tools/perf/util/stat.h


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#ifndef __PERF_STATS_H
#define __PERF_STATS_H

#include "types.h"

struct stats
{
	double n, mean, M2;
};

void update_stats(struct stats *stats, u64 val);
double avg_stats(struct stats *stats);
double stddev_stats(struct stats *stats);
double rel_stddev_stats(double stddev, double avg);

#endif