1#ifndef __PERF_STATS_H 2#define __PERF_STATS_H 3 4#include "types.h" 5 6struct stats 7{ 8 double n, mean, M2; 9}; 10 11void update_stats(struct stats *stats, u64 val); 12double avg_stats(struct stats *stats); 13double stddev_stats(struct stats *stats); 14double rel_stddev_stats(double stddev, double avg); 15 16#endif 17