SWT／ANR问题－－StorageManagerService卡住

此章节主要介绍了vold monitor timeout，StorageManagerService blocked等引起的SWT类型问题的分析SOP

问题特点

1. 两次trace一致
2. vold monitor timeout或是等binder对端vold
3. user版本vold无dump信息
4. 多发于Monkey/APP文件读写/访问外置T卡等情景

解题SOP

 

具体案例

1. 确认问题时间点和关键词

//SWT info.
06-29 12:09:45.004 1205 1234 I watchdog: Blocked in monitor com.android.server.StorageManagerService on foreground thread (android.fg)

2.查找对应时间段内两次trace一致

如，

----- pid 1205 at 2021-06-29 12:09:09 -----
Cmd line: system_server
…

----- pid 1205 at 2021-06-29 12:09:45 -----
Cmd line: system_server
…
"android.fg" prio=5 tid=12 Native
| group="main" sCount=1 dsCount=0 flags=