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

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Date: Wed, 24 Jan 2024 10:24:41 -0800
From: Ian Rogers <irogers@...gle.com>
To: kan.liang@...ux.intel.com
Cc: acme@...nel.org, namhyung@...nel.org, peterz@...radead.org, 
	mingo@...hat.com, 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, 
	atrajeev@...ux.vnet.ibm.com, linux-kernel@...r.kernel.org, 
	linux-perf-users@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH V4 0/7] Clean up perf mem

On Tue, Jan 23, 2024 at 10:51 AM <kan.liang@...ux.intel.com> wrote:
>
> 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()

I think this is ready to land in perf-tools-next, multiple Tested-by
or Reviewed-by.

Thanks,
Ian

>  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
>