jdk8-mips64-public/hotspot: src/share/vm/memory/genMarkSweep.hpp@4c84d351cca9

8007074: SIGSEGV at ParMarkBitMap::verify_clear()
Summary: Replace the broken large pages implementation on Linux. New flag: -XX:+UseTransparentHugePages - Linux specific flag to turn on transparent huge page hinting with madvise(..., MAP_HUGETLB). Changed behavior: -XX:+UseLargePages - tries to use -XX:+UseTransparentHugePages before trying other large pages implementations (on Linux). Changed behavior: -XX:+UseHugeTLBFS - Use upfront allocation of Large Pages instead of using the broken implementation to dynamically committing large pages. Changed behavior: -XX:LargePageSizeInBytes - Turned off the ability to use this flag on Linux and provides warning to user if set to a value different than the OS chosen large page size. Changed behavior: Setting no large page size - Now defaults to use -XX:UseTransparentHugePages if the OS supports it. Previously, -XX:+UseHugeTLBFS was chosen if the OS was configured to use large pages.
Reviewed-by: tschatzl, dcubed, brutisso

     1 /*

     2  * Copyright (c) 2001, 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

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    25 #ifndef SHARE_VM_MEMORY_GENMARKSWEEP_HPP

    26 #define SHARE_VM_MEMORY_GENMARKSWEEP_HPP

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

    30 class GenMarkSweep : public MarkSweep {

    31   friend class VM_MarkSweep;

    32   friend class G1MarkSweep;

    33  public:

    34   static void invoke_at_safepoint(int level, ReferenceProcessor* rp,

    35                                   bool clear_all_softrefs);

    37  private:

    39   // Mark live objects

    40   static void mark_sweep_phase1(int level, bool clear_all_softrefs);

    41   // Calculate new addresses

    42   static void mark_sweep_phase2();

    43   // Update pointers

    44   static void mark_sweep_phase3(int level);

    45   // Move objects to new positions

    46   static void mark_sweep_phase4();

    48   // Temporary data structures for traversal and storing/restoring marks

    49   static void allocate_stacks();

    50   static void deallocate_stacks();

    51 };

    53 #endif // SHARE_VM_MEMORY_GENMARKSWEEP_HPP

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

src/share/vm/memory/genMarkSweep.hpp@4c84d351cca9

src/share/vm/memory/genMarkSweep.hpp