perf stat: Reduce scope of walltime_nsecs_stats

walltime_nsecs_stats is no longer used for counter values, move into
that stat_config where it controls certain things like noise
measurement.

Signed-off-by: Ian Rogers <[e-mail]>
Signed-off-by: Namhyung Kim <[e-mail]>

tools/perf/builtin-stat.c

···
 static void perf_stat__reset_stats(void)
 {
 	evlist__reset_stats(evsel_list);
-	perf_stat__reset_shadow_stats();
+	memset(stat_config.walltime_nsecs_stats, 0, sizeof(*stat_config.walltime_nsecs_stats));
 }
 
 static int process_synthesized_event(const struct perf_tool *tool __maybe_unused,
···
 			pr_err("failed to write stat round event\n");
 	}
 
-	init_stats(&walltime_nsecs_stats);
-	update_stats(&walltime_nsecs_stats, stat_config.interval * 1000000ULL);
+	init_stats(stat_config.walltime_nsecs_stats);
+	update_stats(stat_config.walltime_nsecs_stats, stat_config.interval * 1000000ULL);
 	print_counters(&rs, 0, NULL);
 }
 
···
 	if (interval && stat_config.summary) {
 		stat_config.interval = 0;
 		stat_config.stop_read_counter = true;
-		init_stats(&walltime_nsecs_stats);
-		update_stats(&walltime_nsecs_stats, t1 - t0);
+		init_stats(stat_config.walltime_nsecs_stats);
+		update_stats(stat_config.walltime_nsecs_stats, t1 - t0);
 
 		evlist__copy_prev_raw_counts(evsel_list);
 		evlist__reset_prev_raw_counts(evsel_list);
 		evlist__reset_aggr_stats(evsel_list);
 	} else {
-		update_stats(&walltime_nsecs_stats, t1 - t0);
+		update_stats(stat_config.walltime_nsecs_stats, t1 - t0);
 		update_rusage_stats(&stat_config.ru_data);
 	}
 
···
 	process_counters();
 
 	if (stat_round->type == PERF_STAT_ROUND_TYPE__FINAL)
-		update_stats(&walltime_nsecs_stats, stat_round->time);
+		update_stats(stat_config.walltime_nsecs_stats, stat_round->time);
 
 	if (stat_config.interval && stat_round->time) {
 		tsh.tv_sec  = stat_round->time / NSEC_PER_SEC;
···
 		}
 
 		if (!interval) {
-			if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats.max, FINAL))
+			if (WRITE_STAT_ROUND_EVENT(stat_config.walltime_nsecs_stats->max, FINAL))
 				pr_err("failed to write stat round event\n");
 		}
 

tools/perf/tests/parse-metric.c

···
 		count = find_value(evsel->name, vals);
 		evsel->supported = true;
 		evsel->stats->aggr->counts.val = count;
-		if (evsel__name_is(evsel, "duration_time"))
-			update_stats(&walltime_nsecs_stats, count);
 	}
 }
 

tools/perf/tests/pmu-events.c

···
 	evlist__alloc_aggr_stats(evlist, 1);
 	evlist__for_each_entry(evlist, evsel) {
 		evsel->stats->aggr->counts.val = k;
-		if (evsel__name_is(evsel, "duration_time"))
-			update_stats(&walltime_nsecs_stats, k);
 		k++;
 	}
 	evlist__for_each_entry(evlist, evsel) {

tools/perf/util/config.c

···
 
 #define METRIC_ONLY_LEN 20
 
+static struct stats walltime_nsecs_stats;
+
 struct perf_stat_config stat_config = {
 	.aggr_mode		= AGGR_GLOBAL,
 	.aggr_level		= MAX_CACHE_LVL + 1,

tools/perf/util/stat-shadow.c

···
 #include "util/hashmap.h"
 #include "tool_pmu.h"
 
-struct stats walltime_nsecs_stats;
-
-void perf_stat__reset_shadow_stats(void)
-{
-	memset(&walltime_nsecs_stats, 0, sizeof(walltime_nsecs_stats));
-}
-
 static bool tool_pmu__is_time_event(const struct perf_stat_config *config,
 				   const struct evsel *evsel, int *tool_aggr_idx)
 {

tools/perf/util/stat.h

···
 struct evsel;
 struct evlist;
 
-extern struct stats walltime_nsecs_stats;
-
 enum metric_threshold_classify {
 	METRIC_THRESHOLD_UNKNOWN,
 	METRIC_THRESHOLD_BAD,