[fio.git] / diskutil.h

#ifndef FIO_DISKUTIL_H
#define FIO_DISKUTIL_H
#include "json.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 print_disk_util(struct disk_util_stat *, struct disk_util_agg *, int terse, struct buf_output *);
extern void show_disk_util(int terse, struct json_object *parent, struct buf_output *);
extern void json_array_add_disk_util(struct disk_util_stat *dus,
		struct disk_util_agg *agg, struct json_array *parent);
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() */
static inline void print_disk_util(struct disk_util_stat *du,
				   struct disk_util_agg *agg, int terse,
				   struct buf_output *out)
{
}
#define show_disk_util(terse, parent, out)
#define disk_util_prune_entries()
#define init_disk_util(td)
#define setup_disk_util()
#define json_array_add_disk_util(dus, agg, parent)

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	#include "json.h"
	4	#define FIO_DU_NAME_SZ 64
	5
	6	#include "helper_thread.h"
	7	#include "fio_sem.h"
	8
	9	struct disk_util_stats {
	10	uint64_t ios[2];
	11	uint64_t merges[2];
	12	uint64_t sectors[2];
	13	uint64_t ticks[2];
	14	uint64_t io_ticks;
	15	uint64_t time_in_queue;
	16	uint64_t msec;
	17	};
	18
	19	/*
	20	* Disk utils as read in /sys/block/<dev>/stat
	21	*/
	22	struct disk_util_stat {
	23	uint8_t name[FIO_DU_NAME_SZ];
	24	struct disk_util_stats s;
	25	};
	26
	27	struct disk_util_agg {
	28	uint64_t ios[2];
	29	uint64_t merges[2];
	30	uint64_t sectors[2];
	31	uint64_t ticks[2];
	32	uint64_t io_ticks;
	33	uint64_t time_in_queue;
	34	uint32_t slavecount;
	35	uint32_t pad;
	36	fio_fp64_t max_util;
	37	};
	38
	39	/*
	40	* Per-device disk util management
	41	*/
	42	struct disk_util {
	43	struct flist_head list;
	44	/* If this disk is a slave, hook it into the master's
	45	* list using this head.
	46	*/
	47	struct flist_head slavelist;
	48
	49	char *sysfs_root;
	50	char path[PATH_MAX];
	51	int major, minor;
	52
	53	struct disk_util_stat dus;
	54	struct disk_util_stat last_dus;
	55
	56	struct disk_util_agg agg;
	57
	58	/* For software raids, this entry maintains pointers to the
	59	* entries for the slave devices. The disk_util entries for
	60	* the slaves devices should primarily be maintained through
	61	* the disk_list list, i.e. for memory allocation and
	62	* de-allocation, etc. Whereas this list should be used only
	63	* for aggregating a software RAID's disk util figures.
	64	*/
	65	struct flist_head slaves;
	66
	67	struct timespec time;
	68
	69	struct fio_sem *lock;
	70	unsigned long users;
	71	};
	72
	73	static inline void disk_util_mod(struct disk_util *du, int val)
	74	{
	75	if (du) {
	76	struct flist_head *n;
	77
	78	fio_sem_down(du->lock);
	79	du->users += val;
	80
	81	flist_for_each(n, &du->slavelist) {
	82	struct disk_util *slave;
	83
	84	slave = flist_entry(n, struct disk_util, slavelist);
	85	slave->users += val;
	86	}
	87	fio_sem_up(du->lock);
	88	}
	89	}
	90	static inline void disk_util_inc(struct disk_util *du)
	91	{
	92	disk_util_mod(du, 1);
	93	}
	94
	95	static inline void disk_util_dec(struct disk_util *du)
	96	{
	97	disk_util_mod(du, -1);
	98	}
	99
	100	#define DISK_UTIL_MSEC (250)
	101
	102	extern struct flist_head disk_list;
	103
	104	/*
	105	* disk util stuff
	106	*/
	107	#ifdef FIO_HAVE_DISK_UTIL
	108	extern void print_disk_util(struct disk_util_stat , struct disk_util_agg , int terse, struct buf_output *);
	109	extern void show_disk_util(int terse, struct json_object parent, struct buf_output );
	110	extern void json_array_add_disk_util(struct disk_util_stat *dus,
	111	struct disk_util_agg agg, struct json_array parent);
	112	extern void init_disk_util(struct thread_data *);
	113	extern int update_io_ticks(void);
	114	extern void setup_disk_util(void);
	115	extern void disk_util_prune_entries(void);
	116	#else
	117	/* keep this as a function to avoid a warning in handle_du() */
	118	static inline void print_disk_util(struct disk_util_stat *du,
	119	struct disk_util_agg *agg, int terse,
	120	struct buf_output *out)
	121	{
	122	}
	123	#define show_disk_util(terse, parent, out)
	124	#define disk_util_prune_entries()
	125	#define init_disk_util(td)
	126	#define setup_disk_util()
	127	#define json_array_add_disk_util(dus, agg, parent)
	128
	129	static inline int update_io_ticks(void)
	130	{
	131	return helper_should_exit();
	132	}
	133	#endif
	134
	135	#endif