linux-kernel - Re: [PATCH v2 8/9] perf annotate browser: Support the toggle number of samples with a 'e' hotkey

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Date:   Wed, 19 Jul 2017 01:18:57 +0900
From:   Namhyung Kim <namhyung@...nel.org>
To:     Taeung Song <treeze.taeung@...il.com>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        linux-kernel@...r.kernel.org, Milian Wolff <milian.wolff@...b.com>,
        Jiri Olsa <jolsa@...hat.com>, kernel-team@....com
Subject: Re: [PATCH v2 8/9] perf annotate browser: Support the toggle number
 of samples with a 'e' hotkey

On Fri, Jul 14, 2017 at 02:46:16AM +0900, Taeung Song wrote:
> 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>

Hmm.. IIUC there're 3 modes of annotation view: percent, period and
sample, right?  The existing 't' hotkey seems to toggle between
percent and period.  And you added 'e' for sample and percent, right?

I'm not sure percent by sample and percent by period are both needed.
If so, I think it's better to add a hotkey to toggle between percent
and value (both for period and sample).  And existing key should
toggle between sample and period.

If percent by sample is not meaningful, I'd rather make the hotkey to
circulate through percent, period and sample.

Thanks,
Namhyung


> ---
>  tools/perf/ui/browsers/annotate.c | 18 +++++++++++++++++-
>  1 file changed, 17 insertions(+), 1 deletion(-)
> 
> diff --git a/tools/perf/ui/browsers/annotate.c b/tools/perf/ui/browsers/annotate.c
> index 34b3189..19173b1 100644
> --- a/tools/perf/ui/browsers/annotate.c
> +++ b/tools/perf/ui/browsers/annotate.c
> @@ -41,6 +41,7 @@ static struct annotate_browser_opt {
>  	     jump_arrows,
>  	     show_linenr,
>  	     show_nr_jumps,
> +	     show_nr_samples,
>  	     show_total_period;
>  } annotate_browser__opts = {
>  	.use_offset	= true,
> @@ -156,6 +157,9 @@ static void annotate_browser__write(struct ui_browser *browser, void *entry, int
>  			if (annotate_browser__opts.show_total_period) {
>  				ui_browser__printf(browser, "%10" PRIu64 " ",
>  						   bdl->samples[i].sample.period);
> +			} else if (annotate_browser__opts.show_nr_samples) {
> +				ui_browser__printf(browser, "%6" PRIu64 " ",
> +						   bdl->samples[i].sample.nr_samples);
>  			} else {
>  				ui_browser__printf(browser, "%6.2f ",
>  						   bdl->samples[i].percent);
> @@ -169,6 +173,8 @@ static void annotate_browser__write(struct ui_browser *browser, void *entry, int
>  		else  {
>  			if (annotate_browser__opts.show_total_period)
>  				ui_browser__printf(browser, "%*s", 11, "Event count");
> +			else if (annotate_browser__opts.show_nr_samples)
> +				ui_browser__printf(browser, "%*s", 7, "Samples");
>  			else
>  				ui_browser__printf(browser, "%*s", 7, "Percent");
>  		}
> @@ -834,6 +840,7 @@ static int annotate_browser__run(struct annotate_browser *browser,
>  		"o             Toggle disassembler output/simplified view\n"
>  		"s             Toggle source code view\n"
>  		"t             Toggle total period view\n"
> +		"e             Toggle number of samples\n"
>  		"/             Search string\n"
>  		"k             Toggle line numbers\n"
>  		"r             Run available scripts\n"
> @@ -914,6 +921,12 @@ static int annotate_browser__run(struct annotate_browser *browser,
>  			  !annotate_browser__opts.show_total_period;
>  			annotate_browser__update_addr_width(browser);
>  			continue;
> +		case 'e':
> +			annotate_browser__opts.show_total_period = false;
> +			annotate_browser__opts.show_nr_samples =
> +				!annotate_browser__opts.show_nr_samples;
> +			annotate_browser__update_addr_width(browser);
> +			continue;
>  		case K_LEFT:
>  		case K_ESC:
>  		case 'q':
> @@ -934,9 +947,11 @@ static int annotate_browser__run(struct annotate_browser *browser,
>  int map_symbol__tui_annotate(struct map_symbol *ms, struct perf_evsel *evsel,
>  			     struct hist_browser_timer *hbt)
>  {
> -	/* Set default value for show_total_period.  */
> +	/* Set default value for show_total_period and show_nr_samples  */
>  	annotate_browser__opts.show_total_period =
>  	  symbol_conf.show_total_period;
> +	annotate_browser__opts.show_nr_samples =
> +		symbol_conf.show_nr_samples;
>  
>  	return symbol__tui_annotate(ms->sym, ms->map, evsel, hbt);
>  }
> @@ -1187,6 +1202,7 @@ static struct annotate_config {
>  	ANNOTATE_CFG(jump_arrows),
>  	ANNOTATE_CFG(show_linenr),
>  	ANNOTATE_CFG(show_nr_jumps),
> +	ANNOTATE_CFG(show_nr_samples),
>  	ANNOTATE_CFG(show_total_period),
>  	ANNOTATE_CFG(use_offset),
>  };
> -- 
> 2.7.4
>