LinHES Forums :: View topic - IOBOUND errors and PCI Latency

root@backend:~# lspci -v
00:00.0 Memory controller: nVidia Corporation CK804 Memory Controller (rev a3)
Subsystem: ASUSTeK Computer Inc. Unknown device 815a
Flags: bus master, 66MHz, fast devsel, latency 0
Capabilities: [44] HyperTransport: Slave or Primary Interface
Capabilities: [e0] HyperTransport: MSI Mapping

00:01.0 ISA bridge: nVidia Corporation CK804 ISA Bridge (rev a3)
Subsystem: ASUSTeK Computer Inc. K8N4-E Mainboard
Flags: bus master, 66MHz, fast devsel, latency 0

00:01.1 SMBus: nVidia Corporation CK804 SMBus (rev a2)
Subsystem: ASUSTeK Computer Inc. K8N4-E Mainboard
Flags: 66MHz, fast devsel, IRQ 11
I/O ports at e400 [size=32]
I/O ports at 4c00 [size=64]
I/O ports at 4c40 [size=64]
Capabilities: [44] Power Management version 2

00:02.0 USB Controller: nVidia Corporation CK804 USB Controller (rev a2) (prog-if 10 [OHCI])
Subsystem: ASUSTeK Computer Inc. K8N4-E Mainboard
Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 16
Memory at cb004000 (32-bit, non-prefetchable) [size=4K]
Capabilities: [44] Power Management version 2

00:02.1 USB Controller: nVidia Corporation CK804 USB Controller (rev a3) (prog-if 20 [EHCI])
Subsystem: ASUSTeK Computer Inc. K8N4-E Mainboard
Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 19
Memory at feb00000 (32-bit, non-prefetchable) [size=256]
Capabilities: [44] Debug port
Capabilities: [80] Power Management version 2

00:04.0 Multimedia audio controller: nVidia Corporation CK804 AC'97 Audio Controller (rev a2)
Subsystem: ASUSTeK Computer Inc. K8N4-E Mainboard
Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 17
I/O ports at dc00 [size=256]
I/O ports at e000 [size=256]
Memory at cb003000 (32-bit, non-prefetchable) [size=4K]
Capabilities: [44] Power Management version 2

00:06.0 IDE interface: nVidia Corporation CK804 IDE (rev f2) (prog-if 8a [Master SecP PriP])
Subsystem: ASUSTeK Computer Inc. K8N4-E Mainboard
Flags: bus master, 66MHz, fast devsel, latency 0
I/O ports at f000 [size=16]
Capabilities: [44] Power Management version 2

00:07.0 IDE interface: nVidia Corporation CK804 Serial ATA Controller (rev f3) (prog-if 85 [Mast er SecO PriO])
Subsystem: ASUSTeK Computer Inc. Unknown device 815a
Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 17
I/O ports at 09f0 [size=8]
I/O ports at 0bf0 [size=4]
I/O ports at 0970 [size=8]
I/O ports at 0b70 [size=4]
I/O ports at d800 [size=16]
Memory at cb002000 (32-bit, non-prefetchable) [size=4K]
Capabilities: [44] Power Management version 2

00:08.0 IDE interface: nVidia Corporation CK804 Serial ATA Controller (rev f3) (prog-if 85 [Mast er SecO PriO])
Subsystem: ASUSTeK Computer Inc. K8N4-E Mainboard
Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 18
I/O ports at 09e0 [size=8]
I/O ports at 0be0 [size=4]
I/O ports at 0960 [size=8]
I/O ports at 0b60 [size=4]
I/O ports at c400 [size=16]
Memory at cb001000 (32-bit, non-prefetchable) [size=4K]
Capabilities: [44] Power Management version 2

00:09.0 PCI bridge: nVidia Corporation CK804 PCI Bridge (rev a2) (prog-if 01 [Subtractive decode ])
Flags: bus master, 66MHz, fast devsel, latency 0
Bus: primary=00, secondary=05, subordinate=05, sec-latency=128
Prefetchable memory behind bridge: c0000000-c7ffffff

00:0a.0 Bridge: nVidia Corporation CK804 Ethernet Controller (rev a3)
Subsystem: ASUSTeK Computer Inc. K8N4-E Mainboard
Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 16
Memory at cb000000 (32-bit, non-prefetchable) [size=4K]
I/O ports at b000 [size=8]
Capabilities: [44] Power Management version 2

