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On Wed, Apr 29, 2015 at 11:12:54AM -0400, Steve Gordon wrote:
> Adding Dan and Nikola as I doubt they are on this list, guys this is in reference to this devref example which looks a little off:
> 
> http://docs.openstack.org/developer/nova/devref/testing/libvirt-numa.html#testing-instance-boot-with-1-numa-cell-requested

Yes, sorry my bad. That XML example is wrong - it is the XML you'd see
from a hw:numa_nodes=2 config, not hw:numa_nodes=1

> 
> ----- Original Message -----
> > From: "Blair Bethwaite" <blair.bethwaite at gmail.com>
> > To: "Pradeep Kiruvale" <pradeepkiruvale at gmail.com>
> > Cc: openstack-hpc at lists.openstack.org
> > Sent: Wednesday, April 29, 2015 10:33:31 AM
> > Subject: Re: [openstack-hpc] NUMA config
> > 
> > On 29 April 2015 at 18:50, Pradeep Kiruvale <pradeepkiruvale at gmail.com>
> > wrote:
> > > I think it creates 2 Virtual NUMA nodes on one single Physical NUMA node
> > > If you see below cpu 0-1 are in one NUMA node and 2-3 are in the other.
> > > This is what I can understand from the xml.
> > >
> > >  <numa>
> > >    <cell id='0' cpus='0-1' memory='524288'/>
> > >    <cell id='1' cpus='2-3' memory='524288'/>
> > >  </numa>
> > 
> > Yeah, but that doesn't seem to be consistent with this from the same section:
> > "nova flavor-key m1.numa set hw:numa_nodes=1"
> > According to the spec
> > (http://specs.openstack.org/openstack/nova-specs/specs/juno/implemented/virt-driver-numa-placement.html):
> > hw:numa_nodes=NN - numa of NUMA nodes to expose to the guest.
> > Not to mention the numatune config that binds the guest nodes to host nodes.
> > 
> > An aside: Does anyone else find it strange that all these options are
> > designed to be flavor and/or image extra specs rather than providing a
> > mechanism to set them on instance boot (e.g. hints). I think the
> > relationship between flavors or images and such tunables is tenuous at
> > best, why should I need multiple versions of what is otherwise the
> > same image or flavor in order to ask for e.g. CPU pinning or Qemu
> > guest agent, these are per instance tunables.

Regards,
Daniel
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