Trace Process.killProcessGroup calls in server/am/
to make it easier to find boot time regressions like 21813611
and 21861473.
Process.killProcessGroup is a blocking call and usually takes
about 50ms to finish on a recent device even when the process
group contains only one process. Since Process.killProcessGroup
tends to be called in a loop, the function can be a bottleneck.
Bug: 21813611
Change-Id: I9c1727c0c0b321a30c96321198cc02f438496ded
diff --git a/services/core/java/com/android/server/am/ProcessRecord.java b/services/core/java/com/android/server/am/ProcessRecord.java
index 3acd3a3..bd31a21 100644
--- a/services/core/java/com/android/server/am/ProcessRecord.java
+++ b/services/core/java/com/android/server/am/ProcessRecord.java
@@ -40,6 +40,7 @@
import android.os.IBinder;
import android.os.Process;
import android.os.SystemClock;
+import android.os.Trace;
import android.os.UserHandle;
import android.util.ArrayMap;
import android.util.PrintWriterPrinter;
@@ -536,6 +537,7 @@
void kill(String reason, boolean noisy) {
if (!killedByAm) {
+ Trace.traceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "kill");
if (noisy) {
Slog.i(TAG, "Killing " + toShortString() + " (adj " + setAdj + "): " + reason);
}
@@ -546,6 +548,7 @@
killed = true;
killedByAm = true;
}
+ Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER);
}
}