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    SubjectPROBLEM: megaraid2 performance problems with 2.4.32
    From
    Date

    Sorry to send this mail to so many people. Feel free to ignore this if
    you don't think it's appropriate for you.

    [1.] One line summary of the problem:

    The megaraid2 driver from the 2.4.32 kernel has horrible performance
    compared to the 2.4.31 one.

    [2.] Full description of the problem/report:

    When upgrading kernels we noticed a steep drop in transfer rate from our
    scsi tape to our scsi disk (all non-raid (raid 0 logical devices) but
    using the Dell MegaRAID 518 DELL PERC 4/DC RAID Controller). The
    performance drops from 24MByte/second to ** 2MByte/second when
    performing a restore (tar) from tape to disk.

    Our kernels are patched with the ghosting patch
    (http://www.kernel.org/pub/linux/daemons/autofs/v4/autofs4-2.4.29-20050404.patch) and an ipmi patch (http://linux.dell.com/files/ipmi/ipmi_kcs_drv.patch). I believe both patches are irrelevant to these problems.

    We tested with 2.4.31 (with mentioned patches) and the performance is
    ok. With 2.4.32 the performance is bad. Copying
    drivers/scsi/megaraid2.[ch] from 2.4.31 to 2.4.32 results is a usable
    kernel with ok performance.

    [3.] Keywords (i.e., modules, networking, kernel):

    megaraid2, 2.4.32

    [4.] Kernel version (from /proc/version):

    Linux version 2.4.32-exp (root@turin) (gcc version 3.3.5 (Debian 1:3.3.5-13)) #1 SMP Mon Jan 9 14:51:07 CET 2006

    [5.] Output of Oops.. message (if applicable) with symbolic information
    resolved (see Documentation/oops-tracing.txt)
    n/a

    [6.] A small shell script or example program which triggers the
    problem (if possible)

    Two test runs transferring 10GByte of data. These results were done on
    2.4.31 and 2.4.32 kernels with identical .config and building tools. The
    filesystem type used was reiserfs. Activity on the system was comparable
    with all tests (not single user mode though).

    ** 2.4.31 kernel tests

    # uname -r
    2.4.31-pe1850
    # rm -f test.file
    # time dd if=/dev/zero of=test.file bs=32k count=327680
    327680+0 records in
    327680+0 records out
    10737418240 bytes transferred in 199.794846 seconds (53742218 bytes/sec)

    real 3m19.796s
    user 0m0.290s
    sys 0m50.520s
    # mt -f /dev/st0 rewind ; mt -f /dev/nst0 fsf 1
    # time dd if=/dev/nst0 of=/dev/null bs=32k count=327680
    327680+0 records in
    327680+0 records out
    10737418240 bytes transferred in 250.968109 seconds (42783995 bytes/sec)

    real 4m10.977s
    user 0m0.220s
    sys 0m4.090s
    # mt -f /dev/st0 rewind ; mt -f /dev/nst0 fsf 1
    rm -f test.file
    # rm -f test.file
    # time dd if=/dev/nst0 of=test.file bs=32k count=327680
    327680+0 records in
    327680+0 records out
    10737418240 bytes transferred in 422.225318 seconds (25430541 bytes/sec)

    real 7m2.235s
    user 0m0.270s
    sys 0m50.590s

    ** 2.4.32 kernel tests

    # uname -r
    2.4.32-pe1850
    # rm -f test.file
    g# time dd if=/dev/zero of=test.file bs=32k count=327680
    327680+0 records in
    327680+0 records out
    10737418240 bytes transferred in 210.005062 seconds (51129331 bytes/sec)

    real 3m30.006s
    user 0m0.270s
    sys 0m49.850s
    # mt -f /dev/st0 rewind ; mt -f /dev/nst0 fsf 1
    # time dd if=/dev/nst0 of=/dev/null bs=32k count=327680
    327680+0 records in
    327680+0 records out
    10737418240 bytes transferred in 4967.018522 seconds (2161743 bytes/sec)

    real 82m47.072s
    user 0m0.200s
    sys 0m3.640s

    (the tape to disk test was skipped, if it's really relevant I can rerun
    the test)

