Power management with dynamic frequency adjustments
First Claim
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1. A system comprising:
- a device operable for executing a task; and
a processor coupled to said device, wherein said processor specifies a value for a frequency for a clock signal used by said device and thereafter said processor is placed in a reduced power mode;
wherein said device is operable to perform said task after said processor is placed in said reduced power mode until a triggering event causes said device to send an interrupt to said processor;
wherein in response to said interrupt said processor awakens to dynamically adjust said frequency of said clock signal so that a metric satisfies a first condition.
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Abstract
A central processing unit (CPU) can specify an initial (e.g., baseline) frequency for a clock signal used by a device to perform a task. The CPU is then placed in a reduced power mode. The device performs the task after the CPU is placed in the reduced power mode until a triggering event causes the device to send an interrupt to the CPU. In response to the interrupt, the CPU awakens to dynamically adjust the clock frequency. If the clock frequency is reset to the baseline value, then the CPU is again placed in the reduced power mode.
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Citations
20 Claims
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1. A system comprising:
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a device operable for executing a task; and a processor coupled to said device, wherein said processor specifies a value for a frequency for a clock signal used by said device and thereafter said processor is placed in a reduced power mode;
wherein said device is operable to perform said task after said processor is placed in said reduced power mode until a triggering event causes said device to send an interrupt to said processor;
wherein in response to said interrupt said processor awakens to dynamically adjust said frequency of said clock signal so that a metric satisfies a first condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
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operating a processor in a first power mode; in response to a selection of a device to perform a task and a selection of a value for a frequency for a clock used by said device, entering a reduced power mode at said processor, wherein said frequency of said clock remains set to said value until a triggering event occurs; awakening said processor in response to an interrupt generated by said device so that said processor can dynamically adjust said value for said frequency of said clock. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A system comprising:
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a processor; and a device coupled to said processor, wherein said processor specifies a value for a baseline clock frequency for said device and then enters a reduced power mode, wherein said device executes tasks using said value for said baseline clock frequency and awakens said processor from said reduced power mode if said value for said baseline clock frequency is to be changed. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification