device: 0.857
arm: 0.539
debug: 0.499
performance: 0.436
graphic: 0.363
network: 0.320
boot: 0.266
i386: 0.260
permissions: 0.246
x86: 0.196
VMM: 0.191
KVM: 0.135
architecture: 0.130
TCG: 0.125
files: 0.113
risc-v: 0.112
semantic: 0.107
ppc: 0.092
PID: 0.066
virtual: 0.064
register: 0.052
mistranslation: 0.040
vnc: 0.035
hypervisor: 0.028
user-level: 0.027
assembly: 0.024
peripherals: 0.020
socket: 0.010
kernel: 0.002

A bug of ptimer that the freq can't set more than 1000M