`<html>
<head>
<style><!--
.hmmessage P
{
margin:0px;
padding:0px
}
body.hmmessage
{
font-size: 12pt;
font-family:Calibri
}
--></style></head>
<body class='hmmessage'><div dir='ltr'><div class="paddingtop paddingbottom"><style>
.ExternalClass .ecxhmmessage P {
padding:0px;
}
.ExternalClass body.ecxhmmessage {
font-size:12pt;
font-family:Calibri;
}
</style>Hello,</div><div class="paddingtop paddingbottom">We experience slow network performance after upgrading for virtual machines.<br>Copying from a system (physical machine) to the VM the copy speed drop from 85MB/s on release 10 to between 9 and 14MB/s. Both systems I upgraded experience the exact same symptom and use the igb driver.</div><div class="paddingtop paddingbottom">Both have Supermicro mainboards; X9DRD-7LN4F-JBOD and X10SLL-F. Copy tests are done between windows 8.1 and a Windows 2012R2 VM.<br>Changing to virtio for nic as suggested in a previous email had no impact other than causing kvm to crash after copying ~400MB. </div><div class="paddingtop paddingbottom"> <br>Anyone else seeing this behavior?</div><div class="paddingtop paddingbottom"> </div><div class="paddingtop paddingbottom">I do see the X10SLL board has an e1000g nic also</div><div class="paddingtop paddingbottom">LINK MEDIA STATE SPEED DUPLEX DEVICE<br>e1000g0 Ethernet unknown 0 half e1000g0<br>igb0 Ethernet up 1000 full igb0<br></div><div class="paddingtop paddingbottom">I will switch over to that and test again. <br> <br>Thanks,</div> </div></body>
</html>`