Hi all
  I'm having a problem on a new dedicated box (so I'm not sure what the
exact motherboard brand is)
It's an Athlon-64, with 1gb of ram, on what looks like an ATI-based
motherboard.

It has extremely high number of interrupt requests though; running
sysstat vm 1 shows that it has around 64,000 interrupts/second, and
spends more than 80% of it's CPU handling interrupt requests.

Any input would be great!
Thanks!
Jonathan

Here's my dmesg:

Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
    2006, 2007
    The NetBSD Foundation, Inc.  All rights reserved.
Copyright (c) 1982, 1986, 1989, 1991, 1993
    The Regents of the University of California.  All rights reserved.

NetBSD 4.99.28 (GENERIC) #0: Sat Aug 18 09:47:06 PDT 2007
        jpk@taliesin.my.domain:/usr/obj/current_15Aug07/src/sys/arch/amd64/compile/GENERIC
total memory = 958 MB
avail memory = 911 MB
timecounter: Timecounters tick every 10.000 msec
timecounter: Timecounter "i8254" frequency 1193182 Hz quality 100
mainbus0 (root)
cpu0 at mainbus0: (uniprocessor)
cpu0: AMD Athlon(tm) 64 Processor 3200+, 1989.92 MHz
cpu0: features: e7dbfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR>
cpu0: features: e7dbfbff<PGE,MCA,CMOV,PAT,PSE36,MPC,NOX,MMXX,MMX>
cpu0: features: e7dbfbff<FXSR,SSE,SSE2,LONG,3DNOW2,3DNOW>
cpu0: features2: 1<SSE3>
cpu0: I-cache 64 KB 64B/line 2-way, D-cache 64 KB 64B/line 2-way
cpu0: L2 cache 512 KB 64B/line 16-way
cpu0: ITLB 32 4 KB entries fully associative, 8 4 MB entries fully associative
cpu0: DTLB 32 4 KB entries fully associative, 8 4 MB entries fully associative
cpu0: AMD Power Management features: 3f<STC,TM,TTP,VID,FID,TS>
cpu0: AMD Cool`n'Quiet Technology 2000 MHz
cpu0: available frequencies (Mhz): 1000 1800 2000
cpu0: WARNING: AMD errata present, BIOS upgrade may be
cpu0: WARNING: necessary to ensure reliable operation
cpu0: 8 page colors
acpi0 at mainbus0: Advanced Configuration and Power Interface
acpi0: using Intel ACPI CA subsystem version 20060217
acpi0: X/RSDT: OemId <HP    ,AWRDACPI,42302e31>, AslId <AWRD,00000000>
acpi0: SCI interrupting at int 9
acpi0: fixed-feature power button present
timecounter: Timecounter "ACPI-Safe" frequency 3579545 Hz quality 900
ACPI-Safe 32-bit timer
mpacpi: could not get bus number, assuming bus 0
LNKA: ACPI: Found matching pin for 0.20.INTA at func 1: 255
LNKB: ACPI: Found matching pin for 0.20.INTB at func 5: 11
LNKD: ACPI: Found matching pin for 0.19.INTA at func 0: 10
LNK1: ACPI: Found matching pin for 0.18.INTA at func 0: 5
LNKB: ACPI: Found matching pin for 1.5.INTA at func 0: 11
CPU0 (ACPI Object Type 'Processor' [0x0c]) at acpi0 not configured
CPU1 (ACPI Object Type 'Processor' [0x0c]) at acpi0 not configured
PWRB (PNP0C0C) [ACPI power button device] at acpi0 not configured
PCI0 (PNP0A03) [PCI/PCI-X Host Bridge] at acpi0 not configured
PMIO (PNP0C02) [Plug and Play motherboard register resources] at acpi0 not configured
LNKB (PNP0C0F) [PCI interrupt link device] at acpi0 not configured
LNKD (PNP0C0F) [PCI interrupt link device] at acpi0 not configured
LNK1 (PNP0C0F) [PCI interrupt link device] at acpi0 not configured
PIC (PNP0000) [AT Interrupt Controller] at acpi0 not configured
