Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/g1/g1SATBCardTableModRefBS.cpp @ 20292:5d7a63aee595
8049051: Use of during_initial_mark_pause() in G1CollectorPolicy::record_collection_pause_end() prevents use of seperate object copy time prediction during marking
Summary: Replaced use of during_initial_mark_pause() with the variable last_pause_included_initial_mark that holds the real old value of _during_initial_mark_pause.
Reviewed-by: brutisso, ehelin
author | tschatzl |
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date | Mon, 21 Jul 2014 09:59:37 +0200 |
parents | e5035defa3c4 |
children | 1f1d373cd044 |
rev | line source |
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342 | 1 /* |
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2 * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved. |
342 | 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 * | |
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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. |
342 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp" | |
27 #include "gc_implementation/g1/heapRegion.hpp" | |
28 #include "gc_implementation/g1/satbQueue.hpp" | |
29 #include "runtime/mutexLocker.hpp" | |
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30 #include "runtime/orderAccess.inline.hpp" |
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31 #include "runtime/thread.inline.hpp" |
342 | 32 |
33 G1SATBCardTableModRefBS::G1SATBCardTableModRefBS(MemRegion whole_heap, | |
34 int max_covered_regions) : | |
35 CardTableModRefBSForCTRS(whole_heap, max_covered_regions) | |
36 { | |
37 _kind = G1SATBCT; | |
38 } | |
39 | |
40 | |
41 void G1SATBCardTableModRefBS::enqueue(oop pre_val) { | |
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42 // Nulls should have been already filtered. |
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43 assert(pre_val->is_oop(true), "Error"); |
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44 |
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45 if (!JavaThread::satb_mark_queue_set().is_active()) return; |
342 | 46 Thread* thr = Thread::current(); |
47 if (thr->is_Java_thread()) { | |
48 JavaThread* jt = (JavaThread*)thr; | |
49 jt->satb_mark_queue().enqueue(pre_val); | |
50 } else { | |
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51 MutexLockerEx x(Shared_SATB_Q_lock, Mutex::_no_safepoint_check_flag); |
342 | 52 JavaThread::satb_mark_queue_set().shared_satb_queue()->enqueue(pre_val); |
53 } | |
54 } | |
55 | |
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56 template <class T> void |
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57 G1SATBCardTableModRefBS::write_ref_array_pre_work(T* dst, int count) { |
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58 if (!JavaThread::satb_mark_queue_set().is_active()) return; |
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59 T* elem_ptr = dst; |
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60 for (int i = 0; i < count; i++, elem_ptr++) { |
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61 T heap_oop = oopDesc::load_heap_oop(elem_ptr); |
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62 if (!oopDesc::is_null(heap_oop)) { |
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63 enqueue(oopDesc::decode_heap_oop_not_null(heap_oop)); |
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64 } |
342 | 65 } |
66 } | |
67 | |
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68 void G1SATBCardTableModRefBS::write_ref_array_pre(oop* dst, int count, bool dest_uninitialized) { |
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69 if (!dest_uninitialized) { |
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70 write_ref_array_pre_work(dst, count); |
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71 } |
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72 } |
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73 void G1SATBCardTableModRefBS::write_ref_array_pre(narrowOop* dst, int count, bool dest_uninitialized) { |
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74 if (!dest_uninitialized) { |
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75 write_ref_array_pre_work(dst, count); |
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76 } |
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77 } |
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78 |
12343 | 79 bool G1SATBCardTableModRefBS::mark_card_deferred(size_t card_index) { |
80 jbyte val = _byte_map[card_index]; | |
81 // It's already processed | |
82 if ((val & (clean_card_mask_val() | deferred_card_val())) == deferred_card_val()) { | |
83 return false; | |
84 } | |
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85 |
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86 if (val == g1_young_gen) { |
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87 // the card is for a young gen region. We don't need to keep track of all pointers into young |
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88 return false; |
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89 } |
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90 |
12343 | 91 // Cached bit can be installed either on a clean card or on a claimed card. |
92 jbyte new_val = val; | |
93 if (val == clean_card_val()) { | |
94 new_val = (jbyte)deferred_card_val(); | |
95 } else { | |
96 if (val & claimed_card_val()) { | |
97 new_val = val | (jbyte)deferred_card_val(); | |
98 } | |
99 } | |
100 if (new_val != val) { | |
101 Atomic::cmpxchg(new_val, &_byte_map[card_index], val); | |
102 } | |
103 return true; | |
104 } | |
105 | |
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106 void G1SATBCardTableModRefBS::g1_mark_as_young(const MemRegion& mr) { |
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107 jbyte *const first = byte_for(mr.start()); |
