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19135a3447
https://en.wikipedia.org/wiki/Interquartile_mean The IQM is a truncated mean and so is very similar to the scoring method used in sports that are evaluated by a panel of judges: discard the lowest and the highest scores; calculate the mean value of the remaining scores. It's useful to hide outliers in measurements (due to cold cache etc), without having to worry too much about the actual distribution. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
71 lines
2.6 KiB
C
71 lines
2.6 KiB
C
/*
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* Copyright © 2015 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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*/
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#ifndef __IGT_STATS_H__
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#define __IGT_STATS_H__
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#include <stdint.h>
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#include <stdbool.h>
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/**
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* igt_stats_t:
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* @values: An array containing the pushed values
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* @n_values: The number of pushed values
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*/
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typedef struct {
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uint64_t *values;
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unsigned int n_values;
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/*< private >*/
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unsigned int capacity;
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unsigned int is_population : 1;
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unsigned int mean_variance_valid : 1;
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unsigned int sorted_array_valid : 1;
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uint64_t min, max;
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double mean, variance;
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uint64_t *sorted;
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} igt_stats_t;
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void igt_stats_init(igt_stats_t *stats);
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void igt_stats_init_with_size(igt_stats_t *stats, unsigned int capacity);
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void igt_stats_fini(igt_stats_t *stats);
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bool igt_stats_is_population(igt_stats_t *stats);
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void igt_stats_set_population(igt_stats_t *stats, bool full_population);
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void igt_stats_push(igt_stats_t *stats, uint64_t value);
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void igt_stats_push_array(igt_stats_t *stats,
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const uint64_t *values, unsigned int n_values);
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uint64_t igt_stats_get_min(igt_stats_t *stats);
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uint64_t igt_stats_get_max(igt_stats_t *stats);
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uint64_t igt_stats_get_range(igt_stats_t *stats);
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void igt_stats_get_quartiles(igt_stats_t *stats,
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double *q1, double *q2, double *q3);
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double igt_stats_get_iqr(igt_stats_t *stats);
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double igt_stats_get_iqm(igt_stats_t *stats);
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double igt_stats_get_mean(igt_stats_t *stats);
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double igt_stats_get_median(igt_stats_t *stats);
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double igt_stats_get_variance(igt_stats_t *stats);
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double igt_stats_get_std_deviation(igt_stats_t *stats);
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#endif /* __IGT_STATS_H__ */
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