dumpsys power 字段含义介绍

在分析app在测量功耗和亮灭屏的过程中，经常执行dumpsys power来获取PowerManagerService状态。以下是关于dumpsys power请在评论区指出打印部分字段的含义。

POWER MANAGER (dumpsys power)

Power Manager State:
Settings power_manager_constants:
no_cached_wake_locks=true
mDirty=0x0 （mDirty PMS核心参数用于表示当前事件类型的变化)
mWakefulness=Awake 当前预期的屏幕状态，Awake 表示唤醒状态
mWakefulnessChanging=falsemWakefulnessChanging 表示上一个参数mWakefulness如果这个参数发生变化，是否会改变true，然后会调用DIsplayManager切换屏幕状态
mIsPowered=true 是否充电，true在充电中表示
mPlugType=2 充电类型
mBatteryLevel=82 当前电量
mBatteryLevelWhenDreamStarted=0
mDockState=0
mStayOn=false 屏幕是否需要长亮
mProximityPositive=false 通话时距离感应传感器(打电话时，手机贴在脸上就会熄屏)
mBootCompleted=true 是否开始
mSystemReady=true 系统准备好了吗？
mHalAutoSuspendModeEnabled=false HAL层是否自己进入Suspend模式
mHalInteractiveModeEnabled=true 向HAL当前用户活动状态的层设置，true表示屏幕打开，用户在使用，false表示用户没有使用
mWakeLockSummary=0x25 记录所有锁的类型
mNotifyLongScheduled= 27s645ms
mNotifyLongDispatched=-51s118ms
mNotifyLongNextCheck=(none)
mUserActivitySummary=0x1 用户活动事件标志
mRequestWaitForNegativeProximity=false
mSandmanScheduled=false
mSandmanSummoned=false
mBatteryLevelLow=false 电池是否低电
mLightDeviceIdleMode=false
mDeviceIdleMode=false
mDeviceIdleWhitelist=[1000, 2000, 10014] 设备在IDLE状态下的app白名单
mDeviceIdleTempWhitelist=[1000]
mLastWakeTime=577519 (32358 ms ago) 重要的是，这意味着上次屏幕点亮的事件32358 ms ago 表示距离当前时间，屏幕在32秒前点亮
mLastSleepTime=498525 (111352 ms ago) 11352上次屏幕灭屏时间 ms ago 111秒前的息屏表示
mLastUserActivityTime=577519 (32358 ms ago) 最后一次活动时间，点击、充电等
mLastUserActivityTimeNoChangeLights=64807 (545070 ms ago) 用户最后一次不影响屏幕亮度的事件
mLastInteractivePowerHintTime=577519 (32358 ms ago)
mLastScreenBrightnessBoostTime=0 (609877 ms ago) 最后一次自动调整屏幕亮度的时间(即手机从黑暗的地方进入明亮的地方，手机屏幕会自动调整到最大亮度)
mScreenBrightnessBoostInProgress=false 是否正在调整屏幕亮度
mDisplayReady=true 显示器准备好了吗？OK
mHoldingWakeLockSuspendBlocker=true 是否持有阻止CPU休眠的锁
mHoldingDisplaySuspendBlocker=true 是否显示屏息屏的锁是否持有？

Settings and Configuration: 以下部分是系统的原始配置参数
mDecoupleHalAutoSuspendModeFromDisplayConfig=false
mDecoupleHalInteractiveModeFromDisplayConfig=false
mWakeUpWhenPluggedOrUnpluggedConfig=true
mWakeUpWhenPluggedOrUnpluggedInTheaterModeConfig=false
mTheaterModeEnabled=false
mSuspendWhenScreenOffDueToProximityConfig=true
mDreamsSupportedConfig=true
mDreamsEnabledByDefaultConfig=true
mDreamsActivatedOnSleepByDefaultConfig=false
mDreamsActivatedOnDockByDefaultConfig=true
mDreamsEnabledOnBatteryConfig=false
mDreamsBatteryLevelMinimumWhenPoweredConfig=-1
mDreamsBatteryLevelMinimumWhenNotPoweredConfig=15
mDreamsBatteryLevelDrainCutoffConfig=5
mDreamsEnabledSetting=true
mDreamsActivateOnSleepSetting=false
mDreamsActivateOnDockSetting=true
mDozeAfterScreenOff=false
mMinimumScreenOffTimeoutConfig=10000
mMaximumScreenDimDurationConfig=7000
mMaximumScreenDimRatioConfig=0.20000005
mScreenOffTimeoutSetting=60000
mSleepTimeoutSetting=-1
mMaximumScreenOffTimeoutFromDeviceAdmin=9223372036854775807 (enforced=false)
mStayOnWhilePluggedInSetting=0
mScreenBrightnessSetting=0
mScreenBrightnessModeSetting=0
mScreenBrightnessOverrideFromWindowManager=-1
mUserActivityTimeoutOverrideFromWindowManager=-1
mUserInactiveOverrideFromWindowManager=false
mDozeScreenStateOverrideFromDreamManager=0
mDrawWakeLockOverrideFromSidekick=false
mDozeScreenBrightnessOverrideFromDreamManager=-1
mScreenBrightnessSettingMinimum=10
mScreenBrightnessSettingMaximum=255
mScreenBrightnessSettingDefault=102
mDoubleTapWakeEnabled=false
mIsVrModeEnabled=false
mForegroundProfile=0

Sleep timeout: -1 ms
Screen off timeout: 60000 ms 实现用户设置的手机灭屏(从最后一个用户事件到屏幕完全熄灭，这是60秒)
Screen dim duration: 7000 ms 屏幕熄灭前变暗所持续的事件

