Power system utilizing processor core performance state control

1. A power system, comprising

a powered system including a plurality of subsystems that are each configured to operate in a plurality of different frequencies that each provide a respective performance state;

a power system controller that is coupled to each of the plurality of subsystems in the powered system through a respective dedicated power connection, and that is configured to couple to a power supply, wherein the power controller is configured to:

control power provided from the power supply to the respective dedicated power connection for each of the plurality of subsystems in the powered system such that each of the plurality of subsystems operate at a frequency that provides a performance state that is below a highest performance state;

determine whether the power supplied from the power supply to the powered system during operation of the powered system is sufficient to operate each of the subsystems at the highest performance state and perform power excursions without exceeding a power supply output capability of the power supply; and

in response to the power supplied to the powered system being insufficient to operate each of the plurality of subsystems at the highest performance state and perform power excursions without exceeding the power supply output capability of the power supply, control power provided from the power supply to the respective dedicated power connection for each of the plurality of subsystems such that a subset of the plurality of subsystems operate at a highest frequency that provides the highest performance state and the remainder of the plurality of subsystems operate at least one frequency that provides a performance state that is lower than the highest performance state such that the power supply output capability of the power supply is not exceeded by the subset of the plurality of subsystems operating at the highest performance state and performing power excursions.

2. The power system of claim 1 , wherein the power system controller is further configured, in response to start-up of the powered system, to:

control power provided from the power supply to the respective dedicated power connection for each of the plurality of subsystems such that each of the plurality of subsystems operate at a lowest frequency that provides a lowest performance state.

3. The power system of claim 1 , wherein the power system controller is further configured to:

retrieve a powered system configuration;

determine a power supply power budget for the powered system using the powered system configuration, wherein the at least one frequency that provide the performance state that each of the plurality of subsystems operate at and that is below the highest performance state is selected using the power supply power budget such that the powered system does not demand power that exceeds the power supply power budget.

4. The power system of claim 1 , wherein the power system controller is further configured to:

monitor a dynamic power demand of the powered system; and

control power provided from the power supply to the respective dedicated power connection for each of the plurality of subsystems such that the plurality of subsystems included in the subset of the plurality of subsystems that operate at the highest frequency that provides the highest performance state changes.

5. The power system of claim 1 , wherein the power system controller is coupled to at least one database that includes operation data for the plurality of subsystems in the powered system.

6. The power system of claim 5 , wherein the power system controller is further configured to:

retrieve the operation data for the plurality of subsystems from the at least one database; and

use the operation data to control power provided from the power supply to the respective dedicated power connection for each of the plurality of subsystems such that the subset of the plurality of subsystems operate at the highest frequency that provides the highest performance state and the remainder of the plurality of subsystems operate at the at least one frequency that provide the performance state that is lower than the highest performance state.

7. The power system of claim 1 , wherein the controlling power provided from the power supply to the respective dedicated power connection for each of the plurality of subsystems such that the subset of the plurality of subsystems operate at the highest frequency that provides the highest performance state and the remainder of the plurality of subsystems operate at the at least one frequency that provides the performance state that is lower than the highest performance state ensures that only a predetermined number of the subsystems are capable of demanding a subsystem peak power amount.

8. An information handling system, comprising:

a power supply;

a processor coupled to the power supply and including a plurality of cores;

a memory coupled to the processor; and

a power system controller that is coupled to the power supply and to each of the plurality of cores in the processor through a respective voltage plane, wherein the power system controller is configured to:

control power provided from the power supply to the respective voltage plane for each of the plurality of cores in the processor such that each of the plurality of cores operate at a performance state that is below a highest performance state;

determine whether the power supplied from the power supply to the processor during operation of the processor is sufficient to operate each of the plurality of cores at the highest performance state and perform power excursions without exceeding a power supply output capability of the power supply; and

in response to the power supplied to the processor being insufficient to operate each of the plurality of cores at the highest performance state and perform power excursions without exceeding a power supply output capability of the power supply, control power provided from the power supply to the respective voltage plane for each of the plurality of cores such that a subset of the plurality of cores operate at the highest performance state and the remainder of the plurality of cores operate at a performance state that is lower than the highest performance state such that the power supply output capability is not exceeded by the subset of the plurality of cores operating at the highest performance state and performing power excursions.

