1 /*
2 * Copyright (c) 2001, 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 #include "precompiled.hpp"
26 #include "gc_implementation/g1/heapRegion.hpp"
27 #include "gc_implementation/g1/heapRegionRemSet.hpp"
28 #include "gc_implementation/g1/sparsePRT.hpp"
29 #include "memory/allocation.inline.hpp"
30 #include "memory/cardTableModRefBS.hpp"
31 #include "memory/space.inline.hpp"
32 #include "runtime/atomic.inline.hpp"
33 #include "runtime/mutexLocker.hpp"
34
35 #define SPARSE_PRT_VERBOSE 0
36
37 #define UNROLL_CARD_LOOPS 1
38
39 void SparsePRTEntry::init(RegionIdx_t region_ind) {
40 _region_ind = region_ind;
41 _next_index = NullEntry;
42
43 #if UNROLL_CARD_LOOPS
44 assert((cards_num() & (UnrollFactor - 1)) == 0, "Invalid number of cards in the entry");
45 for (int i = 0; i < cards_num(); i += UnrollFactor) {
46 _cards[i] = NullEntry;
47 _cards[i + 1] = NullEntry;
48 _cards[i + 2] = NullEntry;
49 _cards[i + 3] = NullEntry;
50 }
51 #else
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1 /*
2 * Copyright (c) 2001, 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 *
23 */
24
25 #include "precompiled.hpp"
26 #include "gc/g1/heapRegion.hpp"
27 #include "gc/g1/heapRegionRemSet.hpp"
28 #include "gc/g1/sparsePRT.hpp"
29 #include "gc/shared/cardTableModRefBS.hpp"
30 #include "gc/shared/space.inline.hpp"
31 #include "memory/allocation.inline.hpp"
32 #include "runtime/atomic.inline.hpp"
33 #include "runtime/mutexLocker.hpp"
34
35 #define SPARSE_PRT_VERBOSE 0
36
37 #define UNROLL_CARD_LOOPS 1
38
39 void SparsePRTEntry::init(RegionIdx_t region_ind) {
40 _region_ind = region_ind;
41 _next_index = NullEntry;
42
43 #if UNROLL_CARD_LOOPS
44 assert((cards_num() & (UnrollFactor - 1)) == 0, "Invalid number of cards in the entry");
45 for (int i = 0; i < cards_num(); i += UnrollFactor) {
46 _cards[i] = NullEntry;
47 _cards[i + 1] = NullEntry;
48 _cards[i + 2] = NullEntry;
49 _cards[i + 3] = NullEntry;
50 }
51 #else
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