1 #ifndef FIO_STEADYSTATE_H
2 #define FIO_STEADYSTATE_H
5 #include "thread_options.h"
6 #include "lib/ieee754.h"
8 extern void steadystate_check(void);
9 extern void steadystate_setup(void);
10 extern int td_steadystate_init(struct thread_data *);
11 extern unsigned long long steadystate_bw_mean(struct thread_stat *);
12 extern unsigned long long steadystate_iops_mean(struct thread_stat *);
14 extern bool steadystate_enabled;
16 struct steadystate_data {
18 unsigned long long dur;
19 unsigned long long ramp_time;
32 unsigned long long sum_y;
33 unsigned long long sum_x;
34 unsigned long long sum_x_sq;
35 unsigned long long sum_xy;
36 unsigned long long oldest_y;
38 struct timeval prev_time;
39 unsigned long long prev_iops;
40 unsigned long long prev_bytes;
47 __FIO_SS_ATTAINED = 8,
48 __FIO_SS_RAMP_OVER = 16,
51 __FIO_SS_BUFFER_FULL = 128,
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,
59 #define STEADYSTATE_MSEC 1000