<div dir="ltr"><p style="margin:0cm 0cm 7.5pt;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10.5pt;font-family:"Segoe UI",sans-serif;color:rgb(51,51,51)">Hi,</span></p>

<p style="margin:0cm 0cm 7.5pt;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10.5pt;font-family:"Segoe UI",sans-serif;color:rgb(51,51,51)">I am running a <strong>D8sV3</strong> type
instance on azure with <strong>RHEL7.9</strong> &
accelerated networking enabled on one of the interface.</span></p>

<p style="margin:0cm 0cm 7.5pt;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial;box-sizing:inherit;outline-color:inherit;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10.5pt;font-family:"Segoe UI",sans-serif;color:rgb(51,51,51)">On this am running my DPDK app which is binding to the VF
exposed & its corresponding netvsc interface via <strong>vdev_netvsc driver</strong> as
suggested in <a href="https://learn.microsoft.com/answers/storage/attachments/267669-dpdk-cpus-perf.png" style="color:rgb(5,99,193)">https://learn.microsoft.com/en-us/azure/virtual-network/setup-dpdk</a></span></p>

<p style="margin:0cm 0cm 7.5pt;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial;box-sizing:inherit;outline-color:inherit;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10.5pt;font-family:"Segoe UI",sans-serif;color:rgb(51,51,51)">DPDK doc : <a href="https://learn.microsoft.com/answers/storage/attachments/267669-dpdk-cpus-perf.png" style="color:rgb(5,99,193)">vdev_netvsc.html</a></span></p>

<p style="margin:0cm 0cm 7.5pt;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial;box-sizing:inherit;outline-color:inherit;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10.5pt;font-family:"Segoe UI",sans-serif;color:rgb(51,51,51)">The expected behaviour is that all traffic should flow through
the physical interface (VF) and not from synthetic device (eth2 in my case).<br>
But I can see all traffic coming to eth2 & dtap0 devices. This is causing
my dpdk cpus to handle RX interrupts for these packets causing major
performance issues & jitters. I am not understanding why all these packets
are being mirrored to slow path.</span></p>

<p style="margin:0cm 0cm 7.5pt;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial;box-sizing:inherit;outline-color:inherit;font-size:11pt;font-family:Calibri,sans-serif"><strong><span style="font-size:10.5pt;font-family:"Segoe UI",sans-serif;color:rgb(51,51,51)">Note: All my traffic is UDP.</span></strong><span style="font-size:10.5pt;font-family:"Segoe UI",sans-serif;color:rgb(51,51,51)"></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 12pt;font-size:11pt;font-family:Calibri,sans-serif"> </p><img src="cid:ii_lc04zfx20" alt="dpdk_cpus_perf.png" width="472" height="253"><div><br>

<img src="cid:ii_lc04zfxt1" alt="azure_pkts_on_eth2.png" width="472" height="255"><div><br><div><p style="margin:0cm 0cm 7.5pt;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-family:Arial,Helvetica,sans-serif;font-size:small"></span><span style="font-size:10.5pt;font-family:"Segoe UI",sans-serif;color:rgb(51,51,51)">I would like to know if there is any setting I am missing here.
This is causing a lot of problems for me to qualify on Azure cloud with
expected throughput.</span></p><p style="margin:0cm 0cm 12pt;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial;box-sizing:inherit;outline-color:inherit;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10.5pt;font-family:"Segoe UI",sans-serif;color:rgb(51,51,51)">
<br>
Thanks.</span></p>

<p class="MsoNormal" style="margin:0cm;font-size:11pt;font-family:Calibri,sans-serif">Best regards,</p>

<p class="MsoNormal" style="margin:0cm;font-size:11pt;font-family:Calibri,sans-serif">Piyush Gupta</p>

<p class="MsoNormal" style="margin:0cm;font-size:11pt;font-family:Calibri,sans-serif"> </p></div></div></div></div>