/Rx but for each leg you would Tx/Rx the 
> amount listed and it appears like half the media is missing.  Were you 
> only monitoring one interface and didnt report on the other?
>
>
> -- 
> Trixter http://www.0xdecafbad.com     Bret McDanel
> Belfast +44 28 9099 6461        US +1 516 687 5200
> http://www.trxtel.com <http://www.trxtel.com> the phone company that 
> pays you!
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