graphic: 0.560
device: 0.430
semantic: 0.427
other: 0.426
performance: 0.412
boot: 0.217
network: 0.181
files: 0.118
permissions: 0.101
debug: 0.090
vnc: 0.076
PID: 0.066
socket: 0.052
KVM: 0.019

qemu-img measure is incorrect when using discard-no-unref