[fio.git] / rate-submit.c

/*
 * Rated submission helpers
 *
 * Copyright (C) 2015 Jens Axboe <axboe@kernel.dk>
 *
 */
#include "fio.h"
#include "ioengines.h"
#include "lib/getrusage.h"
#include "rate-submit.h"

static void check_overlap(struct io_u *io_u)
{
	int i;
	struct thread_data *td;
	bool overlap = false;

	do {
		/*
		 * Allow only one thread to check for overlap at a
		 * time to prevent two threads from thinking the coast
		 * is clear and then submitting IOs that overlap with
		 * each other
		 */
		pthread_mutex_lock(&overlap_check);
		for_each_td(td, i) {
			if (td->runstate <= TD_SETTING_UP ||
				td->runstate >= TD_FINISHING ||
				!td->o.serialize_overlap ||
				td->o.io_submit_mode != IO_MODE_OFFLOAD)
				continue;

			overlap = in_flight_overlap(&td->io_u_all, io_u);
			if (overlap) {
				pthread_mutex_unlock(&overlap_check);
				break;
			}
		}
	} while (overlap);
}

static int io_workqueue_fn(struct submit_worker *sw,
			   struct workqueue_work *work)
{
	struct io_u *io_u = container_of(work, struct io_u, work);
	const enum fio_ddir ddir = io_u->ddir;
	struct thread_data *td = sw->priv;
	int ret;

	if (td->o.serialize_overlap)
		check_overlap(io_u);

	dprint(FD_RATE, "io_u %p queued by %u\n", io_u, gettid());

	io_u_set(td, io_u, IO_U_F_NO_FILE_PUT);

	td->cur_depth++;

	do {
		ret = td_io_queue(td, io_u);
		if (ret != FIO_Q_BUSY)
			break;
		ret = io_u_queued_complete(td, 1);
		if (ret > 0)
			td->cur_depth -= ret;
		io_u_clear(td, io_u, IO_U_F_FLIGHT);
	} while (1);

	dprint(FD_RATE, "io_u %p ret %d by %u\n", io_u, ret, gettid());

	io_queue_event(td, io_u, &ret, ddir, NULL, 0, NULL);

	if (ret == FIO_Q_COMPLETED)
		td->cur_depth--;
	else if (ret == FIO_Q_QUEUED) {
		unsigned int min_evts;

		if (td->o.iodepth == 1)
			min_evts = 1;
		else
			min_evts = 0;

		ret = io_u_queued_complete(td, min_evts);
		if (ret > 0)
			td->cur_depth -= ret;
	} else if (ret == FIO_Q_BUSY) {
		ret = io_u_queued_complete(td, td->cur_depth);
		if (ret > 0)
			td->cur_depth -= ret;
	}

	return 0;
}

static bool io_workqueue_pre_sleep_flush_fn(struct submit_worker *sw)
{
	struct thread_data *td = sw->priv;

	if (td->io_u_queued || td->cur_depth || td->io_u_in_flight)
		return true;

	return false;
}

static void io_workqueue_pre_sleep_fn(struct submit_worker *sw)
{
	struct thread_data *td = sw->priv;
	int ret;

	ret = io_u_quiesce(td);
	if (ret > 0)
		td->cur_depth -= ret;
}

static int io_workqueue_alloc_fn(struct submit_worker *sw)
{
	struct thread_data *td;

	td = calloc(1, sizeof(*td));
	sw->priv = td;
	return 0;
}

static void io_workqueue_free_fn(struct submit_worker *sw)
{
	free(sw->priv);
	sw->priv = NULL;
}

static int io_workqueue_init_worker_fn(struct submit_worker *sw)
{
	struct thread_data *parent = sw->wq->td;
	struct thread_data *td = sw->priv;

	memcpy(&td->o, &parent->o, sizeof(td->o));
	memcpy(&td->ts, &parent->ts, sizeof(td->ts));
	td->o.uid = td->o.gid = -1U;
	dup_files(td, parent);
	td->eo = parent->eo;
	fio_options_mem_dupe(td);

	if (ioengine_load(td))
		goto err;

	td->pid = gettid();

