Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/parallelScavenge/psPromotionManager.hpp @ 12029:9766f73e770d
8022880: False sharing between PSPromotionManager instances
Summary: Pad the PSPromotionManager instances in the manager array.
Reviewed-by: brutisso, jmasa
| author | stefank |
|---|---|
| date | Fri, 31 May 2013 14:32:44 +0200 |
| parents | f2110083203d |
| children | 190899198332 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 10405 | 2 * Copyright (c) 2002, 2013, 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_PARALLELSCAVENGE_PSPROMOTIONMANAGER_HPP |
| 26 #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSPROMOTIONMANAGER_HPP | |
| 27 | |
| 28 #include "gc_implementation/parallelScavenge/psPromotionLAB.hpp" | |
| 10405 | 29 #include "gc_implementation/shared/gcTrace.hpp" |
| 30 #include "gc_implementation/shared/copyFailedInfo.hpp" | |
| 1972 | 31 #include "memory/allocation.hpp" |
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32 #include "memory/padded.hpp" |
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33 #include "utilities/globalDefinitions.hpp" |
| 1972 | 34 #include "utilities/taskqueue.hpp" |
| 35 | |
| 0 | 36 // |
| 37 // psPromotionManager is used by a single thread to manage object survival | |
| 38 // during a scavenge. The promotion manager contains thread local data only. | |
| 39 // | |
| 10405 | 40 // NOTE! Be careful when allocating the stacks on cheap. If you are going |
| 0 | 41 // to use a promotion manager in more than one thread, the stacks MUST be |
| 42 // on cheap. This can lead to memory leaks, though, as they are not auto | |
| 43 // deallocated. | |
| 44 // | |
| 45 // FIX ME FIX ME Add a destructor, and don't rely on the user to drain/flush/deallocate! | |
| 46 // | |
| 47 | |
| 48 // Move to some global location | |
| 49 #define HAS_BEEN_MOVED 0x1501d01d | |
| 50 // End move to some global location | |
| 51 | |
| 52 class MutableSpace; | |
| 53 class PSOldGen; | |
| 54 class ParCompactionManager; | |
| 55 | |
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56 class PSPromotionManager VALUE_OBJ_CLASS_SPEC { |
| 0 | 57 friend class PSScavenge; |
| 58 friend class PSRefProcTaskExecutor; | |
| 59 private: | |
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60 static PaddedEnd<PSPromotionManager>* _manager_array; |
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61 static OopStarTaskQueueSet* _stack_array_depth; |
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62 static PSOldGen* _old_gen; |
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63 static MutableSpace* _young_space; |
| 0 | 64 |
| 1665 | 65 #if TASKQUEUE_STATS |
| 66 size_t _masked_pushes; | |
| 67 size_t _masked_steals; | |
| 68 size_t _arrays_chunked; | |
| 69 size_t _array_chunks_processed; | |
| 0 | 70 |
| 1665 | 71 void print_taskqueue_stats(uint i) const; |
| 72 void print_local_stats(uint i) const; | |
| 73 static void print_stats(); | |
| 0 | 74 |
| 1665 | 75 void reset_stats(); |
| 76 #endif // TASKQUEUE_STATS | |
| 0 | 77 |
| 78 PSYoungPromotionLAB _young_lab; | |
| 79 PSOldPromotionLAB _old_lab; | |
| 80 bool _young_gen_is_full; | |
| 81 bool _old_gen_is_full; | |
| 82 | |
| 83 OopStarTaskQueue _claimed_stack_depth; | |
| 6197 | 84 OverflowTaskQueue<oop, mtGC> _claimed_stack_breadth; |
| 0 | 85 |
| 86 bool _totally_drain; | |
| 87 uint _target_stack_size; | |
| 88 | |
| 89 uint _array_chunk_size; | |
| 90 uint _min_array_size_for_chunking; | |
| 91 | |
| 10405 | 92 PromotionFailedInfo _promotion_failed_info; |
| 93 | |
| 0 | 94 // Accessors |
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95 static PSOldGen* old_gen() { return _old_gen; } |
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96 static MutableSpace* young_space() { return _young_space; } |
| 0 | 97 |
| 98 inline static PSPromotionManager* manager_array(int index); | |
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99 template <class T> inline void claim_or_forward_internal_depth(T* p); |
| 0 | 100 |
| 101 // On the task queues we push reference locations as well as | |
| 102 // partially-scanned arrays (in the latter case, we push an oop to | |
| 103 // the from-space image of the array and the length on the | |
| 104 // from-space image indicates how many entries on the array we still | |
| 105 // need to scan; this is basically how ParNew does partial array | |
| 106 // scanning too). To be able to distinguish between reference | |
| 107 // locations and partially-scanned array oops we simply mask the | |
| 108 // latter oops with 0x01. The next three methods do the masking, | |
| 109 // unmasking, and checking whether the oop is masked or not. Notice | |
| 110 // that the signature of the mask and unmask methods looks a bit | |
| 111 // strange, as they accept and return different types (oop and | |
| 112 // oop*). This is because of the difference in types between what | |
