Mon, 08 Dec 2014 18:57:33 +0100
8067655: Clean up G1 remembered set oop iteration
Summary: Pass on the static type G1ParPushHeapRSClosure to allow oop_iterate devirtualization
Reviewed-by: jmasa, kbarrett
sjohanss@7118 | 1 | /* |
sjohanss@7118 | 2 | * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
sjohanss@7118 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
sjohanss@7118 | 4 | * |
sjohanss@7118 | 5 | * This code is free software; you can redistribute it and/or modify it |
sjohanss@7118 | 6 | * under the terms of the GNU General Public License version 2 only, as |
sjohanss@7118 | 7 | * published by the Free Software Foundation. |
sjohanss@7118 | 8 | * |
sjohanss@7118 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
sjohanss@7118 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
sjohanss@7118 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
sjohanss@7118 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
sjohanss@7118 | 13 | * accompanied this code). |
sjohanss@7118 | 14 | * |
sjohanss@7118 | 15 | * You should have received a copy of the GNU General Public License version |
sjohanss@7118 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
sjohanss@7118 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
sjohanss@7118 | 18 | * |
sjohanss@7118 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
sjohanss@7118 | 20 | * or visit www.oracle.com if you need additional information or have any |
sjohanss@7118 | 21 | * questions. |
sjohanss@7118 | 22 | * |
sjohanss@7118 | 23 | */ |
sjohanss@7118 | 24 | |
sjohanss@7118 | 25 | #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1ALLOCATOR_HPP |
sjohanss@7118 | 26 | #define SHARE_VM_GC_IMPLEMENTATION_G1_G1ALLOCATOR_HPP |
sjohanss@7118 | 27 | |
sjohanss@7118 | 28 | #include "gc_implementation/g1/g1AllocationContext.hpp" |
sjohanss@7118 | 29 | #include "gc_implementation/g1/g1AllocRegion.hpp" |
sjohanss@7118 | 30 | #include "gc_implementation/shared/parGCAllocBuffer.hpp" |
sjohanss@7118 | 31 | |
sjohanss@7118 | 32 | enum GCAllocPurpose { |
sjohanss@7118 | 33 | GCAllocForTenured, |
sjohanss@7118 | 34 | GCAllocForSurvived, |
sjohanss@7118 | 35 | GCAllocPurposeCount |
sjohanss@7118 | 36 | }; |
sjohanss@7118 | 37 | |
sjohanss@7118 | 38 | // Base class for G1 allocators. |
sjohanss@7118 | 39 | class G1Allocator : public CHeapObj<mtGC> { |
sjohanss@7118 | 40 | friend class VMStructs; |
sjohanss@7118 | 41 | protected: |
sjohanss@7118 | 42 | G1CollectedHeap* _g1h; |
sjohanss@7118 | 43 | |
sjohanss@7118 | 44 | // Outside of GC pauses, the number of bytes used in all regions other |
sjohanss@7118 | 45 | // than the current allocation region. |
sjohanss@7118 | 46 | size_t _summary_bytes_used; |
sjohanss@7118 | 47 | |
sjohanss@7118 | 48 | public: |
sjohanss@7118 | 49 | G1Allocator(G1CollectedHeap* heap) : |
sjohanss@7118 | 50 | _g1h(heap), _summary_bytes_used(0) { } |
sjohanss@7118 | 51 | |
sjohanss@7118 | 52 | static G1Allocator* create_allocator(G1CollectedHeap* g1h); |
sjohanss@7118 | 53 | |
sjohanss@7118 | 54 | virtual void init_mutator_alloc_region() = 0; |
sjohanss@7118 | 55 | virtual void release_mutator_alloc_region() = 0; |
sjohanss@7118 | 56 | |
sjohanss@7118 | 57 | virtual void init_gc_alloc_regions(EvacuationInfo& evacuation_info) = 0; |