00:0b.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev a3) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=04, subordinate=04, sec-latency=0
Capabilities: [40] Power Management version 2
Capabilities: [48] Message Signalled Interrupts: Mask- 64bit+ Queue=0/1 Enable-
Capabilities: [58] HyperTransport: MSI Mapping
Capabilities: [80] Express Root Port (Slot+) IRQ 0
Capabilities: [100] Virtual Channel

00:0c.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev a3) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=03, subordinate=03, sec-latency=0
Capabilities: [40] Power Management version 2
Capabilities: [48] Message Signalled Interrupts: Mask- 64bit+ Queue=0/1 Enable-
Capabilities: [58] HyperTransport: MSI Mapping
Capabilities: [80] Express Endpoint IRQ 0
Capabilities: [28] #00 [0000]
Capabilities: [100] Virtual Channel
Capabilities: [128] Power Budgeting

00:0d.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev a3) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
Capabilities: [40] Power Management version 2
Capabilities: [48] Message Signalled Interrupts: Mask- 64bit+ Queue=0/1 Enable-
Capabilities: [58] HyperTransport: MSI Mapping
Capabilities: [80] Express Root Port (Slot+) IRQ 0
Capabilities: [100] Virtual Channel

00:0e.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev a3) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
Memory behind bridge: c8000000-caffffff
Prefetchable memory behind bridge: 00000000b0000000-00000000bfffffff
Capabilities: [40] Power Management version 2
Capabilities: [48] Message Signalled Interrupts: Mask- 64bit+ Queue=0/1 Enable-
Capabilities: [58] HyperTransport: MSI Mapping
Capabilities: [80] Express Root Port (Slot+) IRQ 0
Capabilities: [100] Virtual Channel

00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technolog y Configuration
Flags: fast devsel
Capabilities: [80] HyperTransport: Host or Secondary Interface

00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map
Flags: fast devsel

00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller
Flags: fast devsel

00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control
Flags: fast devsel

01:00.0 VGA compatible controller: nVidia Corporation GeForce 7300 LE (rev a1) (prog-if 00 [VGA] )
Subsystem: ASUSTeK Computer Inc. Unknown device 81ff
Flags: bus master, fast devsel, latency 0, IRQ 21
Memory at c8000000 (32-bit, non-prefetchable) [size=16M]
Memory at b0000000 (64-bit, prefetchable) [size=256M]
Memory at c9000000 (64-bit, non-prefetchable) [size=16M]
[virtual] Expansion ROM at ca000000 [disabled] [size=128K]
Capabilities: [60] Power Management version 2
Capabilities: [68] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable-
Capabilities: [78] Express Endpoint IRQ 0
Capabilities: [100] Virtual Channel
Capabilities: [128] Power Budgeting

05:06.0 Multimedia video controller: Internext Compression Inc iTVC16 (CX23416) MPEG-2 Encoder ( rev 01)
Subsystem: Hauppauge computer works Inc. WinTV PVR 150
Flags: bus master, medium devsel, latency 64, IRQ 20
Memory at c0000000 (32-bit, prefetchable) [size=64M]
Capabilities: [44] Power Management version 2

05:08.0 Multimedia video controller: Internext Compression Inc iTVC16 (CX23416) MPEG-2 Encoder ( rev 01)
Subsystem: Hauppauge computer works Inc. WinTV PVR 150
Flags: bus master, medium devsel, latency 64, IRQ 21
Memory at c4000000 (32-bit, prefetchable) [size=64M]
Capabilities: [44] Power Management version 2

