linux-kernel - Re: [PATCH V2 0/6] perf intel-pt: Support itrace option flag d+e to log on error

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Date:   Tue, 6 Sep 2022 10:24:03 -0700
From:   Namhyung Kim <namhyung@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Adrian Hunter <adrian.hunter@...el.com>,
        Jiri Olsa <jolsa@...hat.com>, Ian Rogers <irogers@...gle.com>,
        Andi Kleen <ak@...ux.intel.com>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V2 0/6] perf intel-pt: Support itrace option flag d+e to
 log on error

HI Arnaldo,

On Tue, Sep 6, 2022 at 6:05 AM Arnaldo Carvalho de Melo <acme@...nel.org> wrote:
>
> Em Mon, Sep 05, 2022 at 10:34:18AM +0300, Adrian Hunter escreveu:
> > Hi
> >
> > Here are a few patches to add the ability to output the decoding debug log
> > only when there are decoding errors.
> >
> > This is motivated by the fact that a full log can be very large, so just
> > getting interesting bits is useful for analyzing errors.
> >
> > If necessary, the size of output on error is configurable via perf config,
> > and perf_config_scan() was added in the 1st patch to make that simpler.
> >
> > The 2nd patch adds the new option flag to auxtrace.
> >
> > There are a couple of very minor and essentially unrelated changes in
> > patches 3 and 4.
> >
> > The main Intel PT change is in patch 5 and there is a small example in the
> > commit message.
> >
> >
> > Changes in V2:
> >
> >       perf intel-pt: Support itrace option flag d+e to log on error
> >       Ensure log_buf is defined before use
> >
> >       perf intel-pt: Remove first line of log dumped on error
> >       Remove first line only if the buffer has wrapped
>
> Applied locally, Namhyung: I think your review comment was addressed,
> right? If so can I add your Reviewed-by to all the patches in this
> series?

Sure,

Reviewed-by: Namhyung Kim <namhyung@...nel.org>

Thanks,
Namhyung

>
> - Arnaldo
>
> >
> > Adrian Hunter (6):
> >       perf tools: Add perf_config_scan()
> >       perf auxtrace: Add itrace option flag d+e to log on error
> >       perf intel-pt: Improve man page layout slightly
> >       perf intel-pt: Improve object code read error message
> >       perf intel-pt: Support itrace option flag d+e to log on error
> >       perf intel-pt: Remove first line of log dumped on error
> >
> >  tools/perf/Documentation/itrace.txt             |   1 +
> >  tools/perf/Documentation/perf-config.txt        |   7 ++
> >  tools/perf/Documentation/perf-intel-pt.txt      |  13 ++-
> >  tools/perf/util/auxtrace.c                      |  13 +++
> >  tools/perf/util/auxtrace.h                      |   3 +
> >  tools/perf/util/config.c                        |  31 +++++++
> >  tools/perf/util/config.h                        |   1 +
> >  tools/perf/util/intel-pt-decoder/intel-pt-log.c | 117 +++++++++++++++++++++++-
> >  tools/perf/util/intel-pt-decoder/intel-pt-log.h |   3 +-
> >  tools/perf/util/intel-pt.c                      |  23 ++++-
> >  10 files changed, 206 insertions(+), 6 deletions(-)
> >
> >
> > Regards
> > Adrian
>
> --
>
> - Arnaldo