I posted this question some month ago, got no replies.  I recently
repeated the installation with FreeBSD 6.2 and got the same results.

-Robert Johnson, [EMAIL PROTECTED]



FreeBSD 6.1 runs very slowly out of the box on my MS-1029 AMD Turion
notebook computer.  The first line from the output of 'ps -aux' tells
that interrupt 19, in use by the ohci and cardbus systems, is consuming
80% of the CPU time:


root     21 79.1  0.0     0    16  ??  LL   11:52AM  25:48.51 [irq19:
cbb0 ohci



I attempted to disable the affected devices in the boot configuration
file "/boot/device.hints."  In all cases my 'hints' were ignored and
the device drivers were loaded as normal.  I also tried to do the
equivalent with sysctls, also to no avail (though I might be doing the
Wrong Thing):





Booting in safe mode and with ACPI disabled did not help.

I rebuilt the kernel with the cardbus driver disabled.  This caused the
cardbus to disappear from the problem interrupt but the ohci driver was
still using irq19 and was having an interrupt storm.  In the
compromised state of my computer it takes 48 hours to compile a kernel,
I don't have access to another computer and anyways I need USB support,
so I don't want to recompile again without USB support.

I installed FreeBSD 6.0 and the problem was the same.  I installed
FreeBSD 5.3 and there was no problem (except that I needed to disable
ACPI), nor was there a problem with NetBSD 3.0, nor Linux 2.4 or 2.6. 
OpenBSD 3.9 also appears to suffer from an interrupt problem.



   The computer is a Microstar MS-1029 with an AMD MT-37 Turion
processor running at 2.0ghz.

   The Motherboard uses an ATI Radeon Xpress 200P Chipset (North Bridge
RX480M, South Bridge SB400).

   The Graphics Card is an ATI Mobility Radeon X700 with 128 MB of
dedicated RAM.

   The system has 1024 MB of memory.  The BIOS is "A1029AMS v2.70"

I used the minimal installation from 6.1-RELEASE-amd64-disc1.iso

# uname -a

FreeBSD  6.1-RELEASE FreeBSD 6.1-RELEASE #0: Sun May  7 04:04:14 UTC
2006     [EMAIL PROTECTED]:/usr/obj/usr/src/sys/GENERIC  amd64

see below for dmesg output.

Windows XP reports the following information regarding IRQ 19:

IRQ 19  Standard OpenHCD USB Host Controller    OK

IRQ 19  Standard OpenHCD USB Host Controller    OK

IRQ 19  Standard Enhanced PCI to USB Host Controller    OK

IRQ 19  Ricoh R/RL/5C476(II) or Compatible CardBus Controller   OK

The results of running other operating systems on the computer:

FreeBSD 6.1 -!  ohci (USB) and cardbus interrupt storm on IRQ 19
FreeBSD 6.2 -! identical problem 

FreeBSD 6.0 -!  identical problem

FreeBSD 5.3 --  ACPI crashes on boot.  No interrupt storm when booted

                w/o ACPI, kernel ignores spurious interrupt on IRQ 7

NetBSD 3.0 --   no problem

OpenBSD 3.9 -!  Apparently the same problem as with the FreeBSD 6

                kernels... interrupts use 80+% of the cpu; the
                individual interrupts are not listed by ps... I don't
                know much about OpenBSD so I can't say more.

Slackware 9.1 with Linux 2.4 kernel -- no interrupt problem (but disk

                access is slow, probably an old ATA driver)

Slackware 11 with Linux 2.6 kernel -- no problem

WindowsXP Professional with SP2 -- occasional spurious 'data'

                returned by ACPI hardware, runs fine otherwise.

When I first installed FreeBSD 6.1, the install program ran fine, and
at the end of the install process I checked the state of the processes
using the holographic shell; there was no interrupt storm.

When I tried booting my system using the install disk as a rescue disk,
the system suffered from the same interrupt storm (perhaps there is a
significant difference between the "install configuration" and the
"rescue configuration")?

