src/hotspot/share/gc/shenandoah/shenandoahMetrics.hpp
author rkennke
Mon, 10 Dec 2018 15:47:44 +0100
changeset 52925 9c18c9d839d3
child 53244 9807daeb47c4
permissions -rw-r--r--
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental) Reviewed-by: kvn, roland, shade, coleenp, lmesnik, pliden, jgeorge, ihse, erikj Contributed-by: Christine Flood <chf@redhat.com>, Aleksey Shipilev <shade@redhat.com>, Roland Westrelin <rwestrel@redhat.com>, Zhenygu Gu <zgu@redhat.com>, Andrew Haley <aph@redhat.com>, Andrew Dinn <adinn@redhat.com>, Mario Torre <mtorre@redhat.com>, Roman Kennke <rkennke@redhat.com>

/*
 * Copyright (c) 2018, Red Hat, Inc. All rights reserved.
 *
 * 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_SHENANDOAH_SHENANDOAHMETRICS_HPP
#define SHARE_VM_GC_SHENANDOAH_SHENANDOAHMETRICS_HPP

#include "gc/shenandoah/shenandoahHeap.hpp"

class ShenandoahMetrics {
private:
  ShenandoahMetrics() {}

public:
  static double internal_fragmentation();
  static double external_fragmentation();
};

class ShenandoahMetricsSnapshot : public StackObj {
private:
  ShenandoahHeap* _heap;
  size_t _used_before, _used_after;
  double _if_before, _if_after;
  double _ef_before, _ef_after;

public:
  ShenandoahMetricsSnapshot();

  void snap_before();
  void snap_after();
  void print();

  bool is_good_progress(const char *label);
};

#endif //SHARE_VM_GC_SHENANDOAH_SHENANDOAHMETRICS_HPP