device: 0.712
performance: 0.618
semantic: 0.586
debug: 0.447
graphic: 0.387
other: 0.226
network: 0.177
boot: 0.050
permissions: 0.049
KVM: 0.027
vnc: 0.022
PID: 0.019
socket: 0.006
files: 0.006

"qemu-system-arm -machine virt -cpu cortex-a9" error message includes a lot of "(null)"s