socket: 0.913
network: 0.728
performance: 0.688
device: 0.618
debug: 0.384
boot: 0.373
graphic: 0.269
PID: 0.259
semantic: 0.248
vnc: 0.196
KVM: 0.113
other: 0.108
permissions: 0.105
files: 0.089

linux-user getsockopt(fd, SOL_SOCKET, SO_ERROR) returns host errno to target