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Groups > linux.debian.kernel > #88610 > unrolled thread
| Started by | Colm Buckley <colm@tuatha.org> |
|---|---|
| First post | 2025-07-31 17:30 +0200 |
| Last post | 2025-08-03 05:20 +0200 |
| Articles | 3 — 3 participants |
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Bug#1110193: r8169 Rx very slow; r8168 works fine Colm Buckley <colm@tuatha.org> - 2025-07-31 17:30 +0200
Processed: Re: Bug#1110193: r8169 Rx very slow; r8168 works fine "Debian Bug Tracking System" <owner@bugs.debian.org> - 2025-08-03 05:20 +0200
Bug#1110193: r8169 Rx very slow; r8168 works fine Ben Hutchings <ben@decadent.org.uk> - 2025-08-03 05:20 +0200
| From | Colm Buckley <colm@tuatha.org> |
|---|---|
| Date | 2025-07-31 17:30 +0200 |
| Subject | Bug#1110193: r8169 Rx very slow; r8168 works fine |
| Message-ID | <LeDod-4a24-1@gated-at.bofh.it> |
Source: linux
Version: 6.12.38+deb12
Severity: normal
X-Debbugs-Cc: colm@tuatha.org, nic_swsd@realtek.com, romieu@fr.zoreil.com, netdev@vger.kernel.org
Dear Maintainer,
Recent Debian kernels in the 6.12 series (in particular, from
6.12.33+deb12-amd64 onwards, up to and including 6.12.38+deb12-amd64)
are causing serious slowdowns in receive performance on my (Realtek)
ethernet connection. Regardless of protocol or connection address,
read speed seems to be limited to between 5 and 10 Mb/s.
Installing the r8168 module using r8168-dkms works fine, and read
speeds are up to 1000Mb/s as expected.
The lspci output for this card is:
2c:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 15)
Subsystem: Realtek Semiconductor Co., Ltd. RTL8111/8168/8211/8411 PCI Express Gigabit Ethernet Controller
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, Cache Line Size: 64 bytes
Interrupt: pin A routed to IRQ 19
IOMMU group: 15
Region 0: I/O ports at 3000 [size=256]
Region 2: Memory at 5e204000 (64-bit, non-prefetchable) [size=4K]
Region 4: Memory at 5e200000 (64-bit, non-prefetchable) [size=16K]
Capabilities: [40] Power Management version 3
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+
Address: 0000000000000000 Data: 0000
Capabilities: [70] Express (v2) Endpoint, MSI 01
DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <512ns, L1 <64us
ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset- SlotPowerLimit 10W
DevCtl: CorrErr- NonFatalErr- FatalErr- UnsupReq-
RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop-
MaxPayload 128 bytes, MaxReadReq 4096 bytes
DevSta: CorrErr- NonFatalErr- FatalErr- UnsupReq- AuxPwr+ TransPend+
LnkCap: Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Exit Latency L0s unlimited, L1 <64us
ClockPM+ Surprise- LLActRep- BwNot- ASPMOptComp+
LnkCtl: ASPM Disabled; RCB 64 bytes, Disabled- CommClk+
ExtSynch- ClockPM+ AutWidDis- BWInt- AutBWInt-
LnkSta: Speed 2.5GT/s, Width x1
TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
DevCap2: Completion Timeout: Range ABCD, TimeoutDis+ NROPrPrP- LTR+
10BitTagComp- 10BitTagReq- OBFF Via message/WAKE#, ExtFmt- EETLPPrefix-
EmergencyPowerReduction Not Supported, EmergencyPowerReductionInit-
FRS- TPHComp- ExtTPHComp-
AtomicOpsCap: 32bit- 64bit- 128bitCAS-
DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis- LTR+ 10BitTagReq- OBFF Disabled,
AtomicOpsCtl: ReqEn-
LnkCap2: Supported Link Speeds: 2.5GT/s, Crosslink- Retimer- 2Retimers- DRS-
LnkCtl2: Target Link Speed: 2.5GT/s, EnterCompliance- SpeedDis-
Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS-
Compliance Preset/De-emphasis: -6dB de-emphasis, 0dB preshoot
LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete- EqualizationPhase1-
EqualizationPhase2- EqualizationPhase3- LinkEqualizationRequest-
Retimer- 2Retimers- CrosslinkRes: unsupported
Capabilities: [b0] MSI-X: Enable+ Count=4 Masked-
