performance: 0.868
network: 0.815
device: 0.721
debug: 0.593
graphic: 0.323
PID: 0.222
socket: 0.217
semantic: 0.208
vnc: 0.208
boot: 0.151
other: 0.084
permissions: 0.068
KVM: 0.016
files: 0.012

[block jobs]qemu hang when creating snapshot target node(iothread enable)