本文主要是介绍SP91 Doze参数优化，延长DeviceIdleController.light的IDLE状态驻留，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
唤醒现象
唤醒时刻 09:29
唤醒时刻 09:36
唤醒时刻 09:46
唤醒时刻 10:00
唤醒分析
AlarmManager android 的定时 ELAPSED_REALTIME 唤醒
设置定时器-下一个触发时刻为 1312176
11-29 09:26:23.088195 973 973 V AlarmManager: APP set(PendingIntent{d853147: PendingIntentRecord{aa3cd74 android broadcastIntent}}) : type=3 triggerAtTime=1312176 win=0 tElapsed=1312176 maxElapsed=1312176 interval=0 flags=0x1定时器触发 1312176，故台阶波形产生
11-29 09:29:33.090926 973 1213 V AlarmManager: sending alarm Alarm{fb53c89 type 3 when 1312176 android} success设置定时器-下一个触发时刻为 1492175
11-29 09:29:33.094564 973 973 V AlarmManager: APP set(PendingIntent{d853147: PendingIntentRecord{aa3cd74 android broadcastIntent}}) : type=3 triggerAtTime=1492175 win=0 tElapsed=1492175 maxElapsed=1492175 interval=0 flags=0x1
11-29 09:29:33.094939 973 973 D AlarmManager: set alarm to RTC 1492175 Type: 3定时器触发 1492175，故台阶波形产生
11-29 09:36:22.099205 973 1213 V AlarmManager: sending alarm Alarm{c4e54af type 3 when 1492175 android} success设置定时器-下一个触发时刻为 1912175
11-29 09:36:22.112267 973 973 V AlarmManager: APP set(PendingIntent{d853147: PendingIntentRecord{aa3cd74 android broadcastIntent}}) : type=3 triggerAtTime=1912175 win=0 tElapsed=1912175 maxElapsed=1912175 interval=0 flags=0x1
11-29 09:36:22.112592 973 973 D AlarmManager: set alarm to RTC 1912175 Type: 3定时器触发 1912175，故台阶波形产生
11-29 09:46:23.087939 973 1213 V AlarmManager: sending alarm Alarm{1b58ccb type 3 when 1912175 android} success设置定时器-下一个触发时刻为 2512176
11-29 09:46:23.098627 973 973 V AlarmManager: APP set(PendingIntent{d853147: PendingIntentRecord{aa3cd74 android broadcastIntent}}) : type=3 triggerAtTime=2512176 win=0 tElapsed=2512176 maxElapsed=2512176 interval=0 flags=0x1
11-29 09:46:23.099062 973 973 D AlarmManager: set alarm to RTC 2512176 Type: 3定时器触发 2512176，故台阶波形产生
11-29 10:00:01.093812 973 1213 V AlarmManager: sending alarm Alarm{c7af3c1 type 3 when 2512176 android} success设置定时器-下一个触发时刻为 3352176
11-29 10:00:01.098752 973 973 V AlarmManager: APP set(PendingIntent{d853147: PendingIntentRecord{aa3cd74 android broadcastIntent}}) : type=3 triggerAtTime=3352176 win=0 tElapsed=3352176 maxElapsed=3352176 interval=0 flags=0x1
11-29 10:00:01.099113 973 973 D AlarmManager: set alarm to RTC 3352176 Type: 3定时器触发 3352176，但是波形图不是 10:11 而是 10 ：05
11-29 10:11:54.766607 973 973 V AlarmManager: sending alarm Alarm{22c0f4a type 3 when 3352176 android} successDeviceIdleController.light 定时器 ELAPSED_REALTIME_WAKEUP 唤醒
DeviceIdleController.light 设置定时器-下一个触发时刻为 1464102
11-29 09:24:31.927 973 973 V AlarmManager: APP set with listener(DeviceIdleController.light) : type=2 triggerAtTime=1464102 win=-1 tElapsed=1464102 maxElapsed=1689101 interval=0 flags=0x8
11-29 09:26:23.078 973 1213 D AlarmManager: set alarm to RTC 1464102 Type: 2定时器触发 1464102，故台阶波形产生，且满足波形图时间
11-29 09:29:33.093 973 1213 D AlarmManager: wakeup alarm = Alarm{392b48e type 2 when 1464102 android}; listener package = DeviceIdleController.lightneedGrouping = falseDeviceIdleController.light 设置定时器-下一个触发时刻为 1765269
