*
*/
#include "fio.h"
-#include "ioengine.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 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);
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;
{
struct thread_data *parent = sw->wq->td;
struct thread_data *td = sw->priv;
- int fio_unused ret;
memcpy(&td->o, &parent->o, sizeof(td->o));
memcpy(&td->ts, &parent->ts, sizeof(td->ts));
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);
+ 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;