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#ifndef __PERF_STATS_H
#define __PERF_STATS_H
#include <linux/types.h>
struct stats
{
double n, mean, M2;
u64 max, min;
};
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);
static inline void init_stats(struct stats *stats)
{
stats->n = 0.0;
stats->mean = 0.0;
stats->M2 = 0.0;
stats->min = (u64) -1;
stats->max = 0;
}
#endif
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