1 /*
   2  * Copyright (c) 2018, Red Hat, Inc. All rights reserved.
   3  *
   4  * This code is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License version 2 only, as
   6  * published by the Free Software Foundation.
   7  *
   8  * This code is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  11  * version 2 for more details (a copy is included in the LICENSE file that
  12  * accompanied this code).
  13  *
  14  * You should have received a copy of the GNU General Public License version
  15  * 2 along with this work; if not, write to the Free Software Foundation,
  16  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  17  *
  18  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  19  * or visit www.oracle.com if you need additional information or have any
  20  * questions.
  21  *
  22  */
  23 
  24 #ifndef SHARE_GC_SHENANDOAH_SHENANDOAHMETRICS_HPP
  25 #define SHARE_GC_SHENANDOAH_SHENANDOAHMETRICS_HPP
  26 
  27 #include "gc/shenandoah/shenandoahHeap.hpp"
  28 
  29 class ShenandoahMetrics {
  30 private:
  31   ShenandoahMetrics() {}
  32 
  33 public:
  34   static double internal_fragmentation();
  35   static double external_fragmentation();
  36 };
  37 
  38 class ShenandoahMetricsSnapshot : public StackObj {
  39 private:
  40   ShenandoahHeap* _heap;
  41   size_t _used_before, _used_after;
  42   double _if_before, _if_after;
  43   double _ef_before, _ef_after;
  44 
  45 public:
  46   ShenandoahMetricsSnapshot();
  47 
  48   void snap_before();
  49   void snap_after();
  50   void print();
  51 
  52   bool is_good_progress(const char *label);
  53 };
  54 
  55 #endif // SHARE_GC_SHENANDOAH_SHENANDOAHMETRICS_HPP