[libvirt] [RFC][PATCHv1 0/5] libvirt - show per cpu accounting information

When running 'virt-top -1' , "show percpu statistics mode", virt-top shows a fake value. When running 'while true; do echo hello;done' on a 4vcpu guest, == 0 0.0 1 0.0 2 0.0 3 0.0 4 25.0 25.0= 5 25.0 25.0=# 6 25.0 25.0= 7 25.0 25.0= == All cpus just used equally ;) This is because there is no interface to get per-cpu usage of domain. This patch adds an interface virDomainPcpuStats() to get per-cpu statistics, cpuTime in nanoseconds. Here is a test result with a python script using new interface. == [root@bluextal python]# ./virt-cpuacct.py ({'cpuTime': 0L}, {'cpuTime': 0L}, {'cpuTime': 0L}, {'cpuTime': 0L}, {'cpuTime': 4679204346L}, {'cpuTime': 2103820380L}, {'cpuTime': 8904513019L}, {'cpuTime': 7424701195L}) [root@bluextal python]# ./virt-cpuacct.py ({'cpuTime': 0L}, {'cpuTime': 0L}, {'cpuTime': 0L}, {'cpuTime': 0L}, {'cpuTime': 57010689139L}, {'cpuTime': 26152907202L}, {'cpuTime': 53759693931L}, {'cpuTime': 43074348218L}) == Although I added a new interface, I still wonder what interface is better... any comments are welcome. Thanks, -Kame