From: Juliusz Chroboczek <Juliusz.Chroboczek@pps.jussieu.fr>
To: Patrick McHardy <kaber@trash.net>
Cc: netdev@vger.kernel.org
Subject: Re: [PATCH] Stochastic Fair Blue queue discipline
Date: Tue, 08 Apr 2008 17:28:48 +0200 [thread overview]
Message-ID: <7i7if8bc27.fsf@lanthane.pps.jussieu.fr> (raw)
In-Reply-To: <47FAB688.7010807@trash.net> (Patrick McHardy's message of "Tue\, 08 Apr 2008 02\:04\:24 +0200")
> I experienced with SFB myself some time ago and recall
> getting huge unfairness towards non-ECN connections.
I've only done informal checking, but didn't test ECN against non-ECN.
Will do, and I'll let you know the results.
> I just found my old tree and it was just Blue, which might explain this
Blue is supposed to be roughly fair w.r.t. TCP-compliant flows with
similar RTT. If you see long-term unfairness with Blue at a single
RTT, then something is wrong at the sender. I'll see if I can repeat
your issues.
Earlier versions of Linux did not reduce their sending rate when they
received ECE and the congestion window was just 1 MSS. I don't know
if this bug has been fixed.
Juliusz
next prev parent reply other threads:[~2008-04-08 15:56 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-07 22:37 [PATCH] Stochastic Fair Blue queue discipline Juliusz Chroboczek
2008-04-08 0:04 ` Patrick McHardy
2008-04-08 0:56 ` Patrick McHardy
2008-04-08 15:28 ` Juliusz Chroboczek [this message]
2008-04-08 8:20 ` Andi Kleen
2008-04-08 12:11 ` Patrick McHardy
2008-04-08 15:39 ` Juliusz Chroboczek
2008-04-08 15:45 ` Patrick McHardy
2008-04-09 15:48 ` Juliusz Chroboczek
2008-04-09 16:00 ` Patrick McHardy
2008-04-08 15:38 ` Juliusz Chroboczek
2008-04-08 16:32 ` Andi Kleen
2008-04-08 17:35 ` Juliusz Chroboczek
2008-04-08 17:53 ` Andi Kleen
2008-04-09 15:45 ` Juliusz Chroboczek
2008-04-09 17:49 ` Andi Kleen
2008-04-10 1:23 ` Patrick McHardy
2008-04-10 1:38 ` Patrick McHardy
2008-04-10 11:17 ` Juliusz Chroboczek
2008-04-11 13:07 ` Patrick McHardy
2008-04-10 14:04 ` Stephen Hemminger
2008-04-10 7:36 ` Andi Kleen
2008-04-08 16:44 ` Patrick McHardy
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