Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.inline.hpp @ 12343:d55c004e1d4d
8025305: Cleanup CardTableModRefBS usage in G1
Summary: Move some G1 specific code from CardTableModRefBS to G1SATBCardTableModRefBS.
Reviewed-by: brutisso, tschatzl, ehelin
author | mgerdin |
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date | Tue, 24 Sep 2013 14:46:29 +0200 |
parents | 2e093b564241 |
children | cefad50507d8 69944b868a32 |
rev | line source |
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342 | 1 /* |
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2 * Copyright (c) 2001, 2012, 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 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTEDHEAP_INLINE_HPP |
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTEDHEAP_INLINE_HPP | |
27 | |
28 #include "gc_implementation/g1/concurrentMark.hpp" | |
29 #include "gc_implementation/g1/g1CollectedHeap.hpp" | |
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30 #include "gc_implementation/g1/g1AllocRegion.inline.hpp" |
1973 | 31 #include "gc_implementation/g1/g1CollectorPolicy.hpp" |
2149 | 32 #include "gc_implementation/g1/heapRegionSeq.inline.hpp" |
1972 | 33 #include "utilities/taskqueue.hpp" |
34 | |
342 | 35 // Inline functions for G1CollectedHeap |
36 | |
3766 | 37 template <class T> |
342 | 38 inline HeapRegion* |
3766 | 39 G1CollectedHeap::heap_region_containing(const T addr) const { |
40 HeapRegion* hr = _hrs.addr_to_region((HeapWord*) addr); | |
342 | 41 // hr can be null if addr in perm_gen |
42 if (hr != NULL && hr->continuesHumongous()) { | |
43 hr = hr->humongous_start_region(); | |
44 } | |
45 return hr; | |
46 } | |
47 | |
3766 | 48 template <class T> |
342 | 49 inline HeapRegion* |
3766 | 50 G1CollectedHeap::heap_region_containing_raw(const T addr) const { |
51 assert(_g1_reserved.contains((const void*) addr), "invariant"); | |
52 HeapRegion* res = _hrs.addr_to_region_unsafe((HeapWord*) addr); | |
342 | 53 return res; |
54 } | |
55 | |
56 inline bool G1CollectedHeap::obj_in_cs(oop obj) { | |
3766 | 57 HeapRegion* r = _hrs.addr_to_region((HeapWord*) obj); |
342 | 58 return r != NULL && r->in_collection_set(); |
59 } | |
60 | |
1973 | 61 inline HeapWord* |
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62 G1CollectedHeap::attempt_allocation(size_t word_size, |
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63 unsigned int* gc_count_before_ret, |
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64 int* gclocker_retry_count_ret) { |
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65 assert_heap_not_locked_and_not_at_safepoint(); |
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66 assert(!isHumongous(word_size), "attempt_allocation() should not " |
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67 "be called for humongous allocation requests"); |
1973 | 68 |
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69 HeapWord* result = _mutator_alloc_region.attempt_allocation(word_size, |
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70 false /* bot_updates */); |
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71 if (result == NULL) { |
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72 result = attempt_allocation_slow(word_size, |
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73 gc_count_before_ret, |
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74 gclocker_retry_count_ret); |
342 | 75 } |
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76 assert_heap_not_locked(); |
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77 if (result != NULL) { |
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78 dirty_young_block(result, word_size); |
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79 } |
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80 return result; |
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81 } |
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82 |
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83 inline HeapWord* G1CollectedHeap::survivor_attempt_allocation(size_t |
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84 word_size) { |
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85 assert(!isHumongous(word_size), |
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86 "we should not be seeing humongous-size allocations in this path"); |
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87 |
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88 HeapWord* result = _survivor_gc_alloc_region.attempt_allocation(word_size, |
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89 false /* bot_updates */); |
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90 if (result == NULL) { |
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91 MutexLockerEx x(FreeList_lock, Mutex::_no_safepoint_check_flag); |
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92 result = _survivor_gc_alloc_region.attempt_allocation_locked(word_size, |
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93 false /* bot_updates */); |
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94 } |
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95 if (result != NULL) { |
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96 dirty_young_block(result, word_size); |
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97 } |
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98 return result; |
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99 } |
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100 |
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101 inline HeapWord* G1CollectedHeap::old_attempt_allocation(size_t word_size) { |
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102 assert(!isHumongous(word_size), |
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103 "we should not be seeing humongous-size allocations in this path"); |
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104 |
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105 HeapWord* result = _old_gc_alloc_region.attempt_allocation(word_size, |
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106 true /* bot_updates */); |
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107 if (result == NULL) { |
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108 MutexLockerEx x(FreeList_lock, Mutex::_no_safepoint_check_flag); |
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109 result = _old_gc_alloc_region.attempt_allocation_locked(word_size, |
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110 true /* bot_updates */); |
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111 } |
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112 return result; |
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113 } |
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114 |
1973 | 115 // It dirties the cards that cover the block so that so that the post |
116 // write barrier never queues anything when updating objects on this | |
117 // block. It is assumed (and in fact we assert) that the block | |
118 // belongs to a young region. | |
119 inline void | |
120 G1CollectedHeap::dirty_young_block(HeapWord* start, size_t word_size) { | |
121 assert_heap_not_locked(); | |
122 | |
123 // Assign the containing region to containing_hr so that we don't | |
124 // have to keep calling heap_region_containing_raw() in the | |
125 // asserts below. | |
126 DEBUG_ONLY(HeapRegion* containing_hr = heap_region_containing_raw(start);) | |
127 assert(containing_hr != NULL && start != NULL && word_size > 0, | |
