Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/parallelScavenge/adjoiningVirtualSpaces.cpp @ 8733:9def4075da6d
8008079: G1: Add nextObject routine to CMBitMapRO and replace nextWord
Summary: Update the task local finger to the start of the next object when marking aborts, in order to avoid the redundant scanning of all 0's when the marking task restarts, if otherwise updating to the next word. In addition, reuse the routine nextObject() in routine iterate().
Reviewed-by: johnc, ysr
Contributed-by: tamao <tao.mao@oracle.com>
| author | tamao |
|---|---|
| date | Tue, 05 Mar 2013 15:36:56 -0800 |
| parents | db8a7163c682 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "gc_implementation/parallelScavenge/adjoiningVirtualSpaces.hpp" | |
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8004674: Add necessary .inline.hpp files to fix non-PCH build
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27 #include "memory/allocation.inline.hpp" |
| 1972 | 28 #include "runtime/java.hpp" |
| 0 | 29 |
| 30 AdjoiningVirtualSpaces::AdjoiningVirtualSpaces(ReservedSpace rs, | |
| 31 size_t min_low_byte_size, | |
| 32 size_t min_high_byte_size, | |
| 33 size_t alignment) : | |
| 34 _reserved_space(rs), _min_low_byte_size(min_low_byte_size), | |
| 35 _min_high_byte_size(min_high_byte_size), _low(0), _high(0), | |
| 36 _alignment(alignment) {} | |
| 37 | |
| 38 // The maximum byte sizes are for the initial layout of the | |
| 39 // virtual spaces and are not the limit on the maximum bytes sizes. | |
| 40 void AdjoiningVirtualSpaces::initialize(size_t max_low_byte_size, | |
| 41 size_t init_low_byte_size, | |
| 42 size_t init_high_byte_size) { | |
| 43 | |
| 44 // The reserved spaces for the two parts of the virtual space. | |
| 45 ReservedSpace old_rs = _reserved_space.first_part(max_low_byte_size); | |
| 46 ReservedSpace young_rs = _reserved_space.last_part(max_low_byte_size); | |
| 47 | |
| 48 _low = new PSVirtualSpace(old_rs, alignment()); | |
| 49 if (!_low->expand_by(init_low_byte_size)) { | |
| 50 vm_exit_during_initialization("Could not reserve enough space for " | |
| 51 "object heap"); | |
| 52 } | |
| 53 | |
| 54 _high = new PSVirtualSpaceHighToLow(young_rs, alignment()); | |
| 55 if (!_high->expand_by(init_high_byte_size)) { | |
| 56 vm_exit_during_initialization("Could not reserve enough space for " | |
| 57 "object heap"); | |
| 58 } | |
| 59 } | |
| 60 | |
| 61 bool AdjoiningVirtualSpaces::adjust_boundary_up(size_t change_in_bytes) { | |
| 62 assert(UseAdaptiveSizePolicy && UseAdaptiveGCBoundary, "runtime check"); | |
| 63 size_t actual_change = low()->expand_into(high(), change_in_bytes); | |
| 64 return actual_change != 0; | |
| 65 } | |
| 66 | |
| 67 bool AdjoiningVirtualSpaces::adjust_boundary_down(size_t change_in_bytes) { | |
| 68 assert(UseAdaptiveSizePolicy && UseAdaptiveGCBoundary, "runtime check"); | |
| 69 size_t actual_change = high()->expand_into(low(), change_in_bytes); | |
| 70 return actual_change != 0; | |
| 71 } |