    And in friendly table format:

    2.4.31 disk tape tape->disk
    rate 51.3M/s 40.8M/s 24.3M/s
    real time 3m19.796s 4m10.977s 7m2.235s
    user time 0m0.290s 0m0.220s 0m0.270s
    sys time 0m50.520s 0m4.090s 0m50.590s

    2.4.32 disk tape tape->disk
    rate 48.8M/s 2.0M/s
    real time 3m30.006s 82m47.072s
    user time 0m0.270s 0m0.200s
    sys time 0m49.850s 0m3.640s


    [7.] Environment
    [7.1.] Software (add the output of the ver_linux script here)

    Linux turin 2.4.32-exp #1 SMP Mon Jan 9 14:51:07 CET 2006 i686 GNU/Linux

    Gnu C 3.3.5
    Gnu make 3.80
    util-linux 2.12p
    mount 2.12p
    modutils 2.4.26
    e2fsprogs 1.37
    Linux C Library 2.3.2
    Dynamic linker (ldd) 2.3.2
    Procps 3.2.1
    Net-tools 1.60
    Console-tools 0.2.3
    Sh-utils 5.2.1
    Modules Loaded st nfsd autofs4 nfs lockd sunrpc i810_rng
    ehci-hcd usb-uhci usbcore ide-scsi e1000 ipmi_devintf ipmi_kcs_drv
    ipmi_msghandler ipv6 i2c-proc i2c-core ide-disk ide-detect ide-cd cdrom
    ide-core unix

    [7.2.] Processor information (from /proc/cpuinfo):

    processor : 0
    vendor_id : GenuineIntel
    cpu family : 15
    model : 4
    model name : Intel(R) Xeon(TM) CPU 2.80GHz
    stepping : 3
    cpu MHz : 2793.274
    cache size : 16 KB
    fdiv_bug : no
    hlt_bug : no
    f00f_bug : no
    coma_bug : no
    fpu : yes
    fpu_exception : yes
    cpuid level : 5
    wp : yes
    flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
    mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm
    pni monitor ds_cpl cid
    bogomips : 5570.56

    processor : 1
    vendor_id : GenuineIntel
    cpu family : 15
    model : 4
    model name : Intel(R) Xeon(TM) CPU 2.80GHz
    stepping : 3
    cpu MHz : 2793.274
    cache size : 16 KB
    fdiv_bug : no
    hlt_bug : no
    f00f_bug : no
    coma_bug : no
    fpu : yes
    fpu_exception : yes
    cpuid level : 5
    wp : yes
    flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
    mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm
    pni monitor ds_cpl cid
    bogomips : 5583.66

    processor : 2
    vendor_id : GenuineIntel
    cpu family : 15
    model : 4
    model name : Intel(R) Xeon(TM) CPU 2.80GHz
    stepping : 3
    cpu MHz : 2793.274
    cache size : 16 KB
    fdiv_bug : no
    hlt_bug : no
    f00f_bug : no
    coma_bug : no
    fpu : yes
    fpu_exception : yes
    cpuid level : 5
    wp : yes
    flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
    mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm
    pni monitor ds_cpl cid
    bogomips : 5583.66

    processor : 3
    vendor_id : GenuineIntel
    cpu family : 15
    model : 4
    model name : Intel(R) Xeon(TM) CPU 2.80GHz
    stepping : 3
    cpu MHz : 2793.274
    cache size : 16 KB
    fdiv_bug : no
    hlt_bug : no
    f00f_bug : no
    coma_bug : no
    fpu : yes
    fpu_exception : yes
    cpuid level : 5
    wp : yes
    flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
    mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm
    pni monitor ds_cpl cid
    bogomips : 5583.66