	INIT_FLIST_HEAD(&td->io_log_list);
	INIT_FLIST_HEAD(&td->io_hist_list);
	INIT_FLIST_HEAD(&td->verify_list);
	INIT_FLIST_HEAD(&td->trim_list);
	td->io_hist_tree = RB_ROOT;

	td->o.iodepth = 1;
	if (td_io_init(td))
		goto err_io_init;

	set_epoch_time(td, td->o.log_unix_epoch);
	fio_getrusage(&td->ru_start);
	clear_io_state(td, 1);

	td_set_runstate(td, TD_RUNNING);
	td->flags |= TD_F_CHILD | TD_F_NEED_LOCK;
	td->parent = parent;
	return 0;

err_io_init:
	close_ioengine(td);
err:
	return 1;

}

static void io_workqueue_exit_worker_fn(struct submit_worker *sw,
					unsigned int *sum_cnt)
{
	struct thread_data *td = sw->priv;

	(*sum_cnt)++;
	sum_thread_stats(&sw->wq->td->ts, &td->ts, *sum_cnt == 1);

	fio_options_free(td);
	close_and_free_files(td);
	if (td->io_ops)
		close_ioengine(td);
	td_set_runstate(td, TD_EXITED);
}

#ifdef CONFIG_SFAA
static void sum_val(uint64_t *dst, uint64_t *src)
{
	if (*src) {
		__sync_fetch_and_add(dst, *src);
		*src = 0;
	}
}
#else
static void sum_val(uint64_t *dst, uint64_t *src)
{
	if (*src) {
		*dst += *src;
		*src = 0;
	}
}
#endif

static void pthread_double_unlock(pthread_mutex_t *lock1,
				  pthread_mutex_t *lock2)
{
#ifndef CONFIG_SFAA
	pthread_mutex_unlock(lock1);
	pthread_mutex_unlock(lock2);
#endif
}

static void pthread_double_lock(pthread_mutex_t *lock1, pthread_mutex_t *lock2)
{
#ifndef CONFIG_SFAA
	if (lock1 < lock2) {
		pthread_mutex_lock(lock1);
		pthread_mutex_lock(lock2);
	} else {
		pthread_mutex_lock(lock2);
		pthread_mutex_lock(lock1);
	}
#endif
}

static void sum_ddir(struct thread_data *dst, struct thread_data *src,
		     enum fio_ddir ddir)
{
	pthread_double_lock(&dst->io_wq.stat_lock, &src->io_wq.stat_lock);

	sum_val(&dst->io_bytes[ddir], &src->io_bytes[ddir]);
	sum_val(&dst->io_blocks[ddir], &src->io_blocks[ddir]);
	sum_val(&dst->this_io_blocks[ddir], &src->this_io_blocks[ddir]);
	sum_val(&dst->this_io_bytes[ddir], &src->this_io_bytes[ddir]);
	sum_val(&dst->bytes_done[ddir], &src->bytes_done[ddir]);

	pthread_double_unlock(&dst->io_wq.stat_lock, &src->io_wq.stat_lock);
}

static void io_workqueue_update_acct_fn(struct submit_worker *sw)
{
	struct thread_data *src = sw->priv;
	struct thread_data *dst = sw->wq->td;

	if (td_read(src))
		sum_ddir(dst, src, DDIR_READ);
	if (td_write(src))
		sum_ddir(dst, src, DDIR_WRITE);
	if (td_trim(src))
		sum_ddir(dst, src, DDIR_TRIM);

