C_TX_WAIT
[C_TX_WAIT] = TXE64_PORT_CNTR_ELEM(TxWait, SEND_WAIT_CNT, CNTR_SYNTH),
read_port_cntr(ppd, C_TX_WAIT, CNTR_INVALID_VL);
write_port_cntr(ppd, C_TX_WAIT, CNTR_INVALID_VL, 0);