    [7.3.] Module information (from /proc/modules):

    st 29560 0 (autoclean)
    nfsd 74032 8 (autoclean)
    autofs4 13112 6
    nfs 77240 3 (autoclean)
    lockd 49744 1 (autoclean) [nfsd nfs]
    sunrpc 74272 1 (autoclean) [nfsd nfs lockd]
    i810_rng 2788 0 (unused)
    ehci-hcd 18956 0 (unused)
    usb-uhci 24176 0 (unused)
    usbcore 66188 1 [ehci-hcd usb-uhci]
    ide-scsi 10320 0
    e1000 74380 1
    ipmi_devintf 3752 0 (unused)
    ipmi_kcs_drv 10121 0 (unused)
    ipmi_msghandler 14152 0 [ipmi_devintf ipmi_kcs_drv]
    ipv6 218772 -1
    i2c-proc 6704 0 (unused)
    i2c-core 13860 0 [i2c-proc]
    ide-disk 15904 0
    ide-detect 288 0 (unused)
    ide-cd 31264 0
    cdrom 29696 0 [ide-cd]
    ide-core 111352 0 [ide-scsi ide-disk ide-detect ide-cd]
    unix 16976 21 (autoclean)

    [7.4.] Loaded driver and hardware information
    (/proc/ioports, /proc/iomem)

    /proc/ioports:
    0000-001f : dma1
    0020-003f : pic1
    0040-0043 : timer0
    0050-0053 : timer1
    0060-006f : keyboard
    0080-008f : dma page reg
    00a0-00bf : pic2
    00c0-00df : dma2
    00f0-00ff : fpu
    01f0-01f7 : ide0
    03c0-03df : vga+
    03f6-03f6 : ide0
    03f8-03ff : serial(auto)
    0800-0803 : PM1a_EVT_BLK
    0804-0805 : PM1a_CNT_BLK
    0808-080b : PM_TMR
    0828-082f : GPE0_BLK
    0ca8-0ca8 : ipmi_kcs
    0cac-0cac : ipmi_kcs
    0cf8-0cff : PCI conf1
    bca0-bcbf : Intel Corp. 82801EB USB
    bca0-bcbf : usb-uhci
    bcc0-bcdf : Intel Corp. 82801EB USB
    bcc0-bcdf : usb-uhci
    bce0-bcff : Intel Corp. 82801EB USB
    bce0-bcff : usb-uhci
    cc00-ccff : ATI Technologies Inc Radeon RV100 QY [Radeon 7000/VE]
    d000-efff : PCI Bus #05
    d000-dfff : PCI Bus #07
    dcc0-dcff : PCI device 8086:1076 (Intel Corp.)
    dcc0-dcff : e1000
    e000-efff : PCI Bus #06
    ecc0-ecff : PCI device 8086:1076 (Intel Corp.)
    ecc0-ecff : e1000
    fc00-fc0f : Intel Corp. 82801EB Ultra ATA Storage Controller

    /proc/iomem:
    00000000-0009ffff : System RAM
    000a0000-000bffff : Video RAM area
    000c0000-000c7fff : Video ROM
    000cb000-000cbfff : Extension ROM
    000cc000-000ccfff : Extension ROM
    000cd000-000cf1ff : Extension ROM
    000cf800-000d1dff : Extension ROM
    000f0000-000fffff : System ROM
    00100000-3ffbffff : System RAM
    00100000-0028dde7 : Kernel code
    0028dde8-00319f23 : Kernel data
    3ffc0000-3ffcfbff : ACPI Tables
    3ffcfc00-3fffefff : reserved
    3ffff000-3ffff3ff : Intel Corp. 82801EB Ultra ATA Storage Controller
    e0000000-efffffff : reserved
    f0000000-f7ffffff : ATI Technologies Inc Radeon RV100 QY [Radeon 7000/VE]
    f8000000-f81fffff : PCI Bus #01
    f8000000-f80fffff : PCI Bus #03
    f80f0000-f80fffff : LSI Logic / Symbios Logic PowerEdge Expandable RAID Controller 4
    f80f0000-f80f007f : MegaRAID: LSI Logic Corporation.
    f8100000-f81fffff : PCI Bus #02
    f81f0000-f81fffff : PCI device 1028:0013 (Dell Computer Corporation)
    f81f0000-f81f007f : MegaRAID: LSI Logic Corporation.
    fe0f0000-fe0fffff : ATI Technologies Inc Radeon RV100 QY [Radeon 7000/VE]
    fe200000-fe6fffff : PCI Bus #05
    fe300000-fe4fffff : PCI Bus #07
    fe3e0000-fe3fffff : PCI device 8086:1076 (Intel Corp.)
    fe3e0000-fe3fffff : e1000
    fe500000-fe6fffff : PCI Bus #06
    fe5e0000-fe5fffff : PCI device 8086:1076 (Intel Corp.)
    fe5e0000-fe5fffff : e1000
    fe700000-feafffff : PCI Bus #01
    fe800000-fe8fffff : PCI Bus #03
    fe900000-feafffff : PCI Bus #02
    fe9e0000-fe9fffff : PCI device 1028:0013 (Dell Computer Corporation)
    feb00000-feb003ff : Intel Corp. 82801EB USB2
    feb00000-feb003ff : ehci_hcd
    fec00000-fec8ffff : reserved
    fed00000-fed003ff : reserved
    fee00000-fee0ffff : reserved
    ffb00000-ffffffff : reserved

