1#ifndef FIO_STEADYSTATE_H
2#define FIO_STEADYSTATE_H
3
4#include "stat.h"
5#include "thread_options.h"
6#include "lib/ieee754.h"
7
8extern void steadystate_check(void);
9extern void steadystate_setup(void);
10extern int td_steadystate_init(struct thread_data *);
11extern uint64_t steadystate_bw_mean(struct thread_stat *);
12extern uint64_t steadystate_iops_mean(struct thread_stat *);
13
14extern bool steadystate_enabled;
15
16struct steadystate_data {
17	double limit;
18	unsigned long long dur;
19	unsigned long long ramp_time;
20
21	uint32_t state;
22
23	unsigned int head;
24	unsigned int tail;
25	uint64_t *iops_data;
26	uint64_t *bw_data;
27
28	double slope;
29	double deviation;
30	double criterion;
31
32	uint64_t sum_y;
33	uint64_t sum_x;
34	uint64_t sum_x_sq;
35	uint64_t sum_xy;
36	uint64_t oldest_y;
37
38	struct timeval prev_time;
39	uint64_t prev_iops;
40	uint64_t prev_bytes;
41};
42
43enum {
44	__FIO_SS_IOPS		= 1,
45	__FIO_SS_BW		= 2,
46	__FIO_SS_SLOPE		= 4,
47	__FIO_SS_ATTAINED	= 8,
48	__FIO_SS_RAMP_OVER	= 16,
49	__FIO_SS_DATA		= 32,
50	__FIO_SS_PCT		= 64,
51	__FIO_SS_BUFFER_FULL	= 128,
52
53	FIO_SS_IOPS		= __FIO_SS_IOPS,
54	FIO_SS_IOPS_SLOPE	= __FIO_SS_IOPS | __FIO_SS_SLOPE,
55	FIO_SS_BW		= __FIO_SS_BW,
56	FIO_SS_BW_SLOPE		= __FIO_SS_BW | __FIO_SS_SLOPE,
57};
58
59#define STEADYSTATE_MSEC	1000
60
61#endif
62