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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
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