[PATCH v3 9/9] perf annotate: Use the sample period when calculating the percentage

From: Taeung Song
Date: Wed Jul 19 2017 - 17:37:31 EST


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@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Signed-off-by: Taeung Song <treeze.taeung@xxxxxxxxx>
---
tools/perf/util/annotate.c | 23 ++++++++++++++++-------
1 file changed, 16 insertions(+), 7 deletions(-)

diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 1cda47e..4cbd124 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -985,10 +985,14 @@ double disasm__calc_percent(struct annotation *notes, int evidx, s64 offset,
p += h->addr[offset++].period;
}

- if (h->total_samples) {
+ if (h->total_period) {
sample->nr_samples = hits;
sample->period = p;
- percent = 100.0 * hits / h->total_samples;
+
+ if (symbol_conf.show_nr_samples)
+ percent = 100.0 * hits / h->total_samples;
+ else
+ percent = 100.0 * p / h->total_period;
}
}

@@ -1730,8 +1734,9 @@ 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;

@@ -1739,14 +1744,18 @@ 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;
- if (h->total_samples)
- percent = 100.0 * nr_samples / h->total_samples;
+ sample = h->addr[i];
+ if (h->total_period) {
+ if (symbol_conf.show_nr_samples)
+ percent = 100.0 * sample.nr_samples / h->total_samples;
+ else
+ 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