X86 vs PowerPC watchdog

X86:
bash-3.2# ps -ef |grep watchdog
root         5     2  0 18:12 ?        00:00:00 [watchdog/0]
root         8     2  0 18:12 ?        00:00:00 [watchdog/1]
root        11     2  0 18:12 ?        00:00:00 [watchdog/2]
root        14     2  0 18:12 ?        00:00:00 [watchdog/3]
root      1644  1629  0 18:27 ttyS0    00:00:00 grep watchdog


See link:
http://damntechnology.blogspot.com/2010/04/linux-crash-debug-tips-i-have-soft.html
http://seriousbirder.com/blogs/linux-kernel-bug-soft-lockup-cpu1-stuck/
http://lwn.net/Articles/287024/

For TCO Watchdog:
http://www.mjmwired.net/kernel/Documentation/nmi_watchdog.txt

bash-3.2# cat /proc/interrupts
           CPU0       CPU1       CPU2       CPU3       curr    max  limit        hit
  0:         47          0          0          0          0    220      0          0  IO-APIC-edge      timer
  4:        703          0          0          0          0     70      0          0  IO-APIC-edge      serial
  8:          1          0          0          0          0     10      0          0  IO-APIC-edge      rtc
  9:          0          0          0          0          0      0      0          0  IO-APIC-fasteoi   acpi
 23:         28          0          0          0          0    140      0          0  IO-APIC-fasteoi   ehci_hcd:usb1
223:      21750          0          0      20994          0   3790      0          0  PCI-MSI-edge      ahci
NMI:          0          0          0          0   Non-maskable interrupts
LOC:     207839     207904     207885     207860   Local timer interrupts
CNT:          0          0          0          0   Performance counter interrupts
PND:          0          0          0          0   Performance pending work
RES:         15         15          7          5   Rescheduling interrupts
CAL:        339        346        345         71   function call interrupts
TLB:        477        484        488        468   TLB shootdowns
TRM:          0          0          0          0   Thermal event interrupts
SPU:          0          0          0          0   Spurious interrupts
ERR:          0
MIS:          0

bash-3.2# cat /proc/sys/kernel/nmi_watchdog
0


PPC:

#ls /dev/watchdog
/dev/watchdog
# echo "V" > /dev/watchdog // Disable watchdog
# echo "1" > /dev/watchdog // Punch it