jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/shared/gcStats.hpp@55a0da3d420b

8027675: Full collections with Serial slower in JDK 8 compared to 7u40
Summary: Reduced the number of calls to follow_class_loader and instead marked and pushed the klass holder directly. Also removed unneeded calls to adjust_klass.
Reviewed-by: coleenp, jmasa, mgerdin, tschatzl

     1 /*

     2  * Copyright (c) 2003, 2012, 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_GCSTATS_HPP

    26 #define SHARE_VM_GC_IMPLEMENTATION_SHARED_GCSTATS_HPP

    28 #include "gc_implementation/shared/gcUtil.hpp"

    30 class GCStats : public CHeapObj<mtGC> {

    31  protected:

    32   // Avg amount promoted; used for avoiding promotion undo

    33   // This class does not update deviations if the sample is zero.

    34   AdaptivePaddedNoZeroDevAverage*   _avg_promoted;

    36  public:

    37   GCStats();

    39   enum Name {

    40     GCStatsKind,

    41     CMSGCStatsKind

    42   };

    44   virtual Name kind() {

    45     return GCStatsKind;

    46   }

    48   AdaptivePaddedNoZeroDevAverage*  avg_promoted() const { return _avg_promoted; }

    50   // Average in bytes

    51   size_t average_promoted_in_bytes() const {

    52     return (size_t)_avg_promoted->average();

    53   }

    55   // Padded average in bytes

    56   size_t padded_average_promoted_in_bytes() const {

    57     return (size_t)_avg_promoted->padded_average();

    58   }

    59 };

    61 class CMSGCStats : public GCStats {

    62  public:

    63   CMSGCStats();

    65   virtual Name kind() {

    66     return CMSGCStatsKind;

    67   }

    68 };

    70 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_GCSTATS_HPP

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

src/share/vm/gc_implementation/shared/gcStats.hpp@55a0da3d420b

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