Re: [Libvir] CPU pinning of domains at creation time
On Fri, Oct 12, 2007 at 05:02:11PM +0900, Saori Fukuta wrote:
On Thu, 11 Oct 2007 09:00:14 -0400 Daniel Veillard wrote:
> - for the mapping at the XML level I suggest to use a simple extension
> to the <vcpu>n</vcpu> and extend it to
> <vcpu cpuset='2,3'>n</vcpu>
> with a limited syntax which is just the comma separated list of
> allowed CPU numbers (if the code actually detects such a cpuset is
> in effect i.e. in general this won't be added).
How about adding <cpus>2,3</cpus> to the XML simply ?
it's not any simpler. It's more complex because it adds a new element node
in the XML. Moreover I don't expect taht information to be any more structured
so it does not make sense to me to expose it as element content, plus
<cpus> could be used in the future to describe fully structured informations
so I don't think it makes sense to use it for just the cpuset.
And we may set 64 CPUs, it is hard to set all of them by each
number.
(i.e. we have to set cpuset='1,2,3,4,5,6,7,8,9,10,....,64')
So I hope to use - (range) and ^ (negation) to set cpuset as Ryan said.
On input why not. Do you have a complete description of the syntax
you want to allow ?
Daniel
--
Red Hat Virtualization group http://redhat.com/virtualization/
Daniel Veillard | virtualization library http://libvirt.org/
veillard(a)redhat.com | libxml GNOME XML XSLT toolkit http://xmlsoft.org/
http://veillard.com/ | Rpmfind RPM search engine http://rpmfind.net/