--- old/src/share/vm/gc/g1/g1EvacStats.cpp	2017-02-17 11:08:10.808875087 -0500
+++ new/src/share/vm/gc/g1/g1EvacStats.cpp	2017-02-17 11:08:09.608805810 -0500
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -46,18 +46,7 @@
                       _failure_waste * HeapWordSize);
 }
 
-void G1EvacStats::adjust_desired_plab_sz() {
-  log_plab_allocation();
-
-  if (!ResizePLAB) {
-    // Clear accumulators for next round.
-    reset();
-    return;
-  }
-
-  assert(is_object_aligned(max_size()) && min_size() <= max_size(),
-         "PLAB clipping computation may be incorrect");
-
+size_t G1EvacStats::adjust_desired_plab_sz_helper() {
   if (_allocated == 0) {
     assert((_unused == 0),
            "Inconsistency in PLAB stats: "
@@ -109,13 +98,7 @@
 
   size_t const total_waste_allowed = used_for_waste_calculation * TargetPLABWastePct;
   size_t const cur_plab_sz = (size_t)((double)total_waste_allowed / G1LastPLABAverageOccupancy);
-  // Take historical weighted average
-  _filter.sample(cur_plab_sz);
-  _desired_net_plab_sz = MAX2(min_size(), (size_t)_filter.average());
-
-  log_sizing(cur_plab_sz, _desired_net_plab_sz);
-  // Clear accumulators for next round.
-  reset();
+  return cur_plab_sz;
 }
 
 G1EvacStats::G1EvacStats(const char* description, size_t desired_plab_sz_, unsigned wt) :