11-29 09:29:33.111 973 1003 V AlarmManager: APP set with listener(DeviceIdleController.light) : type=2 triggerAtTime=1765269 win=-1 tElapsed=1765269 maxElapsed=1990269 interval=0 flags=0x8定时器触发 1765269，故台阶波形产生，且满足波形图时间
11-29 09:36:22.102 973 1213 D AlarmManager: wakeup alarm = Alarm{98190bc type 2 when 1765269 android}; listener package = DeviceIdleController.lightneedGrouping = falseDeviceIdleController.light 设置定时器-下一个触发时刻为 2474279
11-29 09:36:22.110 973 1003 V AlarmManager: APP set with listener(DeviceIdleController.light) : type=2 triggerAtTime=2474279 win=-1 tElapsed=2474279 maxElapsed=2924273 interval=0 flags=0x8
11-29 09:36:22.111 973 1003 D AlarmManager: set alarm to RTC 2474279 Type: 2DeviceIdleController.light 设置定时器-下一个触发时刻为 2535269
11-29 09:46:23.094 973 1003 V AlarmManager: APP set with listener(DeviceIdleController.light) : type=2 triggerAtTime=2535269 win=-1 tElapsed=2535269 maxElapsed=2580268 interval=0 flags=0x8
11-29 09:46:23.098 973 1003 D AlarmManager: set alarm to RTC 2535269 Type: 2DeviceIdleController.light 设置定时器-下一个触发时刻为 3080487
11-29 09:46:28.312 973 1003 V AlarmManager: APP set with listener(DeviceIdleController.light) : type=2 triggerAtTime=3080487 win=-1 tElapsed=3080487 maxElapsed=3530487 interval=0 flags=0x8定时器触发 3080487，故台阶波形产生，且满足波形图时间
11-29 10:00:01.094 973 1213 D AlarmManager: wakeup alarm = Alarm{ee4c766 type 2 when 3080487 android}; listener package = DeviceIdleController.lightneedGrouping = falseDeviceIdleController.light 设置定时器-下一个触发时刻为 4193320
11-29 10:00:01.145 973 1003 V AlarmManager: APP set with listener(DeviceIdleController.light) : type=2 triggerAtTime=4193320 win=-1 tElapsed=4193320 maxElapsed=4868320 interval=0 flags=0x811-29 10:00:01.146 973 1003 D AlarmManager: set alarm to RTC 4193320 Type: 2题外-定时器类型
83public class AlarmManager {
84 private static final String TAG = "AlarmManager";
85
86 /**
87 * Alarm time in {@link System#currentTimeMillis System.currentTimeMillis()}
88 * (wall clock time in UTC), which will wake up the device when
89 * it goes off.
90 */
91 public static final int RTC_WAKEUP = 0;
92 /**
93 * Alarm time in {@link System#currentTimeMillis System.currentTimeMillis()}
94 * (wall clock time in UTC). This alarm does not wake the
95 * device up; if it goes off while the device is asleep, it will not be
96 * delivered until the next time the device wakes up.
97 */
98 public static final int RTC = 1;
99 /**
100 * Alarm time in {@link android.os.SystemClock#elapsedRealtime
101 * SystemClock.elapsedRealtime()} (time since boot, including sleep),
102 * which will wake up the device when it goes off.
103 */
104 public static final int ELAPSED_REALTIME_WAKEUP = 2;
105 /**
106 * Alarm time in {@link android.os.SystemClock#elapsedRealtime
107 * SystemClock.elapsedRealtime()} (time since boot, including sleep).
108 * This alarm does not wake the device up; if it goes off while the device
109 * is asleep, it will not be delivered until the next time the device
110 * wakes up.
