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From: Nuutti Kotivuori <naked@iki.fi>
To: lartc@vger.kernel.org
Subject: Re: [LARTC] Re: Blue and SFB
Date: Sat, 06 Mar 2004 15:33:58 +0000	[thread overview]
Message-ID: <877jxyxa55.fsf@iki.fi> (raw)
In-Reply-To: <87ishkzpf5.fsf@iki.fi>

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

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  parent reply	other threads:[~2004-03-06 15:33 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-03-04 13:56 [LARTC] Re: Blue and SFB Nuutti Kotivuori
2004-03-04 14:05 ` Patrick McHardy
2004-03-06 15:09 ` Patrick McHardy
2004-03-06 15:33 ` Nuutti Kotivuori [this message]
2004-03-06 15:59 ` Patrick McHardy

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