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108 jbyte *const last = byte_after(mr.last()); |
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109 |
17951 | 110 // Below we may use an explicit loop instead of memset() because on |
111 // certain platforms memset() can give concurrent readers phantom zeros. | |
112 if (UseMemSetInBOT) { | |
113 memset(first, g1_young_gen, last - first); | |
114 } else { | |
115 for (jbyte* i = first; i < last; i++) { | |
116 *i = g1_young_gen; | |
117 } | |
118 } | |
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119 } |
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120 |
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121 #ifndef PRODUCT |
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122 void G1SATBCardTableModRefBS::verify_g1_young_region(MemRegion mr) { |
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123 verify_region(mr, g1_young_gen, true); |
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124 } |
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125 #endif |
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126 |
342 | 127 G1SATBCardTableLoggingModRefBS:: |
128 G1SATBCardTableLoggingModRefBS(MemRegion whole_heap, | |
129 int max_covered_regions) : | |
130 G1SATBCardTableModRefBS(whole_heap, max_covered_regions), | |
131 _dcqs(JavaThread::dirty_card_queue_set()) | |
132 { | |
133 _kind = G1SATBCTLogging; | |
134 } | |
135 | |
136 void | |
137 G1SATBCardTableLoggingModRefBS::write_ref_field_work(void* field, | |
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138 oop new_val, |
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139 bool release) { |
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140 volatile jbyte* byte = byte_for(field); |
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141 if (*byte == g1_young_gen) { |
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142 return; |
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143 } |
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144 OrderAccess::storeload(); |
342 | 145 if (*byte != dirty_card) { |
146 *byte = dirty_card; | |
147 Thread* thr = Thread::current(); | |
148 if (thr->is_Java_thread()) { | |
149 JavaThread* jt = (JavaThread*)thr; | |
150 jt->dirty_card_queue().enqueue(byte); | |
151 } else { | |
152 MutexLockerEx x(Shared_DirtyCardQ_lock, | |
153 Mutex::_no_safepoint_check_flag); | |
154 _dcqs.shared_dirty_card_queue()->enqueue(byte); | |
155 } | |
156 } | |
157 } | |
158 | |
159 void | |
160 G1SATBCardTableLoggingModRefBS::write_ref_field_static(void* field, | |
161 oop new_val) { | |
162 uintptr_t field_uint = (uintptr_t)field; | |
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163 uintptr_t new_val_uint = cast_from_oop<uintptr_t>(new_val); |
342 | 164 uintptr_t comb = field_uint ^ new_val_uint; |
165 comb = comb >> HeapRegion::LogOfHRGrainBytes; | |
166 if (comb == 0) return; | |
167 if (new_val == NULL) return; | |
168 // Otherwise, log it. | |
169 G1SATBCardTableLoggingModRefBS* g1_bs = | |
170 (G1SATBCardTableLoggingModRefBS*)Universe::heap()->barrier_set(); | |
171 g1_bs->write_ref_field_work(field, new_val); | |
172 } | |
173 | |
174 void | |
175 G1SATBCardTableLoggingModRefBS::invalidate(MemRegion mr, bool whole_heap) { | |
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176 volatile jbyte* byte = byte_for(mr.start()); |
342 | 177 jbyte* last_byte = byte_for(mr.last()); |
178 Thread* thr = Thread::current(); | |
179 if (whole_heap) { | |
180 while (byte <= last_byte) { | |
181 *byte = dirty_card; | |
182 byte++; | |
183 } | |
184 } else { | |
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185 // skip all consecutive young cards |
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186 for (; byte <= last_byte && *byte == g1_young_gen; byte++); |
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187 |
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188 if (byte <= last_byte) { |
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189 OrderAccess::storeload(); |
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190 // Enqueue if necessary. |
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191 if (thr->is_Java_thread()) { |
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192 JavaThread* jt = (JavaThread*)thr; |
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193 for (; byte <= last_byte; byte++) { |
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194 if (*byte == g1_young_gen) { |
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195 continue; |
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196 } |
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197 if (*byte != dirty_card) { |
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198 *byte = dirty_card; |
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199 jt->dirty_card_queue().enqueue(byte); |
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200 } |
342 | 201 } |
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202 } else { |
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203 MutexLockerEx x(Shared_DirtyCardQ_lock, |
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204 Mutex::_no_safepoint_check_flag); |
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205 for (; byte <= last_byte; byte++) { |
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206 if (*byte == g1_young_gen) { |
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207 continue; |
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208 } |
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209 if (*byte != dirty_card) { |
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210 *byte = dirty_card; |
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211 _dcqs.shared_dirty_card_queue()->enqueue(byte); |
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212 } |
342 | 213 } |
214 } | |
215 } | |
216 } | |
217 } |