Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/dirtyCardQueue.hpp @ 12343:d55c004e1d4d
8025305: Cleanup CardTableModRefBS usage in G1
Summary: Move some G1 specific code from CardTableModRefBS to G1SATBCardTableModRefBS.
Reviewed-by: brutisso, tschatzl, ehelin
| author | mgerdin |
|---|---|
| date | Tue, 24 Sep 2013 14:46:29 +0200 |
| parents | b9a9ed0f8eeb |
| children | 8847586c9037 |
| rev | line source |
|---|---|
| 342 | 1 /* |
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2 * Copyright (c) 2001, 2012, 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_DIRTYCARDQUEUE_HPP |
| 26 #define SHARE_VM_GC_IMPLEMENTATION_G1_DIRTYCARDQUEUE_HPP | |
| 27 | |
| 28 #include "gc_implementation/g1/ptrQueue.hpp" | |
| 29 #include "memory/allocation.hpp" | |
| 30 | |
| 342 | 31 class FreeIdSet; |
| 32 | |
| 33 // A closure class for processing card table entries. Note that we don't | |
| 34 // require these closure objects to be stack-allocated. | |
| 6197 | 35 class CardTableEntryClosure: public CHeapObj<mtGC> { |
| 342 | 36 public: |
| 37 // Process the card whose card table entry is "card_ptr". If returns | |
| 38 // "false", terminate the iteration early. | |
| 39 virtual bool do_card_ptr(jbyte* card_ptr, int worker_i = 0) = 0; | |
| 40 }; | |
| 41 | |
| 42 // A ptrQueue whose elements are "oops", pointers to object heads. | |
| 43 class DirtyCardQueue: public PtrQueue { | |
| 44 public: | |
| 45 DirtyCardQueue(PtrQueueSet* qset_, bool perm = false) : | |
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46 // Dirty card queues are always active, so we create them with their |
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47 // active field set to true. |
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48 PtrQueue(qset_, perm, true /* active */) { } |
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49 |
| 342 | 50 // Apply the closure to all elements, and reset the index to make the |
| 51 // buffer empty. If a closure application returns "false", return | |
| 52 // "false" immediately, halting the iteration. If "consume" is true, | |
| 53 // deletes processed entries from logs. | |
| 54 bool apply_closure(CardTableEntryClosure* cl, | |
| 55 bool consume = true, | |
| 56 size_t worker_i = 0); | |
| 57 | |
| 58 // Apply the closure to all elements of "buf", down to "index" | |
| 59 // (inclusive.) If returns "false", then a closure application returned | |
| 60 // "false", and we return immediately. If "consume" is true, entries are | |
| 61 // set to NULL as they are processed, so they will not be processed again | |
| 62 // later. | |
| 63 static bool apply_closure_to_buffer(CardTableEntryClosure* cl, | |
| 64 void** buf, size_t index, size_t sz, | |
| 65 bool consume = true, | |
| 66 int worker_i = 0); | |
| 67 void **get_buf() { return _buf;} | |
| 68 void set_buf(void **buf) {_buf = buf;} | |
| 69 size_t get_index() { return _index;} | |
| 70 void reinitialize() { _buf = 0; _sz = 0; _index = 0;} | |
| 71 }; | |
| 72 | |
| 73 | |
| 74 | |
| 75 class DirtyCardQueueSet: public PtrQueueSet { | |
| 76 CardTableEntryClosure* _closure; | |
| 77 | |
| 78 DirtyCardQueue _shared_dirty_card_queue; | |
| 79 | |
| 80 // Override. | |
| 81 bool mut_process_buffer(void** buf); | |
| 82 | |
| 83 // Protected by the _cbl_mon. | |
| 84 FreeIdSet* _free_ids; | |
| 85 | |
| 86 // The number of completed buffers processed by mutator and rs thread, | |
| 87 // respectively. | |
| 88 jint _processed_buffers_mut; | |
| 89 jint _processed_buffers_rs_thread; | |
| 90 | |
| 91 public: | |
| 1111 | 92 DirtyCardQueueSet(bool notify_when_complete = true); |
| 342 | 93 |
| 94 void initialize(Monitor* cbl_mon, Mutex* fl_lock, | |
| 1111 | 95 int process_completed_threshold, |
| 96 int max_completed_queue, | |
| 97 Mutex* lock, PtrQueueSet* fl_owner = NULL); | |
| 342 | 98 |
| 99 // The number of parallel ids that can be claimed to allow collector or | |
| 100 // mutator threads to do card-processing work. | |
