SMP interrupt problem

Rob fbsdq at
Sat Feb 23 17:49:44 UTC 2008

Scott Bennett wrote:

>> Once it is running it seems to just be busy doing interrupts.
>> When "idle" top -C -S shows:
>> last pid:   811;  load averages:  1.00,  0.67,  0.31    up 0+00:04:24  07:32:53
>> 65 processes:  6 running, 43 sleeping, 16 waiting
>> CPU states:  0.0% user,  0.0% nice,  0.0% system, 43.6% interrupt, 56.4% idle
>> Mem: 7376K Active, 4768K Inact, 18M Wired, 8336K Buf, 963M Free
>> Swap: 1024M Total, 1024M Free
>>    13 root        1 171   52     0K     8K RUN    0   3:43 99.02% idle: cpu0
>>    23 root        1 -52 -171     0K     8K CPU2   2   2:51 85.11% irq9: acpi0
>      Have you looked to see which device(s) you have at IRQ 9?  Is there some
> problem with the device(s)?
>>    11 root        1 171   52     0K     8K RUN    2   0:55 12.89% idle: cpu2
>>    37 root        1 171   52     0K     8K pgzero 0   0:00  0.00% pagezero
>>    15 root        1 -32 -151     0K     8K WAIT   0   0:00  0.00% swi4: clock s
>>     0 root        1  96    0     0K     0K WAIT   1   0:00  0.00% swapper
>>     4 root        1  -8    0     0K     8K -      0   0:00  0.00% g_down
>>     3 root        1  -8    0     0K     8K -      0   0:00  0.00% g_up
>> If anyone has an idea what the problem is I would be grateful for any advice.
>      You deleted part of the startup messages, so we can't see what you have
> at IRQ 9.  Go back and look at either dmesg(1) output or /var/log/messages
> to find out what device(s) interrupt(s) at IRQ 9.  Then check for anything
> weird about the device activity.
Thanks for the reply, I didn't post the whole dmesg as I couldn't see an irq 9 in 
the listing - sorry, I should have mentioned that. I have pasted the whole dmesg 
output below again though in case there are any other clues in there:

Copyright (c) 1992-2008 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
         The Regents of the University of California. All rights reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 6.3-RELEASE #0: Wed Jan 16 04:45:45 UTC 2008
     root at
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Intel(R) Xeon(TM) CPU 2.80GHz (2799.21-MHz 686-class CPU)
   Origin = "GenuineIntel"  Id = 0xf29  Stepping = 9
   Logical CPUs per core: 2
real memory  = 1073676288 (1023 MB)
avail memory = 1037307904 (989 MB)
FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs
  cpu0 (BSP): APIC ID:  0
  cpu1 (AP): APIC ID:  1
  cpu2 (AP): APIC ID:  6
  cpu3 (AP): APIC ID:  7
MADT: Forcing active-low polarity and level trigger for SCI
ioapic0 <Version 2.0> irqs 0-23 on motherboard
ioapic1 <Version 2.0> irqs 24-47 on motherboard
ioapic2 <Version 2.0> irqs 48-71 on motherboard
kbd1 at kbdmux0
ath_hal: (AR5210, AR5211, AR5212, RF5111, RF5112, RF2413, RF5413)
hptrr: HPT RocketRAID controller driver v1.1 (Jan 16 2008 04:43:12)
acpi0: <A M I OEMRSDT> on motherboard
acpi0: Power Button (fixed)
Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x408-0x40b on acpi0
cpu0: <ACPI CPU> on acpi0
acpi_throttle0: <ACPI CPU Throttling> on cpu0
cpu1: <ACPI CPU> on acpi0
cpu2: <ACPI CPU> on acpi0
cpu3: <ACPI CPU> on acpi0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
pci0: <ACPI PCI bus> on pcib0
pcib1: <ACPI PCI-PCI bridge> at device 2.0 on pci0
pci2: <ACPI PCI bus> on pcib1
pcib2: <ACPI PCI-PCI bridge> at device 29.0 on pci2
pci4: <ACPI PCI bus> on pcib2
em0: <Intel(R) PRO/1000 Network Connection Version - 6.7.2> port 0xd800-0xd83f m
em 0xfe9e0000-0xfe9fffff irq 48 at device 1.0 on pci4
em0: Ethernet address: 00:e0:81:27:63:93
pcib3: <ACPI PCI-PCI bridge> at device 31.0 on pci2
pci3: <ACPI PCI bus> on pcib3
uhci0: <Intel 82801CA/CAM (ICH3) USB controller USB-A> port 0xe800-0xe81f irq 16
  at device 29.0 on pci0
usb0: <Intel 82801CA/CAM (ICH3) USB controller USB-A> on uhci0
usb0: USB revision 1.0
uhub0: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
pcib4: <ACPI PCI-PCI bridge> at device 30.0 on pci0
pci1: <ACPI PCI bus> on pcib4
fxp0: <Intel 82551 Pro/100 Ethernet> port 0xc400-0xc43f mem 0xfe7fe000-0xfe7feff
f,0xfe7a0000-0xfe7bffff irq 17 at device 1.0 on pci1
miibus0: <MII bus> on fxp0
inphy0: <i82555 10/100 media interface> on miibus0
inphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
fxp0: Ethernet address: 00:e0:81:27:63:92
pci1: <display, VGA> at device 2.0 (no driver attached)
isab0: <PCI-ISA bridge> at device 31.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel ICH3 UDMA100 controller> port 0x1f0-0x1f7,0x3f6,0x170-0x177,0x37
6,0xffa0-0xffaf at device 31.1 on pci0
ata0: <ATA channel 0> on atapci0
ata1: <ATA channel 1> on atapci0
pci0: <serial bus, SMBus> at device 31.3 (no driver attached)
acpi_button0: <Power Button> on acpi0
acpi_button1: <Sleep Button> on acpi0
sio0: configured irq 4 not in bitmap of probed irqs 0
sio0: port may not be enabled
sio0: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 flags 0x10 on acpi0
sio0: type 16550A
sio1: configured irq 3 not in bitmap of probed irqs 0
sio1: port may not be enabled
sio1: <16550A-compatible COM port> port 0x2f8-0x2ff irq 3 on acpi0
sio1: type 16550A
fdc0: <floppy drive controller (FDE)> port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on acpi
fdc0: [FAST]
ppc0: <Standard parallel printer port> port 0x378-0x37f irq 7 on acpi0
ppc0: Generic chipset (NIBBLE-only) in COMPATIBLE mode
ppbus0: <Parallel port bus> on ppc0
plip0: <PLIP network interface> on ppbus0
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
ppi0: <Parallel I/O> on ppbus0
pmtimer0 on isa0
orm0: <ISA Option ROMs> at iomem 0xc0000-0xc7fff,0xc8000-0xc97ff on isa0
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
kbd0 at atkbd0
atkbd0: [GIANT-LOCKED]
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
ukbd0: DELL DELL USB Keyboard, rev 1.10/1.00, addr 2, iclass 3/1
kbd2 at ukbd0
uhid0: DELL DELL USB Keyboard, rev 1.10/1.00, addr 2, iclass 3/1
Timecounters tick every 1.000 msec
hptrr: no controller detected.
ad0: 76319MB <WDC WD800JB-00FSA0 77.07W77> at ata0-master UDMA100
SMP: AP CPU #2 Launched!
SMP: AP CPU #1 Launched!
SMP: AP CPU #3 Launched!
Trying to mount root from ufs:/dev/ad0s1a

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