tools/perf/util/stat.h

   1 #ifndef __PERF_STATS_H
   2 #define __PERF_STATS_H
   3
   4 #include "types.h"
   5
   6 struct stats
   7 {
   8         double n, mean, M2;
   9 };
  10
  11 void update_stats(struct stats *stats, u64 val);
  12 double avg_stats(struct stats *stats);
  13 double stddev_stats(struct stats *stats);
  14 double rel_stddev_stats(double stddev, double avg);
  15
  16 #endif