169 void bch_time_stats_update(struct time_stats *stats, uint64_t start_time)  in bch_time_stats_update()  argument
173 	spin_lock(&stats->lock);  in bch_time_stats_update()
178 	last		= time_after64(now, stats->last)  in bch_time_stats_update()
179 		? now - stats->last : 0;  in bch_time_stats_update()
181 	stats->max_duration = max(stats->max_duration, duration);  in bch_time_stats_update()
183 	if (stats->last) {  in bch_time_stats_update()
184 		ewma_add(stats->average_duration, duration, 8, 8);  in bch_time_stats_update()
186 		if (stats->average_frequency)  in bch_time_stats_update()
187 			ewma_add(stats->average_frequency, last, 8, 8);  in bch_time_stats_update()
189 			stats->average_frequency  = last << 8;  in bch_time_stats_update()
191 		stats->average_duration  = duration << 8;  in bch_time_stats_update()
194 	stats->last = now ?: 1;  in bch_time_stats_update()
196 	spin_unlock(&stats->lock);  in bch_time_stats_update()