I noticed in the boot process that the computer appears to run fine
through the initial boot, but at around the point that it begins
processing the rc files it slows down.  The slowdown appears to begin
between "module_register_init: MOD_LOAD (amr_linux, 0xffffffff806205d0,
0) error 6" and "Entropy Harvesting:"; in particular, the slowdown
first appears noticeable when the ATA devices were probed (but this may
just be due to waiting for devices to respond).  Following up on this
observation, I disabled entropy harvesting of interrupts but this did
not help.  Windows reports this about the IDE/ATA system:

Name    Standard Dual Channel PCI IDE Controller

Manufacturer    (Standard IDE ATA/ATAPI controllers)

Status  OK

PNP Device ID   PCI\VEN_1002&DEV_4376&SUBSYS_02911462&REV_00\3&267A616A&0&A1

I/O Port        0x0000FF00-0x0000FF0F

Driver  c:\windows\system32\drivers\pciide.sys (5.1.2600.0
(XPClient.010817-1148), 3.25 KB (3,328 bytes), 8/3/2004 9:07 PM)

Windows also reports an occasional error from the ACPI hardware:

\Device\ACPIEC: The embedded controller (EC) hardware didn't respond
within the timeout period.  This may indicate an error in the EC
hardware or firmware, or possibly a poorly designed BIOS which accesses
the EC in an unsafe manner.  The EC driver will retry the failed
transaction if possible.

This is all the headway I've been able to make, sorry I wasn't able to
pinpoint the problem.

