| 1 | #ifndef FIO_STEADYSTATE_H |
| 2 | #define FIO_STEADYSTATE_H |
| 3 | |
| 4 | #include "thread_options.h" |
| 5 | |
| 6 | extern void steadystate_check(void); |
| 7 | extern void steadystate_setup(void); |
| 8 | extern void steadystate_alloc(struct thread_data *); |
| 9 | |
| 10 | extern bool steadystate_enabled; |
| 11 | |
| 12 | /* |
| 13 | * For steady state detection |
| 14 | */ |
| 15 | struct steadystate_data { |
| 16 | double limit; |
| 17 | unsigned long long dur; |
| 18 | unsigned long long ramp_time; |
| 19 | bool check_iops; |
| 20 | bool check_slope; |
| 21 | bool pct; |
| 22 | |
| 23 | int attained; |
| 24 | int last_in_group; |
| 25 | int ramp_time_over; |
| 26 | |
| 27 | unsigned int head; |
| 28 | unsigned int tail; |
| 29 | unsigned long *iops_data; |
| 30 | unsigned long *bw_data; |
| 31 | |
| 32 | double slope; |
| 33 | double criterion; |
| 34 | double deviation; |
| 35 | |
| 36 | unsigned long long sum_y; |
| 37 | unsigned long long sum_x; |
| 38 | unsigned long long sum_x_sq; |
| 39 | unsigned long long sum_xy; |
| 40 | unsigned long long oldest_y; |
| 41 | |
| 42 | struct timeval prev_time; |
| 43 | unsigned long long prev_iops; |
| 44 | unsigned long long prev_bytes; |
| 45 | }; |
| 46 | |
| 47 | enum { |
| 48 | FIO_STEADYSTATE_IOPS = 0, |
| 49 | FIO_STEADYSTATE_IOPS_SLOPE, |
| 50 | FIO_STEADYSTATE_BW, |
| 51 | FIO_STEADYSTATE_BW_SLOPE, |
| 52 | }; |
| 53 | |
| 54 | #define STEADYSTATE_MSEC 1000 |
| 55 | |
| 56 | static inline bool steadystate_check_slope(struct thread_options *o) |
| 57 | { |
| 58 | return o->ss == FIO_STEADYSTATE_IOPS_SLOPE || |
| 59 | o->ss == FIO_STEADYSTATE_BW_SLOPE; |
| 60 | } |
| 61 | |
| 62 | static inline bool steadystate_check_iops(struct thread_options *o) |
| 63 | { |
| 64 | return o->ss == FIO_STEADYSTATE_IOPS || |
| 65 | o->ss == FIO_STEADYSTATE_IOPS_SLOPE; |
| 66 | } |
| 67 | |
| 68 | #endif |