jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/concurrentMarkSweep/cmsLockVerifier.hpp@e018e6884bd8

6631166: CMS: better heuristics when combatting fragmentation
Summary: Autonomic per-worker free block cache sizing, tunable coalition policies, fixes to per-size block statistics, retuned gain and bandwidth of some feedback loop filters to allow quicker reactivity to abrupt changes in ambient demand, and other heuristics to reduce fragmentation of the CMS old gen. Also tightened some assertions, including those related to locking.
Reviewed-by: jmasa

     1 /*

     2  * Copyright 2002 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  *

    23  */

    25 ///////////// Locking verification specific to CMS //////////////

    26 // Much like "assert_lock_strong()", except

    27 // that it relaxes the assertion somewhat for the parallel GC case, where

    28 // main GC thread or the CMS thread might hold the lock on behalf of

    29 // the parallel threads.

    30 class CMSLockVerifier: AllStatic {

    31  public:

    32   static void assert_locked(const Mutex* lock, const Mutex* p_lock1, const Mutex* p_lock2)

    33     PRODUCT_RETURN;

    34   static void assert_locked(const Mutex* lock, const Mutex* p_lock) {

    35     assert_locked(lock, p_lock, NULL);

    36   }

    37   static void assert_locked(const Mutex* lock) {

    38     assert_locked(lock, NULL);

    39   }

    40 };

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

src/share/vm/gc_implementation/concurrentMarkSweep/cmsLockVerifier.hpp@e018e6884bd8

src/share/vm/gc_implementation/concurrentMarkSweep/cmsLockVerifier.hpp