Re: [Xen-devel] Problems about CPU Affinity

[Saori Fukuta <fukuta.saori@xxxxxxxxxxxxxx>]

Hi,

Thank you for your comments !

On Fri, 18 May 2007 10:07:46 -0500 Ryan Harper wrote:
> * Ian Pratt <Ian.Pratt@xxxxxxxxxxxx> [2007-05-18 05:36]:
> > > > I thought you could by specifying a list of physical CPUs?
> > > > Perhaps this
> > > > got broken by the xapi changes?
> > > 
> > > No, the problem that the original post talks about, is that you can't
> > > set affinity of individual VCPU's to individual PCPU's, e.g:
> > > vcpus=2
> > > cpus=2
> > 
> > AFAIK, you used to be able to specify a list:
> >  vcpus=2
> >  cpus = ["2,3,4","5,6,7"]

Yes, I was talking about the things described above.

> > Maybe this patch never went in. AFAIR it was from Ryan. 
>
> I don't think we ever took the multi cpumask per vcpu patch.  At the
> time, only the part where we apply the same cpumask defined from cpus=""
> value to each vcpu when in allowing the credit scheduler to balance within
> the affinity mask.
> 
> Couple of threads of discussion here:
> 
> http://lists.xensource.com/archives/html/xen-devel/2006-08/msg00965.html
> 
> The only changes that is see committed were:
> 
> changeset:   11111:438ed1c4b391
> user:        kfraser@xxxxxxxxxxxxxxxxxxxxx
> date:        Tue Aug 15 10:56:59 2006 +0100
> summary:     [XEND] Apply the domain cpumask fully to every vcpu in the 
> domain.

Therefore, I can not specify such a list now.

If everything is OK, could you apply these patches ?

Thanks,
Saori Fukuta


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