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Re: [Xen-users] Bad TCP accept performance

To: Carl Byström <cgbystrom@xxxxxxxxx>
Subject: Re: [Xen-users] Bad TCP accept performance
From: Pasi Kärkkäinen <pasik@xxxxxx>
Date: Wed, 25 May 2011 08:54:36 +0300
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On Tue, May 24, 2011 at 11:46:17PM +0200, Carl Byström wrote:
>    On Mon, May 23, 2011 at 10:22 PM, Pasi Kärkkäinen <[1]pasik@xxxxxx> wrote:
>      - Did you try giving dom0 and the VM dedicated cpu cores? Did that help?
>       (See [2]http://wiki.xen.org/xenwiki/XenBestPractices)
>      - Can you use Xen PCI passthru to dedicate a physical NIC to the VM ?
>    I haven't tried that, no. The dom0 is hosting other infrastructural
>    servers so will need to get hold of our sysadmin to help me with this.
>    Will get back to you.
>      - Can you post your benchmark numbers.. we need more info so we know
>       what kind of numbers are we talking about. Also post the specs
>       of your hardware and also full software/kernel/xen versions.
>    I maintain a list of benchmark numbers
>    at [3]https://gist.github.com/985475
>    Submitted by myself and other users. It includes OS versions but not Xen
>    version, will try to find out.
>    Also tried this on EC2 with discouraging results as well.
>    Russ, I tried this using only local loopback ( to minimize any
>    external factors. Does that make a difference to what you were suggesting?
>    Appreciate any help I can get on this.

Btw did you use 64bit or 32bit VMs? I'd suggest to try 32bit aswell if you 

-- Pasi

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