1. A method for measuring use of a plurality of physical processors in a multithreaded system, comprising: measuring a logical usage percentage of each of a plurality of threads available in a computer system comprising a plurality of physical processors running said plurality of threads; measuring a physical usage percentage of said plurality of physical processors by each of said plurality of threads; and calculating a percentage usage of a total capacity of said plurality of physical processors from said logical usage percentages and said physical usage percentages, such that said percentage usage reflects an actual use of said plurality of physical processors independent of which of said plurality of threads is utilized.