Re: [PATCH 27/33] tools, perf: Add a precise event qualifier

Andi Kleen
2012-10-28T20:06:08Z

On Sun, Oct 28, 2012 at 08:24:49PM +0100, Jiri Olsa wrote:
> On Sun, Oct 28, 2012 at 08:13:13PM +0100, Andi Kleen wrote:
> > On Sat, Oct 27, 2012 at 09:35:44PM +0200, Jiri Olsa wrote:
> > > On Fri, Oct 26, 2012 at 01:30:09PM -0700, Andi Kleen wrote:
> > > > From: Andi Kleen <ak@linux.intel.com>
> > > >
> > > > Add a precise qualifier, like cpu/event=0x3c,precise=1/
> > > hm, I think this works already via 'p' modifier like:
> > > cpu/event=0x3c/p
> >
> > Not for kernel specified events, which is why this was needed.
>
> I haven't checked deeply, but I thought the modifier is always
> applied, what do you mean by 'kernel specified events' ?

Events exported in sysfs.

See the earlier patches in the patchkit.

-Andi

--
ak@linux.intel.com -- Speaking for myself only