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:   Thu, 20 Jul 2017 02:15:56 +0900
From:   Taeung Song <treeze.taeung@...il.com>
To:     Namhyung Kim <namhyung@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     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 07/19/2017 01:18 AM, Namhyung Kim wrote:
> 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
> 
> 

I agree on it. It seems to be better than two hot key !
I'll change this patch based on your comment.

Arnaldo, what do you think about this ?

   On annotate TUI browser
   hot key: 't'
   circulating: "Percent" -> "Sample" -> "Period" -> "Percent" -> ...


Thanks,
Taeung

>> ---
>>   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
>>