linux-kernel - Re: [PATCH v6 20/25] perf hists browser: Implement hierarchy output

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Date:	Sun, 21 Feb 2016 00:19:08 +0100
From:	Jiri Olsa <jolsa@...hat.com>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Jiri Olsa <jolsa@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>,
	Andi Kleen <andi@...stfloor.org>,
	Stephane Eranian <eranian@...gle.com>,
	Wang Nan <wangnan0@...wei.com>
Subject: Re: [PATCH v6 20/25] perf hists browser: Implement hierarchy output

On Tue, Feb 16, 2016 at 11:08:38PM +0900, Namhyung Kim wrote:
> Implement hierarchy mode in TUI.  The output is look like stdio but it
> also supports to fold/unfold children dynamically.
> 
> Acked-by: Pekka Enberg <penberg@...nel.org>
> Signed-off-by: Namhyung Kim <namhyung@...nel.org>
> ---
>  tools/perf/ui/browsers/hists.c | 269 +++++++++++++++++++++++++++++++++++++----
>  1 file changed, 247 insertions(+), 22 deletions(-)
> 
> diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
> index 857b9beb0aab..d209cf07bd12 100644
> --- a/tools/perf/ui/browsers/hists.c
> +++ b/tools/perf/ui/browsers/hists.c
> @@ -1260,6 +1260,137 @@ static int hist_browser__show_entry(struct hist_browser *browser,
>  	return printed;
>  }
>  
> +static int hist_browser__show_hierarchy_entry(struct hist_browser *browser,
> +					      struct hist_entry *entry,
> +					      unsigned short row,
> +					      int level, int nr_sort_keys)
> +{

SNIP

> +
> +	hists__for_each_format(entry->hists, fmt) {
> +		if (perf_hpp__should_skip(fmt, entry->hists) ||
> +		    column++ < browser->b.horiz_scroll)
> +			continue;
> +
> +		if (perf_hpp__is_sort_entry(fmt) ||
> +		    perf_hpp__is_dynamic_entry(fmt))
> +			break;
> +
> +		if (current_entry && browser->b.navkeypressed) {
> +			ui_browser__set_color(&browser->b,
> +					      HE_COLORSET_SELECTED);
> +		} else {
> +			ui_browser__set_color(&browser->b,
> +					      HE_COLORSET_NORMAL);
> +		}
> +
> +		if (first) {
> +			ui_browser__printf(&browser->b, "%c", folded_sign);
> +			width--;
> +			first = false;
> +		} else {
> +			ui_browser__printf(&browser->b, "  ");
> +			width -= 2;
> +		}
> +
> +		if (fmt->color) {
> +			width -= fmt->color(fmt, &hpp, entry);
> +		} else {
> +			width -= fmt->entry(fmt, &hpp, entry);
> +			ui_browser__printf(&browser->b, "%s", s);
> +		}

same as for stdio patch comment, you might want to use
hist_entry__snprintf_alignment in here

jirka