我有一个新的 Intel X540-T1 网络适配器。我安装了最新的 Intel ixgbe-4.1.5 驱动程序。该卡能够从 DHCP 获取 IP 地址。但是，浏览网站和安装软件包的速度apt-get非常慢，BitTorrent 根本无法连接。例如，我使用 apt-get 下载了 Webmin 以查看它是否有帮助。经过几次尝试，apt-get 才最终能够解析域名，然后花了几分钟下载了约 20 MB。但是，通常这样的下载需要一分钟左右（我连接到快速的大学 LAN 连接）。
有什么想法吗？ixgbe 模块的某些参数是否有帮助？如果有，是哪些？
我确实搜索了一下。这个问题不适用于我的情况：intel-nic-x540-t1-在 ubuntu-server-12-04 中不起作用。
注意：在下面输出时没有与 10GigE 适配器关联的 IP，否则我就无法访问这个网站。
一些输出：
$ uname -a
Linux localhost 3.13.0-66-generic #108-Ubuntu SMP Wed Oct 7 15:20:27 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
$ ifconfig p1p1
p1p1 Link encap:Ethernet HWaddr a0:36:9f:75:5c:ca
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
$ ethtool -i p1p1
driver: ixgbe
version: 3.15.1-k
firmware-version: 0x8000037c
bus-info: 0000:01:00.0
supports-statistics: yes
supports-test: yes
supports-eeprom-access: yes
supports-register-dump: yes
supports-priv-flags: no
$ sudo lspci -vvnns 01:00.0
01:00.0 Ethernet controller [0200]: Intel Corporation Ethernet Controller 10-Gigabit X540-AT2 [8086:1528] (rev 01)
Subsystem: Intel Corporation Ethernet Converged Network Adapter X540-T1 [8086:0002]
Physical Slot: 2
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0
Interrupt: pin A routed to IRQ 26
Region 0: Memory at f2200000 (64-bit, prefetchable) [size=2M]
Region 4: Memory at f2400000 (64-bit, prefetchable) [size=16K]
Expansion ROM at fb100000 [disabled] [size=512K]
Capabilities: [40] Power Management version 3
Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold-)
Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=1 PME-
Capabilities: [50] MSI: Enable- Count=1/1 Maskable+ 64bit+
Address: 0000000000000000 Data: 0000
Masking: 00000000 Pending: 00000000
Capabilities: [70] MSI-X: Enable+ Count=64 Masked-
Vector table: BAR=4 offset=00000000
PBA: BAR=4 offset=00002000
Capabilities: [a0] Express (v2) Endpoint, MSI 00
DevCap: MaxPayload 512 bytes, PhantFunc 0, Latency L0s <512ns, L1 <64us
ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset+
DevCtl: Report errors: Correctable+ Non-Fatal+ Fatal+ Unsupported+
RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop+ FLReset-
MaxPayload 256 bytes, MaxReadReq 512 bytes
DevSta: CorrErr+ UncorrErr- FatalErr- UnsuppReq+ AuxPwr- TransPend-
LnkCap: Port #0, Speed 5GT/s, Width x8, ASPM L0s L1, Exit Latency L0s <1us, L1 <8us
ClockPM- Surprise- LLActRep- BwNot-
LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- CommClk+
ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
LnkSta: Speed 5GT/s, Width x8, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
DevCap2: Completion Timeout: Range ABCD, TimeoutDis+, LTR-, OBFF Not Supported
DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR-, OBFF Disabled
LnkCtl2: Target Link Speed: 5GT/s, EnterCompliance- SpeedDis-
Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS-
Compliance De-emphasis: -6dB
LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete-, EqualizationPhase1-
EqualizationPhase2-, EqualizationPhase3-, LinkEqualizationRequest-
Capabilities: [100 v2] Advanced Error Reporting
UESta: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
UEMsk: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
UESvrt: DLP+ SDES+ TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt- RxOF+ MalfTLP+ ECRC- UnsupReq- ACSViol-
CESta: RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+
CEMsk: RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+
AERCap: First Error Pointer: 00, GenCap+ CGenEn- ChkCap+ ChkEn-
Capabilities: [140 v1] Device Serial Number a0-36-9f-ff-ff-75-5c-ca
Capabilities: [150 v1] Alternative Routing-ID Interpretation (ARI)
ARICap: MFVC- ACS-, Next Function: 0
ARICtl: MFVC- ACS-, Function Group: 0
Capabilities: [160 v1] Single Root I/O Virtualization (SR-IOV)
IOVCap: Migration-, Interrupt Message Number: 000
IOVCtl: Enable- Migration- Interrupt- MSE- ARIHierarchy+
IOVSta: Migration-
Initial VFs: 64, Total VFs: 64, Number of VFs: 0, Function Dependency Link: 00
VF offset: 128, stride: 2, Device ID: 1515
Supported Page Size: 00000553, System Page Size: 00000001
Region 0: Memory at 00000000fb280000 (64-bit, non-prefetchable)
Region 3: Memory at 00000000fb180000 (64-bit, non-prefetchable)
VF Migration: offset: 00000000, BIR: 0
Capabilities: [1d0 v1] Access Control Services
ACSCap: SrcValid- TransBlk- ReqRedir- CmpltRedir- UpstreamFwd- EgressCtrl- DirectTrans-
ACSCtl: SrcValid- TransBlk- ReqRedir- CmpltRedir- UpstreamFwd- EgressCtrl- DirectTrans-
Kernel driver in use: ixgbe
$ lsmod | grep ixg
ixgbe 233377 0
dca 15130 2 igb,ixgbe
ptp 18933 2 igb,ixgbe
mdio 13807 1 ixgbe
$ modinfo ixgbe
filename: /lib/modules/3.13.0-66-generic/kernel/drivers/net/ethernet/intel/ixgbe/ixgbe.ko
version: 4.1.5
license: GPL
description: Intel(R) 10 Gigabit PCI Express Network Driver
author: Intel Corporation, <[email protected]>
srcversion: 9781CEF8A3110F93FF9DBA8
alias: pci:v00008086d000015ADsv*sd*bc*sc*i*
alias: pci:v00008086d00001560sv*sd*bc*sc*i*
alias: pci:v00008086d00001558sv*sd*bc*sc*i*
alias: pci:v00008086d0000154Asv*sd*bc*sc*i*
alias: pci:v00008086d00001557sv*sd*bc*sc*i*
alias: pci:v00008086d0000154Fsv*sd*bc*sc*i*
alias: pci:v00008086d0000154Dsv*sd*bc*sc*i*
alias: pci:v00008086d00001528sv*sd*bc*sc*i*
alias: pci:v00008086d000010F8sv*sd*bc*sc*i*
alias: pci:v00008086d0000151Csv*sd*bc*sc*i*
alias: pci:v00008086d00001529sv*sd*bc*sc*i*
alias: pci:v00008086d0000152Asv*sd*bc*sc*i*
alias: pci:v00008086d000010F9sv*sd*bc*sc*i*
alias: pci:v00008086d00001514sv*sd*bc*sc*i*
alias: pci:v00008086d00001507sv*sd*bc*sc*i*
alias: pci:v00008086d000010FBsv*sd*bc*sc*i*
alias: pci:v00008086d00001517sv*sd*bc*sc*i*
alias: pci:v00008086d000010FCsv*sd*bc*sc*i*
alias: pci:v00008086d000010F7sv*sd*bc*sc*i*
alias: pci:v00008086d00001508sv*sd*bc*sc*i*
