2012-09-17 16:31:14 +08:00
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#ifndef __PERF_STATS_H
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#define __PERF_STATS_H
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2014-04-25 21:31:02 +02:00
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#include <linux/types.h>
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2012-09-17 16:31:14 +08:00
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struct stats
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{
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double n, mean, M2;
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2013-08-02 14:05:40 -06:00
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u64 max, min;
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2012-09-17 16:31:14 +08:00
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};
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void update_stats(struct stats *stats, u64 val);
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double avg_stats(struct stats *stats);
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double stddev_stats(struct stats *stats);
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double rel_stddev_stats(double stddev, double avg);
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2013-08-02 14:05:40 -06:00
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static inline void init_stats(struct stats *stats)
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{
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stats->n = 0.0;
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stats->mean = 0.0;
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stats->M2 = 0.0;
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stats->min = (u64) -1;
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stats->max = 0;
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}
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2012-09-17 16:31:14 +08:00
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#endif
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