3 #define FIO_DU_NAME_SZ 64
8 #include "helper_thread.h"
11 #include "lib/ieee754.h"
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.
21 * For the array members, index 0 refers to reads and index 1 refers to writes.
23 struct disk_util_stats {
29 uint64_t time_in_queue;
34 * Disk utilization as read from /sys/block/<dev>/stat
36 struct disk_util_stat {
37 uint8_t name[FIO_DU_NAME_SZ];
38 struct disk_util_stats s;
41 struct disk_util_agg {
47 uint64_t time_in_queue;
54 * Per-device disk util management
57 struct flist_head list;
58 /* If this disk is a slave, hook it into the master's
59 * list using this head.
61 struct flist_head slavelist;
67 struct disk_util_stat dus;
68 struct disk_util_stat last_dus;
70 struct disk_util_agg agg;
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.
79 struct flist_head slaves;
87 static inline void disk_util_mod(struct disk_util *du, int val)
92 fio_sem_down(du->lock);
95 flist_for_each(n, &du->slavelist) {
96 struct disk_util *slave;
98 slave = flist_entry(n, struct disk_util, slavelist);
101 fio_sem_up(du->lock);
104 static inline void disk_util_inc(struct disk_util *du)
106 disk_util_mod(du, 1);
109 static inline void disk_util_dec(struct disk_util *du)
111 disk_util_mod(du, -1);
114 #define DISK_UTIL_MSEC (250)
116 extern struct flist_head disk_list;
121 #ifdef FIO_HAVE_DISK_UTIL
122 extern void init_disk_util(struct thread_data *);
123 extern int update_io_ticks(void);
124 extern void setup_disk_util(void);
125 extern void disk_util_prune_entries(void);
127 /* keep this as a function to avoid a warning in handle_du() */
128 #define disk_util_prune_entries()
129 #define init_disk_util(td)
130 #define setup_disk_util()
132 static inline int update_io_ticks(void)
134 return helper_should_exit();