Mercurial > hg > graal-jvmci-8
annotate src/share/vm/gc_implementation/g1/satbQueue.cpp @ 1591:f16f1d7893de
6941378: G1: change default value of G1UseFixedWindowMMUTracker to true
Summary: Rather than changing the default value of the G1UseFixedWindowMMUTracker, the flag and associated guarantee have been removed.
Reviewed-by: jcoomes, tonyp, ysr
author | johnc |
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date | Mon, 24 May 2010 17:11:22 -0700 |
parents | d4197f8d516a |
children | c18cbe5936b8 |
rev | line source |
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342 | 1 /* |
2 * Copyright 2001-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 # include "incls/_precompiled.incl" | |
26 # include "incls/_satbQueue.cpp.incl" | |
27 | |
28 void ObjPtrQueue::apply_closure(ObjectClosure* cl) { | |
29 if (_buf != NULL) { | |
30 apply_closure_to_buffer(cl, _buf, _index, _sz); | |
31 _index = _sz; | |
32 } | |
33 } | |
34 | |
35 void ObjPtrQueue::apply_closure_to_buffer(ObjectClosure* cl, | |
36 void** buf, size_t index, size_t sz) { | |
37 if (cl == NULL) return; | |
38 for (size_t i = index; i < sz; i += oopSize) { | |
39 oop obj = (oop)buf[byte_index_to_index((int)i)]; | |
40 // There can be NULL entries because of destructors. | |
41 if (obj != NULL) { | |
42 cl->do_object(obj); | |
43 } | |
44 } | |
45 } | |
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46 |
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47 #ifdef ASSERT |
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48 void ObjPtrQueue::verify_oops_in_buffer() { |
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49 if (_buf == NULL) return; |
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50 for (size_t i = _index; i < _sz; i += oopSize) { |
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51 oop obj = (oop)_buf[byte_index_to_index((int)i)]; |
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52 assert(obj != NULL && obj->is_oop(true /* ignore mark word */), |
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53 "Not an oop"); |
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54 } |
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55 } |
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56 #endif |
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57 |
342 | 58 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away |
59 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
60 #endif // _MSC_VER | |
61 | |
62 | |
63 SATBMarkQueueSet::SATBMarkQueueSet() : | |
64 PtrQueueSet(), | |
65 _closure(NULL), _par_closures(NULL), | |
66 _shared_satb_queue(this, true /*perm*/) | |
67 {} | |
68 | |
69 void SATBMarkQueueSet::initialize(Monitor* cbl_mon, Mutex* fl_lock, | |
1111 | 70 int process_completed_threshold, |
342 | 71 Mutex* lock) { |
1111 | 72 PtrQueueSet::initialize(cbl_mon, fl_lock, process_completed_threshold, -1); |
342 | 73 _shared_satb_queue.set_lock(lock); |
74 if (ParallelGCThreads > 0) { | |
75 _par_closures = NEW_C_HEAP_ARRAY(ObjectClosure*, ParallelGCThreads); | |
76 } | |
77 } | |
78 | |
79 | |
80 void SATBMarkQueueSet::handle_zero_index_for_thread(JavaThread* t) { | |
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81 DEBUG_ONLY(t->satb_mark_queue().verify_oops_in_buffer();) |
342 | 82 t->satb_mark_queue().handle_zero_index(); |
83 } | |
84 | |
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85 #ifdef ASSERT |
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86 void SATBMarkQueueSet::dump_active_values(JavaThread* first, |
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87 bool expected_active) { |
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88 gclog_or_tty->print_cr("SATB queue active values for Java Threads"); |
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89 gclog_or_tty->print_cr(" SATB queue set: active is %s", |
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90 (is_active()) ? "TRUE" : "FALSE"); |
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91 gclog_or_tty->print_cr(" expected_active is %s", |
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92 (expected_active) ? "TRUE" : "FALSE"); |
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93 for (JavaThread* t = first; t; t = t->next()) { |
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94 bool active = t->satb_mark_queue().is_active(); |
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95 gclog_or_tty->print_cr(" thread %s, active is %s", |
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96 t->name(), (active) ? "TRUE" : "FALSE"); |
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97 } |
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98 } |
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99 #endif // ASSERT |
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100 |
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101 void SATBMarkQueueSet::set_active_all_threads(bool b, |
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102 bool expected_active) { |
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103 assert(SafepointSynchronize::is_at_safepoint(), "Must be at safepoint."); |
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104 JavaThread* first = Threads::first(); |
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105 |
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106 #ifdef ASSERT |
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107 if (_all_active != expected_active) { |
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108 dump_active_values(first, expected_active); |
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109 |
