Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.inline.hpp @ 17755:96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
Summary: Improve fast card cache iteration and avoid taking locks when freeing the collection set.
Reviewed-by: brutisso
author | tschatzl |
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date | Mon, 24 Mar 2014 15:30:36 +0100 |
parents | 58fc1b1523dc |
children | bfdf528be8e8 |
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 #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" |
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33 #include "gc_implementation/g1/heapRegionSet.inline.hpp" |
2149 | 34 #include "gc_implementation/g1/heapRegionSeq.inline.hpp" |
1972 | 35 #include "utilities/taskqueue.hpp" |
36 | |
342 | 37 // Inline functions for G1CollectedHeap |
38 | |
3766 | 39 template <class T> |
342 | 40 inline HeapRegion* |
3766 | 41 G1CollectedHeap::heap_region_containing(const T addr) const { |
42 HeapRegion* hr = _hrs.addr_to_region((HeapWord*) addr); | |
342 | 43 // hr can be null if addr in perm_gen |
44 if (hr != NULL && hr->continuesHumongous()) { | |
45 hr = hr->humongous_start_region(); | |
46 } | |
47 return hr; | |
48 } | |
49 | |
3766 | 50 template <class T> |
342 | 51 inline HeapRegion* |
3766 | 52 G1CollectedHeap::heap_region_containing_raw(const T addr) const { |
53 assert(_g1_reserved.contains((const void*) addr), "invariant"); | |
54 HeapRegion* res = _hrs.addr_to_region_unsafe((HeapWord*) addr); | |
342 | 55 return res; |
56 } | |
57 | |
58 inline bool G1CollectedHeap::obj_in_cs(oop obj) { | |
3766 | 59 HeapRegion* r = _hrs.addr_to_region((HeapWord*) obj); |
342 | 60 return r != NULL && r->in_collection_set(); |
61 } | |
62 | |
1973 | 63 inline HeapWord* |
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64 G1CollectedHeap::attempt_allocation(size_t word_size, |
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65 unsigned int* gc_count_before_ret, |
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66 int* gclocker_retry_count_ret) { |
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67 assert_heap_not_locked_and_not_at_safepoint(); |
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68 assert(!isHumongous(word_size), "attempt_allocation() should not " |
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69 "be called for humongous allocation requests"); |
1973 | 70 |
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71 HeapWord* result = _mutator_alloc_region.attempt_allocation(word_size, |
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72 false /* bot_updates */); |
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73 if (result == NULL) { |
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74 result = attempt_allocation_slow(word_size, |
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75 gc_count_before_ret, |
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76 gclocker_retry_count_ret); |
342 | 77 } |
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78 assert_heap_not_locked(); |
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79 if (result != NULL) { |
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80 dirty_young_block(result, word_size); |
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81 } |
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82 return result; |
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83 } |
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84 |
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85 inline HeapWord* G1CollectedHeap::survivor_attempt_allocation(size_t |
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86 word_size) { |
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87 assert(!isHumongous(word_size), |
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88 "we should not be seeing humongous-size allocations in this path"); |
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89 |
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90 HeapWord* result = _survivor_gc_alloc_region.attempt_allocation(word_size, |
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91 false /* bot_updates */); |
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92 if (result == NULL) { |
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93 MutexLockerEx x(FreeList_lock, Mutex::_no_safepoint_check_flag); |
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94 result = _survivor_gc_alloc_region.attempt_allocation_locked(word_size, |
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95 false /* bot_updates */); |
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96 } |
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97 if (result != NULL) { |
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98 dirty_young_block(result, word_size); |
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99 } |
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100 return result; |
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101 } |
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102 |
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103 inline HeapWord* G1CollectedHeap::old_attempt_allocation(size_t word_size) { |
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104 assert(!isHumongous(word_size), |
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105 "we should not be seeing humongous-size allocations in this path"); |
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106 |
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107 HeapWord* result = _old_gc_alloc_region.attempt_allocation(word_size, |
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108 true /* bot_updates */); |
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109 if (result == NULL) { |
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110 MutexLockerEx x(FreeList_lock, Mutex::_no_safepoint_check_flag); |
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111 result = _old_gc_alloc_region.attempt_allocation_locked(word_size, |
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112 true /* bot_updates */); |
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113 } |
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114 return result; |
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115 } |
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116 |
1973 | 117 // It dirties the cards that cover the block so that so that the post |
118 // write barrier never queues anything when updating objects on this | |
119 // block. It is assumed (and in fact we assert) that the block | |
120 // belongs to a young region. | |
121 inline void | |
122 G1CollectedHeap::dirty_young_block(HeapWord* start, size_t word_size) { | |
123 assert_heap_not_locked(); | |
124 | |
125 // Assign the containing region to containing_hr so that we don't | |
126 // have to keep calling heap_region_containing_raw() in the | |
127 // asserts below. | |
128 DEBUG_ONLY(HeapRegion* containing_hr = heap_region_containing_raw(start);) | |
129 assert(containing_hr != NULL && start != NULL && word_size > 0, | |
130 "pre-condition"); | |
131 assert(containing_hr->is_in(start), "it should contain start"); | |
132 assert(containing_hr->is_young(), "it should be young"); | |
133 assert(!containing_hr->isHumongous(), "it should not be humongous"); | |
134 | |
135 HeapWord* end = start + word_size; | |
