From owner-freebsd-xen@FreeBSD.ORG Mon Apr 28 17:56:23 2014 Return-Path: Delivered-To: freebsd-xen@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 2711685D for ; Mon, 28 Apr 2014 17:56:23 +0000 (UTC) Received: from mail-we0-x233.google.com (mail-we0-x233.google.com [IPv6:2a00:1450:400c:c03::233]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id B106F1BB2 for ; Mon, 28 Apr 2014 17:56:22 +0000 (UTC) Received: by mail-we0-f179.google.com with SMTP id x48so6799356wes.10 for ; Mon, 28 Apr 2014 10:56:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=M+RYB/lwQt6dxqRrdO11bht2Cd1aTpBGsF7tc0a89kk=; b=DICM8jwQuYN23Z8jaXJ4a+zlLZpAp4LtuGJSIcuWYt59PTXpyyiUpM5EQMR6X1VCbA G7z5yR8XJaeL9T+Ku7jnSZ7guwoWHWSRSpxNkMdWX+sG+HpdWwcKN67mKlILvePtAsR3 gFbao4ytpCbq/x/RkL+uyOVyaml9fP70M94xOCW+8JU+4LeeWVeb/N5+3QALOcwRZS/K CUtmSfR8fURBs5G7bxf4PMwzGucHXEYScPw1dxf0YtWkmi7t4FfC6HTLdFM/Qdyfw6Xn 36IvSaIXQA6GS2dDYxQIRiezN+IZ7UAQ19eXnS1ImXxUUy+PCJWoRXJzou8URLrGM6fJ VlUQ== MIME-Version: 1.0 X-Received: by 10.180.39.175 with SMTP id q15mr16569176wik.4.1398707780938; Mon, 28 Apr 2014 10:56:20 -0700 (PDT) Received: by 10.216.61.203 with HTTP; Mon, 28 Apr 2014 10:56:20 -0700 (PDT) In-Reply-To: <535BA152.6080300@citrix.com> References: <53567847.10203@citrix.com> <535BA152.6080300@citrix.com> Date: Mon, 28 Apr 2014 18:56:20 +0100 Message-ID: Subject: Re: VM in Xen 4.1; poor packet forwarding performance on xn0 From: "seanrees@gmail.com" To: =?UTF-8?Q?Roger_Pau_Monn=C3=A9?= Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.17 Cc: "freebsd-xen@freebsd.org" X-BeenThere: freebsd-xen@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: Discussion of the freebsd port to xen - implementation and usage List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 28 Apr 2014 17:56:23 -0000 Hi Roger, This is what they provided me: - The Xen 4.x node is running a custom 3.1.1 kernel. - The Xen 3.x node is running a 2.6.18 kernel. They didn't elaborate on the customisations. :( Sean On Sat, Apr 26, 2014 at 1:06 PM, Roger Pau Monn=C3=A9 wrote: > On 26/04/14 13:57, seanrees@gmail.com wrote: > > Hi Roger, > > > > Thanks for the patch -- sadly, it didn't work. No change. > > Hello, > > > > > I did have to modify a bit for releng/10.0; for some reason patch > > refused to apply it cleanly. It looked fairly straightforward but I > > attached inline the patch I ultimately applied below just in case I got > > it wrong. > > Patch looks fine. > > > Are there any other potential differences between Xen 3.4 and 4.1? (my > > provider migrated my problem VPS to a 3.4 host and the problem > > evaporated; I am trying this on a new 4.1 VPS that I was able to > > reproduce the problem on). > > I'm quite sure this is not related to the underlying Xen version, but to > the Linux Dom0 kernel version your provider is using, could you ask them > the Linux versions they are using on the 4.1 and 3.4 hosts? > > Roger. >