Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/heapRegion.inline.hpp @ 2433:abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
7023151: G1: refactor the code that operates on _cur_alloc_region to be re-used for allocs by the GC threads
7018286: G1: humongous allocation attempts should take the GC locker into account
Summary: First, this change replaces the asymmetric locking scheme in the G1 slow alloc path by a summetric one. Second, it factors out the code that operates on _cur_alloc_region so that it can be re-used for allocations by the GC threads in the future.
Reviewed-by: stefank, brutisso, johnc
| author | tonyp |
|---|---|
| date | Wed, 30 Mar 2011 10:26:59 -0400 |
| parents | f95d63e2154a |
| children | 2ace1c4ee8da |
| rev | line source |
|---|---|
| 342 | 1 /* |
| 1972 | 2 * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved. |
| 342 | 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. |
| 342 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGION_INLINE_HPP |
| 26 #define SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGION_INLINE_HPP | |
| 27 | |
| 342 | 28 inline HeapWord* G1OffsetTableContigSpace::allocate(size_t size) { |
| 29 HeapWord* res = ContiguousSpace::allocate(size); | |
| 30 if (res != NULL) { | |
| 31 _offsets.alloc_block(res, size); | |
| 32 } | |
| 33 return res; | |
| 34 } | |
| 35 | |
| 36 // Because of the requirement of keeping "_offsets" up to date with the | |
| 37 // allocations, we sequentialize these with a lock. Therefore, best if | |
| 38 // this is used for larger LAB allocations only. | |
| 39 inline HeapWord* G1OffsetTableContigSpace::par_allocate(size_t size) { | |
| 40 MutexLocker x(&_par_alloc_lock); | |
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7023069: G1: Introduce symmetric locking in the slow allocation path
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41 // Given that we take the lock no need to use par_allocate() here. |
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abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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42 HeapWord* res = ContiguousSpace::allocate(size); |
| 342 | 43 if (res != NULL) { |
| 44 _offsets.alloc_block(res, size); | |
| 45 } | |
| 46 return res; | |
| 47 } | |
| 48 | |
| 49 inline HeapWord* G1OffsetTableContigSpace::block_start(const void* p) { | |
| 50 return _offsets.block_start(p); | |
| 51 } | |
| 52 | |
| 53 inline HeapWord* | |
| 54 G1OffsetTableContigSpace::block_start_const(const void* p) const { | |
| 55 return _offsets.block_start_const(p); | |
| 56 } | |
| 1972 | 57 |
| 58 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGION_INLINE_HPP |