MP watchdog (or: I have a dual-xeon with processors to burn)

Brad Knowles brad at
Sun Aug 15 14:11:41 PDT 2004

At 3:46 PM -0400 2004-08-15, Robert Watson wrote:

>  You can add MP_WATCHDOG to your i386 conf file, select SCHED_4BSD as the
>  scheduler, and use the debug.watchdog sysctl to set a debugging CPU (I'll
>  usually set it to 3 on my box).

	This is way, way cool!

	Thanks for your hard work, and continued hard work on tracking 
down the SMP hangs!

Brad Knowles, <brad at>

"Those who would give up essential Liberty, to purchase a little
temporary Safety, deserve neither Liberty nor Safety."

     -- Benjamin Franklin (1706-1790), reply of the Pennsylvania
     Assembly to the Governor, November 11, 1755

   SAGE member since 1995.  See <> for more info.

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