linux-kernel - [PATCH v2 9/9] perf annotate: Use the sample period when calculating the percentage

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Date:   Fri, 14 Jul 2017 02:46:20 +0900
From:   Taeung Song <treeze.taeung@...il.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     linux-kernel@...r.kernel.org, Namhyung Kim <namhyung@...nel.org>,
        Jiri Olsa <jolsa@...hat.com>
Subject: [PATCH v2 9/9] perf annotate: Use the sample period when calculating the percentage

Currently the percentages of perf-annotate are calculated
with number of samples, not the sample period.
So fix it to correspond with perf-report using the sample period
for the calculation.

Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Jiri Olsa <jolsa@...hat.com>
Signed-off-by: Taeung Song <treeze.taeung@...il.com>
---
 tools/perf/util/annotate.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index d9bdedf..28a6d11 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -988,7 +988,7 @@ double disasm__calc_percent(struct annotation *notes, int evidx, s64 offset,
 		if (h->total_samples) {
 			sample->nr_samples = hits;
 			sample->period = p;
-			percent = 100.0 * hits / h->total_samples;
+			percent = 100.0 * p / h->total_period;
 		}
 	}
 
@@ -1730,8 +1730,9 @@ static int symbol__get_source_line(struct symbol *sym, struct map *map,
 	start = map__rip_2objdump(map, sym->start);
 
 	for (i = 0; i < len; i++) {
-		u64 offset, nr_samples;
+		u64 offset;
 		double percent_max = 0.0;
+		struct sym_hist_entry sample;
 
 		src_line->nr_pcnt = nr_pcnt;
 
@@ -1739,15 +1740,15 @@ static int symbol__get_source_line(struct symbol *sym, struct map *map,
 			double percent = 0.0;
 
 			h = annotation__histogram(notes, evidx + k);
-			nr_samples = h->addr[i].nr_samples;
+			sample = h->addr[i];
 
 			if (h->total_samples)
-				percent = 100.0 * nr_samples / h->total_samples;
+				percent = 100.0 * sample.period / h->total_period;
 
 			if (percent > percent_max)
 				percent_max = percent;
 			src_line->samples[k].percent = percent;
-			src_line->samples[k].nr = nr_samples;
+			src_line->samples[k].nr = sample.nr_samples;
 		}
 
 		if (percent_max <= 0.5)
-- 
2.7.4