| Xiao Guangrong | 0007ece | 2012-09-17 16:31:14 +0800 | [diff] [blame] | 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 | ||||