linux-kernel - [PATCH v1 00/14] Intel TPEBS min/max/mean/last support

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Message-ID: <20250324223452.208081-1-irogers@google.com>
Date: Mon, 24 Mar 2025 15:34:38 -0700
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, 
	Mark Rutland <mark.rutland@....com>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, 
	Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>, 
	Kan Liang <kan.liang@...ux.intel.com>, Weilin Wang <weilin.wang@...el.com>, 
	James Clark <james.clark@...aro.org>, Xu Yang <xu.yang_2@....com>, 
	John Garry <john.g.garry@...cle.com>, Howard Chu <howardchu95@...il.com>, 
	Levi Yun <yeoreum.yun@....com>, Dominique Martinet <asmadeus@...ewreck.org>, 
	linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v1 00/14] Intel TPEBS min/max/mean/last support

The patches add support to computing the min, max, mean or last
retirement latency and then using that value as the basis for metrics.
When values aren't available, support is added to use the retirement
latency as recorded for an event in the perf json.

Support is added for reading the retirement latency from the forked
perf command more than once. To avoid killing the process commands are
sent through the control fd. Some name handling is changed to make it
more robust.

Ian Rogers (14):
  perf intel-tpebs: Simplify tpebs_cmd
  perf intel-tpebs: Rename tpebs_start to evsel__tpebs_open
  perf intel-tpebs: Separate evsel__tpebs_prepare out of
    evsel__tpebs_open
  perf intel-tpebs: Move cpumap_buf out of evsel__tpebs_open
  perf intel-tpebs: Reduce scope of tpebs_events_size
  perf intel-tpebs: Inline get_perf_record_args
  perf intel-tpebs: Ensure events are opened, factor out finding
  perf intel-tpebs: Refactor tpebs_results list
  perf intel-tpebs: Add support for updating counts in evsel__tpebs_read
  perf intel-tpebs: Add mutex for tpebs_results
  perf intel-tpebs: Don't close record on read
  perf intel-tpebs: Use stats for retirement latency statistics
  perf stat: Add mean, min, max and last --tpebs-mode options
  perf pmu-events: Add retirement latency to JSON events inside of perf

 tools/perf/Documentation/perf-stat.txt   |   7 +
 tools/perf/builtin-stat.c                |  29 +-
 tools/perf/pmu-events/empty-pmu-events.c | 216 ++++----
 tools/perf/pmu-events/jevents.py         |   6 +
 tools/perf/pmu-events/pmu-events.h       |   3 +
 tools/perf/util/evlist.c                 |   1 -
 tools/perf/util/evsel.c                  |  17 +-
 tools/perf/util/evsel.h                  |   6 +
 tools/perf/util/intel-tpebs.c            | 671 ++++++++++++++---------
 tools/perf/util/intel-tpebs.h            |  28 +-
 tools/perf/util/parse-events.c           |   4 +
 tools/perf/util/pmu.c                    |  52 +-
 tools/perf/util/pmu.h                    |   3 +
 13 files changed, 655 insertions(+), 388 deletions(-)

-- 
2.49.0.395.g12beb8f557-goog