xsk_ring_cons__peek
rcvd = xsk_ring_cons__peek(&xsk->rx, xsk->batch_size, &idx_rx);
rcvd = xsk_ring_cons__peek(&xsk->umem->cq, batch_size, &idx);
if (ASSERT_EQ(xsk_ring_cons__peek(&xsk->comp, 1, &idx), 1, "xsk_ring_cons__peek")) {
ret = xsk_ring_cons__peek(&xsk->rx, 1, &idx);
if (!xsk_ring_cons__peek(&xsk->comp, 1, &idx))
ret = xsk_ring_cons__peek(&xsk->rx, 1, &idx);