Question about monitoring cpu usage (OSX 10.7.3)

A friend of mine has a dual xeon mac, but it seems as if all the processor activity is shown within one single window.

I wonder, is it possible to get view the activity for every processor core individually?

I have no idea if the processors are hyperthreaded.

With AM open, go to Window > Floating CPU Window and choose a style. That will give you a floating window that displays processor usage on each individual core.