From c818cc063089e78bc31845d1eb6a1f0bedee1eae Mon Sep 17 00:00:00 2001
From: Jiri Olsa <jolsa@kernel.org>
Date: Mon, 2 Jul 2018 15:42:02 +0200
Subject: [PATCH] perf stat: Fix --interval_clear option
Currently we display extra header line, like:
# perf stat -I 1000 -a --interval-clear
# time counts unit events
insn per cycle branch-misses of all branches
2.964917103 3855.349912 cpu-clock (msec) # 3.855 CPUs utilized
2.964917103 23,993 context-switches # 0.006 M/sec
2.964917103 1,301 cpu-migrations # 0.329 K/sec
...
Fixing the condition and getting proper:
# perf stat -I 1000 -a --interval-clear
# time counts unit events
2.359048938 1432.492228 cpu-clock (msec) # 1.432 CPUs utilized
2.359048938 7,613 context-switches # 0.002 M/sec
2.359048938 419 cpu-migrations # 0.133 K/sec
...
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Fixes: 9660e08ee8cb ("perf stat: Add --interval-clear option")
Link: http://lkml.kernel.org/r/20180702134202.17745-2-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/builtin-stat.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 22547a490e1f9..05be023c3f0ed 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -1742,7 +1742,7 @@ static void print_interval(char *prefix, struct timespec *ts)
}
}
- if ((num_print_interval == 0 && metric_only) || interval_clear)
+ if ((num_print_interval == 0 || interval_clear) && metric_only)
print_metric_headers(" ", true);
if (++num_print_interval == 25)
num_print_interval = 0;
--
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