linux-kernel - Re: [PATCH v2 0/8] Refactor cpuid and metric table lookup code

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Message-ID: <215ca9a2-0a63-4d0c-8402-5cb1f2bb0794@linaro.org>
Date: Fri, 15 Nov 2024 15:35:55 +0000
From: James Clark <james.clark@...aro.org>
To: Ian Rogers <irogers@...gle.com>, Xu Yang <xu.yang_2@....com>
Cc: John Garry <john.g.garry@...cle.com>, Will Deacon <will@...nel.org>,
 Mike Leach <mike.leach@...aro.org>, Leo Yan <leo.yan@...ux.dev>,
 Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
 Arnaldo Carvalho de Melo <acme@...nel.org>,
 Namhyung Kim <namhyung@...nel.org>, Mark Rutland <mark.rutland@....com>,
 Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
 Jiri Olsa <jolsa@...nel.org>, Adrian Hunter <adrian.hunter@...el.com>,
 Kan Liang <kan.liang@...ux.intel.com>,
 Paul Walmsley <paul.walmsley@...ive.com>, Palmer Dabbelt
 <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>,
 Huacai Chen <chenhuacai@...nel.org>, Bibo Mao <maobibo@...ngson.cn>,
 Athira Rajeev <atrajeev@...ux.vnet.ibm.com>,
 Ben Zong-You Xie <ben717@...estech.com>,
 Alexandre Ghiti <alexghiti@...osinc.com>, Sandipan Das
 <sandipan.das@....com>, Benjamin Gray <bgray@...ux.ibm.com>,
 Ravi Bangoria <ravi.bangoria@....com>,
 Clément Le Goffic <clement.legoffic@...s.st.com>,
 Yicong Yang <yangyicong@...ilicon.com>,
 "Masami Hiramatsu (Google)" <mhiramat@...nel.org>,
 Dima Kogan <dima@...retsauce.net>, "Dr. David Alan Gilbert"
 <linux@...blig.org>, linux-arm-kernel@...ts.infradead.org,
 linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-riscv@...ts.infradead.org
Subject: Re: [PATCH v2 0/8] Refactor cpuid and metric table lookup code

On 07/11/2024 4:20 pm, Ian Rogers wrote:
> Xu Yang <xu.yang_2@....com> reported issues with the system metric
> lookup:
> https://lore.kernel.org/linux-perf-users/20241106085441.3945502-1-xu.yang_2@nxp.com/
> These patches remove a lot of the logic relating CPUIDs to PMUs so
> that the PMU isn't part of the question when finding a metric table.
> For time reasons, it doesn't go as far as allowing system metrics
> without a metric table as a metric table is needed for metrics to
> refer to other metrics, and the refactoring of that resolution is a
> hassle.
> 
> Ian Rogers (7):
>    perf header: Move is_cpu_online to numa bench
>    perf header: Refactor get_cpuid to take a CPU for ARM
>    perf arm64 header: Use cpu argument in get_cpuid
>    perf header: Avoid transitive PMU includes
>    perf header: Pass a perf_cpu rather than a PMU to get_cpuid_str
>    perf jevents: Add map_for_cpu
>    perf pmu: Move pmu_metrics_table__find and remove ARM override
> 
> Xu Yang (1):
>    perf jevents: fix breakage when do perf stat on system metric
> 
>   tools/perf/arch/arm64/util/arm-spe.c     | 14 +---
>   tools/perf/arch/arm64/util/header.c      | 73 ++++++++++-----------
>   tools/perf/arch/arm64/util/pmu.c         | 20 ------
>   tools/perf/arch/loongarch/util/header.c  |  4 +-
>   tools/perf/arch/powerpc/util/header.c    |  4 +-
>   tools/perf/arch/riscv/util/header.c      |  4 +-
>   tools/perf/arch/s390/util/header.c       |  6 +-
>   tools/perf/arch/x86/util/auxtrace.c      |  3 +-
>   tools/perf/arch/x86/util/header.c        |  5 +-
>   tools/perf/bench/numa.c                  | 53 +++++++++++++++
>   tools/perf/builtin-kvm.c                 |  4 +-
>   tools/perf/pmu-events/empty-pmu-events.c | 39 ++++++-----
>   tools/perf/pmu-events/jevents.py         | 39 ++++++-----
>   tools/perf/pmu-events/pmu-events.h       |  2 +-
>   tools/perf/tests/expr.c                  |  5 +-
>   tools/perf/util/env.c                    |  4 +-
>   tools/perf/util/expr.c                   |  6 +-
>   tools/perf/util/header.c                 | 82 ++++++++----------------
>   tools/perf/util/header.h                 | 23 +++----
>   tools/perf/util/pmu.c                    | 25 --------
>   tools/perf/util/pmu.h                    |  2 -
>   tools/perf/util/probe-event.c            |  1 +
>   22 files changed, 189 insertions(+), 229 deletions(-)
> 

Reviewed-by: James Clark <james.clark@...aro.org>