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

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Date: Wed, 24 Jan 2024 21:24:11 -0800
From: Namhyung Kim <namhyung@...nel.org>
To: Ian Rogers <irogers@...gle.com>
Cc: kan.liang@...ux.intel.com, acme@...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 Wed, Jan 24, 2024 at 10:24 AM Ian Rogers <irogers@...gle.com> wrote:
>
> 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@linuxintel.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.

Sure, queued for a local testing.

Thanks,
Namhyung