blob: e5c6204351db00304db32fa376837faa9c420cc9 [file] [log] [blame]
/*
* 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
*
* If an overlap is found, release the lock and
* re-acquire it before checking again to give other
* threads a chance to make progress
*
* If an overlap is not found, release the lock when the
* io_u's IO_U_F_FLIGHT flag is set so that this io_u
* can be checked by other threads as they assess overlap
*/
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;
}
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);
}