linux-kernel - Re: [PATCH v4 5/9] perf annotate stdio: Support --show-nr-samples option

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Date:   Mon, 14 Aug 2017 13:31:50 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Taeung Song <treeze.taeung@...il.com>
Cc:     Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>,
        linux-kernel@...r.kernel.org, Namhyung Kim <namhyung@...nel.org>,
        Milian Wolff <milian.wolff@...b.com>,
        Jiri Olsa <jolsa@...hat.com>
Subject: Re: [PATCH v4 5/9] perf annotate stdio: Support --show-nr-samples
 option

Em Mon, Aug 14, 2017 at 07:42:07PM +0900, Taeung Song escreveu:
> On 08/01/2017 03:24 PM, Taeung Song wrote:
> > On 07/29/2017 01:26 AM, Arnaldo Carvalho de Melo wrote:
> > > Em Fri, Jul 28, 2017 at 01:16:16AM +0900, Taeung Song escreveu:
> > > > Add --show-nr-samples option to perf-annotate
> > > > so that it corresponds with perf-report.
> > > 
> > > So this is not that intuitive, i.e. if one ask for:
> > > 
> > >    perf annotate --show-total-period --show-nr-samples
> > > 
> > > then both should appear, no?

> > I thought the users can use both --show-total-period and --show-nr-samples,
> > but perf-annotate can preferentially show the total period view IMHO.

That is inapropriate, if the user asks for both --show-total-period and
--show-nr-samples, then it either should show both or bail out telling
that that is not possible.

- Arnaldo

> > What do you think about it ?
> > we need to prevent users from using both ?
> > 
> > Thanks,
> > Taeung
> 
> 
> ping !
> 
> > 
> > > > Cc: Namhyung Kim <namhyung@...nel.org>
> > > > Cc: Milian Wolff <milian.wolff@...b.com>
> > > > Cc: Jiri Olsa <jolsa@...hat.com>
> > > > Signed-off-by: Taeung Song <treeze.taeung@...il.com>
> > > > ---
> > > >   tools/perf/builtin-annotate.c | 2 ++
> > > >   tools/perf/util/annotate.c    | 6 +++++-
> > > >   2 files changed, 7 insertions(+), 1 deletion(-)
> > > > 
> > > > diff --git a/tools/perf/builtin-annotate.c
> > > > b/tools/perf/builtin-annotate.c
> > > > index 6db782d..a8e6db2 100644
> > > > --- a/tools/perf/builtin-annotate.c
> > > > +++ b/tools/perf/builtin-annotate.c
> > > > @@ -447,6 +447,8 @@ int cmd_annotate(int argc, const char **argv)
> > > >               "Show event group information together"),
> > > >       OPT_BOOLEAN(0, "show-total-period",
> > > > &symbol_conf.show_total_period,
> > > >               "Show a column with the sum of periods"),
> > > > +    OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
> > > > +            "Show a column with the number of samples"),
> > > >       OPT_CALLBACK_DEFAULT(0, "stdio-color", NULL, "mode",
> > > >                    "'always' (default), 'never' or 'auto' only
> > > > applicable to --stdio mode",
> > > >                    stdio__config_color, "always"),
> > > > diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
> > > > index 5125c2b..7032bdc 100644
> > > > --- a/tools/perf/util/annotate.c
> > > > +++ b/tools/perf/util/annotate.c
> > > > @@ -1144,6 +1144,9 @@ static int disasm_line__print(struct
> > > > disasm_line *dl, struct symbol *sym, u64 st
> > > >               if (symbol_conf.show_total_period)
> > > >                   color_fprintf(stdout, color, " %11" PRIu64,
> > > >                             sample.period);
> > > > +            else if (symbol_conf.show_nr_samples)
> > > > +                color_fprintf(stdout, color, " %7" PRIu64,
> > > > +                          sample.nr_samples);
> > > >               else
> > > >                   color_fprintf(stdout, color, " %7.2f", percent);
> > > >           }
> > > > @@ -1824,7 +1827,8 @@ int symbol__annotate_printf(struct symbol
> > > > *sym, struct map *map,
> > > >           width *= evsel->nr_members;
> > > >       graph_dotted_len = printf(" %-*.*s|    Source code &
> > > > Disassembly of %s for %s (%" PRIu64 " samples)\n",
> > > > -                  width, width, symbol_conf.show_total_period ?
> > > > "Event count" : "Percent",
> > > > +                  width, width, symbol_conf.show_total_period ?
> > > > "Event count" :
> > > > +                  symbol_conf.show_nr_samples ? "Samples" : "Percent",
> > > >                     d_filename, evsel_name, h->nr_samples);
> > > >       printf("%-*.*s----\n",
> > > > -- 
> > > > 2.7.4