A unique CPU graph in performance monitor helps very little.
It will help less and less as time goes by and processors get more and more cores.
So please, add CPU usage per Core in Performance monitor, or even better per thread for hyperthreading processors.
Usage example. Should one multi timbral VSTi be loaded once, with n instruments, or should I create n instances of the VSTi, with one instrument per instance ? This is the type of compromise that is best analyzed with meters for each cores or for each thread.