To learn about SMP on Linux in general, I'd suggest an informative article here:

http://www.heise.de/ct/english/98/13/140/

I can't recall now, but I believe it does mention Perl somewhere in there.

Other than that, unfortunately, I'm not aware of Perl specific modules that would implement an SMP mechanism. You might look at pure C libraries (and probably even think of writing an interface module in perl?.. crazy, but ;)

"There is no system but GNU, and Linux is one of its kernels." -- Confession of Faith