Re: [gtk-gnutella-devel] Bandwidth's measurement is completely wrong (maybe relative?)

[Bill P. <bpr...@sy...>]

gionnico wrote:
 
>> It turns out to be about 30-50% of the real used bandwidth.

On 20 Jan 2008, chr...@gm... wrote:

> The problem is, that happens on layer to which we have almost no
> access and all interfaces which exists to those layers typically
> require super-user privileges. In theory, most of your traffic might
> consist of retransmitted segments and ACKs but on our layer, we see
> none of that, we only see the effective payload and its transfer
> rates.

Do we count the IP headers?  That is tough, because it could be PPPxx
with IP layer compression, etc.  My guess is that gtkg count the
payload bytes only.

I have definitely set my bw setting emprirically.  Ie, I look at iftop
output and change gtkg bw limits to get near saturation of the link.
The gtkg limits are lower than the actual bw consumed.

fwiw,
Bill Pringlemeir.