9. The IHS of claim 8 , wherein the power system controller is further configured, in response to start-up of the IHS, to:

control power provided from the power supply to the respective voltage plane for each of the plurality of cores such that each of the plurality of cores operate at a lowest performance state.

10. The IHS of claim 8 , wherein the power system controller is further configured to:

retrieve an IHS configuration;

determine a power supply power budget for the processor using the IHS configuration, wherein the performance state that each of the plurality of cores operate at and that is below the highest performance state is selected using the power supply power budget such that the processor does not demand power that exceeds the power supply power budget.

11. The IHS of claim 8 , wherein the power system controller is further configured to:

monitor a dynamic power demand of the processor; and

control power provided from the power supply to the respective voltage plane for each of the plurality of cores such that the plurality of cores included in the subset of the plurality of cores that operate at the highest performance state changes.

12. The IHS of claim 8 , wherein the power system controller is coupled to at least one database that includes operation data for the plurality of cores in the processor.

13. The IHS of claim 8 , wherein the power system controller is further configured to:

retrieve the operation data for the plurality of cores from the at least one database; and

use the operation data to control power provided from the power supply to the respective voltage plane for each of the plurality of cores such that the subset of the plurality of cores operate at the highest performance state and the remainder of the plurality of cores operate at the performance state that is lower than the highest performance state.

14. The IHS of claim 8 , wherein the controlling power provided from the power supply to the respective voltage plane for each of the plurality of cores such that the subset of the plurality of cores operate at the highest performance state and the remainder of the plurality of cores operate at the performance state that is lower than the highest performance state ensures that only a predetermined number of the cores are capable of demanding a core peak power amount.

15. A method for power supply output capability processor control in an information handling system (IHS), comprising:

controlling power provided from a power supply to a respective voltage plane coupled to each of a plurality of cores in a processor such that each of the plurality of cores operate at to a performance state that is below a highest performance state;

determining whether the power supplied from the power supply to the processor during operation of the processor is sufficient to operate each of the plurality of cores at the highest performance state and perform power excursions without exceeding a power supply output capability of the power supply; and

in response to the power supplied to the processor being insufficient to operate each of the plurality of cores at the highest performance state and perform power excursions without exceeding a power supply output capability of the power supply, controlling power provided from the power supply to the respective voltage plane coupled to each of the plurality of cores such that a subset of the plurality of cores operate at the highest performance state and the remainder of the plurality of cores operate at a performance state that is lower than the highest performance state such that the power supply output capability of the power supply is not exceeded by the subset of the plurality of cores operating at the highest performance state performing power excursions.

16. The method of claim 15 , further comprising:

controlling power provided from the power supply to the respective voltage plane coupled to each of the plurality of cores such that each of the plurality of cores operate at a lowest performance state in response to start-up of the IHS.

17. The method of claim 15 , further comprising:

retrieving an IHS configuration;

determining a power supply power budget for the processor using the IHS configuration, wherein the performance state that each of the plurality of cores operate at and that is below the highest performance state is selected using the power supply power budget such that the processor does not demand power that exceeds the power supply power budget.

18. The method of claim 15 , further comprising:

monitoring a dynamic power demand of the processor; and

controlling power provided from the power supply to the respective voltage plane coupled to each of the plurality of cores such that the plurality of cores included in the subset of the plurality of cores that operate at the highest performance state changes.

19. The method of claim 15 , wherein the power system controller is coupled to at least one database that includes operation data for the plurality of cores in the processor, and wherein the method further comprises:

retrieving the operation data for the plurality of cores from the at least one database; and

using the operation data to control power provided from the power supply to the respective voltage plane coupled to each of the plurality of cores such that the subset of the plurality of cores operate at the highest performance state and the remainder of the plurality of cores operate at the performance state that is lower than the highest performance state.

20. The method of claim 15 , wherein the controlling power provided from the power supply to the respective voltage plane coupled to each of the plurality of cores such that the subset of the plurality of cores operate at the highest performance state and the remainder of the plurality of cores operate at the performance state that is lower than the highest performance state ensures that only a predetermined number of the cores are capable of demanding a cores peak power amount.