<div dir="auto">Beau, have you solved your performance problem already?<div dir="auto"><br></div><div dir="auto">Would you share what is the MTU you have set on the underlying network, and in your VMs?</div><br><div class="gmail_extra" dir="auto"><br><div class="gmail_quote">On Dec 13, 2017 17:41, "Dominik Holler" <<a href="mailto:dholler@redhat.com">dholler@redhat.com</a>> wrote:<br type="attribution"><blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="quoted-text">On Tue, 12 Dec 2017 23:12:12 +0200<br>
Yaniv Kaul <<a href="mailto:ykaul@redhat.com">ykaul@redhat.com</a>> wrote:<br>
<br>
> On Mon, Dec 11, 2017 at 8:21 PM, Beau Sapach <<a href="mailto:bsapach@ualberta.ca">bsapach@ualberta.ca</a>><br>
> wrote:<br>
><br>
> > Yes, we've done some testing. With an oVirt VM running on a host<br>
> > using 10Gb ethernet copying data to a physical machine also using<br>
> > 10Gb ethernet we don't see network utilization exceed 800Mbits or<br>
> > so. A bit of research online yields some experimentation done by<br>
> > others who used SR-IOV to achieve 10Gb from a VM.<br>
> ><br>
><br>
> Are you using multiple TCP streams, jumbo frames, threads, etc.?<br>
<br>
</div>Please verify that the expected interface is used. The automatic<br>
configuration uses ovirtmgmt to transport the data.<br>
This can be changed manually by executing<br>
<br>
vdsm-tool ovn-config IP_OF_OVN_CENTRAL IP_OF_LOCAL_INTERFACE<br>
<br>
on the host.<br>
<br>
Are you using NICs which supports GENEVE offloading?<br>
<div class="quoted-text"><br>
<br>
> Y.<br>
><br>
><br>
> > I'm not sure where the bottleneck is, possibly in the VirtIO driver.<br>
> ><br>
> > Beau<br>
> ><br>
> > On Mon, Dec 11, 2017 at 1:23 AM, Dominik Holler <<a href="mailto:dholler@redhat.com">dholler@redhat.com</a>><br>
> > wrote:<br>
> ><br>
> >> Is there an indication that the VMs will not take advantage of<br>
> >> 10Gb?<br>
> >><br>
> >> On Thu, 7 Dec 2017 15:27:25 -0700<br>
> >> Beau Sapach <<a href="mailto:bsapach@ualberta.ca">bsapach@ualberta.ca</a>> wrote:<br>
> >><br>
> >> > Hello everyone,<br>
> >> ><br>
> >> > I see here:<br>
> >> > <a href="https://www.ovirt.org/blog/2017/09/introducing-ovirt-4.2.0/" rel="noreferrer" target="_blank">https://www.ovirt.org/blog/<wbr>2017/09/introducing-ovirt-4.2.<wbr>0/</a> that<br>
> >> > version 4.2 will have OVN support. Does anyone know if this will<br>
> >> > allow VMs to take advantage of 10Gb networking without needing<br>
> >> > SR-IOV?<br>
> >> ><br>
> >> ><br>
> >><br>
> >><br>
> ><br>
> ><br>
> > --<br>
> > Beau Sapach<br>
</div>> > *System Administrator | Information Technology Services |<br>
> > University of Alberta Libraries*<br>
> > *Phone: <a href="tel:780.492.4181" value="+17804924181">780.492.4181</a> <(780)%20492-4181> | Email:<br>
> > <a href="mailto:Beau.Sapach@ualberta.ca">Beau.Sapach@ualberta.ca</a> <<a href="mailto:Beau.Sapach@ualberta.ca">Beau.Sapach@ualberta.ca</a>>*<br>
<div class="elided-text">> ><br>
> ><br>
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> ><br>
> ><br>
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