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7c9b1bce JA |
1 | #ifndef FIO_DISKUTIL_H |
2 | #define FIO_DISKUTIL_H | |
3 | ||
4 | /* | |
5 | * Disk utils as read in /sys/block/<dev>/stat | |
6 | */ | |
7 | struct disk_util_stat { | |
8 | unsigned ios[2]; | |
9 | unsigned merges[2]; | |
10 | unsigned long long sectors[2]; | |
11 | unsigned ticks[2]; | |
12 | unsigned io_ticks; | |
13 | unsigned time_in_queue; | |
14 | }; | |
15 | ||
16 | /* | |
17 | * Per-device disk util management | |
18 | */ | |
19 | struct disk_util { | |
20 | struct flist_head list; | |
21 | /* If this disk is a slave, hook it into the master's | |
22 | * list using this head. | |
23 | */ | |
24 | struct flist_head slavelist; | |
25 | ||
26 | char *name; | |
27 | char *sysfs_root; | |
28 | char path[256]; | |
29 | int major, minor; | |
30 | ||
31 | struct disk_util_stat dus; | |
32 | struct disk_util_stat last_dus; | |
33 | ||
34 | /* For software raids, this entry maintains pointers to the | |
35 | * entries for the slave devices. The disk_util entries for | |
36 | * the slaves devices should primarily be maintained through | |
37 | * the disk_list list, i.e. for memory allocation and | |
38 | * de-allocation, etc. Whereas this list should be used only | |
39 | * for aggregating a software RAID's disk util figures. | |
40 | */ | |
41 | struct flist_head slaves; | |
42 | ||
43 | unsigned long msec; | |
44 | struct timeval time; | |
45 | ||
46 | struct fio_mutex *lock; | |
47 | unsigned long users; | |
48 | }; | |
49 | ||
e99ca81d | 50 | static inline void disk_util_mod(struct disk_util *du, int val) |
7c9b1bce JA |
51 | { |
52 | if (du) { | |
e99ca81d JA |
53 | struct flist_head *n; |
54 | ||
7c9b1bce | 55 | fio_mutex_down(du->lock); |
e99ca81d JA |
56 | du->users += val; |
57 | ||
58 | flist_for_each(n, &du->slavelist) { | |
59 | struct disk_util *slave; | |
60 | ||
61 | slave = flist_entry(n, struct disk_util, slavelist); | |
62 | slave->users += val; | |
63 | } | |
7c9b1bce JA |
64 | fio_mutex_up(du->lock); |
65 | } | |
66 | } | |
e99ca81d JA |
67 | static inline void disk_util_inc(struct disk_util *du) |
68 | { | |
69 | disk_util_mod(du, 1); | |
70 | } | |
7c9b1bce JA |
71 | |
72 | static inline void disk_util_dec(struct disk_util *du) | |
73 | { | |
e99ca81d | 74 | disk_util_mod(du, -1); |
7c9b1bce JA |
75 | } |
76 | ||
77 | #define DISK_UTIL_MSEC (250) | |
78 | ||
79 | /* | |
80 | * disk util stuff | |
81 | */ | |
82 | #ifdef FIO_HAVE_DISK_UTIL | |
83 | extern void show_disk_util(void); | |
84 | extern void init_disk_util(struct thread_data *); | |
85 | extern void update_io_ticks(void); | |
86 | #else | |
87 | #define show_disk_util() | |
88 | #define init_disk_util(td) | |
89 | #define update_io_ticks() | |
90 | #endif | |
91 | ||
92 | #endif |