}

static struct workqueue_ops rated_wq_ops = {
	.fn			= io_workqueue_fn,
	.pre_sleep_flush_fn	= io_workqueue_pre_sleep_flush_fn,
	.pre_sleep_fn		= io_workqueue_pre_sleep_fn,
	.update_acct_fn		= io_workqueue_update_acct_fn,
	.alloc_worker_fn	= io_workqueue_alloc_fn,
	.free_worker_fn		= io_workqueue_free_fn,
	.init_worker_fn		= io_workqueue_init_worker_fn,
	.exit_worker_fn		= io_workqueue_exit_worker_fn,
};

int rate_submit_init(struct thread_data *td, struct sk_out *sk_out)
{
	if (td->o.io_submit_mode != IO_MODE_OFFLOAD)
		return 0;

	return workqueue_init(td, &td->io_wq, &rated_wq_ops, td->o.iodepth, sk_out);
}

void rate_submit_exit(struct thread_data *td)
{
	if (td->o.io_submit_mode != IO_MODE_OFFLOAD)
		return;

	workqueue_exit(&td->io_wq);
}
Commit	Line	Data
51575029 JA	1	/*
	2	* Rated submission helpers
	3	*
	4	* Copyright (C) 2015 Jens Axboe <axboe@kernel.dk>
	5	*
	6	*/
40511301	7	#include "fio.h"
618ee94c	8	#include "ioengines.h"
40511301	9	#include "lib/getrusage.h"
24660963	10	#include "rate-submit.h"
40511301	11
c06379a6 VF	12	static void check_overlap(struct io_u *io_u)
	13	{
	14	int i;
	15	struct thread_data *td;
	16	bool overlap = false;
	17
	18	do {
	19	/*
	20	* Allow only one thread to check for overlap at a
	21	* time to prevent two threads from thinking the coast
	22	* is clear and then submitting IOs that overlap with
	23	* each other
	24	*/
	25	pthread_mutex_lock(&overlap_check);
	26	for_each_td(td, i) {
	27	if (td->runstate <= TD_SETTING_UP \|\|
	28	td->runstate >= TD_FINISHING \|\|
	29	!td->o.serialize_overlap \|\|
	30	td->o.io_submit_mode != IO_MODE_OFFLOAD)
	31	continue;
	32
	33	overlap = in_flight_overlap(&td->io_u_all, io_u);
	34	if (overlap) {
	35	pthread_mutex_unlock(&overlap_check);
	36	break;
	37	}
	38	}
	39	} while (overlap);
	40	}
	41
155f2f02 JA	42	static int io_workqueue_fn(struct submit_worker *sw,
155f2f02 JA	43	struct workqueue_work *work)
40511301 JA	44	{
	45	struct io_u *io_u = container_of(work, struct io_u, work);
	46	const enum fio_ddir ddir = io_u->ddir;
b86ad8f1	47	struct thread_data *td = sw->priv;
40511301 JA	48	int ret;
40511301 JA	49
c06379a6 VF	50	if (td->o.serialize_overlap)
	51	check_overlap(io_u);
	52
40511301 JA	53	dprint(FD_RATE, "io_u %p queued by %u\n", io_u, gettid());
40511301 JA	54
1651e431	55	io_u_set(td, io_u, IO_U_F_NO_FILE_PUT);
40511301 JA	56
	57	td->cur_depth++;
	58
	59	do {
	60	ret = td_io_queue(td, io_u);
	61	if (ret != FIO_Q_BUSY)
	62	break;
	63	ret = io_u_queued_complete(td, 1);
	64	if (ret > 0)
	65	td->cur_depth -= ret;
1651e431	66	io_u_clear(td, io_u, IO_U_F_FLIGHT);
40511301 JA	67	} while (1);
	68
	69	dprint(FD_RATE, "io_u %p ret %d by %u\n", io_u, ret, gettid());
	70
	71	io_queue_event(td, io_u, &ret, ddir, NULL, 0, NULL);
	72
	73	if (ret == FIO_Q_COMPLETED)
	74	td->cur_depth--;
