[linux-2.6-block.git] / tools / perf / util / stat.h

#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
Commit	Line	Data
0007ecea XG	1	#ifndef __PERF_STATS_H
	2	#define __PERF_STATS_H
	3
d944c4ee	4	#include <linux/types.h>
0007ecea XG	5
	6	struct stats
	7	{
	8	double n, mean, M2;
ffe4f3c0	9	u64 max, min;
0007ecea XG	10	};
	11
	12	void update_stats(struct stats *stats, u64 val);
	13	double avg_stats(struct stats *stats);
	14	double stddev_stats(struct stats *stats);
	15	double rel_stddev_stats(double stddev, double avg);
	16
ffe4f3c0 DA	17	static inline void init_stats(struct stats *stats)
	18	{
	19	stats->n = 0.0;
	20	stats->mean = 0.0;
	21	stats->M2 = 0.0;
	22	stats->min = (u64) -1;
	23	stats->max = 0;
	24	}
0007ecea	25	#endif