Pavel Machek wrote:
EHCI maintainter (as given by MAINTAINERS) added to CC.
On Út 31-05-05 01:21:37, Rene Herman wrote:
[ internal IDE HDD slowdown after switching on external USB2 HDD ]
USB controller generating extra DMA load? Try rmmoding usb to see if
it goes away.
I was sceptical about this since the drive is idle (or even switched off
again) but I recompiled EHCI modular and rmmodding ehci_hcd does in fact
bring back my 50 MB/s:
: hdparm -t /dev/hda = 50 MB/s
1. modprobe ehci_hcd : hdparm -t /dev/hda = 50 MB/s
2. switch on USB2 drive : hdparm -t /dev/hda = 42 MB/s
3. switch off USB drive : hdparm -t /dev/hda = 42 MB/s
4. modprobe -r ehci_hcd : hdparm -t /dev/hda = 50 MB/s
There would not seem to be any extra DMA load with a drive that's idle
or switched off again though? Is the (VIA) USB2 controller playing bus
monopolizing tricks or something sinister like that? (the speed doesn't
drop immediately after loading ehci_hcd though, only after switching on
the USB2 HDD)
More detail --- it's a VIA VT6212L EHCI controller, on unshared IRQ3.
IDE0 is AMD756 on unshared IRQ14/15. The USB2 HDD does 30 MB/s (after a
hdparm -a 1024; with the default 256 it's 25MB/s) which I did think was
a very good speed.
lspci -vv attached, in case it's useful.
Many thanks in advance to anyone for any additional insight...
Rene.
00:00.0 Host bridge: Advanced Micro Devices [AMD] AMD-751 [Irongate] System Controller (rev 25)
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort+ >SERR- <PERR-
Latency: 120
Region 0: Memory at e8000000 (32-bit, prefetchable) [size=64M]
Region 1: Memory at efbff000 (32-bit, prefetchable) [size=4K]
Region 2: I/O ports at d800 [disabled] [size=4]
Capabilities: [a0] AGP version 1.0
Status: RQ=16 Iso- ArqSz=0 Cal=0 SBA+ ITACoh- GART64- HTrans- 64bit- FW- AGP3- Rate=x1,x2
Command: RQ=1 ArqSz=0 Cal=0 SBA+ AGP+ GART64- 64bit- FW- Rate=x2
00:01.0 PCI bridge: Advanced Micro Devices [AMD] AMD-751 [Irongate] AGP Bridge (rev 01) (prog-if 00 [Normal decode])
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B-
Status: Cap- 66Mhz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 120
Bus: primary=00, secondary=01, subordinate=01, sec-latency=32
I/O behind bridge: 0000a000-0000bfff
Memory behind bridge: efc00000-efcfffff
Prefetchable memory behind bridge: dfa00000-e7afffff
BridgeCtl: Parity- SERR+ NoISA- VGA+ MAbort- >Reset- FastB2B-
00:07.0 ISA bridge: Advanced Micro Devices [AMD] AMD-756 [Viper] ISA (rev 01)
Control: I/O+ Mem+ BusMaster+ SpecCycle+ MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap- 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 0
00:07.1 IDE interface: Advanced Micro Devices [AMD] AMD-756 [Viper] IDE (rev 07) (prog-if 8a [Master SecP PriP])
Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap- 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 32
Region 4: I/O ports at f000 [size=16]
00:07.3 Bridge: Advanced Micro Devices [AMD] AMD-756 [Viper] ACPI (rev 03)
Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
00:08.0 Multimedia audio controller: Cirrus Logic CS 4614/22/24 [CrystalClear SoundFusion Audio Accelerator] (rev 01)
Subsystem: TERRATEC Electronic GmbH: Unknown device 112e
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 64 (1000ns min, 6000ns max)
Interrupt: pin A routed to IRQ 10
Region 0: Memory at efffd000 (32-bit, non-prefetchable) [size=4K]
Region 1: Memory at efe00000 (32-bit, non-prefetchable) [size=1M]
Capabilities: [40] Power Management version 2
Flags: PMEClk+ DSI+ D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:09.0 USB Controller: VIA Technologies, Inc. VT6202 [USB 2.0 controller] (rev 61) (prog-if 00 [UHCI])
Subsystem: VIA Technologies, Inc. VT6202 [USB 2.0 controller]
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR+ FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 64, cache line size 08
Interrupt: pin A routed to IRQ 12
Region 4: I/O ports at da00 [size=32]
Capabilities: [80] Power Management version 2
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:09.1 USB Controller: VIA Technologies, Inc. VT6202 [USB 2.0 controller] (rev 61) (prog-if 00 [UHCI])
Subsystem: VIA Technologies, Inc. VT6202 [USB 2.0 controller]
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR+ FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 64, cache line size 08
Interrupt: pin B routed to IRQ 10
Region 4: I/O ports at dc00 [size=32]
Capabilities: [80] Power Management version 2
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:09.2 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 63) (prog-if 20 [EHCI])
Subsystem: VIA Technologies, Inc. USB 2.0
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR+ FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 64, cache line size 10
Interrupt: pin C routed to IRQ 3
Region 0: Memory at effffe00 (32-bit, non-prefetchable) [size=256]
Capabilities: [80] Power Management version 2
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:09.3 FireWire (IEEE 1394): NEC Corporation: Unknown device 00e7 (rev 01) (prog-if 10 [OHCI])
Subsystem: NEC Corporation: Unknown device 00ce
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR+ FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 64, cache line size 08
Interrupt: pin A routed to IRQ 12
Region 0: Memory at efffe000 (32-bit, non-prefetchable) [size=4K]
Capabilities: [60] Power Management version 2
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
00:0a.0 Ethernet controller: 3Com Corporation 3c905C-TX/TX-M [Tornado] (rev 74)
Subsystem: 3Com Corporation 3C905C-TX Fast Etherlink for PC Management NIC
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR+ FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 64 (2500ns min, 2500ns max), cache line size 08
Interrupt: pin A routed to IRQ 10
Region 0: I/O ports at de00 [size=128]
Region 1: Memory at efffff80 (32-bit, non-prefetchable) [size=128]
Expansion ROM at effc0000 [disabled] [size=128K]
Capabilities: [dc] Power Management version 2
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
Status: D0 PME-Enable- DSel=0 DScale=2 PME-
01:05.0 VGA compatible controller: ATI Technologies Inc Rage 128 RF/SG AGP (prog-if 00 [VGA])
Subsystem: ATI Technologies Inc: Unknown device 0048
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping+ SERR- FastB2B-
Status: Cap+ 66Mhz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 64 (2000ns min), cache line size 08
Interrupt: pin A routed to IRQ 12
Region 0: Memory at e0000000 (32-bit, prefetchable) [size=64M]
Region 1: I/O ports at b800 [size=256]
Region 2: Memory at efcfc000 (32-bit, non-prefetchable) [size=16K]
Expansion ROM at efcc0000 [disabled] [size=128K]
Capabilities: [50] AGP version 2.0
Status: RQ=32 Iso- ArqSz=0 Cal=0 SBA+ ITACoh- GART64- HTrans- 64bit- FW- AGP3- Rate=x1,x2
Command: RQ=16 ArqSz=0 Cal=0 SBA+ AGP+ GART64- 64bit- FW- Rate=x2
Capabilities: [5c] Power Management version 1
Flags: PMEClk- DSI- D1+ D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
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