128 "pre-condition"); | |
129 assert(containing_hr->is_in(start), "it should contain start"); | |
130 assert(containing_hr->is_young(), "it should be young"); | |
131 assert(!containing_hr->isHumongous(), "it should not be humongous"); | |
132 | |
133 HeapWord* end = start + word_size; | |
134 assert(containing_hr->is_in(end - 1), "it should also contain end - 1"); | |
135 | |
136 MemRegion mr(start, end); | |
12343 | 137 g1_barrier_set()->dirty(mr); |
342 | 138 } |
139 | |
1709 | 140 inline RefToScanQueue* G1CollectedHeap::task_queue(int i) const { |
342 | 141 return _task_queues->queue(i); |
142 } | |
143 | |
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144 inline bool G1CollectedHeap::isMarkedPrev(oop obj) const { |
342 | 145 return _cm->prevMarkBitMap()->isMarked((HeapWord *)obj); |
146 } | |
147 | |
148 inline bool G1CollectedHeap::isMarkedNext(oop obj) const { | |
149 return _cm->nextMarkBitMap()->isMarked((HeapWord *)obj); | |
150 } | |
1972 | 151 |
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152 #ifndef PRODUCT |
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153 // Support for G1EvacuationFailureALot |
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154 |
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155 inline bool |
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156 G1CollectedHeap::evacuation_failure_alot_for_gc_type(bool gcs_are_young, |
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157 bool during_initial_mark, |
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158 bool during_marking) { |
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159 bool res = false; |
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160 if (during_marking) { |
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161 res |= G1EvacuationFailureALotDuringConcMark; |
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162 } |
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163 if (during_initial_mark) { |
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164 res |= G1EvacuationFailureALotDuringInitialMark; |
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165 } |
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166 if (gcs_are_young) { |
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167 res |= G1EvacuationFailureALotDuringYoungGC; |
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168 } else { |
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169 // GCs are mixed |
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170 res |= G1EvacuationFailureALotDuringMixedGC; |
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171 } |
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172 return res; |
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173 } |
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174 |
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175 inline void |
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176 G1CollectedHeap::set_evacuation_failure_alot_for_current_gc() { |
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177 if (G1EvacuationFailureALot) { |
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178 // Note we can't assert that _evacuation_failure_alot_for_current_gc |
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179 // is clear here. It may have been set during a previous GC but that GC |
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180 // did not copy enough objects (i.e. G1EvacuationFailureALotCount) to |
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181 // trigger an evacuation failure and clear the flags and and counts. |
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182 |
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183 // Check if we have gone over the interval. |
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184 const size_t gc_num = total_collections(); |
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185 const size_t elapsed_gcs = gc_num - _evacuation_failure_alot_gc_number; |
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186 |
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187 _evacuation_failure_alot_for_current_gc = (elapsed_gcs >= G1EvacuationFailureALotInterval); |
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188 |
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189 // Now check if G1EvacuationFailureALot is enabled for the current GC type. |
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190 const bool gcs_are_young = g1_policy()->gcs_are_young(); |
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191 const bool during_im = g1_policy()->during_initial_mark_pause(); |
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192 const bool during_marking = mark_in_progress(); |
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193 |
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194 _evacuation_failure_alot_for_current_gc &= |
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195 evacuation_failure_alot_for_gc_type(gcs_are_young, |
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196 during_im, |
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197 during_marking); |
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198 } |
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199 } |
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200 |
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201 inline bool |
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202 G1CollectedHeap::evacuation_should_fail() { |
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203 if (!G1EvacuationFailureALot || !_evacuation_failure_alot_for_current_gc) { |
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204 return false; |
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205 } |
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206 // G1EvacuationFailureALot is in effect for current GC |
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207 // Access to _evacuation_failure_alot_count is not atomic; |
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208 // the value does not have to be exact. |
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209 if (++_evacuation_failure_alot_count < G1EvacuationFailureALotCount) { |
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210 return false; |
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211 } |
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212 _evacuation_failure_alot_count = 0; |
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213 return true; |
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214 } |
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215 |
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216 inline void G1CollectedHeap::reset_evacuation_should_fail() { |
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217 if (G1EvacuationFailureALot) { |
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218 _evacuation_failure_alot_gc_number = total_collections(); |
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219 _evacuation_failure_alot_count = 0; |
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220 _evacuation_failure_alot_for_current_gc = false; |
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221 } |
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222 } |
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223 #endif // #ifndef PRODUCT |
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224 |
1972 | 225 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTEDHEAP_INLINE_HPP |