--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/gc/g1/g1EvacStats.hpp	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,77 @@
+/*
+ * 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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef SHARE_VM_GC_G1_G1EVACSTATS_HPP
+#define SHARE_VM_GC_G1_G1EVACSTATS_HPP
+
+#include "gc/shared/plab.hpp"
+
+// Records various memory allocation statistics gathered during evacuation.
+class G1EvacStats : public PLABStats {
+ private:
+  size_t _region_end_waste; // Number of words wasted due to skipping to the next region.
+  uint   _regions_filled;   // Number of regions filled completely.
+  size_t _direct_allocated; // Number of words allocated directly into the regions.
+
+  // Number of words in live objects remaining in regions that ultimately suffered an
+  // evacuation failure. This is used in the regions when the regions are made old regions.
+  size_t _failure_used;
+  // Number of words wasted in regions which failed evacuation. This is the sum of space
+  // for objects successfully copied out of the regions (now dead space) plus waste at the
+  // end of regions.
+  size_t _failure_waste;
+
+  virtual void reset() {
+    PLABStats::reset();
+    _region_end_waste = 0;
+    _regions_filled = 0;
+    _direct_allocated = 0;
+    _failure_used = 0;
+    _failure_waste = 0;
+  }
+
+  virtual void log_plab_allocation();
+
+  virtual size_t compute_desired_plab_sz();
+
+ public:
+  G1EvacStats(const char* description, size_t desired_plab_sz_, unsigned wt);
+
+  ~G1EvacStats();
+
+  uint regions_filled() const { return _regions_filled; }
+  size_t region_end_waste() const { return _region_end_waste; }
+  size_t direct_allocated() const { return _direct_allocated; }
+
+  // Amount of space in heapwords used in the failing regions when an evacuation failure happens.
+  size_t failure_used() const { return _failure_used; }
+  // Amount of space in heapwords wasted (unused) in the failing regions when an evacuation failure happens.
+  size_t failure_waste() const { return _failure_waste; }
+
+  inline void add_direct_allocated(size_t value);
+  inline void add_region_end_waste(size_t value);
+  inline void add_failure_used_and_waste(size_t used, size_t waste);
+};
+
+#endif // SHARE_VM_GC_G1_G1EVACSTATS_HPP