com.android.phone 待机唤醒日志分析

1. 现象描述

大电流的时间是15:11:16到15:11:28

kenel层唤醒，注意下面的关键字”wake up by(唤醒源)”, “suspend exit（退出休眠）”, “suspend entry（进入休眠）”

【开始】<2>[15675.400908] -(0)[1221:system_server][SPM] sec = 50, wakesrc = 0x1e86c5e7 (1)(1)
// 唤醒源 CLDMA_MD
<4>[15676.819467] -(0)[0:swapper/0][ccci1/mcd]wake up by CLDMA_MD L2(0/8)(ff00ff00/ff00ff00)!
// 唤醒时刻 2018-08-10 07:11:16
<6>[15676.935856] (1)[1221:system_server]PM: suspend exit 2018-08-10 07:11:16.082381077 UTC
// 进入休眠标志
<6>[15678.353020] (0)[1221:system_server]PM: suspend entry 2018-08-10 07:11:17.499541923 UTC
【结束】<2>[15678.650925] -(0)[1221:system_server][SPM] md_settle = 99, settle = 99
持续时间 = 15678 - 15675 = 3 秒
【开始】<2>[15678.650925] -(0)[1221:system_server][SPM] sec = 467, wakesrc = 0x1e86c5e7 (1)(1)
// 唤醒时刻 2018-08-10 07:11:28
<6>[15678.786012] (0)[1221:system_server]PM: suspend exit 2018-08-10 07:11:28.072360539 UTC
// 唤醒源 R12_APXGPT1_EVENT_B
<6>[15678.898337] -(0)[0:swapper/0][SPM] wake up by R12_APXGPT1_EVENT_B, timer_out = 313, r13 = 0x4e04012c, debug_flag = 0x11300
// 进入休眠标志
<6>[15679.773745] (0)[1221:system_server]PM: suspend entry 2018-08-10 07:11:29.060090000 UTC
【结束】<2>[15680.070631] -(0)[1221:system_server][SPM] md_settle = 99, settle = 99
持续时间 = 15680- 15678= 2 秒

关键字“onWakeLockAcquired” 唤醒持锁

2,515: 08-10 15:11:16.065884 1162 1260 D PowerManagerNotifier: onWakeLockAcquired: flags=1073741825, tag=”alarm“, packageName=android, ownerUid=1000, ownerPid=1162, workSource=WorkSource{1000}
2,517: 08-10 15:11:16.066208 1162 1480 D PowerManagerNotifier: onWakeLockAcquired: flags=1, tag=”RILJ”, packageName=com.android.phone, ownerUid=1001, ownerPid=1706, workSource=null
2,564: 08-10 15:11:16.076377 1162 1204 D PowerManagerNotifier: onWakeLockAcquired: flags=1, tag=”RILJ_ACK_WL”, packageName=com.android.phone, ownerUid=1001, ownerPid=1706, workSource=null
2,598: 08-10 15:11:28.062167 1162 1203 D PowerManagerNotifier: onWakeLockAcquired: flags=1, tag=”RILJ_ACK_WL”, packageName=com.android.phone, ownerUid=1001, ownerPid=1706, workSource=null
2,609: 08-10 15:11:28.070773 1162 1480 D PowerManagerNotifier: onWakeLockAcquired: flags=1, tag=”RILJ”, packageName=com.android.phone, ownerUid=1001, ownerPid=1706, workSource=null

大电流的时间是15:11:16到15:11:28
其中
1. 15:11:16时刻发生了一个 3 秒持续时长的台阶电流
2. 15:11:28时刻发生了一个 2 秒持续时长的台阶电流
3. 上述看是“com.android.phone”在活动导致