Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/parallelScavenge/psCompactionManager.cpp @ 1552:c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair
| author | trims |
|---|---|
| date | Thu, 27 May 2010 19:08:38 -0700 |
| parents | c385bf94cfb8 |
| children | b2a00dd3117c |
| rev | line source |
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| 0 | 1 /* |
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2 * Copyright (c) 2005, 2009, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 #include "incls/_precompiled.incl" | |
| 26 #include "incls/_psCompactionManager.cpp.incl" | |
| 27 | |
| 28 PSOldGen* ParCompactionManager::_old_gen = NULL; | |
| 29 ParCompactionManager** ParCompactionManager::_manager_array = NULL; | |
| 30 OopTaskQueueSet* ParCompactionManager::_stack_array = NULL; | |
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31 ParCompactionManager::ObjArrayTaskQueueSet* |
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32 ParCompactionManager::_objarray_queues = NULL; |
| 0 | 33 ObjectStartArray* ParCompactionManager::_start_array = NULL; |
| 34 ParMarkBitMap* ParCompactionManager::_mark_bitmap = NULL; | |
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35 RegionTaskQueueSet* ParCompactionManager::_region_array = NULL; |
| 0 | 36 |
| 37 ParCompactionManager::ParCompactionManager() : | |
| 38 _action(CopyAndUpdate) { | |
| 39 | |
| 40 ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap(); | |
| 41 assert(heap->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity"); | |
| 42 | |
| 43 _old_gen = heap->old_gen(); | |
| 44 _start_array = old_gen()->start_array(); | |
| 45 | |
| 46 | |
| 47 marking_stack()->initialize(); | |
| 48 | |
| 49 // We want the overflow stack to be permanent | |
| 50 _overflow_stack = new (ResourceObj::C_HEAP) GrowableArray<oop>(10, true); | |
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51 |
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52 _objarray_queue.initialize(); |
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53 _objarray_overflow_stack = |
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54 new (ResourceObj::C_HEAP) ObjArrayOverflowStack(10, true); |
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55 |
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56 #ifdef USE_RegionTaskQueueWithOverflow |
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57 region_stack()->initialize(); |
| 0 | 58 #else |
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59 region_stack()->initialize(); |
| 0 | 60 |
| 61 // We want the overflow stack to be permanent | |
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62 _region_overflow_stack = |
| 0 | 63 new (ResourceObj::C_HEAP) GrowableArray<size_t>(10, true); |
| 64 #endif | |
| 65 | |
| 66 // Note that _revisit_klass_stack is allocated out of the | |
| 67 // C heap (as opposed to out of ResourceArena). | |
| 68 int size = | |
| 69 (SystemDictionary::number_of_classes() * 2) * 2 / ParallelGCThreads; | |
| 70 _revisit_klass_stack = new (ResourceObj::C_HEAP) GrowableArray<Klass*>(size, true); | |
| 941 | 71 // From some experiments (#klass/k)^2 for k = 10 seems a better fit, but this will |
| 72 // have to do for now until we are able to investigate a more optimal setting. | |
| 73 _revisit_mdo_stack = new (ResourceObj::C_HEAP) GrowableArray<DataLayout*>(size*2, true); | |
| 0 | 74 |
| 75 } | |
| 76 | |
| 77 ParCompactionManager::~ParCompactionManager() { | |
| 78 delete _overflow_stack; | |
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79 delete _objarray_overflow_stack; |
| 0 | 80 delete _revisit_klass_stack; |
| 941 | 81 delete _revisit_mdo_stack; |
| 0 | 82 // _manager_array and _stack_array are statics |
| 83 // shared with all instances of ParCompactionManager | |
| 84 // should not be deallocated. | |
| 85 } | |
| 86 | |
| 87 void ParCompactionManager::initialize(ParMarkBitMap* mbm) { | |
| 88 assert(PSParallelCompact::gc_task_manager() != NULL, | |
| 89 "Needed for initialization"); | |
| 90 | |
| 91 _mark_bitmap = mbm; | |
| 92 | |
| 93 uint parallel_gc_threads = PSParallelCompact::gc_task_manager()->workers(); | |
| 94 | |
| 95 assert(_manager_array == NULL, "Attempt to initialize twice"); | |
| 96 _manager_array = NEW_C_HEAP_ARRAY(ParCompactionManager*, parallel_gc_threads+1 ); | |
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97 guarantee(_manager_array != NULL, "Could not allocate manager_array"); |
| 0 | 98 |
| 99 _stack_array = new OopTaskQueueSet(parallel_gc_threads); | |
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100 guarantee(_stack_array != NULL, "Could not allocate stack_array"); |
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101 _objarray_queues = new ObjArrayTaskQueueSet(parallel_gc_threads); |
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102 guarantee(_objarray_queues != NULL, "Could not allocate objarray_queues"); |
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103 _region_array = new RegionTaskQueueSet(parallel_gc_threads); |
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104 guarantee(_region_array != NULL, "Could not allocate region_array"); |
| 0 | 105 |
| 106 // Create and register the ParCompactionManager(s) for the worker threads. | |
| 107 for(uint i=0; i<parallel_gc_threads; i++) { | |
| 108 _manager_array[i] = new ParCompactionManager(); | |
| 109 guarantee(_manager_array[i] != NULL, "Could not create ParCompactionManager"); | |
| 110 stack_array()->register_queue(i, _manager_array[i]->marking_stack()); | |
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111 _objarray_queues->register_queue(i, &_manager_array[i]->_objarray_queue); |
