3 #define FIO_DU_NAME_SZ 64
5 #include "helper_thread.h"
8 struct disk_util_stats {
14 uint64_t time_in_queue;
19 * Disk utils as read in /sys/block/<dev>/stat
21 struct disk_util_stat {
22 uint8_t name[FIO_DU_NAME_SZ];
23 struct disk_util_stats s;
26 struct disk_util_agg {
32 uint64_t time_in_queue;
39 * Per-device disk util management
42 struct flist_head list;
43 /* If this disk is a slave, hook it into the master's
44 * list using this head.
46 struct flist_head slavelist;
52 struct disk_util_stat dus;
53 struct disk_util_stat last_dus;
55 struct disk_util_agg agg;
57 /* For software raids, this entry maintains pointers to the
58 * entries for the slave devices. The disk_util entries for
59 * the slaves devices should primarily be maintained through
60 * the disk_list list, i.e. for memory allocation and
61 * de-allocation, etc. Whereas this list should be used only
62 * for aggregating a software RAID's disk util figures.
64 struct flist_head slaves;
72 static inline void disk_util_mod(struct disk_util *du, int val)
77 fio_sem_down(du->lock);
80 flist_for_each(n, &du->slavelist) {
81 struct disk_util *slave;
83 slave = flist_entry(n, struct disk_util, slavelist);
89 static inline void disk_util_inc(struct disk_util *du)
94 static inline void disk_util_dec(struct disk_util *du)
96 disk_util_mod(du, -1);
99 #define DISK_UTIL_MSEC (250)
101 extern struct flist_head disk_list;
106 #ifdef FIO_HAVE_DISK_UTIL
107 extern void init_disk_util(struct thread_data *);
108 extern int update_io_ticks(void);
109 extern void setup_disk_util(void);
110 extern void disk_util_prune_entries(void);
112 /* keep this as a function to avoid a warning in handle_du() */
113 #define disk_util_prune_entries()
114 #define init_disk_util(td)
115 #define setup_disk_util()
117 static inline int update_io_ticks(void)
119 return helper_should_exit();