我正在使用带有 RTL8125 2.5GbE 控制器的 PCIe 扩展卡。我r8125-9.007.01已从这里成功，但是当我运行时# lshw -class network我看到capacity: 1Gbit/s。
*-network
description: Ethernet interface
product: RTL8125 2.5GbE Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:28:00.0
logical name: enp40s0
version: 04
serial: e0:e1:a9:57:80:94
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list rom ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8125 driverversion=9.007.01-NAPI latency=0 link=no multicast=yes port=twisted pair
resources: irq:38 ioport:d000(size=256) memory:fcb10000-fcb1ffff memory:fcb20000-fcb23fff memory:fcb00000-fcb0ffff
到目前为止我已经尝试了以下命令但它们并没有改变任何东西：
# ethtool -s enp40s0 autoneg on advertise 0x80000000002f# ethtool -s enp40s0 speed 2500 duplex full autoneg on
该以太网端口连接到 Windows PC（也具有 2.5GbE 适配器），控制面板上正确显示 2.5Gb/s。
我尝试通过 samba 复制一个大文件，但速度只有 1Gb/s。任何帮助都非常感谢！使用宣传速度的 NIC 应该不会这么难。
编辑：
经过进一步挖掘，sudo ethtool enp40s0我得到了：
sudo ethtool enp40s0
Settings for enp40s0:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
2500baseT/Full
Supported pause frame use: Symmetric Receive-only
Supports auto-negotiation: Yes
Supported FEC modes: Not reported
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
2500baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Advertised FEC modes: Not reported
Link partner advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
2500baseT/Full
Link partner advertised pause frame use: No
Link partner advertised auto-negotiation: Yes
Link partner advertised FEC modes: Not reported
Speed: 2500Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 0
Transceiver: internal
Auto-negotiation: on
MDI-X: Unknown
Supports Wake-on: pumbg
Wake-on: d
Current message level: 0x00000033 (51)
drv probe ifdown ifup
Link detected: yes
我觉得这看起来不错，但对于 2.5Gb/s 的连接来说，文件传输速度仍然很慢。您能想到其他测试速度的方法吗？
编辑2： iperf测试截图 看起来性能在一个方向上仅限制在 1Gb/s！只有当 Ubuntu 是接收方时，我才会获得较慢的速度。如果 Ubuntu 是发送方，我就会获得完整的 2.5Gb/s。此时不可能是电缆的问题。
答案1
尝试insmod ./src/r8125.ko speed=SPEED_MODE duplex=DUPLEX_MODE autoneg=NWAY_OPTION在构建驱动程序的目录中运行。