20180828 BugReport 查看第一次开机的 odex 事件

1. BugReport 查看第一次开机的 odex 现象

2. 查看方法

1. 新机器或格式化重启的机器，按Power键开机，静止一段时间，至少1小时，越久越好
2. 导出BugReport

echo on
adb bugreport > Bugreport.zip
adb bugreport > Bugreport.txt

1. 点选 add Metrics 添加

The System log containing dex2oat events does not begin until 18:17:39.

4. 观察 dex2oat 现象

1. 电量悬崖式下降 91% 到 54%
2. 电池温度高，尤其亮屏下 dex2oat ，可以感受到手机发热

Temperature
Aug 21 2018
15:35:54 - 15:40:17
+12m18s645ms to +16m41s956ms
active duration: 4m 23s 311ms
1 occurences

Temperature        | Number of times | Total duration
39.0 °C (102.2 °F) | 1               | 4m 23s 311ms  

1. CPU 在该期间是无法休眠的

unknown-wakelock-holder，可以想到被持锁了

Wakelock held by at least 1 app
Aug 21 2018
15:23:35 - 16:20:57
0 to +57m21s867ms
active duration: 57m 17s 427ms
3 occurences

First wakelock acquired by                                                    | Number of times
unknown-wakelock-holder                                                       | 1              
ActivityManager-Sleep                                                         | 1              
*walarm*:com.android.internal.policy.impl.PhoneWindowManager.DELAYED_KEYGUARD | 1              

Only the first app to acquire the wakelock is shown.
Total wakelock duration is not attributed to only those apps listed.
To enable full wakelock reporting, run:
adb shell dumpsys batterystats --enable full-wake-history