[fio.git] / engines / fio-engine-libaio.c

/*
 * native linux aio io engine
 *
 */
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <assert.h>
#include "fio.h"
#include "os.h"

#ifdef FIO_HAVE_LIBAIO

#define ev_to_iou(ev)	(struct io_u *) ((unsigned long) (ev)->obj)

struct libaio_data {
	io_context_t aio_ctx;
	struct io_event *aio_events;
};

static int fio_libaio_prep(struct thread_data fio_unused *td, struct io_u *io_u)
{
	struct fio_file *f = io_u->file;

	if (io_u->ddir == DDIR_READ)
		io_prep_pread(&io_u->iocb, f->fd, io_u->buf, io_u->buflen, io_u->offset);
	else if (io_u->ddir == DDIR_WRITE)
		io_prep_pwrite(&io_u->iocb, f->fd, io_u->buf, io_u->buflen, io_u->offset);
	else if (io_u->ddir == DDIR_SYNC)
		io_prep_fsync(&io_u->iocb, f->fd);
	else
		return 1;

	return 0;
}

static struct io_u *fio_libaio_event(struct thread_data *td, int event)
{
	struct libaio_data *ld = td->io_ops->data;

	return ev_to_iou(ld->aio_events + event);
}

static int fio_libaio_getevents(struct thread_data *td, int min, int max,
				struct timespec *t)
{
	struct libaio_data *ld = td->io_ops->data;
	long r;

	do {
		r = io_getevents(ld->aio_ctx, min, max, ld->aio_events, t);
		if (r == -EAGAIN) {
			usleep(100);
			continue;
		} else if (r == -EINTR)
			continue;
		else if (r != 0)
			break;
	} while (1);

	if (r < 0)
		r = -r;

	return (int) r;
}

static int fio_libaio_queue(struct thread_data *td, struct io_u *io_u)
{
	struct libaio_data *ld = td->io_ops->data;
	struct iocb *iocb = &io_u->iocb;
	long ret;

	do {
		ret = io_submit(ld->aio_ctx, 1, &iocb);
		if (ret == 1)
			return 0;
		else if (ret == -EAGAIN || !ret)
			usleep(100);
		else if (ret == -EINTR)
			continue;
		else
			break;
	} while (1);

	if (ret <= 0) {
		io_u->resid = io_u->buflen;
		io_u->error = -ret;
		return 1;
	}

	return 0;
}

static int fio_libaio_cancel(struct thread_data *td, struct io_u *io_u)
{
	struct libaio_data *ld = td->io_ops->data;

	return io_cancel(ld->aio_ctx, &io_u->iocb, ld->aio_events);
}

static void fio_libaio_cleanup(struct thread_data *td)
{
	struct libaio_data *ld = td->io_ops->data;

	if (ld) {
		io_destroy(ld->aio_ctx);
		if (ld->aio_events)
			free(ld->aio_events);

		free(ld);
		td->io_ops->data = NULL;
	}
}

static int fio_libaio_init(struct thread_data *td)
{
	struct libaio_data *ld = malloc(sizeof(*ld));

	memset(ld, 0, sizeof(*ld));
	if (io_queue_init(td->iodepth, &ld->aio_ctx)) {
		td_verror(td, errno);
		return 1;
	}

	ld->aio_events = malloc(td->iodepth * sizeof(struct io_event));
	memset(ld->aio_events, 0, td->iodepth * sizeof(struct io_event));
	td->io_ops->data = ld;
	return 0;
}

struct ioengine_ops ioengine = {
	.name		= "libaio",
	.version	= FIO_IOOPS_VERSION,
	.init		= fio_libaio_init,
	.prep		= fio_libaio_prep,
	.queue		= fio_libaio_queue,
	.cancel		= fio_libaio_cancel,
	.getevents	= fio_libaio_getevents,
	.event		= fio_libaio_event,
	.cleanup	= fio_libaio_cleanup,
};

#else /* FIO_HAVE_LIBAIO */

/*
 * When we have a proper configure system in place, we simply wont build
 * and install this io engine. For now install a crippled version that
 * just complains and fails to load.
 */
static int fio_libaio_init(struct thread_data fio_unused *td)
{
	fprintf(stderr, "fio: libaio not available\n");
	return 1;
}

struct ioengine_ops ioengine = {
	.name		= "libaio",
	.version	= FIO_IOOPS_VERSION,
	.init		= fio_libaio_init,
};

