Re: [Xen-devel] Latest unstable detects cpu speed incorrectly

[Valtteri Kiviniemi <valtteri.kiviniemi@xxxxxxxxxxxx>]

Hi,

I have to wait for that to occur again. There were no error messages, 
suddenly domU's with emulated TSC started to use a lot of CPU until they 
were so slow that they had to be destroyed. domU's with native tsc are 
working fine.
Is there any way to track down the problem?

- Valtteri Kiviniemi

Keir Fraser kirjoitti:
> Haven't heard any other reports of that. Can you provide more details?
>
>  -- Keir
>
> On 27/10/2009 15:51, "Valtteri Kiviniemi" <valtteri.kiviniemi@xxxxxxxxxxxx>
> wrote:
>
> > Hi,
> >
> > Seems like that emulation is not quite working as it should be. domU's
> > are using all the available cpu and then they crash. I did a fallback
> > back to the old behaviour and the virtuals running with tsc_native=1 are
> > working fine.
> >
> > - Valtteri Kiviniemi
> >
> > Valtteri Kiviniemi kirjoitti:
> > > Hi,
> > >
> > > Ok, good to know. Is it always at 1GHz or can it be adjusted? Is there
> > > some other new features different from 3.4.1 that I should know?
> > >
> > >
> > > - Valtteri Kiviniemi
> > >
> > > Keir Fraser kirjoitti:
> > > > On 27/10/2009 15:22, "Valtteri Kiviniemi"
> > > > <valtteri.kiviniemi@xxxxxxxxxxxx>
> > > > wrote:
> > > >
> > > > > We are testing the latest xen-unstable and found an interesting bug.
> > > > > dom0 detects cpu speed correctly but when booting domU it detects it
> > > > > incorrectly:
> > > > >
> > > > > "Detected 1000.000 MHz processor."
> > > > TSC is emulated at that speed. If you want old behaviour then add
> > > > tsc_native=1
> > > > to your domain config file.
> > > >
> > > >  -- Keir
> > > >
> > > >
> > > >
> > > > _______________________________________________
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