From mboxrd@z Thu Jan 1 00:00:00 1970 From: Raphael Hertzog Subject: Re: Constantly varying download rate with a complex xen networking setup, why? Date: Wed, 17 Jun 2009 16:36:47 +0200 Message-ID: <20090617143647.GD18586@rivendell> References: <20090615075313.GA22819@rivendell> <20090615160254.GA8550@rivendell> <20090617130050.GA18586@rivendell> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: Netdev To: Ilpo =?iso-8859-15?Q?J=E4rvinen?= Return-path: Received: from arrakeen.ouaza.com ([212.85.152.62]:48969 "EHLO arrakeen.ouaza.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755385AbZFQOgs (ORCPT ); Wed, 17 Jun 2009 10:36:48 -0400 Content-Disposition: inline In-Reply-To: Sender: netdev-owner@vger.kernel.org List-ID: Le mercredi 17 juin 2009, Ilpo J=E4rvinen a =E9crit : > On Wed, 17 Jun 2009, Raphael Hertzog wrote: >=20 > > Le lundi 15 juin 2009, Ilpo J=E4rvinen a =E9crit : > > > Maybe the proxy interferes there somehow... I don't know enough a= bout the > > > details to say but I suppose the proxy at least breaks your tcp c= onnection=20 > > > to two parts. > >=20 > > Indeed. Is there some processing done in a simple linux bridge wher= e the > > reapperance of the same TCP packet that has been created and sent o= n another > > local interface could create problem? >=20 > I thought out had a http proxy in between? I suppose it is certainly = doing=20 > more than bridging. Anyway, I'll be week away, so no quick responses = are=20 > to be expected from my part after this mail. Well, I have the problem when I don't use the proxy... if I use it, the download is split over two TCP connections and things are fine. Hence my question was if something could be confused by the fact that t= he same packet is seen twice on the same machine once (in output) via eth2= /xenbrD and once (in forward) via xenbrE (the routing between both bridges is d= one by the domU independently of the dom0 network config). Cheers, --=20 Rapha=EBl Hertzog -+- http://www.ouaza.com =46reexian : des d=E9veloppeurs Debian au service des entreprises http://www.freexian.com