Re: [Xen-users] cpu management

[Andrej Radonic <andrej.radonic@xxxxxxxx>]

Paul Peeler wrote:
> On Fri, 2006-04-07 at 15:26 +0200, Andrej Radonic wrote:
>   
> > Paul Peeler wrote:
> >     
> > > Is there a way to define how much of the cpu a particular domU is
> > > allowed to use? I know you can specify which cpu/cpus it uses, but it
> > > would be nice to be able to say "25% of CPU0" and allow it to use more
> > > if it is available.
> > >   
> > >       
> > Hi Paul,
> >
> > yes (of course), something like that.
> >
> > There is the "memory" parameter in the domU's config file. This is the 
> > default  as well as max RAM assigned to a domU at boot time. At runtime 
> > you can use "xm mem-set <domain> <megabytes>" to dynmically adjust 
> > allocated RAM, but only up to the initial value.
> > All this is accomplished via the "balloon" driver.
> >
> > Cheers,
> > Andrej
> >     
>
> How does that control the cpu utilization?
>   
Hi  Paul,

sorry - completely misread your posting. I thought you were referring to 
memory, not CPU.
AFAIK to this end there is the "bvt" scheduler. You will find info on 
this in the xm man page. Never used it so I am sorry I can't tell you 
anything more. (but I'd be happy to hear from you about it if you 
succeed because I will get to this topic in a few days).
Bye,

Andrej


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