device: 0.847
graphic: 0.698
network: 0.577
instruction: 0.561
semantic: 0.323
assembly: 0.320
vnc: 0.227
mistranslation: 0.189
boot: 0.155
other: 0.154
KVM: 0.089
socket: 0.024

virtio only support packed ring size power of 2