KTR_IF_EM
#if !defined(KTR_IF_EM)
KTR_INFO(KTR_IF_EM, if_em, intr_beg, 0, "intr begin");
KTR_INFO(KTR_IF_EM, if_em, intr_end, 1, "intr end");
KTR_INFO(KTR_IF_EM, if_em, pkt_receive, 4, "rx packet");
KTR_INFO(KTR_IF_EM, if_em, pkt_txqueue, 5, "tx packet");
KTR_INFO(KTR_IF_EM, if_em, pkt_txclean, 6, "tx clean");