virtual: 0.951
architecture: 0.871
device: 0.847
performance: 0.782
graphic: 0.698
network: 0.577
risc-v: 0.461
peripherals: 0.440
ppc: 0.422
hypervisor: 0.419
permissions: 0.416
PID: 0.404
semantic: 0.323
TCG: 0.323
assembly: 0.320
i386: 0.283
vnc: 0.227
arm: 0.211
VMM: 0.191
register: 0.190
mistranslation: 0.189
debug: 0.173
boot: 0.155
user-level: 0.155
files: 0.125
x86: 0.103
KVM: 0.089
kernel: 0.067
socket: 0.024

virtio only support packed ring size power of 2