[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"

/**
 * @ios: Number of I/O operations that have been completed successfully.
 * @merges: Number of I/O operations that have been merged.
 * @sectors: I/O size in 512-byte units.
 * @ticks: Time spent on I/O in milliseconds.
 * @io_ticks: CPU time spent on I/O in milliseconds.
 * @time_in_queue: Weighted time spent doing I/O in milliseconds.
 *
 * For the array members, index 0 refers to reads and index 1 refers to writes.
 */
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 utilization as read from /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
a9d83cff BVA	10	/**
	11	* @ios: Number of I/O operations that have been completed successfully.
	12	* @merges: Number of I/O operations that have been merged.
	13	* @sectors: I/O size in 512-byte units.
	14	* @ticks: Time spent on I/O in milliseconds.
	15	* @io_ticks: CPU time spent on I/O in milliseconds.
	16	* @time_in_queue: Weighted time spent doing I/O in milliseconds.
	17	*
	18	* For the array members, index 0 refers to reads and index 1 refers to writes.
	19	*/
a3b4cf7d	20	struct disk_util_stats {
504bc961 JA	21	uint64_t ios[2];
504bc961 JA	22	uint64_t merges[2];
d09a64a0	23	uint64_t sectors[2];
504bc961 JA	24	uint64_t ticks[2];
	25	uint64_t io_ticks;
	26	uint64_t time_in_queue;
d09a64a0 JA	27	uint64_t msec;
	28	};
	29
a3b4cf7d	30	/*
a9d83cff	31	* Disk utilization as read from /sys/block/<dev>/stat
a3b4cf7d JA	32	*/
	33	struct disk_util_stat {
	34	uint8_t name[FIO_DU_NAME_SZ];
	35	struct disk_util_stats s;
	36	};
	37
d09a64a0	38	struct disk_util_agg {
504bc961 JA	39	uint64_t ios[2];
504bc961 JA	40	uint64_t merges[2];
d09a64a0	41	uint64_t sectors[2];
504bc961 JA	42	uint64_t ticks[2];
	43	uint64_t io_ticks;
	44	uint64_t time_in_queue;
d09a64a0	45	uint32_t slavecount;
504bc961	46	uint32_t pad;
d09a64a0	47	fio_fp64_t max_util;
7c9b1bce JA	48	};
	49
	50	/*
	51	* Per-device disk util management
	52	*/
	53	struct disk_util {
	54	struct flist_head list;
	55	/* If this disk is a slave, hook it into the master's
	56	* list using this head.
	57	*/
	58	struct flist_head slavelist;
	59
7c9b1bce	60	char *sysfs_root;
4b919f77	61	char path[PATH_MAX];
7c9b1bce JA	62	int major, minor;
	63
	64	struct disk_util_stat dus;
	65	struct disk_util_stat last_dus;
	66
d09a64a0 JA	67	struct disk_util_agg agg;
d09a64a0 JA	68
7c9b1bce JA	69	/* For software raids, this entry maintains pointers to the
	70	* entries for the slave devices. The disk_util entries for
	71	* the slaves devices should primarily be maintained through
	72	* the disk_list list, i.e. for memory allocation and
	73	* de-allocation, etc. Whereas this list should be used only
	74	* for aggregating a software RAID's disk util figures.
	75	*/
	76	struct flist_head slaves;
	77
8b6a404c	78	struct timespec time;
7c9b1bce	79
971caeb1	80	struct fio_sem *lock;
7c9b1bce JA	81	unsigned long users;
	82	};
	83
e99ca81d	84	static inline void disk_util_mod(struct disk_util *du, int val)
7c9b1bce JA	85	{
7c9b1bce JA	86	if (du) {
e99ca81d JA	87	struct flist_head *n;
e99ca81d JA	88
971caeb1	89	fio_sem_down(du->lock);
e99ca81d JA	90	du->users += val;
	91
	92	flist_for_each(n, &du->slavelist) {
	93	struct disk_util *slave;
	94
	95	slave = flist_entry(n, struct disk_util, slavelist);
	96	slave->users += val;
	97	}
971caeb1	98	fio_sem_up(du->lock);
7c9b1bce JA	99	}
7c9b1bce JA	100	}
e99ca81d JA	101	static inline void disk_util_inc(struct disk_util *du)
	102	{
	103	disk_util_mod(du, 1);
	104	}
7c9b1bce JA	105
	106	static inline void disk_util_dec(struct disk_util *du)
	107	{
e99ca81d	108	disk_util_mod(du, -1);
7c9b1bce JA	109	}
	110
	111	#define DISK_UTIL_MSEC (250)
	112
d09a64a0 JA	113	extern struct flist_head disk_list;
d09a64a0 JA	114
7c9b1bce JA	115	/*
	116	* disk util stuff
	117	*/
	118	#ifdef FIO_HAVE_DISK_UTIL
7c9b1bce	119	extern void init_disk_util(struct thread_data *);
9ec7779f JA	120	extern int update_io_ticks(void);
9ec7779f JA	121	extern void setup_disk_util(void);
27357187	122	extern void disk_util_prune_entries(void);
7c9b1bce	123	#else
9aa6aa64	124	/* keep this as a function to avoid a warning in handle_du() */
27357187	125	#define disk_util_prune_entries()
7c9b1bce	126	#define init_disk_util(td)
9ec7779f	127	#define setup_disk_util()
952b05e0	128
9ec7779f JA	129	static inline int update_io_ticks(void)
9ec7779f JA	130	{
e2bb0e58	131	return helper_should_exit();
9ec7779f	132	}
7c9b1bce JA	133	#endif
	134
	135	#endif