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Date: Sun, 10 May 2009 10:10:27 -0500
From: "Michael S. Zick" <lkml@...ethan.org>
To: linux-kernel@...r.kernel.org
Cc: Michael Riepe <michael.riepe@...glemail.com>
Subject: Re: 2.6.27.19 + 28.7: network timeouts for r8169 and 8139too
On Sun May 10 2009, Michael S. Zick wrote:
> On Sun May 10 2009, Michael Riepe wrote:
> >
> > Michael Buesch wrote:
> >
> > > I'm currently testing 2.6.29.1 without any additional patches but
> > > with the pci=nomsi boot option.
> > >
> > > I didn't notice any hickups, yet. I'm running a stresstest on a GBit link for quite
> > > some time now. Earlier tests with older kernels and MSI burped earlier.
> > >
>
> I can confirm greater through-put and reduced cpu usage with pci=nomsi
> on different hardware.
>
> Machine: Everex Cloudbook (ce1200v)
> HICS: Via CX700
> PCI-to-PCIe bridge, Via 1106:324B
> (only) Downstream device: HD Audio Controller, Via 1106:3288
>
> Kernel: 2.6.30-rc5 (git repo)
>
> No extensive benchmarking required here - you can hear the difference!
>
> 00:13.1 PCI bridge [0604]: VIA Technologies, Inc. CX700/VX700 PCI to PCI Bridge [1106:324a]
> 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
> Bus: primary=00, secondary=03, subordinate=03, sec-latency=0
> I/O behind bridge: 00005000-00005fff
> Memory behind bridge: d1100000-d11fffff
> Prefetchable memory behind bridge: 00000000fff00000-00000000000fffff
> Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- <SERR- <PERR-
> BridgeCtl: Parity- SERR- NoISA+ VGA- MAbort- >Reset- FastB2B-
> PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
>
Ooops - cut&paste error
00:13.0 PCI bridge [0604]: VIA Technologies, Inc. CX700/VX700 Host Bridge [1106:324b]
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
Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
I/O behind bridge: 0000f000-00000fff
Memory behind bridge: d1000000-d10fffff
Prefetchable memory behind bridge: 00000000fff00000-00000000000fffff
Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- <SERR- <PERR-
BridgeCtl: Parity- SERR- NoISA+ VGA- MAbort- >Reset- FastB2B-
PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
Mike
> 02:01.0 Audio device [0403]: VIA Technologies, Inc. VT1708/A [Azalia HDAC] (VIA High Definition Audio Controller) [1106:3288] (rev 10)
> Subsystem: FIRST INTERNATIONAL Computer Inc Device [1509:2f07]
> 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: 32 bytes
> Interrupt: pin A routed to IRQ 17
> Region 0: Memory at d1000000 (64-bit, non-prefetchable) [size=16K]
> Capabilities: [50] Power Management version 2
> Flags: PMEClk- DSI- D1- D2- AuxCurrent=55mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
> Status: D0 PME-Enable- DSel=0 DScale=0 PME-
> Capabilities: [60] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable-
> Address: 0000000000000000 Data: 0000
> Capabilities: [70] Express (v1) Root Complex Integrated Endpoint, MSI 00
> DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <64ns, L1 <1us
> ExtTag- RBE- FLReset-
> DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
> RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop-
> MaxPayload 128 bytes, MaxReadReq 128 bytes
> DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr+ TransPend+
> LnkCap: Port #0, Speed unknown, Width x0, ASPM unknown, Latency L0 <64ns, L1 <1us
> ClockPM- Suprise- LLActRep- BwNot-
> LnkCtl: ASPM Disabled; Disabled- Retrain- CommClk-
> ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
> LnkSta: Speed unknown, Width x0, TrErr- Train- SlotClk- DLActive- BWMgmt- ABWMgmt-
> Kernel driver in use: HDA Intel
>
> Mike
> > > I will do more testing. If it turns out this is stable I will test the same kernel
> > > with Message Signaled Interrupts to see if that causes some breakage.
> >
> > I've had this problem up to and including 2.6.29.2. Currently, I'm
> > trying 2.6.29.2 with pci=nomsi, and it's stable so far. With MSI
> > enabled, a single high-speed TCP transfer will stop after a few seconds,
> > but without MSI, I can run four simultaneous transfers to two different
> > hosts without a single hickup.
> >
> > It seems to me that this particular chip really doesn't like MSI.
> >
> > Kernel: 2.6.29.2 (x86_64)
> > Board: Intel D945GCLF2
> > BIOS version: LF94510J.86A.0099.2008.0731.0303
> >
> > lspci -vv:
> > 01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
> > RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 02)
> > Subsystem: Intel Corporation Device 0001
> > 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 16
> > Region 0: I/O ports at 1000 [size=256]
> > Region 2: Memory at 90100000 (64-bit, non-prefetchable) [size=4K]
> > Region 4: Memory at 90000000 (64-bit, prefetchable) [size=64K]
> > Expansion ROM at 90020000 [disabled] [size=128K]
> > Capabilities: [40] Power Management version 3
> > Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA
> > PME(D0+,D1+,D2+,D3hot+,D3cold+)
> > Status: D0 PME-Enable- DSel=0 DScale=0 PME-
> > Capabilities: [50] MSI: Mask- 64bit+ Count=1/1 Enable-
> > Address: 0000000000000000 Data: 0000
> > Capabilities: [70] Express (v1) Endpoint, MSI 01
> > DevCap: MaxPayload 256 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-
> > MaxPayload 128 bytes, MaxReadReq 4096 bytes
> > DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr+
> > TransPend-
> > LnkCap: Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1,
> > Latency L0 <512ns, L1 <64us
> > ClockPM+ Suprise- LLActRep- BwNot-
> > LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain-
> > CommClk+
> > ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
> > LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+
> > DLActive- BWMgmt- ABWMgmt-
> > Capabilities: [b0] MSI-X: Enable- Mask- TabSize=2
> > Vector table: BAR=4 offset=00000000
> > PBA: BAR=4 offset=00000800
> > Capabilities: [d0] Vital Product Data <?>
> > Kernel driver in use: r8169
> > Kernel modules: r8169
> >
>
>
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