102 _g1h->alloc_buffer_stats(InCSetState::Young)->adjust_desired_plab_sz(no_of_gc_workers);
103 _g1h->alloc_buffer_stats(InCSetState::Old)->adjust_desired_plab_sz(no_of_gc_workers);
104 }
105 }
106
107 void G1DefaultAllocator::abandon_gc_alloc_regions() {
108 assert(survivor_gc_alloc_region(AllocationContext::current())->get() == NULL, "pre-condition");
109 assert(old_gc_alloc_region(AllocationContext::current())->get() == NULL, "pre-condition");
110 _retained_old_gc_alloc_region = NULL;
111 }
112
113 G1PLAB::G1PLAB(size_t gclab_word_size) :
114 PLAB(gclab_word_size), _retired(true) { }
115
116 HeapWord* G1ParGCAllocator::allocate_direct_or_new_plab(InCSetState dest,
117 size_t word_sz,
118 AllocationContext_t context) {
119 size_t gclab_word_size = _g1h->desired_plab_sz(dest);
120 if (word_sz * 100 < gclab_word_size * ParallelGCBufferWastePct) {
121 G1PLAB* alloc_buf = alloc_buffer(dest, context);
122 add_to_alloc_buffer_waste(alloc_buf->words_remaining());
123 alloc_buf->retire();
124
125 HeapWord* buf = _g1h->par_allocate_during_gc(dest, gclab_word_size, context);
126 if (buf == NULL) {
127 return NULL; // Let caller handle allocation failure.
128 }
129 // Otherwise.
130 alloc_buf->set_word_size(gclab_word_size);
131 alloc_buf->set_buf(buf);
132
133 HeapWord* const obj = alloc_buf->allocate(word_sz);
134 assert(obj != NULL, "buffer was definitely big enough...");
135 return obj;
136 } else {
137 return _g1h->par_allocate_during_gc(dest, word_sz, context);
138 }
139 }
140
141 G1DefaultParGCAllocator::G1DefaultParGCAllocator(G1CollectedHeap* g1h) :
142 G1ParGCAllocator(g1h),
143 _surviving_alloc_buffer(g1h->desired_plab_sz(InCSetState::Young)),
144 _tenured_alloc_buffer(g1h->desired_plab_sz(InCSetState::Old)) {
145 for (uint state = 0; state < InCSetState::Num; state++) {
146 _alloc_buffers[state] = NULL;
147 }
148 _alloc_buffers[InCSetState::Young] = &_surviving_alloc_buffer;
149 _alloc_buffers[InCSetState::Old] = &_tenured_alloc_buffer;
150 }
151
152 void G1DefaultParGCAllocator::retire_alloc_buffers() {
153 for (uint state = 0; state < InCSetState::Num; state++) {
154 G1PLAB* const buf = _alloc_buffers[state];
155 if (buf != NULL) {
156 add_to_alloc_buffer_waste(buf->words_remaining());
157 buf->flush_and_retire_stats(_g1h->alloc_buffer_stats(state));
158 }
159 }
160 }
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102 _g1h->alloc_buffer_stats(InCSetState::Young)->adjust_desired_plab_sz(no_of_gc_workers);
103 _g1h->alloc_buffer_stats(InCSetState::Old)->adjust_desired_plab_sz(no_of_gc_workers);
104 }
105 }
106
107 void G1DefaultAllocator::abandon_gc_alloc_regions() {
108 assert(survivor_gc_alloc_region(AllocationContext::current())->get() == NULL, "pre-condition");
109 assert(old_gc_alloc_region(AllocationContext::current())->get() == NULL, "pre-condition");
110 _retained_old_gc_alloc_region = NULL;
111 }
112
113 G1PLAB::G1PLAB(size_t gclab_word_size) :
114 PLAB(gclab_word_size), _retired(true) { }
115
116 HeapWord* G1ParGCAllocator::allocate_direct_or_new_plab(InCSetState dest,
117 size_t word_sz,
118 AllocationContext_t context) {
119 size_t gclab_word_size = _g1h->desired_plab_sz(dest);
120 if (word_sz * 100 < gclab_word_size * ParallelGCBufferWastePct) {
121 G1PLAB* alloc_buf = alloc_buffer(dest, context);
122 alloc_buf->retire();
123
124 HeapWord* buf = _g1h->par_allocate_during_gc(dest, gclab_word_size, context);
125 if (buf == NULL) {
126 return NULL; // Let caller handle allocation failure.
127 }
128 // Otherwise.
129 alloc_buf->set_word_size(gclab_word_size);
130 alloc_buf->set_buf(buf);
131
132 HeapWord* const obj = alloc_buf->allocate(word_sz);
133 assert(obj != NULL, "buffer was definitely big enough...");
134 return obj;
135 } else {
136 return _g1h->par_allocate_during_gc(dest, word_sz, context);
137 }
138 }
139
140 G1DefaultParGCAllocator::G1DefaultParGCAllocator(G1CollectedHeap* g1h) :
141 G1ParGCAllocator(g1h),
142 _surviving_alloc_buffer(g1h->desired_plab_sz(InCSetState::Young)),
143 _tenured_alloc_buffer(g1h->desired_plab_sz(InCSetState::Old)) {
144 for (uint state = 0; state < InCSetState::Num; state++) {
145 _alloc_buffers[state] = NULL;
146 }
147 _alloc_buffers[InCSetState::Young] = &_surviving_alloc_buffer;
148 _alloc_buffers[InCSetState::Old] = &_tenured_alloc_buffer;
149 }
150
151 void G1DefaultParGCAllocator::retire_alloc_buffers() {
152 for (uint state = 0; state < InCSetState::Num; state++) {
153 G1PLAB* const buf = _alloc_buffers[state];
154 if (buf != NULL) {
155 buf->flush_and_retire_stats(_g1h->alloc_buffer_stats(state));
156 }
157 }
158 }
159
160 void G1DefaultParGCAllocator::waste(size_t& wasted, size_t& undo_wasted) {
161 wasted = 0;
162 undo_wasted = 0;
163 for (uint state = 0; state < InCSetState::Num; state++) {
164 G1PLAB * const buf = _alloc_buffers[state];
165 if (buf != NULL) {
166 wasted += buf->waste();
167 undo_wasted += buf->undo_waste();
168 }
169 }
170 }
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