sjohanss@7118 | 58 | virtual void release_gc_alloc_regions(uint no_of_gc_workers, EvacuationInfo& evacuation_info) = 0; |
sjohanss@7118 | 59 | virtual void abandon_gc_alloc_regions() = 0; |
sjohanss@7118 | 60 | |
sjohanss@7118 | 61 | virtual MutatorAllocRegion* mutator_alloc_region(AllocationContext_t context) = 0; |
sjohanss@7118 | 62 | virtual SurvivorGCAllocRegion* survivor_gc_alloc_region(AllocationContext_t context) = 0; |
sjohanss@7118 | 63 | virtual OldGCAllocRegion* old_gc_alloc_region(AllocationContext_t context) = 0; |
sjohanss@7118 | 64 | virtual size_t used() = 0; |
sjohanss@7118 | 65 | virtual bool is_retained_old_region(HeapRegion* hr) = 0; |
sjohanss@7118 | 66 | |
sjohanss@7118 | 67 | void reuse_retained_old_region(EvacuationInfo& evacuation_info, |
sjohanss@7118 | 68 | OldGCAllocRegion* old, |
sjohanss@7118 | 69 | HeapRegion** retained); |
sjohanss@7118 | 70 | |
sjohanss@7118 | 71 | size_t used_unlocked() const { |
sjohanss@7118 | 72 | return _summary_bytes_used; |
sjohanss@7118 | 73 | } |
sjohanss@7118 | 74 | |
sjohanss@7118 | 75 | void increase_used(size_t bytes) { |
sjohanss@7118 | 76 | _summary_bytes_used += bytes; |
sjohanss@7118 | 77 | } |
sjohanss@7118 | 78 | |
sjohanss@7118 | 79 | void decrease_used(size_t bytes) { |
sjohanss@7118 | 80 | assert(_summary_bytes_used >= bytes, |
sjohanss@7118 | 81 | err_msg("invariant: _summary_bytes_used: "SIZE_FORMAT" should be >= bytes: "SIZE_FORMAT, |
sjohanss@7118 | 82 | _summary_bytes_used, bytes)); |
sjohanss@7118 | 83 | _summary_bytes_used -= bytes; |
sjohanss@7118 | 84 | } |
sjohanss@7118 | 85 | |
sjohanss@7118 | 86 | void set_used(size_t bytes) { |
sjohanss@7118 | 87 | _summary_bytes_used = bytes; |
sjohanss@7118 | 88 | } |
sjohanss@7131 | 89 | |
sjohanss@7131 | 90 | virtual HeapRegion* new_heap_region(uint hrs_index, |
sjohanss@7131 | 91 | G1BlockOffsetSharedArray* sharedOffsetArray, |
sjohanss@7131 | 92 | MemRegion mr) { |
sjohanss@7131 | 93 | return new HeapRegion(hrs_index, sharedOffsetArray, mr); |
sjohanss@7131 | 94 | } |
sjohanss@7118 | 95 | }; |
sjohanss@7118 | 96 | |
sjohanss@7118 | 97 | // The default allocator for G1. |
sjohanss@7118 | 98 | class G1DefaultAllocator : public G1Allocator { |
sjohanss@7118 | 99 | protected: |
sjohanss@7118 | 100 | // Alloc region used to satisfy mutator allocation requests. |
sjohanss@7118 | 101 | MutatorAllocRegion _mutator_alloc_region; |
sjohanss@7118 | 102 | |
sjohanss@7118 | 103 | // Alloc region used to satisfy allocation requests by the GC for |
sjohanss@7118 | 104 | // survivor objects. |
sjohanss@7118 | 105 | SurvivorGCAllocRegion _survivor_gc_alloc_region; |
sjohanss@7118 | 106 | |
sjohanss@7118 | 107 | // Alloc region used to satisfy allocation requests by the GC for |
sjohanss@7118 | 108 | // old objects. |
sjohanss@7118 | 109 | OldGCAllocRegion _old_gc_alloc_region; |
sjohanss@7118 | 110 | |
sjohanss@7118 | 111 | HeapRegion* _retained_old_gc_alloc_region; |
sjohanss@7118 | 112 | public: |
sjohanss@7118 | 113 | G1DefaultAllocator(G1CollectedHeap* heap) : G1Allocator(heap), _retained_old_gc_alloc_region(NULL) { } |
sjohanss@7118 | 114 | |
sjohanss@7118 | 115 | virtual void init_mutator_alloc_region(); |
sjohanss@7118 | 116 | virtual void release_mutator_alloc_region(); |
sjohanss@7118 | 117 | |
