--- old/agent/src/share/classes/sun/jvm/hotspot/gc/g1/G1CollectedHeap.java	2015-07-21 15:44:26.940785504 +0200
+++ new/agent/src/share/classes/sun/jvm/hotspot/gc/g1/G1CollectedHeap.java	2015-07-21 15:44:26.882783766 +0200
@@ -79,7 +79,7 @@
     }
 
     public long used() {
-        return summaryBytesUsedField.getValue();
+        return summaryBytesUsedField.getValue(addr);
     }
 
     public long n_regions() {