On Mon, 27 Nov 2000, Alfred Perlstein wrote:

> * Alfred Perlstein <[EMAIL PROTECTED]> [001127 21:56] wrote:
> > * The Hermit Hacker <[EMAIL PROTECTED]> [001127 18:12] wrote:
> > > 
> > > Morning all ...
> > > 
> > >   Every since the SMPng code went into -current way back when, I've
> > > been experiencing hangs ... and am not quite sure how to debug this.  I'm
> > > in X all the time, so breaking to the debugger to see where its hanging
> > > isn't possible ...
> > > 
> > >   Some kernels its relatively easy to trigger, some kernels are
> > > harder to trigger, but they all do at some point in time ...
> > >   
> > >   Can someone suggestion a method of being able to debug this?
> > 
> > Serial console, add BREAK_TO_DEBUGGER (sp?) to your kernel config and
> > hook your laptop up to it.
> Marc, I noticed you tried the BREAK_TO_DEBUGGER and whatnot already,
> perhaps letting us know what hardware you have in your smp box
> might help some, I'm running SMP and doing buildworlds and kernel
> compiles without a problem.  I'm not however, running X nor
> doing any desktop work on it.
> I think I also figured out what makes the box so damn sluggish
> when doing lots of IO *bops dillon* :)

well, here's a current dmesg .. any more detail then that needed?

Copyright (c) 1992-2000 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 5.0-CURRENT #0: Sun Nov 26 18:22:52 AST 2000
    [EMAIL PROTECTED]:/usr/local/mp3/obj/usr/local/base/src/sys/kernel
Timecounter "i8254"  frequency 1193182 Hz
CPU: Pentium II/Pentium II Xeon/Celeron (467.73-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0x665  Stepping = 5
real memory  = 268435456 (262144K bytes)
avail memory = 258248704 (252196K bytes)
Programming 24 pins in IOAPIC #0
IOAPIC #0 intpin 2 -> irq 0
FreeBSD/SMP: Multiprocessor motherboard
 cpu0 (BSP): apic id:  0, version: 0x00040011, at 0xfee00000
 cpu1 (AP):  apic id:  1, version: 0x00040011, at 0xfee00000
 io0 (APIC): apic id:  2, version: 0x00170011, at 0xfec00000
Preloaded elf kernel "kernel" at 0xc0309000.
Preloaded elf module "random.ko" at 0xc030909c.
Pentium Pro MTRR support enabled
Using $PIR table, 8 entries at 0xc00fdef0
npx0: <math processor> on motherboard
npx0: INT 16 interface
pcib0: <Intel 82443BX (440 BX) host to PCI bridge> at pcibus 0 on motherboard
pci0: <PCI bus> on pcib0
pcib1: <Intel 82443BX (440 BX) PCI-PCI (AGP) bridge> at device 1.0 on pci0
pci1: <PCI bus> on pcib1
pci1: <NVidia GeForce 256 graphics accelerator> at 0.0 irq 16
isab0: <Intel 82371AB PCI to ISA bridge> at device 7.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel PIIX4 ATA33 controller> port 0xf000-0xf00f at device 7.1 on pci0
ata0: at 0x1f0 irq 14 on atapci0
pci0: <Intel 82371AB/EB (PIIX4) USB controller> at 7.2 irq 11
Timecounter "PIIX"  frequency 3579545 Hz
pci0: <Intel 82371AB Power management controller> at 7.3
ahc0: <Adaptec 2910/15/20/30C SCSI adapter> port 0xc400-0xc4ff mem 
0xef000000-0xef000fff irq 19 at device 9.0 on pci0
aic7850: Single Channel A, SCSI Id=7, 3/255 SCBs
vx0: <3COM 3C590 Etherlink III PCI> port 0xc800-0xc81f irq 18 at device 11.0 on pci0
utp[*utp*]: disable 'auto select' with DOS util! address 00:20:af:f7:8f:d2
Warning! Defective early revision adapter!
ahc1: <Adaptec 2940 Ultra SCSI adapter> port 0xcc00-0xccff mem 0xef001000-0xef001fff 
irq 17 at device 13.0 on pci0
aic7880: Wide Channel A, SCSI Id=7, 16/255 SCBs
pci0: <unknown card> (vendor=0x1274, dev=0x5000) at 17.0 irq 19
atapci1: <HighPoint HPT366 ATA66 controller> port 
0xdc00-0xdcff,0xd800-0xd803,0xd400-0xd407 irq 18 at device 19.0 on pci0
ata2: at 0xd400 on atapci1
atapci2: <HighPoint HPT366 ATA66 controller> port 
0xe800-0xe8ff,0xe400-0xe403,0xe000-0xe007 irq 18 at device 19.1 on pci0
ata3: at 0xe000 on atapci2
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
kbd0 at atkbd0
ppc0: <Parallel port> at port 0x378-0x37f irq 7 on isa0
ppc0: Generic chipset (NIBBLE-only) in COMPATIBLE mode
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
ppi0: <Parallel I/O> on ppbus0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
sio0: type 16550A
sio1 at port 0x2f8-0x2ff irq 3 on isa0
sio1: type 16550A
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
unknown: <PNP0303> can't assign resources
unknown: <PNP0501> can't assign resources
unknown: <PNP0400> can't assign resources
unknown: <PNP0501> can't assign resources
APIC_IO: Testing 8254 interrupt delivery
APIC_IO: routing 8254 via IOAPIC #0 intpin 2
acd0: CDROM <CD-ROM 32X/AKU> at ata0-master using PIO4
Waiting 15 seconds for SCSI devices to settle
sa0 at ahc0 bus 0 target 4 lun 0
sa0: <DEC DLT2700 851A> Removable Sequential Access SCSI-2 device 
sa0: 5.000MB/s transfers (5.000MHz, offset 15)
da0 at ahc1 bus 0 target 0 lun 0
da0: <SEAGATE ST36530N 1281> Fixed Direct Access SCSI-2 device 
da0: 20.000MB/s transfers (20.000MHz, offset 15), Tagged Queueing Enabled
da0: 6208MB (12715920 512 byte sectors: 255H 63S/T 791C)
ch0 at ahc0 bus 0 target 4 lun 1
ch0: <DEC TZ Media Changer 851A> Removable Changer SCSI-2 device 
ch0: 5.000MB/s transfers (5.000MHz, offset 15)
ch0: 7 slots, 1 drive, 1 picker, 0 portals
Mounting root from ufs:/dev/da0s2a
da1 at ahc1 bus 0 target 1 lun 0
da1: <WDIGTL WD91 ULTRA2 1.00> Fixed Direct Access SCSI-2 device 
da1: 20.000MB/s transfers (20.000MHz, offset 15), Tagged Queueing Enabled
da1: 8727MB (17873040 512 byte sectors: 255H 63S/T 1112C)
SMP: AP CPU #1 Launched!
vx0: promiscuous mode enabled

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