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110 // I leave this here as a guarantee, instead of an assert, so |
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111 // that it will still be compiled in if we choose to uncomment |
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112 // the #ifdef ASSERT in a product build. The whole block is |
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113 // within an #ifdef ASSERT so the guarantee will not be compiled |
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114 // in a product build anyway. |
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115 guarantee(false, |
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116 "SATB queue set has an unexpected active value"); |
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117 } |
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118 #endif // ASSERT |
342 | 119 _all_active = b; |
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120 |
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121 for (JavaThread* t = first; t; t = t->next()) { |
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122 #ifdef ASSERT |
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123 bool active = t->satb_mark_queue().is_active(); |
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124 if (active != expected_active) { |
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125 dump_active_values(first, expected_active); |
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126 |
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127 // I leave this here as a guarantee, instead of an assert, so |
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128 // that it will still be compiled in if we choose to uncomment |
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129 // the #ifdef ASSERT in a product build. The whole block is |
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130 // within an #ifdef ASSERT so the guarantee will not be compiled |
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131 // in a product build anyway. |
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132 guarantee(false, |
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133 "thread has an unexpected active value in its SATB queue"); |
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134 } |
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135 #endif // ASSERT |
342 | 136 t->satb_mark_queue().set_active(b); |
137 } | |
138 } | |
139 | |
140 void SATBMarkQueueSet::set_closure(ObjectClosure* closure) { | |
141 _closure = closure; | |
142 } | |
143 | |
144 void SATBMarkQueueSet::set_par_closure(int i, ObjectClosure* par_closure) { | |
145 assert(ParallelGCThreads > 0 && _par_closures != NULL, "Precondition"); | |
146 _par_closures[i] = par_closure; | |
147 } | |
148 | |
149 void SATBMarkQueueSet::iterate_closure_all_threads() { | |
150 for(JavaThread* t = Threads::first(); t; t = t->next()) { | |
151 t->satb_mark_queue().apply_closure(_closure); | |
152 } | |
153 shared_satb_queue()->apply_closure(_closure); | |
154 } | |
155 | |
156 void SATBMarkQueueSet::par_iterate_closure_all_threads(int worker) { | |
157 SharedHeap* sh = SharedHeap::heap(); | |
158 int parity = sh->strong_roots_parity(); | |
159 | |
160 for(JavaThread* t = Threads::first(); t; t = t->next()) { | |
161 if (t->claim_oops_do(true, parity)) { | |
162 t->satb_mark_queue().apply_closure(_par_closures[worker]); | |
163 } | |
164 } | |
165 // We'll have worker 0 do this one. | |
166 if (worker == 0) { | |
167 shared_satb_queue()->apply_closure(_par_closures[0]); | |
168 } | |
169 } | |
170 | |
171 bool SATBMarkQueueSet::apply_closure_to_completed_buffer_work(bool par, | |
172 int worker) { | |
1111 | 173 BufferNode* nd = NULL; |
342 | 174 { |
175 MutexLockerEx x(_cbl_mon, Mutex::_no_safepoint_check_flag); | |
176 if (_completed_buffers_head != NULL) { | |
177 nd = _completed_buffers_head; | |
1111 | 178 _completed_buffers_head = nd->next(); |
342 | 179 if (_completed_buffers_head == NULL) _completed_buffers_tail = NULL; |
180 _n_completed_buffers--; | |
181 if (_n_completed_buffers == 0) _process_completed = false; | |
182 } | |
183 } | |
184 ObjectClosure* cl = (par ? _par_closures[worker] : _closure); | |
185 if (nd != NULL) { | |
1111 | 186 void **buf = BufferNode::make_buffer_from_node(nd); |
187 ObjPtrQueue::apply_closure_to_buffer(cl, buf, 0, _sz); | |
188 deallocate_buffer(buf); | |
342 | 189 return true; |
190 } else { | |
191 return false; | |
192 } | |
193 } | |
194 | |
195 void SATBMarkQueueSet::abandon_partial_marking() { | |
1111 | 196 BufferNode* buffers_to_delete = NULL; |
342 | 197 { |
198 MutexLockerEx x(_cbl_mon, Mutex::_no_safepoint_check_flag); | |
199 while (_completed_buffers_head != NULL) { | |
1111 | 200 BufferNode* nd = _completed_buffers_head; |
201 _completed_buffers_head = nd->next(); | |
202 nd->set_next(buffers_to_delete); | |
342 | 203 buffers_to_delete = nd; |
204 } | |
205 _completed_buffers_tail = NULL; | |
206 _n_completed_buffers = 0; | |
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207 DEBUG_ONLY(assert_completed_buffer_list_len_correct_locked()); |
342 | 208 } |
209 while (buffers_to_delete != NULL) { | |
1111 | 210 BufferNode* nd = buffers_to_delete; |
211 buffers_to_delete = nd->next(); | |
212 deallocate_buffer(BufferNode::make_buffer_from_node(nd)); | |
342 | 213 } |
214 assert(SafepointSynchronize::is_at_safepoint(), "Must be at safepoint."); | |
215 // So we can safely manipulate these queues. | |
216 for (JavaThread* t = Threads::first(); t; t = t->next()) { | |
217 t->satb_mark_queue().reset(); | |
218 } | |
219 shared_satb_queue()->reset(); | |
220 } |