wire up sampling profiler to dropbox
When system property "persist.sys.profiler_hz" > 0, SamplingProfilerService is
loaded to SystemServer. It creates a FileObserver, watching any new file in the snapshot
directory. When a snapshot is found, it is put in dropbox and deleted after that.
SamplingProfilerIntegration writes snapshots with headers. Headers are <name, value> pairs,
instantiated by caller.
Currently header format is (also in source comment):
Version: <version number of profiler>\n
Process: <process name>\n
Package: <package name, if exists>\n
Package-Version: <version number of the package, if exists>\n
Build: <fingerprint>\n
\n
<the actual snapshot content begins here...>
BUG=2732642
Change-Id: I2c1699f1728e603de13dbd38f9d8443cd3eecc06
diff --git a/services/java/com/android/server/SystemServer.java b/services/java/com/android/server/SystemServer.java
index e7b8c02..e511d1f 100644
--- a/services/java/com/android/server/SystemServer.java
+++ b/services/java/com/android/server/SystemServer.java
@@ -77,7 +77,7 @@
android.os.Process.THREAD_PRIORITY_FOREGROUND);
BinderInternal.disableBackgroundScheduling(true);
-
+
String factoryTestStr = SystemProperties.get("ro.factorytest");
int factoryTest = "".equals(factoryTestStr) ? SystemServer.FACTORY_TEST_OFF
: Integer.parseInt(factoryTestStr);
@@ -401,6 +401,18 @@
} catch (Throwable e) {
Slog.e(TAG, "Failure starting DiskStats Service", e);
}
+
+ try {
+ // need to add this service even if SamplingProfilerIntegration.isEnabled()
+ // is false, because it is this service that detects system property change and
+ // turns on SamplingProfilerIntegration. Plus, when sampling profiler doesn't work,
+ // there is little overhead for running this service.
+ Slog.i(TAG, "SamplingProfiler Service");
+ ServiceManager.addService("samplingprofiler",
+ new SamplingProfilerService(context));
+ } catch (Throwable e) {
+ Slog.e(TAG, "Failure starting SamplingProfiler Service", e);
+ }
}
// make sure the ADB_ENABLED setting value matches the secure property value
@@ -519,7 +531,7 @@
timer.schedule(new TimerTask() {
@Override
public void run() {
- SamplingProfilerIntegration.writeSnapshot("system_server");
+ SamplingProfilerIntegration.writeSnapshot("system_server", null);
}
}, SNAPSHOT_INTERVAL, SNAPSHOT_INTERVAL);
}
@@ -527,7 +539,7 @@
// The system server has to run all of the time, so it needs to be
// as efficient as possible with its memory usage.
VMRuntime.getRuntime().setTargetHeapUtilization(0.8f);
-
+
System.loadLibrary("android_servers");
init1(args);
}