linux-kernel - Re: [PATCH 01/19] perf tools: Save evsel->pmu in parse

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Date:   Mon, 10 Oct 2022 15:21:33 -0700
From:   Ian Rogers <irogers@...gle.com>
To:     Namhyung Kim <namhyung@...nel.org>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...nel.org>, Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        linux-perf-users@...r.kernel.org,
        Kan Liang <kan.liang@...ux.intel.com>,
        Leo Yan <leo.yan@...aro.org>, Andi Kleen <ak@...ux.intel.com>,
        Athira Rajeev <atrajeev@...ux.vnet.ibm.com>,
        James Clark <james.clark@....com>,
        Xing Zhengjun <zhengjun.xing@...ux.intel.com>
Subject: Re: [PATCH 01/19] perf tools: Save evsel->pmu in parse_events()

On Sun, Oct 9, 2022 at 10:36 PM Namhyung Kim <namhyung@...nel.org> wrote:
>
> Now evsel has a pmu pointer, let's save the info and use it like in
> evsel__find_pmu().
>
> Signed-off-by: Namhyung Kim <namhyung@...nel.org>

Acked-by: Ian Rogers <irogers@...gle.com>

Thanks,
Ian

> ---
>  tools/perf/util/evsel.c        | 1 +
>  tools/perf/util/parse-events.c | 1 +
>  tools/perf/util/pmu.c          | 4 ++++
>  3 files changed, 6 insertions(+)
>
> diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
> index 76605fde3507..196f8e4859d7 100644
> --- a/tools/perf/util/evsel.c
> +++ b/tools/perf/util/evsel.c
> @@ -467,6 +467,7 @@ struct evsel *evsel__clone(struct evsel *orig)
>         evsel->collect_stat = orig->collect_stat;
>         evsel->weak_group = orig->weak_group;
>         evsel->use_config_name = orig->use_config_name;
> +       evsel->pmu = orig->pmu;
>
>         if (evsel__copy_config_terms(evsel, orig) < 0)
>                 goto out_err;
> diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
> index 437389dacf48..9e704841273d 100644
> --- a/tools/perf/util/parse-events.c
> +++ b/tools/perf/util/parse-events.c
> @@ -263,6 +263,7 @@ __add_event(struct list_head *list, int *idx,
>         evsel->core.own_cpus = perf_cpu_map__get(cpus);
>         evsel->core.requires_cpu = pmu ? pmu->is_uncore : false;
>         evsel->auto_merge_stats = auto_merge_stats;
> +       evsel->pmu = pmu;
>
>         if (name)
>                 evsel->name = strdup(name);
> diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
> index 74a2cafb4e8d..15bf5943083a 100644
> --- a/tools/perf/util/pmu.c
> +++ b/tools/perf/util/pmu.c
> @@ -1048,11 +1048,15 @@ struct perf_pmu *evsel__find_pmu(struct evsel *evsel)
>  {
>         struct perf_pmu *pmu = NULL;
>
> +       if (evsel->pmu)
> +               return evsel->pmu;
> +
>         while ((pmu = perf_pmu__scan(pmu)) != NULL) {
>                 if (pmu->type == evsel->core.attr.type)
>                         break;
>         }
>
> +       evsel->pmu = pmu;
>         return pmu;
>  }
>
> --
> 2.38.0.rc1.362.ged0d419d3c-goog
>