On Thu, Nov 24, 2016 at 9:24 AM, qinglong.dong@horebdata.cn <qinglong.dong@horebdata.cn> wrote:

Hi, all:

I have an ovirt 4.0.5 environment. There is a 10g nic in the host. I have created a vm which uses the 10g nic. The type of the nic is virtio. Then I got a 1g virtual nic in the vm. Now I want a 10g virtual nic in the vm. Is it possible? Anyone can help? Thanks!

Did you make any performance test to evaluate real performance?

What is the qemu-kvm command line generated by your oVirt?

I see in my 4.0.5 environment with 1Gb/snic/vnic, it is something like this:

-netdev tap,fd=24,id=hostnet0,vhost=on,vhostfd=28 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=00:1a:4a:16:01:58,bus=pci.0,addr=0x3

According to this link below, this syntax should give you 10Gb/s performance.... I don't have a 10Gb/s to verify though at my side... ;-)

http://www.linux-kvm.org/page/10G_NIC_performance:_VFIO_vs_virtio

Gianluca