111 */
112 public static final int ELAPSED_REALTIME = 3源码分析
定时器相关源码
/frameworks/base/services/core/java/com/android/server/AlarmManagerService.java
void setImpl(int type, long triggerAtTime, long windowLength, long interval,PendingIntent operation, IAlarmListener directReceiver, String listenerTag,int flags, WorkSource workSource, AlarmManager.AlarmClockInfo alarmClock,int callingUid, String callingPackage) {synchronized (mLock) {if (true) {if (operation == null) {Slog.v(TAG, "APP set with listener(" + listenerTag + ") : type=" + type+ " triggerAtTime=" + triggerAtTime + " win=" + windowLength+ " tElapsed=" + triggerElapsed + " maxElapsed=" + maxElapsed+ " interval=" + interval + " flags=0x" + Integer.toHexString(flags));} else {Slog.v(TAG, "APP set(" + operation + ") : type=" + type+ " triggerAtTime=" + triggerAtTime + " win=" + windowLength+ " tElapsed=" + triggerElapsed + " maxElapsed=" + maxElapsed+ " interval=" + interval + " flags=0x" + Integer.toHexString(flags));}}setImplLocked(type, triggerAtTime, triggerElapsed, windowLength, maxElapsed,interval, operation, directReceiver, listenerTag, flags, true, workSource,alarmClock, callingUid, callingPackage, mNeedGrouping);}DeviceIdleController 设置定时
frameworks\base\services\core\java\com\android\server\DeviceIdleController.java
package com.android.server;/*** Keeps track of device idleness and drives low power mode based on that.*/
public class DeviceIdleController extends SystemServiceimplements AnyMotionDetector.DeviceIdleCallback {void scheduleLightAlarmLocked(long delay) {if (DEBUG) Slog.d(TAG, "scheduleLightAlarmLocked(" + delay + ")");mNextLightAlarmTime = SystemClock.elapsedRealtime() + delay;mAlarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP,mNextLightAlarmTime, "DeviceIdleController.light", mLightAlarmListener, mHandler);}源码修改
我们可以延长 IDLE 模式的驻留时间， 单位时间内减少其LIGHT_STATE_IDLE to LIGHT_STATE_IDLE_MAINTENANCE或LIGHT_WAITING_FOR_NETWORK的次数，优化电池
package com.android.server;/*** Keeps track of device idleness and drives low power mode based on that.*/
public class DeviceIdleController extends SystemServiceimplements AnyMotionDetector.DeviceIdleCallback {private static final boolean DEBUG = true;// LIGHT_IDLE 的驻留时间是 [15, 30]分钟// suhuazhi,20171220, for extend duration of idleLIGHT_IDLE_TIMEOUT = mParser.getLong(KEY_LIGHT_IDLE_TIMEOUT,!COMPRESS_TIME ? 15 * 60 * 1000L : 15 * 1000L);LIGHT_IDLE_FACTOR = mParser.getFloat(KEY_LIGHT_IDLE_FACTOR,3f);LIGHT_MAX_IDLE_TIMEOUT = mParser.getLong(KEY_LIGHT_MAX_IDLE_TIMEOUT,!COMPRESS_TIME ? 30 * 60 * 1000L : 60 * 1000L);// end if
=======================================================================================
// 原来的 LIGHT_IDLE 的驻留时间是 [5, 15]分钟LIGHT_IDLE_TIMEOUT = mParser.getLong(KEY_LIGHT_IDLE_TIMEOUT,!COMPRESS_TIME ? 5 * 60 * 1000L : 15 * 1000L);LIGHT_IDLE_FACTOR = mParser.getFloat(KEY_LIGHT_IDLE_FACTOR,2f);LIGHT_MAX_IDLE_TIMEOUT = mParser.getLong(KEY_LIGHT_MAX_IDLE_TIMEOUT,!COMPRESS_TIME ? 15 * 60 * 1000L : 60 * 1000L);延长对应的 延长 IDLE 模式的驻留时间
======================================================================switch (mLightState) {case LIGHT_STATE_INACTIVE:// Reset the upcoming idle delays.mNextLightIdleDelay = mConstants.LIGHT_IDLE_TIMEOUT;break;case LIGHT_STATE_PRE_IDLE:case LIGHT_STATE_IDLE_MAINTENANCE:.......scheduleLightAlarmLocked(mNextLightIdleDelay);mNextLightIdleDelay = Math.min(mConstants.LIGHT_MAX_IDLE_TIMEOUT,(long)(mNextLightIdleDelay * mConstants.LIGHT_IDLE_FACTOR));if (mNextLightIdleDelay < mConstants.LIGHT_IDLE_TIMEOUT) {mNextLightIdleDelay = mConstants.LIGHT_IDLE_TIMEOUT;}.....if (DEBUG) Slog.d(TAG, "Moved to LIGHT_STATE_IDLE. mNextLightIdleDelay = " + mNextLightIdleDelay);mLightState = LIGHT_STATE_IDLE;break;case LIGHT_STATE_WAITING_FOR_NETWORK:if (mNetworkConnected || mLightState == LIGHT_STATE_WAITING_FOR_NETWORK) {} else {// We'd like to do maintenance, but currently don't have network// connectivity... let's try to wait until the network comes back.// We'll only wait for another full idle period, however, and then give up.scheduleLightAlarmLocked(mNextLightIdleDelay);if (DEBUG) Slog.d(TAG, "Moved to LIGHT_WAITING_FOR_NETWORK. mNextLightIdleDelay = " + mNextLightIdleDelay);mLightState = LIGHT_STATE_WAITING_FOR_NETWORK;}======================================================================优化效果
优化前数据
- Doze的状态切换
3,108: 11-29 14:59:18.953134 964 964 D DeviceIdleController: Moved from STATE_ACTIVE to STATE_INACTIVE
3,111: 11-29 14:59:18.953422 964 964 D DeviceIdleController: Moved from LIGHT_STATE_ACTIVE to LIGHT_STATE_INACTIVE
3,197: 11-29 15:04:20.131240 964 992 D DeviceIdleController: Moved to LIGHT_STATE_IDLE.