    [7.5.] PCI information ('lspci -vvv' as root)

    0000:00:00.0 Host bridge: Intel Corp. Server Memory Controller Hub (rev 09)
    Subsystem: Dell: Unknown device 016c
    Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR+ FastB2B-
    Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR-
    Latency: 0
    Capabilities: [40] #09 [4105]

    0000:00:02.0 PCI bridge: Intel Corp. Memory Controller Hub PCI Express Port A0 (rev 09) (prog-if 00 [Normal decode])
    Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR- FastB2B-
    Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR-
    Latency: 0, Cache Line Size: 0x10 (64 bytes)
    Bus: primary=00, secondary=01, subordinate=03, sec-latency=0
    I/O behind bridge: 0000f000-00000fff
    Memory behind bridge: fe700000-feafffff
    Prefetchable memory behind bridge: 00000000f8000000-00000000f8100000
    Secondary status: SERR
    BridgeCtl: Parity+ SERR+ NoISA+ VGA- MAbort- >Reset- FastB2B-
    Capabilities: [50] 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-
    Capabilities: [58] Message Signalled Interrupts: 64bit- Queue=0/1 Enable-
    Address: fee00000 Data: 0000
    Capabilities: [64] #10 [0041]

    0000:00:04.0 PCI bridge: Intel Corp. Memory Controller Hub PCI Express Port B0 (rev 09) (prog-if 00 [Normal decode])
    Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR- FastB2B-
    Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR-
    Latency: 0, Cache Line Size: 0x10 (64 bytes)
    Bus: primary=00, secondary=04, subordinate=04, sec-latency=0
    I/O behind bridge: 0000f000-00000fff
    Memory behind bridge: fff00000-000fffff
    Prefetchable memory behind bridge: 00000000fff00000-0000000000000000
    BridgeCtl: Parity+ SERR+ NoISA+ VGA- MAbort- >Reset- FastB2B-
    Capabilities: [50] 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-
    Capabilities: [58] Message Signalled Interrupts: 64bit- Queue=0/1 Enable-
    Address: fee00000 Data: 0000
    Capabilities: [64] #10 [0041]

    0000:00:05.0 PCI bridge: Intel Corp. Memory Controller Hub PCI Express Port B1 (rev 09) (prog-if 00 [Normal decode])
    Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR- FastB2B-
    Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR-
    Latency: 0, Cache Line Size: 0x10 (64 bytes)
    Bus: primary=00, secondary=05, subordinate=07, sec-latency=0
    I/O behind bridge: 0000d000-0000efff
    Memory behind bridge: fe200000-fe6fffff
    Prefetchable memory behind bridge: 00000000fff00000-0000000000000000
    Secondary status: SERR
    BridgeCtl: Parity+ SERR+ NoISA+ VGA- MAbort- >Reset- FastB2B-
    Capabilities: [50] 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-
    Capabilities: [58] Message Signalled Interrupts: 64bit- Queue=0/1 Enable-
    Address: fee00000 Data: 0000
    Capabilities: [64] #10 [0041]

