Wed, 23 Sep 2009 23:56:15 -0700
Merge
duke@435 | 1 | /* |
xdono@631 | 2 | * Copyright 2001-2008 Sun Microsystems, Inc. All Rights Reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
duke@435 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
duke@435 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
duke@435 | 21 | * have any questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
duke@435 | 25 | // A FreeBlockDictionary is an abstract superclass that will allow |
duke@435 | 26 | // a number of alternative implementations in the future. |
duke@435 | 27 | class FreeBlockDictionary: public CHeapObj { |
duke@435 | 28 | public: |
duke@435 | 29 | enum Dither { |
duke@435 | 30 | atLeast, |
duke@435 | 31 | exactly, |
duke@435 | 32 | roughly |
duke@435 | 33 | }; |
duke@435 | 34 | enum DictionaryChoice { |
duke@435 | 35 | dictionaryBinaryTree = 0, |
duke@435 | 36 | dictionarySplayTree = 1, |
duke@435 | 37 | dictionarySkipList = 2 |
duke@435 | 38 | }; |
duke@435 | 39 | |
duke@435 | 40 | private: |
duke@435 | 41 | NOT_PRODUCT(Mutex* _lock;) |
duke@435 | 42 | |
duke@435 | 43 | public: |
duke@435 | 44 | virtual void removeChunk(FreeChunk* fc) = 0; |
duke@435 | 45 | virtual FreeChunk* getChunk(size_t size, Dither dither = atLeast) = 0; |
duke@435 | 46 | virtual void returnChunk(FreeChunk* chunk) = 0; |
duke@435 | 47 | virtual size_t totalChunkSize(debug_only(const Mutex* lock)) const = 0; |
duke@435 | 48 | virtual size_t maxChunkSize() const = 0; |
duke@435 | 49 | virtual size_t minSize() const = 0; |
duke@435 | 50 | // Reset the dictionary to the initial conditions for a single |
duke@435 | 51 | // block. |
duke@435 | 52 | virtual void reset(HeapWord* addr, size_t size) = 0; |
duke@435 | 53 | virtual void reset() = 0; |
duke@435 | 54 | |
duke@435 | 55 | virtual void dictCensusUpdate(size_t size, bool split, bool birth) = 0; |
duke@435 | 56 | virtual bool coalDictOverPopulated(size_t size) = 0; |
duke@435 | 57 | virtual void beginSweepDictCensus(double coalSurplusPercent, |
duke@435 | 58 | float sweep_current, float sweep_ewstimate) = 0; |
duke@435 | 59 | virtual void endSweepDictCensus(double splitSurplusPercent) = 0; |
duke@435 | 60 | virtual FreeChunk* findLargestDict() const = 0; |
duke@435 | 61 | // verify that the given chunk is in the dictionary. |
duke@435 | 62 | virtual bool verifyChunkInFreeLists(FreeChunk* tc) const = 0; |
duke@435 | 63 | |
duke@435 | 64 | // Sigma_{all_free_blocks} (block_size^2) |
duke@435 | 65 | virtual double sum_of_squared_block_sizes() const = 0; |
duke@435 | 66 | |
duke@435 | 67 | virtual FreeChunk* find_chunk_ends_at(HeapWord* target) const = 0; |
duke@435 | 68 | virtual void inc_totalSize(size_t v) = 0; |
duke@435 | 69 | virtual void dec_totalSize(size_t v) = 0; |
duke@435 | 70 | |
duke@435 | 71 | NOT_PRODUCT ( |
duke@435 | 72 | virtual size_t sumDictReturnedBytes() = 0; |
duke@435 | 73 | virtual void initializeDictReturnedBytes() = 0; |
duke@435 | 74 | virtual size_t totalCount() = 0; |
duke@435 | 75 | ) |
duke@435 | 76 | |
duke@435 | 77 | virtual void reportStatistics() const { |
duke@435 | 78 | gclog_or_tty->print("No statistics available"); |
duke@435 | 79 | } |
duke@435 | 80 | |
duke@435 | 81 | virtual void printDictCensus() const = 0; |
duke@435 | 82 | |
duke@435 | 83 | virtual void verify() const = 0; |
duke@435 | 84 | |
duke@435 | 85 | Mutex* par_lock() const PRODUCT_RETURN0; |
duke@435 | 86 | void set_par_lock(Mutex* lock) PRODUCT_RETURN; |
duke@435 | 87 | void verify_par_locked() const PRODUCT_RETURN; |
duke@435 | 88 | }; |