jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/shared/spaceCounters.hpp@595c0f60d50d

8029075: String deduplication in G1
Summary: Implementation of JEP 192, http://openjdk.java.net/jeps/192
Reviewed-by: brutisso, tschatzl, coleenp

     1 /*

     2  * Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

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    23  */

    25 #ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_SPACECOUNTERS_HPP

    26 #define SHARE_VM_GC_IMPLEMENTATION_SHARED_SPACECOUNTERS_HPP

    28 #include "utilities/macros.hpp"

    29 #if INCLUDE_ALL_GCS

    30 #include "gc_implementation/shared/generationCounters.hpp"

    31 #include "gc_implementation/shared/immutableSpace.hpp"

    32 #include "gc_implementation/shared/mutableSpace.hpp"

    33 #include "runtime/perfData.hpp"

    34 #endif // INCLUDE_ALL_GCS

    36 // A SpaceCounter is a holder class for performance counters

    37 // that track a space;

    39 class SpaceCounters: public CHeapObj<mtGC> {

    40   friend class VMStructs;

    42  private:

    43   PerfVariable*      _capacity;

    44   PerfVariable*      _used;

    46   // Constant PerfData types don't need to retain a reference.

    47   // However, it's a good idea to document them here.

    48   // PerfConstant*     _size;

    50   MutableSpace*     _object_space;

    51   char*             _name_space;

    53  public:

    55   SpaceCounters(const char* name, int ordinal, size_t max_size,

    56                 MutableSpace* m, GenerationCounters* gc);

    58   ~SpaceCounters() {

    59     if (_name_space != NULL) FREE_C_HEAP_ARRAY(char, _name_space, mtGC);

    60   }

    62   inline void update_capacity() {

    63     _capacity->set_value(_object_space->capacity_in_bytes());

    64   }

    66   inline void update_used() {

    67     _used->set_value(_object_space->used_in_bytes());

    68   }

    70   inline void update_all() {

    71     update_used();

    72     update_capacity();

    73   }

    75   const char* name_space() const        { return _name_space; }

    76 };

    78 class MutableSpaceUsedHelper: public PerfLongSampleHelper {

    79   private:

    80     MutableSpace* _m;

    82   public:

    83     MutableSpaceUsedHelper(MutableSpace* m) : _m(m) { }

    85     inline jlong take_sample() {

    86       return _m->used_in_bytes();

    87     }

    88 };

    90 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_SPACECOUNTERS_HPP

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