[fio.git] / diskutil.h

#ifndef FIO_DISKUTIL_H
#define FIO_DISKUTIL_H
#define FIO_DU_NAME_SZ		64

#include <limits.h>

#include "helper_thread.h"
#include "fio_sem.h"

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 utils as read in /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
Commit	Line	Data
	1	#ifndef FIO_DISKUTIL_H
	2	#define FIO_DISKUTIL_H
	3	#define FIO_DU_NAME_SZ 64
	4
	5	#include <limits.h>
	6
	7	#include "helper_thread.h"
	8	#include "fio_sem.h"
	9
	10	struct disk_util_stats {
	11	uint64_t ios[2];
	12	uint64_t merges[2];
	13	uint64_t sectors[2];
	14	uint64_t ticks[2];
	15	uint64_t io_ticks;
	16	uint64_t time_in_queue;
	17	uint64_t msec;
	18	};
	19
	20	/*
	21	* Disk utils as read in /sys/block/<dev>/stat
	22	*/
	23	struct disk_util_stat {
	24	uint8_t name[FIO_DU_NAME_SZ];
	25	struct disk_util_stats s;
	26	};
	27
	28	struct disk_util_agg {
	29	uint64_t ios[2];
	30	uint64_t merges[2];
	31	uint64_t sectors[2];
	32	uint64_t ticks[2];
	33	uint64_t io_ticks;
	34	uint64_t time_in_queue;
	35	uint32_t slavecount;
	36	uint32_t pad;
	37	fio_fp64_t max_util;
	38	};
	39
	40	/*
	41	* Per-device disk util management
	42	*/
	43	struct disk_util {
	44	struct flist_head list;
	45	/* If this disk is a slave, hook it into the master's
	46	* list using this head.
	47	*/
	48	struct flist_head slavelist;
	49
	50	char *sysfs_root;
	51	char path[PATH_MAX];
	52	int major, minor;
	53
	54	struct disk_util_stat dus;
	55	struct disk_util_stat last_dus;
	56
	57	struct disk_util_agg agg;
	58
	59	/* For software raids, this entry maintains pointers to the
	60	* entries for the slave devices. The disk_util entries for
	61	* the slaves devices should primarily be maintained through
	62	* the disk_list list, i.e. for memory allocation and
	63	* de-allocation, etc. Whereas this list should be used only
	64	* for aggregating a software RAID's disk util figures.
	65	*/
	66	struct flist_head slaves;
	67
	68	struct timespec time;
	69
	70	struct fio_sem *lock;
	71	unsigned long users;
	72	};
	73
	74	static inline void disk_util_mod(struct disk_util *du, int val)
	75	{
	76	if (du) {
	77	struct flist_head *n;
	78
	79	fio_sem_down(du->lock);
	80	du->users += val;
	81
	82	flist_for_each(n, &du->slavelist) {
	83	struct disk_util *slave;
	84
	85	slave = flist_entry(n, struct disk_util, slavelist);
	86	slave->users += val;
	87	}
	88	fio_sem_up(du->lock);
	89	}
	90	}
	91	static inline void disk_util_inc(struct disk_util *du)
	92	{
	93	disk_util_mod(du, 1);
	94	}
	95
	96	static inline void disk_util_dec(struct disk_util *du)
	97	{
	98	disk_util_mod(du, -1);
	99	}
	100
	101	#define DISK_UTIL_MSEC (250)
	102
	103	extern struct flist_head disk_list;
	104
	105	/*
	106	* disk util stuff
	107	*/
	108	#ifdef FIO_HAVE_DISK_UTIL
	109	extern void init_disk_util(struct thread_data *);
	110	extern int update_io_ticks(void);
	111	extern void setup_disk_util(void);
	112	extern void disk_util_prune_entries(void);
	113	#else
	114	/* keep this as a function to avoid a warning in handle_du() */
	115	#define disk_util_prune_entries()
	116	#define init_disk_util(td)
	117	#define setup_disk_util()
	118
	119	static inline int update_io_ticks(void)
	120	{
	121	return helper_should_exit();
	122	}
	123	#endif
	124
	125	#endif