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Re: [Xen-users] dom0 using only a single CPU (networking)
| To: | fabi.a169@xxxxxxxxx |
|---|---|
| Subject: | Re: [Xen-users] dom0 using only a single CPU (networking) |
| From: | Bastian Blank <bastian@xxxxxxxxxxxx> |
| Date: | Sat, 20 Dec 2008 17:31:47 +0100 |
| Cc: | xen-users@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Sat, 20 Dec 2008 08:32:28 -0800 |
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On Fri, Dec 19, 2008 at 10:31:54PM +0100, fabi.a169@xxxxxxxxx wrote:
> I'm using a server with 10Gbps network interfaces and 4 CPUs, running
> several domUs. The problem is that in this setup, with high network load,
> dom0 turns out to be the bottleneck, using only a single CPU which is
> saturated and 100%. So the network speed is bounded to much less than
> 10Gbps. How could I make dom0 use more CPUs in parallel ?
In short, you can't. The Linux network stack uses polling to handle high
load, however this can only run on one CPU at a time.
> If you have any idea, thank you for sharing your experience.
What sort of service do you run which can fill a 10GBit connection and
is able to be virtualized at the same time?
Bastian
--
The idea of male and female are universal constants.
-- Kirk, "Metamorphosis", stardate 3219.8
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