Dynamic power budget allocation

1. A dynamic power budget allocation system, comprising:

a plurality of powered subsystems;

a power table database storing a peak power requirement for each of a plurality of operating modes available to each of the plurality of powered subsystems; and

a power system controller coupled to the plurality of powered subsystems, wherein the power system controller is configured, for each of a plurality of time intervals, to:

retrieve current power usage data from each of the plurality of powered subsystems during a current time interval while each of the plurality of powered subsystems operate in a respective current operating mode of the plurality of operating modes available to that powered subsystem;

determine a respective subsequent operating mode of the plurality of operating modes that is available to each of the plurality of powered subsystems in a subsequent time interval via immediate transition from the respective current operating mode at which that powered subsystem is operating, wherein the subsequent operating mode for each powered subsystem is a worst case scenario that is reachable within the subsequent time interval for each powered subsystem, and wherein at least one of the respective subsequent operating modes for a respective powered subsystem is less than a maximum operating mode that causes that powered subsystem to operate with a maximum peak power requirement;

retrieve, from the power table database, the peak power requirement for each respective subsequent operating mode that is available to each of the plurality of powered subsystems in the subsequent time interval via immediate transition from the respective current operating mode at which that powered subsystem is operating;

project subsequent power requirements for each of the plurality of powered subsystems for the subsequent time interval by using the current power usage data and the peak power requirement for the respective subsequent operating modes that are available to each of the plurality of powered subsystem in the subsequent time interval via immediate transition from the respective current operating mode at which that powered subsystem is operating to determine an upper bound on a subsequent power demand of each powered subsystem in the subsequent time interval;

determine at least one power setting for at least one of the plurality of powered subsystems using the subsequent power requirements; and

program the at least one of the plurality of powered subsystems with the at least one power setting.

2. The dynamic power budget allocation system of claim 1 , wherein each of the powered subsystems includes at least one powered subsystem component coupled to a powered subsystem voltage regulator, and wherein the subsystem voltage regulator is configured to provide the power system controller with the current power usage data and to be programmed with the at least one power setting.

3. The dynamic power budget allocation system of claim 1 , wherein the power system controller includes a database that stores a power history including prior power usage data from a plurality of prior time intervals, and wherein the power system controller also uses the power history to determine the at least one power setting for the at least one of the plurality of powered subsystems.

4. The dynamic power budget allocation system of claim 1 , wherein the subsequent power requirements include dynamic power requirements that include a plurality of different durations and duty cycles.

5. The dynamic power budget allocation system of claim 1 , wherein the using the current power usage data and the peak power requirement for the subsequent operating mode that is reachable by each of the plurality of powered subsystems to determine the upper bound on the subsequent power demand of each powered subsystem in the subsequent time interval includes using a current operating mode that is included in the current power usage data to determine a time needed for each powered subsystem to transition to the subsequent operating mode that consumes more power to determine the upper bound on the subsequent power demand of each powered subsystem in the subsequent time interval.

6. The dynamic power budget allocation system of claim 1 , wherein power system controller is further configured to:

program at least one of the plurality of powered subsystems with a threshold.

7. The dynamic power budget allocation system of claim 1 , wherein the current power usage data retrieved from each of the plurality of powered subsystems during the current time interval includes average power usage, peak power usage, dynamic power usage over one or more time intervals, and programmed threshold status.

8. An information handling system (IHS), comprising:

a chassis;

a processor system located in the chassis;

a memory system located in the chassis and coupled to the processor system;

a power table database storing peak power requirements for each of a plurality of operating modes available to each of the processor system and the memory system; and

a power system controller coupled to the processor system and the memory system, wherein the power system controller is configured, for each of a plurality of time intervals, to:

retrieve current power usage data from the processor system and the memory system during a current time interval while the processor system and memory system operate in a respective current operating mode of the plurality of operating modes available to the processor system and the memory system;

determine a respective subsequent operating mode of the plurality of operating modes that is available to each of the processor system and the memory system in a subsequent time interval via immediate transition from the respective current operating mode at which the processor system or memory system is operating, wherein the subsequent operating mode for each of the processor system and the memory system is a worst case scenario that is reachable within the subsequent time interval for each powered subsystem, and wherein at least one of the respective subsequent operating modes for the processor system and the memory system is less than a maximum operating mode that causes the processor system and the memory system to operate with a maximum peak power requirement;

retrieve, from the power table database, peak power requirements for each respective subsequent operating mode that is available to each of the processor system and the memory system in the subsequent time interval via immediate transition from the respective current operating mode at which the processor system and the memory system is operating;

project subsequent power requirements for the processor system and the memory system for the subsequent time interval by using the current power usage data and the peak power requirement for the respective subsequent operating modes that are available to each of the processor system and the memory system in the subsequent time interval via immediate transition from the respective current operating mode at which each of the processor system and the memory system is operating to determine an upper bound on a subsequent power demand of each of the processor system and the memory system in the subsequent time interval;

determine at least one power setting for at least one of the processor system and the memory system using the subsequent power requirements; and

program the at least one of the processor system and the memory system with the at least one power setting.

