Intel VTune have similar profiling information which is helping to find places where not all available cores (HECs) are used.
The idea is to use tri-color/semaphore (red, yellow, green) to paint the activity diagram depending on HEC usage. For example, if activity is less than 50% it's red, less than 75% yellow and more - green. So programs are pushed toward more parallel computations.

Actual HEC activity could be painted, too.