jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/shared/ageTable.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) 1997, 2010, 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

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    25 #ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_AGETABLE_HPP

    26 #define SHARE_VM_GC_IMPLEMENTATION_SHARED_AGETABLE_HPP

    28 #include "oops/markOop.hpp"

    29 #include "oops/oop.hpp"

    30 #include "runtime/perfData.hpp"

    32 /* Copyright (c) 1992-2009 Oracle and/or its affiliates, and Stanford University.

    33    See the LICENSE file for license information. */

    35 // Age table for adaptive feedback-mediated tenuring (scavenging)

    36 //

    37 // Note: all sizes are in oops

    39 class ageTable VALUE_OBJ_CLASS_SPEC {

    40   friend class VMStructs;

    42  public:

    43   // constants

    44   enum { table_size = markOopDesc::max_age + 1 };

    46   // instance variables

    47   size_t sizes[table_size];

    49   // constructor.  "global" indicates that this is the global age table

    50   // (as opposed to gc-thread-local)

    51   ageTable(bool global = true);

    53   // clear table

    54   void clear();

    56   // add entry

    57   void add(oop p, size_t oop_size) {

    58     int age = p->age();

    59     assert(age > 0 && age < table_size, "invalid age of object");

    60     sizes[age] += oop_size;

    61   }

    63   // Merge another age table with the current one.  Used

    64   // for parallel young generation gc.

    65   void merge(ageTable* subTable);

    66   void merge_par(ageTable* subTable);

    68   // calculate new tenuring threshold based on age information

    69   int compute_tenuring_threshold(size_t survivor_capacity);

    71  private:

    72   PerfVariable* _perf_sizes[table_size];

    73 };

    75 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_AGETABLE_HPP

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

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

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