--- old/src/hotspot/share/gc/g1/g1ParScanThreadState.cpp	2019-02-15 14:21:59.516057608 +0100
+++ new/src/hotspot/share/gc/g1/g1ParScanThreadState.cpp	2019-02-15 14:21:59.260049684 +0100
@@ -106,8 +106,12 @@
   delete[] _oops_into_optional_regions;
 }
 
-void G1ParScanThreadState::waste(size_t& wasted, size_t& undo_wasted) {
-  _plab_allocator->waste(wasted, undo_wasted);
+size_t G1ParScanThreadState::lab_waste() const {
+  return _plab_allocator->waste() * HeapWordSize;
+}
+
+size_t G1ParScanThreadState::lab_undo_waste() const {
+  return _plab_allocator->undo_waste() * HeapWordSize;
 }
 
 #ifdef ASSERT