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#ifndef FIO_DISKUTIL_H
#define FIO_DISKUTIL_H
#define FIO_DU_NAME_SZ 64
#include <stdint.h>
#include <limits.h>
#include "helper_thread.h"
#include "fio_sem.h"
#include "flist.h"
#include "lib/ieee754.h"
/**
* @ios: Number of I/O operations that have been completed successfully.
* @merges: Number of I/O operations that have been merged.
* @sectors: I/O size in 512-byte units.
* @ticks: Time spent on I/O in milliseconds.
* @io_ticks: CPU time spent on I/O in milliseconds.
* @time_in_queue: Weighted time spent doing I/O in milliseconds.
*
* For the array members, index 0 refers to reads and index 1 refers to writes.
*/
struct disk_util_stats {
uint64_t ios[2];
uint64_t merges[2];
uint64_t sectors[2];
uint64_t ticks[2];
uint64_t io_ticks;
uint64_t time_in_queue;
uint64_t msec;
};
/*
* Disk utilization as read from /sys/block/<dev>/stat
*/
struct disk_util_stat {
uint8_t name[FIO_DU_NAME_SZ];
struct disk_util_stats s;
};
struct disk_util_agg {
uint64_t ios[2];
uint64_t merges[2];
uint64_t sectors[2];
uint64_t ticks[2];
uint64_t io_ticks;
uint64_t time_in_queue;
uint32_t slavecount;
uint32_t pad;
fio_fp64_t max_util;
};
/*
* 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 *sysfs_root;
char path[PATH_MAX];
int major, minor;
struct disk_util_stat dus;
struct disk_util_stat last_dus;
struct disk_util_agg agg;
/* 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;
struct timespec time;
struct fio_sem *lock;
unsigned long users;
};
static inline void disk_util_mod(struct disk_util *du, int val)
{
if (du) {
struct flist_head *n;
fio_sem_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_sem_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)
extern struct flist_head disk_list;
/*
* disk util stuff
*/
#ifdef FIO_HAVE_DISK_UTIL
extern void init_disk_util(struct thread_data *);
extern int update_io_ticks(void);
extern void setup_disk_util(void);
extern void disk_util_prune_entries(void);
#else
/* keep this as a function to avoid a warning in handle_du() */
#define disk_util_prune_entries()
#define init_disk_util(td)
#define setup_disk_util()
static inline int update_io_ticks(void)
{
return helper_should_exit();
}
#endif
#endif
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