[fio.git] / diskutil.h

#ifndef FIO_DISKUTIL_H
#define FIO_DISKUTIL_H
#define FIO_DU_NAME_SZ		64

#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
7c9b1bce JA	1	#ifndef FIO_DISKUTIL_H
7c9b1bce JA	2	#define FIO_DISKUTIL_H
d09a64a0 JA	3	#define FIO_DU_NAME_SZ 64
d09a64a0 JA	4
e2bb0e58	5	#include "helper_thread.h"
971caeb1	6	#include "fio_sem.h"
27357187	7
a3b4cf7d	8	struct disk_util_stats {
504bc961 JA	9	uint64_t ios[2];
504bc961 JA	10	uint64_t merges[2];
d09a64a0	11	uint64_t sectors[2];
504bc961 JA	12	uint64_t ticks[2];
	13	uint64_t io_ticks;
	14	uint64_t time_in_queue;
d09a64a0 JA	15	uint64_t msec;
	16	};
	17
a3b4cf7d JA	18	/*
	19	* Disk utils as read in /sys/block/<dev>/stat
	20	*/
	21	struct disk_util_stat {
	22	uint8_t name[FIO_DU_NAME_SZ];
	23	struct disk_util_stats s;
	24	};
	25
d09a64a0	26	struct disk_util_agg {
504bc961 JA	27	uint64_t ios[2];
504bc961 JA	28	uint64_t merges[2];
d09a64a0	29	uint64_t sectors[2];
504bc961 JA	30	uint64_t ticks[2];
	31	uint64_t io_ticks;
	32	uint64_t time_in_queue;
d09a64a0	33	uint32_t slavecount;
504bc961	34	uint32_t pad;
d09a64a0	35	fio_fp64_t max_util;
7c9b1bce JA	36	};
	37
	38	/*
	39	* Per-device disk util management
	40	*/
	41	struct disk_util {
	42	struct flist_head list;
	43	/* If this disk is a slave, hook it into the master's
	44	* list using this head.
	45	*/
	46	struct flist_head slavelist;
	47
7c9b1bce	48	char *sysfs_root;
4b919f77	49	char path[PATH_MAX];
7c9b1bce JA	50	int major, minor;
	51
	52	struct disk_util_stat dus;
	53	struct disk_util_stat last_dus;
	54
d09a64a0 JA	55	struct disk_util_agg agg;
d09a64a0 JA	56
7c9b1bce JA	57	/* For software raids, this entry maintains pointers to the
	58	* entries for the slave devices. The disk_util entries for
	59	* the slaves devices should primarily be maintained through
	60	* the disk_list list, i.e. for memory allocation and
	61	* de-allocation, etc. Whereas this list should be used only
	62	* for aggregating a software RAID's disk util figures.
	63	*/
	64	struct flist_head slaves;
	65
8b6a404c	66	struct timespec time;
7c9b1bce	67
971caeb1	68	struct fio_sem *lock;
7c9b1bce JA	69	unsigned long users;
	70	};
	71
e99ca81d	72	static inline void disk_util_mod(struct disk_util *du, int val)
7c9b1bce JA	73	{
7c9b1bce JA	74	if (du) {
e99ca81d JA	75	struct flist_head *n;
e99ca81d JA	76
971caeb1	77	fio_sem_down(du->lock);
e99ca81d JA	78	du->users += val;
	79
	80	flist_for_each(n, &du->slavelist) {
	81	struct disk_util *slave;
	82
	83	slave = flist_entry(n, struct disk_util, slavelist);
	84	slave->users += val;
	85	}
971caeb1	86	fio_sem_up(du->lock);
7c9b1bce JA	87	}
7c9b1bce JA	88	}
e99ca81d JA	89	static inline void disk_util_inc(struct disk_util *du)
	90	{
	91	disk_util_mod(du, 1);
	92	}
7c9b1bce JA	93
	94	static inline void disk_util_dec(struct disk_util *du)
	95	{
e99ca81d	96	disk_util_mod(du, -1);
7c9b1bce JA	97	}
	98
	99	#define DISK_UTIL_MSEC (250)
	100
d09a64a0 JA	101	extern struct flist_head disk_list;
d09a64a0 JA	102
7c9b1bce JA	103	/*
	104	* disk util stuff
	105	*/
	106	#ifdef FIO_HAVE_DISK_UTIL
7c9b1bce	107	extern void init_disk_util(struct thread_data *);
9ec7779f JA	108	extern int update_io_ticks(void);
9ec7779f JA	109	extern void setup_disk_util(void);
27357187	110	extern void disk_util_prune_entries(void);
7c9b1bce	111	#else
9aa6aa64	112	/* keep this as a function to avoid a warning in handle_du() */
27357187	113	#define disk_util_prune_entries()
7c9b1bce	114	#define init_disk_util(td)
9ec7779f	115	#define setup_disk_util()
952b05e0	116
9ec7779f JA	117	static inline int update_io_ticks(void)
9ec7779f JA	118	{
e2bb0e58	119	return helper_should_exit();
9ec7779f	120	}
7c9b1bce JA	121	#endif
	122
	123	#endif