In addition to the TX and RX delays in Table 1, you should add an additional 0.5 UI of latency for each 1 Gb/s increment in line rate beyond 4 Gb/s to the total round trip (TX path + RX path) latency.
In addition to the TX and RX delays in Table 1, you should add an additional 0.5 UI of latency for each 1 Gb/s increment in line rate beyond 4 Gb/s to the total round trip (TX path + RX path) latency.