[fio.git] / lib / zipf.h

#ifndef FIO_ZIPF_H
#define FIO_ZIPF_H

#include <inttypes.h>
#include "rand.h"

struct zipf_state {
	uint64_t nranges;
	double theta;
	double zeta2;
	double zetan;
	double pareto_pow;
	struct frand_state rand;
	uint64_t rand_off;
	bool disable_hash;
};

void zipf_init(struct zipf_state *zs, unsigned long nranges, double theta, unsigned int seed);
unsigned long long zipf_next(struct zipf_state *zs);

void pareto_init(struct zipf_state *zs, unsigned long nranges, double h, unsigned int seed);
unsigned long long pareto_next(struct zipf_state *zs);
void zipf_disable_hash(struct zipf_state *zs);

#endif
Commit	Line	Data
	1	#ifndef FIO_ZIPF_H
	2	#define FIO_ZIPF_H
	3
	4	#include <inttypes.h>
	5	#include "rand.h"
	6
	7	struct zipf_state {
	8	uint64_t nranges;
	9	double theta;
	10	double zeta2;
	11	double zetan;
	12	double pareto_pow;
	13	struct frand_state rand;
	14	uint64_t rand_off;
	15	bool disable_hash;
	16	};
	17
	18	void zipf_init(struct zipf_state *zs, unsigned long nranges, double theta, unsigned int seed);
	19	unsigned long long zipf_next(struct zipf_state *zs);
	20
	21	void pareto_init(struct zipf_state *zs, unsigned long nranges, double h, unsigned int seed);
	22	unsigned long long pareto_next(struct zipf_state *zs);
	23	void zipf_disable_hash(struct zipf_state *zs);
	24
	25	#endif