[fio.git] / lib / zipf.h

#ifndef FIO_ZIPF_H
#define FIO_ZIPF_H

#include <inttypes.h>
#include "rand.h"
#include "types.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, uint64_t nranges, double theta, unsigned int seed);
uint64_t zipf_next(struct zipf_state *zs);

void pareto_init(struct zipf_state *zs, uint64_t nranges, double h, unsigned int seed);
uint64_t pareto_next(struct zipf_state *zs);
void zipf_disable_hash(struct zipf_state *zs);

#endif
Commit	Line	Data
e25839d4 JA	1	#ifndef FIO_ZIPF_H
	2	#define FIO_ZIPF_H
	3
b83da9b5	4	#include <inttypes.h>
e25839d4	5	#include "rand.h"
3d2d14bc	6	#include "types.h"
e25839d4 JA	7
	8	struct zipf_state {
	9	uint64_t nranges;
	10	double theta;
	11	double zeta2;
	12	double zetan;
925fee33	13	double pareto_pow;
e25839d4	14	struct frand_state rand;
a5a4fdfd	15	uint64_t rand_off;
8348daf9	16	bool disable_hash;
e25839d4 JA	17	};
e25839d4 JA	18
abb60c32 JA	19	void zipf_init(struct zipf_state *zs, uint64_t nranges, double theta, unsigned int seed);
abb60c32 JA	20	uint64_t zipf_next(struct zipf_state *zs);
e25839d4	21
abb60c32 JA	22	void pareto_init(struct zipf_state *zs, uint64_t nranges, double h, unsigned int seed);
abb60c32 JA	23	uint64_t pareto_next(struct zipf_state *zs);
8348daf9	24	void zipf_disable_hash(struct zipf_state *zs);
925fee33	25
e25839d4	26	#endif