linux centos查看网卡信息的方法，安装pciutils使用lspci命令，KVM虚拟化网络性能定义SR-IOV > Virtio > 模拟卡

小樱

linux centos查看网卡信息的方法，安装pciutils使用lspci命令，KVM虚拟化网络性能定义SR-IOV > Virtio > 模拟卡

1. yum -y install pciutils

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查看基本信息：

1. lspci

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模拟卡显示为

00:00.0 Host bridge: Intel Corporation 440FX - 82441FX PMC [Natoma] (rev 02)
00:01.0 ISA bridge: Intel Corporation 82371SB PIIX3 ISA [Natoma/Triton II]
00:01.1 IDE interface: Intel Corporation 82371SB PIIX3 IDE [Natoma/Triton II]
00:01.2 USB controller: Intel Corporation 82371SB PIIX3 USB [Natoma/Triton II] (rev 01)
00:01.3 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ACPI (rev 03)
00:02.0 VGA compatible controller: Cirrus Logic GD 5446
00:03.0 Ethernet controller: Intel Corporation 82540EM Gigabit Ethernet Controller (rev 03)
00:04.0 RAM memory: Red Hat, Inc. Virtio memory balloon

Virtio显示为

00:00.0 Host bridge: Intel Corporation 440FX - 82441FX PMC [Natoma] (rev 02)
00:01.0 ISA bridge: Intel Corporation 82371SB PIIX3 ISA [Natoma/Triton II]
00:01.1 IDE interface: Intel Corporation 82371SB PIIX3 IDE [Natoma/Triton II]
00:01.2 USB controller: Intel Corporation 82371SB PIIX3 USB [Natoma/Triton II] (rev 01)
00:01.3 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ACPI (rev 03)
00:02.0 VGA compatible controller: Cirrus Logic GD 5446
00:03.0 Ethernet controller: Red Hat, Inc. Virtio network device
00:04.0 SCSI storage controller: Red Hat, Inc. Virtio block device
00:05.0 Unclassified device [00ff]: Red Hat, Inc. Virtio memory balloon
00:06.0 Unclassified device [00ff]: Red Hat, Inc. Virtio RNG

查看详细信息：

1. lspci -vvv

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查看网卡信息：

1. lspci | grep Ethernet

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模拟卡显示为

00:03.0 Ethernet controller: Intel Corporation 82540EM Gigabit Ethernet Controller (rev 03)

Virtio显示为

00:03.0 Ethernet controller: Red Hat, Inc. Virtio network device

查看网卡驱动版本

1. lshw -c network -businfo

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模拟卡显示为

Bus info          Device      Class      Description
====================================================
pci@0000:00:03.0  ens3        network    82540EM Gigabit Ethernet Controller

Virtio显示为

Bus info          Device      Class      Description
====================================================
pci@0000:00:03.0              network    Virtio network device
virtio@0          eth0        network    Ethernet interface

1. ethtool -i eth0

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模拟卡显示为

driver: e1000
version: 7.3.21-k8-NAPI
firmware-version:
expansion-rom-version:
bus-info: 0000:00:03.0
supports-statistics: yes
supports-test: yes
supports-eeprom-access: yes
supports-register-dump: yes
supports-priv-flags: no

Virtio显示为

driver: virtio_net
version: 1.0.0
firmware-version:
expansion-rom-version:
bus-info: 0000:00:03.0
supports-statistics: no
supports-test: no
supports-eeprom-access: no
supports-register-dump: no
supports-priv-flags: no

查看是否支持SR-IOV（00:03.0字符串通过lspci | grep Ethernet 命令获取）

1. lspci -s 00:03.0 -vvv | grep -i "modules"

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输出e1000代表是模拟卡，输出virtio_pci代表是Virtio

性能区别，网络性能定义在 SR-IOV > Virtio > 模拟卡：https://bbs.itzmx.com/thread-99381-1-1.html
参考：https://www.linux-kvm.org/page/10G_NIC_performance:_VFIO_vs_virtio
https://www.juniper.net/documentation/en_US/junos/topics/concept/disaggregated-junos-virtio-sr-iov.html

小樱

补一张hyper的
lspci -vvv

1. 00:00.0 Host bridge: Intel Corporation 440BX/ZX/DX - 82443BX/ZX/DX Host bridge (AGP disabled) (rev 03)
   
2.         Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
   
3.         Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
   
4.         Latency: 0
   
5. 
   
6. 00:07.0 ISA bridge: Intel Corporation 82371AB/EB/MB PIIX4 ISA (rev 01)
   
7.         Subsystem: Microsoft Corporation Device 0000
   
8.         Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
   
9.         Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
   
10.         Latency: 0
    
11. 
    
12. 00:07.1 IDE interface: Intel Corporation 82371AB/EB/MB PIIX4 IDE (rev 01) (prog-if 80 [ISA Compatibility mode-only controller, supports bus mastering])
    
13.         Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
    
14.         Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
    
15.         Latency: 0
    
16.         Region 0: [virtual] Memory at 000001f0 (32-bit, non-prefetchable) [size=8]
    
17.         Region 1: [virtual] Memory at 000003f0 (type 3, non-prefetchable)
    
18.         Region 2: [virtual] Memory at 00000170 (32-bit, non-prefetchable) [size=8]
    
19.         Region 3: [virtual] Memory at 00000370 (type 3, non-prefetchable)
    
20.         Region 4: I/O ports at ffa0 [size=16]
    
21.         Kernel driver in use: ata_piix
    
22.         Kernel modules: ata_generic, pata_acpi, ata_piix
    
23. 
    
24. 00:07.3 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ACPI (rev 02)
    
25.         Control: I/O+ Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
    
26.         Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
    
27.         Interrupt: pin A routed to IRQ 9
    
28.         Kernel modules: i2c-piix4
    
29. 
    
30. 00:08.0 VGA compatible controller: Microsoft Corporation Hyper-V virtual VGA (prog-if 00 [VGA controller])
    
31.         Control: I/O+ Mem+ BusMaster+ SpecCycle+ MemWINV+ VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
    
32.         Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
    
33.         Latency: 0
    
34.         Interrupt: pin A routed to IRQ 11
    
35.         Region 0: Memory at f8000000 (32-bit, non-prefetchable) [size=64M]
    
36.         Expansion ROM at <unassigned> [disabled]
    
37.         Kernel driver in use: hyperv_fb
    
38.         Kernel modules: hyperv_fb

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ethtool -i eth0

driver: hv_netvsc
version: 3.1
firmware-version: N/A
bus-info:
supports-statistics: no
supports-test: no
supports-eeprom-access: no
supports-register-dump: no
supports-priv-flags: no