On Sun, Mar 18, 2012 at 09:47:55PM +0530, shashank rachamalla wrote:
> >> I guess things are working fine with perf. But why not with oprofile ?
> >>
> > Looks like it. I never tried oprofile. Will try to reproduce your
> > problem and see what oprofile is doing.
>
> I am using ubuntu 10.04 with 2.6.32-21-generic kernel as guest and
> oprofile 0.9.6.
> Also, I have tried to capture kvm-events ( perf patch ) in host while
> running oprofile and perf in guest.
> Please see the attachment. I have run the tests in three cases for the
> around 5 secs.
>
> There are more number of MSR reads and writes in case of perf which I
> think is normal. However, there are very few MSR reads and writes with
> oprofile. Also, the number of NMI exceptions are too high in case of
> oprofile.
>
Which host kernel are you using? Try latest kvm.git and check if you see
something unusual in dmesg.
--
Gleb.
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