<div dir="ltr"><span style="background-color:rgb(255,255,255)">Hi,</span><div><span style="background-color:rgb(255,255,255)"><br></span><div><p class="gmail-p1" style="margin:0px;font:14px Menlo;color:rgb(0,0,0)"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures;background-color:rgb(255,255,255)">On Azure cloud, DPDK application with Netvsc PMD works well on SRIOV VF device(Accelerated Networking enabled) VM.</span></p><p class="gmail-p1" style="margin:0px;font:14px Menlo;color:rgb(0,0,0)"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures;background-color:rgb(255,255,255)">However, as part of hot-plug testing, when we removed the SRIOV VF device(by disabling the Accelerated networking option), all the traffic works well on synthetic device(netvsc).</span></p><p class="gmail-p1" style="margin:0px;font:14px Menlo;color:rgb(0,0,0)"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures;background-color:rgb(255,255,255)">But, when we added back the SRIOV VF device(by enabling the Accelerated Networking option), still the traffic flows on Synthetic device only and not on SRIOV VF.</span></p><p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;font-size-adjust:none;font-kerning:auto;font-feature-settings:normal;font-stretch:normal;line-height:normal"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures;background-color:rgb(255,255,255)">








</span></p><p class="gmail-p2" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;font-size-adjust:none;font-kerning:auto;font-feature-settings:normal;font-stretch:normal;font-size:14px;line-height:normal;font-family:Menlo;color:rgb(0,0,0);min-height:16px"><span style="background-color:rgb(255,255,255)"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures"></span><br></span></p><p class="gmail-p1" style="margin:0px;font:14px Menlo;color:rgb(0,0,0)"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures;background-color:rgb(255,255,255)">We could see in the DPDK logs that the SRIOV VF got added and detected well by Netvsc PMD. But, Rx/Tx traffic does not flow on VF devices and thus performance is low.</span></p><p class="gmail-p2" style="margin:0px;font:14px Menlo;color:rgb(0,0,0);min-height:16px"><span style="font-variant-ligatures:no-common-ligatures">Currently, we need to reboot the VM to get the traffic onto the SRIOV VF device.</span></p><p class="gmail-p2" style="margin:0px;font:14px Menlo;color:rgb(0,0,0);min-height:16px"><span style="background-color:rgb(255,255,255)"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures"></span><br></span></p><p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;font-size-adjust:none;font-kerning:auto;font-feature-settings:normal;font-stretch:normal;line-height:normal"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures;background-color:rgb(255,255,255)">









</span></p><p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;font-size-adjust:none;font-kerning:auto;font-feature-settings:normal;font-stretch:normal;font-size:14px;line-height:normal;font-family:Menlo;color:rgb(0,0,0)"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures;background-color:rgb(255,255,255)">Has anyone faced a similar issue?</span></p><p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;font-size-adjust:none;font-kerning:auto;font-feature-settings:normal;font-stretch:normal;font-size:14px;line-height:normal;font-family:Menlo;color:rgb(0,0,0)"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures;background-color:rgb(255,255,255)">Is this the expected behaviour or any known limitation on Netvsc PMD ?</span></p><p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;font-size-adjust:none;font-kerning:auto;font-feature-settings:normal;font-stretch:normal;font-size:14px;line-height:normal;font-family:Menlo;color:rgb(0,0,0)"><br></p><p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;font-size-adjust:none;font-kerning:auto;font-feature-settings:normal;font-stretch:normal;font-size:14px;line-height:normal;font-family:Menlo;color:rgb(0,0,0)"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures;background-color:rgb(255,255,255)"><br></span></p><p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;font-size-adjust:none;font-kerning:auto;font-feature-settings:normal;font-stretch:normal;font-size:14px;line-height:normal;font-family:Menlo;color:rgb(0,0,0)"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures;background-color:rgb(255,255,255)">Thanks,</span></p><p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;font-size-adjust:none;font-kerning:auto;font-feature-settings:normal;font-stretch:normal;font-size:14px;line-height:normal;font-family:Menlo;color:rgb(0,0,0)"><span class="gmail-s1" style="font-variant-ligatures:no-common-ligatures;background-color:rgb(255,255,255)">Madhuker.</span></p></div></div></div>