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    SubjectBUG REPORT: Massive performance drop in routing throughput with 2.4.21
    Hello all,

    there seems to be a real serious problem with 2.4.21, routing through two
    ethernet-devices. After 24 hours of a routing-only box the throughput from
    ethernet a to ethernet b decreased to something around 4-100 kByte/sec (100
    Mbit network 2 cards ns83820). I had to drop using 2.4.21 on this box because
    of this. 2.4.20 is flawless on the machine and ran for around 100 days before
    without any troubles. Going back to 2.4.20 cured it.

    The box itself:

    00:00.0 Host bridge: VIA Technologies, Inc. VT82C693A/694x [Apollo PRO133x]
    (rev c4)
    Subsystem: Asustek Computer, Inc.: Unknown device 8038
    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
    Region 0: Memory at fc000000 (32-bit, prefetchable) [size=32M]
    Capabilities: [a0] AGP version 2.0
    Status: RQ=31 SBA+ 64bit- FW- Rate=x1,x2,x4
    Command: RQ=0 SBA- AGP- 64bit- FW- Rate=<none>
    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-

    00:01.0 PCI bridge: VIA Technologies, Inc. VT82C598/694x [Apollo MVP3/Pro133x
    AGP] (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: 0
    Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
    I/O behind bridge: 0000d000-0000dfff
    Memory behind bridge: f9800000-fbdfffff
    Prefetchable memory behind bridge: fbf00000-fbffffff
    BridgeCtl: Parity- SERR- NoISA- VGA+ MAbort- >Reset- FastB2B-
    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-

    00:04.0 ISA bridge: VIA Technologies, Inc. VT82C686 [Apollo Super South] (rev
    40)
    Subsystem: Asustek Computer, Inc.: Unknown device 8038
    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
    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-

    00:04.1 IDE interface: VIA Technologies, Inc. VT82C586B PIPC Bus Master IDE
    (rev 06) (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-
    Region 4: I/O ports at b800 [disabled] [size=16]
    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-

    00:04.2 USB Controller: VIA Technologies, Inc. USB (rev 16) (prog-if 00 [UHCI])
    Subsystem: VIA Technologies, Inc. (Wrong ID) USB 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: 20, cache line size 08
    Interrupt: pin D routed to IRQ 15
    Region 4: I/O ports at b400 [size=32]
    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-

    00:04.3 USB Controller: VIA Technologies, Inc. USB (rev 16) (prog-if 00 [UHCI])
    Subsystem: VIA Technologies, Inc. (Wrong ID) USB 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: 20, cache line size 08
    Interrupt: pin D routed to IRQ 15
    Region 4: I/O ports at b000 [size=32]
    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-

    00:04.4 Host bridge: VIA Technologies, Inc. VT82C686 [Apollo Super ACPI] (rev
    40)
    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-
    Capabilities: [68] 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: National Semiconductor Corporation DP83820
    10/100/1000 Ethernet 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: 20 (2750ns min, 13000ns max), cache line size 08
    Interrupt: pin A routed to IRQ 15
    Region 0: I/O ports at a800 [size=256]
    Region 1: Memory at f9000000 (32-bit, non-prefetchable) [size=4K]
    Expansion ROM at <unassigned> [disabled] [size=64K]

    00:0b.0 Ethernet controller: National Semiconductor Corporation DP83820
    10/100/1000 Ethernet 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: 20 (2750ns min, 13000ns max), cache line size 08
    Interrupt: pin A routed to IRQ 10
    Region 0: I/O ports at a400 [size=256]
    Region 1: Memory at f8800000 (32-bit, non-prefetchable) [size=4K]
    Expansion ROM at <unassigned> [disabled] [size=64K]

    00:0c.0 Ethernet controller: Digital Equipment Corporation DECchip 21140
    [FasterNet] (rev 22)
    Subsystem: D-Link System Inc DFE-500TX Fast Ethernet
    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: 20 (5000ns min, 10000ns max), cache line size 08
    Interrupt: pin A routed to IRQ 11
    Region 0: I/O ports at a000 [size=128]
    Region 1: Memory at f8000000 (32-bit, non-prefetchable) [size=128]
    Expansion ROM at <unassigned> [disabled] [size=256K]

