3 #define FIO_DU_NAME_SZ 64
7 #include "helper_thread.h"
10 struct disk_util_stats {
16 uint64_t time_in_queue;
21 * Disk utils as read in /sys/block/<dev>/stat
23 struct disk_util_stat {
24 uint8_t name[FIO_DU_NAME_SZ];
25 struct disk_util_stats s;
28 struct disk_util_agg {
34 uint64_t time_in_queue;
41 * Per-device disk util management
44 struct flist_head list;
45 /* If this disk is a slave, hook it into the master's
46 * list using this head.
48 struct flist_head slavelist;
54 struct disk_util_stat dus;
55 struct disk_util_stat last_dus;
57 struct disk_util_agg agg;
59 /* For software raids, this entry maintains pointers to the
60 * entries for the slave devices. The disk_util entries for
61 * the slaves devices should primarily be maintained through
62 * the disk_list list, i.e. for memory allocation and
63 * de-allocation, etc. Whereas this list should be used only
64 * for aggregating a software RAID's disk util figures.
66 struct flist_head slaves;
74 static inline void disk_util_mod(struct disk_util *du, int val)
79 fio_sem_down(du->lock);
82 flist_for_each(n, &du->slavelist) {
83 struct disk_util *slave;
85 slave = flist_entry(n, struct disk_util, slavelist);
91 static inline void disk_util_inc(struct disk_util *du)
96 static inline void disk_util_dec(struct disk_util *du)
98 disk_util_mod(du, -1);
101 #define DISK_UTIL_MSEC (250)
103 extern struct flist_head disk_list;
108 #ifdef FIO_HAVE_DISK_UTIL
109 extern void init_disk_util(struct thread_data *);
110 extern int update_io_ticks(void);
111 extern void setup_disk_util(void);
112 extern void disk_util_prune_entries(void);
114 /* keep this as a function to avoid a warning in handle_du() */
115 #define disk_util_prune_entries()
116 #define init_disk_util(td)
117 #define setup_disk_util()
119 static inline int update_io_ticks(void)
121 return helper_should_exit();