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perf stat record: Write stat round events on record

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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>
This commit is contained in:
Jiri Olsa 2015-11-05 15:40:52 +01:00 committed by Arnaldo Carvalho de Melo
parent 5a6ea81b8f
commit 7aad0c32bb
1 changed files with 20 additions and 0 deletions
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20
tools/perf/builtin-stat.c
View file

@ -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);