    00:0d.0 SCSI storage controller: LSI Logic / Symbios Logic 53c1010 Ultra3 SCSI
    Adapter (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: 72 (4250ns min, 4500ns max), cache line size 08
    Interrupt: pin A routed to IRQ 14
    Region 0: I/O ports at 9800 [size=256]
    Region 1: Memory at f7800000 (64-bit, non-prefetchable) [size=1K]
    Region 3: Memory at f7000000 (64-bit, non-prefetchable) [size=8K]
    Expansion ROM at <unassigned> [disabled] [size=64K]
    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-

    00:0d.1 SCSI storage controller: LSI Logic / Symbios Logic 53c1010 Ultra3 SCSI
    Adapter (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: 72 (4250ns min, 4500ns max), cache line size 08
    Interrupt: pin A routed to IRQ 14
    Region 0: I/O ports at 9400 [size=256]
    Region 1: Memory at f6800000 (64-bit, non-prefetchable) [size=1K]
    Region 3: Memory at f6000000 (64-bit, non-prefetchable) [size=8K]
    Expansion ROM at <unassigned> [disabled] [size=64K]
    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-

    01:00.0 VGA compatible controller: ATI Technologies Inc Rage XL AGP 2X (rev 27)
    (prog-if 00 [VGA])
    Subsystem: ATI Technologies Inc Xpert 98 RXL AGP 2X
    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 11
    Region 0: Memory at fa000000 (32-bit, non-prefetchable) [size=16M]
    Region 1: I/O ports at d800 [size=256]
    Region 2: Memory at f9800000 (32-bit, non-prefetchable) [size=4K]
    Expansion ROM at fbfe0000 [disabled] [size=128K]
    Capabilities: [50] AGP version 1.0
    Status: RQ=255 SBA+ 64bit- FW- Rate=x1,x2
    Command: RQ=0 SBA- AGP- 64bit- FW- Rate=<none>
    Capabilities: [5c] 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-


    meminfo during problem:


    total: used: free: shared: buffers: cached:
    Mem: 4075950080 1629593600 2446356480 0 103702528 1415892992
    Swap: 2147467264 0 2147467264
    MemTotal: 3980420 kB
    MemFree: 2389020 kB
    MemShared: 0 kB
    Buffers: 101272 kB
    Cached: 1382708 kB
    SwapCached: 0 kB
    Active: 1131004 kB
    Inactive: 359432 kB
    HighTotal: 3112944 kB
    HighFree: 1720812 kB
    LowTotal: 867476 kB
    LowFree: 668208 kB
    SwapTotal: 2097136 kB
    SwapFree: 2097136 kB

    cpuinfo:

    processor : 0
    vendor_id : GenuineIntel
    cpu family : 6
    model : 8
    model name : Pentium III (Coppermine)
    stepping : 10
    cpu MHz : 1004.528
    cache size : 256 KB
    fdiv_bug : no
    hlt_bug : no
    f00f_bug : no
    coma_bug : no
    fpu : yes
    fpu_exception : yes
    cpuid level : 2
    wp : yes
    flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat
    pse36 mmx fxsr sse
    bogomips : 2005.40

    processor : 1
    vendor_id : GenuineIntel
    cpu family : 6
    model : 8
    model name : Pentium III (Coppermine)
    stepping : 10
    cpu MHz : 1004.528
    cache size : 256 KB
    fdiv_bug : no
    hlt_bug : no
    f00f_bug : no
    coma_bug : no
    fpu : yes
    fpu_exception : yes
    cpuid level : 2
    wp : yes
    flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat
    pse36 mmx fxsr sse
    bogomips : 2005.40


    lsmod:

    Module Size Used by Not tainted
    nfs 75768 1 (autoclean)
    lockd 51440 1 (autoclean) [nfs]
    sunrpc 70044 1 (autoclean) [nfs lockd]
    ipt_LOG 3480 1 (autoclean)
    iptable_filter 1740 1 (autoclean)
    iptable_nat 17176 1 (autoclean)
    ip_conntrack 20992 1 (autoclean) [iptable_nat]
    ip_tables 12568 5 [ipt_LOG iptable_filter iptable_nat]
    cls_u32 5788 1
    sch_prio 3296 0 (unused)
    sch_sfq 3520 0 (unused)
    sch_tbf 2944 0 (unused)
    sch_cbq 13792 1
    tulip 42848 1
    ns83820 14288 2


    Regards,
    Stephan

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