linux-kernel - Re: [PATCH v3 2/9] perf annotate: Properly rename 'sum' to 'total_samples' in struct sym

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Message-ID: <20170720191316.GC4134@kernel.org>
Date:   Thu, 20 Jul 2017 16:13:16 -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>,
        Jiri Olsa <jolsa@...hat.com>
Subject: Re: [PATCH v3 2/9] perf annotate: Properly rename 'sum' to
 'total_samples' in struct sym_hist

Em Thu, Jul 20, 2017 at 06:36:51AM +0900, Taeung Song escreveu:
> Cc: Namhyung Kim <namhyung@...nel.org>
> Cc: Jiri Olsa <jolsa@...hat.com>
> Signed-off-by: Taeung Song <treeze.taeung@...il.com>

Better to rename it to symhist->nr_samples, to be consistent with the
per address nr_samples, i.e.

 sym_hist->nr_samples = sum(sym_hist->addr[0 ..  symbol__size(sym)]->nr_samples)

I'm tentatively doing it here, holler if you guys dislike it...

- Arnaldo

> ---
>  tools/perf/ui/gtk/annotate.c |  2 +-
>  tools/perf/util/annotate.c   | 22 +++++++++++-----------
>  tools/perf/util/annotate.h   |  2 +-
>  3 files changed, 13 insertions(+), 13 deletions(-)
> 
> diff --git a/tools/perf/ui/gtk/annotate.c b/tools/perf/ui/gtk/annotate.c
> index d736fd5..c088abe 100644
> --- a/tools/perf/ui/gtk/annotate.c
> +++ b/tools/perf/ui/gtk/annotate.c
> @@ -37,7 +37,7 @@ static int perf_gtk__get_percent(char *buf, size_t size, struct symbol *sym,
>  	if (!symbol_conf.event_group && !symhist->addr[dl->offset].nr_samples)
>  		return 0;
>  
> -	percent = 100.0 * symhist->addr[dl->offset].nr_samples / symhist->sum;
> +	percent = 100.0 * symhist->addr[dl->offset].nr_samples / symhist->total_samples;
>  
>  	markup = perf_gtk__get_percent_color(percent);
>  	if (markup)
> diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
> index c382955..a62067a 100644
> --- a/tools/perf/util/annotate.c
> +++ b/tools/perf/util/annotate.c
> @@ -713,7 +713,7 @@ static int __symbol__inc_addr_samples(struct symbol *sym, struct map *map,
>  
>  	offset = addr - sym->start;
>  	h = annotation__histogram(notes, evidx);
> -	h->sum++;
> +	h->total_samples++;
>  	h->addr[offset].nr_samples++;
>  
>  	pr_debug3("%#" PRIx64 " %s: period++ [addr: %#" PRIx64 ", %#" PRIx64
> @@ -957,9 +957,9 @@ double disasm__calc_percent(struct annotation *notes, int evidx, s64 offset,
>  		while (offset < end)
>  			hits += h->addr[offset++].nr_samples;
>  
> -		if (h->sum) {
> +		if (h->total_samples) {
>  			sample->nr_samples = hits;
> -			percent = 100.0 * hits / h->sum;
> +			percent = 100.0 * hits / h->total_samples;
>  		}
>  	}
>  
> @@ -1672,13 +1672,13 @@ static int symbol__get_source_line(struct symbol *sym, struct map *map,
>  	struct sym_hist *h = annotation__histogram(notes, evidx);
>  	struct rb_root tmp_root = RB_ROOT;
>  	int nr_pcnt = 1;
> -	u64 h_sum = h->sum;
> +	u64 h_sum = h->total_samples;
>  	size_t sizeof_src_line = sizeof(struct source_line);
>  
>  	if (perf_evsel__is_group_event(evsel)) {
>  		for (i = 1; i < evsel->nr_members; i++) {
>  			h = annotation__histogram(notes, evidx + i);
> -			h_sum += h->sum;
> +			h_sum += h->total_samples;
>  		}
>  		nr_pcnt = evsel->nr_members;
>  		sizeof_src_line += (nr_pcnt - 1) * sizeof(src_line->samples);
> @@ -1704,8 +1704,8 @@ static int symbol__get_source_line(struct symbol *sym, struct map *map,
>  
>  			h = annotation__histogram(notes, evidx + k);
>  			nr_samples = h->addr[i].nr_samples;
> -			if (h->sum)
> -				percent = 100.0 * nr_samples / h->sum;
> +			if (h->total_samples)
> +				percent = 100.0 * nr_samples / h->total_samples;
>  
>  			if (percent > percent_max)
>  				percent_max = percent;
> @@ -1777,7 +1777,7 @@ static void symbol__annotate_hits(struct symbol *sym, struct perf_evsel *evsel)
>  		if (h->addr[offset].nr_samples != 0)
>  			printf("%*" PRIx64 ": %" PRIu64 "\n", BITS_PER_LONG / 2,
>  			       sym->start + offset, h->addr[offset].nr_samples);
> -	printf("%*s: %" PRIu64 "\n", BITS_PER_LONG / 2, "h->sum", h->sum);
> +	printf("%*s: %" PRIu64 "\n", BITS_PER_LONG / 2, "h->total_samples", h->total_samples);
>  }
>  
>  int symbol__annotate_printf(struct symbol *sym, struct map *map,
> @@ -1813,7 +1813,7 @@ 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, "Percent", d_filename, evsel_name, h->sum);
> +	       width, width, "Percent", d_filename, evsel_name, h->total_samples);
>  
>  	printf("%-*.*s----\n",
>  	       graph_dotted_len, graph_dotted_len, graph_dotted_line);
> @@ -1877,10 +1877,10 @@ void symbol__annotate_decay_histogram(struct symbol *sym, int evidx)
>  	struct sym_hist *h = annotation__histogram(notes, evidx);
>  	int len = symbol__size(sym), offset;
>  
> -	h->sum = 0;
> +	h->total_samples = 0;
>  	for (offset = 0; offset < len; ++offset) {
>  		h->addr[offset].nr_samples = h->addr[offset].nr_samples * 7 / 8;
> -		h->sum += h->addr[offset].nr_samples;
> +		h->total_samples += h->addr[offset].nr_samples;
>  	}
>  }
>  
> diff --git a/tools/perf/util/annotate.h b/tools/perf/util/annotate.h
> index 3a17663..bef1d02 100644
> --- a/tools/perf/util/annotate.h
> +++ b/tools/perf/util/annotate.h
> @@ -87,7 +87,7 @@ double disasm__calc_percent(struct annotation *notes, int evidx, s64 offset,
>  			    s64 end, const char **path, struct sym_hist_entry *sample);
>  
>  struct sym_hist {
> -	u64		sum;
> +	u64		total_samples;
>  	struct sym_hist_entry addr[0];
>  };
>  
> -- 
> 2.7.4