jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/parallelScavenge/psPromotionManager.inline.hpp@9d7a8ab3736b

6962589: remove breadth first scanning code from parallel gc
Summary: Remove the breadth-first copying order from ParallelScavenge and use depth-first by default.
Reviewed-by: jcoomes, ysr, johnc

     1 /*

     2  * Copyright (c) 2002, 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 inline PSPromotionManager* PSPromotionManager::manager_array(int index) {

    26   assert(_manager_array != NULL, "access of NULL manager_array");

    27   assert(index >= 0 && index <= (int)ParallelGCThreads, "out of range manager_array access");

    28   return _manager_array[index];

    29 }

    31 template <class T>

    32 inline void PSPromotionManager::claim_or_forward_internal_depth(T* p) {

    33   if (p != NULL) { // XXX: error if p != NULL here

    34     oop o = oopDesc::load_decode_heap_oop_not_null(p);

    35     if (o->is_forwarded()) {

    36       o = o->forwardee();

    37       // Card mark

    38       if (PSScavenge::is_obj_in_young((HeapWord*) o)) {

    39         PSScavenge::card_table()->inline_write_ref_field_gc(p, o);

    40       }

    41       oopDesc::encode_store_heap_oop_not_null(p, o);

    42     } else {

    43       push_depth(p);

    44     }

    45   }

    46 }

    48 template <class T>

    49 inline void PSPromotionManager::claim_or_forward_depth(T* p) {

    50   assert(PSScavenge::should_scavenge(p, true), "revisiting object?");

    51   assert(Universe::heap()->kind() == CollectedHeap::ParallelScavengeHeap,

    52          "Sanity");

    53   assert(Universe::heap()->is_in(p), "pointer outside heap");

    55   claim_or_forward_internal_depth(p);

    56 }

    58 inline void PSPromotionManager::process_popped_location_depth(StarTask p) {

    59   if (is_oop_masked(p)) {

    60     assert(PSChunkLargeArrays, "invariant");

    61     oop const old = unmask_chunked_array_oop(p);

    62     process_array_chunk(old);

    63   } else {

    64     if (p.is_narrow()) {

    65       assert(UseCompressedOops, "Error");

    66       PSScavenge::copy_and_push_safe_barrier(this, (narrowOop*)p);

    67     } else {

    68       PSScavenge::copy_and_push_safe_barrier(this, (oop*)p);

    69     }

    70   }

    71 }

    73 #if TASKQUEUE_STATS

    74 void PSPromotionManager::record_steal(StarTask& p) {

    75   if (is_oop_masked(p)) {

    76     ++_masked_steals;

    77   }

    78 }

    79 #endif // TASKQUEUE_STATS

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

src/share/vm/gc_implementation/parallelScavenge/psPromotionManager.inline.hpp@9d7a8ab3736b

src/share/vm/gc_implementation/parallelScavenge/psPromotionManager.inline.hpp