<div dir="auto"><div><br><div class="gmail_extra"><br><div class="gmail_quote">On Jul 28, 2017 8:51 AM, "John Petrini" <<a href="mailto:jpetrini@coredial.com">jpetrini@coredial.com</a>> wrote:<br type="attribution"><blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi Saverio,<div><br></div><div>Thanks for the info. The parameter is missing completely:</div><div><br></div><div><div> <interface type='bridge'></div><div> <mac address='fa:16:3e:19:3d:b8'/></div><div> <source bridge='qbrba20d1ab-30'/></div><div> <target dev='tapba20d1ab-30'/></div><div> <model type='virtio'/></div><div class="quoted-text"><div> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/></div><div> </interface></div></div></div><div><br></div><div>I've came across the blueprint for adding the image property <span style="color:rgb(62,67,73);font-family:Arial,sans-serif;font-size:14.4px">hw_vif_multiqueue_<wbr>enabled. Do you know if this feature is available in Mitaka?</span></div></div><div class="gmail_extra"></div></blockquote></div></div></div><div dir="auto">It was merged 2 years ago so should have been there since Liberty.</div><div dir="auto"><div class="gmail_extra"><div class="gmail_quote"><blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="gmail_extra"><br clear="all"><div><div class="m_3388523053817573471gmail_signature" data-smartmail="gmail_signature">
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<p style="background-color:rgb(255,255,255);margin-top:8px;margin-bottom:8px;color:rgb(51,51,51);line-height:1.6"><span style="font-size:14pt">John Petrini</span></p>
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<br><div class="gmail_quote">On Fri, Jul 28, 2017 at 3:59 AM, Saverio Proto <span dir="ltr"><<a href="mailto:zioproto@gmail.com" target="_blank">zioproto@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hello John,<br>
<br>
a common problem is packets being dropped when they pass from the<br>
hypervisor to the instance. There is bottleneck there.<br>
<br>
check the 'virsh dumpxml' of one of the instances that is dropping<br>
packets. Check for the interface section, should look like:<br>
<br>
<interface type='bridge'><br>
<mac address='xx:xx:xx:xx:xx:xx'/><br>
<source bridge='qbr5b3fc033-e2'/><br>
<target dev='tap5b3fc033-e2'/><br>
<model type='virtio'/><br>
<driver name='vhost' queues='4'/><br>
<alias name='net0'/><br>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03'<br>
function='0x0'/><br>
</interface><br>
<br>
how many queues you have ??? Usually if you have only 1 or if the<br>
parameter is missing completely is not good.<br>
<br>
in Mitaka nova should use 1 queue for every instance CPU core you<br>
have. It is worth to check if this is set correctly in your setup.<br>
<br>
Cheers,<br>
<br>
Saverio<br>
<div class="m_3388523053817573471HOEnZb"><div class="m_3388523053817573471h5"><br>
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2017-07-27 17:49 GMT+02:00 John Petrini <<a href="mailto:jpetrini@coredial.com" target="_blank">jpetrini@coredial.com</a>>:<br>
> Hi List,<br>
><br>
> We are running Mitaka with VLAN provider networking. We've recently<br>
> encountered a problem where the UDP receive queue on instances is filling up<br>
> and we begin dropping packets. Moving instances out of OpenStack onto bare<br>
> metal resolves the issue completely.<br>
><br>
> These instances are running asterisk which should be pulling these packets<br>
> off the queue but it appears to be falling behind no matter the resources we<br>
> give it.<br>
><br>
> We can't seem to pin down a reason why we would see this behavior in KVM but<br>
> not on metal. I'm hoping someone on the list might have some insight or<br>
> ideas.<br>
><br>
> Thank You,<br>
><br>
> John<br>
><br>
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