DMA1 (PNP0200) [AT DMA Controller] at acpi0 not configured
TMR (PNP0100) [AT Timer] at acpi0 not configured
RTC (PNP0B00) [AT Real-Time Clock] at acpi0 not configured
SPKR (PNP0800) [AT-style speaker sound] at acpi0 not configured
COPR (PNP0C04) [Math Coprocessor] at acpi0 not configured
SYSR (PNP0C02) [Plug and Play motherboard register resources] at acpi0 not configured
FDC0 (PNP0700) [PC standard floppy disk controller] at acpi0 not configured
UAR1 (PNP0501) [16550A-compatible COM port] at acpi0 not configured
ECP1 (PNP0401) [ECP printer port] at acpi0 not configured
PS2M (PNP0F13) [PS/2 Port for PS/2-style Mice] at acpi0 not configured
PS2K (PNP0303) [IBM Enhanced (101/102-key, PS/2 mouse support)] at acpi0 not configured
EXPL (PNP0C02) [Plug and Play motherboard register resources] at acpi0 not configured
MEM (PNP0C01) [System Board] at acpi0 not configured
THRM (ACPI Object Type 'Thermal' [0x0d]) at acpi0 not configured
pci0 at mainbus0 bus 0: configuration mode 1
pci0: i/o space, memory space enabled, rd/line, rd/mult, wr/inv ok
pchb0 at pci0 dev 0 function 0
pchb0: ATI Technologies RS480 Host Bridge (rev. 0x01)
ppb0 at pci0 dev 1 function 0: ATI Technologies RS480 PCI Express Bridge (rev. 0x00)
pci1 at ppb0 bus 1
pci1: i/o space, memory space enabled
vga0 at pci1 dev 5 function 0: ATI Technologies Radeon Xpress 200G Series (rev. 0x00)
wsdisplay0 at vga0 kbdmux 1: console (80x25, vt100 emulation)
wsmux1: connecting to wsdisplay0
direct rendering for vga0 unsupported
ATI Technologies product 0x5854 (miscellaneous display) at pci1 dev 5 function 1 not configured
ppb1 at pci0 dev 5 function 0: ATI Technologies RS480 PCI Express Bridge (rev. 0x00)
pci2 at ppb1 bus 2
pci2: i/o space, memory space enabled, rd/line, wr/inv ok
bge0 at pci2 dev 0 function 0: Broadcom BCM5751 Gigabit Ethernet
bge0: interrupting at irq 11
bge0: ASIC unknown BCM575x family (0x4200), Ethernet address 00:13:d3:b0:c6:5c
bge0: setting short Tx thresholds
brgphy0 at bge0 phy 1: BCM5750 1000BASE-T media interface, rev. 0
brgphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 1000baseT-FDX, auto
ixpide0 at pci0 dev 18 function 0
ixpide0: ATI Technologies IXP IDE Controller (rev. 0x00)
ixpide0: bus-master DMA support present
ixpide0: primary channel configured to native-PCI mode
ixpide0: using irq 5 for native-PCI interrupt
atabus0 at ixpide0 channel 0
ixpide0: secondary channel configured to native-PCI mode
atabus1 at ixpide0 channel 1
ohci0 at pci0 dev 19 function 0: ATI Technologies SB400 USB Host Controller (rev. 0x00)
ohci0: interrupting at irq 10
ohci0: OHCI version 1.0, legacy support
usb0 at ohci0: USB revision 1.0
uhub0 at usb0
uhub0: ATI Technologie OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 4 ports with 4 removable, self powered
ohci1 at pci0 dev 19 function 1: ATI Technologies SB400 USB Host Controller (rev. 0x00)
ohci1: interrupting at irq 10
ohci1: OHCI version 1.0, legacy support
usb1 at ohci1: USB revision 1.0
uhub1 at usb1
uhub1: ATI Technologie OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub1: 4 ports with 4 removable, self powered
ehci0 at pci0 dev 19 function 2: ATI Technologies SB400 USB2 Host Controller (rev. 0x00)