Vector table: BAR=4 offset=00000000
PBA: BAR=4 offset=00000800
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- AdvNonFatalErr-
CEMsk: RxErr- BadTLP- BadDLLP- Rollover- Timeout- AdvNonFatalErr+
AERCap: First Error Pointer: 00, ECRCGenCap+ ECRCGenEn- ECRCChkCap+ ECRCChkEn-
MultHdrRecCap- MultHdrRecEn- TLPPfxPres- HdrLogCap-
HeaderLog: 00000000 00000000 00000000 00000000
Capabilities: [140 v1] Virtual Channel
Caps: LPEVC=0 RefClk=100ns PATEntryBits=1
Arb: Fixed- WRR32- WRR64- WRR128-
Ctrl: ArbSelect=Fixed
Status: InProgress-
VC0: Caps: PATOffset=00 MaxTimeSlots=1 RejSnoopTrans-
Arb: Fixed- WRR32- WRR64- WRR128- TWRR128- WRR256-
Ctrl: Enable+ ID=0 ArbSelect=Fixed TC/VC=ff
Status: NegoPending- InProgress-
Capabilities: [160 v1] Device Serial Number 01-00-00-00-68-4c-e0-00
Capabilities: [170 v1] Latency Tolerance Reporting
Max snoop latency: 3145728ns
Max no snoop latency: 3145728ns
Capabilities: [178 v1] L1 PM Substates
L1SubCap: PCI-PM_L1.2+ PCI-PM_L1.1+ ASPM_L1.2+ ASPM_L1.1+ L1_PM_Substates+
PortCommonModeRestoreTime=150us PortTPowerOnTime=150us
L1SubCtl1: PCI-PM_L1.2- PCI-PM_L1.1- ASPM_L1.2- ASPM_L1.1-
T_CommonMode=0us LTR1.2_Threshold=306176ns
L1SubCtl2: T_PwrOn=150us
Kernel driver in use: r8168
Kernel modules: r8168
-- System Information:
Debian Release: 12.11
APT prefers stable-updates
APT policy: (900, 'stable-updates'), (900, 'stable-security'), (900, 'stable')
Architecture: amd64 (x86_64)
Kernel: Linux 6.12.38+deb12-amd64 (SMP w/16 CPU threads; PREEMPT)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_IE.UTF-8, LC_CTYPE=en_IE.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
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| From | "Debian Bug Tracking System" <owner@bugs.debian.org> |
|---|---|
| Date | 2025-08-03 05:20 +0200 |
| Subject | Processed: Re: Bug#1110193: r8169 Rx very slow; r8168 works fine |
| Message-ID | <Lfxqp-4KhK-11@gated-at.bofh.it> |
| In reply to | #88610 |
Processing control commands: > tag -1 moreinfo Bug #1110193 [src:linux] r8169 Rx very slow; r8168 works fine Added tag(s) moreinfo. -- 1110193: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1110193 Debian Bug Tracking System Contact owner@bugs.debian.org with problems
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| From | Ben Hutchings <ben@decadent.org.uk> |
|---|---|
| Date | 2025-08-03 05:20 +0200 |
| Message-ID | <Lfxqp-4KhK-1@gated-at.bofh.it> |
| In reply to | #88610 |
[Multipart message — attachments visible in raw view] — view raw
Control: tag -1 moreinfo Hi Colm, Long time no see! On Thu, 2025-07-31 at 16:22 +0100, Colm Buckley wrote: > Source: linux > Version: 6.12.38+deb12 > Severity: normal > X-Debbugs-Cc: colm@tuatha.org, nic_swsd@realtek.com, romieu@fr.zoreil.com, netdev@vger.kernel.org > > Dear Maintainer, > > Recent Debian kernels in the 6.12 series (in particular, from > 6.12.33+deb12-amd64 onwards, up to and including 6.12.38+deb12-amd64) > are causing serious slowdowns in receive performance on my (Realtek) > ethernet connection. Regardless of protocol or connection address, > read speed seems to be limited to between 5 and 10 Mb/s. > > Installing the r8168 module using r8168-dkms works fine, and read > speeds are up to 1000Mb/s as expected. > > The lspci output for this card is: [...] Please also provide: - output of "lspci -vnn -s 2c:00.0" (this shows numeric IDs as well as names) - the kernel log for a boot using the r8169 driver - the installed version of firmware-realtek (if any) (In future you should use "reportbug kernel" to report a bug in the running kernel, which will automatically such information in the report.) Ben. -- Ben Hutchings Experience is what causes a person to make new mistakes instead of old ones.
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