jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/heapRegionSeq.inline.hpp@15c5903cf9e1

6865703: G1: Parallelize hot card cache cleanup
Summary: Have the GC worker threads clear the hot card cache in parallel by having each worker thread claim a chunk of the card cache and process the cards in that chunk. The size of the chunks that each thread will claim is determined at VM initialization from the size of the card cache and the number of worker threads.
Reviewed-by: jmasa, tonyp

     1 /*

     2  * Copyright 2001-2007 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

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    22  *

    23  */

    25 inline HeapRegion* HeapRegionSeq::addr_to_region(const void* addr) {

    26   assert(_seq_bottom != NULL, "bad _seq_bottom in addr_to_region");

    27   if ((char*) addr >= _seq_bottom) {

    28     size_t diff = (size_t) pointer_delta((HeapWord*) addr,

    29                                          (HeapWord*) _seq_bottom);

    30     int index = (int) (diff >> HeapRegion::LogOfHRGrainWords);

    31     assert(index >= 0, "invariant / paranoia");

    32     if (index < _regions.length()) {

    33       HeapRegion* hr = _regions.at(index);

    34       assert(hr->is_in_reserved(addr),

    35              "addr_to_region is wrong...");

    36       return hr;

    37     }

    38   }

    39   return NULL;

    40 }

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

src/share/vm/gc_implementation/g1/heapRegionSeq.inline.hpp@15c5903cf9e1

src/share/vm/gc_implementation/g1/heapRegionSeq.inline.hpp