	75	else if (ret == FIO_Q_QUEUED) {
	76	unsigned int min_evts;
	77
	78	if (td->o.iodepth == 1)
	79	min_evts = 1;
	80	else
	81	min_evts = 0;
	82
	83	ret = io_u_queued_complete(td, min_evts);
	84	if (ret > 0)
	85	td->cur_depth -= ret;
	86	} else if (ret == FIO_Q_BUSY) {
	87	ret = io_u_queued_complete(td, td->cur_depth);
	88	if (ret > 0)
	89	td->cur_depth -= ret;
	90	}
155f2f02 JA	91
155f2f02 JA	92	return 0;
40511301 JA	93	}
	94
	95	static bool io_workqueue_pre_sleep_flush_fn(struct submit_worker *sw)
	96	{
b86ad8f1	97	struct thread_data *td = sw->priv;
40511301 JA	98
	99	if (td->io_u_queued \|\| td->cur_depth \|\| td->io_u_in_flight)
	100	return true;
	101
	102	return false;
	103	}
	104
	105	static void io_workqueue_pre_sleep_fn(struct submit_worker *sw)
	106	{
b86ad8f1	107	struct thread_data *td = sw->priv;
40511301 JA	108	int ret;
	109
	110	ret = io_u_quiesce(td);
	111	if (ret > 0)
	112	td->cur_depth -= ret;
	113	}
	114
	115	static int io_workqueue_alloc_fn(struct submit_worker *sw)
	116	{
	117	struct thread_data *td;
	118
	119	td = calloc(1, sizeof(*td));
b86ad8f1	120	sw->priv = td;
40511301 JA	121	return 0;
	122	}
	123
	124	static void io_workqueue_free_fn(struct submit_worker *sw)
	125	{
b86ad8f1 CB	126	free(sw->priv);
b86ad8f1 CB	127	sw->priv = NULL;
40511301 JA	128	}
	129
	130	static int io_workqueue_init_worker_fn(struct submit_worker *sw)
	131	{
	132	struct thread_data *parent = sw->wq->td;
b86ad8f1	133	struct thread_data *td = sw->priv;
40511301 JA	134
	135	memcpy(&td->o, &parent->o, sizeof(td->o));
	136	memcpy(&td->ts, &parent->ts, sizeof(td->ts));
	137	td->o.uid = td->o.gid = -1U;
	138	dup_files(td, parent);
	139	td->eo = parent->eo;
	140	fio_options_mem_dupe(td);
	141
	142	if (ioengine_load(td))
	143	goto err;
	144
40511301 JA	145	td->pid = gettid();
	146
	147	INIT_FLIST_HEAD(&td->io_log_list);
	148	INIT_FLIST_HEAD(&td->io_hist_list);
	149	INIT_FLIST_HEAD(&td->verify_list);
	150	INIT_FLIST_HEAD(&td->trim_list);
40511301 JA	151	td->io_hist_tree = RB_ROOT;
	152
	153	td->o.iodepth = 1;
	154	if (td_io_init(td))
	155	goto err_io_init;
	156
3aea75b1	157	set_epoch_time(td, td->o.log_unix_epoch);
40511301 JA	158	fio_getrusage(&td->ru_start);
	159	clear_io_state(td, 1);
	160
	161	td_set_runstate(td, TD_RUNNING);
b7aae4ba	162	td->flags \|= TD_F_CHILD \| TD_F_NEED_LOCK;
40511301 JA	163	td->parent = parent;
	164	return 0;
	165
	166	err_io_init:
	167	close_ioengine(td);
	168	err:
	169	return 1;
	170
	171	}
	172
	173	static void io_workqueue_exit_worker_fn(struct submit_worker *sw,
	174	unsigned int *sum_cnt)
	175	{
b86ad8f1	176	struct thread_data *td = sw->priv;
40511301 JA	177
	178	(*sum_cnt)++;
	179	sum_thread_stats(&sw->wq->td->ts, &td->ts, *sum_cnt == 1);
	180
	181	fio_options_free(td);
	182	close_and_free_files(td);
	183	if (td->io_ops)
