[ovirt-users] oVirt 4 and 10GbE NICs

[Yaniv Kaul]

On Tue, Mar 14, 2017 at 12:57 PM Davide Ferrari <davide at billymob.com> wrote:

> Hello
>
> the oVirt hosts in my cluster have all 10GbE interfaces (bonded 2 by 2),
> and I was wondering if a single Linux VM with a virtio interface can reach
> for example 8Gbps.
>

Are you able from the host, first of all?


>
> I'm asking because I'm seeing a 100% network usage in some VMs in ovirt VM
> dashboard but the real traffic in that VM is between 1-2Gbps.
>

You might be able to, but it's not easy. You'll need to use NUMA and set
correctly the vCPUs pinning, perform correct tuning (multiple queues) and
so on.  With SR-IOV I assume there's a better chance (lower latency), btw.

Traffic shown in the dashboard is averaged, is it a sustained 8Gbps or
bursty?
Y.


> Thanks
>
> --
> Davide Ferrari
> Senior Systems Engineer
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