perf stat: Move 'metric_only_len' to 'struct perf_stat_config'

Move the static 'metric_only_len' variable to 'struct perf_stat_config',
so that it can be passed around and used outside the 'perf stat' command.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180830063252.23729-29-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-stat.c

@@ -176,7 +176,6 @@ static int			print_mixed_hw_group_error;
 static u64			*walltime_run;
 static bool			ru_display			= false;
 static struct rusage		ru_data;
-static unsigned int		metric_only_len			= METRIC_ONLY_LEN;
 
 struct perf_stat {
 	bool			 record;
@@ -200,6 +199,7 @@ static struct perf_stat_config stat_config = {
 	.scale		= true,
 	.unit_width	= 4, /* strlen("unit") */
 	.run_count	= 1,
+	.metric_only_len = METRIC_ONLY_LEN,
 };
 
 static bool is_duration_time(struct perf_evsel *evsel)
@@ -854,14 +854,14 @@ static const char *fixunit(char *buf, struct perf_evsel *evsel,
 	return unit;
 }
 
-static void print_metric_only(struct perf_stat_config *config __maybe_unused,
+static void print_metric_only(struct perf_stat_config *config,
 			      void *ctx, const char *color, const char *fmt,
 			      const char *unit, double val)
 {
 	struct outstate *os = ctx;
 	FILE *out = os->fh;
 	char buf[1024], str[1024];
-	unsigned mlen = metric_only_len;
+	unsigned mlen = config->metric_only_len;
 
 	if (!valid_only_metric(unit))
 		return;
@@ -902,7 +902,7 @@ static void new_line_metric(struct perf_stat_config *config __maybe_unused,
 {
 }
 
-static void print_metric_header(struct perf_stat_config *config __maybe_unused,
+static void print_metric_header(struct perf_stat_config *config,
 				void *ctx, const char *color __maybe_unused,
 				const char *fmt __maybe_unused,
 				const char *unit, double val __maybe_unused)
@@ -916,7 +916,7 @@ static void print_metric_header(struct perf_stat_config *config __maybe_unused,
 	if (config->csv_output)
 		fprintf(os->fh, "%s%s", unit, config->csv_sep);
 	else
-		fprintf(os->fh, "%*s ", metric_only_len, unit);
+		fprintf(os->fh, "%*s ", config->metric_only_len, unit);
 }
 
 static int first_shadow_cpu(struct perf_evsel *evsel, int id)

tools/perf/util/stat.h

@@ -99,6 +99,7 @@ struct perf_stat_config {
 	unsigned int		 timeout;
 	unsigned int		 initial_delay;
 	unsigned int		 unit_width;
+	unsigned int		 metric_only_len;
 	int			 times;
 	int			 run_count;
 	struct runtime_stat	*stats;