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 ?