9. The IHS of claim 8 , wherein the processor system includes at least one processor coupled to a processor voltage regulator that is configured to provide the power system controller with current processor power usage data and to be programmed with the at least one processor power setting, and wherein the memory system includes at least one memory device coupled to a memory voltage regulator that is operable to provide the power system controller with current memory power usage data and to be programmed with the at least one memory power setting.

10. The IHS of claim 8 , wherein the power system controller includes a database that stores a power history including prior power usage data from a plurality of prior time intervals, and wherein the power system controller also uses the power history to determine the at least one power setting for the at least one of the processor system and the memory system.

11. The IHS of claim 8 , wherein the subsequent power requirements include dynamic power requirements that include a plurality of different durations and duty cycles.

12. The IHS of claim 8 , wherein the using the current power usage data and the peak power requirement for the subsequent operating mode that is reachable by each of the processor system and the memory system to determine the upper bound on the subsequent power demand of each of the processor system and the memory system in the subsequent time interval includes using a current operating mode that is included in the current power usage data to determine a time needed for each of the processor system and the memory system to transition to the subsequent operating mode that consumes more power to determine the upper bound on the subsequent power demand of each powered subsystem in the subsequent time interval.

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

program at least one of the processor system and the memory system with a threshold.

14. The IHS of claim 8 , wherein the current power usage data retrieved from each of the processor system and the memory system during the current time interval includes average power usage, peak power usage, dynamic power usage over one or more time windows, and programmed threshold status.

15. A method for dynamic power budget allocation in an information handling system (IHS), comprising:

retrieving current power usage data from each of a plurality of IHS subsystems during a current time interval while each of the plurality of IHS subsystems operate in a respective current operating mode of the plurality of operating modes available to that IHS subsystem;

determining a respective subsequent operating mode of the plurality of operating modes that is available to each of the plurality of IHS subsystems in a subsequent time interval via immediate transition from the respective current operating mode at which that IHS subsystem is operating, wherein the subsequent operating mode for each IHS subsystem is a worst case scenario that is reachable within the subsequent time interval for each IHS subsystem, and wherein at least one of the respective subsequent operating modes for a respective IHS subsystem is less than a maximum operating mode that causes that IHS subsystem to operate with a maximum peak power requirement;

retrieving a peak power requirement for each respective subsequent operating mode that is available to each of the plurality of IHS subsystems in the subsequent time interval via immediate transition from the respective current operating mode at which that IHS subsystem is operating;

projecting subsequent power requirements for each of the plurality of IHS subsystems for the subsequent time interval by using the current power usage data and the peak power requirement for the respective subsequent operating modes that are available to each of the plurality of IHS subsystem in the subsequent time interval via immediate transition from the respective current operating mode at which that IHS subsystem is operating to determine an upper bound on a subsequent power demand of each IHS subsystem in the subsequent time interval;

determining at least one power setting for at least one of the plurality of IHS subsystems using the subsequent power requirements; and

programming the at least one of the plurality of IHS subsystems with the at least one power setting.

16. The method of claim 15 , wherein each of the plurality of IHS subsystems includes at least one IHS subsystem component coupled to an IHS subsystem voltage regulator, and wherein the IHS subsystem voltage regulator provides the power system controller with the current power usage data and to be programmed with the at least one power setting.

17. The method of claim 15 , wherein the power system controller includes a database that stores a power history including prior power usage data from a plurality of prior time intervals, and wherein the power system controller also uses the power history to determine the at least one power setting for the at least one of the plurality of IHS subsystems.

18. The method of claim 15 , wherein the subsequent power requirements include dynamic power requirements that include a plurality of different durations and duty cycles and peak power requirements.

19. The method of claim 15 , further comprising:

programming at least one of the plurality of IHS subsystems with a threshold.

20. The method of claim 15 , wherein the current power usage data retrieved from each of the plurality of IHS subsystems during the current time interval includes average power usage, peak power usage, dynamic power usage over one or more time windows, and programmed threshold status.