Re: [Xen-users] simulate slower virtual hosts?

["Ulrich Windl" <ulrich.windl@xxxxxxxxxxxxxxxxxxxx>]

Hi!

As someone said, there are currently no configuration file options to adjust 
the 
schedulting parameters, it seems like XEN needs a "post-create script" that is 
run 
after xend thinks a virtual machine had been created. Would make administartion 
a 
lot easier.

Ah, yeah, stupid question: scheduling parameters are not migrated, right? (As 
documented) ;-)

Regards,
Ulrich

On 10 Jan 2007 at 12:45, bigfoot29@xxxxxxxxxxxxxxxxxxxxxx wrote:

> Easiest way to do so is using the credit scheduler.
> 
> xm sched-credit -d Domainname -c 30
> 
> gives the domain a max of 30 % of the cpu power the system is able to
> provide.
> Thats working like a charm here and is stored unless the host crashes. I
> have built a start-script for that that start my domains again and set
> their corresponding credit values.
> 
> its as simple as:
> 
> > #!/bin/bash
> > xm create domainname1
> > xm sched-credit -d domainname1 -c 30 -w 128
> > xm create domainname2
> > xm sched-credit -d domainname2 -c 100 -w 256
> > xm...
> > ...
> 
> When the domain already is started, nothing happens. xend is mumbling an
> error message and thats it. :)
> Working great here and is limiting the domainname1 to the value I want it to.
> 
> Hope, that helped...
> 
> Regards, Bigfoot29
> 
> 
> 
> > On Wed, 2007-01-10 at 08:38 +0100, Martin Hierling wrote:
> >> Hi,
> >>
> >> can anybody tell me how i can set the sched values in the domain
> >> config file?
> >>
> >> regards Martin
> >
> > I needed to do something similar when I was stress testing pound
> > ( www.apsis.ch/pound/ ), I found that it was easier to use multiple
> > bridges and stagger the forward delay on them accordingly.
> >
> > I'm not sure if you *can* set the cpu scheduler info in the config file
> > (yet) ?
> >
> > Thanks
> > --Tim
> >
> 
> 
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