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112 #ifdef USE_RegionTaskQueueWithOverflow |
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113 region_array()->register_queue(i, _manager_array[i]->region_stack()->task_queue()); |
| 0 | 114 #else |
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115 region_array()->register_queue(i, _manager_array[i]->region_stack()); |
| 0 | 116 #endif |
| 117 } | |
| 118 | |
| 119 // The VMThread gets its own ParCompactionManager, which is not available | |
| 120 // for work stealing. | |
| 121 _manager_array[parallel_gc_threads] = new ParCompactionManager(); | |
| 122 guarantee(_manager_array[parallel_gc_threads] != NULL, | |
| 123 "Could not create ParCompactionManager"); | |
| 124 assert(PSParallelCompact::gc_task_manager()->workers() != 0, | |
| 125 "Not initialized?"); | |
| 126 } | |
| 127 | |
| 128 bool ParCompactionManager::should_update() { | |
| 129 assert(action() != NotValid, "Action is not set"); | |
| 130 return (action() == ParCompactionManager::Update) || | |
| 131 (action() == ParCompactionManager::CopyAndUpdate) || | |
| 132 (action() == ParCompactionManager::UpdateAndCopy); | |
| 133 } | |
| 134 | |
| 135 bool ParCompactionManager::should_copy() { | |
| 136 assert(action() != NotValid, "Action is not set"); | |
| 137 return (action() == ParCompactionManager::Copy) || | |
| 138 (action() == ParCompactionManager::CopyAndUpdate) || | |
| 139 (action() == ParCompactionManager::UpdateAndCopy); | |
| 140 } | |
| 141 | |
| 142 bool ParCompactionManager::should_verify_only() { | |
| 143 assert(action() != NotValid, "Action is not set"); | |
| 144 return action() == ParCompactionManager::VerifyUpdate; | |
| 145 } | |
| 146 | |
| 147 bool ParCompactionManager::should_reset_only() { | |
| 148 assert(action() != NotValid, "Action is not set"); | |
| 149 return action() == ParCompactionManager::ResetObjects; | |
| 150 } | |
| 151 | |
| 152 // For now save on a stack | |
| 153 void ParCompactionManager::save_for_scanning(oop m) { | |
| 154 stack_push(m); | |
| 155 } | |
| 156 | |
| 157 void ParCompactionManager::stack_push(oop obj) { | |
| 158 | |
| 159 if(!marking_stack()->push(obj)) { | |
| 160 overflow_stack()->push(obj); | |
| 161 } | |
| 162 } | |
| 163 | |
| 164 oop ParCompactionManager::retrieve_for_scanning() { | |
| 165 | |
| 166 // Should not be used in the parallel case | |
| 167 ShouldNotReachHere(); | |
| 168 return NULL; | |
| 169 } | |
| 170 | |
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171 // Save region on a stack |
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172 void ParCompactionManager::save_for_processing(size_t region_index) { |
| 0 | 173 #ifdef ASSERT |
| 174 const ParallelCompactData& sd = PSParallelCompact::summary_data(); | |
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175 ParallelCompactData::RegionData* const region_ptr = sd.region(region_index); |
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176 assert(region_ptr->claimed(), "must be claimed"); |
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177 assert(region_ptr->_pushed++ == 0, "should only be pushed once"); |
| 0 | 178 #endif |
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179 region_stack_push(region_index); |
| 0 | 180 } |
| 181 | |
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182 void ParCompactionManager::region_stack_push(size_t region_index) { |
| 0 | 183 |
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184 #ifdef USE_RegionTaskQueueWithOverflow |
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185 region_stack()->save(region_index); |
| 0 | 186 #else |
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187 if(!region_stack()->push(region_index)) { |
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188 region_overflow_stack()->push(region_index); |
| 0 | 189 } |
| 190 #endif | |
| 191 } | |
| 192 | |
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193 bool ParCompactionManager::retrieve_for_processing(size_t& region_index) { |
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194 #ifdef USE_RegionTaskQueueWithOverflow |
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195 return region_stack()->retrieve(region_index); |
| 0 | 196 #else |
| 197 // Should not be used in the parallel case | |
| 198 ShouldNotReachHere(); | |
| 199 return false; | |
| 200 #endif | |
| 201 } | |
| 202 | |
| 203 ParCompactionManager* | |
| 204 ParCompactionManager::gc_thread_compaction_manager(int index) { | |
| 205 assert(index >= 0 && index < (int)ParallelGCThreads, "index out of range"); | |
| 206 assert(_manager_array != NULL, "Sanity"); | |
| 207 return _manager_array[index]; | |
| 208 } | |
| 209 | |
| 210 void ParCompactionManager::reset() { | |
| 211 for(uint i=0; i<ParallelGCThreads+1; i++) { | |
| 212 manager_array(i)->revisit_klass_stack()->clear(); | |
| 941 | 213 manager_array(i)->revisit_mdo_stack()->clear(); |
| 0 | 214 } |
| 215 } | |
| 216 | |
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217 void ParCompactionManager::follow_marking_stacks() { |
| 0 | 218 do { |
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219 // Drain the overflow stack first, to allow stealing from the marking stack. |
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220 oop obj; |
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221 while (!overflow_stack()->is_empty()) { |
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222 overflow_stack()->pop()->follow_contents(this); |
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223 } |
