Nuutti Kotivuori wrote:
> Patrick McHardy wrote:
> 
>>I've completed the port and tested it yesterday, unfortunately it's
>>not useable in the real world as is. There is a strong bias against
>>non-ECN flows because their packets are simply dropped instead of
>>marked. At high load (50 ECN vs. 1 non-ECN flow) and a marking
>>probability of about 10% the non-ECN flow simply stalls.
>>I can send you the patch if you're interested ..
> 
> 
> Thank you, I am really interested.

Patch is attached. Use the original tc patch.

> 
> I will try how it behaves for me in various circumstances.
> 
> What you say, though, is probably true - and the situation is even
> more accentuated when considering that different TCP stacks react to
> ECN and packet drops differently - a single drop percent will not be
> enough.

OTOH, with only ECN flows it works great, not a single packet
drop after a couple of minutes, without BLUE there were multiple
thousands.

> Which ofcourse brings us to SFB - with Stochastic Fair Blue, the drop
> percentage for the non-ECN flow should be significantly lower and the
> connections should transfer more or less fairly.

I'm going to check this out, don't know anything about it.

Regards
Patrick

> 
> -- Naked
>