linux-kernel - Re: [PATCH v3] perf intel-pt: Synthesize cycle events

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Message-ID: <Yj49LDY3S/ANeN0V@kernel.org>
Date:   Fri, 25 Mar 2022 19:07:40 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Adrian Hunter <adrian.hunter@...el.com>
Cc:     "Steinar H. Gunderson" <sesse@...gle.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] perf intel-pt: Synthesize cycle events

Em Wed, Mar 23, 2022 at 09:58:00AM +0200, Adrian Hunter escreveu:
> On 22/03/2022 23:53, Steinar H. Gunderson wrote:
> > On Tue, Mar 22, 2022 at 06:32:18PM -0300, Arnaldo Carvalho de Melo wrote:
> >> I saw there was some issue, should I proceed and apply this v3 patch or
> >> wait for some v4?
> > 
> > There are two issues in play:
> > 
> >  1. PT event synth doesn't support reading inline information from DWARF
> >     yet, and my patch to add it runs into some problems. This is not
> >     relevant for this patch at all.
> >  2. The results from v3 don't quite match the ones from v1, and neither
> >     of us are entirely sure why. My personal feeling is that the one
> >     from v1 are the wrong ones, but it's up to Adrian to say whether we
> >     want to try to investigate deeply here.
> 
> V3 is good.  Please take that.

Thanks, applied.

- Arnaldo