    0000:00:06.0 PCI bridge: Intel Corp. Memory Controller Hub PCI Express Port C0 (rev 09) (prog-if 00 [Normal decode])
    Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR- FastB2B-
    Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR-
    Latency: 0, Cache Line Size: 0x10 (64 bytes)
    Bus: primary=00, secondary=08, subordinate=08, sec-latency=0
    I/O behind bridge: 0000f000-00000fff
    Memory behind bridge: fff00000-000fffff
    Prefetchable memory behind bridge: 00000000fff00000-0000000000000000
    BridgeCtl: Parity+ SERR+ NoISA+ VGA- MAbort- >Reset- FastB2B-
    Capabilities: [50] 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-
    Capabilities: [58] Message Signalled Interrupts: 64bit- Queue=0/1 Enable-
    Address: fee00000 Data: 0000
    Capabilities: [64] #10 [0041]

    0000:00:1d.0 USB Controller: Intel Corp. 82801EB/ER (ICH5/ICH5R) USB UHCI #1 (rev 02) (prog-if 00 [UHCI])
    Subsystem: Dell: Unknown device 016c
    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
    Interrupt: pin A routed to IRQ 16
    Region 4: I/O ports at bce0 [size=32]

    0000:00:1d.1 USB Controller: Intel Corp. 82801EB/ER (ICH5/ICH5R) USB UHCI #2 (rev 02) (prog-if 00 [UHCI])
    Subsystem: Dell: Unknown device 016c
    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
    Interrupt: pin B routed to IRQ 19
    Region 4: I/O ports at bcc0 [size=32]

    0000:00:1d.2 USB Controller: Intel Corp. 82801EB/ER (ICH5/ICH5R) USB UHCI #3 (rev 02) (prog-if 00 [UHCI])
    Subsystem: Dell: Unknown device 016c
    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
    Interrupt: pin C routed to IRQ 18
    Region 4: I/O ports at bca0 [size=32]

    0000:00:1d.7 USB Controller: Intel Corp. 82801EB/ER (ICH5/ICH5R) USB2 EHCI Controller (rev 02) (prog-if 20 [EHCI])
    Subsystem: Dell: Unknown device 016c
    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
    Interrupt: pin D routed to IRQ 23
    Region 0: Memory at feb00000 (32-bit, non-prefetchable) [size=1K]
    Capabilities: [50] 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-
    Capabilities: [58] #0a [20a0]

    0000:00:1e.0 PCI bridge: Intel Corp. 82801 PCI Bridge (rev c2) (prog-if 00 [Normal decode])
    Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR+ FastB2B-
    Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR-
    Latency: 0
    Bus: primary=00, secondary=09, subordinate=09, sec-latency=32
    I/O behind bridge: 0000c000-0000cfff
    Memory behind bridge: fe000000-fe1fffff
    Prefetchable memory behind bridge: f0000000-f7ffffff
    BridgeCtl: Parity+ SERR+ NoISA- VGA+ MAbort- >Reset- FastB2B-

    0000:00:1f.0 ISA bridge: Intel Corp. 82801EB/ER (ICH5/ICH5R) LPC Bridge (rev 02)
    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

    0000:00:1f.1 IDE interface: Intel Corp. 82801EB/ER (ICH5/ICH5R) Ultra ATA 100 Storage Controller (rev 02) (prog-if 8a [Master SecP PriP])
    Subsystem: Dell: Unknown device 016c
    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
    Interrupt: pin A routed to IRQ 0
    Region 0: I/O ports at <unassigned>
    Region 1: I/O ports at <unassigned>
    Region 2: I/O ports at <unassigned>
    Region 3: I/O ports at <unassigned>
    Region 4: I/O ports at fc00 [size=16]
    Region 5: Memory at 3ffff000 (32-bit, non-prefetchable) [disabled] [size=1K]