136 assert(containing_hr->is_in(end - 1), "it should also contain end - 1"); | |
137 | |
138 MemRegion mr(start, end); | |
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139 g1_barrier_set()->g1_mark_as_young(mr); |
342 | 140 } |
141 | |
1709 | 142 inline RefToScanQueue* G1CollectedHeap::task_queue(int i) const { |
342 | 143 return _task_queues->queue(i); |
144 } | |
145 | |
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146 inline bool G1CollectedHeap::isMarkedPrev(oop obj) const { |
342 | 147 return _cm->prevMarkBitMap()->isMarked((HeapWord *)obj); |
148 } | |
149 | |
150 inline bool G1CollectedHeap::isMarkedNext(oop obj) const { | |
151 return _cm->nextMarkBitMap()->isMarked((HeapWord *)obj); | |
152 } | |
1972 | 153 |
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154 #ifndef PRODUCT |
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155 // Support for G1EvacuationFailureALot |
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156 |
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157 inline bool |
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158 G1CollectedHeap::evacuation_failure_alot_for_gc_type(bool gcs_are_young, |
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159 bool during_initial_mark, |
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160 bool during_marking) { |
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161 bool res = false; |
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162 if (during_marking) { |
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163 res |= G1EvacuationFailureALotDuringConcMark; |
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164 } |
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165 if (during_initial_mark) { |
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166 res |= G1EvacuationFailureALotDuringInitialMark; |
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167 } |
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168 if (gcs_are_young) { |
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169 res |= G1EvacuationFailureALotDuringYoungGC; |
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170 } else { |
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171 // GCs are mixed |
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172 res |= G1EvacuationFailureALotDuringMixedGC; |
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173 } |
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174 return res; |
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175 } |
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176 |
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177 inline void |
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178 G1CollectedHeap::set_evacuation_failure_alot_for_current_gc() { |
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179 if (G1EvacuationFailureALot) { |
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180 // Note we can't assert that _evacuation_failure_alot_for_current_gc |
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181 // is clear here. It may have been set during a previous GC but that GC |
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182 // did not copy enough objects (i.e. G1EvacuationFailureALotCount) to |
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183 // trigger an evacuation failure and clear the flags and and counts. |
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184 |
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185 // Check if we have gone over the interval. |
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186 const size_t gc_num = total_collections(); |
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187 const size_t elapsed_gcs = gc_num - _evacuation_failure_alot_gc_number; |
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188 |
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189 _evacuation_failure_alot_for_current_gc = (elapsed_gcs >= G1EvacuationFailureALotInterval); |
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190 |
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191 // Now check if G1EvacuationFailureALot is enabled for the current GC type. |
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192 const bool gcs_are_young = g1_policy()->gcs_are_young(); |
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193 const bool during_im = g1_policy()->during_initial_mark_pause(); |
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194 const bool during_marking = mark_in_progress(); |
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195 |
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196 _evacuation_failure_alot_for_current_gc &= |
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197 evacuation_failure_alot_for_gc_type(gcs_are_young, |
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198 during_im, |
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199 during_marking); |
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200 } |
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201 } |
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202 |
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203 inline bool |
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204 G1CollectedHeap::evacuation_should_fail() { |
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205 if (!G1EvacuationFailureALot || !_evacuation_failure_alot_for_current_gc) { |
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206 return false; |
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207 } |
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208 // G1EvacuationFailureALot is in effect for current GC |
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209 // Access to _evacuation_failure_alot_count is not atomic; |
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210 // the value does not have to be exact. |
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211 if (++_evacuation_failure_alot_count < G1EvacuationFailureALotCount) { |
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212 return false; |
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213 } |
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214 _evacuation_failure_alot_count = 0; |
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215 return true; |
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216 } |
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217 |
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218 inline void G1CollectedHeap::reset_evacuation_should_fail() { |
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219 if (G1EvacuationFailureALot) { |
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220 _evacuation_failure_alot_gc_number = total_collections(); |
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221 _evacuation_failure_alot_count = 0; |
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222 _evacuation_failure_alot_for_current_gc = false; |
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223 } |
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224 } |
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225 #endif // #ifndef PRODUCT |
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226 |
1972 | 227 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTEDHEAP_INLINE_HPP |