1 #ifndef FIO_STEADYSTATE_H
2 #define FIO_STEADYSTATE_H
4 #include "thread_options.h"
6 extern void steadystate_check(void);
7 extern void steadystate_setup(void);
8 extern int td_steadystate_init(struct thread_data *);
9 extern unsigned long long steadystate_bw_mean(struct steadystate_data *);
10 extern unsigned long long steadystate_iops_mean(struct steadystate_data *);
12 extern bool steadystate_enabled;
15 * For steady state detection
17 struct steadystate_data {
19 unsigned long long dur;
20 unsigned long long ramp_time;
26 unsigned long *iops_data;
27 unsigned long *bw_data;
33 unsigned long long sum_y;
34 unsigned long long sum_x;
35 unsigned long long sum_x_sq;
36 unsigned long long sum_xy;
37 unsigned long long oldest_y;
39 struct timeval prev_time;
40 unsigned long long prev_iops;
41 unsigned long long prev_bytes;
48 __FIO_SS_ATTAINED = 8,
49 __FIO_SS_RAMP_OVER = 16,
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