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annotate src/share/vm/gc_implementation/concurrentMarkSweep/freeBlockDictionary.hpp @ 3710:4e037604f6ee
use alignment for constants specified in DataPatch.alignment
author | Christian Wimmer <christian.wimmer@oracle.com> |
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date | Mon, 05 Dec 2011 18:15:25 -0800 |
parents | f95d63e2154a |
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0 | 1 /* |
1972 | 2 * Copyright (c) 2001, 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 #ifndef SHARE_VM_GC_IMPLEMENTATION_CONCURRENTMARKSWEEP_FREEBLOCKDICTIONARY_HPP |
26 #define SHARE_VM_GC_IMPLEMENTATION_CONCURRENTMARKSWEEP_FREEBLOCKDICTIONARY_HPP | |
27 | |
28 #include "gc_implementation/concurrentMarkSweep/freeChunk.hpp" | |
29 #include "memory/allocation.hpp" | |
30 #include "memory/memRegion.hpp" | |
31 #include "runtime/mutex.hpp" | |
32 #include "utilities/debug.hpp" | |
33 #include "utilities/globalDefinitions.hpp" | |
34 #include "utilities/ostream.hpp" | |
35 | |
0 | 36 // A FreeBlockDictionary is an abstract superclass that will allow |
37 // a number of alternative implementations in the future. | |
38 class FreeBlockDictionary: public CHeapObj { | |
39 public: | |
40 enum Dither { | |
41 atLeast, | |
42 exactly, | |
43 roughly | |
44 }; | |
45 enum DictionaryChoice { | |
46 dictionaryBinaryTree = 0, | |
47 dictionarySplayTree = 1, | |
48 dictionarySkipList = 2 | |
49 }; | |
50 | |
51 private: | |
52 NOT_PRODUCT(Mutex* _lock;) | |
53 | |
54 public: | |
55 virtual void removeChunk(FreeChunk* fc) = 0; | |
56 virtual FreeChunk* getChunk(size_t size, Dither dither = atLeast) = 0; | |
57 virtual void returnChunk(FreeChunk* chunk) = 0; | |
58 virtual size_t totalChunkSize(debug_only(const Mutex* lock)) const = 0; | |
59 virtual size_t maxChunkSize() const = 0; | |
60 virtual size_t minSize() const = 0; | |
61 // Reset the dictionary to the initial conditions for a single | |
62 // block. | |
63 virtual void reset(HeapWord* addr, size_t size) = 0; | |
64 virtual void reset() = 0; | |
65 | |
66 virtual void dictCensusUpdate(size_t size, bool split, bool birth) = 0; | |
67 virtual bool coalDictOverPopulated(size_t size) = 0; | |
68 virtual void beginSweepDictCensus(double coalSurplusPercent, | |
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69 float inter_sweep_current, float inter_sweep_estimate, |
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70 float intra__sweep_current) = 0; |
0 | 71 virtual void endSweepDictCensus(double splitSurplusPercent) = 0; |
72 virtual FreeChunk* findLargestDict() const = 0; | |
73 // verify that the given chunk is in the dictionary. | |
74 virtual bool verifyChunkInFreeLists(FreeChunk* tc) const = 0; | |
75 | |
76 // Sigma_{all_free_blocks} (block_size^2) | |
77 virtual double sum_of_squared_block_sizes() const = 0; | |
78 | |
79 virtual FreeChunk* find_chunk_ends_at(HeapWord* target) const = 0; | |
80 virtual void inc_totalSize(size_t v) = 0; | |
81 virtual void dec_totalSize(size_t v) = 0; | |
82 | |
83 NOT_PRODUCT ( | |
84 virtual size_t sumDictReturnedBytes() = 0; | |
85 virtual void initializeDictReturnedBytes() = 0; | |
86 virtual size_t totalCount() = 0; | |
87 ) | |
88 | |
89 virtual void reportStatistics() const { | |
90 gclog_or_tty->print("No statistics available"); | |
91 } | |
92 | |
93 virtual void printDictCensus() const = 0; | |
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94 virtual void print_free_lists(outputStream* st) const = 0; |
0 | 95 |
96 virtual void verify() const = 0; | |
97 | |
98 Mutex* par_lock() const PRODUCT_RETURN0; | |
99 void set_par_lock(Mutex* lock) PRODUCT_RETURN; | |
100 void verify_par_locked() const PRODUCT_RETURN; | |
101 }; | |
1972 | 102 |
103 #endif // SHARE_VM_GC_IMPLEMENTATION_CONCURRENTMARKSWEEP_FREEBLOCKDICTIONARY_HPP |