#ifndef FIO_STEADYSTATE_H

#define FIO_STEADYSTATE_H

#include "thread_options.h"

extern void steadystate_free(struct thread_data *);

extern void steadystate_check(void);

extern void steadystate_setup(void);

extern int td_steadystate_init(struct thread_data *);

extern uint64_t steadystate_bw_mean(struct thread_stat *);

extern uint64_t steadystate_iops_mean(struct thread_stat *);

extern bool steadystate_enabled;

struct steadystate_data {

	double limit;

	unsigned long long dur;

	unsigned long long ramp_time;

	uint32_t state;

	unsigned int head;

	unsigned int tail;

	uint64_t *iops_data;

	uint64_t *bw_data;

	double slope;

	double deviation;

	double criterion;

	uint64_t sum_y;

	uint64_t sum_x;

	uint64_t sum_x_sq;

	uint64_t sum_xy;

	uint64_t oldest_y;

	struct timespec prev_time;

	uint64_t prev_iops;

	uint64_t prev_bytes;

};

enum {

	__FIO_SS_IOPS = 0,

	__FIO_SS_BW,

	__FIO_SS_SLOPE,

	__FIO_SS_ATTAINED,

	__FIO_SS_RAMP_OVER,

	__FIO_SS_DATA,

	__FIO_SS_PCT,

	__FIO_SS_BUFFER_FULL,

};

enum {

	FIO_SS_IOPS		= 1 << __FIO_SS_IOPS,

	FIO_SS_BW		= 1 << __FIO_SS_BW,

	FIO_SS_SLOPE		= 1 << __FIO_SS_SLOPE,

	FIO_SS_ATTAINED		= 1 << __FIO_SS_ATTAINED,

	FIO_SS_RAMP_OVER	= 1 << __FIO_SS_RAMP_OVER,

	FIO_SS_DATA		= 1 << __FIO_SS_DATA,

	FIO_SS_PCT		= 1 << __FIO_SS_PCT,

	FIO_SS_BUFFER_FULL	= 1 << __FIO_SS_BUFFER_FULL,

	FIO_SS_IOPS_SLOPE	= FIO_SS_IOPS | FIO_SS_SLOPE,

	FIO_SS_BW_SLOPE		= FIO_SS_BW | FIO_SS_SLOPE,

};

#define STEADYSTATE_MSEC	1000

#endif