10G NIC performance: VFIO vs virtio
From KVM
We did some experiment trying to measure network performance overhead in virtualization environment, comparing between VFIO passthrough and virtio approaches.
Test Topology
2 Intel Grantley-EP platforms (Xeon E5-2697 v3) connected by 10G link; memory 96 G.
NIC: Intel 82599ES
Test Tool: iperf
OS: RHEL 7.1