[Openstack] Fwd: Defining VM's CPU Socket:Core Topology

John Mark Walker johnmark at johnmark.org
Wed Sep 25 20:42:36 UTC 2013


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---------- Forwarded message ----------
From: Evan Fraser <evan.fraser at trademe.co.nz>
Date: Tue, Sep 24, 2013 at 7:49 PM
Subject: [Openstack] Defining VM's CPU Socket:Core Topology
To: "openstack at lists.openstack.org" <openstack at lists.openstack.org>


 Hello,****

I am trying to figure out how to define a VM’s CPU Socket:Core:Threads
topology.  For licensing reasons we can’t create VM’s that map each core as
a separate socket.****

** **

KVM and libvirt both support the ability to define the socket:core
ratio/topology, but I can’t see how to get openstack to request those
capabilities.****

** **

I've tried the libvirt_cpu_mode and libvirt_cpu_model options, but they
only seem to control the cpu's name, and what flags are passed through.****

** **

It seems that if I could only get nova to create the xml file with a
topology section eg: <toplogy sockets=’1’ cores=’4’ threads=’1’/> then it
would work.****

** **

This feature request seems related:
https://bugs.launchpad.net/nova/+bug/1199019****

** **

But I’m not sure if it’s possible to define it within nova as yet anyway.***
*

** **

Cheers, Evan.****

*Evan Fraser***

*Trade Me | Storage Engineer***

*P*

*+64 4 803 2756*****

*M*

*+64 22 087 4032*****

*E   *

*evan.fraser at trademe.co.nz*

** **

** **

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