perf stat record: Write stat round events on record (7aad0c32) · Commits · 戴 / test

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. Committer note: After the patch: $ perf report -D | grep PERF_RECORD | grep ROUND 0x852 [0x18]: PERF_RECORD_STAT_ROUND $ Reported-by:

Kan Liang <kan.liang@intel.com> Signed-off-by:

Jiri Olsa <jolsa@kernel.org> Tested-by:

Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1446734469-11352-9-git-send-email-jolsa@kernel.org Signed-off-by:

Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-stat.c

+20 −0

Original line number	Diff line number	Diff line
		@@ -231,6 +231,16 @@ 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
		@@ -306,6 +316,11 @@ 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);
		}

		@@ -1670,6 +1685,11 @@ int cmd_stat(int argc, const char *argv, const char prefix __maybe_unused)
		"older tools may produce warnings about this file\n.");
		}

		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);

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