Hi Thorvald,
Did you run this test VM to VM or within the hypervisor, I assume VM to VM.
Is this only one flow (one VM) or more (several VMs on the same host)?
What is the CPU that you are using? number of cores? memory?
Do you use PCIe Gen3? (I assume you do)
Do you use MTU=1500?
If possible, try to run 2 or 4 VMs and see how it goes, it should be better.
The performance looks ok, but you could reach to better ones (close to line rate)
See this post:http://community.mellanox.com/docs/DOC-1456
I added a performance slide, and a link to Case Study with Plumgrid
http://www.plumgrid.com/wp-content/uploads/documents/PLUMgrid_Mellanox_WP.pdf
Thanks,
Ophir.