4 #define FIO_DU_NAME_SZ 64
6 extern volatile int disk_util_exit;
8 struct disk_util_stats {
14 uint32_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 uint32_t time_in_queue;
38 * Per-device disk util management
41 struct flist_head list;
42 /* If this disk is a slave, hook it into the master's
43 * list using this head.
45 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;
68 struct fio_mutex *lock;
72 static inline void disk_util_mod(struct disk_util *du, int val)
77 fio_mutex_down(du->lock);
80 flist_for_each(n, &du->slavelist) {
81 struct disk_util *slave;
83 slave = flist_entry(n, struct disk_util, slavelist);
86 fio_mutex_up(du->lock);
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;
103 extern void wait_for_disk_thread_exit(void);
108 #ifdef FIO_HAVE_DISK_UTIL
109 extern void print_disk_util(struct disk_util_stat *, struct disk_util_agg *, int terse);
110 extern void show_disk_util(int terse, struct json_object *parent);
111 extern void json_array_add_disk_util(struct disk_util_stat *dus,
112 struct disk_util_agg *agg, struct json_array *parent);
113 extern void init_disk_util(struct thread_data *);
114 extern int update_io_ticks(void);
115 extern void setup_disk_util(void);
116 extern void disk_util_prune_entries(void);
118 static inline void print_disk_util(struct disk_util_stat *du,
119 struct disk_util_agg *agg, int terse)
122 #define show_disk_util(terse, parent)
123 #define disk_util_prune_entries()
124 #define init_disk_util(td)
125 #define setup_disk_util()
126 #define json_array_add_disk_util(dus, agg, parent)
128 static inline int update_io_ticks(void)
130 return disk_util_exit;
134 static inline void disk_util_start_exit(void)