	184	close_ioengine(td);
	185	td_set_runstate(td, TD_EXITED);
	186	}
	187
	188	#ifdef CONFIG_SFAA
	189	static void sum_val(uint64_t dst, uint64_t src)
	190	{
	191	if (*src) {
	192	__sync_fetch_and_add(dst, *src);
	193	*src = 0;
	194	}
	195	}
	196	#else
	197	static void sum_val(uint64_t dst, uint64_t src)
	198	{
	199	if (*src) {
	200	dst += src;
	201	*src = 0;
	202	}
	203	}
	204	#endif
	205
	206	static void pthread_double_unlock(pthread_mutex_t *lock1,
	207	pthread_mutex_t *lock2)
	208	{
	209	#ifndef CONFIG_SFAA
	210	pthread_mutex_unlock(lock1);
	211	pthread_mutex_unlock(lock2);
	212	#endif
	213	}
	214
	215	static void pthread_double_lock(pthread_mutex_t lock1, pthread_mutex_t lock2)
	216	{
	217	#ifndef CONFIG_SFAA
	218	if (lock1 < lock2) {
	219	pthread_mutex_lock(lock1);
	220	pthread_mutex_lock(lock2);
	221	} else {
	222	pthread_mutex_lock(lock2);
	223	pthread_mutex_lock(lock1);
	224	}
	225	#endif
	226	}
	227
	228	static void sum_ddir(struct thread_data dst, struct thread_data src,
	229	enum fio_ddir ddir)
	230	{
	231	pthread_double_lock(&dst->io_wq.stat_lock, &src->io_wq.stat_lock);
	232
	233	sum_val(&dst->io_bytes[ddir], &src->io_bytes[ddir]);
	234	sum_val(&dst->io_blocks[ddir], &src->io_blocks[ddir]);
	235	sum_val(&dst->this_io_blocks[ddir], &src->this_io_blocks[ddir]);
	236	sum_val(&dst->this_io_bytes[ddir], &src->this_io_bytes[ddir]);
	237	sum_val(&dst->bytes_done[ddir], &src->bytes_done[ddir]);
	238
	239	pthread_double_unlock(&dst->io_wq.stat_lock, &src->io_wq.stat_lock);
	240	}
241
242	static void io_workqueue_update_acct_fn(struct submit_worker *sw)
243	{
b86ad8f1	244	struct thread_data *src = sw->priv;
40511301 JA	245	struct thread_data *dst = sw->wq->td;
	246
	247	if (td_read(src))
	248	sum_ddir(dst, src, DDIR_READ);
	249	if (td_write(src))
	250	sum_ddir(dst, src, DDIR_WRITE);
	251	if (td_trim(src))
	252	sum_ddir(dst, src, DDIR_TRIM);
	253
	254	}
	255
103b174e	256	static struct workqueue_ops rated_wq_ops = {
40511301 JA	257	.fn = io_workqueue_fn,
	258	.pre_sleep_flush_fn = io_workqueue_pre_sleep_flush_fn,
	259	.pre_sleep_fn = io_workqueue_pre_sleep_fn,
	260	.update_acct_fn = io_workqueue_update_acct_fn,
	261	.alloc_worker_fn = io_workqueue_alloc_fn,
	262	.free_worker_fn = io_workqueue_free_fn,
	263	.init_worker_fn = io_workqueue_init_worker_fn,
	264	.exit_worker_fn = io_workqueue_exit_worker_fn,
	265	};
103b174e	266
24660963	267	int rate_submit_init(struct thread_data td, struct sk_out sk_out)
103b174e JA	268	{
	269	if (td->o.io_submit_mode != IO_MODE_OFFLOAD)
	270	return 0;
	271
24660963	272	return workqueue_init(td, &td->io_wq, &rated_wq_ops, td->o.iodepth, sk_out);
103b174e JA	273	}
	274
	275	void rate_submit_exit(struct thread_data *td)
	276	{
	277	if (td->o.io_submit_mode != IO_MODE_OFFLOAD)
	278	return;
	279
	280	workqueue_exit(&td->io_wq);
	281	}