System, apparatus and method for providing hardware state feedback to an operating system in a heterogeneous processor

A processor comprising:

• a first core having a first size and to operate at a first power consumption level;
• at least one second core having a second size and to operate at a second power consumption level, the first size greater than the second size and the first power consumption level greater than the second power consumption level;
• and
• a power controller including a resource allocation circuit to:
• receive a power budget for the first core and the at least one second core and scale the power budget based at least in part on at least one energy performance preference value to determine a scaled power budget;
• determine a first maximum operating point for the first core and a second maximum operating point for the at least one second core based at least in part on the scaled power budget;
• determine a first efficiency value for the first core based at least in part on the first maximum operating point for the first core and a second efficiency value for the at least one second core based at least in part on the second maximum operating point for the at least one second core;
• and
• report a hardware state change to an operating system scheduler based on the first efficiency value and the second efficiency value.