Android系统中启用bootchart

1     # Start bootcharting as soon as possible after the data partition is
2     # mounted to collect more data.
3     mkdir /data/bootchart 0755 shell shell
4     bootchart start

 1 static int do_bootchart_start() {
 2   // We don't care about the content, but we do care that /data/bootchart/enabled actually exists.
 3   std::string start;
 4   if (!android::base::ReadFileToString("/data/bootchart/enabled", &start)) {
 5     LOG(VERBOSE) << "Not bootcharting";
 6     return 0;
 7   }
 8  
 9   g_bootcharting_thread = new std::thread(bootchart_thread_main);
10   return 0;
11 }