    0000:01:00.0 PCI bridge: Intel Corp. 80332 [Dobson] I/O processor (rev 06) (prog-if 00 [Normal decode])
    Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR- FastB2B-
    Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR-
    Latency: 0, Cache Line Size: 0x10 (64 bytes)
    Bus: primary=01, secondary=02, subordinate=02, sec-latency=64
    I/O behind bridge: 0000f000-00000fff
    Memory behind bridge: fe900000-feafffff
    Prefetchable memory behind bridge: 00000000f8100000-00000000f8100000
    BridgeCtl: Parity+ SERR+ NoISA+ VGA- MAbort- >Reset- FastB2B-
    Capabilities: [44] #10 [0071]
    Capabilities: [5c] Message Signalled Interrupts: 64bit+ Queue=0/0 Enable-
    Address: 0000000000000000 Data: 0000
    Capabilities: [6c] 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-
    Capabilities: [d8] PCI-X bridge device.
    Secondary Status: 64bit+, 133MHz+, SCD-, USC-, SCO-, SRD- Freq=2
    Status: Bus=1 Dev=0 Func=0 64bit- 133MHz- SCD- USC-, SCO-, SRD-
    : Upstream: Capacity=65535, Commitment Limit=65535
    : Downstream: Capacity=65535, Commitment Limit=65535

    0000:01:00.2 PCI bridge: Intel Corp. 80332 [Dobson] I/O processor (rev 06) (prog-if 00 [Normal decode])
    Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR- FastB2B-
    Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR-
    Latency: 0, Cache Line Size: 0x10 (64 bytes)
    Bus: primary=01, secondary=03, subordinate=03, sec-latency=32
    I/O behind bridge: 0000f000-00000fff
    Memory behind bridge: fe800000-fe8fffff
    Prefetchable memory behind bridge: 00000000f8000000-00000000f8000000
    BridgeCtl: Parity+ SERR+ NoISA+ VGA- MAbort- >Reset- FastB2B-
    Capabilities: [44] #10 [0071]
    Capabilities: [5c] Message Signalled Interrupts: 64bit+ Queue=0/0 Enable-
    Address: 0000000000000000 Data: 0000
    Capabilities: [6c] 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-
    Capabilities: [d8] PCI-X bridge device.
    Secondary Status: 64bit+, 133MHz+, SCD-, USC-, SCO-, SRD- Freq=0
    Status: Bus=1 Dev=0 Func=2 64bit- 133MHz- SCD- USC-, SCO-, SRD-
    : Upstream: Capacity=65535, Commitment Limit=65535
    : Downstream: Capacity=65535, Commitment Limit=65535

    0000:02:0e.0 RAID bus controller: Dell PowerEdge Expandable RAID controller 4 (rev 06)
    Subsystem: Dell PowerEdge Expandable RAID Controller 4e/Si
    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 (32000ns min), Cache Line Size: 0x10 (64 bytes)
    Interrupt: pin A routed to IRQ 46
    Region 0: Memory at f81f0000 (32-bit, prefetchable) [size=64K]
    Region 2: Memory at fe9e0000 (32-bit, non-prefetchable) [size=128K]
    Expansion ROM at fea00000 [disabled] [size=128K]
    Capabilities: [c0] 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-
    Capabilities: [d0] Message Signalled Interrupts: 64bit+ Queue=0/1 Enable-
    Address: 0000000000000000 Data: 0000
    Capabilities: [e0] PCI-X non-bridge device.
    Command: DPERE- ERO- RBC=0 OST=3
    Status: Bus=2 Dev=14 Func=0 64bit+ 133MHz+ SCD- USC-, DC=bridge, DMMRBC=1, DMOST=3, DMCRS=1, RSCEM-

    0000:03:0b.0 RAID bus controller: LSI Logic / Symbios Logic MegaRAID (rev 01)
    Subsystem: Dell MegaRAID 518 DELL PERC 4/DC RAID Controller
    Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR+ FastB2B-
    Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=slow >TAbort- <TAbort- <MAbort- >SERR- <PERR-
    Latency: 32, Cache Line Size: 0x10 (64 bytes)
    Interrupt: pin A routed to IRQ 37
    Region 0: Memory at f80f0000 (32-bit, prefetchable) [size=64K]
    Expansion ROM at fe800000 [disabled] [size=64K]
    Capabilities: [80] 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-

