linux-kernel - Re: [PATCH V3 0/7] Clean up perf mem

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Date: Sun, 7 Jan 2024 12:08:21 +0800
From: Leo Yan <leo.yan@...aro.org>
To: kan.liang@...ux.intel.com
Cc: 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,
	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 V3 0/7] Clean up perf mem

On Wed, Dec 13, 2023 at 11:51:47AM -0800, kan.liang@...ux.intel.com wrote:

[...]

> 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

After applying this series, below tests pass with Arm SPE:

# ./perf c2c record -- /home/leoy/false_sharing.exe 2
# ./perf c2c report

# ./perf mem record -e list
# ./perf mem record -e spe-load -v --ldlat 50
# ./perf mem record -v
# ./perf mem report
# ./perf mem record -t store -v
# ./perf mem report

Tested-by: Leo Yan <leo.yan@...aro.org>