From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nuutti Kotivuori Date: Sat, 06 Mar 2004 15:33:58 +0000 Subject: Re: [LARTC] Re: Blue and SFB Message-Id: <877jxyxa55.fsf@iki.fi> List-Id: References: <87ishkzpf5.fsf@iki.fi> In-Reply-To: <87ishkzpf5.fsf@iki.fi> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lartc@vger.kernel.org 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. 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. 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. -- Naked _______________________________________________ LARTC mailing list / LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/