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7c9b1bce JA |
1 | #ifndef FIO_DISKUTIL_H |
2 | #define FIO_DISKUTIL_H | |
d09a64a0 JA |
3 | #define FIO_DU_NAME_SZ 64 |
4 | ||
b49eb715 | 5 | #include <stdint.h> |
6a16e9e9 JA |
6 | #include <limits.h> |
7 | ||
e2bb0e58 | 8 | #include "helper_thread.h" |
971caeb1 | 9 | #include "fio_sem.h" |
b49eb715 DP |
10 | #include "flist.h" |
11 | #include "lib/ieee754.h" | |
27357187 | 12 | |
a9d83cff BVA |
13 | /** |
14 | * @ios: Number of I/O operations that have been completed successfully. | |
15 | * @merges: Number of I/O operations that have been merged. | |
16 | * @sectors: I/O size in 512-byte units. | |
17 | * @ticks: Time spent on I/O in milliseconds. | |
18 | * @io_ticks: CPU time spent on I/O in milliseconds. | |
19 | * @time_in_queue: Weighted time spent doing I/O in milliseconds. | |
20 | * | |
21 | * For the array members, index 0 refers to reads and index 1 refers to writes. | |
22 | */ | |
a3b4cf7d | 23 | struct disk_util_stats { |
504bc961 JA |
24 | uint64_t ios[2]; |
25 | uint64_t merges[2]; | |
d09a64a0 | 26 | uint64_t sectors[2]; |
504bc961 JA |
27 | uint64_t ticks[2]; |
28 | uint64_t io_ticks; | |
29 | uint64_t time_in_queue; | |
d09a64a0 JA |
30 | uint64_t msec; |
31 | }; | |
32 | ||
a3b4cf7d | 33 | /* |
a9d83cff | 34 | * Disk utilization as read from /sys/block/<dev>/stat |
a3b4cf7d JA |
35 | */ |
36 | struct disk_util_stat { | |
37 | uint8_t name[FIO_DU_NAME_SZ]; | |
38 | struct disk_util_stats s; | |
39 | }; | |
40 | ||
d09a64a0 | 41 | struct disk_util_agg { |
504bc961 JA |
42 | uint64_t ios[2]; |
43 | uint64_t merges[2]; | |
d09a64a0 | 44 | uint64_t sectors[2]; |
504bc961 JA |
45 | uint64_t ticks[2]; |
46 | uint64_t io_ticks; | |
47 | uint64_t time_in_queue; | |
d09a64a0 | 48 | uint32_t slavecount; |
504bc961 | 49 | uint32_t pad; |
d09a64a0 | 50 | fio_fp64_t max_util; |
7c9b1bce JA |
51 | }; |
52 | ||
53 | /* | |
54 | * Per-device disk util management | |
55 | */ | |
56 | struct disk_util { | |
57 | struct flist_head list; | |
58 | /* If this disk is a slave, hook it into the master's | |
59 | * list using this head. | |
60 | */ | |
61 | struct flist_head slavelist; | |
62 | ||
7c9b1bce | 63 | char *sysfs_root; |
4b919f77 | 64 | char path[PATH_MAX]; |
7c9b1bce JA |
65 | int major, minor; |
66 | ||
67 | struct disk_util_stat dus; | |
68 | struct disk_util_stat last_dus; | |
69 | ||
d09a64a0 JA |
70 | struct disk_util_agg agg; |
71 | ||
7c9b1bce JA |
72 | /* For software raids, this entry maintains pointers to the |
73 | * entries for the slave devices. The disk_util entries for | |
74 | * the slaves devices should primarily be maintained through | |
75 | * the disk_list list, i.e. for memory allocation and | |
76 | * de-allocation, etc. Whereas this list should be used only | |
77 | * for aggregating a software RAID's disk util figures. | |
78 | */ | |
79 | struct flist_head slaves; | |
80 | ||
8b6a404c | 81 | struct timespec time; |
7c9b1bce | 82 | |
971caeb1 | 83 | struct fio_sem *lock; |
7c9b1bce JA |
84 | unsigned long users; |
85 | }; | |
86 | ||
e99ca81d | 87 | static inline void disk_util_mod(struct disk_util *du, int val) |
7c9b1bce JA |
88 | { |
89 | if (du) { | |
e99ca81d JA |
90 | struct flist_head *n; |
91 | ||
971caeb1 | 92 | fio_sem_down(du->lock); |
e99ca81d JA |
93 | du->users += val; |
94 | ||
95 | flist_for_each(n, &du->slavelist) { | |
96 | struct disk_util *slave; | |
97 | ||
98 | slave = flist_entry(n, struct disk_util, slavelist); | |
99 | slave->users += val; | |
100 | } | |
971caeb1 | 101 | fio_sem_up(du->lock); |
7c9b1bce JA |
102 | } |
103 | } | |
e99ca81d JA |
104 | static inline void disk_util_inc(struct disk_util *du) |
105 | { | |
106 | disk_util_mod(du, 1); | |
107 | } | |
7c9b1bce JA |
108 | |
109 | static inline void disk_util_dec(struct disk_util *du) | |
110 | { | |
e99ca81d | 111 | disk_util_mod(du, -1); |
7c9b1bce JA |
112 | } |
113 | ||
114 | #define DISK_UTIL_MSEC (250) | |
115 | ||
d09a64a0 JA |
116 | extern struct flist_head disk_list; |
117 | ||
7c9b1bce JA |
118 | /* |
119 | * disk util stuff | |
120 | */ | |
121 | #ifdef FIO_HAVE_DISK_UTIL | |
7c9b1bce | 122 | extern void init_disk_util(struct thread_data *); |
9ec7779f JA |
123 | extern int update_io_ticks(void); |
124 | extern void setup_disk_util(void); | |
27357187 | 125 | extern void disk_util_prune_entries(void); |
7c9b1bce | 126 | #else |
9aa6aa64 | 127 | /* keep this as a function to avoid a warning in handle_du() */ |
27357187 | 128 | #define disk_util_prune_entries() |
7c9b1bce | 129 | #define init_disk_util(td) |
9ec7779f | 130 | #define setup_disk_util() |
952b05e0 | 131 | |
9ec7779f JA |
132 | static inline int update_io_ticks(void) |
133 | { | |
e2bb0e58 | 134 | return helper_should_exit(); |
9ec7779f | 135 | } |
7c9b1bce JA |
136 | #endif |
137 | ||
138 | #endif |