linux-kernel - Re: [PATCH 14/26] perf tools: Add mmap3 events to --show-mmap-events option

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Date:   Mon, 14 Sep 2020 15:30:53 +0900
From:   Namhyung Kim <namhyung@...nel.org>
To:     Jiri Olsa <jolsa@...nel.org>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Ingo Molnar <mingo@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Michael Petlan <mpetlan@...hat.com>,
        Song Liu <songliubraving@...com>,
        "Frank Ch. Eigler" <fche@...hat.com>,
        Ian Rogers <irogers@...gle.com>,
        Stephane Eranian <eranian@...gle.com>,
        Alexey Budankov <alexey.budankov@...ux.intel.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Adrian Hunter <adrian.hunter@...el.com>
Subject: Re: [PATCH 14/26] perf tools: Add mmap3 events to --show-mmap-events option

On Mon, Sep 14, 2020 at 6:04 AM Jiri Olsa <jolsa@...nel.org> wrote:
>
> Displaying mmap3 events for --show-mmap-events option,
> the build id is displayed within <> braces:
>
>   $ perf script --show-mmap-events
>   kill 12148 13893.519014: PERF_RECORD_MMAP3 12148/12148: <43938d0803c5e3130ea679cd569aaf44b98d9ae8> [0x560e7d7f..
>   kill 12148 13893.519420: PERF_RECORD_MMAP3 12148/12148: <1805c738c8f3ec0f47b7ea09080c28f34d18a82b> [0x7f9e7dfc..
>
> Signed-off-by: Jiri Olsa <jolsa@...nel.org>
> ---
>  tools/perf/builtin-script.c | 33 +++++++++++++++++++++++++++++++++
>  1 file changed, 33 insertions(+)
>
> diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
> index d839983cfb88..9c09581d5cb0 100644
> --- a/tools/perf/builtin-script.c
> +++ b/tools/perf/builtin-script.c
> @@ -2342,6 +2342,38 @@ static int process_mmap2_event(struct perf_tool *tool,
>                            event->mmap2.tid);
>  }
>
> +static int process_mmap3_event(struct perf_tool *tool,
> +                             union perf_event *event,
> +                             struct perf_sample *sample,
> +                             struct machine *machine)
> +{
> +       struct thread *thread;
> +       struct perf_script *script = container_of(tool, struct perf_script, tool);
> +       struct perf_session *session = script->session;
> +       struct evsel *evsel = perf_evlist__id2evsel(session->evlist, sample->id);
> +
> +       if (perf_event__process_mmap3(tool, event, sample, machine) < 0)
> +               return -1;
> +
> +       thread = machine__findnew_thread(machine, event->mmap3.pid, event->mmap3.tid);
> +       if (thread == NULL) {
> +               pr_debug("problem processing MMAP2 event, skipping it.\n");

MMAP3 ?

Thanks
Namhyung


> +               return -1;
> +       }
> +
> +       if (!evsel->core.attr.sample_id_all) {
> +               sample->cpu = 0;
> +               sample->time = 0;
> +               sample->tid = event->mmap3.tid;
> +               sample->pid = event->mmap3.pid;
> +       }
> +       perf_sample__fprintf_start(script, sample, thread, evsel,
> +                                  PERF_RECORD_MMAP3, stdout);
> +       perf_event__fprintf(event, machine, stdout);
> +       thread__put(thread);
> +       return 0;
> +}
> +
>  static int process_switch_event(struct perf_tool *tool,
>                                 union perf_event *event,
>                                 struct perf_sample *sample,
> @@ -2498,6 +2530,7 @@ static int __cmd_script(struct perf_script *script)
>         if (script->show_mmap_events) {
>                 script->tool.mmap = process_mmap_event;
>                 script->tool.mmap2 = process_mmap2_event;
> +               script->tool.mmap3 = process_mmap3_event;
>         }
>         if (script->show_switch_events || (scripting_ops && scripting_ops->process_switch))
>                 script->tool.context_switch = process_switch_event;
> --
> 2.26.2
>