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Maxing only Single core on instance with multiple vcpus

asked 2020-05-18 10:13:17 -0500

anonymous user

Anonymous

Hi all,

Just recently deployed Openstack Queens onto an Ubuntu 18.04 LTS Server. Followed the guide doc(s) on the Openstack website.

Note that this is an all-in-one build.

After running htop to see the systems overall usage, I can see that there is really only one core of my 4-Core ( 8 Threads ) processor is completely maxed at 100% while running instance(s) with all other cores remaining underutilized.

I tested this with running instances with 2, and then 4 vCPUs - Which shows a similar result in CPU usage.

I tried increasing the property cpu_allocation_ratio in nova.conf, but nothing changed.

Any ideas on what the issue might be? Could this be an openstack issue or something else that I need to rectify.

Thanks in advance.

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answered 2020-05-19 09:37:52 -0500

MrMr gravatar image

Hi all,

Answering my own question here after some tinkering.

Under the [libvirt] category in nova.conf, I changed virt_type=qemu to virt_type=kvm. This fixed my issue, others can chime in if they feel its not the best for the long run.

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Asked: 2020-05-18 10:11:58 -0500

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Last updated: May 18