US 2013/0097443 A1 · DYNAMIC VOLTAGE AND CLOCK SCALING CONTROL BASED ON RUNNING AVERAGE, VARIANT AND TREND

Abstract

The aspects enable a computing device or microprocessor to scale the frequency and/or voltage of a processor to an optimal value balancing performance and power savings in view of a current processor workload. Busy and/or idle duration statistics are calculated from the processor during execution. The statistics may include a running average busy and/or idle duration or idle/busy ratio, a variance of the running average and a trend of the running average. Current busy or idle durations or an idle-to-busy ratio may be computed based on collected statistics. The current idle-to-busy ratio may be compared to a target idle-to-busy ratio and the frequency/voltage of the processor may be adjusted based on the results of the comparison to drive the current running average toward the target value. The target value of idle-to-busy ratio may be adjusted based on the calculated variance and/or trend values.

Claims24

Dependent claims

A method for conserving power in a computing device having a processor, comprising:

measuring busy or idle durations of the processor over a predetermined time span;
calculating statistic values based on the measured durations;
and
adjusting an operating frequency of the processor based upon the calculated statistics values.

1 more element

A computing device, comprising:

a memory;
and
a processor coupled to the memory, wherein the processor is configured with processor-executable instructions to perform operations comprising:
measuring busy or idle durations of the processor over a predetermined time span;
calculating statistic values based on the measured durations;
and
adjusting an operating frequency of the processor based upon the calculated statistics values.

4 more elements

A non-transitory computer readable storage medium having stored thereon processor-executable software instructions configured to cause a processor to perform operations for conserving power in a computing device, comprising:

measuring busy or idle durations of a device processor over a predetermined time span;
calculating statistic values based on the measured durations;
and
adjusting an operating frequency of the device processor based upon the calculated statistics values.

1 more element

Dependencies are inferred from the claim text.

Dynamic voltage and clock scaling control based on running average, variant and trend

Life of this patent

Dynamic voltage and clock scaling control based on running average, variant and trend

Life of this patent

Abstract

Claims24