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#ifndef FIO_DISKUTIL_H
#define FIO_DISKUTIL_H
/*
* Disk utils as read in /sys/block/<dev>/stat
*/
struct disk_util_stat {
unsigned ios[2];
unsigned merges[2];
unsigned long long sectors[2];
unsigned ticks[2];
unsigned io_ticks;
unsigned time_in_queue;
};
/*
* Per-device disk util management
*/
struct disk_util {
struct flist_head list;
/* If this disk is a slave, hook it into the master's
* list using this head.
*/
struct flist_head slavelist;
char *name;
char *sysfs_root;
char path[256];
int major, minor;
struct disk_util_stat dus;
struct disk_util_stat last_dus;
/* For software raids, this entry maintains pointers to the
* entries for the slave devices. The disk_util entries for
* the slaves devices should primarily be maintained through
* the disk_list list, i.e. for memory allocation and
* de-allocation, etc. Whereas this list should be used only
* for aggregating a software RAID's disk util figures.
*/
struct flist_head slaves;
unsigned long msec;
struct timeval time;
struct fio_mutex *lock;
unsigned long users;
};
static inline void disk_util_mod(struct disk_util *du, int val)
{
if (du) {
struct flist_head *n;
fio_mutex_down(du->lock);
du->users += val;
flist_for_each(n, &du->slavelist) {
struct disk_util *slave;
slave = flist_entry(n, struct disk_util, slavelist);
slave->users += val;
}
fio_mutex_up(du->lock);
}
}
static inline void disk_util_inc(struct disk_util *du)
{
disk_util_mod(du, 1);
}
static inline void disk_util_dec(struct disk_util *du)
{
disk_util_mod(du, -1);
}
#define DISK_UTIL_MSEC (250)
/*
* disk util stuff
*/
#ifdef FIO_HAVE_DISK_UTIL
extern void show_disk_util(void);
extern void init_disk_util(struct thread_data *);
extern void update_io_ticks(void);
#else
#define show_disk_util()
#define init_disk_util(td)
#define update_io_ticks()
#endif
#endif
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