| 101 static size_t num_par_ids(); | |
| 102 | |
| 103 static void handle_zero_index_for_thread(JavaThread* t); | |
| 104 | |
| 105 // Register "blk" as "the closure" for all queues. Only one such closure | |
| 106 // is allowed. The "apply_closure_to_completed_buffer" method will apply | |
| 107 // this closure to a completed buffer, and "iterate_closure_all_threads" | |
| 108 // applies it to partially-filled buffers (the latter should only be done | |
| 109 // with the world stopped). | |
| 110 void set_closure(CardTableEntryClosure* closure); | |
| 111 | |
| 112 // If there is a registered closure for buffers, apply it to all entries | |
| 113 // in all currently-active buffers. This should only be applied at a | |
| 114 // safepoint. (Currently must not be called in parallel; this should | |
| 115 // change in the future.) If "consume" is true, processed entries are | |
| 116 // discarded. | |
| 117 void iterate_closure_all_threads(bool consume = true, | |
| 118 size_t worker_i = 0); | |
| 119 | |
| 120 // If there exists some completed buffer, pop it, then apply the | |
| 121 // registered closure to all its elements, nulling out those elements | |
| 122 // processed. If all elements are processed, returns "true". If no | |
| 123 // completed buffers exist, returns false. If a completed buffer exists, | |
| 124 // but is only partially completed before a "yield" happens, the | |
| 125 // partially completed buffer (with its processed elements set to NULL) | |
| 126 // is returned to the completed buffer set, and this call returns false. | |
| 127 bool apply_closure_to_completed_buffer(int worker_i = 0, | |
| 128 int stop_at = 0, | |
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129 bool during_pause = false); |
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130 |
| 1705 | 131 // If there exists some completed buffer, pop it, then apply the |
| 132 // specified closure to all its elements, nulling out those elements | |
| 133 // processed. If all elements are processed, returns "true". If no | |
| 134 // completed buffers exist, returns false. If a completed buffer exists, | |
| 135 // but is only partially completed before a "yield" happens, the | |
| 136 // partially completed buffer (with its processed elements set to NULL) | |
| 137 // is returned to the completed buffer set, and this call returns false. | |
| 138 bool apply_closure_to_completed_buffer(CardTableEntryClosure* cl, | |
| 139 int worker_i = 0, | |
| 140 int stop_at = 0, | |
| 141 bool during_pause = false); | |
| 142 | |
| 143 // Helper routine for the above. | |
| 144 bool apply_closure_to_completed_buffer_helper(CardTableEntryClosure* cl, | |
| 145 int worker_i, | |
| 1111 | 146 BufferNode* nd); |
| 342 | 147 |
| 1111 | 148 BufferNode* get_completed_buffer(int stop_at); |
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149 |
| 342 | 150 // Applies the current closure to all completed buffers, |
| 151 // non-consumptively. | |
| 152 void apply_closure_to_all_completed_buffers(); | |
| 153 | |
| 154 DirtyCardQueue* shared_dirty_card_queue() { | |
| 155 return &_shared_dirty_card_queue; | |
| 156 } | |
| 157 | |
| 1705 | 158 // Deallocate any completed log buffers |
| 159 void clear(); | |
| 160 | |
| 342 | 161 // If a full collection is happening, reset partial logs, and ignore |
| 162 // completed ones: the full collection will make them all irrelevant. | |
| 163 void abandon_logs(); | |
| 164 | |
| 165 // If any threads have partial logs, add them to the global list of logs. | |
| 166 void concatenate_logs(); | |
| 167 void clear_n_completed_buffers() { _n_completed_buffers = 0;} | |
| 168 | |
| 169 jint processed_buffers_mut() { | |
| 170 return _processed_buffers_mut; | |
| 171 } | |
| 172 jint processed_buffers_rs_thread() { | |
| 173 return _processed_buffers_rs_thread; | |
| 174 } | |
| 175 | |
| 176 }; | |
| 1972 | 177 |
| 178 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_DIRTYCARDQUEUE_HPP |