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CpuStatsCollector.CpuStats

public static class CpuStatsCollector.CpuStats
extends Object

java.lang.Object
   ↳ com.android.tradefed.device.CpuStatsCollector.CpuStats

Class for holding parsed output data for a single cpustats output.

This class holds parsed output, and also performs simple calculations on that data. The methods which perform these calucations should only be called after the object has been populated.

Summary

Fields

public Map<Integer, Integer> mFreqStats

public Map<CpuStatsCollector.TimeCategory, Integer> mTimeStats

Public constructors

CpuStatsCollector.CpuStats()

Public methods

Double getEstimatedMhz()

Estimate the MHz used by the cpu during the duration.

Double getPercentage(CpuStatsCollector.TimeCategory category)

Get the percentage of cycles used on a given category.

Double getUsedMhzPercentage()

Get the amount of MHz as a percentage of available MHz used by the cpu during the duration.

Fields

mFreqStats

public Map<Integer, Integer> mFreqStats

mTimeStats

public Map<CpuStatsCollector.TimeCategory, Integer> mTimeStats

Public constructors

CpuStatsCollector.CpuStats

public CpuStatsCollector.CpuStats ()

Public methods

getEstimatedMhz

public Double getEstimatedMhz ()

Estimate the MHz used by the cpu during the duration.

This is calculated by:

((sum(c_time) - idle) / sum(c_time)) * (sum(freq * f_time) / sum(f_time))

where c_time is the time for a given category, idle is the time in the idle state, freq is a frequency and f_time is the time spent in that frequency.

Returns
Double

getPercentage

public Double getPercentage (CpuStatsCollector.TimeCategory category)

Get the percentage of cycles used on a given category.

Parameters
category CpuStatsCollector.TimeCategory

Returns
Double

getUsedMhzPercentage

public Double getUsedMhzPercentage ()

Get the amount of MHz as a percentage of available MHz used by the cpu during the duration.

This is calculated by:

100 * sum(freq * f_time) / (max_freq * sum(f_time))

where freq is a frequency, f_time is the time spent in that frequency, and max_freq is the maximum frequency the cpu is capable of.

Returns
Double