linux-kernel - [PATCH v4 0/7] Event parsing fixes

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Message-Id: <20240822132506.1468090-1-james.clark@linaro.org>
Date: Thu, 22 Aug 2024 14:24:44 +0100
From: James Clark <james.clark@...aro.org>
To: irogers@...gle.com,
	linux-perf-users@...r.kernel.org
Cc: James Clark <james.clark@...aro.org>,
	John Garry <john.g.garry@...cle.com>,
	Will Deacon <will@...nel.org>,
	Mike Leach <mike.leach@...aro.org>,
	Leo Yan <leo.yan@...ux.dev>,
	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>,
	Adrian Hunter <adrian.hunter@...el.com>,
	"Liang, Kan" <kan.liang@...ux.intel.com>,
	Weilin Wang <weilin.wang@...el.com>,
	Athira Rajeev <atrajeev@...ux.vnet.ibm.com>,
	Dominique Martinet <asmadeus@...ewreck.org>,
	Yang Jihong <yangjihong@...edance.com>,
	Colin Ian King <colin.i.king@...il.com>,
	Andi Kleen <ak@...ux.intel.com>,
	Ze Gao <zegao2021@...il.com>,
	Jing Zhang <renyu.zj@...ux.alibaba.com>,
	Sun Haiyong <sunhaiyong@...ngson.cn>,
	Yicong Yang <yangyicong@...ilicon.com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v4 0/7] Event parsing fixes

I rebased this one and made some other fixes so that I could test it,
so I thought I'd repost it here in case it's helpful. I also added a
new test.

But for the testing it all looks ok.

There is one small difference where it now shows "stalled-cycles-..."
as <not supported> events, when before it just didn't show them at all when
they weren't supported:

  $ perf stat -- true

  Performance counter stats for 'true':

              0.66 msec task-clock                       #    0.384 CPUs utilized             
                 0      context-switches                 #    0.000 /sec                      
                 0      cpu-migrations                   #    0.000 /sec                      
                52      page-faults                      #   78.999 K/sec                     
     <not counted>      cpu_atom/instructions/                                                  (0.00%)
           978,399      cpu_core/instructions/           #    1.02  insn per cycle            
     <not counted>      cpu_atom/cycles/                                                        (0.00%)
           959,722      cpu_core/cycles/                 #    1.458 GHz                       
   <not supported>      cpu_atom/stalled-cycles-frontend/                                      
   <not supported>      cpu_core/stalled-cycles-frontend/                                      

I don't think that's a big deal though and could probably be fixed up
later if we really want to.

Tested on Raptor Lake, Juno, N1, Ampere (with the DSU cycles PMU) and
I also faked an Apple M on Juno. 

Changes since v3:

  * Rebase onto perf-tools-next 6236ebe07
  * Fix Intel TPEBS counting mode test
  * Fix arm-spe build
  * Add support for DT devices in stat test
  * Add a new test for hybrid perf stat default arguments

Ian Rogers (5):
  perf evsel: Add alternate_hw_config and use in evsel__match
  perf stat: Uniquify event name improvements
  perf stat: Remove evlist__add_default_attrs use strings
  perf evsel x86: Make evsel__has_perf_metrics work for legacy events
  perf evsel: Remove pmu_name

James Clark (2):
  perf test: Make stat test work on DT devices
  perf test: Add a test for default perf stat command

 tools/perf/arch/arm64/util/arm-spe.c          |   4 +-
 tools/perf/arch/x86/util/evlist.c             |  74 +----
 tools/perf/arch/x86/util/evsel.c              |  35 ++-
 tools/perf/builtin-diff.c                     |   6 +-
 tools/perf/builtin-stat.c                     | 291 +++++++-----------
 tools/perf/tests/parse-events.c               |   2 +-
 tools/perf/tests/shell/stat.sh                |  33 +-
 .../perf/tests/shell/test_stat_intel_tpebs.sh |  11 +-
 tools/perf/util/evlist.c                      |  46 +--
 tools/perf/util/evlist.h                      |  12 -
 tools/perf/util/evsel.c                       |  28 +-
 tools/perf/util/evsel.h                       |  22 +-
 tools/perf/util/metricgroup.c                 |   4 +-
 tools/perf/util/parse-events.c                |  58 ++--
 tools/perf/util/parse-events.h                |   8 +-
 tools/perf/util/parse-events.y                |   2 +-
 tools/perf/util/pmu.c                         |   6 +-
 tools/perf/util/pmu.h                         |   2 +-
 tools/perf/util/stat-display.c                | 101 ++++--
 tools/perf/util/stat-shadow.c                 |  14 +-
 tools/perf/util/stat.c                        |   2 +-
 21 files changed, 348 insertions(+), 413 deletions(-)

-- 
2.34.1