alias: pci:v00008086d000010DBsv*sd*bc*sc*i*
alias: pci:v00008086d000010F4sv*sd*bc*sc*i*
alias: pci:v00008086d000010E1sv*sd*bc*sc*i*
alias: pci:v00008086d000010F1sv*sd*bc*sc*i*
alias: pci:v00008086d000010ECsv*sd*bc*sc*i*
alias: pci:v00008086d000010DDsv*sd*bc*sc*i*
alias: pci:v00008086d0000150Bsv*sd*bc*sc*i*
alias: pci:v00008086d000010C8sv*sd*bc*sc*i*
alias: pci:v00008086d000010C7sv*sd*bc*sc*i*
alias: pci:v00008086d000010C6sv*sd*bc*sc*i*
alias: pci:v00008086d000010B6sv*sd*bc*sc*i*
depends: ptp,dca,vxlan
vermagic: 3.13.0-66-generic SMP mod_unload modversions
parm: InterruptType:Change Interrupt Mode (0=Legacy, 1=MSI, 2=MSI-X), default IntMode (deprecated) (array of int)
parm: IntMode:Change Interrupt Mode (0=Legacy, 1=MSI, 2=MSI-X), default 2 (array of int)
parm: MQ:Disable or enable Multiple Queues, default 1 (array of int)
parm: DCA:Disable or enable Direct Cache Access, 0=disabled, 1=descriptor only, 2=descriptor and data (array of int)
parm: RSS:Number of Receive-Side Scaling Descriptor Queues, default 0=number of cpus (array of int)
parm: VMDQ:Number of Virtual Machine Device Queues: 0/1 = disable, 2-16 enable (default=8) (array of int)
parm: max_vfs:Number of Virtual Functions: 0 = disable (default), 1-63 = enable this many VFs (array of int)
parm: VEPA:VEPA Bridge Mode: 0 = VEB (default), 1 = VEPA (array of int)
parm: InterruptThrottleRate:Maximum interrupts per second, per vector, (0,1,956-488281), default 1 (array of int)
parm: LLIPort:Low Latency Interrupt TCP Port (0-65535) (array of int)
parm: LLIPush:Low Latency Interrupt on TCP Push flag (0,1) (array of int)
parm: LLISize:Low Latency Interrupt on Packet Size (0-1500) (array of int)
parm: LLIEType:Low Latency Interrupt Ethernet Protocol Type (array of int)
parm: LLIVLANP:Low Latency Interrupt on VLAN priority threshold (array of int)
parm: FdirPballoc:Flow Director packet buffer allocation level:
1 = 8k hash filters or 2k perfect filters
2 = 16k hash filters or 4k perfect filters
3 = 32k hash filters or 8k perfect filters (array of int)
parm: AtrSampleRate:Software ATR Tx packet sample rate (array of int)
parm: FCoE:Disable or enable FCoE Offload, default 1 (array of int)
parm: LRO:Large Receive Offload (0,1), default 1 = on (array of int)
parm: allow_unsupported_sfp:Allow unsupported and untested SFP+ modules on 82599 based adapters, default 0 = Disable (array of int)
parm: dmac_watchdog:DMA coalescing watchdog in microseconds (0,41-10000), default 0 = off (array of int)
parm: vxlan_rx:VXLAN receive checksum offload (0,1), default 1 = Enable (array of int)
答案1
瞎猜，这个问题相当老了，但是你启用了 IP 转发吗（是吗？）或者你正在将它与桥接工具一起使用（似乎没有）？尝试禁用 LRO。
来自英特尔发布说明：
重要笔记
如果启用 IP 转发或桥接，请禁用 LRO
警告：ixgbe 驱动程序支持大型接收卸载 (LRO) 功能。此选项可提供最低的接收 CPU 利用率，但与路由/IP 转发和桥接。如果必须启用 ip 转发或桥接，则必须使用编译时选项禁用 LRO，如本文档后面的 LRO 部分所述。如果在结合使用 ip 转发或桥接时不禁用 LRO，则可能导致吞吐量低甚至内核崩溃。