root@backend:~#

Author:	rando [ Mon Mar 12, 2007 2:07 pm ]
Post subject:	IOBOUND errors and PCI Latency - related to each other?
Ok, so, I've been poking around and tryin to dig up some more dirt on these IOBOUND messages I keep getting in my log files. I came across the following at the mythtv wiki. http://www.mythtv.org/wiki/index.php/Talk:PCI_Latency When I run a "lspci -v" this is what I get: Code: root@backend:~# lspci -v 00:00.0 Memory controller: nVidia Corporation CK804 Memory Controller (rev a3) Subsystem: ASUSTeK Computer Inc. Unknown device 815a Flags: bus master, 66MHz, fast devsel, latency 0 Capabilities: [44] HyperTransport: Slave or Primary Interface Capabilities: [e0] HyperTransport: MSI Mapping 00:01.0 ISA bridge: nVidia Corporation CK804 ISA Bridge (rev a3) Subsystem: ASUSTeK Computer Inc. K8N4-E Mainboard Flags: bus master, 66MHz, fast devsel, latency 0 00:01.1 SMBus: nVidia Corporation CK804 SMBus (rev a2) Subsystem: ASUSTeK Computer Inc. K8N4-E Mainboard Flags: 66MHz, fast devsel, IRQ 11 I/O ports at e400 [size=32] I/O ports at 4c00 [size=64] I/O ports at 4c40 [size=64] Capabilities: [44] Power Management version 2 00:02.0 USB Controller: nVidia Corporation CK804 USB Controller (rev a2) (prog-if 10 [OHCI]) Subsystem: ASUSTeK Computer Inc. K8N4-E Mainboard Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 16 Memory at cb004000 (32-bit, non-prefetchable) [size=4K] Capabilities: [44] Power Management version 2 00:02.1 USB Controller: nVidia Corporation CK804 USB Controller (rev a3) (prog-if 20 [EHCI]) Subsystem: ASUSTeK Computer Inc. K8N4-E Mainboard Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 19 Memory at feb00000 (32-bit, non-prefetchable) [size=256] Capabilities: [44] Debug port Capabilities: [80] Power Management version 2 00:04.0 Multimedia audio controller: nVidia Corporation CK804 AC'97 Audio Controller (rev a2) Subsystem: ASUSTeK Computer Inc. K8N4-E Mainboard Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 17 I/O ports at dc00 [size=256] I/O ports at e000 [size=256] Memory at cb003000 (32-bit, non-prefetchable) [size=4K] Capabilities: [44] Power Management version 2 00:06.0 IDE interface: nVidia Corporation CK804 IDE (rev f2) (prog-if 8a [Master SecP PriP]) Subsystem: ASUSTeK Computer Inc. K8N4-E Mainboard Flags: bus master, 66MHz, fast devsel, latency 0 I/O ports at f000 [size=16] Capabilities: [44] Power Management version 2 00:07.0 IDE interface: nVidia Corporation CK804 Serial ATA Controller (rev f3) (prog-if 85 [Mast er SecO PriO]) Subsystem: ASUSTeK Computer Inc. Unknown device 815a Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 17 I/O ports at 09f0 [size=8] I/O ports at 0bf0 [size=4] I/O ports at 0970 [size=8] I/O ports at 0b70 [size=4] I/O ports at d800 [size=16] Memory at cb002000 (32-bit, non-prefetchable) [size=4K] Capabilities: [44] Power Management version 2 00:08.0 IDE interface: nVidia Corporation CK804 Serial ATA Controller (rev f3) (prog-if 85 [Mast er SecO PriO]) Subsystem: ASUSTeK Computer Inc. K8N4-E Mainboard Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 18 I/O ports at 09e0 [size=8] I/O ports at 0be0 [size=4] I/O ports at 0960 [size=8] I/O ports at 0b60 [size=4] I/O ports at c400 [size=16] Memory at cb001000 (32-bit, non-prefetchable) [size=4K] Capabilities: [44] Power Management version 2 00:09.0 PCI bridge: nVidia Corporation CK804 PCI Bridge (rev a2) (prog-if 01 [Subtractive decode ]) Flags: bus master, 66MHz, fast devsel, latency 0 Bus: primary=00, secondary=05, subordinate=05, sec-latency=128 Prefetchable memory behind bridge: c0000000-c7ffffff 00:0a.0 Bridge: nVidia Corporation CK804 Ethernet Controller (rev a3) Subsystem: ASUSTeK Computer Inc. K8N4-E Mainboard Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 16 Memory at cb000000 (32-bit, non-prefetchable) [size=4K] I/O ports at b000 [size=8] Capabilities: [44] Power Management version 2 00:0b.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev a3) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=04, subordinate=04, sec-latency=0 Capabilities: [40] Power Management version 2 Capabilities: [48] Message Signalled Interrupts: Mask- 64bit+ Queue=0/1 Enable- Capabilities: [58] HyperTransport: MSI Mapping Capabilities: [80] Express Root Port (Slot+) IRQ 0 Capabilities: [100] Virtual Channel 00:0c.