4 #define FIO_DU_NAME_SZ 64
6 #include "lib/output_buffer.h"
8 extern volatile int helper_exit;
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;
55 struct disk_util_stat dus;
56 struct disk_util_stat last_dus;
58 struct disk_util_agg agg;
60 /* For software raids, this entry maintains pointers to the
61 * entries for the slave devices. The disk_util entries for
62 * the slaves devices should primarily be maintained through
63 * the disk_list list, i.e. for memory allocation and
64 * de-allocation, etc. Whereas this list should be used only
65 * for aggregating a software RAID's disk util figures.
67 struct flist_head slaves;
71 struct fio_mutex *lock;
75 static inline void disk_util_mod(struct disk_util *du, int val)
80 fio_mutex_down(du->lock);
83 flist_for_each(n, &du->slavelist) {
84 struct disk_util *slave;
86 slave = flist_entry(n, struct disk_util, slavelist);
89 fio_mutex_up(du->lock);
92 static inline void disk_util_inc(struct disk_util *du)
97 static inline void disk_util_dec(struct disk_util *du)
99 disk_util_mod(du, -1);
102 #define DISK_UTIL_MSEC (250)
104 extern struct flist_head disk_list;
109 #ifdef FIO_HAVE_DISK_UTIL
110 extern void print_disk_util(struct disk_util_stat *, struct disk_util_agg *, int terse, struct buf_output *);
111 extern void show_disk_util(int terse, struct json_object *parent, struct buf_output *);
112 extern void json_array_add_disk_util(struct disk_util_stat *dus,
113 struct disk_util_agg *agg, struct json_array *parent);
114 extern void init_disk_util(struct thread_data *);
115 extern int update_io_ticks(void);
116 extern void setup_disk_util(void);
117 extern void disk_util_prune_entries(void);
119 static inline void print_disk_util(struct disk_util_stat *du,
120 struct disk_util_agg *agg, int terse,
121 struct buf_output *out)
124 #define show_disk_util(terse, parent, out)
125 #define disk_util_prune_entries()
126 #define init_disk_util(td)
127 #define setup_disk_util()
128 #define json_array_add_disk_util(dus, agg, parent)
130 static inline int update_io_ticks(void)