Re: oprofile in VirtualBox

[Anis E. <vad...@gm...>]

On Thu, Apr 1, 2010 at 13:08, soumyakanti chakraborty
<sou...@gm...> wrote:
> Hello Everyone
> I have Ubuntu 9.10 installed in my Virtual Box running in Windows 7.
> Recently I compiled and installed Oprofile 0.9.6 in my Ubuntu according to
> the steps mentioned in the manual. I started opcontrol with vmlinux and
> stopped it after some time and tried to generate the opreport it always
> gives me a error
> root@lapsys:~# opreport
> error: no sample files found: profile specification too strict ?
> I also did see all possibilities why opreport may or may not generate any
> data from the website manual and tried all possible workarounds but none
> worked. I tried installing Suse 11.2 in Virtual Box and tried opreport, but
> it gave the same error. But at the same time when I installed a standalone
> Suse 11.2 and tried with opreport, all things worked smoothly and fine.
> Is there any problem of Oprofile or rather opreport working inside a Linux
> OS which is sitting over VirtualBox ?? Any kind of help much appreciated.

I think that VirtualBox doesn't fully emulate the cpu architecture
that you are using.
You have maybe to force using timer interrupt
$ modprobe oprofile timer=1


>
> Thanks and Regards,
>
> Soumya Kanti Chakraborty
>

Regards,

>
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