+/*
+ * Rated submission helpers
+ *
+ * Copyright (C) 2015 Jens Axboe <axboe@kernel.dk>
+ *
+ */
#include "fio.h"
-#include "ioengine.h"
+#include "ioengines.h"
#include "lib/getrusage.h"
+#include "rate-submit.h"
-static void io_workqueue_fn(struct submit_worker *sw,
- struct workqueue_work *work)
+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->private;
- int ret;
+ struct thread_data *td = sw->priv;
+ int ret, error;
+
+ 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(io_u, IO_U_F_NO_FILE_PUT);
+ io_u_set(td, io_u, IO_U_F_NO_FILE_PUT);
td->cur_depth++;
ret = io_u_queued_complete(td, 1);
if (ret > 0)
td->cur_depth -= ret;
- io_u_clear(io_u, IO_U_F_FLIGHT);
+ else if (ret < 0)
+ break;
+ 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);
+ error = io_queue_event(td, io_u, &ret, ddir, NULL, 0, NULL);
if (ret == FIO_Q_COMPLETED)
td->cur_depth--;
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;
}
+
+ if (error || td->error)
+ pthread_cond_signal(&td->parent->free_cond);
+
+ return 0;
}
static bool io_workqueue_pre_sleep_flush_fn(struct submit_worker *sw)
{
- struct thread_data *td = sw->private;
+ struct thread_data *td = sw->priv;
+ if (td->error)
+ return false;
if (td->io_u_queued || td->cur_depth || td->io_u_in_flight)
return true;
static void io_workqueue_pre_sleep_fn(struct submit_worker *sw)
{
- struct thread_data *td = sw->private;
+ struct thread_data *td = sw->priv;
int ret;
ret = io_u_quiesce(td);
struct thread_data *td;
td = calloc(1, sizeof(*td));
- sw->private = td;
+ sw->priv = td;
return 0;
}
static void io_workqueue_free_fn(struct submit_worker *sw)
{
- free(sw->private);
- sw->private = NULL;
+ 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->private;
- int fio_unused ret;
+ struct thread_data *td = sw->priv;
memcpy(&td->o, &parent->o, sizeof(td->o));
memcpy(&td->ts, &parent->ts, sizeof(td->ts));
if (ioengine_load(td))
goto err;
- if (td->o.odirect)
- td->io_ops->flags |= FIO_RAWIO;
-
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);
- INIT_FLIST_HEAD(&td->next_rand_list);
td->io_hist_tree = RB_ROOT;
td->o.iodepth = 1;
if (td_io_init(td))
goto err_io_init;
- fio_gettime(&td->epoch, NULL);
+ if (td->io_ops->post_init && td->io_ops->post_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->flags |= TD_F_CHILD | TD_F_NEED_LOCK;
td->parent = parent;
return 0;
static void io_workqueue_exit_worker_fn(struct submit_worker *sw,
unsigned int *sum_cnt)
{
- struct thread_data *td = sw->private;
+ struct thread_data *td = sw->priv;
(*sum_cnt)++;
sum_thread_stats(&sw->wq->td->ts, &td->ts, *sum_cnt == 1);
static void io_workqueue_update_acct_fn(struct submit_worker *sw)
{
- struct thread_data *src = sw->private;
+ struct thread_data *src = sw->priv;
struct thread_data *dst = sw->wq->td;
if (td_read(src))
}
-struct workqueue_ops rated_wq_ops = {
+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,
.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);
+}
projects / fio.git / blobdiff