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_VM_GC_SHENANDOAH_SHENANDOAHMETRICS_HPP

    25 #define SHARE_VM_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_VM_GC_SHENANDOAH_SHENANDOAHMETRICS_HPP