As far as I can tell, the Set Affinity Checkbox only benefits PII based
XEONs with 1Mb or more L2 cache.  NEVER set it on HyperThreaded CPUs because
the two logical CPUs share the memory IO and this becomes a major
bottleneck.  In fact, there have been reports that the Set Affinity option
actually brings HT enabled processors to their electronic knees.

According to Team Lamb Chop testers, locking the WU affinity to a single CPU
did indeed boost throughput on multiprocessors PII Xeons.

Mike Ober.

"Hurrah" <hurrah@not.here> wrote in message
news:m2mVc.3558$nS6.43203604@news-text.cableinet.net...

"f/f george" <george@yourplace.com> wrote in message
news:matai0151mltraps50mkcili0oj37b3acd@4ax.com...

Okay I will try and help with the affinity box.....Mike Ober is the
person that knows EXACTLY which processor to use it on and which not
to but.....if you use it and the processing slows down ALOT then the
box should not be checked/ticked. Basically what happens is the
processor runs out of memory and your processing slows down. This
happens because you have selected the affinity box and that ties that
unit to that processor. I believe that AMD's should NOT have the box
checked/ticked and Intel's should, but Mike can answer definitively.

Hi,

I checked the SETI Driver website and there is nothing there to fully
explain this function. (http://www.wakeassoc.com/setidriver/)

Would be nice if "Mike" could do a list of which CPU's to use the "set
processor affinity" switch to "ON" (assuming it is important - else why
would there be a facility in the first place??).

H.