* Peter Zijlstra <[email protected]> wrote:
> On Sun, Dec 06, 2015 at 02:11:02PM +0100, Ingo Molnar wrote:
>
> > the symptom is that latest 'perf top' and 'perf record' produces no samples.
> >
> > So I've removed this commit and the related Skylake commit from -tip:
> >
> > 4576ceaa56a8 perf/x86: Use INST_RETIRED.PREC_DIST for cycles:ppp
> > ac1e1d30cf90 perf/x86: Use INST_RETIRED.TOTAL_CYCLES_PS for cycles:pp for
> > Skylake
> >
> > you need to do better testing next time around. Note: if you resubmit the
> > patches,
> > please also pick up the updates commit changelogs from the tip-bot emails,
> > don't
> > use your original changelogs.
>
> OK, so I need:
>
> lkml.kernel.org/r/[email protected]
> lkml.kernel.org/r/[email protected]
>
> On my IVB because that keeps triggering that case with :ppp, other than
> that this seems to work fine on IVB.
>
> I've also tried on SNB (which does not support the new :ppp thing) and
> that too works.
>
> Sadly I do not have older hardware anymore :/
>
>
> Also, perf tools DTRT and will use :ppp by default if available.
So I checked my NHM box with your latest queue and it now works correctly. Do
you
have any idea what the difference is/was?
Thanks,
Ingo
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