Mercurial > hg > graal-jvmci-8
annotate src/share/vm/memory/genOopClosures.inline.hpp @ 1994:6cd6d394f280
7001033: assert(gch->gc_cause() == GCCause::_scavenge_alot || !gch->incremental_collection_failed())
7002546: regression on SpecJbb2005 on 7b118 comparing to 7b117 on small heaps
Summary: Relaxed assertion checking related to incremental_collection_failed flag to allow for ExplicitGCInvokesConcurrent behaviour where we do not want a failing scavenge to bail to a stop-world collection. Parameterized incremental_collection_will_fail() so we can selectively use, or not use, as appropriate, the statistical prediction at specific use sites. This essentially reverts the scavenge bail-out logic to what it was prior to some recent changes that had inadvertently started using the statistical prediction which can be noisy in the presence of bursty loads. Added some associated verbose non-product debugging messages.
Reviewed-by: johnc, tonyp
author | ysr |
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date | Tue, 07 Dec 2010 21:55:53 -0800 |
parents | f95d63e2154a |
children | da91efe96a93 |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
1552
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_MEMORY_GENOOPCLOSURES_INLINE_HPP |
26 #define SHARE_VM_MEMORY_GENOOPCLOSURES_INLINE_HPP | |
27 | |
28 #include "memory/cardTableRS.hpp" | |
29 #include "memory/defNewGeneration.hpp" | |
30 #include "memory/genCollectedHeap.hpp" | |
31 #include "memory/genOopClosures.hpp" | |
32 #include "memory/genRemSet.hpp" | |
33 #include "memory/generation.hpp" | |
34 #include "memory/sharedHeap.hpp" | |
35 #include "memory/space.hpp" | |
36 | |
0 | 37 inline OopsInGenClosure::OopsInGenClosure(Generation* gen) : |
38 OopClosure(gen->ref_processor()), _orig_gen(gen), _rs(NULL) { | |
39 set_generation(gen); | |
40 } | |
41 | |
42 inline void OopsInGenClosure::set_generation(Generation* gen) { | |
43 _gen = gen; | |
44 _gen_boundary = _gen->reserved().start(); | |
45 // Barrier set for the heap, must be set after heap is initialized | |
46 if (_rs == NULL) { | |
47 GenRemSet* rs = SharedHeap::heap()->rem_set(); | |
48 assert(rs->rs_kind() == GenRemSet::CardTable, "Wrong rem set kind"); | |
49 _rs = (CardTableRS*)rs; | |
50 } | |
51 } | |
52 | |
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53 template <class T> inline void OopsInGenClosure::do_barrier(T* p) { |
0 | 54 assert(generation()->is_in_reserved(p), "expected ref in generation"); |
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55 T heap_oop = oopDesc::load_heap_oop(p); |
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56 assert(!oopDesc::is_null(heap_oop), "expected non-null oop"); |
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57 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
0 | 58 // If p points to a younger generation, mark the card. |
59 if ((HeapWord*)obj < _gen_boundary) { | |
60 _rs->inline_write_ref_field_gc(p, obj); | |
61 } | |
62 } | |
63 | |
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64 template <class T> inline void OopsInGenClosure::par_do_barrier(T* p) { |
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65 assert(generation()->is_in_reserved(p), "expected ref in generation"); |
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66 T heap_oop = oopDesc::load_heap_oop(p); |
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67 assert(!oopDesc::is_null(heap_oop), "expected non-null oop"); |
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68 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
342
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69 // If p points to a younger generation, mark the card. |
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70 if ((HeapWord*)obj < gen_boundary()) { |
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71 rs()->write_ref_field_gc_par(p, obj); |
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72 } |
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73 } |
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74 |
0 | 75 // NOTE! Any changes made here should also be made |
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76 // in FastScanClosure::do_oop_work() |
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77 template <class T> inline void ScanClosure::do_oop_work(T* p) { |
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78 T heap_oop = oopDesc::load_heap_oop(p); |
0 | 79 // Should we copy the obj? |
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80 if (!oopDesc::is_null(heap_oop)) { |
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81 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
0 | 82 if ((HeapWord*)obj < _boundary) { |
83 assert(!_g->to()->is_in_reserved(obj), "Scanning field twice?"); | |
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84 oop new_obj = obj->is_forwarded() ? obj->forwardee() |
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85 : _g->copy_to_survivor_space(obj); |
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86 oopDesc::encode_store_heap_oop_not_null(p, new_obj); |
0 | 87 } |
88 if (_gc_barrier) { | |
89 // Now call parent closure | |
90 do_barrier(p); | |
91 } | |
92 } | |
93 } | |
94 | |
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95 inline void ScanClosure::do_oop_nv(oop* p) { ScanClosure::do_oop_work(p); } |
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96 inline void ScanClosure::do_oop_nv(narrowOop* p) { ScanClosure::do_oop_work(p); } |
0 | 97 |
98 // NOTE! Any changes made here should also be made | |
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99 // in ScanClosure::do_oop_work() |
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100 template <class T> inline void FastScanClosure::do_oop_work(T* p) { |
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101 T heap_oop = oopDesc::load_heap_oop(p); |
0 | 102 // Should we copy the obj? |
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103 if (!oopDesc::is_null(heap_oop)) { |
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104 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
0 | 105 if ((HeapWord*)obj < _boundary) { |
106 assert(!_g->to()->is_in_reserved(obj), "Scanning field twice?"); | |
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107 oop new_obj = obj->is_forwarded() ? obj->forwardee() |
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108 : _g->copy_to_survivor_space(obj); |
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109 oopDesc::encode_store_heap_oop_not_null(p, new_obj); |
0 | 110 if (_gc_barrier) { |
111 // Now call parent closure | |
112 do_barrier(p); | |
113 } | |
114 } | |
115 } | |
116 } | |
117 | |
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118 inline void FastScanClosure::do_oop_nv(oop* p) { FastScanClosure::do_oop_work(p); } |
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119 inline void FastScanClosure::do_oop_nv(narrowOop* p) { FastScanClosure::do_oop_work(p); } |
0 | 120 |
121 // Note similarity to ScanClosure; the difference is that | |
122 // the barrier set is taken care of outside this closure. | |
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123 template <class T> inline void ScanWeakRefClosure::do_oop_work(T* p) { |
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124 assert(!oopDesc::is_null(*p), "null weak reference?"); |
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125 oop obj = oopDesc::load_decode_heap_oop_not_null(p); |
0 | 126 // weak references are sometimes scanned twice; must check |
127 // that to-space doesn't already contain this object | |
128 if ((HeapWord*)obj < _boundary && !_g->to()->is_in_reserved(obj)) { | |
113
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129 oop new_obj = obj->is_forwarded() ? obj->forwardee() |
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130 : _g->copy_to_survivor_space(obj); |
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131 oopDesc::encode_store_heap_oop_not_null(p, new_obj); |
0 | 132 } |
133 } | |
134 | |
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135 inline void ScanWeakRefClosure::do_oop_nv(oop* p) { ScanWeakRefClosure::do_oop_work(p); } |
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136 inline void ScanWeakRefClosure::do_oop_nv(narrowOop* p) { ScanWeakRefClosure::do_oop_work(p); } |
1972 | 137 |
138 #endif // SHARE_VM_MEMORY_GENOOPCLOSURES_INLINE_HPP |