diff options
| author | Damien Lespiau <damien.lespiau@intel.com> | 2015-06-25 23:57:49 +0100 |
|---|---|---|
| committer | Damien Lespiau <damien.lespiau@intel.com> | 2015-06-27 16:03:27 +0100 |
| commit | 05c10f940f9df3a5b24e2a0b476052fbe5a22282 (patch) | |
| tree | b1f99b0cd722b7d6da6c9695d090932c7c3050ad /lib/igt_stats.h | |
| parent | 9986282c2bb4508a1fd9b774e30e1f4e405ac82e (diff) | |
stats: Use an algorithm popularised by Knuth to compute mean and variance
Suggested-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Diffstat (limited to 'lib/igt_stats.h')
| -rw-r--r-- | lib/igt_stats.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/igt_stats.h b/lib/igt_stats.h index a46b399c..acb86a6b 100644 --- a/lib/igt_stats.h +++ b/lib/igt_stats.h @@ -28,9 +28,12 @@ typedef struct { uint64_t *values; unsigned int capacity; unsigned int n_values; + unsigned int mean_variance_valid : 1; + double mean, variance; } igt_stats_t; void igt_stats_init(igt_stats_t *stats, unsigned int capacity); void igt_stats_fini(igt_stats_t *stats); void igt_stats_push(igt_stats_t *stats, uint64_t value); double igt_stats_get_mean(igt_stats_t *stats); +double igt_stats_get_variance(igt_stats_t *stats); |