setiathome issues on 5.2.1 SMP

[Chris Stenton]

I have 2 xeon processors and thus when I start setiathome I get 4 copies
started.

When I do make -j8 buildworld I notice  a 20%  performance improvement when
I remove setiathome. I am sure when I tried this a couple of years ago on my
old P4 that the difference was not so marked on a single processor. Is Giant
very slow at removing processes that use idol time?

Chris