On Tue, Mar 04, 2008 at 03:11:27PM -0300, Glauber Costa wrote:
> Joerg Roedel wrote:
> >On Tue, Mar 04, 2008 at 01:21:53PM -0300, Glauber Costa wrote:
> >>Hi guys,
> >>
> >>Here's a first series of patch aiming at vcpu pinning support in qemu.
> >>Ideally, as vcpu as just normal threads, the usual userspace tools can be
> >>used
> >>to set cpu affinities mask.
> >>
> >>However, It makes it very difficult to _start_ a vm with vcpus pinned, since
> >>we don't know the thread ids from qemu in advance, nor do we know when are
> >>the
> >>vcpus created.
> >>
> >>The patches introduce a -cpu-map option, that, if specified, starts the
> >>virtual cpus
> >>with the specified affinities.
> >>
> >>Comments? Welcome. Random rants? Not welcome, but... how can I stop you? So
> >>go ahead!
> >Cool, this goes into the same direction as I planned for KVM-NUMA
> >support. Do you plan to extend vcpu pinning into that direction?
> I don't have any immediate plans, but it is surely interesting. If the
> patches (or something inspired in them) make it, there's something we can
> draw support for.
There are patches for HVM-NUMA support on Xen developed by André
Przywara. I think they are easy to port to KVM. Maybe it is the better
aproach than implementing simple vcpu pinning.
Joerg
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