linux-kernel - [tip:perf/core] perf annotate: Store the sample period in each histogram bucket

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Message-ID: <tip-461c17f00f400f95116880d91d20a7fcd84263a9@git.kernel.org>
Date:   Wed, 26 Jul 2017 10:20:28 -0700
From:   tip-bot for Taeung Song <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     wangnan0@...wei.com, tglx@...utronix.de,
        linux-kernel@...r.kernel.org, acme@...hat.com, jolsa@...nel.org,
        mingo@...nel.org, namhyung@...nel.org, dsahern@...il.com,
        adrian.hunter@...el.com, hpa@...or.com, treeze.taeung@...il.com
Subject: [tip:perf/core] perf annotate: Store the sample period in each
 histogram bucket

Commit-ID:  461c17f00f400f95116880d91d20a7fcd84263a9
Gitweb:     http://git.kernel.org/tip/461c17f00f400f95116880d91d20a7fcd84263a9
Author:     Taeung Song <treeze.taeung@...il.com>
AuthorDate: Thu, 20 Jul 2017 17:18:05 -0300
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Fri, 21 Jul 2017 12:02:38 -0300

perf annotate: Store the sample period in each histogram bucket

We'll use it soon, when fixing --show-total-period.

Signed-off-by: Taeung Song <treeze.taeung@...il.com>
Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Wang Nan <wangnan0@...wei.com>
Link: http://lkml.kernel.org/r/1500500215-16646-1-git-send-email-treeze.taeung@gmail.com
[ split from a larger patch, do the math in __symbol__inc_addr_samples() ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/annotate.c | 17 ++++++++++++-----
 tools/perf/util/annotate.h |  1 +
 2 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index c2fe16d..00e085f 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -698,7 +698,7 @@ static int __symbol__account_cycles(struct annotation *notes,
 
 static int __symbol__inc_addr_samples(struct symbol *sym, struct map *map,
 				      struct annotation *notes, int evidx, u64 addr,
-				      struct perf_sample *sample __maybe_unused)
+				      struct perf_sample *sample)
 {
 	unsigned offset;
 	struct sym_hist *h;
@@ -716,10 +716,13 @@ static int __symbol__inc_addr_samples(struct symbol *sym, struct map *map,
 	h = annotation__histogram(notes, evidx);
 	h->nr_samples++;
 	h->addr[offset].nr_samples++;
+	h->period += sample->period;
+	h->addr[offset].period += sample->period;
 
 	pr_debug3("%#" PRIx64 " %s: period++ [addr: %#" PRIx64 ", %#" PRIx64
-		  ", evidx=%d] => %" PRIu64 "\n", sym->start, sym->name,
-		  addr, addr - sym->start, evidx, h->addr[offset].nr_samples);
+		  ", evidx=%d] => nr_samples: %" PRIu64 ", period: %" PRIu64 "\n",
+		  sym->start, sym->name, addr, addr - sym->start, evidx,
+		  h->addr[offset].nr_samples, h->addr[offset].period);
 	return 0;
 }
 
@@ -937,7 +940,7 @@ double disasm__calc_percent(struct annotation *notes, int evidx, s64 offset,
 	struct source_line *src_line = notes->src->lines;
 	double percent = 0.0;
 
-	sample->nr_samples = 0;
+	sample->nr_samples = sample->period = 0;
 
 	if (src_line) {
 		size_t sizeof_src_line = sizeof(*src_line) +
@@ -957,11 +960,15 @@ double disasm__calc_percent(struct annotation *notes, int evidx, s64 offset,
 	} else {
 		struct sym_hist *h = annotation__histogram(notes, evidx);
 		unsigned int hits = 0;
+		u64 period = 0;
 
-		while (offset < end)
+		while (offset < end) {
 			hits += h->addr[offset++].nr_samples;
+			period += h->addr[offset++].period;
+		}
 
 		if (h->nr_samples) {
+			sample->period	   = period;
 			sample->nr_samples = hits;
 			percent = 100.0 * hits / h->nr_samples;
 		}
diff --git a/tools/perf/util/annotate.h b/tools/perf/util/annotate.h
index 720f181..9ce575c 100644
--- a/tools/perf/util/annotate.h
+++ b/tools/perf/util/annotate.h
@@ -88,6 +88,7 @@ double disasm__calc_percent(struct annotation *notes, int evidx, s64 offset,
 
 struct sym_hist {
 	u64		      nr_samples;
+	u64		      period;
 	struct sym_hist_entry addr[0];
 };