Mercurial > hg > graal-jvmci-8
annotate src/share/vm/gc_implementation/g1/g1OopClosures.inline.hpp @ 20296:a3953c777565
8027959: Early reclamation of large objects in G1
Summary: Try to reclaim humongous objects at every young collection after doing a conservative estimate of its liveness.
Reviewed-by: brutisso, mgerdin
author | tschatzl |
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date | Wed, 23 Jul 2014 09:03:32 +0200 |
parents | 2c6ef90f030a |
children | eec72fa4b108 |
rev | line source |
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342 | 1 /* |
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2 * Copyright (c) 2001, 2014, 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_G1OOPCLOSURES_INLINE_HPP |
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_INLINE_HPP | |
27 | |
3771 | 28 #include "gc_implementation/g1/concurrentMark.inline.hpp" |
1972 | 29 #include "gc_implementation/g1/g1CollectedHeap.hpp" |
30 #include "gc_implementation/g1/g1OopClosures.hpp" | |
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31 #include "gc_implementation/g1/g1ParScanThreadState.inline.hpp" |
1972 | 32 #include "gc_implementation/g1/g1RemSet.hpp" |
14391 | 33 #include "gc_implementation/g1/g1RemSet.inline.hpp" |
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34 #include "gc_implementation/g1/heapRegionRemSet.hpp" |
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35 #include "memory/iterator.inline.hpp" |
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36 #include "runtime/prefetch.inline.hpp" |
1972 | 37 |
342 | 38 /* |
39 * This really ought to be an inline function, but apparently the C++ | |
40 * compiler sometimes sees fit to ignore inline declarations. Sigh. | |
41 */ | |
42 | |
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43 template <class T> |
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44 inline void FilterIntoCSClosure::do_oop_nv(T* p) { |
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45 T heap_oop = oopDesc::load_heap_oop(p); |
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46 if (!oopDesc::is_null(heap_oop) && |
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47 _g1->is_in_cset_or_humongous(oopDesc::decode_heap_oop_not_null(heap_oop))) { |
342 | 48 _oc->do_oop(p); |
49 } | |
50 } | |
51 | |
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52 template <class T> |
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53 inline void FilterOutOfRegionClosure::do_oop_nv(T* p) { |
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54 T heap_oop = oopDesc::load_heap_oop(p); |
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55 if (!oopDesc::is_null(heap_oop)) { |
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56 HeapWord* obj_hw = (HeapWord*)oopDesc::decode_heap_oop_not_null(heap_oop); |
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57 if (obj_hw < _r_bottom || obj_hw >= _r_end) { |
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58 _oc->do_oop(p); |
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59 } |
342 | 60 } |
61 } | |
62 | |
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63 // This closure is applied to the fields of the objects that have just been copied. |
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64 template <class T> |
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65 inline void G1ParScanClosure::do_oop_nv(T* p) { |
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66 T heap_oop = oopDesc::load_heap_oop(p); |
342 | 67 |
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68 if (!oopDesc::is_null(heap_oop)) { |
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69 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
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70 G1CollectedHeap::in_cset_state_t state = _g1->in_cset_state(obj); |
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71 if (state == G1CollectedHeap::InCSet) { |
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72 // We're not going to even bother checking whether the object is |
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73 // already forwarded or not, as this usually causes an immediate |
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74 // stall. We'll try to prefetch the object (for write, given that |
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75 // we might need to install the forwarding reference) and we'll |
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76 // get back to it when pop it from the queue |
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77 Prefetch::write(obj->mark_addr(), 0); |
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78 Prefetch::read(obj->mark_addr(), (HeapWordSize*2)); |
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79 |
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80 // slightly paranoid test; I'm trying to catch potential |
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81 // problems before we go into push_on_queue to know where the |
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82 // problem is coming from |
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83 assert((obj == oopDesc::load_decode_heap_oop(p)) || |
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84 (obj->is_forwarded() && |
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85 obj->forwardee() == oopDesc::load_decode_heap_oop(p)), |
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86 "p should still be pointing to obj or to its forwardee"); |
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87 |
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88 _par_scan_state->push_on_queue(p); |
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89 } else { |
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90 if (state == G1CollectedHeap::IsHumongous) { |
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91 _g1->set_humongous_is_live(obj); |
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92 } |
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93 _par_scan_state->update_rs(_from, p, _worker_id); |
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94 } |
342 | 95 } |
96 } | |
1261 | 97 |
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98 template <class T> |
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99 inline void G1ParPushHeapRSClosure::do_oop_nv(T* p) { |