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224 while (marking_stack()->pop_local(obj)) { |
| 0 | 225 obj->follow_contents(this); |
| 226 } | |
| 227 | |
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228 // Process ObjArrays one at a time to avoid marking stack bloat. |
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229 ObjArrayTask task; |
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230 if (!_objarray_overflow_stack->is_empty()) { |
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231 task = _objarray_overflow_stack->pop(); |
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232 objArrayKlass* const k = (objArrayKlass*)task.obj()->blueprint(); |
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233 k->oop_follow_contents(this, task.obj(), task.index()); |
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234 } else if (_objarray_queue.pop_local(task)) { |
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235 objArrayKlass* const k = (objArrayKlass*)task.obj()->blueprint(); |
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236 k->oop_follow_contents(this, task.obj(), task.index()); |
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237 } |
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238 } while (!marking_stacks_empty()); |
| 0 | 239 |
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240 assert(marking_stacks_empty(), "Sanity"); |
| 0 | 241 } |
| 242 | |
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243 void ParCompactionManager::drain_region_overflow_stack() { |
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244 size_t region_index = (size_t) -1; |
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245 while(region_stack()->retrieve_from_overflow(region_index)) { |
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246 PSParallelCompact::fill_and_update_region(this, region_index); |
| 0 | 247 } |
| 248 } | |
| 249 | |
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250 void ParCompactionManager::drain_region_stacks() { |
| 0 | 251 #ifdef ASSERT |
| 252 ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap(); | |
| 253 assert(heap->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity"); | |
| 254 MutableSpace* to_space = heap->young_gen()->to_space(); | |
| 255 MutableSpace* old_space = heap->old_gen()->object_space(); | |
| 256 MutableSpace* perm_space = heap->perm_gen()->object_space(); | |
| 257 #endif /* ASSERT */ | |
| 258 | |
| 259 #if 1 // def DO_PARALLEL - the serial code hasn't been updated | |
| 260 do { | |
| 261 | |
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262 #ifdef USE_RegionTaskQueueWithOverflow |
| 0 | 263 // Drain overflow stack first, so other threads can steal from |
| 264 // claimed stack while we work. | |
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265 size_t region_index = (size_t) -1; |
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266 while(region_stack()->retrieve_from_overflow(region_index)) { |
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267 PSParallelCompact::fill_and_update_region(this, region_index); |
| 0 | 268 } |
| 269 | |
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270 while (region_stack()->retrieve_from_stealable_queue(region_index)) { |
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271 PSParallelCompact::fill_and_update_region(this, region_index); |
| 0 | 272 } |
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273 } while (!region_stack()->is_empty()); |
| 0 | 274 #else |
| 275 // Drain overflow stack first, so other threads can steal from | |
| 276 // claimed stack while we work. | |
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277 while(!region_overflow_stack()->is_empty()) { |
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278 size_t region_index = region_overflow_stack()->pop(); |
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279 PSParallelCompact::fill_and_update_region(this, region_index); |
| 0 | 280 } |
| 281 | |
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282 size_t region_index = -1; |
| 0 | 283 // obj is a reference!!! |
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284 while (region_stack()->pop_local(region_index)) { |
| 0 | 285 // It would be nice to assert about the type of objects we might |
| 286 // pop, but they can come from anywhere, unfortunately. | |
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287 PSParallelCompact::fill_and_update_region(this, region_index); |
| 0 | 288 } |
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289 } while((region_stack()->size() != 0) || |
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290 (region_overflow_stack()->length() != 0)); |
| 0 | 291 #endif |
| 292 | |
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293 #ifdef USE_RegionTaskQueueWithOverflow |
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294 assert(region_stack()->is_empty(), "Sanity"); |
| 0 | 295 #else |
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296 assert(region_stack()->size() == 0, "Sanity"); |
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297 assert(region_overflow_stack()->length() == 0, "Sanity"); |
| 0 | 298 #endif |
| 299 #else | |
| 300 oop obj; | |
| 301 while (obj = retrieve_for_scanning()) { | |
| 302 obj->follow_contents(this); | |
| 303 } | |
| 304 #endif | |
| 305 } | |
| 306 | |
| 307 #ifdef ASSERT | |
| 308 bool ParCompactionManager::stacks_have_been_allocated() { | |
| 941 | 309 return (revisit_klass_stack()->data_addr() != NULL && |
| 310 revisit_mdo_stack()->data_addr() != NULL); | |
| 0 | 311 } |
| 312 #endif |