<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, &quot;Dominik Holler&quot; &lt;<a href="mailto:dholler@redhat.com">dholler@redhat.com</a>&gt; 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 &lt;<a href="mailto:ykaul@redhat.com">ykaul@redhat.com</a>&gt; wrote:<br>
<br>
&gt; On Mon, Dec 11, 2017 at 8:21 PM, Beau Sapach &lt;<a href="mailto:bsapach@ualberta.ca">bsapach@ualberta.ca</a>&gt;<br>
&gt; wrote:<br>
&gt;<br>
&gt; &gt; Yes, we&#39;ve done some testing.  With an oVirt VM running on a host<br>
&gt; &gt; using 10Gb ethernet copying data to a physical machine also using<br>
&gt; &gt; 10Gb ethernet we don&#39;t see network utilization exceed 800Mbits or<br>
&gt; &gt; so.  A bit of research online yields some experimentation done by<br>
&gt; &gt; others who used SR-IOV to achieve 10Gb from a VM.<br>
&gt; &gt;<br>
&gt;<br>
&gt; 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>
&gt; Y.<br>
&gt;<br>
&gt;<br>
&gt; &gt; I&#39;m not sure where the bottleneck is, possibly in the VirtIO driver.<br>
&gt; &gt;<br>
&gt; &gt; Beau<br>
&gt; &gt;<br>
&gt; &gt; On Mon, Dec 11, 2017 at 1:23 AM, Dominik Holler &lt;<a href="mailto:dholler@redhat.com">dholler@redhat.com</a>&gt;<br>
&gt; &gt; wrote:<br>
&gt; &gt;<br>
&gt; &gt;&gt; Is there an indication that the VMs will not take advantage of<br>
&gt; &gt;&gt; 10Gb?<br>
&gt; &gt;&gt;<br>
&gt; &gt;&gt; On Thu, 7 Dec 2017 15:27:25 -0700<br>
&gt; &gt;&gt; Beau Sapach &lt;<a href="mailto:bsapach@ualberta.ca">bsapach@ualberta.ca</a>&gt; wrote:<br>
&gt; &gt;&gt;<br>
&gt; &gt;&gt; &gt; Hello everyone,<br>
&gt; &gt;&gt; &gt;<br>
&gt; &gt;&gt; &gt; I see here:<br>
&gt; &gt;&gt; &gt; <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>
&gt; &gt;&gt; &gt; version 4.2 will have OVN support.  Does anyone know if this will<br>
&gt; &gt;&gt; &gt; allow VMs to take advantage of 10Gb networking without needing<br>
&gt; &gt;&gt; &gt; SR-IOV?<br>
&gt; &gt;&gt; &gt;<br>
&gt; &gt;&gt; &gt;<br>
&gt; &gt;&gt;<br>
&gt; &gt;&gt;<br>
&gt; &gt;<br>
&gt; &gt;<br>
&gt; &gt; --<br>
&gt; &gt; Beau Sapach<br>
</div>&gt; &gt; *System Administrator | Information Technology Services |<br>
&gt; &gt; University of Alberta Libraries*<br>
&gt; &gt; *Phone: <a href="tel:780.492.4181" value="+17804924181">780.492.4181</a> &lt;(780)%20492-4181&gt; | Email:<br>
&gt; &gt; <a href="mailto:Beau.Sapach@ualberta.ca">Beau.Sapach@ualberta.ca</a> &lt;<a href="mailto:Beau.Sapach@ualberta.ca">Beau.Sapach@ualberta.ca</a>&gt;*<br>
<div class="elided-text">&gt; &gt;<br>
&gt; &gt;<br>
&gt; &gt; ______________________________<wbr>_________________<br>
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&gt; &gt;<br>
&gt; &gt;<br>
<br>
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