Fix binder force gc will block binder thread

Symptom: Force gc caused activity launch time took longer
Root Cause: Runtime.getRuntime().gc will block binder thread
Solution: Use VMRuntime.requestConcurrentGC() will not block binder
thread

(cherry pick commit d916c233f0ed615667c1c2338c779e819098d135)

Bug: 20554807
Change-Id: Ia9fecea51d2b0a6635e037b5f2bfcb8eb87f4103

diff --git a/core/java/com/android/internal/os/BinderInternal.java b/core/java/com/android/internal/os/BinderInternal.java
index 240d9df..d77b998 100644 (file)
--- a/core/java/com/android/internal/os/BinderInternal.java
+++ b/core/java/com/android/internal/os/BinderInternal.java
@@ -20,6 +20,8 @@ import android.os.IBinder;
 import android.os.SystemClock;
 import android.util.EventLog;
 
+import dalvik.system.VMRuntime;
+
 import java.lang.ref.WeakReference;
 import java.util.ArrayList;
 
@@ -96,7 +98,7 @@ public class BinderInternal {
     
     public static void forceGc(String reason) {
         EventLog.writeEvent(2741, reason);
-        Runtime.getRuntime().gc();
+        VMRuntime.getRuntime().requestConcurrentGC();
     }
     
     static void forceBinderGc() {