On Wed, Sep 18, 2002 at 02:10:17AM +0200, Kevin D. Kissell wrote:

Are you able to test this stuff on a proper SMP
system, by the way?  The efficiency of the code 
that manipulates interprocessor control variables 
can reasonably be expected to drop off a bit
in a system with MP cache invalidations blasting
left and right. 

Yes.  I understand this effect.  Solution 1), 2) 
and 3) don't really suffer from this problem because
variables tested & manipulated are local - unless the 
process migrates which is a different problem.

Jun