4 #define FIO_DU_NAME_SZ 64
7 * Disk utils as read in /sys/block/<dev>/stat
9 struct disk_util_stat {
10 uint8_t name[FIO_DU_NAME_SZ];
16 uint32_t time_in_queue;
20 struct disk_util_agg {
26 uint32_t time_in_queue;
32 * Per-device disk util management
35 struct flist_head list;
36 /* If this disk is a slave, hook it into the master's
37 * list using this head.
39 struct flist_head slavelist;
46 struct disk_util_stat dus;
47 struct disk_util_stat last_dus;
49 struct disk_util_agg agg;
51 /* For software raids, this entry maintains pointers to the
52 * entries for the slave devices. The disk_util entries for
53 * the slaves devices should primarily be maintained through
54 * the disk_list list, i.e. for memory allocation and
55 * de-allocation, etc. Whereas this list should be used only
56 * for aggregating a software RAID's disk util figures.
58 struct flist_head slaves;
62 struct fio_mutex *lock;
66 static inline void disk_util_mod(struct disk_util *du, int val)
71 fio_mutex_down(du->lock);
74 flist_for_each(n, &du->slavelist) {
75 struct disk_util *slave;
77 slave = flist_entry(n, struct disk_util, slavelist);
80 fio_mutex_up(du->lock);
83 static inline void disk_util_inc(struct disk_util *du)
88 static inline void disk_util_dec(struct disk_util *du)
90 disk_util_mod(du, -1);
93 #define DISK_UTIL_MSEC (250)
95 extern struct flist_head disk_list;
100 #ifdef FIO_HAVE_DISK_UTIL
101 extern void print_disk_util(struct disk_util_stat *, struct disk_util_agg *, int terse);
102 extern void show_disk_util(int terse);
103 extern void free_disk_util(void);
104 extern void init_disk_util(struct thread_data *);
105 extern void update_io_ticks(void);
107 #define print_disk_util(dus, agg, terse)
108 #define show_disk_util(terse)
109 #define free_disk_util()
110 #define init_disk_util(td)
111 #define update_io_ticks()