93 // _retained_old_gc_alloc_region will become NULL. This is what we
94 // want either way so no reason to check explicitly for either
95 // condition.
96 _retained_old_gc_alloc_region = old_gc_alloc_region(context)->release();
97 if (_retained_old_gc_alloc_region != NULL) {
98 _retained_old_gc_alloc_region->record_retained_region();
99 }
100
101 if (ResizePLAB) {
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 G1ParGCAllocBuffer::G1ParGCAllocBuffer(size_t gclab_word_size) :
114 ParGCAllocBuffer(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 G1ParGCAllocBuffer* 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 G1ParGCAllocBuffer* 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 }
|
93 // _retained_old_gc_alloc_region will become NULL. This is what we
94 // want either way so no reason to check explicitly for either
95 // condition.
96 _retained_old_gc_alloc_region = old_gc_alloc_region(context)->release();
97 if (_retained_old_gc_alloc_region != NULL) {
98 _retained_old_gc_alloc_region->record_retained_region();
99 }
100
101 if (ResizePLAB) {
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 ParGCAllocBuffer(gclab_word_size), _retired(true) { }
115
116 HeapWord* G1PLABAllocator::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 G1DefaultPLABAllocator::G1DefaultPLABAllocator(G1CollectedHeap* g1h) :
142 G1PLABAllocator(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 G1DefaultPLABAllocator::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 }
|