sjohanss@7118 | 118 | virtual void init_gc_alloc_regions(EvacuationInfo& evacuation_info); |
sjohanss@7118 | 119 | virtual void release_gc_alloc_regions(uint no_of_gc_workers, EvacuationInfo& evacuation_info); |
sjohanss@7118 | 120 | virtual void abandon_gc_alloc_regions(); |
sjohanss@7118 | 121 | |
sjohanss@7118 | 122 | virtual bool is_retained_old_region(HeapRegion* hr) { |
sjohanss@7118 | 123 | return _retained_old_gc_alloc_region == hr; |
sjohanss@7118 | 124 | } |
sjohanss@7118 | 125 | |
sjohanss@7118 | 126 | virtual MutatorAllocRegion* mutator_alloc_region(AllocationContext_t context) { |
sjohanss@7118 | 127 | return &_mutator_alloc_region; |
sjohanss@7118 | 128 | } |
sjohanss@7118 | 129 | |
sjohanss@7118 | 130 | virtual SurvivorGCAllocRegion* survivor_gc_alloc_region(AllocationContext_t context) { |
sjohanss@7118 | 131 | return &_survivor_gc_alloc_region; |
sjohanss@7118 | 132 | } |
sjohanss@7118 | 133 | |
sjohanss@7118 | 134 | virtual OldGCAllocRegion* old_gc_alloc_region(AllocationContext_t context) { |
sjohanss@7118 | 135 | return &_old_gc_alloc_region; |
sjohanss@7118 | 136 | } |
sjohanss@7118 | 137 | |
sjohanss@7118 | 138 | virtual size_t used() { |
sjohanss@7118 | 139 | assert(Heap_lock->owner() != NULL, |
sjohanss@7118 | 140 | "Should be owned on this thread's behalf."); |
sjohanss@7118 | 141 | size_t result = _summary_bytes_used; |
sjohanss@7118 | 142 | |
sjohanss@7118 | 143 | // Read only once in case it is set to NULL concurrently |
sjohanss@7118 | 144 | HeapRegion* hr = mutator_alloc_region(AllocationContext::current())->get(); |
sjohanss@7118 | 145 | if (hr != NULL) { |
sjohanss@7118 | 146 | result += hr->used(); |
sjohanss@7118 | 147 | } |
sjohanss@7118 | 148 | return result; |
sjohanss@7118 | 149 | } |
sjohanss@7118 | 150 | }; |
sjohanss@7118 | 151 | |
sjohanss@7118 | 152 | class G1ParGCAllocBuffer: public ParGCAllocBuffer { |
sjohanss@7118 | 153 | private: |
sjohanss@7118 | 154 | bool _retired; |
sjohanss@7118 | 155 | |
sjohanss@7118 | 156 | public: |
sjohanss@7118 | 157 | G1ParGCAllocBuffer(size_t gclab_word_size); |
sjohanss@7118 | 158 | virtual ~G1ParGCAllocBuffer() { |
sjohanss@7118 | 159 | guarantee(_retired, "Allocation buffer has not been retired"); |
sjohanss@7118 | 160 | } |
sjohanss@7118 | 161 | |
sjohanss@7118 | 162 | virtual void set_buf(HeapWord* buf) { |
sjohanss@7118 | 163 | ParGCAllocBuffer::set_buf(buf); |
sjohanss@7118 | 164 | _retired = false; |
sjohanss@7118 | 165 | } |
sjohanss@7118 | 166 | |
sjohanss@7118 | 167 | virtual void retire(bool end_of_gc, bool retain) { |
sjohanss@7118 | 168 | if (_retired) { |
sjohanss@7118 | 169 | return; |
sjohanss@7118 | 170 | } |
sjohanss@7118 | 171 | ParGCAllocBuffer::retire(end_of_gc, retain); |
sjohanss@7118 | 172 | _retired = true; |
sjohanss@7118 | 173 | } |
sjohanss@7118 | 174 | }; |
sjohanss@7118 | 175 | |
sjohanss@7118 | 176 | class G1ParGCAllocator : public CHeapObj<mtGC> { |
sjohanss@7118 | 177 | friend class G1ParScanThreadState; |
sjohanss@7118 | 178 | protected: |
sjohanss@7118 | 179 | G1CollectedHeap* _g1h; |
sjohanss@7118 | 180 | |
sjohanss@7118 | 181 | size_t _alloc_buffer_waste; |
sjohanss@7118 | 182 | size_t _undo_waste; |
sjohanss@7118 | 183 | |
sjohanss@7118 | 184 | void add_to_alloc_buffer_waste(size_t waste) { _alloc_buffer_waste += waste; } |
