perf stat: Reduce scope of ru_stats

The ru_stats are used to capture user and system time stats when a
process exits. These are then applied to user and system time tool
events if their reads fail due to the process terminating. Reduce the
scope now the metric code no longer reads these values.

Signed-off-by: Ian Rogers <[email protected]>

Author: captain5050

tools/perf/builtin-stat.c

@@ -132,6 +132,7 @@ static bool			interval_count;
 static const char		*output_name;
 static int			output_fd;
 static char			*metrics;
+static struct rusage_stats	ru_stats;
 
 struct perf_stat {
 	bool			 record;
@@ -696,6 +697,17 @@ static enum counter_recovery stat_handle_error(struct evsel *counter)
 	return COUNTER_FATAL;
 }
 
+static void update_rusage_stats(const struct rusage *rusage)
+{
+	const u64 us_to_ns = 1000;
+	const u64 s_to_ns = 1000000000;
+
+	update_stats(&ru_stats.ru_utime_usec_stat,
+		(rusage->ru_utime.tv_usec * us_to_ns + rusage->ru_utime.tv_sec * s_to_ns));
+	update_stats(&ru_stats.ru_stime_usec_stat,
+		(rusage->ru_stime.tv_usec * us_to_ns + rusage->ru_stime.tv_sec * s_to_ns));
+}
+
 static int __run_perf_stat(int argc, const char **argv, int run_idx)
 {
 	int interval = stat_config.interval;
@@ -947,7 +959,7 @@ static int __run_perf_stat(int argc, const char **argv, int run_idx)
 		evlist__reset_aggr_stats(evsel_list);
 	} else {
 		update_stats(&walltime_nsecs_stats, t1 - t0);
-		update_rusage_stats(&ru_stats, &stat_config.ru_data);
+		update_rusage_stats(&stat_config.ru_data);
 	}
 
 	/*

tools/perf/util/config.c

@@ -45,7 +45,6 @@ struct perf_stat_config stat_config = {
 	.run_count		= 1,
 	.metric_only_len	= METRIC_ONLY_LEN,
 	.walltime_nsecs_stats	= &walltime_nsecs_stats,
-	.ru_stats		= &ru_stats,
 	.big_num		= true,
 	.ctl_fd			= -1,
 	.ctl_fd_ack		= -1,

tools/perf/util/stat-shadow.c

@@ -18,7 +18,6 @@
 #include "tool_pmu.h"
 
 struct stats walltime_nsecs_stats;
-struct rusage_stats ru_stats;
 
 enum {
 	CTX_BIT_USER	= 1 << 0,
@@ -74,7 +73,6 @@ static int evsel_context(const struct evsel *evsel)
 void perf_stat__reset_shadow_stats(void)
 {
 	memset(&walltime_nsecs_stats, 0, sizeof(walltime_nsecs_stats));
-	memset(&ru_stats, 0, sizeof(ru_stats));
 }
 
 static enum stat_type evsel__stat_type(struct evsel *evsel)

tools/perf/util/stat.h

@@ -102,7 +102,6 @@ struct perf_stat_config {
 	const char		*csv_sep;
 	struct stats		*walltime_nsecs_stats;
 	struct rusage		 ru_data;
-	struct rusage_stats		 *ru_stats;
 	struct cpu_aggr_map	*aggr_map;
 	aggr_get_id_t		 aggr_get_id;
 	struct cpu_aggr_map	*cpus_aggr_map;
@@ -132,25 +131,10 @@ static inline void init_stats(struct stats *stats)
 	stats->max  = 0;
 }
 
-static inline void init_rusage_stats(struct rusage_stats *ru_stats) {
-	init_stats(&ru_stats->ru_utime_usec_stat);
-	init_stats(&ru_stats->ru_stime_usec_stat);
-}
-
-static inline void update_rusage_stats(struct rusage_stats *ru_stats, struct rusage* rusage) {
-	const u64 us_to_ns = 1000;
-	const u64 s_to_ns = 1000000000;
-	update_stats(&ru_stats->ru_utime_usec_stat,
-	             (rusage->ru_utime.tv_usec * us_to_ns + rusage->ru_utime.tv_sec * s_to_ns));
-	update_stats(&ru_stats->ru_stime_usec_stat,
-	             (rusage->ru_stime.tv_usec * us_to_ns + rusage->ru_stime.tv_sec * s_to_ns));
-}
-
 struct evsel;
 struct evlist;
 
 extern struct stats walltime_nsecs_stats;
-extern struct rusage_stats ru_stats;
 
 enum metric_threshold_classify {
 	METRIC_THRESHOLD_UNKNOWN,