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

Jiri Olsa
2015-07-21T12:33:16Z

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@kernel.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