[libvirt-users] Guest cpuacct counters and others location

[Jean-Pierre Ribeauville]

Hi,

My piece of code ( C langage) uses cgroups to retrieve counters related to cpu and memory usage related to KVM guests  hosted by the host where this code runs.

I noticed that depending on the O.S. running on  the host , these counters are not found  at the same location :

CentOS 7 :

ls /sys/fs/cgroup/cpuacct/machine.slice/machine-qemu\\x2drhel6.0.scope/vcpu0
cgroup.clone_children  cgroup.procs  cpuacct.usage         cpu.cfs_period_us  cpu.rt_period_us   cpu.shares  notify_on_release
cgroup.event_control   cpuacct.stat  cpuacct.usage_percpu  cpu.cfs_quota_us   cpu.rt_runtime_us  cpu.stat    tasks
]#

RHEL6 :

ls /cgroup/cpuacct/libvirt/qemu/VM_Orion-1/vcpu0
cgroup.event_control  cgroup.procs  cpuacct.stat  cpuacct.usage  cpuacct.usage_percpu  notify_on_release  tasks



1)      May I assume that their meanings is identical ?

2)      Is this difference due to the O.S. or to libvirt ?

3)      I presume I've to check this point on Ubuntu , Debian and Fedora .

Thanks

J.P. Ribeauville


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