linux-kernel - [PATCH V2 0/5] Clean up perf mem

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Date:   Thu,  7 Dec 2023 11:23:33 -0800
From:   kan.liang@...ux.intel.com
To:     acme@...nel.org, irogers@...gle.com, peterz@...radead.org,
        mingo@...hat.com, namhyung@...nel.org, jolsa@...nel.org,
        adrian.hunter@...el.com, john.g.garry@...cle.com, will@...nel.org,
        james.clark@....com, mike.leach@...aro.org, leo.yan@...aro.org,
        yuhaixin.yhx@...ux.alibaba.com, renyu.zj@...ux.alibaba.com,
        tmricht@...ux.ibm.com, ravi.bangoria@....com,
        linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Cc:     Kan Liang <kan.liang@...ux.intel.com>
Subject: [PATCH V2 0/5] Clean up perf mem

From: Kan Liang <kan.liang@...ux.intel.com>

Changes since V1:
- Fix strcmp of PMU name checking (Ravi)
- Fix "/," typo (Ian)
- Rename several functions with perf_pmu__mem_events prefix. (Ian)
- Fold the header removal patch into the patch where the cleanups made.
  (Arnaldo)
- Add reviewed-by and tested-by from Ian and Ravi

As discussed in the below thread, the patch set is to clean up perf mem.
https://lore.kernel.org/lkml/afefab15-cffc-4345-9cf4-c6a4128d4d9c@linux.intel.com/

Introduce generic functions perf_mem_events__ptr(),
perf_mem_events__name() ,and is_mem_loads_aux_event() to replace the
ARCH specific ones.
Simplify the perf_mem_event__supported().

Only keeps the ARCH-specific perf_mem_events array in the corresponding
mem-events.c for each ARCH.

There is no functional change.

The patch set touches almost all the ARCHs, Intel, AMD, ARM, Power and
etc. But I can only test it on two Intel platforms.
Please give it try, if you have machines with other ARCHs.

Here are the test results:
Intel hybrid machine:

$perf mem record -e list
ldlat-loads  : available
ldlat-stores : available

$perf mem record -e ldlat-loads -v --ldlat 50
calling: record -e cpu_atom/mem-loads,ldlat=50/P -e cpu_core/mem-loads,ldlat=50/P

$perf mem record -v
calling: record -e cpu_atom/mem-loads,ldlat=30/P -e cpu_atom/mem-stores/P -e cpu_core/mem-loads,ldlat=30/P -e cpu_core/mem-stores/P

$perf mem record -t store -v
calling: record -e cpu_atom/mem-stores/P -e cpu_core/mem-stores/P


Intel SPR:
$perf mem record -e list
ldlat-loads  : available
ldlat-stores : available

$perf mem record -e ldlat-loads -v --ldlat 50
calling: record -e {cpu/mem-loads-aux/,cpu/mem-loads,ldlat=50/}:P

$perf mem record -v
calling: record -e {cpu/mem-loads-aux/,cpu/mem-loads,ldlat=30/}:P -e cpu/mem-stores/P

$perf mem record -t store -v
calling: record -e cpu/mem-stores/P

Kan Liang (5):
  perf mem: Add mem_events into the supported perf_pmu
  perf mem: Clean up perf_mem_events__ptr()
  perf mem: Clean up perf_mem_events__name()
  perf mem: Clean up perf_mem_event__supported()
  perf mem: Clean up is_mem_loads_aux_event()

 tools/perf/arch/arm64/util/mem-events.c   |  36 +----
 tools/perf/arch/arm64/util/pmu.c          |   6 +
 tools/perf/arch/powerpc/util/mem-events.c |  13 +-
 tools/perf/arch/powerpc/util/mem-events.h |   7 +
 tools/perf/arch/powerpc/util/pmu.c        |  11 ++
 tools/perf/arch/s390/util/pmu.c           |   3 +
 tools/perf/arch/x86/util/mem-events.c     |  99 ++----------
 tools/perf/arch/x86/util/pmu.c            |  11 ++
 tools/perf/builtin-c2c.c                  |  28 +++-
 tools/perf/builtin-mem.c                  |  28 +++-
 tools/perf/util/mem-events.c              | 181 +++++++++++++---------
 tools/perf/util/mem-events.h              |  15 +-
 tools/perf/util/pmu.c                     |   4 +-
 tools/perf/util/pmu.h                     |   7 +
 14 files changed, 233 insertions(+), 216 deletions(-)
 create mode 100644 tools/perf/arch/powerpc/util/mem-events.h
 create mode 100644 tools/perf/arch/powerpc/util/pmu.c

-- 
2.35.1