Re: smp problem with 8 CPU's

I have a ProLiant DL740 (same architecture as 760) and 8-way SMP works
fine with BETA7 as long as Hyperthreading is disabled in the BIOS. 
Here's my dmesg (notice the "ACPI APIC Table" line.  That was missing
from your kernel's dmesg:

Copyright (c) 1992-2004 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 5.3-BETA7 #0: Sat Oct  2 21:01:00 UTC 2004
    root_at_wv1u.samsco.home:/usr/obj/usr/src/sys/GENERIC
ACPI APIC Table: <HP     P47     >
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Intel(R) XEON(TM) MP CPU 1.50GHz (1499.46-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0xf22  Stepping = 2
  Features=0x3febfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM>
real memory  = 2147418112 (2047 MB)
avail memory = 2095951872 (1998 MB)
FreeBSD/SMP: Multiprocessor System Detected: 8 CPUs
 cpu0 (BSP): APIC ID:  0
 cpu1 (AP): APIC ID:  2
 cpu2 (AP): APIC ID:  4
 cpu3 (AP): APIC ID:  6
 cpu4 (AP): APIC ID:  8
 cpu5 (AP): APIC ID: 10
 cpu6 (AP): APIC ID: 12
 cpu7 (AP): APIC ID: 14
MADT: Forcing active-low polarity and level trigger for SCI
ioapic0 <Version 1.1> irqs 0-15 on motherboard
ioapic1 <Version 1.1> irqs 16-31 on motherboard
ioapic2 <Version 1.1> irqs 32-47 on motherboard
npx0: [FAST]
npx0: <math processor> on motherboard
npx0: INT 16 interface
acpi0: <HP P47> on motherboard
acpi0: Power Button (fixed)
Timecounter "ACPI-safe" frequency 3579545 Hz quality 1000
acpi_timer0: <32-bit timer at 3.579545MHz> port 0x920-0x923 on acpi0
cpu0: <ACPI CPU> on acpi0
cpu1: <ACPI CPU> on acpi0
cpu2: <ACPI CPU> on acpi0
cpu3: <ACPI CPU> on acpi0
cpu4: <ACPI CPU> on acpi0
cpu5: <ACPI CPU> on acpi0
cpu6: <ACPI CPU> on acpi0
cpu7: <ACPI CPU> on acpi0
acpi_tz0: <Thermal Zone> on acpi0
pcib0: <ACPI Host-PCI bridge> on acpi0
pci0: <ACPI PCI bus> on pcib0
pci0: <display, VGA> at device 3.0 (no driver attached)
pci0: <base peripheral> at device 12.0 (no driver attached)
pci0: <base peripheral> at device 12.2 (no driver attached)
atapci0: <ServerWorks CSB5 UDMA100 controller> port
0x2820-0x282f,0x376,0x170-0x177,0x3f6,0x1f0-0x1f7 at device 15.1 on
pci0
ata0: channel #0 on atapci0
ata1: channel #1 on atapci0
ohci0: <OHCI (generic) USB controller> mem 0xf6ef0000-0xf6ef0fff irq
10 at device 15.2 on pci0
ohci0: [GIANT-LOCKED]
usb0: OHCI version 1.0, legacy support
usb0: SMM does not respond, resetting
usb0: <OHCI (generic) USB controller> on ohci0
usb0: USB revision 1.0
uhub0: (0x1166) OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 4 ports with 4 removable, self powered
isab0: <PCI-ISA bridge> at device 15.3 on pci0
isa0: <ISA bus> on isab0
pci0: <memory> at device 16.0 (no driver attached)
pci0: <memory> at device 16.1 (no driver attached)
pci0: <memory> at device 16.2 (no driver attached)
pcib1: <ACPI Host-PCI bridge> on acpi0
pci1: <ACPI PCI bus> on pcib1
bge0: <Broadcom BCM5703 Gigabit Ethernet, ASIC rev. 0x1002> mem
0xf6df0000-0xf6dfffff irq 44 at device 4.0 on pci1
miibus0: <MII bus> on bge0
brgphy0: <BCM5703 10/100/1000baseTX PHY> on miibus0
brgphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseTX,
1000baseTX-FDX, auto
bge0: Ethernet address: 00:08:02:e0:43:6e
bge1: <Broadcom BCM5703 Gigabit Ethernet, ASIC rev. 0x1002> mem
0xf6de0000-0xf6deffff irq 43 at device 5.0 on pci1
miibus1: <MII bus> on bge1
brgphy1: <BCM5703 10/100/1000baseTX PHY> on miibus1
brgphy1:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseTX,
1000baseTX-FDX, auto
bge1: Ethernet address: 00:08:02:e0:43:6f
pcib2: <ACPI Host-PCI bridge> on acpi0
pci2: <ACPI PCI bus> on pcib2
ciss0: <Compaq Smart Array 5i> port 0x3000-0x30ff mem
0xf6bf0000-0xf6bf3fff,0xf6cc0000-0xf6cfffff irq 19 at device 14.0 on
pci2
ciss0: [GIANT-LOCKED]
pcib3: <ACPI Host-PCI bridge> on acpi0
pci3: <ACPI PCI bus> on pcib3
pci3: <base peripheral> at device 30.0 (no driver attached)
pcib4: <ACPI Host-PCI bridge> on acpi0
pci7: <ACPI PCI bus> on pcib4
pci7: <base peripheral> at device 30.0 (no driver attached)
pcib5: <ACPI Host-PCI bridge> on acpi0
pci11: <ACPI PCI bus> on pcib5
pci11: <base peripheral> at device 30.0 (no driver attached)
atkbdc0: <Keyboard controller (i8042)> port 0x64,0x60 irq 1 on acpi0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
kbd0 at atkbd0
atkbd0: [GIANT-LOCKED]
sio0 port 0x3f8-0x3ff irq 4 on acpi0
sio0: type 16550A
fdc0: <floppy drive controller (FDE)> port 0x3f7,0x3f2-0x3f5 irq 6 drq
2 on acpi0
fdc0: [FAST]
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
orm0: <ISA Option ROMs> at iomem
0xee000-0xeffff,0xc8000-0xcbfff,0xc0000-0xc7fff on isa0
pmtimer0 on isa0
ppc0: parallel port not found.
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
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
Timecounters tick every 10.000 msec
acd0: DVDROM <Compaq DVD-ROM DV28EB 01/D.2F> at ata0-master PIO4
da0 at ciss0 bus 0 target 0 lun 0
da0: <COMPAQ RAID 0  VOLUME OK> Fixed Direct Access SCSI-0 device
da0: 135.168MB/s transfers
da0: 34727MB (71122560 512 byte sectors: 255H 32S/T 8716C)
SMP: AP CPU #1 Launched!
SMP: AP CPU #2 Launched!
SMP: AP CPU #3 Launched!
SMP: AP CPU #7 Launched!
SMP: AP CPU #4 Launched!
SMP: AP CPU #6 Launched!
SMP: AP CPU #5 Launched!
Mounting root from ufs:/dev/da0s1a
bge0: gigabit link up