Re: [Xen-devel] CAP and performance problem

[Massimo Canonico <mex@xxxxxxxxxxxx>]

On 06/06/2013 03:03 PM, Dario Faggioli wrote:
> On gio, 2013-06-06 at 14:52 +0200, Massimo Canonico wrote:
> > On 06/06/2013 12:44 PM, George Dunlap wrote:
> > > > You can test this by setting the xen hypervisor boot option
> > > >
> > > > cpufreq=none
> > > >
> > > > and run your test again (with and without cap).
> > > Ah, genius Juergen!  That would make total sense.
> > >
> > >   -George
> > Unfortunately, this did not change much. I set "cpufreq=none" in the
> > boot line and restart my experiment.
> > With no cap I got 298.029
> > with cap=50% I got 910.272
> > (average values of 3 experiments for each cap setting)
> Mmm... 298.029 is a lot faster than what you reported before, though...
> Are this the exact same experiments?
>
> In fact, in the first e-mail of this thread you said that "with CAP =
> 100% I got my results in about 600 seconds". So, have you changed
> something or the cpufred=none did at least have some effect?
>
> Dario
Hi Dario,
I only changed the workload from "40 times matrix multiplications" to 
"20 times matrix multiplications" to get the results faster, since I do 
not think that this makes any difference in perfomance comparisin 
between cap/no cap.
M






_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel