Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1ParScanThreadState.hpp @ 20380:9337d0e7ea4f
8055919: Remove dead code in G1 concurrent marking code
Reviewed-by: jmasa, jwilhelm
| author | tschatzl |
|---|---|
| date | Tue, 02 Sep 2014 15:04:00 +0200 |
| parents | a2328cbebb23 |
| children | 227a9e5e4b4a |
| rev | line source |
|---|---|
| 20223 | 1 /* |
| 2 * Copyright (c) 2014, 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_GC_IMPLEMENTATION_G1_G1PARSCANTHREADSTATE_HPP | |
| 26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1PARSCANTHREADSTATE_HPP | |
| 27 | |
| 28 #include "gc_implementation/g1/dirtyCardQueue.hpp" | |
| 29 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp" | |
| 30 #include "gc_implementation/g1/g1CollectedHeap.hpp" | |
| 31 #include "gc_implementation/g1/g1CollectorPolicy.hpp" | |
| 32 #include "gc_implementation/g1/g1OopClosures.hpp" | |
| 33 #include "gc_implementation/g1/g1RemSet.hpp" | |
| 34 #include "gc_implementation/shared/ageTable.hpp" | |
| 35 #include "memory/allocation.hpp" | |
| 36 #include "oops/oop.hpp" | |
| 37 | |
| 38 class HeapRegion; | |
| 39 class outputStream; | |
| 40 | |
| 41 class G1ParScanThreadState : public StackObj { | |
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42 private: |
| 20223 | 43 G1CollectedHeap* _g1h; |
| 44 RefToScanQueue* _refs; | |
| 45 DirtyCardQueue _dcq; | |
| 46 G1SATBCardTableModRefBS* _ct_bs; | |
| 47 G1RemSet* _g1_rem; | |
| 48 | |
| 49 G1ParGCAllocBuffer _surviving_alloc_buffer; | |
| 50 G1ParGCAllocBuffer _tenured_alloc_buffer; | |
| 51 G1ParGCAllocBuffer* _alloc_buffers[GCAllocPurposeCount]; | |
| 52 ageTable _age_table; | |
| 53 | |
| 54 G1ParScanClosure _scanner; | |
| 55 | |
| 56 size_t _alloc_buffer_waste; | |
| 57 size_t _undo_waste; | |
| 58 | |
| 59 OopsInHeapRegionClosure* _evac_failure_cl; | |
| 60 | |
| 61 int _hash_seed; | |
| 62 uint _queue_num; | |
| 63 | |
| 64 size_t _term_attempts; | |
| 65 | |
| 66 double _start; | |
| 67 double _start_strong_roots; | |
| 68 double _strong_roots_time; | |
| 69 double _start_term; | |
| 70 double _term_time; | |
| 71 | |
| 72 // Map from young-age-index (0 == not young, 1 is youngest) to | |
| 73 // surviving words. base is what we get back from the malloc call | |
| 74 size_t* _surviving_young_words_base; | |
| 75 // this points into the array, as we use the first few entries for padding | |
| 76 size_t* _surviving_young_words; | |
| 77 | |
| 78 #define PADDING_ELEM_NUM (DEFAULT_CACHE_LINE_SIZE / sizeof(size_t)) | |
| 79 | |
| 80 void add_to_alloc_buffer_waste(size_t waste) { _alloc_buffer_waste += waste; } | |
| 81 | |
| 82 void add_to_undo_waste(size_t waste) { _undo_waste += waste; } | |
| 83 | |
| 84 DirtyCardQueue& dirty_card_queue() { return _dcq; } | |
| 85 G1SATBCardTableModRefBS* ctbs() { return _ct_bs; } | |
| 86 | |
| 87 template <class T> inline void immediate_rs_update(HeapRegion* from, T* p, int tid); | |
| 88 | |
| 89 template <class T> void deferred_rs_update(HeapRegion* from, T* p, int tid) { | |
| 90 // If the new value of the field points to the same region or | |
| 91 // is the to-space, we don't need to include it in the Rset updates. | |
| 92 if (!from->is_in_reserved(oopDesc::load_decode_heap_oop(p)) && !from->is_survivor()) { | |
| 93 size_t card_index = ctbs()->index_for(p); | |
| 94 // If the card hasn't been added to the buffer, do it. | |
| 95 if (ctbs()->mark_card_deferred(card_index)) { | |
| 96 dirty_card_queue().enqueue((jbyte*)ctbs()->byte_for_index(card_index)); | |
| 97 } | |
| 98 } | |
| 99 } | |
| 100 | |
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101 public: |
| 20223 | 102 G1ParScanThreadState(G1CollectedHeap* g1h, uint queue_num, ReferenceProcessor* rp); |
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103 ~G1ParScanThreadState(); |
| 20223 | 104 |
| 105 ageTable* age_table() { return &_age_table; } | |
| 106 | |
| 107 G1ParGCAllocBuffer* alloc_buffer(GCAllocPurpose purpose) { | |
| 108 return _alloc_buffers[purpose]; | |
| 109 } | |
| 110 | |
| 111 size_t alloc_buffer_waste() const { return _alloc_buffer_waste; } | |
| 112 size_t undo_waste() const { return _undo_waste; } | |
| 113 | |
| 114 #ifdef ASSERT | |
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115 bool queue_is_empty() const { return _refs->is_empty(); } |
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116 |
| 20223 | 117 bool verify_ref(narrowOop* ref) const; |
| 118 bool verify_ref(oop* ref) const; | |
| 119 bool verify_task(StarTask ref) const; | |
| 120 #endif // ASSERT | |
| 121 | |
| 122 template <class T> void push_on_queue(T* ref) { | |
| 123 assert(verify_ref(ref), "sanity"); | |
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124 _refs->push(ref); |
| 20223 | 125 } |
| 126 | |
| 127 template <class T> inline void update_rs(HeapRegion* from, T* p, int tid); | |
| 128 | |
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129 private: |
| 20223 | 130 |
