linux-kernel - [PATCH V4 0/7] Clean up perf mem

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Message-Id: <20240123185036.3461837-1-kan.liang@linux.intel.com>
Date: Tue, 23 Jan 2024 10:50:29 -0800
From: kan.liang@...ux.intel.com
To: acme@...nel.org,
	namhyung@...nel.org,
	irogers@...gle.com,
	peterz@...radead.org,
	mingo@...hat.com,
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	linux-kernel@...r.kernel.org,
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Cc: Kan Liang <kan.liang@...ux.intel.com>
Subject: [PATCH V4 0/7] Clean up perf mem

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

Changes since V3:
- Fix the powerPC building error (Kajol Jain)
- The s390 does not support perf mem. Remove the code. (Thomas)
- Add reviewed-by and tested-by from Kajol Jain for patch 1 and 2
- Add tested-by from Leo

Changes since V2:
- Fix the Arm64 building error (Leo)
- Add two new patches to clean up perf_mem_events__record_args()
  and perf_pmus__num_mem_pmus() (Leo)

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 (7):
  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()
  perf mem: Clean up perf_mem_events__record_args()
  perf mem: Clean up perf_pmus__num_mem_pmus()

 tools/perf/arch/arm/util/pmu.c            |   3 +
 tools/perf/arch/arm64/util/mem-events.c   |  39 +---
 tools/perf/arch/arm64/util/mem-events.h   |   7 +
 tools/perf/arch/powerpc/util/Build        |   1 +
 tools/perf/arch/powerpc/util/mem-events.c |  16 +-
 tools/perf/arch/powerpc/util/mem-events.h |   7 +
 tools/perf/arch/powerpc/util/pmu.c        |  12 ++
 tools/perf/arch/x86/util/mem-events.c     |  99 ++--------
 tools/perf/arch/x86/util/mem-events.h     |  10 +
 tools/perf/arch/x86/util/pmu.c            |  19 +-
 tools/perf/builtin-c2c.c                  |  45 ++---
 tools/perf/builtin-mem.c                  |  48 ++---
 tools/perf/util/mem-events.c              | 217 +++++++++++++---------
 tools/perf/util/mem-events.h              |  19 +-
 tools/perf/util/pmu.c                     |   4 +-
 tools/perf/util/pmu.h                     |   7 +
 tools/perf/util/pmus.c                    |   6 -
 tools/perf/util/pmus.h                    |   1 -
 18 files changed, 279 insertions(+), 281 deletions(-)
 create mode 100644 tools/perf/arch/arm64/util/mem-events.h
 create mode 100644 tools/perf/arch/powerpc/util/mem-events.h
 create mode 100644 tools/perf/arch/powerpc/util/pmu.c
 create mode 100644 tools/perf/arch/x86/util/mem-events.h

-- 
2.35.1