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Date:      Mon, 28 Apr 2014 18:56:20 +0100
From:      "seanrees@gmail.com" <seanrees@gmail.com>
To:        =?UTF-8?Q?Roger_Pau_Monn=C3=A9?= <roger.pau@citrix.com>
Cc:        "freebsd-xen@freebsd.org" <freebsd-xen@freebsd.org>
Subject:   Re: VM in Xen 4.1; poor packet forwarding performance on xn0
Message-ID:  <CAJGy1F337CrLqQubq1PBN6Xy7JoqvS42__gOcMHQnfa3MdFUGA@mail.gmail.com>
In-Reply-To: <535BA152.6080300@citrix.com>
References:  <CAJGy1F0%2BG1zq9hVbifTM2Vq6HHEmCM9hnFvQ=4t-4d5x=npaCA@mail.gmail.com> <53567847.10203@citrix.com> <CAJGy1F3hcAXi4xh3Yd-QEoWrWuJb2%2BGfmZG1x9tVFS4Qo7ar9w@mail.gmail.com> <535BA152.6080300@citrix.com>

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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 <roger.pau@citrix.com=
>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.
>



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