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131 inline HeapWord* allocate(GCAllocPurpose purpose, size_t word_sz); |
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132 inline HeapWord* allocate_slow(GCAllocPurpose purpose, size_t word_sz); |
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133 inline void undo_allocation(GCAllocPurpose purpose, HeapWord* obj, size_t word_sz); |
| 20223 | 134 |
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135 public: |
| 20223 | 136 |
| 137 void set_evac_failure_closure(OopsInHeapRegionClosure* evac_failure_cl) { | |
| 138 _evac_failure_cl = evac_failure_cl; | |
| 139 } | |
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140 |
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141 OopsInHeapRegionClosure* evac_failure_closure() { return _evac_failure_cl; } |
| 20223 | 142 |
| 143 int* hash_seed() { return &_hash_seed; } | |
| 144 uint queue_num() { return _queue_num; } | |
| 145 | |
| 146 size_t term_attempts() const { return _term_attempts; } | |
| 147 void note_term_attempt() { _term_attempts++; } | |
| 148 | |
| 149 void start_strong_roots() { | |
| 150 _start_strong_roots = os::elapsedTime(); | |
| 151 } | |
| 152 void end_strong_roots() { | |
| 153 _strong_roots_time += (os::elapsedTime() - _start_strong_roots); | |
| 154 } | |
| 155 double strong_roots_time() const { return _strong_roots_time; } | |
| 156 | |
| 157 void start_term_time() { | |
| 158 note_term_attempt(); | |
| 159 _start_term = os::elapsedTime(); | |
| 160 } | |
| 161 void end_term_time() { | |
| 162 _term_time += (os::elapsedTime() - _start_term); | |
| 163 } | |
| 164 double term_time() const { return _term_time; } | |
| 165 | |
| 166 double elapsed_time() const { | |
| 167 return os::elapsedTime() - _start; | |
| 168 } | |
| 169 | |
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170 static void print_termination_stats_hdr(outputStream* const st = gclog_or_tty); |
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171 void print_termination_stats(int i, outputStream* const st = gclog_or_tty) const; |
| 20223 | 172 |
| 173 size_t* surviving_young_words() { | |
| 174 // We add on to hide entry 0 which accumulates surviving words for | |
| 175 // age -1 regions (i.e. non-young ones) | |
| 176 return _surviving_young_words; | |
| 177 } | |
| 178 | |
| 179 private: | |
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180 void retire_alloc_buffers(); |
| 20223 | 181 |
| 182 #define G1_PARTIAL_ARRAY_MASK 0x2 | |
| 183 | |
| 184 inline bool has_partial_array_mask(oop* ref) const { | |
| 185 return ((uintptr_t)ref & G1_PARTIAL_ARRAY_MASK) == G1_PARTIAL_ARRAY_MASK; | |
| 186 } | |
| 187 | |
| 188 // We never encode partial array oops as narrowOop*, so return false immediately. | |
| 189 // This allows the compiler to create optimized code when popping references from | |
| 190 // the work queue. | |
| 191 inline bool has_partial_array_mask(narrowOop* ref) const { | |
| 192 assert(((uintptr_t)ref & G1_PARTIAL_ARRAY_MASK) != G1_PARTIAL_ARRAY_MASK, "Partial array oop reference encoded as narrowOop*"); | |
| 193 return false; | |
| 194 } | |
| 195 | |
| 196 // Only implement set_partial_array_mask() for regular oops, not for narrowOops. | |
| 197 // We always encode partial arrays as regular oop, to allow the | |
| 198 // specialization for has_partial_array_mask() for narrowOops above. | |
| 199 // This means that unintentional use of this method with narrowOops are caught | |
| 200 // by the compiler. | |
| 201 inline oop* set_partial_array_mask(oop obj) const { | |
| 202 assert(((uintptr_t)(void *)obj & G1_PARTIAL_ARRAY_MASK) == 0, "Information loss!"); | |
| 203 return (oop*) ((uintptr_t)(void *)obj | G1_PARTIAL_ARRAY_MASK); | |
| 204 } | |
| 205 | |
| 206 inline oop clear_partial_array_mask(oop* ref) const { | |
| 207 return cast_to_oop((intptr_t)ref & ~G1_PARTIAL_ARRAY_MASK); | |
| 208 } | |
| 209 | |
| 210 inline void do_oop_partial_array(oop* p); | |
| 211 | |
| 212 // This method is applied to the fields of the objects that have just been copied. | |
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213 template <class T> inline void do_oop_evac(T* p, HeapRegion* from); |
| 20223 | 214 |
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215 template <class T> inline void deal_with_reference(T* ref_to_scan); |
| 20223 | 216 |
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217 inline void dispatch_reference(StarTask ref); |
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218 public: |
| 20223 | 219 |
| 220 oop copy_to_survivor_space(oop const obj); | |
| 221 | |
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222 void trim_queue(); |
| 20223 | 223 |
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224 inline void steal_and_trim_queue(RefToScanQueueSet *task_queues); |
| 20223 | 225 }; |
| 226 | |
| 227 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1PARSCANTHREADSTATE_HPP |