Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.inline.hpp @ 13037:c8fc12209830
8027616: Off by one error in putback for compressed oops nashorn performance improvement
Summary: Should compare bounds greater than or equal 4G when deciding if shift is needed or CDS area + compressed class space are within 4G of each other.
Reviewed-by: stefank, hseigel, zgu
author | coleenp |
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date | Thu, 31 Oct 2013 14:11:02 -0400 |
parents | 69944b868a32 |
children | 096c224171c4 de6a9e811145 |
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" |
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32 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp" |
2149 | 33 #include "gc_implementation/g1/heapRegionSeq.inline.hpp" |
1972 | 34 #include "utilities/taskqueue.hpp" |
35 | |
342 | 36 // Inline functions for G1CollectedHeap |
37 | |
3766 | 38 template <class T> |
342 | 39 inline HeapRegion* |
3766 | 40 G1CollectedHeap::heap_region_containing(const T addr) const { |
41 HeapRegion* hr = _hrs.addr_to_region((HeapWord*) addr); | |
342 | 42 // hr can be null if addr in perm_gen |
43 if (hr != NULL && hr->continuesHumongous()) { | |
44 hr = hr->humongous_start_region(); | |
45 } | |
46 return hr; | |
47 } | |
48 | |
3766 | 49 template <class T> |
342 | 50 inline HeapRegion* |
3766 | 51 G1CollectedHeap::heap_region_containing_raw(const T addr) const { |
52 assert(_g1_reserved.contains((const void*) addr), "invariant"); | |
53 HeapRegion* res = _hrs.addr_to_region_unsafe((HeapWord*) addr); | |
342 | 54 return res; |
55 } | |
56 | |
57 inline bool G1CollectedHeap::obj_in_cs(oop obj) { | |
3766 | 58 HeapRegion* r = _hrs.addr_to_region((HeapWord*) obj); |
342 | 59 return r != NULL && r->in_collection_set(); |
60 } | |
61 | |
1973 | 62 inline HeapWord* |
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63 G1CollectedHeap::attempt_allocation(size_t word_size, |
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64 unsigned int* gc_count_before_ret, |
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65 int* gclocker_retry_count_ret) { |
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66 assert_heap_not_locked_and_not_at_safepoint(); |
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67 assert(!isHumongous(word_size), "attempt_allocation() should not " |
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68 "be called for humongous allocation requests"); |
1973 | 69 |
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70 HeapWord* result = _mutator_alloc_region.attempt_allocation(word_size, |
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71 false /* bot_updates */); |
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72 if (result == NULL) { |
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73 result = attempt_allocation_slow(word_size, |
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74 gc_count_before_ret, |
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75 gclocker_retry_count_ret); |
342 | 76 } |
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77 assert_heap_not_locked(); |
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78 if (result != NULL) { |
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79 dirty_young_block(result, word_size); |
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80 } |
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81 return result; |
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82 } |
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83 |
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84 inline HeapWord* G1CollectedHeap::survivor_attempt_allocation(size_t |
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85 word_size) { |
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86 assert(!isHumongous(word_size), |
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87 "we should not be seeing humongous-size allocations in this path"); |
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88 |
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89 HeapWord* result = _survivor_gc_alloc_region.attempt_allocation(word_size, |
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90 false /* bot_updates */); |
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91 if (result == NULL) { |
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92 MutexLockerEx x(FreeList_lock, Mutex::_no_safepoint_check_flag); |
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93 result = _survivor_gc_alloc_region.attempt_allocation_locked(word_size, |
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94 false /* bot_updates */); |
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95 } |
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96 if (result != NULL) { |
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97 dirty_young_block(result, word_size); |
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98 } |
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99 return result; |
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100 } |
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101 |
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102 inline HeapWord* G1CollectedHeap::old_attempt_allocation(size_t word_size) { |
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103 assert(!isHumongous(word_size), |
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104 "we should not be seeing humongous-size allocations in this path"); |
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105 |
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106 HeapWord* result = _old_gc_alloc_region.attempt_allocation(word_size, |
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107 true /* bot_updates */); |
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108 if (result == NULL) { |
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109 MutexLockerEx x(FreeList_lock, Mutex::_no_safepoint_check_flag); |
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110 result = _old_gc_alloc_region.attempt_allocation_locked(word_size, |
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111 true /* bot_updates */); |
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112 } |
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113 return result; |
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114 } |
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115 |
1973 | 116 // It dirties the cards that cover the block so that so that the post |
117 // write barrier never queues anything when updating objects on this | |
118 // block. It is assumed (and in fact we assert) that the block | |
119 // belongs to a young region. | |
120 inline void | |
121 G1CollectedHeap::dirty_young_block(HeapWord* start, size_t word_size) { | |
122 assert_heap_not_locked(); | |
123 | |
124 // Assign the containing region to containing_hr so that we don't | |
125 // have to keep calling heap_region_containing_raw() in the | |
126 // asserts below. | |
127 DEBUG_ONLY(HeapRegion* containing_hr = heap_region_containing_raw(start);) | |
128 assert(containing_hr != NULL && start != NULL && word_size > 0, | |
129 "pre-condition"); | |
130 assert(containing_hr->is_in(start), "it should contain start"); | |
131 assert(containing_hr->is_young(), "it should be young"); | |
132 assert(!containing_hr->isHumongous(), "it should not be humongous"); | |
