high kernel space cpu usage
Hello,
We are running openstack Queen installed with kolla-ansible on ubuntu 16.04; it works, however there is something that seems to me quite wrong:
most of the time CPU of the compute host is spending in kernel mode:
%Cpu(s): 0.7 us, 30.2 sy, 0.0 ni, 68.7 id, 0.0 wa, 0.0 hi, 0.4 si, 0.0 st
(extract from top command).
Maybe someone can point direction what could be the cause of it? (maybe it's some common configuration mistake..) Thanks
Did you check whether some process is running in background all the time which causes this behavior of the cpu??
most of the (sys) cpu usage is taken by vhost processes and qemu-system-x86