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perf stat: Print generic metric header even for failed expressions

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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@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/20170831194036.30146-5-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Andi Kleen 2017-08-31 12:40:29 -07:00 committed by Arnaldo Carvalho de Melo
parent bba49af873
commit 4ed962eb38
1 changed files with 3 additions and 1 deletions
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4
tools/perf/util/stat-shadow.c
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@ -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);
}