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 *
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(false /* end_of_gc */, false /* retain */);
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_stats_and_retire(_g1h->alloc_buffer_stats(state),
158 true /* end_of_gc */,
159 false /* retain */);
160 }
161 }
162 }
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1 /*
2 * Copyright (c) 2014, 2015, 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 *
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 }
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