This is a kernel module that will test the speed of various
performance counter msrs.

It is based heavily on the perfctr-2.6 code by
Mikael Pettersson.

http://user.it.uu.se/~mikpe/linux/perfctr/

I mainly have this together to advance the cause
of a patch that uses rdpmc in the kernel.

Vince Weaver
vweaver1@eecs.utk.edu
13 March 2012