diff options
Diffstat (limited to 'lib/igt_stats.h')
| -rw-r--r-- | lib/igt_stats.h | 44 |
1 files changed, 15 insertions, 29 deletions
diff --git a/lib/igt_stats.h b/lib/igt_stats.h index 32f376cc..5faeced4 100644 --- a/lib/igt_stats.h +++ b/lib/igt_stats.h @@ -32,16 +32,17 @@ /** * igt_stats_t: * @values_u64: An array containing pushed integer values + * @is_float: Whether @values_f or @values_u64 is valid * @values_f: An array containing pushed float values * @n_values: The number of pushed values */ typedef struct { + unsigned int n_values; + unsigned int is_float : 1; union { uint64_t *values_u64; double *values_f; }; - unsigned int n_values; - unsigned int is_float : 1; /*< private >*/ unsigned int capacity; @@ -81,37 +82,22 @@ double igt_stats_get_median(igt_stats_t *stats); double igt_stats_get_variance(igt_stats_t *stats); double igt_stats_get_std_deviation(igt_stats_t *stats); +/** + * igt_mean: + * + * Structure to compute running statistical numbers. Needs to be initialized + * with igt_mean_init(). Read out data using igt_mean_get() and + * igt_mean_get_variance(). + */ struct igt_mean { + /*< private >*/ double mean, sq, min, max; unsigned long count; }; -static inline void igt_mean_init(struct igt_mean *m) -{ - memset(m, 0, sizeof(*m)); - m->max = -HUGE_VAL; - m->min = HUGE_VAL; -} - -static inline void igt_mean_add(struct igt_mean *m, double v) -{ - double delta = v - m->mean; - m->mean += delta / ++m->count; - m->sq += delta * (v - m->mean); - if (v < m->min) - m->min = v; - if (v > m->max) - m->max = v; -} - -static inline double igt_mean_get(struct igt_mean *m) -{ - return m->mean; -} - -static inline double igt_mean_get_variance(struct igt_mean *m) -{ - return m->sq / m->count; -} +void igt_mean_init(struct igt_mean *m); +void igt_mean_add(struct igt_mean *m, double v); +double igt_mean_get(struct igt_mean *m); +double igt_mean_get_variance(struct igt_mean *m); #endif /* __IGT_STATS_H__ */ |