linux-kernel - [PATCH 34/47] perf stat record: Write stat round events on record

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Message-Id: <1437481927-29538-35-git-send-email-jolsa@kernel.org>
Date:	Tue, 21 Jul 2015 14:31:54 +0200
From:	Jiri Olsa <jolsa@...nel.org>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: [PATCH 34/47] perf stat record: Write stat round events on record

Writing stat round events on 'perf stat record' for
each interval round. In non interval mode we store
round event after the last stat event.

Link: http://lkml.kernel.org/n/tip-a43rs4c6szofeuo2gjlcpm0h@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@...nel.org>
---
 tools/perf/builtin-stat.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 49948be5680f..8ad497522a0e 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -204,6 +204,13 @@ static int process_synthesized_event(struct perf_tool *tool __maybe_unused,
 	return 0;
 }
 
+static int write_stat_round_event(u64 time)
+{
+	return perf_event__synthesize_stat_round(NULL, time,
+						 process_synthesized_event,
+						 NULL);
+}
+
 #define SID(e, x, y) xyarray__entry(e->sample_id, x, y)
 
 static int
@@ -279,6 +286,11 @@ static void process_interval(void)
 	clock_gettime(CLOCK_MONOTONIC, &ts);
 	diff_timespec(&rs, &ts, &ref_time);
 
+	if (STAT_RECORD) {
+		if (write_stat_round_event(rs.tv_sec * NSECS_PER_SEC + rs.tv_nsec))
+			pr_err("failed to write stat round event\n");
+	}
+
 	print_counters(&rs, 0, NULL);
 }
 
@@ -1568,6 +1580,11 @@ int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
 	if (STAT_RECORD) {
 		int fd = perf_data_file__fd(&stat_record.file);
 
+		if (!interval) {
+			if (write_stat_round_event(0))
+				pr_err("failed to write stat round event\n");
+		}
+
 		if (!stat_record.file.is_pipe) {
 			stat_record.session->header.data_size += stat_record.bytes_written;
 			perf_session__write_header(stat_record.session, evsel_list, fd, true);
-- 
2.4.3

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