You can find the network adapter speed by the
ethtool: query or control network driver and hardware settings
For example, to find the speed of the adapter gate, you can run
# ethtool gate
If will print information like:
# ethtool gate Settings for gate: Supported ports: [ TP MII ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Half 1000baseT/Full Supported pause frame use: No Supports auto-negotiation: Yes Advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Half 1000baseT/Full Advertised pause frame use: Symmetric Receive-only Advertised auto-negotiation: Yes Link partner advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Link partner advertised pause frame use: No Link partner advertised auto-negotiation: Yes Speed: 1000Mb/s Duplex: Full Port: MII PHYAD: 0 Transceiver: internal Auto-negotiation: on Supports Wake-on: pumbg Wake-on: g Current message level: 0x00000033 (51) drv probe ifdown ifup Link detected: yes
Here “Speed: 1000Mb/s” and “Duplex: Full” show the adapter “gate” is running in duplex mode at speed of 1000Mb/s.
You need to benchmark it to find how the actually speed is. The rate here is the hardware/link limit.