Providing hardware feedback information in virtual environment

The invention relates to providing hardware feedback information in a virtual environment. In one embodiment, a method includes receiving, in a first circuit of a processor, an indication that the processor enters a first virtual machine, the processor executing in a virtual machine environment having a root partition and at least one virtual partition including the first virtual machine; assigning a first hardware feedback structure to the root partition and assigning a second hardware feedback structure to the at least one virtual partition; populating the first hardware feedback structure with first performance and efficiency information about a plurality of cores of the processor; populating a second hardware feedback structure with the first performance and efficiency information about the plurality of cores of the processor; and providing the first performance and efficiency information from the second hardware feedback structure to a virtual machine scheduler of the at least one virtual partition. Othe