| #ifndef __PERF_STATS_H | |
| #define __PERF_STATS_H | |
| #include "types.h" | |
| struct stats | |
| { | |
| double n, mean, M2; | |
| u64 max, min; | |
| }; | |
| void update_stats(struct stats *stats, u64 val); | |
| double avg_stats(struct stats *stats); | |
| double stddev_stats(struct stats *stats); | |
| double rel_stddev_stats(double stddev, double avg); | |
| static inline void init_stats(struct stats *stats) | |
| { | |
| stats->n = 0.0; | |
| stats->mean = 0.0; | |
| stats->M2 = 0.0; | |
| stats->min = (u64) -1; | |
| stats->max = 0; | |
| } | |
| #endif |