133 | |
134 HeapWord* end = start + word_size; | |
135 assert(containing_hr->is_in(end - 1), "it should also contain end - 1"); | |
136 | |
137 MemRegion mr(start, end); | |
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138 g1_barrier_set()->g1_mark_as_young(mr); |
342 | 139 } |
140 | |
1709 | 141 inline RefToScanQueue* G1CollectedHeap::task_queue(int i) const { |
342 | 142 return _task_queues->queue(i); |
143 } | |
144 | |
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145 inline bool G1CollectedHeap::isMarkedPrev(oop obj) const { |
342 | 146 return _cm->prevMarkBitMap()->isMarked((HeapWord *)obj); |
147 } | |
148 | |
149 inline bool G1CollectedHeap::isMarkedNext(oop obj) const { | |
150 return _cm->nextMarkBitMap()->isMarked((HeapWord *)obj); | |
151 } | |
1972 | 152 |
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153 #ifndef PRODUCT |
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154 // Support for G1EvacuationFailureALot |
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155 |
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156 inline bool |
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157 G1CollectedHeap::evacuation_failure_alot_for_gc_type(bool gcs_are_young, |
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158 bool during_initial_mark, |
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159 bool during_marking) { |
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160 bool res = false; |
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161 if (during_marking) { |
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162 res |= G1EvacuationFailureALotDuringConcMark; |
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163 } |
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164 if (during_initial_mark) { |
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165 res |= G1EvacuationFailureALotDuringInitialMark; |
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166 } |
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167 if (gcs_are_young) { |
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168 res |= G1EvacuationFailureALotDuringYoungGC; |
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169 } else { |
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170 // GCs are mixed |
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171 res |= G1EvacuationFailureALotDuringMixedGC; |
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172 } |
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173 return res; |
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174 } |
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175 |
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176 inline void |
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177 G1CollectedHeap::set_evacuation_failure_alot_for_current_gc() { |
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178 if (G1EvacuationFailureALot) { |
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179 // Note we can't assert that _evacuation_failure_alot_for_current_gc |
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180 // is clear here. It may have been set during a previous GC but that GC |
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181 // did not copy enough objects (i.e. G1EvacuationFailureALotCount) to |
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182 // trigger an evacuation failure and clear the flags and and counts. |
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183 |
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184 // Check if we have gone over the interval. |
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185 const size_t gc_num = total_collections(); |
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186 const size_t elapsed_gcs = gc_num - _evacuation_failure_alot_gc_number; |
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187 |
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188 _evacuation_failure_alot_for_current_gc = (elapsed_gcs >= G1EvacuationFailureALotInterval); |
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189 |
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190 // Now check if G1EvacuationFailureALot is enabled for the current GC type. |
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191 const bool gcs_are_young = g1_policy()->gcs_are_young(); |
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192 const bool during_im = g1_policy()->during_initial_mark_pause(); |
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193 const bool during_marking = mark_in_progress(); |
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194 |
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195 _evacuation_failure_alot_for_current_gc &= |
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196 evacuation_failure_alot_for_gc_type(gcs_are_young, |
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197 during_im, |
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198 during_marking); |
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199 } |
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200 } |
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201 |
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202 inline bool |
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203 G1CollectedHeap::evacuation_should_fail() { |
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204 if (!G1EvacuationFailureALot || !_evacuation_failure_alot_for_current_gc) { |
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205 return false; |
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206 } |
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207 // G1EvacuationFailureALot is in effect for current GC |
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208 // Access to _evacuation_failure_alot_count is not atomic; |
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209 // the value does not have to be exact. |
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210 if (++_evacuation_failure_alot_count < G1EvacuationFailureALotCount) { |
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211 return false; |
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212 } |
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213 _evacuation_failure_alot_count = 0; |
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214 return true; |
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215 } |
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216 |
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217 inline void G1CollectedHeap::reset_evacuation_should_fail() { |
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218 if (G1EvacuationFailureALot) { |
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219 _evacuation_failure_alot_gc_number = total_collections(); |
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220 _evacuation_failure_alot_count = 0; |
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221 _evacuation_failure_alot_for_current_gc = false; |
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222 } |
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223 } |
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224 #endif // #ifndef PRODUCT |
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225 |
1972 | 226 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTEDHEAP_INLINE_HPP |