jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/shared/generationCounters.hpp@c6c601a0f2d6

6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
Summary: Call newly created CollectedHeap::dump_{pre,post}_full_gc before and after every stop-world full collection cycle on GenCollectedHeap and ParallelScavengeHeap. (Support for G1CollectedHeap forthcoming under CR 6810861.) Small modifications to existing heap dumping and class histogram implementation, especially to allow multiple on-the-fly histos/dumps by the VM thread during a single safepoint.
Reviewed-by: jmasa, alanb, mchung

     1 /*

     2  * Copyright 2002-2004 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  *

    23  */

    25 // A GenerationCounter is a holder class for performance counters

    26 // that track a generation

    28 class GenerationCounters: public CHeapObj {

    29   friend class VMStructs;

    31  protected:

    32   PerfVariable*      _current_size;

    33   VirtualSpace*      _virtual_space;

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

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

    37   // PerfStringConstant*     _name;

    38   // PerfConstant*           _min_size;

    39   // PerfConstant*           _max_size;

    40   // PerfConstant*           _spaces;

    42   char*              _name_space;

    44   // This constructor is only meant for use with the PSGenerationCounters

    45   // constructor.  The need for such an constructor should be eliminated

    46   // when VirtualSpace and PSVirtualSpace are unified.

    47   GenerationCounters() : _name_space(NULL), _current_size(NULL), _virtual_space(NULL) {}

    48  public:

    50   GenerationCounters(const char* name, int ordinal, int spaces,

    51                      VirtualSpace* v);

    53   ~GenerationCounters() {

    54     if (_name_space != NULL) FREE_C_HEAP_ARRAY(char, _name_space);

    55   }

    57   virtual void update_all() {

    58     _current_size->set_value(_virtual_space->committed_size());

    59   }

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

    62 };

Mercurial > jdk8-mips64-public > hotspot / file revision

src/share/vm/gc_implementation/shared/generationCounters.hpp@c6c601a0f2d6

src/share/vm/gc_implementation/shared/generationCounters.hpp