[PATCH 05/41] perf stat: Print generic metric header even for failed expressions

From: Arnaldo Carvalho de Melo
Date: Tue Sep 12 2017 - 11:20:37 EST


From: Andi Kleen <ak@xxxxxxxxxxxxxxx>

Print the generic metric header even when the expression evaluation
failed. Otherwise an expression that fails on the first collections due
to division by zero may suddenly reappear later without an header.

Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Acked-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Link: http://lkml.kernel.org/r/20170831194036.30146-5-andi@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/util/stat-shadow.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/stat-shadow.c b/tools/perf/util/stat-shadow.c
index 96aa6cbf24d6..8c7ab29169b9 100644
--- a/tools/perf/util/stat-shadow.c
+++ b/tools/perf/util/stat-shadow.c
@@ -662,7 +662,9 @@ static void generic_metric(const char *metric_expr,
out->force_header ? name : "",
ratio);
else
- print_metric(ctxp, NULL, NULL, "", 0);
+ print_metric(ctxp, NULL, NULL,
+ out->force_header ?
+ (metric_name ? metric_name : name) : "", 0);
} else
print_metric(ctxp, NULL, NULL, "", 0);
}
--
2.13.5