linux-kernel - [PATCH v3 0/2] Fix topdown event weak grouping

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Message-Id: <20220517052724.283874-1-irogers@google.com>
Date:   Mon, 16 May 2022 22:27:22 -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>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Riccardo Mancini <rickyman7@...il.com>,
        Kim Phillips <kim.phillips@....com>,
        Madhavan Srinivasan <maddy@...ux.ibm.com>,
        Shunsuke Nakamura <nakamura.shun@...itsu.com>,
        Florian Fischer <florian.fischer@...q.space>,
        Andi Kleen <ak@...ux.intel.com>,
        John Garry <john.garry@...wei.com>,
        Zhengjun Xing <zhengjun.xing@...ux.intel.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        James Clark <james.clark@....com>,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Stephane Eranian <eranian@...gle.com>,
        Ian Rogers <irogers@...gle.com>
Subject: [PATCH v3 0/2] Fix topdown event weak grouping

Keep topdown events within a group when a weak group is broken. This
is a requirement as topdown events must form a group.

Add perf stat testing including for required topdown event group
behaviors.

Note: as with existing topdown evsel/evlist code topdown events are
assumed to be on the PMU "cpu". On Alderlake the PMU "cpu_core" should
also be tested. Future changes can fix Alderlake.

v3. Fix computation of number of events in leader's group.
    Adds reviewed-by: Liang, Kan <kan.liang@...ux.intel.com
v2. Correct behavior wrt pmu prefixed events and avoid the test using
    deprecated events: Suggested-by: Liang, Kan <kan.liang@...ux.intel.com>

Ian Rogers (2):
  perf evlist: Keep topdown counters in weak group
  perf test: Add basic stat and topdown group test

 tools/perf/arch/x86/util/evsel.c | 12 ++++++
 tools/perf/tests/shell/stat.sh   | 67 ++++++++++++++++++++++++++++++++
 tools/perf/util/evlist.c         | 16 +++++++-
 tools/perf/util/evsel.c          | 10 +++++
 tools/perf/util/evsel.h          |  3 ++
 5 files changed, 106 insertions(+), 2 deletions(-)
 create mode 100755 tools/perf/tests/shell/stat.sh

-- 
2.36.0.550.gb090851708-goog