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

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Message-ID: <YxdFfVbDcwnT7DXm@kernel.org>
Date:   Tue, 6 Sep 2022 10:05:01 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Namhyung Kim <namhyung@...nel.org>,
        Adrian Hunter <adrian.hunter@...el.com>
Cc:     Jiri Olsa <jolsa@...hat.com>, Ian Rogers <irogers@...gle.com>,
        Andi Kleen <ak@...ux.intel.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V2 0/6] perf intel-pt: Support itrace option flag d+e to
 log on error

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?

- 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