diff options
Diffstat (limited to 'src/lib/stats-dist.h')
| -rw-r--r-- | src/lib/stats-dist.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/src/lib/stats-dist.h b/src/lib/stats-dist.h new file mode 100644 index 0000000..2d49f72 --- /dev/null +++ b/src/lib/stats-dist.h @@ -0,0 +1,40 @@ +#ifndef STATS_DIST_H +#define STATS_DIST_H + +struct stats_dist *stats_dist_init(void); +struct stats_dist *stats_dist_init_with_size(unsigned int sample_count); +void stats_dist_deinit(struct stats_dist **stats); + +/* Reset all events. */ +void stats_dist_reset(struct stats_dist *stats); + +/* Add a new event. */ +void stats_dist_add(struct stats_dist *stats, uint64_t value); + +/* Returns number of events added. */ +unsigned int stats_dist_get_count(const struct stats_dist *stats); +/* Returns the sum of all events. */ +uint64_t stats_dist_get_sum(const struct stats_dist *stats); + +/* Returns events' minimum. */ +uint64_t stats_dist_get_min(const struct stats_dist *stats); +/* Returns events' maximum. */ +uint64_t stats_dist_get_max(const struct stats_dist *stats); +/* Returns events' average. */ +double stats_dist_get_avg(const struct stats_dist *stats); +/* Returns events' approximate (through random subsampling) median. */ +uint64_t stats_dist_get_median(struct stats_dist *stats); +/* Returns events' variance */ +double stats_dist_get_variance(const struct stats_dist *stats); +/* Returns events' approximate (through random subsampling) percentile. + fraction parameter is in the range (0., 1.], so 95th %-ile is 0.95. */ +uint64_t stats_dist_get_percentile(struct stats_dist *stats, double fraction); +/* Returns events' approximate (through random subsampling) 95th percentile. */ +static inline uint64_t stats_dist_get_95th(struct stats_dist *stats) +{ + return stats_dist_get_percentile(stats, 0.95); +} +/* Returns the sample array */ +const uint64_t *stats_dist_get_samples(const struct stats_dist *stats, + unsigned int *count_r); +#endif |