RE: [PATCH V2 2/2] perf tools: always set no branch for dummy event in PT

From: Liang, Kan
Date: Wed Jul 19 2017 - 10:28:37 EST




> Em Mon, Jul 03, 2017 at 09:58:32AM +0200, Jiri Olsa escreveu:
> > On Fri, Jun 30, 2017 at 10:16:56AM -0400, kan.liang@xxxxxxxxx wrote:
> > > From: Kan Liang <kan.liang@xxxxxxxxx>
> > >
> > > An earlier kernel patch allowed enabling PT and LBR at the same time
> > > on Goldmont.
> > >
> > > commit ccbebba4c6bf ("perf/x86/intel/pt: Bypass PT vs. LBR
> > > exclusivity if the core supports it")
> > >
> > > However, users still cannot use Intel PT and LBRs simultaneously.
> > > $ sudo perf record -e cycles,intel_pt//u -b -- sleep 1
> > > Error:
> > > PMU Hardware doesn't support sampling/overflow-interrupts.
> > >
> > > PT implicitly adds dummy event in perf tool. dummy event is software
> > > event which doesn't support LBR.
> > >
> > > Always setting no branch for dummy event in Intel PT.
> > >
> > > Signed-off-by: Kan Liang <kan.liang@xxxxxxxxx>
> >
> > for the patchset:
> >
> > Acked-by: Jiri Olsa <jolsa@xxxxxxxxxx>
>
> Thanks, applied.
>

Hi Arnaldo,

The patch series looks miss the latest update.
Could you please have a look?

Thanks,
Kan