Apple Inc. (Cupertino, CA)

A device includes the processing circuit, an energy processing module and an energy management circuit. The power management circuit could be used to determine the power consumption of the circuit’s processor over time as well as to determine the energy consumption at a variety of sampling frequencies. Each of the sampling frequencies are used to produce a distinct set of power values. The power management circuit is designed to monitor a specific property for each power value, and then provide each power value set the specific power value which corresponds to the specific characteristic of the power processing module. Based on at the very least one of the specific power values, the power processing module is configured to adjust an operating parameter of the processing circuit.

Technical Field

These examples are within the field of integrated circuits, and more specifically, power management for integrated circuits.

Description of the Related Art

Computer systems, like systems-on-a-chip (SoCs), may comprise one or more processor cores as well as multiple other circuits such as co-processors, audio and video circuits as well as networking and communication interfaces, and so on. These processor cores and circuits generate heat and power when they are active. Higher power consumption can lead to shorter battery life when using applications with a limited power supply for example, mobile computing devices that are powered by batteries (e.g. laptops tablets computers, smart phones, and wearable devices). It is possible that heat could cause problems for computer systems as well as mobile devices, even when the power source is sufficient for the system. A computer system that is heated could cause inconsistent or faulty performance or failure of certain circuits. components and devices may exceed reliable operating limits and, thus, may not function according to the specifications.

The broadest definition of a system, an apparatus, and an approach are considered where the apparatus comprises an operating circuit and an energy processing module and a power management circuit. The power management circuit can be set up to estimate, over time, energy consumption of the processor and then to measure the estimated energy consumption by using a plurality of different sampling frequency. Each sampling frequency can be used to generate a set of powervalues. The power management circuit may be further configured to track a particular characteristic for each set of power values, and then to provide, for each set of power values, a particular power value that corresponds to the particularcharacteristic to the power processing module. The power processing module may be configured to change an operating parameter according to at the very least one power level.

A good example is that the particular power measurement being carried out by the power management circuit may be in line with the highest power value for a particular set power values. Another instance is that the power management circuit might utilize separate estimates for dynamic currents or leakage currents to estimate the power consumption of the circuit. A processor interrupt signal could be issued by the power management circuit in the event that the power output for a particular set is found to exceed the threshold.

In a different scenario power management circuits may be further set up to increase a count value upon a determination that a generated power value from the specific range of power values meets an acceptable threshold. Software may permit you to choose an additional threshold value for an embossment. The power management circuit could change the threshold value to the latest value when the next sample of estimated energy consumption.

In another example, to adjust the operating parameters of the circuit that is processing it, the power processing module could be further configured to determine the average power consumption for the first time frame with the specific power value that is corresponding to the set of power values created by using the lowest sampling frequency and then to calculate a dynamic power consumption over a second time period that is shorter than the initial time frame, using the power value that corresponds to the set of power values that were generated using a highest sampling frequency. The power processing module could be further configured to, based on the power consumption average and the power consumption that is dynamic to determine the operating parameter of theprocessing circuit to be adjusted.

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