jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/shared/hSpaceCounters.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) 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_HSPACECOUNTERS_HPP

    26 #define SHARE_VM_GC_IMPLEMENTATION_SHARED_HSPACECOUNTERS_HPP

    28 #ifndef SERIALGC

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

    30 #include "memory/generation.hpp"

    31 #include "runtime/perfData.hpp"

    32 #endif

    34 // A HSpaceCounter is a holder class for performance counters

    35 // that track a collections (logical spaces) in a heap;

    37 class HeapSpaceUsedHelper;

    38 class G1SpaceMonitoringSupport;

    40 class HSpaceCounters: public CHeapObj<mtGC> {

    41   friend class VMStructs;

    43  private:

    44   PerfVariable*        _capacity;

    45   PerfVariable*        _used;

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

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

    50   char*             _name_space;

    52  public:

    54   HSpaceCounters(const char* name, int ordinal, size_t max_size,

    55                  size_t initial_capacity, GenerationCounters* gc);

    57   ~HSpaceCounters() {

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

    59   }

    61   inline void update_capacity(size_t v) {

    62     _capacity->set_value(v);

    63   }

    65   inline void update_used(size_t v) {

    66     _used->set_value(v);

    67   }

    69   debug_only(

    70     // for security reasons, we do not allow arbitrary reads from

    71     // the counters as they may live in shared memory.

    72     jlong used() {

    73       return _used->get_value();

    74     }

    75     jlong capacity() {

    76       return _used->get_value();

    77     }

    78   )

    80   inline void update_all(size_t capacity, size_t used) {

    81     update_capacity(capacity);

    82     update_used(used);

    83   }

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

    86 };

    87 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_HSPACECOUNTERS_HPP

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

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

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