Re: Questions about OProfile

[Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>]

On Wed, Apr 06, 2011 at 11:31:31AM -0500, W. Michael Petullo wrote:
> >>>> First, what is the status of Xenoprof? The latest patch is against 0.9.5,
> >>>> but OProfile 0.9.6 is about 16 months old. Is Xenoprof actively
> >>>> maintained?
> 
> >>> There is a crufty pv_ops patch that I forward ported to 2.6.32 in this tree:
> >>> 
> >>> https://github.com/avsm/linux-2.6.32-xen-oprofile
> 
> >> So, is it true that I need to 1) use this patch or 2) use a non-PV
> >> Ops Dom0? I thought 2.6.32 was already non-PV Ops.
>  
> > I don't understand the question. The above tree is a pv_ops kernel,
> > with additional patches applied so it can be a full Xen dom0 (including
> > netback, etc).  I'm only sporadically updating it as I need to, so you
> > probably just want the oprofile patch [1] if you want to apply it to
> > some other kernel.
> 
> > https://github.com/avsm/linux-2.6.32-xen-oprofile/commit/4df4780e638d14249b7aa4005511218a9183c324
> 
> Thanks, Anil. I was able to get your patch to work. If anyone is
> interested in what I did, please see:
> 
> 	https://bugzilla.redhat.com/show_bug.cgi?id=693596#c2
> 
> An a related note, would there be any interest in cleaning up this patch
> and moving it to 2.6.38 as a part of Google Summer of Code?

There would be interest in getting it cleaned up for 2.6.38.

I don't think it could be done under GSOC - it looks like it would
just take a week for it to be done.