[PATCH 34/56] perf stat record: Write stat round events on record

From: Jiri Olsa
Date: Tue Oct 06 2015 - 16:04:33 EST


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@xxxxxxxxxxxxxx
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
---
tools/perf/builtin-stat.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 81ba5955b1da..f053447fde6e 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -205,6 +205,16 @@ static int process_synthesized_event(struct perf_tool *tool __maybe_unused,
return 0;
}

+static int write_stat_round_event(u64 time, u64 type)
+{
+ return perf_event__synthesize_stat_round(NULL, time, type,
+ process_synthesized_event,
+ NULL);
+}
+
+#define WRITE_STAT_ROUND_EVENT(time, interval) \
+ write_stat_round_event(time, PERF_STAT_ROUND_TYPE__ ## interval)
+
#define SID(e, x, y) xyarray__entry(e->sample_id, x, y)

static int
@@ -280,6 +290,11 @@ 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, INTERVAL))
+ pr_err("failed to write stat round event\n");
+ }
+
print_counters(&rs, 0, NULL);
}

@@ -1577,6 +1592,11 @@ int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
if (STAT_RECORD) {
int fd = perf_data_file__fd(&perf_stat.file);

+ if (!interval) {
+ if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats.max, FINAL))
+ pr_err("failed to write stat round event\n");
+ }
+
if (!perf_stat.file.is_pipe) {
perf_stat.session->header.data_size += perf_stat.bytes_written;
perf_session__write_header(perf_stat.session, evsel_list, fd, true);
--
2.4.3

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