| 113 // the task queue holds (oop*) and oops to partially-scanned arrays | |
| 114 // (oop). We do all the necessary casting in the mask / unmask | |
| 115 // methods to avoid sprinkling the rest of the code with more casts. | |
| 116 | |
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117 // These are added to the taskqueue so PS_CHUNKED_ARRAY_OOP_MASK (or any |
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118 // future masks) can't conflict with COMPRESSED_OOP_MASK |
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119 #define PS_CHUNKED_ARRAY_OOP_MASK 0x2 |
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120 |
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121 bool is_oop_masked(StarTask p) { |
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122 // If something is marked chunked it's always treated like wide oop* |
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123 return (((intptr_t)(oop*)p) & PS_CHUNKED_ARRAY_OOP_MASK) == |
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124 PS_CHUNKED_ARRAY_OOP_MASK; |
| 0 | 125 } |
| 126 | |
| 127 oop* mask_chunked_array_oop(oop obj) { | |
| 128 assert(!is_oop_masked((oop*) obj), "invariant"); | |
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129 oop* ret = (oop*) ((uintptr_t)obj | PS_CHUNKED_ARRAY_OOP_MASK); |
| 0 | 130 assert(is_oop_masked(ret), "invariant"); |
| 131 return ret; | |
| 132 } | |
| 133 | |
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134 oop unmask_chunked_array_oop(StarTask p) { |
| 0 | 135 assert(is_oop_masked(p), "invariant"); |
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136 assert(!p.is_narrow(), "chunked array oops cannot be narrow"); |
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137 oop *chunk = (oop*)p; // cast p to oop (uses conversion operator) |
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138 oop ret = oop((oop*)((uintptr_t)chunk & ~PS_CHUNKED_ARRAY_OOP_MASK)); |
| 0 | 139 assert(!is_oop_masked((oop*) ret), "invariant"); |
| 140 return ret; | |
| 141 } | |
| 142 | |
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143 template <class T> void process_array_chunk_work(oop obj, |
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144 int start, int end); |
| 0 | 145 void process_array_chunk(oop old); |
| 146 | |
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147 template <class T> void push_depth(T* p) { |
| 1638 | 148 claimed_stack_depth()->push(p); |
| 0 | 149 } |
| 150 | |
| 151 protected: | |
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152 static OopStarTaskQueueSet* stack_array_depth() { return _stack_array_depth; } |
| 0 | 153 public: |
| 154 // Static | |
| 155 static void initialize(); | |
| 156 | |
| 157 static void pre_scavenge(); | |
| 10405 | 158 static bool post_scavenge(YoungGCTracer& gc_tracer); |
| 0 | 159 |
| 160 static PSPromotionManager* gc_thread_promotion_manager(int index); | |
| 161 static PSPromotionManager* vm_thread_promotion_manager(); | |
| 162 | |
| 163 static bool steal_depth(int queue_num, int* seed, StarTask& t) { | |
| 164 return stack_array_depth()->steal(queue_num, seed, t); | |
| 165 } | |
| 166 | |
| 167 PSPromotionManager(); | |
| 168 | |
| 169 // Accessors | |
| 170 OopStarTaskQueue* claimed_stack_depth() { | |
| 171 return &_claimed_stack_depth; | |
| 172 } | |
| 173 | |
| 174 bool young_gen_is_full() { return _young_gen_is_full; } | |
| 175 | |
| 176 bool old_gen_is_full() { return _old_gen_is_full; } | |
| 177 void set_old_gen_is_full(bool state) { _old_gen_is_full = state; } | |
| 178 | |
| 179 // Promotion methods | |
| 4909 | 180 template<bool promote_immediately> oop copy_to_survivor_space(oop o); |
| 0 | 181 oop oop_promotion_failed(oop obj, markOop obj_mark); |
| 182 | |
| 183 void reset(); | |
| 184 | |
| 185 void flush_labs(); | |
| 186 void drain_stacks(bool totally_drain) { | |
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187 drain_stacks_depth(totally_drain); |
| 0 | 188 } |
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189 public: |
| 0 | 190 void drain_stacks_cond_depth() { |
| 191 if (claimed_stack_depth()->size() > _target_stack_size) { | |
| 192 drain_stacks_depth(false); | |
| 193 } | |
| 194 } | |
| 195 void drain_stacks_depth(bool totally_drain); | |
| 196 | |
| 197 bool stacks_empty() { | |
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198 return claimed_stack_depth()->is_empty(); |
| 0 | 199 } |
| 200 | |
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201 inline void process_popped_location_depth(StarTask p); |
| 0 | 202 |
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203 template <class T> inline void claim_or_forward_depth(T* p); |
| 0 | 204 |
| 1665 | 205 TASKQUEUE_STATS_ONLY(inline void record_steal(StarTask& p);) |
| 0 | 206 }; |
| 1972 | 207 |
| 208 #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSPROMOTIONMANAGER_HPP |