Re: [libvirt-users] virtio nic dosent use 10gbe speed.
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On 20/02/15 11:38, Kalil de A. Carvalho wrote:
Hello all.
We are moving from Xenserver 6.5 environment to KVM because we
can't use 10gbe speed in our VM's so we decided to test KVM.
To inicial test I've create script, using qemu commands, to build
two VM's and test the nic speed.
Each VM has one nic, using virtio, into it own bridge. In this
bridge we associate one 10gbe physical nic.
They can communicate each other.
When we try do a copy, through SCP, the speed is 300mbps. And if
we open another copy this speed been the half.
Assuming you mean 300MB/s then I suspect you are CPU bound as that's a
lot of crypto operations for scp.
Install iperf http://pkgs.repoforge.org/iperf/
Run iperf -s on one vm and iperf -c <ip of other vm> on the second one
I have benchmarked KVM with openvswitch at over 15Gbit/s on fairly
standard hardware (Second gen i5 desktop)
- --
Tim Fletcher <tim(a)night-shade.org.uk>
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