Commit-ID: b4229e9d4cac2295f8f04ec26acd571a391c6c37
Gitweb: http://git.kernel.org/tip/b4229e9d4cac2295f8f04ec26acd571a391c6c37
Author: Andi Kleen <ak@xxxxxxxxxxxxxxx>
AuthorDate: Mon, 20 Mar 2017 13:17:01 -0700
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Tue, 21 Mar 2017 16:07:00 -0300
perf stat: Handle partially bad results with merging
When any result that is being merged is bad, mark them all bad to give
consistent output in interval mode.
No before/after, because the issue was only found in theoretical review
and it is hard to reproduce
Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Acked-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Link: http://lkml.kernel.org/r/20170320201711.14142-4-andi@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/builtin-stat.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index a4da10a..cd7dc3b 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -1237,6 +1237,16 @@ static void aggr_cb(struct perf_evsel *counter, void *data, bool first)
if (first)
ad->nr++;
counts = perf_counts(counter->counts, cpu, 0);
+ /*
+ * When any result is bad, make them all to give
+ * consistent output in interval mode.
+ */
+ if (counts->ena == 0 || counts->run == 0 ||
+ counter->counts->scaled == -1) {
+ ad->ena = 0;
+ ad->run = 0;
+ break;
+ }
ad->val += counts->val;
ad->ena += counts->ena;
ad->run += counts->run;
--
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