sjohanss@7118 | 185 | void add_to_undo_waste(size_t waste) { _undo_waste += waste; } |
sjohanss@7118 | 186 | |
sjohanss@7118 | 187 | HeapWord* allocate_slow(GCAllocPurpose purpose, size_t word_sz, AllocationContext_t context); |
sjohanss@7118 | 188 | |
sjohanss@7118 | 189 | virtual void retire_alloc_buffers() = 0; |
sjohanss@7118 | 190 | virtual G1ParGCAllocBuffer* alloc_buffer(GCAllocPurpose purpose, AllocationContext_t context) = 0; |
sjohanss@7118 | 191 | |
sjohanss@7118 | 192 | public: |
sjohanss@7118 | 193 | G1ParGCAllocator(G1CollectedHeap* g1h) : |
sjohanss@7118 | 194 | _g1h(g1h), _alloc_buffer_waste(0), _undo_waste(0) { |
sjohanss@7118 | 195 | } |
sjohanss@7118 | 196 | |
sjohanss@7118 | 197 | static G1ParGCAllocator* create_allocator(G1CollectedHeap* g1h); |
sjohanss@7118 | 198 | |
sjohanss@7118 | 199 | size_t alloc_buffer_waste() { return _alloc_buffer_waste; } |
sjohanss@7118 | 200 | size_t undo_waste() {return _undo_waste; } |
sjohanss@7118 | 201 | |
sjohanss@7118 | 202 | HeapWord* allocate(GCAllocPurpose purpose, size_t word_sz, AllocationContext_t context) { |
sjohanss@7118 | 203 | HeapWord* obj = NULL; |
sjohanss@7118 | 204 | if (purpose == GCAllocForSurvived) { |
sjohanss@7118 | 205 | obj = alloc_buffer(purpose, context)->allocate_aligned(word_sz, SurvivorAlignmentInBytes); |
sjohanss@7118 | 206 | } else { |
sjohanss@7118 | 207 | obj = alloc_buffer(purpose, context)->allocate(word_sz); |
sjohanss@7118 | 208 | } |
sjohanss@7118 | 209 | if (obj != NULL) { |
sjohanss@7118 | 210 | return obj; |
sjohanss@7118 | 211 | } |
sjohanss@7118 | 212 | return allocate_slow(purpose, word_sz, context); |
sjohanss@7118 | 213 | } |
sjohanss@7118 | 214 | |
sjohanss@7118 | 215 | void undo_allocation(GCAllocPurpose purpose, HeapWord* obj, size_t word_sz, AllocationContext_t context) { |
sjohanss@7118 | 216 | if (alloc_buffer(purpose, context)->contains(obj)) { |
sjohanss@7118 | 217 | assert(alloc_buffer(purpose, context)->contains(obj + word_sz - 1), |
sjohanss@7118 | 218 | "should contain whole object"); |
sjohanss@7118 | 219 | alloc_buffer(purpose, context)->undo_allocation(obj, word_sz); |
sjohanss@7118 | 220 | } else { |
sjohanss@7118 | 221 | CollectedHeap::fill_with_object(obj, word_sz); |
sjohanss@7118 | 222 | add_to_undo_waste(word_sz); |
sjohanss@7118 | 223 | } |
sjohanss@7118 | 224 | } |
sjohanss@7118 | 225 | }; |
sjohanss@7118 | 226 | |
sjohanss@7118 | 227 | class G1DefaultParGCAllocator : public G1ParGCAllocator { |
sjohanss@7118 | 228 | G1ParGCAllocBuffer _surviving_alloc_buffer; |
sjohanss@7118 | 229 | G1ParGCAllocBuffer _tenured_alloc_buffer; |
sjohanss@7118 | 230 | G1ParGCAllocBuffer* _alloc_buffers[GCAllocPurposeCount]; |
sjohanss@7118 | 231 | |
sjohanss@7118 | 232 | public: |
sjohanss@7118 | 233 | G1DefaultParGCAllocator(G1CollectedHeap* g1h); |
sjohanss@7118 | 234 | |
sjohanss@7118 | 235 | virtual G1ParGCAllocBuffer* alloc_buffer(GCAllocPurpose purpose, AllocationContext_t context) { |
sjohanss@7118 | 236 | return _alloc_buffers[purpose]; |
sjohanss@7118 | 237 | } |
sjohanss@7118 | 238 | |
sjohanss@7118 | 239 | virtual void retire_alloc_buffers() ; |
sjohanss@7118 | 240 | }; |
sjohanss@7118 | 241 | |
sjohanss@7118 | 242 | #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1ALLOCATOR_HPP |