4 #define FIO_DU_NAME_SZ 64
6 #include "helper_thread.h"
9 struct disk_util_stats {
15 uint64_t time_in_queue;
20 * Disk utils as read in /sys/block/<dev>/stat
22 struct disk_util_stat {
23 uint8_t name[FIO_DU_NAME_SZ];
24 struct disk_util_stats s;
27 struct disk_util_agg {
33 uint64_t time_in_queue;
40 * Per-device disk util management
43 struct flist_head list;
44 /* If this disk is a slave, hook it into the master's
45 * list using this head.
47 struct flist_head slavelist;
53 struct disk_util_stat dus;
54 struct disk_util_stat last_dus;
56 struct disk_util_agg agg;
58 /* For software raids, this entry maintains pointers to the
59 * entries for the slave devices. The disk_util entries for
60 * the slaves devices should primarily be maintained through
61 * the disk_list list, i.e. for memory allocation and
62 * de-allocation, etc. Whereas this list should be used only
63 * for aggregating a software RAID's disk util figures.
65 struct flist_head slaves;
73 static inline void disk_util_mod(struct disk_util *du, int val)
78 fio_sem_down(du->lock);
81 flist_for_each(n, &du->slavelist) {
82 struct disk_util *slave;
84 slave = flist_entry(n, struct disk_util, slavelist);
90 static inline void disk_util_inc(struct disk_util *du)
95 static inline void disk_util_dec(struct disk_util *du)
97 disk_util_mod(du, -1);
100 #define DISK_UTIL_MSEC (250)
102 extern struct flist_head disk_list;
107 #ifdef FIO_HAVE_DISK_UTIL
108 extern void print_disk_util(struct disk_util_stat *, struct disk_util_agg *, int terse, struct buf_output *);
109 extern void show_disk_util(int terse, struct json_object *parent, struct buf_output *);
110 extern void json_array_add_disk_util(struct disk_util_stat *dus,
111 struct disk_util_agg *agg, struct json_array *parent);
112 extern void init_disk_util(struct thread_data *);
113 extern int update_io_ticks(void);
114 extern void setup_disk_util(void);
115 extern void disk_util_prune_entries(void);
117 /* keep this as a function to avoid a warning in handle_du() */
118 static inline void print_disk_util(struct disk_util_stat *du,
119 struct disk_util_agg *agg, int terse,
120 struct buf_output *out)
123 #define show_disk_util(terse, parent, out)
124 #define disk_util_prune_entries()
125 #define init_disk_util(td)
126 #define setup_disk_util()
127 #define json_array_add_disk_util(dus, agg, parent)
129 static inline int update_io_ticks(void)
131 return helper_should_exit();