56. ethtool¶
查看和配置网卡的命令行工具
ethtool -p enP2p233s0f1 #端口闪灯，识别是哪一个物理网口
查看网卡enahisic2i0的基本参数
me@ubuntu:~$ ethtool enahisic2i0
Settings for enahisic2i0:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supported pause frame use: Symmetric
Supports auto-negotiation: Yes
Supported FEC modes: Not reported
Advertised link modes: 1000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Advertised FEC modes: Not reported
Link partner advertised link modes: 10baseT/Full
100baseT/Full
1000baseT/Full
Link partner advertised pause frame use: No
Link partner advertised auto-negotiation: Yes
Link partner advertised FEC modes: Not reported
Speed: 1000Mb/s #网口速率
Duplex: Full
Port: Twisted Pair
PHYAD: 0
Transceiver: internal
Auto-negotiation: on
MDI-X: off (auto)
Cannot get wake-on-lan settings: Operation not permitted
Link detected: yes #网线是否连接
查看网卡驱动
me@ubuntu:~$ ethtool -i enahisic2i0
driver: hns 驱动
version: 2.0 驱动版本
firmware-version: N/A
expansion-rom-version:
bus-info: platform
supports-statistics: yes
supports-test: yes
supports-eeprom-access: no
supports-register-dump: yes
supports-priv-flags: no
me@ubuntu:~$
查看网卡高级设置
me@ubuntu:~$ sudo ethtool -k enahisic2i0
[sudo] password for me:
Features for enahisic2i0:
rx-checksumming: on
tx-checksumming: on
tx-checksum-ipv4: on
tx-checksum-ip-generic: off [fixed]
tx-checksum-ipv6: on
tx-checksum-fcoe-crc: off [fixed]
tx-checksum-sctp: off [fixed]
scatter-gather: on
tx-scatter-gather: on
tx-scatter-gather-fraglist: off [fixed]
tcp-segmentation-offload: on
tx-tcp-segmentation: on
tx-tcp-ecn-segmentation: off [fixed]
tx-tcp-mangleid-segmentation: off
tx-tcp6-segmentation: on
udp-fragmentation-offload: off
generic-segmentation-offload: on
generic-receive-offload: on
large-receive-offload: off [fixed] #fixed 代表默认配置
rx-vlan-offload: off [fixed]
tx-vlan-offload: off [fixed]
ntuple-filters: off [fixed]
receive-hashing: off [fixed]
highdma: off [fixed]
rx-vlan-filter: off [fixed]
vlan-challenged: off [fixed]
tx-lockless: off [fixed]
netns-local: off [fixed]
tx-gso-robust: off [fixed]
tx-fcoe-segmentation: off [fixed]
tx-gre-segmentation: off [fixed]
tx-gre-csum-segmentation: off [fixed]
tx-ipxip4-segmentation: off [fixed
打开或者关闭网卡参数
ethtool -K enp125s0f2 rx-vlan-offload off
ethtool -K enp125s0f2 tx-vlan-offload off
ethtool -K enp125s0f2 rx-vlan-filter off
ethtool -K enp125s0f2 tx-gre-segmentation off
ethtool -K enp125s0f2 tx-udp_tnl-segmentation on
ethtool -K enp125s0f2 tx-udp_tnl-csum-segmentation on
56.1. 网卡队列和中断¶
1、判断当前系统环境是否支持多队列网卡，执行命令:
lspci -vvv
root@ubuntu:~# lspci -vvv | grep MSI-X
pcilib: sysfs_read_vpd: read failed: Input/output error
pcilib: sysfs_read_vpd: read failed: Input/output error
Capabilities: [c0] MSI-X: Enable+ Count=97 Masked-
Capabilities: [70] MSI-X: Enable+ Count=64 Masked-
Capabilities: [70] MSI-X: Enable+ Count=64 Masked-
pcilib: sysfs_read_vpd: read failed: Input/output error
如果在Ethernet项中。含有Capabilities: [c0] MSI-X: Enable+ Count=97 Masked-语句，则说明当前系统环境是支持多队列网卡的，否则不支持。
2、查看网卡接口是否支持多队列，最多支持多少、当前开启多少
ethtool -l eth0
不同设备的输出结果 [ethtool -l结果]
ARM
me@ubuntu:~$ ethtool -l enahisic2i0
Channel parameters for enahisic2i0:
Pre-set maximums:
RX: 16
TX: 16
Other: 0
Combined: 0
Current hardware settings:
RX: 16
TX: 16
Other: 0
Combined: 0
X86
root@ubuntu:~# ethtool -l enp2s0f0
Channel parameters for enp2s0f0:
Pre-set maximums:
RX: 0
TX: 0
Other: 1
Combined: 63
Current hardware settings:
RX: 0
TX: 0
Other: 1
Combined: 63
3、设置网卡当前使用多队列。
ethtool -L eth0 combined <N> #N为要使能的队列数
56.2. 在96核ARM服务器上试验¶
[root@localhost ~]# ethtool -l eno3
Channel parameters for eno3:
Pre-set maximums:
RX: 0
TX: 0
Other: 1
Combined: 8
Current hardware settings:
RX: 0
TX: 0
Other: 1
Combined: 8
[root@localhost ~]# ethtool -L eno3 combined 4
[root@localhost ~]# ethtool -l eno3
Channel parameters for eno3:
Pre-set maximums:
RX: 0
TX: 0
Other: 1
Combined: 8
Current hardware settings:
RX: 0
TX: 0
Other: 1
Combined: 4
[root@localhost ~]#
4、要确保多队列确实生效，可以查看文件
root@ubuntu:~# ls /sys/class/net/enp2s0f0/queues/
rx-0 rx-14 rx-2 rx-25 rx-30 rx-36 rx-41 rx-47 rx-52 rx-58 rx-7 tx-11 tx-17 tx-22 tx-28 tx-33 tx-39 tx-44 tx-5 tx-55 tx-60
rx-1 rx-15 rx-20 rx-26 rx-31 rx-37 rx-42 rx-48 rx-53 rx-59 rx-8 tx-12 tx-18 tx-23 tx-29 tx-34 tx-4 tx-45 tx-50 tx-56 tx-61
rx-10 rx-16 rx-21 rx-27 rx-32 rx-38 rx-43 rx-49 rx-54 rx-6 rx-9 tx-13 tx-19 tx-24 tx-3 tx-35 tx-40 tx-46 tx-51 tx-57 tx-62
rx-11 rx-17 rx-22 rx-28 rx-33 rx-39 rx-44 rx-5 rx-55 rx-60 tx-0 tx-14 tx-2 tx-25 tx-30 tx-36 tx-41 tx-47 tx-52 tx-58 tx-7
rx-12 rx-18 rx-23 rx-29 rx-34 rx-4 rx-45 rx-50 rx-56 rx-61 tx-1 tx-15 tx-20 tx-26 tx-31 tx-37 tx-42 tx-48 tx-53 tx-59 tx-8
rx-13 rx-19 rx-24 rx-3 rx-35 rx-40 rx-46 rx-51 rx-57 rx-62 tx-10 tx-16 tx-21 tx-27 tx-