<5分钟间隔>
3,229: 11-29 15:09:21.098920 964 992 D DeviceIdleController: Moved to LIGHT_WAITING_FOR_NETWORK.
<15分钟间隔>
3,262: 11-29 15:26:07.132630 964 992 D DeviceIdleController: Moved from LIGHT_STATE_IDLE to LIGHT_STATE_IDLE_MAINTENANCE.
3,276: 11-29 15:26:12.319049 964 992 D DeviceIdleController: Moved to LIGHT_STATE_IDLE.
<10分钟间隔>
3,314: 11-29 15:36:13.122641 964 992 D DeviceIdleController: Moved to LIGHT_WAITING_FOR_NETWORK.
<15分钟间隔>
3,331: 11-29 15:51:14.110387 964 992 D DeviceIdleController: Moved from LIGHT_STATE_IDLE to LIGHT_STATE_IDLE_MAINTENANCE.
3,353: 11-29 15:51:19.297282 964 992 D DeviceIdleController: Moved to LIGHT_STATE_IDLE.
<20分钟间隔>
3,419: 11-29 16:10:21.125400 964 992 D DeviceIdleController: Moved to LIGHT_WAITING_FOR_NETWORK.
<15分钟间隔>
3,455: 11-29 16:26:07.140463 964 992 D DeviceIdleController: Moved from LIGHT_STATE_IDLE to LIGHT_STATE_IDLE_MAINTENANCE.
3,469: 11-29 16:26:12.304652 964 992 D DeviceIdleController: Moved to LIGHT_STATE_IDLE.- 唤醒时间间隔
总时长 1小时半
3,113: 11-29 14:59:18.953767 964 964 V AlarmManager: APP set with listener(DeviceIdleController.light) : type=2 triggerAtTime=565319 win=-1 tElapsed=565319 maxElapsed=790319 interval=0 flags=0x8
3,193: 11-29 15:04:20.104443 964 992 V AlarmManager: APP set with listener(DeviceIdleController.light) : type=2 triggerAtTime=866461 win=-1 tElapsed=866461 maxElapsed=1091461 interval=0 flags=0x8
<5分钟间隔>
3,228: 11-29 15:09:21.098108 964 992 V AlarmManager: APP set with listener(DeviceIdleController.light) : type=2 triggerAtTime=1467463 win=-1 tElapsed=1467463 maxElapsed=1917463 interval=0 flags=0x8
<15分钟间隔>
3,254: 11-29 15:26:07.126923 964 992 V AlarmManager: APP set with listener(DeviceIdleController.light) : type=2 triggerAtTime=1933461 win=-1 tElapsed=1933461 maxElapsed=1978461 interval=0 flags=0x8
3,272: 11-29 15:26:12.313214 964 992 V AlarmManager: APP set with listener(DeviceIdleController.light) : type=2 triggerAtTime=2478678 win=-1 tElapsed=2478678 maxElapsed=2928678 interval=0 flags=0x8
<10分钟间隔>
3,312: 11-29 15:36:13.120175 964 992 V AlarmManager: APP set with listener(DeviceIdleController.light) : type=2 triggerAtTime=3379485 win=-1 tElapsed=3379485 maxElapsed=4054485 interval=0 flags=0x8
<15分钟间隔>
3,329: 11-29 15:51:14.105569 964 992 V AlarmManager: APP set with listener(DeviceIdleController.light) : type=2 triggerAtTime=3495252 win=-1 tElapsed=3495252 maxElapsed=3581337 interval=0 flags=0x8
3,350: 11-29 15:51:19.291767 964 992 V AlarmManager: APP set with listener(DeviceIdleController.light) : type=2 triggerAtTime=4285656 win=-1 tElapsed=4285656 maxElapsed=4960656 interval=0 flags=0x8
<20分钟间隔>
3,416: 11-29 16:10:21.116175 964 992 V AlarmManager: APP set with listener(DeviceIdleController.light) : type=2 triggerAtTime=5427480 win=-1 tElapsed=5427480 maxElapsed=6102480 interval=0 flags=0x8
<15分钟间隔>
