other: 0.716
semantic: 0.663
device: 0.316
graphic: 0.214
performance: 0.185
permissions: 0.178
network: 0.162
vnc: 0.118
debug: 0.086
files: 0.053
boot: 0.042
PID: 0.028
KVM: 0.018
socket: 0.013

qemu-bridge-helper undocumented and broken