Mercurial > hg > truffle
comparison src/share/vm/memory/freeBlockDictionary.hpp @ 6026:9f059abe8cf2
7131629: Generalize the CMS free list code
Summary: Make the FreeChunk, FreeList, TreeList, and BinaryTreeDictionary classes usable outside CMS.
Reviewed-by: brutisso, johnc, jwilhelm
Contributed-by: coleen.phillimore@oracle.com
author | jmasa |
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date | Thu, 29 Mar 2012 19:46:24 -0700 |
parents | src/share/vm/gc_implementation/concurrentMarkSweep/freeBlockDictionary.hpp@f95d63e2154a |
children | f69a5d43dc19 |
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6016:3c91f2c9fd21 | 6026:9f059abe8cf2 |
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1 /* | |
2 * Copyright (c) 2001, 2012, 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 */ | |
24 | |
25 #ifndef SHARE_VM_MEMORY_FREEBLOCKDICTIONARY_HPP | |
26 #define SHARE_VM_MEMORY_FREEBLOCKDICTIONARY_HPP | |
27 | |
28 #include "memory/allocation.hpp" | |
29 #include "runtime/mutex.hpp" | |
30 #include "utilities/debug.hpp" | |
31 #include "utilities/globalDefinitions.hpp" | |
32 #include "utilities/ostream.hpp" | |
33 | |
34 // A FreeBlockDictionary is an abstract superclass that will allow | |
35 // a number of alternative implementations in the future. | |
36 template <class Chunk> | |
37 class FreeBlockDictionary: public CHeapObj { | |
38 public: | |
39 enum Dither { | |
40 atLeast, | |
41 exactly, | |
42 roughly | |
43 }; | |
44 enum DictionaryChoice { | |
45 dictionaryBinaryTree = 0, | |
46 dictionarySplayTree = 1, | |
47 dictionarySkipList = 2 | |
48 }; | |
49 | |
50 private: | |
51 NOT_PRODUCT(Mutex* _lock;) | |
52 | |
53 public: | |
54 virtual void removeChunk(Chunk* fc) = 0; | |
55 virtual Chunk* getChunk(size_t size, Dither dither = atLeast) = 0; | |
56 virtual void returnChunk(Chunk* chunk) = 0; | |
57 virtual size_t totalChunkSize(debug_only(const Mutex* lock)) const = 0; | |
58 virtual size_t maxChunkSize() const = 0; | |
59 virtual size_t minSize() const = 0; | |
60 // Reset the dictionary to the initial conditions for a single | |
61 // block. | |
62 virtual void reset(HeapWord* addr, size_t size) = 0; | |
63 virtual void reset() = 0; | |
64 | |
65 virtual void dictCensusUpdate(size_t size, bool split, bool birth) = 0; | |
66 virtual bool coalDictOverPopulated(size_t size) = 0; | |
67 virtual void beginSweepDictCensus(double coalSurplusPercent, | |
68 float inter_sweep_current, float inter_sweep_estimate, | |
69 float intra__sweep_current) = 0; | |
70 virtual void endSweepDictCensus(double splitSurplusPercent) = 0; | |
71 virtual Chunk* findLargestDict() const = 0; | |
72 // verify that the given chunk is in the dictionary. | |
73 virtual bool verifyChunkInFreeLists(Chunk* tc) const = 0; | |
74 | |
75 // Sigma_{all_free_blocks} (block_size^2) | |
76 virtual double sum_of_squared_block_sizes() const = 0; | |
77 | |
78 virtual Chunk* find_chunk_ends_at(HeapWord* target) const = 0; | |
79 virtual void inc_totalSize(size_t v) = 0; | |
80 virtual void dec_totalSize(size_t v) = 0; | |
81 | |
82 NOT_PRODUCT ( | |
83 virtual size_t sumDictReturnedBytes() = 0; | |
84 virtual void initializeDictReturnedBytes() = 0; | |
85 virtual size_t totalCount() = 0; | |
86 ) | |
87 | |
88 virtual void reportStatistics() const { | |
89 gclog_or_tty->print("No statistics available"); | |
90 } | |
91 | |
92 virtual void printDictCensus() const = 0; | |
93 virtual void print_free_lists(outputStream* st) const = 0; | |
94 | |
95 virtual void verify() const = 0; | |
96 | |
97 Mutex* par_lock() const PRODUCT_RETURN0; | |
98 void set_par_lock(Mutex* lock) PRODUCT_RETURN; | |
99 void verify_par_locked() const PRODUCT_RETURN; | |
100 }; | |
101 | |
102 #endif // SHARE_VM_MEMORY_FREEBLOCKDICTIONARY_HPP |