    0000:05:00.0 PCI bridge: Intel Corp. PCI Bridge Hub A (rev 09) (prog-if 00 [Normal decode])
    Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR- FastB2B-
    Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR-
    Latency: 0, Cache Line Size: 0x10 (64 bytes)
    Bus: primary=05, secondary=06, subordinate=06, sec-latency=32
    I/O behind bridge: 0000e000-0000efff
    Memory behind bridge: fe500000-fe6fffff
    Prefetchable memory behind bridge: 00000000fff00000-0000000000000000
    BridgeCtl: Parity+ SERR+ NoISA+ VGA- MAbort- >Reset- FastB2B-
    Capabilities: [44] #10 [0071]
    Capabilities: [5c] Message Signalled Interrupts: 64bit+ Queue=0/0 Enable-
    Address: 0000000000000000 Data: 0000
    Capabilities: [6c] 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-
    Capabilities: [d8] PCI-X bridge device.
    Secondary Status: 64bit+, 133MHz+, SCD-, USC-, SCO-, SRD- Freq=0
    Status: Bus=5 Dev=0 Func=0 64bit- 133MHz- SCD- USC-, SCO-, SRD-
    : Upstream: Capacity=65535, Commitment Limit=65535
    : Downstream: Capacity=65535, Commitment Limit=65535

    0000:05:00.2 PCI bridge: Intel Corp. PCI Bridge Hub B (rev 09) (prog-if 00 [Normal decode])
    Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR- FastB2B-
    Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR-
    Latency: 0, Cache Line Size: 0x10 (64 bytes)
    Bus: primary=05, secondary=07, subordinate=07, sec-latency=32
    I/O behind bridge: 0000d000-0000dfff
    Memory behind bridge: fe300000-fe4fffff
    Prefetchable memory behind bridge: 00000000fff00000-0000000000000000
    BridgeCtl: Parity+ SERR+ NoISA+ VGA- MAbort- >Reset- FastB2B-
    Capabilities: [44] #10 [0071]
    Capabilities: [5c] Message Signalled Interrupts: 64bit+ Queue=0/0 Enable-
    Address: 0000000000000000 Data: 0000
    Capabilities: [6c] 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-
    Capabilities: [d8] PCI-X bridge device.
    Secondary Status: 64bit+, 133MHz+, SCD-, USC-, SCO-, SRD- Freq=0
    Status: Bus=5 Dev=0 Func=2 64bit- 133MHz- SCD- USC-, SCO-, SRD-
    : Upstream: Capacity=65535, Commitment Limit=65535
    : Downstream: Capacity=65535, Commitment Limit=65535

    0000:06:07.0 Ethernet controller: Intel Corp. 82541GI/PI Gigabit Ethernet Controller (rev 05)
    Subsystem: Dell: Unknown device 016d
    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 (63750ns min), Cache Line Size: 0x10 (64 bytes)
    Interrupt: pin A routed to IRQ 64
    Region 0: Memory at fe5e0000 (32-bit, non-prefetchable) [size=128K]
    Region 2: I/O ports at ecc0 [size=64]
    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=1 PME-
    Capabilities: [e4] PCI-X non-bridge device.
    Command: DPERE- ERO+ RBC=0 OST=0
    Status: Bus=0 Dev=0 Func=0 64bit- 133MHz- SCD- USC-, DC=simple, DMMRBC=2, DMOST=0, DMCRS=0, RSCEM-

    0000:07:08.0 Ethernet controller: Intel Corp. 82541GI/PI Gigabit Ethernet Controller (rev 05)
    Subsystem: Dell: Unknown device 016d
    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 (63750ns min), Cache Line Size: 0x10 (64 bytes)
    Interrupt: pin A routed to IRQ 65
    Region 0: Memory at fe3e0000 (32-bit, non-prefetchable) [size=128K]
    Region 2: I/O ports at dcc0 [size=64]
    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=1 PME-
    Capabilities: [e4] PCI-X non-bridge device.
    Command: DPERE- ERO+ RBC=0 OST=0
    Status: Bus=0 Dev=0 Func=0 64bit- 133MHz- SCD- USC-, DC=simple, DMMRBC=2, DMOST=0, DMCRS=0, RSCEM-