3,447: 11-29 16:26:07.128173 964 992 V AlarmManager: APP set with listener(DeviceIdleController.light) : type=2 triggerAtTime=5643059 win=-1 tElapsed=5643059 maxElapsed=5770233 interval=0 flags=0x8
3,465: 11-29 16:26:12.299088 964 992 V AlarmManager: APP set with listener(DeviceIdleController.light) : type=2 triggerAtTime=6378664 win=-1 tElapsed=6378664 maxElapsed=7053664 interval=0 flags=0x8 优化后数据，预计拉长上述的时间间隔
- Doze的状态切换
2,041: 01-01 02:30:51.073802 977 977 D DeviceIdleController: Moved from STATE_ACTIVE to STATE_INACTIVE
2,044: 01-01 02:30:51.074208 977 977 D DeviceIdleController: Moved from LIGHT_STATE_ACTIVE to LIGHT_STATE_INACTIVE
2,866: 12-29 18:42:10.965973 977 977 D DeviceIdleController: Moved from STATE_ACTIVE to STATE_INACTIVE
2,869: 12-29 18:42:10.966274 977 977 D DeviceIdleController: Moved from LIGHT_STATE_ACTIVE to LIGHT_STATE_INACTIVE
<5分钟间隔>
2,934: 12-29 18:47:12.144441 977 1005 D DeviceIdleController: Moved to scheduleLightAlarmLocked mNextLightIdleDelay 900000
2,935: 12-29 18:47:12.144598 977 1005 D DeviceIdleController: Moved to LIGHT_STATE_IDLE. mNextLightIdleDelay 1800000
<15分钟间隔>
2,980: 12-29 19:02:13.117638 977 1005 D DeviceIdleController: Moved to LIGHT_WAITING_FOR_NETWORK. mNextLightIdleDelay = 1800000
<30分钟间隔>
3,015: 12-29 19:32:14.151051 977 1005 D DeviceIdleController: Moved from LIGHT_STATE_IDLE to LIGHT_STATE_IDLE_MAINTENANCE.
3,033: 12-29 19:32:19.319212 977 1005 D DeviceIdleController: Moved to scheduleLightAlarmLocked mNextLightIdleDelay 1800000
3,034: 12-29 19:32:19.319374 977 1005 D DeviceIdleController: Moved to LIGHT_STATE_IDLE. mNextLightIdleDelay 1800000 - 唤醒时间间隔
2,871: 12-29 18:42:10.966672 977 977 V AlarmManager: APP set with listener(DeviceIdleController.light) : type=2 triggerAtTime=3887071 win=-1 tElapsed=3887071 maxElapsed=4112071 interval=0 flags=0x8
<5分钟间隔>
2,931: 12-29 18:47:12.133963 977 1005 V AlarmManager: APP set with listener(DeviceIdleController.light) : type=2 triggerAtTime=4788238 win=-1 tElapsed=4788238 maxElapsed=5463238 interval=0 flags=0x8
<15分钟间隔>
2,978: 12-29 19:02:13.103318 977 1005 V AlarmManager: APP set with listener(DeviceIdleController.light) : type=2 triggerAtTime=6589207 win=-1 tElapsed=6589207 maxElapsed=7939207 interval=0 flags=0x8
<30分钟间隔>
3,013: 12-29 19:32:14.149906 977 1005 V AlarmManager: APP set with listener(DeviceIdleController.light) : type=2 triggerAtTime=6650253 win=-1 tElapsed=6650253 maxElapsed=6695252 interval=0 flags=0x8
3,030: 12-29 19:32:19.313706 977 1005 V AlarmManager: APP set with listener(DeviceIdleController.light) : type=2 triggerAtTime=8395418 win=-1 tElapsed=8395418 maxElapsed=9745418 interval=0 flags=0x8 优化后，相同时长下，唤醒次数少了一半，且主要是拉长LIGHT_STATE_IDLE待机的驻留期，让LIGHT_WAITING_FOR_NETWORK和LIGHT_STATE_IDLE_MAINTENANCE的状态少一些刷新
但是又不对有网络下的MAINTENANCE造成太大影响
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