ntb_msg_count
if (ntb_msg_count(perf->ntb) >= PERF_MSG_CNT) {
if (ntb_spad_count(ntb) < 1 && ntb_msg_count(ntb) < 1) {
} else if (ntb_msg_count(ntb) < 1) {
if (ntb_msg_count(pp->ntb) < 1)
tc->inmsg_cnt = ntb_msg_count(tc->ntb);
tc->peers[pidx].outmsg_cnt = ntb_msg_count(tc->ntb);