linux-kernel - Re: [RFC PATCH v7 0/6] TPEBS counting mode support

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Message-ID: <CAM9d7cj2EbxWVLHU3XPf_F2OzWRVRfSV2TghNA+h8noDztrasQ@mail.gmail.com>
Date: Mon, 22 Apr 2024 12:10:18 -0700
From: Namhyung Kim <namhyung@...nel.org>
To: weilin.wang@...el.com
Cc: Ian Rogers <irogers@...gle.com>, Arnaldo Carvalho de Melo <acme@...nel.org>, 
	Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, 
	Adrian Hunter <adrian.hunter@...el.com>, Kan Liang <kan.liang@...ux.intel.com>, 
	linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Perry Taylor <perry.taylor@...el.com>, Samantha Alt <samantha.alt@...el.com>, 
	Caleb Biggers <caleb.biggers@...el.com>
Subject: Re: [RFC PATCH v7 0/6] TPEBS counting mode support

Hello Weilin,

On Tue, Apr 2, 2024 at 2:45 PM <weilin.wang@...el.com> wrote:
>
> From: Weilin Wang <weilin.wang@...el.com>
>
> Changes in v7:
> - Update code and comments for better code quality [Namhyung]
> - Add a separate commit for perf data [Namhyung]
> - Update retire latency print function to improve alignment [Namhyung]
>
> v6: https://lore.kernel.org/all/20240329191224.1046866-1-weilin.wang@intel.com/

In general, I think you need to explain what exactly TPEBS is and why
you want to do this for TPEBS.  Maybe somewhere in the documentation.

Thanks,
Namhyung

>
> Weilin Wang (6):
>   perf stat: Parse and find tpebs events when parsing metrics to prepare
>     for perf record sampling
>   perf data: Allow to use given fd in data->file.fd
>   perf stat: Fork and launch perf record when perf stat needs to get
>     retire latency value for a metric.
>   perf stat: Add retire latency values into the expr_parse_ctx to
>     prepare for final metric calculation
>   perf stat: Add retire latency print functions to print out at the very
>     end of print out
>   perf vendor events intel: Add MTL metric json files
>
>  tools/perf/builtin-stat.c                     |  249 +-
>  .../arch/x86/meteorlake/metricgroups.json     |  127 +
>  .../arch/x86/meteorlake/mtl-metrics.json      | 2551 +++++++++++++++++
>  tools/perf/util/data.c                        |    7 +-
>  tools/perf/util/metricgroup.c                 |   87 +-
>  tools/perf/util/metricgroup.h                 |   22 +-
>  tools/perf/util/stat-display.c                |   69 +
>  tools/perf/util/stat-shadow.c                 |   19 +
>  tools/perf/util/stat.h                        |    4 +
>  9 files changed, 3115 insertions(+), 20 deletions(-)
>  create mode 100644 tools/perf/pmu-events/arch/x86/meteorlake/metricgroups.json
>  create mode 100644 tools/perf/pmu-events/arch/x86/meteorlake/mtl-metricsjson
>
> --
> 2.43.0
>
>