xsk_tx_batch_cq_descs
u32 nb_descs = xsk_tx_batch_cq_descs(batch);
if (!xsk_tx_batch_cq_descs(&batch)) {
cq_descs_before = xsk_tx_batch_cq_descs(&sum_batch);
offset = xsk_tx_batch_cq_descs(&sum_batch);
used = xsk_tx_batch_cq_descs(&curr_batch);
cq_descs_after = xsk_tx_batch_cq_descs(&sum_batch);