Re: [Xen-users] Xenoprof (0.9.5) in PVOPS

["Chulmin Kim" <cmkim@xxxxxxxxxxxxxxxx>]

> Subject: Re: [Xen-users] Xenoprof (0.9.5) in PVOPS
> 
> CCing Konrad who I think has a better handle on the current state of these
> patches.
> 
> On Wed, 2012-05-09 at 07:03 +0100, Chulmin Kim wrote:
> > > Subject: Re: [Xen-users] Xenoprof (0.9.5) in PVOPS
> > >
> > > On Mon, 2012-05-07 at 16:51 +0100, Chulmin Kim wrote:
> > > > Iâm trying to use xenoprof in my Xeon machine with PVOPS (3.1.0
> > > > kernel) & xen 4.1.1.
> > >
> > > > In the past, I had failed to use the xenoprof in this environment.
> > > > (1 year ago)
> > >
> > > > While baremetal booting shows the counter object in
> > > > /dev/oprofile/0 (or 1,2,3) , booting with xen fails to create those 
> > > > objects.
> > >
> > > > Of course, opcontrol command doesnât work. It only prints out that
> > > > error : counter 0 unavailableâ
> > >
> > > > Iâve searched the web, but I couldnât get the enough info to
> > > > resolve it.
> > >
> > > > Is there anyone who knows about this issue?
> > >
> > > AIUI you need to patch a pvops kernel with a xenoprofile patch. You
> > > could ask on the dev list where to find this.
> >
> > Do you know the reason why the patch is not included in the current xen
> version?
> > As far as I know, the patch was developed 2 years ago.
> 
> AFAIK the patch was developed against the classic kernel patches and has
> simply been forward ported onto the PV ops kernel. No one has taken the time
> to go through the code, clean it up, ensure it uses all the right interfaces 
> and
> has clean abstractions, split it up into an upstreamable patchset etc. Is that
> something you might be interested in doing?

I asked it just to check whether the patch has some kind of problems affecting 
the profiling results of xenoprof.

I'm trying the patch on my kernel. I'll report it later. 

Thanks!

 




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