# dmesg -a
Copyright (c) 1992-2006 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 6.1-RELEASE #0: Sun May  7 04:04:14 UTC 2006
    [EMAIL PROTECTED]:/usr/obj/usr/src/sys/GENERIC
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: AMD Turion(tm) 64 Mobile Technology MT-37 (1989.82-MHz K8-class CPU)
  Origin = "AuthenticAMD"  Id = 0x20f42  Stepping = 2
  AMD Features=0xe2500800<SYSCALL,NX,MMX+,FFXSR,LM,3DNow+,3DNow>
  AMD Features2=0x1<LAHF>
real memory  = 536084480 (511 MB)
avail memory = 505630720 (482 MB)
ioapic0: Changing APIC ID to 1
ioapic0 <Version 2.1> irqs 0-23 on motherboard
kbd1 at kbdmux0
acpi0: <MSI 1029> on motherboard
acpi0: Overriding SCI Interrupt from IRQ 9 to IRQ 21
acpi0: Power Button (fixed)
acpi_ec0: <Embedded Controller: GPE 0x6> port 0x62,0x66 on acpi0
Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000
acpi_timer0: <32-bit timer at 3.579545MHz> port 0x4008-0x400b on acpi0
cpu0: <ACPI CPU> on acpi0
acpi_perf0: invalid _PSS package
acpi_throttle0: <ACPI CPU Throttling> on cpu0
acpi_throttle0: CLK_VAL field overlaps THT_EN bit
device_attach: acpi_throttle0 attach returned 6
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
pci1: <ACPI PCI bus> on pcib1
pci1: <display, VGA> at device 0.0 (no driver attached)
ohci0: <ATI SB400 USB Controller> mem 0xfbdfd000-0xfbdfdfff irq 19 at
device 19.0 on pci0
usb0: OHCI version 1.0, legacy support
usb0: <ATI SB400 USB Controller> on ohci0
usb0: USB revision 1.0
uhub0: ATI OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 4 ports with 4 removable, self powered
ohci1: <ATI SB400 USB Controller> mem 0xfbdfe000-0xfbdfefff irq 19 at
device 19.1 on pci0
usb1: OHCI version 1.0, legacy support
usb1: <ATI SB400 USB Controller> on ohci1
usb1: USB revision 1.0
uhub1: ATI OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub1: 4 ports with 4 removable, self powered
ehci0: <ATI SB400 USB 2.0 controller> mem 0xfbdff000-0xfbdfffff irq 19
at device 19.2 on pci0
usb2: EHCI version 1.0
usb2: companion controllers, 4 ports each: usb0 usb1
usb2: <ATI SB400 USB 2.0 controller> on ehci0
usb2: USB revision 2.0
uhub2: ATI EHCI root hub, class 9/0, rev 2.00/1.00, addr 1
uhub2: 8 ports with 8 removable, self powered
pci0: <serial bus, SMBus> at device 20.0 (no driver attached)
atapci0: <ATI IXP400 UDMA133 controller> port
0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0xff00-0xff0f at device 20.1 on pci0
ata0: <ATA channel 0> on atapci0
ata1: <ATA channel 1> on atapci0
isab0: <PCI-ISA bridge> at device 20.3 on pci0
isa0: <ISA bus> on isab0
pcib2: <ACPI PCI-PCI bridge> at device 20.4 on pci0
pci2: <ACPI PCI bus> on pcib2
rl0: <RealTek 8139 10/100BaseTX> port 0xe800-0xe8ff mem
0xfbfffc00-0xfbfffcff irq 18 at device 3.0 on pci2
miibus0: <MII bus> on rl0
rlphy0: <RealTek internal media interface> on miibus0
rlphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
rl0: Ethernet address: 00:13:d3:af:0a:b0
cbb0: <RF5C476 PCI-CardBus Bridge> irq 19 at device 4.0 on pci2
cardbus0: <CardBus bus> on cbb0
pccard0: <16-bit PCCard bus> on cbb0
cbb1: <RF5C476 PCI-CardBus Bridge> irq 20 at device 4.1 on pci2
cardbus1: <CardBus bus> on cbb1
pccard1: <16-bit PCCard bus> on cbb1
fwohci0: <Ricoh R5C552> mem 0xfbfff000-0xfbfff7ff irq 21 at device 4.2
on pci2
fwohci0: OHCI version 1.0 (ROM=1)
fwohci0: No. of Isochronous channels is 4.
fwohci0: EUI64 00:10:dc:00:00:d9:2b:8b
fwohci0: Phy 1394a available S400, 2 ports.
fwohci0: Link S400, max_rec 2048 bytes.
firewire0: <IEEE1394(FireWire) bus> on fwohci0
fwe0: <Ethernet over FireWire> on firewire0
if_fwe0: Fake Ethernet address: 02:10:dc:d9:2b:8b
fwe0: Ethernet address: 02:10:dc:d9:2b:8b
fwe0: if_start running deferred for Giant
sbp0: <SBP-2/SCSI over FireWire> on firewire0
fwohci0: Initiate bus reset
fwohci0: node_id=0xc800ffc0, gen=1, CYCLEMASTER mode
firewire0: 1 nodes, maxhop <= 0, cable IRM = 0 (me)
firewire0: bus manager 0 (me)
ral0: <Ralink Technology RT2500> mem 0xfbffc000-0xfbffdfff irq 16 at
device 9.0 on pci2
ral0: MAC/BBP RT2560 (rev 0x04), RF RT2525
ral0: Ethernet address: 00:11:09:2a:ae:b0
pci0: <multimedia, audio> at device 20.5 (no driver attached)
pci0: <simple comms, generic modem> at device 20.6 (no driver attached)
acpi_lid0: <Control Method Lid Switch> on acpi0
acpi_button0: <Sleep Button> on acpi0
acpi_button1: <Power Button> on acpi0
acpi_tz0: <Thermal Zone> on acpi0
atkbdc0: <Keyboard controller (i8042)> port 0x60,0x64 irq 1 on acpi0
atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
kbd0 at atkbd0
atkbd0: [GIANT-LOCKED]
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: model IntelliMouse, device ID 3
acpi_acad0: <AC Adapter> on acpi0
battery0: <ACPI Control Method Battery> on acpi0
orm0: <ISA Option ROM> at iomem 0xce800-0xcf7ff on isa0
ppc0: cannot reserve I/O port range
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
sio0: configured irq 4 not in bitmap of probed irqs 0
sio0: port may not be enabled
sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
sio0: type 8250 or not responding
sio1: configured irq 3 not in bitmap of probed irqs 0
sio1: port may not be enabled
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
Timecounter "TSC" frequency 1989818882 Hz quality 800
Timecounters tick every 1.000 msec
module_register_init: MOD_LOAD (amr_linux, 0xffffffff806205d0, 0) error 6
ad0: 95396MB <HTS541010G9AT00 MBZOA60A> at ata0-master UDMA100
acd0: DVDR <HL-DT-ST DVD-RW GWA-4082N/CB03> at ata1-master UDMA33
Trying to mount root from ufs:/dev/ad0s2a
Loading configuration files.
Entropy harvesting:
swapon: adding /dev/ad0s2b as swap device
Starting file system checks:
/dev/ad0s2a: clean, 2638932 free (9300 frags, 328704 blocks, 0.3%

Setting hostname: .
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
        inet6 ::1 prefixlen 128 
        inet6 fe80::1%lo0 prefixlen 64 scopeid 0x4 
        inet netmask 0xff000000 
Additional routing options:
Starting devd.

Mounting NFS file systems:
Creating and/or trimming log files:
Starting syslogd.
ELF ldconfig path: /lib /usr/lib /usr/lib/compat
32-bit compatibility ldconfig path: /usr/lib32
warning: /usr/lib32
No such file or directory
Initial amd64 initialization:
Additional ABI support:
Starting usbd.
Starting local daemons:
Updating motd
Configuring syscons:
Starting cron.
Local package initialization:
Additional TCP options:
Starting background file system checks in 60 seconds.

Wed Aug 16 12:24:38 UTC 2006
Aug 16 12:25:08  login: ROOT LOGIN (root) ON ttyv0

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