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Re: [Libvir] Extending libvirt to probe NUMA topology



On Thu, Jun 14, 2007 at 02:08:12PM +0100, Richard W.M. Jones wrote:
> Daniel P. Berrange wrote:
> > - Linux/Solaris Xen - hypercalls
> > - Linux non-Xen - libnuma  
> > - Solaris non-Xen -  liblgrp
> >
> >The Xen & Linux modelling seems reasonably similar IIRC, but Solaris is
> >a slightly different representational approach. 
> 
> The Solaris approach seems to be fully hierarchical as far as I can work 
> out.

  yup that's what I infer from lgrp_root, lgrp_children and lgrp_parents
well except in a tree would would only have one parent ever that I'm not
sur I really understand
   http://docs.sun.com/app/docs/doc/816-5172/6mbb7bu79?a=view

> That seems to argue for extending the capabilities XML to describe 
> nodes, in as much as the XML can start off as a flat list of NUMA nodes 
> (for IBM) but later be made hierarchical if necessary.

  Agreed, it may be a bit painful in a sense to have to parse XML provided
back from libvirt, but 1/ you should that once per Node 2/ it's not the
only place in libvirt 


  Probably need a bit more thinking about this though,

Daniel

-- 
Red Hat Virtualization group http://redhat.com/virtualization/
Daniel Veillard      | virtualization library  http://libvirt.org/
veillard redhat com  | libxml GNOME XML XSLT toolkit  http://xmlsoft.org/
http://veillard.com/ | Rpmfind RPM search engine  http://rpmfind.net/


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