    0000:09:0d.0 VGA compatible controller: ATI Technologies Inc Radeon RV100 QY [Radeon 7000/VE] (prog-if 00 [VGA])
    Subsystem: Dell: Unknown device 016c
    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 (2000ns min), Cache Line Size: 0x10 (64 bytes)
    Interrupt: pin A routed to IRQ 18
    Region 0: Memory at f0000000 (32-bit, prefetchable) [size=128M]
    Region 1: I/O ports at cc00 [size=256]
    Region 2: Memory at fe0f0000 (32-bit, non-prefetchable) [size=64K]
    Expansion ROM at <unassigned> [disabled] [size=128K]
    Capabilities: [50] 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-

    [7.6.] SCSI information (from /proc/scsi/scsi)

    Attached devices:
    Host: scsi0 Channel: 00 Id: 00 Lun: 00
    Vendor: MegaRAID Model: LD 0 RAID1 34G Rev: 521S
    Type: Direct-Access ANSI SCSI revision: 02
    Host: scsi0 Channel: 04 Id: 06 Lun: 00
    Vendor: PE/PV Model: 1x2 SCSI BP Rev: 1.0
    Type: Processor ANSI SCSI revision: 02
    Host: scsi1 Channel: 00 Id: 00 Lun: 00
    Vendor: MegaRAID Model: LD 0 RAID0 139G Rev: 351S
    Type: Direct-Access ANSI SCSI revision: 02
    Host: scsi1 Channel: 00 Id: 01 Lun: 00
    Vendor: MegaRAID Model: LD 1 RAID0 139G Rev: 351S
    Type: Direct-Access ANSI SCSI revision: 02
    Host: scsi1 Channel: 00 Id: 02 Lun: 00
    Vendor: MegaRAID Model: LD 2 RAID0 34G Rev: 351S
    Type: Direct-Access ANSI SCSI revision: 02
    Host: scsi1 Channel: 04 Id: 06 Lun: 00
    Vendor: DELL Model: PV22XS Rev: E.17
    Type: Processor ANSI SCSI revision: 03
    Host: scsi1 Channel: 05 Id: 00 Lun: 00
    Vendor: ADIC Model: FastStor 2 Rev: G12r
    Type: Medium Changer ANSI SCSI revision: 02
    Host: scsi1 Channel: 05 Id: 05 Lun: 00
    Vendor: HP Model: Ultrium 2-SCSI Rev: F53A
    Type: Sequential-Access ANSI SCSI revision: 03
    Host: scsi1 Channel: 05 Id: 05 Lun: 01
    Vendor: HP Model: Ultrium 2-SCSI Rev: F53A
    Type: Sequential-Access ANSI SCSI revision: 03
    Host: scsi1 Channel: 05 Id: 05 Lun: 02
    Vendor: HP Model: Ultrium 2-SCSI Rev: F53A
    Type: Sequential-Access ANSI SCSI revision: 03
    Host: scsi1 Channel: 05 Id: 05 Lun: 03
    Vendor: HP Model: Ultrium 2-SCSI Rev: F53A
    Type: Sequential-Access ANSI SCSI revision: 03
    Host: scsi1 Channel: 05 Id: 05 Lun: 04
    Vendor: HP Model: Ultrium 2-SCSI Rev: F53A
    Type: Sequential-Access ANSI SCSI revision: 03
    Host: scsi1 Channel: 05 Id: 05 Lun: 05
    Vendor: HP Model: Ultrium 2-SCSI Rev: F53A
    Type: Sequential-Access ANSI SCSI revision: 03
    Host: scsi1 Channel: 05 Id: 05 Lun: 06
    Vendor: HP Model: Ultrium 2-SCSI Rev: F53A
    Type: Sequential-Access ANSI SCSI revision: 03
    Host: scsi2 Channel: 00 Id: 00 Lun: 00
    Vendor: TEAC Model: DVD-ROM DV-28E-C Rev: D.4E
    Type: CD-ROM ANSI SCSI revision: 02

    [7.7.] Other information that might be relevant to the problem
    (please look in /proc and include all information that you
    think to be relevant):

    Nothing I can think of. If there is any relevant information needed,
    please ask. (nothing in the kernel logs during the poor performance)

    [X.] Other notes, patches, fixes, workarounds:

    We're staying with the 2.4.31 kernel for now.

    --
    -- arthur de jong - arthur@west.nl - west consulting b.v. --
    -
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