performance: 0.711
device: 0.672
network: 0.475
PID: 0.430
semantic: 0.427
boot: 0.350
graphic: 0.305
permissions: 0.287
vnc: 0.262
debug: 0.237
other: 0.196
files: 0.092
socket: 0.088
KVM: 0.078

allow qemu_thread_create to return with error