System and method for managing power consumption in a computer system having a redundant power supply
When a power supply of a redundant power supply array fails or is removed from the computer system, the operating speed of the processor is modulated or throttled, thereby reducing the rate of power consumption by the processor. Each power supply in the array is rated to a power delivery capacity that is less than the maximum power draw of the computer system.
1. A method for managing power consumption in a computer system having a processor, comprising the steps of: providing an array of redundant power supplies, wherein each power supply in the array of redundant power supplies is rated to a power delivery capacity that is less than a maximum power draw of the computer system; identifying by an array controller a loss of operation of a power supply of the array of redundant power supplies, wherein a total rated capacity of functioning power supplies of the array of redundant power supplies is less than the maximum power draw of the computer system; and reducing an operating speed of the processor of the computer system.
2. The method for managing power consumption in a computer system of claim 1 , wherein the step of reducing the operating speed of the processor of the computer system comprises the step of asserting a signal to an input of the processor to cause the processor to enter a power management mode.
3. The method for managing power consumption in a computer system of claim 1 , wherein the step of identifying the loss of operation of the power supply of the array of redundant power supplies comprises the step of notifying a BIOS of the computer system of the loss of operation of the power supply of the array of redundant power supplies.
4. The method for managing power consumption in a computer system of claim 3 , wherein a signal at the processor is asserted by the BIOS of the computer system.
5. The method for managing power consumption in a computer system of claim 1 , further comprising the step of increasing the operating speed of the processor in conjunction with operation of all power supplies of the array of redundant power supplies.
6. A computer system, comprising: an array of redundant power supplies, wherein each power supply of the array is rated to a power delivery capacity that is less than a maximum power draw of the computer system; and a processor; wherein an operating speed of the processor is reduced upon a loss of a power supply of the array of redundant power supplies, wherein the loss is identified by an array controller, whereby a power draw of the computer system is reduced to a level below a total rated capacity of functioning power supplies of the array, and wherein the total rated capacity of the functioning power supplies of the array is less than the maximum power draw of the computer system.
7. The computer system of claim 6 , wherein the operating speed of the processor is reduced by an assertion of a signal at the processor to cause the processor to enter a system management mode.
8. The computer system of claim 6 , wherein the array of redundant power supplies includes the array controller for identifying a failure or a removal of the power supply of the array of redundant power supplies.
9. The computer system of claim 6 , further comprising a BIOS for receiving an indication of the loss of the power supply and for asserting a signal to cause the processor to reduce a clock speed of a clock in the processor.
10. The computer system of claim 6 , further comprising a BIOS for receiving an indication of the loss of the power supply and for asserting a signal to cause a lower voltage level to be applied to the processor.
11. The computer system of claim 6 , further comprising a BIOS for receiving an indication of the loss of the power supply and for asserting a signal to reduce a data rate of a front side bus of the processor.
12. A method for reducing a power draw of a computer system having an array of redundant power supplies, wherein each power supply is rated to a power delivery capacity that is less than a maximum power draw of the computer system, comprising the steps of: identifying by an array controller a loss of a power supply of the computer system, wherein a total rated capacity of functioning power supplies of the array is less than the maximum power draw of the computer system; determining whether the power draw of the computer system has reached or exceeded a predetermined threshold level; and causing a processor to enter a power conservation state when the power draw of the computer system reaches or exceeds the threshold level.
13. The method for reducing the power draw of a computer system of claim 12 , wherein the step of causing the processor to enter the power conservation state comprises the step of causing the processor to reduce an effective rate of at least one internal clock of the processor.
14. The method for reducing the power draw of a computer system of claim 12 , wherein the step of causing the processor to enter a power conservation state comprises the step of causing a lower voltage level to be applied to the processor.
15. The method for reducing the power draw of a computer system of claim 12 , wherein the step of causing the processor to enter the power conservation state comprises the step of lowering a data rate of a front side bus of the processor.