linux-kernel - [PATCH v4] perf annotate: Fix missing number of samples for source_line

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Date:   Tue, 28 Mar 2017 21:12:05 +0900
From:   Taeung Song <treeze.taeung@...il.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     linux-kernel@...r.kernel.org, Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Wang Nan <wangnan0@...wei.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Taeung Song <treeze.taeung@...il.com>,
        Jiri Olsa <jolsa@...hat.com>, Martin Liska <mliska@...e.cz>
Subject: [PATCH v4] perf annotate: Fix missing number of samples for source_line_samples

The option 'show-total-period' works fine without a option '-l'.
But if running 'perf annotate --stdio -l --show-total-period',
you can see a problem showing only zero '0' for number of samples.

Before:
    $ perf annotate --stdio -l --show-total-period
...
       0 :        400816:       push   %rbp
       0 :        400817:       mov    %rsp,%rbp
       0 :        40081a:       mov    %edi,-0x24(%rbp)
       0 :        40081d:       mov    %rsi,-0x30(%rbp)
       0 :        400821:       mov    -0x24(%rbp),%eax
       0 :        400824:       mov    -0x30(%rbp),%rdx
       0 :        400828:       mov    (%rdx),%esi
       0 :        40082a:       mov    $0x0,%edx
...

The reason is it was missed to set number of samples
of source_line_samples, so set it ordinarily.

After:
    $ perf annotate --stdio -l --show-total-period
...
       3 :        400816:       push   %rbp
       4 :        400817:       mov    %rsp,%rbp
       0 :        40081a:       mov    %edi,-0x24(%rbp)
       0 :        40081d:       mov    %rsi,-0x30(%rbp)
       1 :        400821:       mov    -0x24(%rbp),%eax
       2 :        400824:       mov    -0x30(%rbp),%rdx
       0 :        400828:       mov    (%rdx),%esi
       1 :        40082a:       mov    $0x0,%edx
...

Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Martin Liska <mliska@...e.cz>
Fixes: 0c4a5bcea460 ("perf annotate: Display total number of samples with --show-total-period")
Signed-off-by: Taeung Song <treeze.taeung@...il.com>
---
 tools/perf/util/annotate.c | 6 ++++--
 tools/perf/util/annotate.h | 2 +-
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 11af5f0..a37032b 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -1665,7 +1665,7 @@ 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;
+		u64 offset, nr_samples;
 		double percent_max = 0.0;
 
 		src_line->nr_pcnt = nr_pcnt;
@@ -1674,12 +1674,14 @@ 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];
 			if (h->sum)
-				percent = 100.0 * h->addr[i] / h->sum;
+				percent = 100.0 * nr_samples / h->sum;
 
 			if (percent > percent_max)
 				percent_max = percent;
 			src_line->samples[k].percent = percent;
+			src_line->samples[k].nr = nr_samples;
 		}
 
 		if (percent_max <= 0.5)
diff --git a/tools/perf/util/annotate.h b/tools/perf/util/annotate.h
index 09776b5..948aa8e 100644
--- a/tools/perf/util/annotate.h
+++ b/tools/perf/util/annotate.h
@@ -98,7 +98,7 @@ struct cyc_hist {
 struct source_line_samples {
 	double		percent;
 	double		percent_sum;
-	double          nr;
+	u64		nr;
 };
 
 struct source_line {
-- 
2.7.4