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Re: [Xen-users] How to know the network limits?

  • To: Xen User-List <xen-users@xxxxxxxxxxxxxxxxxxx>
  • From: "Fajar A. Nugraha" <fajar@xxxxxxxxx>
  • Date: Wed, 5 Aug 2009 09:57:00 +0700
  • Delivery-date: Tue, 04 Aug 2009 19:57:58 -0700
  • List-id: Xen user discussion <xen-users.lists.xensource.com>

On Tue, Aug 4, 2009 at 9:07 PM, Jordi Espasa
Clofent<jespasac@xxxxxxxxxxxx> wrote:
> I answer myself:
> * the network limit (in interruptions sense) is the physical NIC limit,
> because of all the level 2 happens in dom0.

Is it?
Last time I check, transfer between domU <-> dom0 (which is all on
virtual interfaces, involving vif and bridge) on a somewhat old
machine (an old Xeon 3.2 GHz) got me around 1-2 Gbps with 100% CPU
usage. So when you have -- say -- a 10Gbps NIC, the physical NIC is no
longer the limiting factor.


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