1261 | 100 T heap_oop = oopDesc::load_heap_oop(p); |
101 | |
102 if (!oopDesc::is_null(heap_oop)) { | |
103 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
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104 if (_g1->is_in_cset_or_humongous(obj)) { |
1261 | 105 Prefetch::write(obj->mark_addr(), 0); |
106 Prefetch::read(obj->mark_addr(), (HeapWordSize*2)); | |
1705 | 107 |
108 // Place on the references queue | |
1261 | 109 _par_scan_state->push_on_queue(p); |
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110 } else { |
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111 assert(!_g1->obj_in_cs(obj), "checking"); |
1261 | 112 } |
113 } | |
114 } | |
1705 | 115 |
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116 template <class T> |
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117 inline void G1CMOopClosure::do_oop_nv(T* p) { |
3771 | 118 oop obj = oopDesc::load_decode_heap_oop(p); |
119 if (_cm->verbose_high()) { | |
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120 gclog_or_tty->print_cr("[%u] we're looking at location " |
3771 | 121 "*"PTR_FORMAT" = "PTR_FORMAT, |
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122 _task->worker_id(), p2i(p), p2i((void*) obj)); |
3771 | 123 } |
124 _task->deal_with_reference(obj); | |
125 } | |
1972 | 126 |
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127 template <class T> |
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128 inline void G1RootRegionScanClosure::do_oop_nv(T* p) { |
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129 T heap_oop = oopDesc::load_heap_oop(p); |
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130 if (!oopDesc::is_null(heap_oop)) { |
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131 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
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132 HeapRegion* hr = _g1h->heap_region_containing((HeapWord*) obj); |
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133 if (hr != NULL) { |
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134 _cm->grayRoot(obj, obj->size(), _worker_id, hr); |
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135 } |
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136 } |
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137 } |
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138 |
4839 | 139 template <class T> |
140 inline void G1Mux2Closure::do_oop_nv(T* p) { | |
141 // Apply first closure; then apply the second. | |
142 _c1->do_oop(p); | |
143 _c2->do_oop(p); | |
144 } | |
145 | |
146 template <class T> | |
147 inline void G1TriggerClosure::do_oop_nv(T* p) { | |
148 // Record that this closure was actually applied (triggered). | |
149 _triggered = true; | |
150 } | |
151 | |
152 template <class T> | |
153 inline void G1InvokeIfNotTriggeredClosure::do_oop_nv(T* p) { | |
154 if (!_trigger_cl->triggered()) { | |
155 _oop_cl->do_oop(p); | |
156 } | |
157 } | |
158 | |
159 template <class T> | |
160 inline void G1UpdateRSOrPushRefOopClosure::do_oop_nv(T* p) { | |
161 oop obj = oopDesc::load_decode_heap_oop(p); | |
162 #ifdef ASSERT | |
163 // can't do because of races | |
164 // assert(obj == NULL || obj->is_oop(), "expected an oop"); | |
165 | |
166 // Do the safe subset of is_oop | |
167 if (obj != NULL) { | |
168 #ifdef CHECK_UNHANDLED_OOPS | |
169 oopDesc* o = obj.obj(); | |
170 #else | |
171 oopDesc* o = obj; | |
172 #endif // CHECK_UNHANDLED_OOPS | |
173 assert((intptr_t)o % MinObjAlignmentInBytes == 0, "not oop aligned"); | |
174 assert(Universe::heap()->is_in_reserved(obj), "must be in heap"); | |
175 } | |
176 #endif // ASSERT | |
177 | |
178 assert(_from != NULL, "from region must be non-NULL"); | |
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179 assert(_from->is_in_reserved(p), "p is not in from"); |
4839 | 180 |
181 HeapRegion* to = _g1->heap_region_containing(obj); | |
182 if (to != NULL && _from != to) { | |
183 // The _record_refs_into_cset flag is true during the RSet | |
184 // updating part of an evacuation pause. It is false at all | |
185 // other times: | |
186 // * rebuilding the rembered sets after a full GC | |
187 // * during concurrent refinement. | |
188 // * updating the remembered sets of regions in the collection | |
189 // set in the event of an evacuation failure (when deferred | |
190 // updates are enabled). | |
191 | |
192 if (_record_refs_into_cset && to->in_collection_set()) { | |
193 // We are recording references that point into the collection | |
194 // set and this particular reference does exactly that... | |
195 // If the referenced object has already been forwarded | |
196 // to itself, we are handling an evacuation failure and | |
197 // we have already visited/tried to copy this object | |
198 // there is no need to retry. | |
199 if (!self_forwarded(obj)) { | |
200 assert(_push_ref_cl != NULL, "should not be null"); | |
201 // Push the reference in the refs queue of the G1ParScanThreadState | |
202 // instance for this worker thread. | |
203 _push_ref_cl->do_oop(p); | |
204 } | |
205 | |
206 // Deferred updates to the CSet are either discarded (in the normal case), | |
207 // or processed (if an evacuation failure occurs) at the end | |
208 // of the collection. | |
209 // See G1RemSet::cleanup_after_oops_into_collection_set_do(). | |
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210 return; |
4839 | 211 } |
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212 |
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213 // We either don't care about pushing references that point into the |
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214 // collection set (i.e. we're not during an evacuation pause) _or_ |
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215 // the reference doesn't point into the collection set. Either way |
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216 // we add the reference directly to the RSet of the region containing |
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217 // the referenced object. |
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218 assert(to->rem_set() != NULL, "Need per-region 'into' remsets."); |
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219 to->rem_set()->add_reference(p, _worker_i); |
4839 | 220 } |
221 } | |
222 | |
1972 | 223 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_INLINE_HPP |