+/*
+ * Complete a single io_u for the sync engines.
+ */
+long io_u_sync_complete(struct thread_data *td, struct io_u *io_u)
+{
+ struct io_completion_data icd;
+
+ init_icd(&icd, 1);
+ io_completed(td, io_u, &icd);
+ put_io_u(td, io_u);
+
+ if (!icd.error)
+ return icd.bytes_done[0] + icd.bytes_done[1];
+
+ td_verror(td, icd.error, "io_u_sync_complete");
+ return -1;
+}
+
+/*
+ * Called to complete min_events number of io for the async engines.
+ */
+long io_u_queued_complete(struct thread_data *td, int min_events)
+{
+ struct io_completion_data icd;
+ struct timespec *tvp = NULL;
+ int ret;
+ struct timespec ts = { .tv_sec = 0, .tv_nsec = 0, };
+
+ if (!min_events)
+ tvp = &ts;
+
+ ret = td_io_getevents(td, min_events, td->cur_depth, tvp);
+ if (ret < 0) {
+ td_verror(td, -ret, "td_io_getevents");
+ return ret;
+ } else if (!ret)
+ return ret;
+
+ init_icd(&icd, ret);
+ ios_completed(td, &icd);
+ if (!icd.error)
+ return icd.bytes_done[0] + icd.bytes_done[1];
+
+ td_verror(td, icd.error, "io_u_queued_complete");
+ return -1;
+}
+
+/*
+ * Call when io_u is really queued, to update the submission latency.
+ */
+void io_u_queued(struct thread_data *td, struct io_u *io_u)
+{
+ unsigned long slat_time;
+
+ slat_time = mtime_since(&io_u->start_time, &io_u->issue_time);
+ add_slat_sample(td, io_u->ddir, slat_time);
+}
+
+#ifdef FIO_USE_TIMEOUT
+void io_u_set_timeout(struct thread_data *td)
+{
+ assert(td->cur_depth);
+
+ td->timer.it_interval.tv_sec = 0;
+ td->timer.it_interval.tv_usec = 0;
+ td->timer.it_value.tv_sec = IO_U_TIMEOUT + IO_U_TIMEOUT_INC;
+ td->timer.it_value.tv_usec = 0;
+ setitimer(ITIMER_REAL, &td->timer, NULL);
+ fio_gettime(&td->timeout_end, NULL);
+}
+
+static void io_u_dump(struct io_u *io_u)
+{
+ unsigned long t_start = mtime_since_now(&io_u->start_time);
+ unsigned long t_issue = mtime_since_now(&io_u->issue_time);
+
+ log_err("io_u=%p, t_start=%lu, t_issue=%lu\n", io_u, t_start, t_issue);
+ log_err(" buf=%p/%p, len=%lu/%lu, offset=%llu\n", io_u->buf, io_u->xfer_buf, io_u->buflen, io_u->xfer_buflen, io_u->offset);
+ log_err(" ddir=%d, fname=%s\n", io_u->ddir, io_u->file->file_name);
+}
+#else
+void io_u_set_timeout(struct thread_data fio_unused *td)
+{
+}
+#endif
+
+#ifdef FIO_USE_TIMEOUT
+static void io_u_timeout_handler(int fio_unused sig)
+{
+ struct thread_data *td, *__td;
+ pid_t pid = getpid();
+ struct list_head *entry;
+ struct io_u *io_u;
+ int i;
+
+ log_err("fio: io_u timeout\n");