high kernel space cpu usage

asked 2019-02-17 04:57:00 -0500

Tg gravatar image

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

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Comments

Did you check whether some process is running in background all the time which causes this behavior of the cpu??

vathanlal gravatar imagevathanlal ( 2019-02-21 05:06:02 -0500 )edit

most of the (sys) cpu usage is taken by vhost processes and qemu-system-x86

Tg gravatar imageTg ( 2019-02-21 05:36:33 -0500 )edit