Understanding Advanced Hotspots CPI

Hi,

I'm starting to learn how to analyze OMP projects, and I've found that AH in Vtune gives me CPI, and I'm trying to better understand what is displayed.

For arguments sake, if I've set # threads to 4 on a 4 core machine and the CPI displayed is 1, is this 1 for each core or for the entire machine? As in if the machine advanced X cycles, then has each core done X instructions or X/4?

Thanks,

Arik