jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/shared/generationCounters.hpp@b2ef234911c9

7190666: G1: assert(_unused == 0) failed: Inconsistency in PLAB stats
Summary: Reset the fields in ParGCAllocBuffer, that are used for accumulating values for the ResizePLAB sensors in PLABStats, to zero after flushing the values to the PLABStats fields. Flush PLABStats values only when retiring the final allocation buffers prior to disposing of a G1ParScanThreadState object, rather than when retiring every allocation buffer.
Reviewed-by: jwilhelm, jmasa, ysr

     1 /*

     2  * Copyright (c) 2002, 2011, 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

    21  * questions.

    22  *

    23  */

    25 #ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_GENERATIONCOUNTERS_HPP

    26 #define SHARE_VM_GC_IMPLEMENTATION_SHARED_GENERATIONCOUNTERS_HPP

    28 #include "runtime/perfData.hpp"

    29 #include "runtime/virtualspace.hpp"

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

    32 // that track a generation

    34 class GenerationCounters: public CHeapObj<mtGC> {

    35   friend class VMStructs;

    37 private:

    38   void initialize(const char* name, int ordinal, int spaces,

    39                   size_t min_capacity, size_t max_capacity,

    40                   size_t curr_capacity);

    42  protected:

    43   PerfVariable*      _current_size;

    44   VirtualSpace*      _virtual_space;

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

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

    48   // PerfStringConstant*     _name;

    49   // PerfConstant*           _min_size;

    50   // PerfConstant*           _max_size;

    51   // PerfConstant*           _spaces;

    53   char*              _name_space;

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

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

    57   // when VirtualSpace and PSVirtualSpace are unified.

    58   GenerationCounters()

    59              : _name_space(NULL), _current_size(NULL), _virtual_space(NULL) {}

    61   // This constructor is used for subclasses that do not have a space

    62   // associated with them (e.g, in G1).

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

    64                      size_t min_capacity, size_t max_capacity,

    65                      size_t curr_capacity);

    67  public:

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

    69                      VirtualSpace* v);

    71   ~GenerationCounters() {

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

    73   }

    75   virtual void update_all();

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

    79 };

    80 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_GENERATIONCOUNTERS_HPP

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

src/share/vm/gc_implementation/shared/generationCounters.hpp@b2ef234911c9

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