Activity colouring depending on HEC usage

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.

Start by locating the activity diagram rendering and the profiling data path that exposes HEC usage. Check how activity percentages are currently calculated, then define the red, yellow, and green thresholds described in the issue and determine whether actual HEC activity is available. Done means the diagram reflects those thresholds and any available HEC activity consistently.

Written by the indexing model from the issue text.