ehci0: interrupting at irq 10
ehci0: dropped intr workaround enabled
ehci0: BIOS has given up ownership
ehci0: EHCI version 1.0
ehci0: companion controllers, 4 ports each: ohci0 ohci1
usb2 at ehci0: USB revision 2.0
uhub2 at usb2
uhub2: ATI Technologies EHCI root hub, class 9/0, rev 2.00/1.00, addr 1
uhub2: 8 ports with 8 removable, self powered
ATI Technologies SB400 SMBus Controller (SMBus serial bus, revision 0x10) at pci0 dev 20 function 0 not configured
ixpide1 at pci0 dev 20 function 1
ixpide1: ATI Technologies IXP IDE Controller (rev. 0x00)
ixpide1: bus-master DMA support present
ixpide1: primary channel configured to compatibility mode
ixpide1: primary channel interrupting at irq 14
atabus2 at ixpide1 channel 0
ixpide1: secondary channel wired to compatibility mode
ixpide1: secondary channel interrupting at irq 15
atabus3 at ixpide1 channel 1
pcib0 at pci0 dev 20 function 3
pcib0: ATI Technologies SB400 PCI-ISA Bridge (rev. 0x00)
ppb2 at pci0 dev 20 function 4: ATI Technologies SB400 PCI-PCI Bridge (rev. 0x00)
pci3 at ppb2 bus 3
pci3: i/o space, memory space enabled
auixp0 at pci0 dev 20 function 5: ATI Technologies IXP AC'97 Audio Controller (rev. 0x01)
auixp0: interrupting at irq 11
auixp0: soft resetting aclink
pchb1 at pci0 dev 24 function 0
pchb1: Advanced Micro Devices AMD64 HyperTransport configuration (rev. 0x00)
pchb2 at pci0 dev 24 function 1
pchb2: Advanced Micro Devices AMD64 Address Map configuration (rev. 0x00)
pchb3 at pci0 dev 24 function 2
pchb3: Advanced Micro Devices AMD64 DRAM configuration (rev. 0x00)
pchb4 at pci0 dev 24 function 3
pchb4: Advanced Micro Devices AMD64 Miscellaneous configuration (rev. 0x00)
isa0 at pcib0
lpt0 at isa0 port 0x378-0x37b irq 7
com0 at isa0 port 0x3f8-0x3ff irq 4: ns16550a, working fifo
pckbc0 at isa0 port 0x60-0x64
pckbc: cmd word write error
attimer0 at isa0 port 0x40-0x43: AT Timer
pcppi0 at isa0 port 0x61
midi0 at pcppi0: PC speaker (CPU-intensive output)
sysbeep0 at pcppi0
fdc0 at isa0 port 0x3f0-0x3f7 irq 6 drq 2
pcppi0: attached to attimer0
timecounter: Timecounter "clockinterrupt" frequency 100 Hz quality 0
auixp0: ac97: Avance Logic ALC655 codec; no 3D stereo
auixp0: ac97: ext id 9c4<AC97_23,LDAC,SDAC,CDAC,SPDIF>
audio0 at auixp0: full duplex, mmap, independent
auixp0: codec spdif support detected but disabled for now
wd0 at atabus0 drive 0: <WDC WD2000JS-00MHB0>
wd0: drive supports 16-sector PIO transfers, LBA48 addressing
wd0: 186 GB, 387621 cyl, 16 head, 63 sec, 512 bytes/sect x 390721968 sectors
wd0: 32-bit data port
wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 6 (Ultra/133)
wd0(ixpide0:0:0): using PIO mode 4, Ultra-DMA mode 6 (Ultra/133) (using DMA)
wd1 at atabus1 drive 0: <ST3250620NS>
wd1: quirks 2<FORCE_LBA48>
wd1: drive supports 16-sector PIO transfers, LBA48 addressing
wd1: 232 GB, 484521 cyl, 16 head, 63 sec, 512 bytes/sect x 488397168 sectors
wd1: 32-bit data port
wd1: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 6 (Ultra/133)
wd1(ixpide0:1:0): using PIO mode 4, Ultra-DMA mode 6 (Ultra/133) (using DMA)
Kernelized RAIDframe activated
boot device: wd0
root on wd0a dumps on wd0b
root file system type: ffs