linux-kernel - Re: [PATCH v3 14/15] perf jevents: Add support for metricgroup descriptions

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Message-ID: <ZGzYroXZUsPTNZVE@kernel.org>
Date:   Tue, 23 May 2023 12:15:58 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Ian Rogers <irogers@...gle.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Kan Liang <kan.liang@...ux.intel.com>,
        Zhengjun Xing <zhengjun.xing@...ux.intel.com>,
        John Garry <john.g.garry@...cle.com>,
        Kajol Jain <kjain@...ux.ibm.com>,
        Thomas Richter <tmricht@...ux.ibm.com>,
        linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org
Subject: Re: [PATCH v3 14/15] perf jevents: Add support for metricgroup
 descriptions

Em Wed, May 17, 2023 at 10:38:03AM -0700, Ian Rogers escreveu:
> Metrics have a field where the groups they belong to are listed like
> the following from
> tools/perf/pmu-events/arch/x86/skylakex/skx-metrics.json:
> 
>         "MetricGroup": "PGO;TmaL1;TopdownL1;tma_L1_group",
>         "MetricName": "tma_frontend_bound",

  LD      /tmp/build/perf-tools-next/util/perf-in.o
  LD      /tmp/build/perf-tools-next/perf-in.o
  CC      /tmp/build/perf-tools-next/pmu-events/pmu-events.o
In file included from /var/home/acme/git/perf-tools-next/tools/include/linux/bitmap.h:9,
                 from /var/home/acme/git/perf-tools-next/tools/perf/util/header.h:10,
                 from /tmp/build/perf-tools-next/pmu-events/pmu-events.c:3:
/tmp/build/perf-tools-next/pmu-events/pmu-events.c: In function ‘describe_metricgroup’:
/var/home/acme/git/perf-tools-next/tools/include/linux/kernel.h:102:25: error: overflow in conversion from ‘long unsigned int’ to ‘int’ changes value from ‘18446744073709551615’ to ‘-1’ [-Werror=overflow]
  102 | #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
      |                         ^
/tmp/build/perf-tools-next/pmu-events/pmu-events.c:61603:29: note: in expansion of macro ‘ARRAY_SIZE’
61603 |         int low = 0, high = ARRAY_SIZE(metricgroups) - 1;
      |                             ^~~~~~~~~~
cc1: all warnings being treated as errors
make[3]: *** [/var/home/acme/git/perf-tools-next/tools/build/Makefile.build:98: /tmp/build/perf-tools-next/pmu-events/pmu-events.o] Error 1
make[2]: *** [Makefile.perf:679: /tmp/build/perf-tools-next/pmu-events/pmu-events-in.o] Error 2
make[1]: *** [Makefile.perf:236: sub-make] Error 2
make: *** [Makefile:113: install-bin] Error 2
make: Leaving directory '/var/home/acme/git/perf-tools-next/tools/perf'

 Performance counter stats for 'make -k BUILD_BPF_SKEL=1 CORESIGHT=1 O=/tmp/build/perf-tools-next -C tools/perf install-bin':

      241752971879      cycles:u
      296060193784      instructions:u                   #    1.22  insn per cycle

       6.129451072 seconds time elapsed

      59.018259000 seconds user
      12.132871000 seconds sys


⬢[acme@...lbox perf-tools-next]$ fg
git rebase -i HEAD~15

[1]+  Stopped                 git rebase -i HEAD~15
⬢[acme@...lbox perf-tools-next]$ git log --oneline -1
995a2beaa64deb7b (HEAD) perf jevents: Add support for metricgroup descriptions
⬢[acme@...lbox perf-tools-next]$

Applied 1-13, pushing to tmp.perf-tools-next,

- Arnaldo