struct ioring_options {
void *pad;
unsigned int hipri;
+ unsigned int cmdprio_percentage;
unsigned int fixedbufs;
unsigned int registerfiles;
unsigned int sqpoll_thread;
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_IOURING,
},
+#ifdef FIO_HAVE_IOPRIO_CLASS
+ {
+ .name = "cmdprio_percentage",
+ .lname = "high priority percentage",
+ .type = FIO_OPT_INT,
+ .off1 = offsetof(struct ioring_options, cmdprio_percentage),
+ .minval = 1,
+ .maxval = 100,
+ .help = "Send high priority I/O this percentage of the time",
+ .category = FIO_OPT_C_ENGINE,
+ .group = FIO_OPT_G_IOURING,
+ },
+#else
+ {
+ .name = "cmdprio_percentage",
+ .lname = "high priority percentage",
+ .type = FIO_OPT_UNSUPPORTED,
+ .help = "Your platform does not support I/O priority classes",
+ },
+#endif
{
.name = "fixedbufs",
.lname = "Fixed (pre-mapped) IO buffers",
return r < 0 ? r : events;
}
+static void fio_ioring_prio_prep(struct thread_data *td, struct io_u *io_u)
+{
+ struct ioring_options *o = td->eo;
+ struct ioring_data *ld = td->io_ops_data;
+ if (rand_between(&td->prio_state, 0, 99) < o->cmdprio_percentage) {
+ ld->sqes[io_u->index].ioprio = IOPRIO_CLASS_RT << IOPRIO_CLASS_SHIFT;
+ io_u->flags |= IO_U_F_PRIORITY;
+ }
+ return;
+}
+
static enum fio_q_status fio_ioring_queue(struct thread_data *td,
struct io_u *io_u)
{
struct ioring_data *ld = td->io_ops_data;
struct io_sq_ring *ring = &ld->sq_ring;
+ struct ioring_options *o = td->eo;
unsigned tail, next_tail;
fio_ro_check(td, io_u);
/* ensure sqe stores are ordered with tail update */
write_barrier();
+ if (o->cmdprio_percentage)
+ fio_ioring_prio_prep(td, io_u);
ring->array[tail & ld->sq_ring_mask] = io_u->index;
*ring->tail = next_tail;
write_barrier();
{
struct ioring_options *o = td->eo;
struct ioring_data *ld;
+ struct thread_options *to = &td->o;
/* sqthread submission requires registered files */
if (o->sqpoll_thread)
ld->iovecs = calloc(td->o.iodepth, sizeof(struct iovec));
td->io_ops_data = ld;
+
+ /*
+ * Check for option conflicts
+ */
+ if ((fio_option_is_set(to, ioprio) || fio_option_is_set(to, ioprio_class)) &&
+ o->cmdprio_percentage != 0) {
+ log_err("%s: cmdprio_percentage option and mutually exclusive "
+ "prio or prioclass option is set, exiting\n", to->name);
+ td_verror(td, EINVAL, "fio_io_uring_init");
+ return 1;
+ }
return 0;
}