Open Stack

Hi,

I am using openstack wallaby on ubuntu 20.04 and kvm. I am working to make
optimized flavor properties that should provide optimal performance. I was
reviewing the document below.

https://docs.openstack.org/nova/wallaby/admin/cpu-topologies.html

I have two socket AMD compute node. The workload running on nodes are mixed
workload.

My question is should I use default nova CPU topology and NUMA node that
nova deploys instance by default OR should I use hw:cpu_sockets='2'
and hw:numa_nodes='2'.

Which one from above provide best instance performance ? or any other
tuning should I do ?

The note in the URL (CPU topology sesion) suggests that I should stay with
default options that nova provides.

Currently it also works with libvirt/QEMU driver but we don’t recommend it
in production use cases. This is because vCPUs are actually running in one
thread on host in qemu TCG (Tiny Code Generator), which is the backend for
libvirt/QEMU driver. Work to enable full multi-threading support for TCG
(a.k.a. MTTCG) is on going in QEMU community. Please see this MTTCG project
<http://wiki.qemu.org/Features/tcg-multithread> page for detail.


Ammad
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstack.org/pipermail/openstack-discuss/attachments/20210625/fdb94593/attachment-0001.html>