应用状态信息

UID states (changing=false changed=false):

1000 表示应用的UDI，ACTIVE 表示应用是否处于活动状态，count该应用程序申请的锁的数量state 表示应用程序的运行等级

应用的运行等级可以百度搜索PROCESS_STATE_NONEXISTENT 让我们种状态下的具体运行状态。
UID 1000: ACTIVE count=0 state=0
UID 1001: ACTIVE count=0 state=0
  UID 1027:   ACTIVE  count=0 state=0
  UID 1068:   ACTIVE  count=0 state=0
  UID u0a8: INACTIVE  count=0 state=18
  UID u0a13: INACTIVE  count=0 state=18
  UID u0a14: INACTIVE  count=0 state=9
  UID u0a19: INACTIVE  count=0 state=18
  UID u0a21:   ACTIVE  count=0 state=18
  UID u0a24:   ACTIVE  count=0 state=0
  UID u0a25:   ACTIVE  count=0 state=4
  UID u0a34: INACTIVE  count=0 state=18
  UID u0a38: INACTIVE  count=0 state=18
  UID u0a40: INACTIVE  count=0 state=18
  UID u0a43: INACTIVE  count=0 state=18
  UID u0a44:   ACTIVE  count=0 state=5
  UID u0a53:   ACTIVE  count=0 state=13
  UID u0a54:   ACTIVE  count=2 state=2

Looper state:

 待处理的handl消息
  Looper (PowerManagerService, tid 34) {6ca4820}
    Message 0: { when=+20s642ms what=1 target=com.android.server.power.PowerManagerService$PowerManagerHandler }
    Message 1: { when=+27s645ms what=4 target=com.android.server.power.PowerManagerService$PowerManagerHandler }
    (Total messages: 2, polling=true, quitting=false)

Wake Locks: size=2 应用申请的锁的数量

锁的类型                                        锁的tag                                            当前锁所持有的时间 申请锁的app的UID以及PID
  PARTIAL_WAKE_LOCK              'My_Tag_PARTIAL_WAKE_LOCK' ACQ=-24s518ms (uid=10054 pid=15301)
  SCREEN_DIM_WAKE_LOCK           'My_Tag_SCREEN_DIM_WAKE_LOCK' ACQ=-24s512ms (uid=10054 pid=15301)

Suspend Blockers: size=4
  PowerManagerService.WakeLocks: ref count=1
  PowerManagerService.Display: ref count=1
  PowerManagerService.Broadcasts: ref count=0
  PowerManagerService.WirelessChargerDetector: ref count=0

Display Power: state=ON

Battery saving stats:
  Battery Saver is currently: OFF
    Last OFF time: 2020-10-30 09:36:09.545 -6h5m54s767ms 距离上次充满电的时间
    Times enabled: 0

  Drain stats:
                     Battery saver OFF                          ON
  NonDoze NonIntr:    358m     29mAh(  1%)      4.9mAh/h          0m      0mAh(  0%)      0.0mAh/h
             Intr:      1m      0mAh(  0%)      0.0mAh/h          0m      0mAh(  0%)      0.0mAh/h
  Deep    NonIntr:      0m      0mAh(  0%)      0.0mAh/h          0m      0mAh(  0%)      0.0mAh/h
             Intr:      0m      0mAh(  0%)      0.0mAh/h          0m      0mAh(  0%)      0.0mAh/h
  Light   NonIntr:      0m      0mAh(  0%)      0.0mAh/h          0m      0mAh(  0%)      0.0mAh/h
             Intr:      0m      0mAh(  0%)      0.0mAh/h          0m      0mAh(  0%)      0.0mAh/h

Battery saver policy (*NOTE* they only apply when battery saver is ON):
  Settings: battery_saver_constants
    value: null
  Settings: (overlay)
    value: 

  mAccessibilityEnabled=false
  vibration_disabled:config=true
  vibration_disabled:effective=true
  animation_disabled=false
  fullbackup_deferred=true
  keyvaluebackup_deferred=true
  firewall_disabled=false
  datasaver_disabled=true
  launch_boost_disabled=true
  adjust_brightness_disabled=true
  adjust_brightness_factor=0.5
  gps_mode=2
  force_all_apps_standby=true
  force_background_check=true
  optional_sensors_disabled=true
  aod_disabled=true
  send_tron_log=false

  Interactive File values:

  Noninteractive File values:

Battery saver state machine:
  Enabled=false
  mLastChangedIntReason=0
  mLastChangedStrReason=null
  mBootCompleted=true
  mSettingsLoaded=true
  mBatteryStatusSet=true
  mBatterySaverSnoozing=false
  mIsPowered=true
  mBatteryLevel=82
  mIsBatteryLevelLow=false
  mSettingBatterySaverEnabled=false
  mSettingBatterySaverEnabledSticky=false
  mSettingBatterySaverTriggerThreshold=0

Profile power states: size=0

Wireless Charger Detector State:
  mGravitySensor={Sensor name="Gravity Sensor", vendor="AOSP", version=3, type=9, maxRange=19.6133, resolution=0.0012, power=0.002, minDelay=10000}
  mPoweredWirelessly=false
  mAtRest=false
  mRestX=0.0, mRestY=0.0, mRestZ=0.0
  mDetectionInProgress=false
  mDetectionStartTime=0 (never)
  mMustUpdateRestPosition=false
  mTotalSamples=0
  mMovingSamples=0
  mFirstSampleX=0.0, mFirstSampleY=0.0, mFirstSampleZ=0.0
  mLastSampleX=0.0, mLastSampleY=0.0, mLastSampleZ=0.0