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev a3) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=03, subordinate=03, sec-latency=0 Capabilities: [40] Power Management version 2 Capabilities: [48] Message Signalled Interrupts: Mask- 64bit+ Queue=0/1 Enable- Capabilities: [58] HyperTransport: MSI Mapping Capabilities: [80] Express Endpoint IRQ 0 Capabilities: [28] #00 [0000] Capabilities: [100] Virtual Channel Capabilities: [128] Power Budgeting 00:0d.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev a3) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=02, subordinate=02, sec-latency=0 Capabilities: [40] Power Management version 2 Capabilities: [48] Message Signalled Interrupts: Mask- 64bit+ Queue=0/1 Enable- Capabilities: [58] HyperTransport: MSI Mapping Capabilities: [80] Express Root Port (Slot+) IRQ 0 Capabilities: [100] Virtual Channel 00:0e.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev a3) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=01, subordinate=01, sec-latency=0 Memory behind bridge: c8000000-caffffff Prefetchable memory behind bridge: 00000000b0000000-00000000bfffffff Capabilities: [40] Power Management version 2 Capabilities: [48] Message Signalled Interrupts: Mask- 64bit+ Queue=0/1 Enable- Capabilities: [58] HyperTransport: MSI Mapping Capabilities: [80] Express Root Port (Slot+) IRQ 0 Capabilities: [100] Virtual Channel 00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technolog y Configuration Flags: fast devsel Capabilities: [80] HyperTransport: Host or Secondary Interface 00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map Flags: fast devsel 00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller Flags: fast devsel 00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control Flags: fast devsel 01:00.0 VGA compatible controller: nVidia Corporation GeForce 7300 LE (rev a1) (prog-if 00 [VGA] ) Subsystem: ASUSTeK Computer Inc. Unknown device 81ff Flags: bus master, fast devsel, latency 0, IRQ 21 Memory at c8000000 (32-bit, non-prefetchable) [size=16M] Memory at b0000000 (64-bit, prefetchable) [size=256M] Memory at c9000000 (64-bit, non-prefetchable) [size=16M] [virtual] Expansion ROM at ca000000 [disabled] [size=128K] Capabilities: [60] Power Management version 2 Capabilities: [68] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable- Capabilities: [78] Express Endpoint IRQ 0 Capabilities: [100] Virtual Channel Capabilities: [128] Power Budgeting 05:06.0 Multimedia video controller: Internext Compression Inc iTVC16 (CX23416) MPEG-2 Encoder ( rev 01) Subsystem: Hauppauge computer works Inc. WinTV PVR 150 Flags: bus master, medium devsel, latency 64, IRQ 20 Memory at c0000000 (32-bit, prefetchable) [size=64M] Capabilities: [44] Power Management version 2 05:08.0 Multimedia video controller: Internext Compression Inc iTVC16 (CX23416) MPEG-2 Encoder ( rev 01) Subsystem: Hauppauge computer works Inc. WinTV PVR 150 Flags: bus master, medium devsel, latency 64, IRQ 21 Memory at c4000000 (32-bit, prefetchable) [size=64M] Capabilities: [44] Power Management version 2 root@backend:~# The only two devices that have a non-zero latency are my 2 PVR 150 cards. According to the wiki article above, this could be a problem and the solution there is to adjust the latency timer for other devices (specifically the IDE or SATA controller). So, I run the command as indicated and lo and behold, I experience the same problem of the value not actually taking. (I'm running an nForce4 board - Asus A8N5X). Code: root@backend:~# setpci -v -s 00:06.0 latency_timer=b0 00:06.0:0d b0 and again, here is the result of lspci -v: Code: 00:06.0 IDE interface: nVidia Corporation CK804 IDE (rev f2) (prog-if 8a [Master SecP PriP]) Subsystem: ASUSTeK Computer Inc. K8N4-E Mainboard Flags: bus master, 66MHz, fast devsel, latency 0 I/O ports at f000 [size=16] Capabilities: [44] Power Management version 2 Is there some other way to bump the latency on my IDE controller? Will bumping it actually take care of the IOBOUND messages that are coming up? Will adding a PCI IDE card resolve this as it sounds like something that's hitting just the onboard devices? Will trying to move my cards around so that I don't have one of the PVR 150s on the same bus as my IDE controller perhaps resolve this? Anybody have any input or suggestions?

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