#endif
Commit	Line	Data
2866c82d JA	1	/*
	2	* native linux aio io engine
	3	*
	4	*/
	5	#include <stdio.h>
	6	#include <stdlib.h>
	7	#include <unistd.h>
	8	#include <errno.h>
	9	#include <assert.h>
	10	#include "fio.h"
	11	#include "os.h"
	12
34cfcdaf JA	13	#ifdef FIO_HAVE_LIBAIO
34cfcdaf JA	14
2866c82d JA	15	#define ev_to_iou(ev) (struct io_u *) ((unsigned long) (ev)->obj)
	16
	17	struct libaio_data {
	18	io_context_t aio_ctx;
	19	struct io_event *aio_events;
	20	};
	21
7a16dd02	22	static int fio_libaio_prep(struct thread_data fio_unused td, struct io_u io_u)
2866c82d	23	{
53cdc686 JA	24	struct fio_file *f = io_u->file;
53cdc686 JA	25
2866c82d	26	if (io_u->ddir == DDIR_READ)
53cdc686	27	io_prep_pread(&io_u->iocb, f->fd, io_u->buf, io_u->buflen, io_u->offset);
87dc1ab1	28	else if (io_u->ddir == DDIR_WRITE)
53cdc686	29	io_prep_pwrite(&io_u->iocb, f->fd, io_u->buf, io_u->buflen, io_u->offset);
87dc1ab1 JA	30	else if (io_u->ddir == DDIR_SYNC)
	31	io_prep_fsync(&io_u->iocb, f->fd);
	32	else
	33	return 1;
2866c82d JA	34
	35	return 0;
	36	}
	37
	38	static struct io_u fio_libaio_event(struct thread_data td, int event)
	39	{
	40	struct libaio_data *ld = td->io_ops->data;
	41
	42	return ev_to_iou(ld->aio_events + event);
	43	}
	44
	45	static int fio_libaio_getevents(struct thread_data *td, int min, int max,
	46	struct timespec *t)
	47	{
	48	struct libaio_data *ld = td->io_ops->data;
	49	long r;
	50
	51	do {
	52	r = io_getevents(ld->aio_ctx, min, max, ld->aio_events, t);
	53	if (r == -EAGAIN) {
	54	usleep(100);
	55	continue;
	56	} else if (r == -EINTR)
	57	continue;
84585003	58	else if (r != 0)
2866c82d JA	59	break;
	60	} while (1);
	61
eaf09db4 JA	62	if (r < 0)
	63	r = -r;
	64
	65	return (int) r;
2866c82d JA	66	}
	67
	68	static int fio_libaio_queue(struct thread_data td, struct io_u io_u)
	69	{
	70	struct libaio_data *ld = td->io_ops->data;
	71	struct iocb *iocb = &io_u->iocb;
	72	long ret;
	73
	74	do {
	75	ret = io_submit(ld->aio_ctx, 1, &iocb);
	76	if (ret == 1)
	77	return 0;
84585003	78	else if (ret == -EAGAIN \|\| !ret)
2866c82d JA	79	usleep(100);
	80	else if (ret == -EINTR)
	81	continue;
	82	else
	83	break;
	84	} while (1);
	85
353a7e0e JA	86	if (ret <= 0) {
	87	io_u->resid = io_u->buflen;
	88	io_u->error = -ret;
	89	return 1;
	90	}
2866c82d	91
353a7e0e	92	return 0;
2866c82d JA	93	}
	94
	95	static int fio_libaio_cancel(struct thread_data td, struct io_u io_u)
	96	{
	97	struct libaio_data *ld = td->io_ops->data;
	98
	99	return io_cancel(ld->aio_ctx, &io_u->iocb, ld->aio_events);
	100	}
	101
	102	static void fio_libaio_cleanup(struct thread_data *td)
	103	{
	104	struct libaio_data *ld = td->io_ops->data;
	105
	106	if (ld) {
	107	io_destroy(ld->aio_ctx);
	108	if (ld->aio_events)
	109	free(ld->aio_events);
	110
	111	free(ld);
	112	td->io_ops->data = NULL;
	113	}
	114	}
	115
	116	static int fio_libaio_init(struct thread_data *td)
	117	{
	118	struct libaio_data ld = malloc(sizeof(ld));
	119
	120	memset(ld, 0, sizeof(*ld));
	121	if (io_queue_init(td->iodepth, &ld->aio_ctx)) {
	122	td_verror(td, errno);
	123	return 1;
	124	}
	125
	126	ld->aio_events = malloc(td->iodepth * sizeof(struct io_event));
84585003	127	memset(ld->aio_events, 0, td->iodepth * sizeof(struct io_event));
2866c82d JA	128	td->io_ops->data = ld;
	129	return 0;
	130	}
	131
	132	struct ioengine_ops ioengine = {
	133	.name = "libaio",
	134	.version = FIO_IOOPS_VERSION,
	135	.init = fio_libaio_init,
	136	.prep = fio_libaio_prep,
	137	.queue = fio_libaio_queue,
	138	.cancel = fio_libaio_cancel,
	139	.getevents = fio_libaio_getevents,
	140	.event = fio_libaio_event,
	141	.cleanup = fio_libaio_cleanup,
2866c82d	142	};
34cfcdaf JA	143
	144	#else /* FIO_HAVE_LIBAIO */
	145
	146	/*
	147	* When we have a proper configure system in place, we simply wont build
	148	* and install this io engine. For now install a crippled version that
	149	* just complains and fails to load.
	150	*/
	151	static int fio_libaio_init(struct thread_data fio_unused *td)
	152	{
	153	fprintf(stderr, "fio: libaio not available\n");
	154	return 1;
	155	}
	156
	157	struct ioengine_ops ioengine = {
	158	.name = "libaio",
	159	.version = FIO_IOOPS_VERSION,
	160	.init = fio_libaio_init,
	161	};
	162
	163	#endif