linux-kernel - Re: [PATCH 2/4] perf anntoate browser: Fix the toggle total period view to show period, not number of samples

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Date:   Wed, 12 Jul 2017 17:10:57 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Taeung Song <treeze.taeung@...il.com>
Cc:     linux-kernel@...r.kernel.org, Namhyung Kim <namhyung@...nel.org>,
        Milian Wolff <milian.wolff@...b.com>,
        Jiri Olsa <jolsa@...hat.com>
Subject: Re: [PATCH 2/4] perf anntoate browser: Fix the toggle total period
 view to show period, not number of samples

Em Wed, Jul 12, 2017 at 07:14:10AM +0900, Taeung Song escreveu:
> Currently the toggle total period view on the annotate TUI
> shows the number of samples, not period like below.
> 
>   $ perf annotate --show-total-period
> 
> Percent│
>        │
>        │
>        │    Disassembly of section .text:
>        │
>        │    0000000000109a90 <_mcount@@GLIBC_2.2.5>:
>        │      sub    $0x38,%rsp
>      3 │      mov    %rax,(%rsp)
>      3 │      mov    %rcx,0x8(%rsp)
> 
> This output has two problem:
> 
>   1) Wrong column i.e. 'Percent'
>   2) Show number of samples, not period
> 
> So fix the toggle total period view on the annotate TUI like below.
> 
> Event count│
>            │
>            │
>            │    Disassembly of section .text:
>            │
>            │    0000000000109a90 <_mcount@@GLIBC_2.2.5>:
>            │      sub    $0x38,%rsp
>    2204022 │      mov    %rax,(%rsp)
>    2207405 │      mov    %rcx,0x8(%rsp)
> 
> 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/ui/browsers/annotate.c | 20 +++++++++++++++-----
>  1 file changed, 15 insertions(+), 5 deletions(-)
> 
> diff --git a/tools/perf/ui/browsers/annotate.c b/tools/perf/ui/browsers/annotate.c
> index 73e5ae2..0ddc3b2 100644
> --- a/tools/perf/ui/browsers/annotate.c
> +++ b/tools/perf/ui/browsers/annotate.c
> @@ -18,6 +18,7 @@
>  struct disasm_line_samples {
>  	double		percent;
>  	u64		nr;
> +	u64		period;

So now this becomes a sym_hist_entry? (nr, period)

>  };
>  
>  #define IPC_WIDTH 6
> @@ -113,6 +114,10 @@ static int annotate_browser__pcnt_width(struct annotate_browser *ab)
>  
>  	if (ab->have_cycles)
>  		w += IPC_WIDTH + CYCLES_WIDTH;
> +
> +	if (annotate_browser__opts.show_total_period)
> +		w += 4 * ab->nr_events;
> +
>  	return w;
>  }
>  
> @@ -150,8 +155,8 @@ static void annotate_browser__write(struct ui_browser *browser, void *entry, int
>  						bdl->samples[i].percent,
>  						current_entry);
>  			if (annotate_browser__opts.show_total_period) {
> -				ui_browser__printf(browser, "%6" PRIu64 " ",
> -						   bdl->samples[i].nr);
> +				ui_browser__printf(browser, "%10" PRIu64 " ",
> +						   bdl->samples[i].period);
>  			} else {
>  				ui_browser__printf(browser, "%6.2f ",
>  						   bdl->samples[i].percent);
> @@ -161,9 +166,13 @@ static void annotate_browser__write(struct ui_browser *browser, void *entry, int
>  		ui_browser__set_percent_color(browser, 0, current_entry);
>  
>  		if (!show_title)
> -			ui_browser__write_nstring(browser, " ", 7 * ab->nr_events);
> -		else
> -			ui_browser__printf(browser, "%*s", 7, "Percent");
> +			ui_browser__write_nstring(browser, " ", pcnt_width);
> +		else {
> +			if (annotate_browser__opts.show_total_period)
> +				ui_browser__printf(browser, "%*s", 11, "Event count");
> +			else
> +				ui_browser__printf(browser, "%*s", 7, "Percent");
> +		}
>  	}
>  	if (ab->have_cycles) {
>  		if (dl->ipc)
> @@ -457,6 +466,7 @@ static void annotate_browser__calc_percent(struct annotate_browser *browser,
>  						next ? next->offset : len,
>  						&path, &nr_samples, &period);
>  			bpos->samples[i].nr = nr_samples;
> +			bpos->samples[i].period = period;
>  
>  			if (max_percent < bpos->samples[i].percent)
>  				max_percent = bpos->samples[i].percent;
> -- 
> 2.7.4