[fio.git] / diskutil.h

#ifndef FIO_DISKUTIL_H
#define FIO_DISKUTIL_H

#define FIO_DU_NAME_SZ		64

/*
 * Disk utils as read in /sys/block/<dev>/stat
 */
struct disk_util_stat {
	uint8_t name[FIO_DU_NAME_SZ];
	uint32_t ios[2];
	uint32_t merges[2];
	uint64_t sectors[2];
	uint32_t ticks[2];
	uint32_t io_ticks;
	uint32_t time_in_queue;
	uint64_t msec;
};

struct disk_util_agg {
	uint32_t ios[2];
	uint32_t merges[2];
	uint64_t sectors[2];
	uint32_t ticks[2];
	uint32_t io_ticks;
	uint32_t time_in_queue;
	uint32_t slavecount;
	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 *name;
	char *sysfs_root;
	char path[256];
	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 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)

extern struct flist_head disk_list;

/*
 * disk util stuff
 */
#ifdef FIO_HAVE_DISK_UTIL
extern void print_disk_util(struct disk_util_stat *, struct disk_util_agg *, int terse);
extern void show_disk_util(int terse);
extern void free_disk_util(void);
extern void init_disk_util(struct thread_data *);
extern void update_io_ticks(void);
#else
#define print_disk_util(dus, agg, terse)
#define show_disk_util(terse)
#define free_disk_util()
#define init_disk_util(td)
#define update_io_ticks()
#endif

#endif
Commit	Line	Data
7c9b1bce JA	1	#ifndef FIO_DISKUTIL_H
	2	#define FIO_DISKUTIL_H
	3
d09a64a0 JA	4	#define FIO_DU_NAME_SZ 64
d09a64a0 JA	5
7c9b1bce JA	6	/*
	7	* Disk utils as read in /sys/block/<dev>/stat
	8	*/
	9	struct disk_util_stat {
d09a64a0 JA	10	uint8_t name[FIO_DU_NAME_SZ];
	11	uint32_t ios[2];
	12	uint32_t merges[2];
	13	uint64_t sectors[2];
	14	uint32_t ticks[2];
	15	uint32_t io_ticks;
	16	uint32_t time_in_queue;
	17	uint64_t msec;
	18	};
	19
	20	struct disk_util_agg {
	21	uint32_t ios[2];
	22	uint32_t merges[2];
	23	uint64_t sectors[2];
	24	uint32_t ticks[2];
	25	uint32_t io_ticks;
	26	uint32_t time_in_queue;
	27	uint32_t slavecount;
	28	fio_fp64_t max_util;
7c9b1bce JA	29	};
	30
	31	/*
	32	* Per-device disk util management
	33	*/
	34	struct disk_util {
	35	struct flist_head list;
	36	/* If this disk is a slave, hook it into the master's
	37	* list using this head.
	38	*/
	39	struct flist_head slavelist;
	40
	41	char *name;
	42	char *sysfs_root;
	43	char path[256];
	44	int major, minor;
	45
	46	struct disk_util_stat dus;
	47	struct disk_util_stat last_dus;
	48
d09a64a0 JA	49	struct disk_util_agg agg;
d09a64a0 JA	50
7c9b1bce JA	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.
	57	*/
	58	struct flist_head slaves;
	59
7c9b1bce JA	60	struct timeval time;
	61
	62	struct fio_mutex *lock;
	63	unsigned long users;
	64	};
	65
e99ca81d	66	static inline void disk_util_mod(struct disk_util *du, int val)
7c9b1bce JA	67	{
7c9b1bce JA	68	if (du) {
e99ca81d JA	69	struct flist_head *n;
e99ca81d JA	70
7c9b1bce	71	fio_mutex_down(du->lock);
e99ca81d JA	72	du->users += val;
	73
	74	flist_for_each(n, &du->slavelist) {
	75	struct disk_util *slave;
	76
	77	slave = flist_entry(n, struct disk_util, slavelist);
	78	slave->users += val;
	79	}
7c9b1bce JA	80	fio_mutex_up(du->lock);
	81	}
	82	}
e99ca81d JA	83	static inline void disk_util_inc(struct disk_util *du)
	84	{
	85	disk_util_mod(du, 1);
	86	}
7c9b1bce JA	87
	88	static inline void disk_util_dec(struct disk_util *du)
	89	{
e99ca81d	90	disk_util_mod(du, -1);
7c9b1bce JA	91	}
	92
	93	#define DISK_UTIL_MSEC (250)
	94
d09a64a0 JA	95	extern struct flist_head disk_list;
d09a64a0 JA	96
7c9b1bce JA	97	/*
	98	* disk util stuff
	99	*/
	100	#ifdef FIO_HAVE_DISK_UTIL
f2f788dd JA	101	extern void print_disk_util(struct disk_util_stat , struct disk_util_agg , int terse);
f2f788dd JA	102	extern void show_disk_util(int terse);
d09a64a0	103	extern void free_disk_util(void);
7c9b1bce JA	104	extern void init_disk_util(struct thread_data *);
	105	extern void update_io_ticks(void);
	106	#else
f2f788dd JA	107	#define print_disk_util(dus, agg, terse)
f2f788dd JA	108	#define show_disk_util(terse)
d09a64a0	109	#define free_disk_util()
7c9b1bce JA	110	#define init_disk_util(td)
	111	#define update_io_ticks()
	112	#endif
	113
	114	#endif