[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
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
6a16e9e9 JA	5	#include <limits.h>
6a16e9e9 JA	6
e2bb0e58	7	#include "helper_thread.h"
971caeb1	8	#include "fio_sem.h"
27357187	9
a3b4cf7d	10	struct disk_util_stats {
504bc961 JA	11	uint64_t ios[2];
504bc961 JA	12	uint64_t merges[2];
d09a64a0	13	uint64_t sectors[2];
504bc961 JA	14	uint64_t ticks[2];
	15	uint64_t io_ticks;
	16	uint64_t time_in_queue;
d09a64a0 JA	17	uint64_t msec;
	18	};
	19
a3b4cf7d JA	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
d09a64a0	28	struct disk_util_agg {
504bc961 JA	29	uint64_t ios[2];
504bc961 JA	30	uint64_t merges[2];
d09a64a0	31	uint64_t sectors[2];
504bc961 JA	32	uint64_t ticks[2];
	33	uint64_t io_ticks;
	34	uint64_t time_in_queue;
d09a64a0	35	uint32_t slavecount;
504bc961	36	uint32_t pad;
d09a64a0	37	fio_fp64_t max_util;
7c9b1bce JA	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
7c9b1bce	50	char *sysfs_root;
4b919f77	51	char path[PATH_MAX];
7c9b1bce JA	52	int major, minor;
	53
	54	struct disk_util_stat dus;
	55	struct disk_util_stat last_dus;
	56
d09a64a0 JA	57	struct disk_util_agg agg;
d09a64a0 JA	58
7c9b1bce JA	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
8b6a404c	68	struct timespec time;
7c9b1bce	69
971caeb1	70	struct fio_sem *lock;
7c9b1bce JA	71	unsigned long users;
	72	};
	73
e99ca81d	74	static inline void disk_util_mod(struct disk_util *du, int val)
7c9b1bce JA	75	{
7c9b1bce JA	76	if (du) {
e99ca81d JA	77	struct flist_head *n;
e99ca81d JA	78
971caeb1	79	fio_sem_down(du->lock);
e99ca81d JA	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	}
971caeb1	88	fio_sem_up(du->lock);
7c9b1bce JA	89	}
7c9b1bce JA	90	}
e99ca81d JA	91	static inline void disk_util_inc(struct disk_util *du)
	92	{
	93	disk_util_mod(du, 1);
	94	}
7c9b1bce JA	95
	96	static inline void disk_util_dec(struct disk_util *du)
	97	{
e99ca81d	98	disk_util_mod(du, -1);
7c9b1bce JA	99	}
	100
	101	#define DISK_UTIL_MSEC (250)
	102
d09a64a0 JA	103	extern struct flist_head disk_list;
d09a64a0 JA	104
7c9b1bce JA	105	/*
	106	* disk util stuff
	107	*/
	108	#ifdef FIO_HAVE_DISK_UTIL
7c9b1bce	109	extern void init_disk_util(struct thread_data *);
9ec7779f JA	110	extern int update_io_ticks(void);
9ec7779f JA	111	extern void setup_disk_util(void);
27357187	112	extern void disk_util_prune_entries(void);
7c9b1bce	113	#else
9aa6aa64	114	/* keep this as a function to avoid a warning in handle_du() */
27357187	115	#define disk_util_prune_entries()
7c9b1bce	116	#define init_disk_util(td)
9ec7779f	117	#define setup_disk_util()
952b05e0	118
9ec7779f JA	119	static inline int update_io_ticks(void)
9ec7779f JA	120	{
e2bb0e58	121	return helper_should_exit();
9ec7779f	122	}
7c9b1bce JA	123	#endif
	124
	125	#endif