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Message-ID: <20170719143514.GE20962@kernel.org>
Date: Wed, 19 Jul 2017 11:35:14 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: "Liang, Kan" <kan.liang@...el.com>
Cc: Jiri Olsa <jolsa@...hat.com>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"mingo@...hat.com" <mingo@...hat.com>,
"peterz@...radead.org" <peterz@...radead.org>,
"Hunter, Adrian" <adrian.hunter@...el.com>,
"alexander.shishkin@...ux.intel.com"
<alexander.shishkin@...ux.intel.com>,
"ak@...ux.intel.com" <ak@...ux.intel.com>
Subject: Re: [PATCH V2 2/2] perf tools: always set no branch for dummy event
in PT
Em Wed, Jul 19, 2017 at 02:28:26PM +0000, Liang, Kan escreveu:
>
>
> > 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@...el.com wrote:
> > > > From: Kan Liang <kan.liang@...el.com>
> > > >
> > > > 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@...el.com>
> > >
> > > for the patchset:
> > >
> > > Acked-by: Jiri Olsa <jolsa@...nel.org>
> >
> > Thanks, applied.
> >
>
> Hi Arnaldo,
>
> The patch series looks miss the latest update.
> Could you please have a look?
Will, check, thanks for verifying.
- Arnaldo
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